1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2022 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * Support for DT_RELR relative relocation format has been added to
13 glibc. This is a new ELF dynamic tag that improves the size of
14 relative relocations in shared object files and position independent
15 executables (PIE). DT_RELR generation requires linker support for
16 -z pack-relative-relocs option, which is supported for some targets
17 in recent binutils versions. Lazy binding doesn't apply to DT_RELR.
19 * On Linux, the pidfd_open, pidfd_getfd, and pidfd_send_signal functions
20 have been added. The pidfd functionality provides access to a process
21 while avoiding the issue of PID reuse on tranditional Unix systems.
23 * On Linux, the process_madvise function has been added. It has the
24 same functionality as madvise but alters the target process identified
27 * On Linux, the process_mrelease function has been added. It allows a
28 caller to release the memory of a dying process. The release of the
29 memory is carried out in the context of the caller, using the caller's
30 CPU affinity, and priority with CPU usage accounted to the caller.
32 * The “no-aaaa” DNS stub resolver option has been added. System
33 administrators can use it to suppress AAAA queries made by the stub
34 resolver, including AAAA lookups triggered by NSS-based interfaces
35 such as getaddrinfo. Only DNS lookups are affected: IPv6 data in
36 /etc/hosts is still used, getaddrinfo with AI_PASSIVE will still
37 produce IPv6 addresses, and configured IPv6 name servers are still
38 used. To produce correct Name Error (NXDOMAIN) results, AAAA queries
39 are translated to A queries. The new resolver option is intended
40 primarily for diagnostic purposes, to rule out that AAAA DNS queries
41 have adverse impact. It is incompatible with EDNS0 usage and DNSSEC
42 validation by applications.
44 * On Linux, the fsopen, fsmount, move_mount, fsconfig, fspick, open_tree,
45 and mount_setattr have been added. They are part of the new Linux kernel
46 mount APIs that allow applications to more flexibly configure and operate
47 on filesystem mounts. The new mount APIs are specifically designed to work
50 * localedef now accepts locale definition files encoded in UTF-8.
51 Previously, input bytes not within the ASCII range resulted in
54 * Support for the mbrtoc8 and c8rtomb multibyte/UTF-8 character conversion
55 functions has been added per the ISO C2X N2653 and C++20 P0482R6 proposals.
56 Support for the char8_t typedef has been added per the ISO C2X N2653
57 proposal. The functions are declared in uchar.h in C2X mode or when the
58 _GNU_SOURCE macro or C++20 __cpp_char8_t feature test macro is defined.
59 The char8_t typedef is declared in uchar.h in C2X mode or when the
60 _GNU_SOURCE macro is defined and the C++20 __cpp_char8_t feature test macro
61 is not defined (if __cpp_char8_t is defined, then char8_t is a builtin type).
63 * The functions arc4random, arc4random_buf, and arc4random_uniform have been
64 added. The functions wrap getrandom and/or /dev/urandom to return high-
65 quality randomness from the kernel.
67 * Support for LoongArch running on Linux has been added. This port requires
68 as least binutils 2.38, GCC 12, and Linux 5.19. Currently only hard-float
71 - loongarch64-linux-gnu
73 The LoongArch ABI is 64-bit little-endian.
75 Deprecated and removed features, and other changes affecting compatibility:
77 * Support for prelink will be removed in the next release; this includes
78 removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment
79 variables and their functionality in the dynamic loader.
81 * The Linux kernel version check has been removed along with the
82 LD_ASSUME_KERNEL environment variable. The minimum kernel used to built
83 glibc is still provided through NT_GNU_ABI_TAG ELF note and also printed
84 when libc.so is issued directly.
86 * On Linux, The LD_LIBRARY_VERSION environment variable has been removed.
88 The following bugs are resolved with this release:
90 [14932] dynamic-link: dlsym(handle, "foo") and dlsym(RTLD_NEXT, "foo")
91 return different result with versioned "foo"
92 [16355] libc: syslog.h's SYSLOG_NAMES namespace violation and utter
94 [23293] dynamic-link: aarch64: getauxval is broken when run as ld.so
95 ./exe and ld.so adjusts argv on the stack
96 [24595] nptl: [2.28 Regression]: Deadlock in atfork handler which
98 [25744] locale: mbrtowc with Big5-HKSCS returns 2 instead of 1 when
99 consuming the second byte of certain double byte characters
100 [25812] stdio: Libio vtable protection is sometimes only partially
102 [27054] libc: pthread_atfork handlers that call pthread_atfork
104 [27924] dynamic-link: ld.so: Support DT_RELR relative relocation
106 [28128] build: declare_symbol_alias doesn't work for assembly codes
107 [28566] network: getnameinfo with NI_NOFQDN is not thread safe
108 [28752] nss: Segfault in getpwuid when stat fails
109 [28815] libc: realpath should not copy to resolved buffer on error
110 [28828] stdio: fputwc crashes
111 [28838] libc: FAIL: elf/tst-p_align3
112 [28845] locale: ld-monetary.c should be updated to match ISO C and
114 [28850] libc: linux: __get_nprocs_sched reads uninitialized memory
116 [28852] libc: getaddrinfo leaks memory with AI_ALL
117 [28853] libc: tst-spawn6 changes current foreground process group
118 (breaks test isolation)
119 [28857] libc: FAIL: elf/tst-audit24a
120 [28860] build: --enable-kernel=5.1.0 build fails because of missing
121 __convert_scm_timestamps
122 [28865] libc: linux: _SC_NPROCESSORS_CONF and _SC_NPROCESSORS_ONLN are
123 inaccurate without /sys and /proc
124 [28868] dynamic-link: Dynamic loader DFS algorithm segfaults on
126 [28880] libc: Program crashes if date beyone 2038
127 [28883] libc: sysdeps/unix/sysv/linux/select.c: __select64
128 !__ASSUME_TIME64_SYSCALLS && !__ASSUME_PSELECT fails on Microblaze
129 [28896] string: strncmp-avx2-rtm and wcsncmp-avx2-rtm fallback on non-
130 rtm variants when avoiding overflow
131 [28922] build: The .d dependency files aren't always generated
132 [28931] libc: hosts lookup broken for SUCCESS=CONTINUE and
134 [28936] build: nm: No such file
135 [28950] localedata: Add locale for ISO code "tok" (Toki Pona)
136 [28953] nss: NSS lookup result can be incorrect if function lookup
138 [28970] math: benchtest: libmvec benchmark doesn't build with make
140 [28991] libc: sysconf(_SC_NPROCESSORS_CONF) should read
141 /sys/devices/system/cpu/possible
142 [28993] libc: closefrom() iterates until max int if no access to
144 [28996] libc: realpath fails to copy partial result to resolved buffer
146 [29027] math: [ia64] fabs fails with sNAN input
147 [29029] nptl: poll() spuriously returns EINTR during thread
148 cancellation and with cancellation disabled
149 [29030] string: GLIBC 2.35 regression - Fortify crash on certain valid
150 uses of mbsrtowcs (*** buffer overflow detected ***: terminated)
151 [29062] dynamic-link: Memory leak in _dl_find_object_update if object
152 is promoted to global scope
153 [29069] libc: fstatat64_time64_statx wrapper broken on MIPS N32 with
154 -D_FILE_OFFSET_BITS=64 and -D_TIME_BITS=64
155 [29071] dynamic-link: m68k: Removal of ELF_DURING_STARTUP optimization
157 [29097] time: fchmodat does not handle 64 bit time_t for
159 [29109] libc: posix_spawn() always returns 1 (EPERM) on clone()
161 [29141] libc: _FORTIFY_SOURCE=3 fail for gcc 12/glibc 2.35
162 [29162] string: [PATCH] string.h syntactic error:
163 include/bits/string_fortified.h:110: error: expected ',' or ';'
164 before '__fortified_attr_access'
165 [29165] libc: [Regression] broken argv adjustment
166 [29187] dynamic-link: [regression] broken argv adjustment for nios2
167 [29193] math: sincos produces a different output than sin/cos
168 [29197] string: __strncpy_power9() uses uninitialised register vs18
169 value for filling after \0
170 [29203] libc: daemon is not y2038 aware
171 [29204] libc: getusershell is not 2038 aware
172 [29207] libc: posix_fallocate fallback implementation is not y2038
174 [29208] libc: fpathconf(_PC_ASYNC_IO) is not y2038 aware
175 [29209] libc: isfdtype is not y2038 aware
176 [29210] network: ruserpass is not y2038 aware
177 [29211] libc: __open_catalog is not y2038 aware
178 [29213] libc: gconv_parseconfdir is not y2038 aware
179 [29214] nptl: pthread_setcanceltype fails to set type
180 [29225] network: Mistyped define statement in socket/sys/socket.h in
182 [29274] nptl: __read_chk is not a cancellation point
183 [29279] libc: undefined reference to `mbstowcs_chk' after
184 464d189b9622932a75302290625de84931656ec0
185 [29304] libc: mq_timedreceive does not handle 64 bit syscall return
186 correct for !__ASSUME_TIME64_SYSCALLS
187 [29403] libc: st_atim, st_mtim, st_ctim stat struct members are
188 missing on microblaze with largefile
194 * Unicode 14.0.0 Support: Character encoding, character type info, and
195 transliteration tables are all updated to Unicode 14.0.0, using
196 generator scripts contributed by Mike FABIAN (Red Hat).
198 * Bump r_version in the debugger interface to 2 and add a new field,
199 r_next, support multiple namespaces.
201 * Support for the C.UTF-8 locale has been added to glibc. The locale
202 supports full code-point sorting for all valid Unicode code points. A
203 limitation in the framework for fnmatch, regexec, and regcomp requires
204 a compromise to save space and only ASCII-based range expressions are
205 supported for now (see bug 28255). The full size of the locale is
206 only ~400KiB, with 346KiB coming from LC_CTYPE information for
207 Unicode. This locale harmonizes downstream C.UTF-8 already shipping
208 in various downstream distributions. The locale is not built into
209 glibc, and must be installed.
211 * <math.h> functions that round their results to a narrower type, and
212 corresponding <tgmath.h> macros, are added from TS 18661-1:2014, TS
213 18661-3:2015 and draft ISO C2X:
215 - fsqrt, fsqrtl, dsqrtl and corresponding fMsqrtfN, fMsqrtfNx,
216 fMxsqrtfN and fMxsqrtfNx functions.
218 - ffma, ffmal, dfmal and corresponding fMfmafN, fMfmafNx, fMxfmafN and
221 * <math.h> functions for floating-point maximum and minimum,
222 corresponding to new operations in IEEE 754-2019, and corresponding
223 <tgmath.h> macros, are added from draft ISO C2X: fmaximum,
224 fmaximum_num, fmaximum_mag, fmaximum_mag_num, fminimum, fminimum_num,
225 fminimum_mag, fminimum_mag_num and corresponding functions for float,
226 long double, _FloatN and _FloatNx.
228 * <math.h> macros for single-precision float constants are added as a
229 GNU extension: M_Ef, M_LOG2Ef, M_LOG10Ef, M_LN2f, M_LN10f, M_PIf,
230 M_PI_2f, M_PI_4f, M_1_PIf, M_2_PIf, M_2_SQRTPIf, M_SQRT2f and
233 * The __STDC_IEC_60559_BFP__ and __STDC_IEC_60559_COMPLEX__ macros are
234 predefined as specified in TS 18661-1:2014.
236 * The exp10 functions in <math.h> now have a corresponding type-generic
239 * The ISO C2X macro _PRINTF_NAN_LEN_MAX has been added to <stdio.h>.
241 * printf-family functions now support the %b format for output of
242 integers in binary, as specified in draft ISO C2X, and the %B variant
243 of that format recommended by draft ISO C2X.
245 * A new DSO sorting algorithm has been added in the dynamic linker that uses
246 topological sorting by depth-first search (DFS), solving performance issues
247 of the existing sorting algorithm when encountering particular circular
248 object dependency cases.
250 * A new tunable, glibc.rtld.dynamic_sort, can be used to select between
251 the two DSO sorting algorithms. The default setting of '2' uses the
252 new DFS-based algorithm. The setting '1' switches to the old
253 algorithm used in glibc 2.33 and earlier.
255 * ABI support for a new function '__memcmpeq'. '__memcmpeq' is meant
256 to be used by compilers for optimizing usage of 'memcmp' when its
257 return value is only used for its boolean status.
259 * Support for automatically registering threads with the Linux rseq
260 system call has been added. This system call is implemented starting
261 from Linux 4.18. The Restartable Sequences ABI accelerates user-space
262 operations on per-cpu data. It allows user-space to perform updates
263 on per-cpu data without requiring heavy-weight atomic operations.
264 Automatically registering threads allows all libraries, including
265 libc, to make immediate use of the rseq support by using the
266 documented ABI, via the __rseq_flags, __rseq_offset, and __rseq_size
267 variables. The GNU C Library manual has details on integration of
268 Restartable Sequences.
270 * A symbolic link to the dynamic linker is now installed under
271 /usr/bin/ld.so (or more precisely, '${bindir}/ld.so').
273 * All programs and the testsuite in glibc are now built as position independent
274 executables (PIE) by default on toolchains and architectures that support it.
275 Further, if the toolchain and architecture supports it, even static programs
276 are built as PIE and the resultant glibc can be used to build static PIE
277 executables. A new option --disable-default-pie has been added to disable
278 this behavior and get a non-PIE build. This option replaces
279 --enable-static-pie, which no longer has any effect on the build
282 * On Linux, a new tunable, glibc.malloc.hugetlb, can be used to
283 either make malloc issue madvise plus MADV_HUGEPAGE on mmap and sbrk
284 or to use huge pages directly with mmap calls with the MAP_HUGETLB
285 flags). The former can improve performance when Transparent Huge Pages
286 is set to 'madvise' mode while the latter uses the system reserved
289 * The printf family of functions now handles the flagged %#m conversion
290 specifier, printing errno as an error constant (similar to strerrorname_np).
292 * The function _dl_find_object has been added. In-process unwinders
293 can use it to efficiently locate unwinding information for a code
296 * Support for OpenRISC running on Linux has been added. This port requires
297 as least binutils 2.35, GCC 11, and Linux 5.4. Currently only soft-float
302 The OpenRISC ABI is 32-bit big-endian and uses 64-bit time (y2038 safe) and
303 64-bit file offsets (LFS default).
305 * A new configure option, --with-rtld-early-cflags, can be used to
306 specify additional compiler flags for building the early startup code
307 of the dynamic linker. On targets which have CPU compatibility
308 checks, this can help to ensure that proper diagnostics are printed if
309 the dynamic loader runs on an incompatible CPU.
311 * On Linux, the epoll_pwait2 function has been added. It is similar to
312 epoll_wait with the difference the timeout has nanoseconds resolution.
314 * The function posix_spawn_file_actions_addtcsetpgrp_np has been added,
315 enabling posix_spawn and posix_spawnp to set the controlling terminal in
316 the new process in a race free manner. This function is a GNU extension.
318 * Source fortification (_FORTIFY_SOURCE) level 3 is now available for
319 applications compiling with glibc and gcc 12 and later. Level 3 leverages
320 the __builtin_dynamic_object_size function to deliver additional
321 fortification balanced against additional runtime cost (checking non-constant
324 * The audit libraries will avoid unnecessary slowdown if it is not required
325 PLT tracking (by not implementing the la_pltenter or la_pltexit callbacks).
327 Deprecated and removed features, and other changes affecting compatibility:
329 * On x86-64, the LD_PREFER_MAP_32BIT_EXEC environment variable support
330 has been removed since the first PT_LOAD segment is no longer executable
331 due to defaulting to -z separate-code.
333 * The r_version update in the debugger interface makes the glibc binary
334 incompatible with GDB binaries built without the following commits:
336 c0154a4a21a gdb: Don't assume r_ldsomap when r_version > 1 on Linux
337 4eb629d50d4 gdbserver: Check r_version < 1 for Linux debugger interface
339 when audit modules or dlmopen are used.
341 * Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) has been removed.
343 * The --enable-static-pie option is no longer available. The glibc build
344 configuration script now automatically detects static-pie support in the
345 toolchain and architecture and enables it if available.
347 * The catchsegv script and associated libSegFault.so shared object have
348 been removed. There are widely-deployed out-of-process alternatives for
349 catching coredumps and backtraces.
351 * Support for prelink will be removed in the next release; this includes
352 removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment
353 variables and their functionality in the dynamic loader.
355 * The LD_TRACE_PRELINKING environment variable has been removed. Similar
356 functionality to obtain the program mapping address can be achieved by
357 using LD_TRACE_LOADED_OBJECTS to value of 2.
359 * The LD_USE_LOAD_BIAS has been removed. The variable was mainly used to
360 support prelink PIE binaries.
362 Changes to build and runtime requirements:
364 * The audit module interface version LAV_CURRENT is increased to enable
365 proper bind-now support. The loader now advertises via the la_symbind
366 flags that PLT trace is not possible. New audit modules require the
367 new dynamic loader supporing the latest LAV_CURRENT version. Old audit
368 modules are still loaded for all targets except aarch64.
370 * The audit interface on aarch64 is extended to support both the indirect
371 result location register (x8) and NEON Q register. Old audit modules are
372 rejected by the loader. Audit modules must be rebuilt to use the newer
373 structure sizes and the latest module interface version for LAV_CURRENT.
375 Security related changes:
377 CVE-2022-23219: Passing an overlong file name to the clnt_create
378 legacy function could result in a stack-based buffer overflow when
379 using the "unix" protocol. Reported by Martin Sebor.
381 CVE-2022-23218: Passing an overlong file name to the svcunix_create
382 legacy function could result in a stack-based buffer overflow.
384 CVE-2021-3998: Passing a path longer than PATH_MAX to the realpath
385 function could result in a memory leak and potential access of
386 uninitialized memory. Reported by Qualys.
388 CVE-2021-3999: Passing a buffer of size exactly 1 byte to the getcwd
389 function may result in an off-by-one buffer underflow and overflow
390 when the current working directory is longer than PATH_MAX and also
391 corresponds to the / directory through an unprivileged mount
392 namespace. Reported by Qualys.
394 The following bugs are resolved with this release:
396 [12889] nptl: Race condition in pthread_kill
397 [14232] nptl: tst-cancel7 and tst-cancelx7 race condition
398 [14913] libc: [mips] Clean up MIPS 64-bit register-dump.h output
399 [15310] dynamic-link: _dl_sort_fini is O(n^3) causing slow exit when
401 [15333] libc: Use 64-bit stat functions in installed programs
402 [15533] dynamic-link: LD_AUDIT introduces an avoidable performance
404 [15971] dynamic-link: No interface for debugger access to libraries
406 [17318] locale: [RFE] Provide a C.UTF-8 locale by default
407 [17645] dynamic-link: RFE: Improve performance of dynamic loader for
408 deeply nested DSO dependencies.
409 [19193] nptl: pthread_kill, pthread_cancel return ESRCH for a thread
410 ID whose lifetime has not ended
411 [22542] network: buffer overflow in sunrpc clnt_create
413 [22716] malloc: [PATCH] mtrace.pl: use TRACE_PRELINKING instead of
415 [25947] malloc: memory leak in muntrace
416 [26045] math: fmaxf(inf, nan) does not always work
417 [26108] math: exp10() has problems with <tgmath.h>
418 [26779] build: benign use after realloc at localealias.c:329
419 [27609] dynamic-link: [2.32/2.33/2.34 Regression] In elf/dl-open.c
420 (_dl_open) we might use __LM_ID_CALLER to index GL(dl_ns)[]
421 [27945] build: build-many-glibcs.py doesn't configure GCC with
422 --enable-initfini-array
423 [27991] build: x86: sysdeps/x86/configure.ac breaks when
424 libc_cv_include_x86_isa_level is loaded from cache
425 [28036] nptl: Incorrect types for pthread_mutexattr_set/getrobust_np
426 in __REDIRECT_NTH macro
427 [28061] dynamic-link: A failing dlmopen called by an auditor crashed
428 [28062] dynamic-link: Suppress audit calls when a (new) namespace is
430 [28126] libc: nftw aborts for paths longer than PATH_MAX
431 [28129] dynamic-link: Unnecessary check DT_DEBUG in ld.so
432 [28153] libc: [test] gmon/tst-gmon-gprof* may have a f3 line when
434 [28182] libc: _TIME_BITS=64 in C++ has issues with fcntl, ioctl, prctl
435 [28185] math: Inaccurate j0f function (again)
436 [28199] locale: iconvconfig prefix flag behaves differently in glibc
438 [28203] dynamic-link: aarch64: elf_machine_{load_address,dynamic}
439 should drop _GLOBAL_OFFSET_TABLE_[0] in favor of __ehdr_start for
441 [28213] librt: NULL pointer dereference in mq_notify (CVE-2021-38604)
442 [28223] libc: mips: clone does not align stack
443 [28253] dynamic-link: Missing colon in LD_SHOW_AUXV output after
445 [28256] malloc: Conditional jump or move depends on uninitialised
446 value(s) in __GI___tunables_init
447 [28260] build: io/tst-closefrom, misc/tst-close_range, posix/tst-
448 spawn5 fail if stray fds are open
449 [28310] libc: Do not use affinity mask for sysconf
450 (_SC_NPROCESSORS_CONF)
451 [28338] time: undefined behavior in __tzfile_compute with oddball TZif
453 [28340] dynamic-link: ld.so crashes while loading a DSO with a read-
455 [28349] libc: Segfault for ping -R on qemux86 caused by recvmsg()
456 [28350] libc: ping receives SIGABRT on lib32-qemux86-64 caused by
458 [28353] network: Race condition on __opensock
459 [28357] dynamic-link: deadlock between pthread_create and ctors
460 [28358] math: f64xdivf128 and f64xmulf128 spurious underflows
461 [28361] nptl: Fix for bug 12889 causes setxid deadlock
462 [28368] build: -Waddress instances in stdio-common/vfprintf-internal.c
463 [28390] localedata: Update locale data to Unicode 14.0.0
464 [28397] math: tgmath.h should not define fmaxmag, fminmag macros for
466 [28400] libc: [2.35 Regression] string/test-strncasecmp: cannot set
468 [28407] nptl: pthread_kill assumes that kill (getpid ()) is equivalent
469 to tgkill (getpid (), gettid())
470 [28455] dynamic-link: -Wl,--enable-new-dtags doesn't work
471 [28457] dynamic-link: Missing reldepmod4.so dependency for
473 [28469] time: linux: struct timex is not correctly set for 32-bit
474 systems with TIMESIZE=64
475 [28470] regex: Buffer read overrun in regular expression searching
476 [28475] string: Incorrect access attribute on memfrob
477 [28524] libc: Conversion from ISO-2022-JP-3 with iconv may emit
478 spurious NUL character on state reset
479 [28532] libc: powerpc64[le]: CFI for assembly templated syscalls is
481 [28550] dynamic-link: FAIL: tst-dso-
482 ordering9_112-ecbda(GLIBC_TUNABLES=glibc.rtld.dynamic_sort=1)
484 [28554] build: Undefined generate-md5
485 [28572] libc: Misaligned accesses in test-memcpy and test-mempcpy on
487 [28607] nptl: Masked signals are delivered on thread exit
488 [28624] libc: openjdk 8/9 assume uni processor and gets stuck due to
489 lack of cpu counting /proc fallback with glibc 2.34
490 [28646] string: [2.35 Regression] mock -r fedora-36-x86_64
491 /tmp/java-1.8.0-openjdk-1.8.0.312.b07-2.fc36.src.rpm& fails to build
492 [28648] dynamic-link: Running ld.so on statically linked binaries
494 [28656] dynamic-link: LD_PREFER_MAP_32BIT_EXEC no longer works due to
496 [28676] dynamic-link: p_align on PT_LOAD segment in DSO isn't honored
497 [28678] nptl: nptl/tst-create1 hangs sporadically
498 [28688] dynamic-link: PT_LOAD p_align check is too strict
499 [28700] nss: "dns [!UNAVAIL=return] files" default for hosts database
501 [28707] time: assert in tzfile.c __tzfile_read striking with truncated
502 timezones generated by tzcode-2021d and later
503 [28713] math: GCC 12 miscompiles libm
504 [28732] dynamic-link: FAIL: elf/tst-dl_find_object
505 [28738] build: LIBC_LINKER_FEATURE doesn't work on linker -z option
506 [28745] dynamic-link: _dl_find_object miscompilation on powerpc64le
507 [28746] libc: _FORTIFY_SOURCE does not work for stpcpy
508 [28749] libc: Inconsistency detected by ld.so: rtld.c: 1632: dl_main:
509 Assertion `GL(dl_rtld_map).l_libname' failed!
510 [28755] string: overflow bug in wcsncmp_avx2 and wcsncmp_evex
511 [28757] nptl: GDB printer tests failed with new GDB
512 [28765] math: x86_64 libmvec atan2 accuracy
513 [28766] manual: Document libmvec accuracy
514 [28768] network: Buffer overflow in svcunix_create with long pathnames
516 [28769] libc: Off-by-one buffer overflow/underflow in getcwd()
518 [28770] libc: Unexpected return value from realpath() for too long
519 results (CVE-2021-3998)
520 [28771] libc: %ebx optimization macros are incompatible with .altmacro
522 [28780] build: --disable-default-pie doesn't work on static programs
523 [28782] libc: x86-64 ISA level for glibc itself is always
525 [28792] glob: possible wrong behaviour with patterns with double [
527 [28837] libc: FAIL: socket/tst-socket-timestamp-compat
528 [28847] locale: Empty mon_decimal_point in LC_MONETARY results in non-
529 empty mon_decimal_point_wc
536 * In order to support smoother in-place-upgrades and to simplify
537 the implementation of the runtime all functionality formerly
538 implemented in the libraries libpthread, libdl, libutil, libanl has
539 been integrated into libc. New applications do not need to link with
540 -lpthread, -ldl, -lutil, -lanl anymore. For backwards compatibility,
541 empty static archives libpthread.a, libdl.a, libutil.a, libanl.a are
542 provided, so that the linker options keep working. Applications which
543 have been linked against glibc 2.33 or earlier continue to load the
544 corresponding shared objects (which are now empty). The integration
545 of those libraries into libc means that additional symbols become
546 available by default. This can cause applications that contain weak
547 references to take unexpected code paths that would only have been
548 used in previous glibc versions when e.g. preloading libpthread.so.0,
549 potentially exposing application bugs.
551 * When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined,
552 PTHREAD_STACK_MIN is no longer constant and is redefined to
553 sysconf(_SC_THREAD_STACK_MIN). This supports dynamic sized register
554 sets for modern architectural features like Arm SVE.
556 * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE
557 or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
558 constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
559 and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ). This supports
560 dynamic sized register sets for modern architectural features like
563 * The dynamic linker implements the --list-diagnostics option, printing
564 a dump of information related to IFUNC resolver operation and
565 glibc-hwcaps subdirectory selection.
567 * On Linux, the function execveat has been added. It operates similar to
568 execve and it is is already used to implement fexecve without requiring
569 /proc to be mounted. However, different than fexecve, if the syscall is not
570 supported by the kernel an error is returned instead of trying a fallback.
572 * The ISO C2X function timespec_getres has been added.
574 * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO
575 C2X, is supported to enable declarations of functions defined in Annex F
576 of C2X. Those declarations are also enabled when
577 __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is
578 defined, and when _GNU_SOURCE is defined.
580 * On powerpc64*, glibc can now be compiled without scv support using the
581 --disable-scv configure option.
583 * Add support for 64-bit time_t on configurations like x86 where time_t
584 is traditionally 32-bit. Although time_t still defaults to 32-bit on
585 these configurations, this default may change in future versions.
586 This is enabled with the _TIME_BITS preprocessor macro set to 64 and is
587 only supported when LFS (_FILE_OFFSET_BITS=64) is also enabled. It is
588 only enabled for Linux and the full support requires a minimum kernel
591 * The main gconv-modules file in glibc now contains only a small set of
592 essential converter modules and the rest have been moved into a supplementary
593 configuration file gconv-modules-extra.conf in the gconv-modules.d directory
594 in the same GCONV_PATH. Similarly, external converter modules directories
595 may have supplementary configuration files in a gconv-modules.d directory
596 with names ending with .conf to logically classify the converter modules in
599 * On Linux, a new tunable, glibc.pthread.stack_cache_size, can be used
600 to configure the size of the thread stack cache.
602 * The function _Fork has been added as an async-signal-safe fork replacement
603 since Austin Group issue 62 droped the async-signal-safe requirement for
604 fork (and it will be included in the future POSIX standard). The new _Fork
605 function does not run any atfork function neither resets any internal state
606 or lock (such as the malloc one), and only sets up a minimal state required
607 to call async-signal-safe functions (such as raise or execve). This function
608 is currently a GNU extension.
610 * On Linux, the close_range function has been added. It allows efficiently
611 closing a range of file descriptors on recent kernels (version 5.9).
613 * The function closefrom has been added. It closes all file descriptors
614 greater than or equal to a given integer. This function is a GNU extension,
615 although it is also present in other systems.
617 * The posix_spawn_file_actions_addclosefrom_np function has been added,
618 enabling posix_spawn and posix_spawnp to close all file descriptors greater
619 than or equal to a given integer. This function is a GNU extension,
620 although Solaris also provides a similar function.
622 * When invoked explicitly, the dynamic linker now uses the kernel to
623 execute programs that do not have any dynamic dependency (that is,
624 they are statically linked). This feature is Linux-specific.
626 Deprecated and removed features, and other changes affecting compatibility:
628 * The function pthread_mutex_consistent_np has been deprecated; programs
629 should use the equivalent standard function pthread_mutex_consistent
632 * The function pthread_mutexattr_getrobust_np has been deprecated;
633 programs should use the equivalent standard function
634 pthread_mutexattr_getrobust instead.
636 * The function pthread_mutexattr_setrobust_np has been deprecated;
637 programs should use the equivalent standard function
638 pthread_mutexattr_setrobust instead.
640 * The function pthread_yield has been deprecated; programs should use
641 the equivalent standard function sched_yield instead.
643 * The function inet_neta declared in <arpa/inet.h> has been deprecated.
645 * Various rarely-used functions declared in <resolv.h> and
646 <arpa/nameser.h> have been deprecated. Applications are encouraged to
647 use dedicated DNS processing libraries if applicable. For <resolv.h>,
648 this affects the functions dn_count_labels, fp_nquery, fp_query,
649 fp_resstat, hostalias, loc_aton, loc_ntoa, p_cdname, p_cdnname,
650 p_class, p_fqname, p_fqnname, p_option, p_query, p_rcode, p_time,
651 p_type, putlong, putshort, res_hostalias, res_isourserver,
652 res_nameinquery, res_queriesmatch, res_randomid, sym_ntop, sym_ntos,
653 sym_ston. For <arpa/nameser.h>, the functions ns_datetosecs,
654 ns_format_ttl, ns_makecanon, ns_parse_ttl, ns_samedomain, ns_samename,
655 ns_sprintrr, ns_sprintrrf, ns_subdomain have been deprecated.
657 * Various symbols previously defined in libresolv have been moved to libc
658 in order to prepare for libresolv moving entirely into libc (see earlier
659 entry for merging libraries into libc). The symbols __dn_comp,
660 __dn_expand, __dn_skipname, __res_dnok, __res_hnok, __res_mailok,
661 __res_mkquery, __res_nmkquery, __res_nquery, __res_nquerydomain,
662 __res_nsearch, __res_nsend, __res_ownok, __res_query, __res_querydomain,
663 __res_search, __res_send formerly in libresolv have been renamed and no
664 longer have a __ prefix. They are now available in libc.
666 * The pthread cancellation handler is now installed with SA_RESTART and
667 pthread_cancel will always send the internal SIGCANCEL on a cancellation
668 request. It should not be visible to applications since the cancellation
669 handler should either act upon cancellation (if asynchronous cancellation
670 is enabled) or ignore the cancellation internal signal. However there are
671 buggy kernel interfaces (for instance some CIFS versions) that could still
672 see a spurious EINTR error when cancellation interrupts a blocking syscall.
674 * Previously, glibc installed its various shared objects under versioned
675 file names such as libc-2.33.so. The ABI sonames (e.g., libc.so.6)
676 were provided as symbolic links. Starting with glibc 2.34, the shared
677 objects are installed under their ABI sonames directly, without
678 symbolic links. This increases compatibility with distribution
679 package managers that delete removed files late during the package
680 upgrade or downgrade process.
682 * The symbols mallwatch and tr_break are now deprecated and no longer used in
683 mtrace. Similar functionality can be achieved by using conditional
684 breakpoints within mtrace functions from within gdb.
686 * The __morecore and __after_morecore_hook malloc hooks and the default
687 implementation __default_morecore have been removed from the API. Existing
688 applications will continue to link against these symbols but the interfaces
689 no longer have any effect on malloc.
691 * Debugging features in malloc such as the MALLOC_CHECK_ environment variable
692 (or the glibc.malloc.check tunable), mtrace() and mcheck() have now been
693 disabled by default in the main C library. Users looking to use these
694 features now need to preload a new debugging DSO libc_malloc_debug.so to get
695 this functionality back.
697 * The deprecated functions malloc_get_state and malloc_set_state have been
698 moved from the core C library into libc_malloc_debug.so. Legacy applications
699 that still use these functions will now need to preload libc_malloc_debug.so
700 in their environment using the LD_PRELOAD environment variable.
702 * The deprecated memory allocation hooks __malloc_hook, __realloc_hook,
703 __memalign_hook and __free_hook are now removed from the API. Compatibility
704 symbols are present to support legacy programs but new applications can no
705 longer link to these symbols. These hooks no longer have any effect on glibc
706 functionality. The malloc debugging DSO libc_malloc_debug.so currently
707 supports hooks and can be preloaded to get this functionality back for older
708 programs. However this is a transitional measure and may be removed in a
709 future release of the GNU C Library. Users may port away from these hooks by
710 writing and preloading their own malloc interposition library.
712 Changes to build and runtime requirements:
714 * On Linux, the shm_open, sem_open, and related functions now expect the
715 file shared memory file system to be mounted at /dev/shm. These functions
716 no longer search among the system's mount points for a suitable
717 replacement if /dev/shm is not available.
719 Security related changes:
721 CVE-2021-27645: The nameserver caching daemon (nscd), when processing
722 a request for netgroup lookup, may crash due to a double-free,
723 potentially resulting in degraded service or Denial of Service on the
724 local system. Reported by Chris Schanzle.
726 CVE-2021-33574: The mq_notify function has a potential use-after-free
727 issue when using a notification type of SIGEV_THREAD and a thread
728 attribute with a non-default affinity mask.
730 CVE-2021-35942: The wordexp function may overflow the positional
731 parameter number when processing the expansion resulting in a crash.
732 Reported by Philippe Antoine.
734 The following bugs are resolved with this release:
736 [4737] libc: fork is not async-signal-safe
737 [5781] math: Slow dbl-64 sin/cos/sincos for special values
738 [10353] libc: Methods for deleting all file descriptors greater than
739 given integer (closefrom)
740 [14185] glob: fnmatch() fails when '*' wildcard is applied on the file
741 name containing multi-byte character(s)
742 [14469] math: Inaccurate j0f function
743 [14470] math: Inaccurate j1f function
744 [14471] math: Inaccurate y0f function
745 [14472] math: Inaccurate y1f function
746 [14744] nptl: kill -32 $pid or kill -33 $pid on a process cancels a
748 [15271] dynamic-link: dlmopen()ed shared library with LM_ID_NEWLM
749 crashes if it fails dlsym() twice
750 [15648] nptl: multiple definition of `__lll_lock_wait_private'
751 [16063] nptl: Provide a pthread_once variant in libc directly
752 [17144] libc: syslog is not thread-safe if NO_SIGPIPE is not defined
753 [17145] libc: syslog with LOG_CONS leaks console file descriptor
754 [17183] manual: description of ENTRY struct in <search.h> in glibc
756 [18435] nptl: pthread_once hangs when init routine throws an exception
757 [18524] nptl: Missing calloc error checking in
758 __cxa_thread_atexit_impl
759 [19329] dynamic-link: dl-tls.c assert failure at concurrent
760 pthread_create and dlopen
761 [19366] nptl: returning from a thread should disable cancellation
762 [19511] nptl: 8MB memory leak in pthread_create in case of failure
763 when non-root user changes priority
764 [20802] dynamic-link: getauxval NULL pointer dereference after static
766 [20813] nptl: pthread_exit is inconsistent between libc and libpthread
767 [22057] malloc: malloc_usable_size is broken with mcheck
768 [22668] locale: LC_COLLATE: the last character of ellipsis is not
770 [23323] libc: [RFE] CSU startup hardening.
771 [23328] malloc: Remove malloc hooks and ensure related APIs return no
773 [23462] dynamic-link: Static binary with dynamic string tokens ($LIB,
774 $PLATFORM, $ORIGIN) crashes
775 [23489] libc: "gcc -lmcheck" aborts on free when using posix_memalign
776 [23554] nptl: pthread_getattr_np reports wrong stack size with
778 [24106] libc: Bash interpreter in ldd script is taken from host
779 [24773] dynamic-link: dlerror in an secondary namespace does not use
780 the right free implementation
781 [25036] localedata: Update collation order for Swedish
782 [25383] libc: where_is_shmfs/__shm_directory/SHM_GET_NAME may cause
783 shm_open to pick wrong directory
784 [25680] dynamic-link: ifuncmain9picstatic and ifuncmain9picstatic
785 crash in IFUNC resolver due to stack canary (--enable-stack-
787 [26874] build: -Warray-bounds in _IO_wdefault_doallocate
788 [26983] math: [x86_64] x86_64 tgamma has too large ULP error
789 [27111] dynamic-link: pthread_create and tls access use link_map
790 objects that may be concurrently freed by dlclose
791 [27132] malloc: memusagestat is linked to system librt, leading to
792 undefined symbols on major version upgrade
793 [27136] dynamic-link: dtv setup at thread creation may leave an entry
795 [27249] libc: libSegFault.so does not output signal number properly
796 [27304] nptl: pthread_cond_destroy does not pass private flag to futex
798 [27318] dynamic-link: glibc fails to load binaries when built with
799 -march=sandybridge: CPU ISA level is lower than required
800 [27343] nss: initgroups() SIGSEGVs when called on a system without
801 nsswich.conf (in a chroot)
802 [27346] dynamic-link: x86: PTWRITE feature check is missing
803 [27389] network: NSS chroot hardening causes regressions in chroot
805 [27403] dynamic-link: aarch64: tlsdesc htab is not freed on dlclose
806 [27444] libc: sysconf reports unsupported option (-1) for
807 _SC_LEVEL1_ICACHE_LINESIZE on X86 since v2.33
808 [27462] nscd: double-free in nscd (CVE-2021-27645)
809 [27468] malloc: aarch64: realloc crash with heap tagging: FAIL:
810 malloc/tst-malloc-thread-fail
811 [27498] dynamic-link: __dl_iterate_phdr lacks unwinding information
812 [27511] libc: S390 memmove assumes Vector Facility when MIE Facility 3
814 [27522] glob: glob, glob64 incorrectly marked as __THROW
815 [27555] dynamic-link: Static tests fail with --enable-stack-
817 [27559] libc: fstat(AT_FDCWD) succeeds (it shouldn't) and returns
818 information for the current directory
819 [27577] dynamic-link: elf/ld.so --help doesn't work
820 [27605] libc: tunables can't control xsave/xsavec selection in
822 [27623] libc: powerpc: Missing registers in sc[v] clobbers list
823 [27645] libc: [linux] sysconf(_SC_NPROCESSOR...) breaks down on
825 [27646] dynamic-link: Linker error for non-existing NSS symbols (e.g.
826 _nss_files_getcanonname_r) from within a dlmopen namespace.
827 [27648] libc: FAIL: misc/tst-select
828 [27650] stdio: vfscanf returns too early if a match is longer than
830 [27651] libc: Performance regression after updating to 2.33
831 [27655] string: Wrong size calculation in string/test-strnlen.c
832 [27706] libc: select fails to update timeout on error
833 [27709] libc: arm: FAIL: debug/tst-longjmp_chk2
834 [27721] dynamic-link: x86: ld_audit ignores bind now for TLSDESC and
835 tries resolving them lazily
836 [27744] nptl: Support different libpthread/ld.so load orders in
838 [27749] libc: Data race __run_exit_handlers
839 [27761] libc: getconf: Segmentation fault when passing '-vq' as
841 [27832] nss: makedb.c:797:7: error: 'writev' specified size 4294967295
842 exceeds maximum object size 2147483647
843 [27870] malloc: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to
845 [27872] build: Obsolete configure option --enable-stackguard-
847 [27873] build: tst-cpu-features-cpuinfo fail when building on AMD cpu
848 [27882] localedata: Use U+00AF MACRON in more EBCDIC charsets
849 [27892] libc: powerpc: scv ABI error handling fails to check
851 [27896] nptl: mq_notify does not handle separately allocated thread
852 attributes (CVE-2021-33574)
853 [27901] libc: TEST_STACK_ALIGN doesn't work
854 [27902] libc: The x86-64 clone wrapper fails to align child stack
855 [27914] nptl: Install SIGSETXID handler with SA_ONSTACK
856 [27939] libc: aarch64: clone does not align the stack
857 [27968] libc: s390x: clone does not align the stack
858 [28011] libc: Wild read in wordexp (parse_param) (CVE-2021-35942)
859 [28024] string: s390(31bit): Wrong result of memchr (MEMCHR_Z900_G5)
861 [28028] malloc: malloc: tcache shutdown sequence does not work if the
862 thread never allocated anything
863 [28033] libc: Need to check RTM_ALWAYS_ABORT for RTM
864 [28064] string: x86_64:wcslen implementation list has wcsnlen
865 [28067] libc: FAIL: posix/tst-spawn5
866 [28068] malloc: FAIL: malloc/tst-mallocalign1-mcheck
867 [28071] time: clock_gettime, gettimeofday, time lost vDSO acceleration
869 [28075] nis: Out-of-bounds static buffer read in nis_local_domain
870 [28089] build: tst-tls20 fails when linker defaults to --as-needed
871 [28090] build: elf/tst-cpu-features-cpuinfo-static fails on certain
873 [28091] network: ns_name_skip may return 0 for domain names without
881 * The dynamic linker accepts the --list-tunables argument which prints
882 all the supported tunables. This option is disable if glibc is
883 configured with tunables disabled (--enable-tunables=no).
885 * The dynamic linker accepts the --argv0 argument and provides opportunity
886 to change argv[0] string.
888 * The dynamic linker loads optimized implementations of shared objects
889 from subdirectories under the glibc-hwcaps directory on the library
890 search path if the system's capabilities meet the requirements for
891 that subdirectory. Initially supported subdirectories include
892 "power9" and "power10" for the powerpc64le-linux-gnu architecture,
893 "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
894 "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the
895 subdirectory names correspond to the vendor-independent x86-64
896 microarchitecture levels defined in the x86-64 psABI supplement.
898 * The new --help option of the dynamic linker provides usage and
899 information and library search path diagnostics.
901 * The mallinfo2 function is added to report statistics as per mallinfo,
902 but with larger field widths to accurately report values that are
903 larger than fit in an integer.
905 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
907 * Support for the RISC-V ISA running on Linux has been expanded to run on
908 32-bit hardware. This is supported for the following ISA and ABI pairs:
914 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
917 * A new fortification level _FORTIFY_SOURCE=3 is available. At this level,
918 glibc may use additional checks that may have an additional performance
919 overhead. At present these checks are available only on LLVM 9 and later.
920 The latest GCC available at this time (10.2) does not support this level of
923 Deprecated and removed features, and other changes affecting compatibility:
925 * The mallinfo function is marked deprecated. Callers should call
928 * When dlopen is used in statically linked programs, alternative library
929 implementations from HWCAP subdirectories are no longer loaded.
930 Instead, the default implementation is used.
932 * The deprecated <sys/vtimes.h> header and the function vtimes have been
933 removed. To support old binaries, the vtimes function continues to exist
934 as a compatibility symbol. Applications should use the getrlimit or
937 * Following a change in the tzdata 2018a release upstream, the zdump
938 program is now installed in the /usr/bin subdirectory. Previously,
939 the /usr/sbin subdirectory was used.
941 * On s390(x), the type float_t is now derived from the macro
942 __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
943 hardcoded to double. This does not affect the ABI of any libraries
944 that are part of the GNU C Library, but may affect the ABI of other
945 libraries that use this type in their interfaces. The new definition
946 improves consistency with compiler behavior in many scenarios.
948 * A future version of glibc will stop loading shared objects from the
949 "tls" subdirectories on the library search path, the subdirectory that
950 corresponds to the AT_PLATFORM system name, and also stop employing
951 the legacy AT_HWCAP search mechanism. Applications should switch to
952 the new glibc-hwcaps mechanism instead; if they do not do that, only
953 the baseline version (directly from the search path directory) will be
956 Changes to build and runtime requirements:
958 * On Linux, the system administrator needs to configure /dev/pts with
959 the intended access modes for pseudo-terminals. glibc no longer
960 attemps to adjust permissions of terminal devices. The previous glibc
961 defaults ("tty" group, user read/write and group write) already
962 corresponded to what most systems used, so that grantpt did not
963 perform any adjustments.
965 * On Linux, the posix_openpt and getpt functions no longer attempt to
966 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
967 (and pseudo-terminals are supported), a devpts file system is mounted
968 on /dev/pts. Current systems already meet these requirements.
970 * s390x requires GCC 7.1 or newer. See gcc Bug 98269.
972 Security related changes:
974 CVE-2021-3326: An assertion failure during conversion from the
975 ISO-20220-JP-3 character set using the iconv function has been fixed.
976 This assertion was triggered by certain valid inputs in which the
977 converted output contains a combined sequence of two wide characters
978 crossing a buffer boundary. Reported by Tavis Ormandy.
980 CVE-2020-27618: An infinite loop has been fixed in the iconv program when
981 invoked with input containing redundant shift sequences in the IBM1364,
982 IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
984 CVE-2020-29562: An assertion failure has been fixed in the iconv function
985 when invoked with UCS4 input containing an invalid character.
987 CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
988 invoked with EUC-KR input containing invalid multibyte input sequences.
990 The following bugs are resolved with this release:
992 [10635] libc: realpath portability patches
993 [16124] dynamic-link: ld.so should allow to change argv[0]
994 [17924] malloc: 'free' should not set errno
995 [18683] libc: Linux faccessat implementation can incorrectly ignore
997 [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
998 [23091] hurd: missing waitid support
999 [23249] libc: Epyc and other current AMD CPUs do not select the
1000 "haswell" platform subdirectory
1001 [24080] dynamic-link: Definition of "haswell" platform is inconsistent
1003 [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
1005 [24941] libc: Make grantpt usable after multi-threaded fork in more
1007 [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
1008 [24973] locale: iconv encounters segmentation fault when converting
1009 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
1010 [25399] string: undefined reference to `__warn_memset_zero_len' when
1011 changing gnuc version
1012 [25859] libc: glibc parser for /sys/devices/system/cpu/online is
1014 [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
1016 [25971] libc: s390 bits/hwcap.h out of sync with kernel
1017 [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
1018 [26100] libc: Race in syslog(3) with regards to tag printing.
1019 [26124] libc: Export <cpu-features.h>
1020 [26130] nscd: Inconsistent nscd cache during pruning
1021 [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
1022 [26224] locale: iconv hangs when converting some invalid inputs from
1023 several IBM character sets (CVE-2020-27618)
1024 [26341] libc: realpath cyclically call __alloca(path_max) to consume
1025 too much stack space
1026 [26343] manual: invalid documented return type for strerrorname_np(),
1027 strerrordesc_np(), sigdescr_np(), sigabbrev_np()
1028 [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
1030 [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
1032 [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
1033 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
1035 [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
1036 [26553] libc: mtx_init allows type set to "mtx_recursive" only
1037 [26555] string: strerrorname_np does not return the documented value
1038 [26592] libc: pointer arithmetic overflows in realpath
1039 [26600] network: Transaction ID collisions cause slow DNS lookups in
1041 [26606] libc: [2.33 Regression] pselect is broken on x32
1042 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
1043 [26620] glob: fnmatch with collating symbols results in segmentation
1045 [26625] libc: [2.33 Regression] CET is disabled
1046 [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
1047 at the end of a memory mapping
1048 [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
1049 by the caller to the kernel
1050 [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
1051 [26647] build: [-Werror=array-parameter=] due to different
1052 declarations for __sigsetjmp
1053 [26648] libc: mkstemp is likely to fail on systems with non-stricly-
1055 [26649] stdio: printf should handle non-normal x86 long double numbers
1056 gracefully (CVE-2020-29573)
1057 [26686] build: -Warray-parameter instances building with GCC 11
1058 [26687] build: -Warray-bounds instances building with GCC 11
1059 [26690] stdio: Aliasing violation in __vfscanf_internal
1060 [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
1061 [26726] build: GCC warning calling new_composite_name with an array of
1063 [26736] libc: FAIL: misc/tst-sysvshm-linux
1064 [26737] libc: Random FAIL: rt/tst-shm
1065 [26791] libc: Missing O_CLOEXEC in sysconf.c
1066 [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
1068 [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
1070 [26818] string: aarch64: string tests may run ifunc variants that are
1072 [26821] libc: Memory leak test failures on Fedora 33
1073 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
1074 FSGSBASE/LM/RDRAND check failure
1075 [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
1077 [26853] libc: aarch64: Missing unwind information in statically linked
1079 [26923] locale: Assertion failure in iconv when converting invalid
1080 UCS4 (CVE-2020-29562)
1081 [26926] dynamic-link: aarch64: library dependencies are not bti
1083 [26932] libc: sh: Multiple floating point functions defined as stubs
1085 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
1087 [26988] dynamic-link: aarch64: BTI mprotect address is not page
1089 [27002] build: libc_freeres_fn build failure with GCC 11
1090 [27004] dynamic-link: ld.so is miscompiled by GCC 11
1091 [27008] dynamic-link: ld.so.cache should have endianness markup
1092 [27042] libc: [alpha] anonymous union in struct stat confuses
1094 [27053] libc: Conformance regression in system(3) (and probably also
1096 [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
1098 [27077] network: Do not reload /etc/nsswitch.conf from chroot
1099 [27083] libc: Unsafe unbounded alloca in addmntent
1100 [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
1102 [27130] string: "rep movsb" performance issue
1103 [27150] libc: alpha: wait4() is unavailable in static linking
1104 [27177] dynamic-link:
1105 GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
1107 [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
1108 [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
1109 [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
1110 related to combining characters (CVE-2021-3326)
1117 * Unicode 13.0.0 Support: Character encoding, character type info, and
1118 transliteration tables are all updated to Unicode 13.0.0, using
1119 generator scripts contributed by Mike FABIAN (Red Hat).
1121 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
1123 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
1124 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
1125 Three ABIs are supported:
1131 The arc* ABIs are little-endian while arceb is big-endian. All ABIs use
1132 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
1134 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
1135 DT_DEPAUDIT dynamic section entries of the main executable.
1137 * powerpc64le supports IEEE128 long double libm/libc redirects when
1138 using -mabi=ieeelongdouble to compile C code on supported GCC
1139 toolchains. It is recommended to use GCC 8 or newer when testing
1142 * To help detect buffer overflows and other out-of-bounds accesses
1143 several APIs have been annotated with GCC 'access' attribute. This
1144 should help GCC 10 issue better warnings.
1146 * On Linux, functions pthread_attr_setsigmask_np and
1147 pthread_attr_getsigmask_np have been added. They allow applications
1148 to specify the signal mask of a thread created with pthread_create.
1150 * The GNU C Library now provides the header file <sys/single_threaded.h>
1151 which declares the variable __libc_single_threaded. Applications are
1152 encouraged to use this variable for single-thread optimizations,
1153 instead of weak references to symbols historically defined in
1156 * The functions sigabbrev_np and sigdescr_np have been added. The
1157 sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for
1158 SIGHUP) while sigdescr_np returns a string describing the signal number
1159 (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
1160 attempt to translate the return description, both functions return
1161 NULL for an invalid signal number.
1163 They should be used instead of sys_siglist or sys_sigabbrev and they
1164 are both thread and async-signal safe. These functions are GNU extensions.
1166 * The functions strerrorname_np and strerrordesc_np have been added. The
1167 strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL)
1168 while strerrordesc_np returns a string describing the error number
1169 (e.g "Invalid argument" for EINVAL). Different than strerror,
1170 strerrordesc_np does not attempt to translate the return description, both
1171 functions return NULL for an invalid error number.
1173 They should be used instead of sys_errlist and sys_nerr, both are
1174 thread and async-signal safe. These functions are GNU extensions.
1176 * AArch64 now supports standard branch protection security hardening
1177 in glibc when it is built with a GCC that is configured with
1178 --enable-standard-branch-protection (or if -mbranch-protection=standard
1179 flag is passed when building both GCC target libraries and glibc,
1180 in either case a custom GCC is needed). This includes branch target
1181 identification (BTI) and pointer authentication for return addresses
1182 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
1183 extensions respectively for the protection to be effective,
1184 otherwise the used instructions are nops. User code can use PAC-RET
1185 without libc support, but BTI requires a libc that is built with BTI
1186 support, otherwise runtime objects linked into user code will not be
1189 Deprecated and removed features, and other changes affecting compatibility:
1191 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
1192 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
1193 RPC header files. Backward compatibility for old programs is kept
1194 only for architectures and ABIs that have been added in or before
1195 glibc 2.31. New programs need to use TI-RPC
1196 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
1197 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
1199 * Remove configure option --enable-obsolete-nsl. libnsl is only built
1200 as shared library for backward compatibility and the NSS modules "nis"
1201 and "nisplus" are not built at all and libnsl's headers aren't
1202 installed. This compatibility is kept only for architectures and ABIs
1203 that have been added in or before version 2.28. Replacement
1204 implementations based on TI-RPC, which additionally support IPv6, are
1205 available from <https://github.com/thkukuk/>. This change does not
1206 affect the "compat" NSS module, which does not depend on libnsl
1207 since 2.27 and thus can be used without NIS.
1209 * The deprecated <sys/sysctl.h> header and the sysctl function have been
1210 removed. To support old binaries, the sysctl function continues to
1211 exist as a compatibility symbol (on those architectures which had it),
1212 but always fails with ENOSYS. This reflects the removal of the system
1213 call from all architectures, starting with Linux 5.5.
1215 * The sstk function is no longer available to newly linked binaries.
1216 Its implementation always returned with a failure, and the function
1217 was not declared in any header file.
1219 * The legacy signal handling functions siginterrupt, sigpause, sighold,
1220 sigrelse, sigignore and sigset, and the sigmask macro have been
1221 deprecated. Applications should use the sigsuspend, sigprocmask and
1222 sigaction functions instead.
1224 * ldconfig now defaults to the new format for ld.so.cache. glibc has
1225 already supported this format for almost 20 years.
1227 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
1228 are no longer available to newly linked binaries, and their declarations
1229 have been removed from <string.h>. They are exported solely as
1230 compatibility symbols to support old binaries. All programs should use
1233 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
1234 are no longer available to newly linked binaries, and their declarations
1235 have been removed from <stdio.h>. They are exported solely as
1236 compatibility symbols to support old binaries. All programs should use
1237 strerror or strerror_r instead.
1239 * Both strerror and strerror_l now share the same internal buffer in the
1240 calling thread, meaning that the returned string pointer may be invalided
1241 or contents might be overwritten on subsequent calls in the same thread or
1242 if the thread is terminated. It makes strerror MT-safe.
1244 * Using weak references to libpthread functions such as pthread_create
1245 or pthread_key_create to detect the singled-threaded nature of a
1246 program is an obsolescent feature. Future versions of glibc will
1247 define pthread_create within libc.so.6 itself, so such checks will
1248 always flag the program as multi-threaded. Applications should check
1249 the __libc_single_threaded variable declared in
1250 <sys/single_threaded.h> instead.
1252 * The "files" NSS module no longer supports the "key" database (used for
1253 secure RPC). The contents of the /etc/publickey file will be ignored,
1254 regardless of the settings in /etc/nsswitch.conf. (This method of
1255 storing RPC keys only supported the obsolete and insecure AUTH_DES
1256 flavor of secure RPC.)
1258 * The __morecore and __after_morecore_hook malloc hooks and the default
1259 implementation __default_morecore have been deprecated. Applications
1260 should use malloc interposition to change malloc behavior, and mmap to
1261 allocate anonymous memory. A future version of glibc may require that
1262 applications which use the malloc hooks must preload a special shared
1263 object, to enable the hooks.
1265 * The hesiod NSS module has been deprecated and will be removed in a
1266 future version of glibc. System administrators are encouraged to
1267 switch to other approaches for networked account databases, such as
1270 Changes to build and runtime requirements:
1272 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
1273 long double redirects.
1275 Security related changes:
1277 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
1278 invoked with the -c option and when processing invalid multi-byte input
1279 sequences. Reported by Jan Engelhardt.
1281 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
1282 corruption when they were passed a pseudo-zero argument. Reported by Guido
1283 Vranken / ForAllSecure Mayhem.
1285 CVE-2020-1752: A use-after-free vulnerability in the glob function when
1286 expanding ~user has been fixed.
1288 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
1289 memmove functions has been fixed. Discovered by Jason Royes and Samual
1290 Dytrych of the Cisco Security Assessment and Penetration Team (See
1293 The following bugs are resolved with this release:
1295 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
1296 [10441] manual: Backtraces code example lacks error checking
1297 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
1298 timer_sigev_thread dangerous
1299 [14231] stdio: stdio-common tests memory requirements
1300 [14578] libc: /proc-based emulation for lchmod, fchmodat
1301 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
1302 filtee has constructor
1303 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
1304 sequences (CVE-2016-10228)
1305 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
1306 character entities for infinity & pi
1307 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
1308 segfaults in applications
1309 [20543] libc: Please move from .gnu.linkonce to comdat
1310 [22489] network: gcc warns about implicit convertion in
1311 ICMP6_FILTER_SETPASS with -Wsign-conversion
1312 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
1313 [23294] math: Complex _FloatN functions are redirected to the wrong
1314 function with -mlong-double-64
1315 [23296] libc: Data race in setting function descriptor during lazy
1317 [23668] dynamic-link: ldconfig: Default to the new format for
1319 [23819] hurd: hurd: Add C11 thread support
1320 [23990] build: test-container error out on failure to exec child.
1321 [23991] build: shell-container typo in run_command_array
1322 [24638] manual: Error in example of parsing a template string
1323 [24654] manual: Wrong declaration of wcschr in libc manual
1324 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
1326 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
1327 dynamically loaded dsos
1328 [25098] nptl: nptl: ctype classification functions are not AS-Safe
1329 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
1331 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
1332 restore EAX, ECX and EDX
1333 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
1334 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
1335 [25420] network: Race condition in resolv_conf.c can result in caching
1336 stale configuration forever
1337 [25487] math: sinl() stack corruption from crafted input
1339 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
1341 [25523] libc: MIPS/Linux inline syscall template is miscompiled
1342 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
1344 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
1345 on 32 bit and old kernel
1346 [25635] libc: arm: Wrong sysdep order selection for soft-fp
1347 [25639] localedata: Some names of days and months wrongly spelt in
1349 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
1350 amount of sigset_t bytes
1351 [25691] stdio: printf: memory leak when printing long multibyte
1353 [25715] libc: system() returns wrong errors when posix_spawn fails
1354 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
1355 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
1356 state for conversions that produce two Unicode code points
1357 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
1358 for linux x86_64 leads to livelock
1359 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
1360 test failures, invalid instruction in ld.so
1361 [25790] glob: Typo in tst-fnmatch.input
1362 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
1364 [25819] localedata: Update locale data to Unicode 13.0.0
1365 [25824] libc: Abnormal function of strnlen in aarch64
1366 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
1367 [25896] libc: Incorrect prctl
1368 [25902] libc: Bad LOADARGS_N
1369 [25905] dynamic-link: VSX registers are corrupted during PLT
1370 resolution when glibc is built with --disable-multi-arch and --with-
1372 [25933] string: Off by one error in __strncmp_avx2 when
1373 length=VEC_SIZE*4 and strings are at page boundaries can cause a
1375 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
1376 exiting detached thread
1377 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
1379 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
1381 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
1382 [26073] math: getpayload() has wrong return value
1383 [26076] dynamic-link: dlmopen crashes after failing to load
1384 dependencies in audit mode
1385 [26120] localedata: column width of of some Korean
1386 JUNGSEONG/JONGSEONG characters wrong (should be 0)
1387 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
1388 [26133] libc: Incorrect need_arch_feature_F16C
1389 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
1391 [26149] libc: PKU is usable only if OSPKE is set
1392 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
1394 [26208] libc: Incorrect bit_cpu_CLFSH
1395 [26210] network: Incorrect use of hidden symbols for global sunrpc
1397 [26211] stdio: printf integer overflow calculating allocation size
1398 [26214] stdio: printf_fp double free
1399 [26215] stdio: printf_fp memory leak
1400 [26232] time: FAIL: support/tst-timespec for 32-bit targets
1401 [26258] nss: nss_compat should not read input files with mmap
1402 [26332] string: Incorrect cache line size load causes memory
1403 corruption in memset
1410 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
1411 enable features from the draft ISO C2X standard. Only some features from
1412 this draft standard are supported by the GNU C Library, and as the draft
1413 is under active development, the set of features enabled by this macro is
1414 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
1415 by compiling with "gcc -std=gnu2x".
1417 * The <math.h> functions that round their results to a narrower type now
1418 have corresponding type-generic macros in <tgmath.h>, as defined in TS
1419 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
1420 Clarification Request 13 to TS 18661-3.
1422 * The function pthread_clockjoin_np has been added, enabling join with a
1423 terminated thread with a specific clock. It allows waiting against
1424 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
1426 * New locale added: mnw_MM (Mon language spoken in Myanmar).
1428 * The DNS stub resolver will optionally send the AD (authenticated data) bit
1429 in queries if the trust-ad option is set via the options directive in
1430 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
1431 mode, the AD bit, as provided by the name server, is available to
1432 applications which call res_search and related functions. In the default
1433 mode, the AD bit is not set in queries, and it is automatically cleared in
1434 responses, indicating a lack of DNSSEC validation. (Therefore, the name
1435 servers and the network path to them are treated as untrusted.)
1437 Deprecated and removed features, and other changes affecting compatibility:
1439 * The totalorder and totalordermag functions, and the corresponding
1440 functions for other floating-point types, now take pointer arguments to
1441 avoid signaling NaNs possibly being converted to quiet NaNs in argument
1442 passing. This is in accordance with the resolution of Clarification
1443 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
1444 floating-point arguments directly will continue to work.
1446 * The obsolete function stime is no longer available to newly linked
1447 binaries, and its declaration has been removed from <time.h>.
1448 Programs that set the system time should use clock_settime instead.
1450 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
1451 in a future version of glibc. In this release, the header still exists
1452 but calling ftime will cause a compiler warning. All programs should use
1453 gettimeofday or clock_gettime instead.
1455 * The gettimeofday function no longer reports information about a
1456 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
1457 many years, as it cannot handle the full complexity of the world's
1458 timezones, but hitherto we have supported it on a best-effort basis.
1459 Changes required to support 64-bit time_t on 32-bit architectures have
1460 made this no longer practical.
1462 As of this release, callers of gettimeofday with a non-null 'tzp' argument
1463 should expect to receive a 'struct timezone' whose tz_minuteswest and
1464 tz_dsttime fields are zero. (For efficiency reasons, this does not always
1465 happen on a few Linux-based ports. This will be corrected in a future
1468 All callers should supply a null pointer for the 'tzp' argument to
1469 gettimeofday. For accurate information about the time zone associated
1470 with the current time, use the localtime function.
1472 gettimeofday itself is obsolescent according to POSIX. We have no plans
1473 to remove access to this function, but portable programs should consider
1474 using clock_gettime instead.
1476 * The settimeofday function can still be used to set a system-wide time
1477 zone when the operating system supports it. This is because the Linux
1478 kernel reused the API, on some architectures, to describe a system-wide
1479 time-zone-like offset between the software clock maintained by the kernel,
1480 and the "RTC" clock that keeps time when the system is shut down.
1482 However, to reduce the odds of this offset being set by accident,
1483 settimeofday can no longer be used to set the time and the offset
1484 simultaneously. If both of its two arguments are non-null, the call
1485 will fail (setting errno to EINVAL).
1487 Callers attempting to set this offset should also be prepared for the call
1488 to fail and set errno to ENOSYS; this already happens on the Hurd and on
1489 some Linux architectures. The Linux kernel maintainers are discussing a
1490 more principled replacement for the reused API. After a replacement
1491 becomes available, we will change settimeofday to fail with ENOSYS on all
1492 platforms when its 'tzp' argument is not a null pointer.
1494 settimeofday itself is obsolescent according to POSIX. Programs that set
1495 the system time should use clock_settime and/or the adjtime family of
1496 functions instead. We may cease to make settimeofday available to newly
1497 linked binaries after there is a replacement for Linux's time-zone-like
1500 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
1501 the optional CAS instruction is implemented (for instance, LEON processors
1502 are still supported, but SuperSPARC processors are not).
1504 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
1507 * If a lazy binding failure happens during dlopen, during the execution of
1508 an ELF constructor, the process is now terminated. Previously, the
1509 dynamic loader would return NULL from dlopen, with the lazy binding error
1510 captured in a dlerror message. In general, this is unsafe because
1511 resetting the stack in an arbitrary function call is not possible.
1513 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
1514 executable stack unless explicitly configured at build time to require
1515 minimum kernel version 4.8 or newer. This is because executing
1516 floating-point branches on a non-executable stack on Linux kernels prior to
1517 4.8 can lead to application crashes for some MIPS configurations. While
1518 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
1519 expected to enable non-executable stack by default with PT_GNU_STACK by
1520 default and is thus likely to trigger a crash on older kernels.
1522 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
1523 non-executable stack while dropping support for older kernels.
1525 * System call wrappers for time system calls now use the new time64 system
1526 calls when available. On 32-bit targets, these wrappers attempt to call
1527 the new system calls first and fall back to the older 32-bit time system
1528 calls if they are not present. This may cause issues in environments
1529 that cannot handle unsupported system calls gracefully by returning
1530 -ENOSYS. Seccomp sandboxes are affected by this issue.
1532 Changes to build and runtime requirements:
1534 * It is no longer necessary to have recent Linux kernel headers to build
1535 working (non-stub) system call wrappers on all architectures except 64-bit
1536 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
1538 * The ChangeLog file is no longer present in the toplevel directory of the
1539 source tree. ChangeLog files are located in the ChangeLog.old directory as
1540 ChangeLog.N where the highest N has the latest entries.
1542 Security related changes:
1544 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
1545 out-of-bounds write when executed in a signal frame context.
1547 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
1548 environment variable during program execution after a security
1549 transition, allowing local attackers to restrict the possible mapping
1550 addresses for loaded libraries and thus bypass ASLR for a setuid
1551 program. Reported by Marcin Kościelnicki.
1553 The following bugs are resolved with this release:
1555 [12031] localedata: iconv -t ascii//translit with Greek characters
1556 [15813] libc: Multiple issues in __gen_tempname
1557 [17726] libc: [arm, sparc] profil_counter should be compat symbol
1558 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
1559 [19767] libc: vdso is not used with static linking
1560 [19903] hurd: Shared mappings not being inherited by children processes
1561 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
1562 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
1564 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
1565 Symbols-A/B Unicode blocks
1566 [23518] libc: Eliminate __libc_utmp_jump_table
1567 [24026] malloc: malloc_info() returns wrong numbers
1568 [24054] localedata: Many locales are missing date_fmt
1569 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
1570 [24304] dynamic-link: Lazy binding failure during ELF
1571 constructors/destructors is not fatal
1572 [24376] libc: RISC-V symbol size confusion with _start
1573 [24682] localedata: zh_CN first weekday should be Monday per GB/T
1575 [24824] libc: test-in-container does not install charmap files compatible
1577 [24844] regex: regex bad pointer / leakage if malloc fails
1578 [24867] malloc: Unintended malloc_info formatting changes
1579 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
1580 [24880] libc: login: utmp implementation uses struct flock with fcntl64
1581 [24882] libc: login: pututline uses potentially outdated cache
1582 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
1583 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
1585 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
1587 [24930] dynamic-link: dlopen of PIE executable can result in
1588 _dl_allocate_tls_init assertion failure
1589 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
1590 (stringop-overflow error)
1591 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
1592 functions other can lead to crashes
1593 [24967] libc: jemalloc static linking causes runtime failure
1594 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
1596 [25035] libc: sbrk() failure handled poorly in tunables_strdup
1597 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
1598 [25097] libc: new -Warray-bounds with GCC 10
1599 [25112] dynamic-link: dlopen must not make new objects accessible when it
1600 still can fail with an error
1601 [25139] localedata: Please add the new mnw_MM locale
1602 [25149] regex: Array bounds violation in proceed_next_node
1603 [25157] dynamic-link: Audit cookie for the dynamic loader is not
1604 initialized correctly
1605 [25189] libc: glibc's __glibc_has_include causes issues with clang
1607 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
1608 value to an unsigned
1609 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
1610 binaries (CVE-2019-19126)
1611 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
1613 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
1615 [25232] string: <string.h> does not enable const correctness for strchr et
1617 [25233] localedata: Consider "." as the thousands separator for sl_SI
1619 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
1620 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
1621 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
1623 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
1624 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
1626 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
1627 (dl_initfirst) link map pointer
1628 [25401] malloc: pvalloc must not have __attribute_alloc_size__
1629 [25423] libc: Array overflow in backtrace on powerpc
1630 [25425] network: Missing call to __resolv_context_put in
1631 getaddrinfo.c:gethosts
1638 * Unicode 12.1.0 Support: Character encoding, character type info, and
1639 transliteration tables are all updated to Unicode 12.1.0, using
1640 generator scripts contributed by Mike FABIAN (Red Hat).
1642 * The dynamic linker accepts the --preload argument to preload shared
1643 objects, in addition to the LD_PRELOAD environment variable.
1645 * The twalk_r function has been added. It is similar to the existing
1646 twalk function, but it passes an additional caller-supplied argument
1647 to the callback function.
1649 * On Linux, the getdents64, gettid, and tgkill functions have been added.
1651 * Minguo (Republic of China) calendar support has been added as an
1652 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
1655 * The entry for the new Japanese era has been added for ja_JP locale.
1657 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
1658 pvalloc, memalign, and posix_memalign fail now with total object size
1659 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
1660 pointer subtraction within the allocated object, where results might
1661 overflow the ptrdiff_t type.
1663 * The dynamic linker no longer refuses to load objects which reference
1664 versioned symbols whose implementation has moved to a different soname
1665 since the object has been linked. The old error message, symbol
1666 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
1667 link time reference, is gone.
1669 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
1670 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
1671 functions. These behave similarly to their "timed" equivalents, but also
1672 accept a clockid_t parameter to determine which clock their timeout should
1673 be measured against. All functions allow waiting against CLOCK_MONOTONIC
1674 and CLOCK_REALTIME. The decision of which clock to be used is made at the
1675 time of the wait (unlike with pthread_condattr_setclock, which requires
1676 the clock choice at initialization time).
1678 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
1679 work, new resolvers can use a second argument which can be extended in
1680 the future, currently it contains the AT_HWCAP2 value.
1682 Deprecated and removed features, and other changes affecting compatibility:
1684 * The copy_file_range function fails with ENOSYS if the kernel does not
1685 support the system call of the same name. Previously, user space
1686 emulation was performed, but its behavior did not match the kernel
1687 behavior, which was deemed too confusing. Applications which use the
1688 copy_file_range function can no longer rely on glibc to provide a fallback
1689 on kernels that do not support the copy_file_range system call, and if
1690 this function returns ENOSYS, they will need to use their own fallback.
1691 Support for copy_file_range for most architectures was added in version
1692 4.5 of the mainline Linux kernel.
1694 * The functions clock_gettime, clock_getres, clock_settime,
1695 clock_getcpuclockid, clock_nanosleep were removed from the librt library
1696 for new applications (on architectures which had them). Instead, the
1697 definitions in libc will be used automatically, which have been available
1700 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
1701 and <sys/stropts.h> have been removed.
1703 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
1704 resolver flag (deprecated in glibc 2.25) have been removed.
1706 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
1707 resolver have been removed from <resolv.h>.
1709 * With --enable-bind-now, installed programs are now linked with the
1712 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
1713 configurations) has been removed, following the deprecation of this
1714 subarchitecture in version 8 of GCC, and its removal in version 9.
1716 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
1717 header have been removed.
1719 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
1720 deprecated and will be removed from a future version of glibc.
1721 Application should directly access /proc instead. For obtaining random
1722 bits, the getentropy function can be used.
1724 Changes to build and runtime requirements:
1726 * GCC 6.2 or later is required to build the GNU C Library.
1728 Older GCC versions and non-GNU compilers are still supported when
1729 compiling programs that use the GNU C Library.
1731 Security related changes:
1733 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
1734 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
1735 has undefined behavior. On x32, the size_t argument may be passed
1736 in the lower 32 bits of the 64-bit RDX register with non-zero upper
1737 32 bits. When it happened with the sign bit of RDX register set,
1738 memcmp gave the wrong result since it treated the size argument as
1739 zero. Reported by H.J. Lu.
1741 CVE-2019-9169: Attempted case-insensitive regular-expression match
1742 via proceed_next_node in posix/regexec.c leads to heap-based buffer
1743 over-read. Reported by Hongxu Chen.
1745 The following bugs are resolved with this release:
1747 [2872] locale: Transliteration Cyrillic -> ASCII fails
1748 [6399] libc: gettid() should have a wrapper
1749 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
1750 [16976] glob: fnmatch unbounded stack VLA for collating symbols
1751 [17396] localedata: globbing for locale by [[.collating-element.]]
1752 [18035] dynamic-link: pldd does no longer work, enters infinite loop
1753 [18465] malloc: memusagestat is built using system C library
1754 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
1755 invalid input drops valid char
1756 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
1757 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
1758 [21897] localedata: Afar locales: Fix mon, abmon, and abday
1759 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
1760 [23352] malloc: __malloc_check_init still defined in public header
1762 [23403] nptl: Wrong alignment of TLS variables
1763 [23501] libc: nftw() doesn't return dangling symlink's inode
1764 [23733] malloc: Check the count before calling tcache_get()
1765 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
1767 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
1768 [23844] nptl: pthread_rwlock_trywrlock results in hang
1769 [23983] argparse: Missing compat versions of argp_failure and argp_error
1770 for long double = double
1771 [23984] libc: Missing compat versions of err.h and error.h functions for
1772 long double = double
1773 [23996] localedata: Dutch salutations
1774 [24040] libc: riscv64: unterminated call chain in __thread_start
1775 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
1777 [24051] stdio: puts and putchar output to _IO_stdout instead of stdout
1778 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
1780 [24114] regex: regexec buffer read overrun in "grep -i
1781 '\(\(\)*.\)*\(\)\(\)\1'"
1782 [24122] libc: Segfaults if 0 returned from la_version
1783 [24153] stdio: Some input functions do not react to stdin assignment
1784 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
1785 RDX is set) (CVE-2019-7309)
1786 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
1787 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
1788 not the default "nor"
1789 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
1790 false positives, change to modern flexible array
1791 [24180] nptl: pthread_mutex_trylock does not use the correct order of
1792 instructions while maintaining the robust mutex list due to missing
1794 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
1795 unnecessary librt dependencies
1796 [24200] localedata: Revert first_weekday removal in en_IE locale
1797 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
1798 [24215] nptl: pthread_timedjoin_np should be a cancellation point
1799 [24216] malloc: Check for large bin list corruption when inserting
1801 [24228] stdio: old x86 applications that use legacy libio crash on exit
1802 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
1804 [24293] localedata: Missing Minguo calendar support for TW locales
1805 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
1806 tt_RU (Tatar) locale
1807 [24307] localedata: Update locale data to Unicode 12.0.0
1808 [24323] dynamic-link: dlopen should not be able open PIE objects
1809 [24335] build: "Obsolete types detected" with Linux 5.0 headers
1810 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
1811 tt_RU (Tatar) locale
1812 [24370] localedata: Add lang_name for tt_RU locale
1813 [24372] locale: Binary locale files are not architecture independent
1814 [24394] time: strptime %Ey mis-parses final year of era
1815 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
1817 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
1819 [24531] malloc: Malloc tunables give tcache assertion failures
1820 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
1822 [24535] localedata: Update locale data to Unicode 12.1.0
1823 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
1824 kernels and break testing
1825 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
1826 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
1827 [-Werror=format-overflow=]
1828 [24570] libc: alpha: compat msgctl uses __IPC_64
1829 [24584] locale: Data race in __wcsmbs_clone_conv
1830 [24588] stdio: Remove codecvt vtables from libio
1831 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
1833 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
1834 [24632] stdio: Old binaries which use freopen with default stdio handles
1836 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
1838 [24652] localedata: szl_PL spelling correction
1839 [24695] nss: nss_db: calling getpwent after endpwent crashes
1840 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
1841 in /etc/nsswitch.conf
1842 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
1843 [24740] libc: getdents64 type confusion
1844 [24741] dynamic-link: ld.so should not require that a versioned symbol is
1845 always implemented in the same library
1846 [24744] libc: Remove copy_file_range emulation
1847 [24757] malloc: memusagestat is linked against system libpthread
1848 [24794] libc: Partial test suite run builds corrupt test-in-container
1856 * The getcpu wrapper function has been added, which returns the currently
1857 used CPU and NUMA node. This function is Linux-specific.
1859 * A new convenience target has been added for distribution maintainers
1860 to build and install all locales as directories with files. The new
1861 target is run by issuing the following command in your build tree:
1862 'make localedata/install-locale-files', with an optional DESTDIR
1863 to set the install root if you wish to install into a non-default
1864 configured location.
1866 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
1868 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
1869 for _GNU_SOURCE, to match BSD environments.
1871 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
1872 indicates that it will abort the transaction prior to entering the kernel
1873 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
1874 suspended, and this caused some undefined side-effects issues by aborting
1875 transactions manually. Glibc avoided it by abort transactions manually on
1876 each syscall, but it lead to performance issues on newer kernels where the
1877 HTM state is saved and restore lazily (the state being saved even when the
1878 process actually does not use HTM).
1880 * The functions posix_spawn_file_actions_addchdir_np and
1881 posix_spawn_file_actions_addfchdir_np have been added, enabling
1882 posix_spawn and posix_spawnp to run the new process in a different
1883 directory. These functions are GNU extensions. The function
1884 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
1887 * The popen and system do not run atfork handlers anymore (BZ#17490).
1888 Although it is a possible POSIX violation, the POSIX rationale in
1889 pthread_atfork documentation regarding atfork handlers is to handle
1890 inconsistent mutex state after a fork call in a multi-threaded process.
1891 In both popen and system there is no direct access to user-defined mutexes.
1893 * Support for the C-SKY ABIV2 running on Linux has been added. This port
1894 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
1896 - C-SKY ABIV2 soft-float little-endian
1897 - C-SKY ABIV2 hard-float little-endian
1899 * strftime's default formatting of a locale's alternative year (%Ey)
1900 has been changed to zero-pad the year to a minimum of two digits,
1901 like "%y". This improves the display of Japanese era years during
1902 the first nine years of a new era, and is expected to be harmless
1903 for all other locales (only Japanese locales regularly have
1904 alternative year numbers less than 10). Zero-padding can be
1905 overridden with the '_' or '-' flags (which are GNU extensions).
1907 * As a GNU extension, the '_' and '-' flags can now be applied to
1908 "%EY" to control how the year number is formatted; they have the
1909 same effect that they would on "%Ey".
1911 Deprecated and removed features, and other changes affecting compatibility:
1913 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
1914 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
1916 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
1917 in <sys/procfs.h>, has been corrected to match the type actually used by
1918 the Linux kernel. This affects the size and layout of that structure on
1919 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
1921 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
1922 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
1923 defined in <sys/procfs.h>, has been corrected to match the type actually
1924 used by the Linux kernel. This affects the size and layout of those
1927 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
1928 meant to scan a string and allocate space for it with malloc, is now
1929 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
1930 defined. This extension conflicts with C99's use of '%a' to scan a
1931 hexadecimal floating-point number, which is now available to programs
1932 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
1934 POSIX.1-2008 includes the feature of allocating a buffer for string input
1935 with malloc, using the modifier letter 'm' instead. Programs using
1936 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
1937 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
1938 C99 '%a' no longer need to avoid _GNU_SOURCE.
1940 GCC's -Wformat warnings can detect most uses of this extension, as long
1941 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
1942 __attribute__ ((format (scanf, ...))).
1944 Changes to build and runtime requirements:
1946 * Python 3.4 or later is required to build the GNU C Library.
1948 * On most architectures, GCC 5 or later is required to build the GNU C
1949 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
1951 Older GCC versions and non-GNU compilers are still supported when
1952 compiling programs that use the GNU C Library.
1954 Security related changes:
1956 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
1957 denial of service due to resource exhaustion when processing getaddrinfo
1958 calls with crafted host names. Reported by Guido Vranken.
1960 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
1961 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
1962 happened, accessing the 32-bit size_t value as the full 64-bit register
1963 in the assembly string/memory functions would cause a buffer overflow.
1964 Reported by H.J. Lu.
1966 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
1967 addresses with arbitrary trailing characters, potentially leading to data
1968 or command injection issues in applications.
1970 The following bugs are resolved with this release:
1972 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
1973 [10496] localedata: 12h time representation in multiple locales faulty
1974 [10797] localedata: it_IT locale numeric does not have a separator for
1976 [11319] libc: dprintf doesn't handle errors properly
1977 [16346] time: mktime: potentially unsafe use of localtime_offset
1978 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
1980 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
1981 posix_spawn_file_actions_addfchdir_np
1982 [17426] localedata: Indian locales: set the correct date format
1983 [17490] stdio: popen should not invoke atfork handlers
1984 [17783] libc: TIOCSER_TEMT conditions inconsistent
1985 [18040] regex: use-after-free in regexec/get_subexp
1986 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
1987 [20018] network: getaddrinfo should reject IP addresses with trailing
1988 characters (CVE-2016-10739)
1989 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
1990 [20271] libc: Missing "\n" in __libc_fatal calls
1991 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
1992 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
1993 pointer argument is non-NULL
1994 [21037] stdio: open_memstream and freopen
1995 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
1996 [21716] time: Crash in glibc's mktime in low-memory situations
1997 [22834] stdio: Subprocess forked by popen may crash in Linux when
1998 multithreads call popen
1999 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
2000 and pthread_create fails.
2001 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
2002 [23125] libc: riscv64: endless loop when throwing an exception from a
2004 [23275] nptl: Race in pthread_mutex_lock while promoting to
2005 PTHREAD_MUTEX_ELISION_NP.
2006 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
2008 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
2010 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
2012 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
2013 [23509] dynamic-link: CET enabled glibc is incompatible with the older
2015 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
2016 [23521] nss: get_next_alias nss_files file stream leak
2017 [23538] nptl: Hang in pthread_cond_broadcast
2018 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
2019 [23578] regex: Invalid memory access if regex pattern contains NUL byte
2020 [23579] libc: Errors misreported in preadv2
2021 [23597] build: support/test-container.c doesn't work with different
2023 [23603] time: mktime signed integer overflow on large timestamps
2024 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
2025 [23614] libc: powerpc: missing CFI register information in __mpn_*
2027 [23637] string: Generic strstr/strcasestr fails with huge needles
2028 [23640] libc: no way to easily clear FD_CLOEXEC in
2029 posix_spawn_file_actions_adddup2()
2030 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
2032 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
2034 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
2035 [23689] libc: Bug in documentation for rusage.ru_ixrss in
2036 bits/types/struct_rusage.h
2037 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
2039 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
2041 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
2042 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
2043 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
2045 [23724] localedata: Albanian date formats are incorrect
2046 [23735] math: libnldbl_nonshared.a references internal libm symbols
2047 [23740] localedata: kl_GL: Month names and date formats need update
2048 [23744] regex: regex refactorings to remove BE, avoid duplication
2049 [23745] time: mktime fix for Gnulib + coreutils
2050 [23758] time: Improve the width of alternate representation for year in
2052 [23783] libc: [mips] Missing CMSPAR bits/termios.h
2053 [23789] time: mktime does not set errno on failure
2054 [23791] localedata: Wrong monetary format for ca_ES locale
2055 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
2056 [23794] locale: c16rtomb does not handle surrogate pairs
2057 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
2058 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
2059 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
2060 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
2061 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
2062 [23862] libc: [sh] missing kernel-features.h undefines
2063 [23864] libc: [riscv] missing kernel-features.h undefines
2064 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
2065 [23907] malloc: Incorrect double-free malloc tcache check disregards
2067 [23913] libc: off-by-one in function maybe_script_execute in
2068 sysdeps/posix/spawni.c
2069 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
2070 [23923] locale: Add --no-hard-links option to localedef
2071 [23927] network: Linux if_nametoindex() does not close descriptor
2073 [23961] math: powf can overflow to inf without setting errno in non-
2074 nearest rounding mode
2075 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
2076 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
2077 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
2078 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
2079 [24011] localedata: Fixed small type in comment for locale bs_BA
2080 [24018] libc: gettext() may return NULL
2081 [24022] build: riscv build failure with Linux kernel 4.20-rc7
2082 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
2083 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
2085 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
2086 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
2088 [24046] localedata: en_US locale doesn't define date_fmt
2089 [24063] manual: @var{errno} should be @code{errno}
2090 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
2091 [24088] libc: VSCR field is not being correctly read in ucontext_t on
2093 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
2095 [24097] string: Can't use 64-bit register for size_t in assembly codes for
2097 [24110] hurd: SS_DISABLE never set in stack_t value returned by
2099 [24112] network: Do not send DNS queries for non-host names (where all
2100 answers will be rejected)
2101 [24130] libc: alpha __remqu corrupts $f3 register
2108 * The localization data for ISO 14651 is updated to match the 2016
2109 Edition 4 release of the standard, this matches data provided by
2110 Unicode 9.0.0. This update introduces significant improvements to the
2111 collation of Unicode characters. This release deviates slightly from
2112 the standard in that the collation element ordering for lowercase and
2113 uppercase LATIN script characters is adjusted to ensure that regular
2114 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
2115 is not matched by [a-z]. With the update many locales have been
2116 updated to take advantage of the new collation information. The new
2117 collation information has increased the size of the compiled locale
2118 archive or binary locales.
2120 * The GNU C Library can now be compiled with support for Intel CET, AKA
2121 Intel Control-flow Enforcement Technology. When the library is built
2122 with --enable-cet, the resulting glibc is protected with indirect
2123 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
2124 compatible with all existing executables and shared libraries. This
2125 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
2126 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
2127 capable of multi-byte NOPs, like x86-64 processors as well as Intel
2128 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
2129 x86_64 and x32 on non-CET processors. --enable-cet has been tested
2130 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
2133 * The GNU C Library now has correct support for ABSOLUTE symbols
2134 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
2135 relocated incorrectly or in some cases discarded. The GNU linker can
2136 make use of the newer semantics, but it must communicate it to the
2137 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
2138 field) to indicate such support is required.
2140 * Unicode 11.0.0 Support: Character encoding, character type info, and
2141 transliteration tables are all updated to Unicode 11.0.0, using
2142 generator scripts contributed by Mike FABIAN (Red Hat).
2144 * <math.h> functions that round their results to a narrower type are added
2145 from TS 18661-1:2014 and TS 18661-3:2015:
2147 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
2148 fMxaddfNx functions.
2150 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
2151 fMxsubfNx functions.
2153 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
2154 fMxmulfNx functions.
2156 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
2157 fMxdivfNx functions.
2159 * Two grammatical forms of month names are now supported for the following
2160 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
2161 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
2162 support two grammatical forms in abbreviated month names: Catalan, Greek,
2165 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
2166 include the support for two grammatical forms of month names.
2168 * Building and running on GNU/Hurd systems now works without out-of-tree
2171 * The renameat2 function has been added, a variant of the renameat function
2172 which has a flags argument. If the flags are zero, the renameat2 function
2173 acts like renameat. If the flag is not zero and there is no kernel
2174 support for renameat2, the function will fail with an errno value of
2175 EINVAL. This is different from the existing gnulib function renameatu,
2176 which performs a plain rename operation in case of a RENAME_NOREPLACE
2177 flags and a non-existing destination (and therefore has a race condition
2178 that can clobber the destination inadvertently).
2180 * The statx function has been added, a variant of the fstatat64
2181 function with an additional flags argument. If there is no direct
2182 kernel support for statx, glibc provides basic stat support based on
2183 the fstatat64 function.
2185 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
2186 library if installed. libidn2 version 2.0.5 or later is recommended. If
2187 libidn2 is not available, internationalized domain names are not encoded
2188 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
2189 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
2190 with an encoding error.) Flags which used to change the IDN encoding and
2191 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
2192 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
2193 deprecated. They no longer have any effect.
2195 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
2196 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
2197 range of ELF gABI expressions including such constructs as
2198 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
2199 have been further restricted, and where in the past a dynamic string
2200 token sequence may have been interpreted as a literal string it will
2201 now cause a load failure. These load failures were always considered
2202 unspecified behaviour from the perspective of the dynamic loader, and
2203 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
2204 results in a load failure now.
2206 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
2207 implementation includes all the standard functions provided by
2210 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
2211 thrd_detach, thrd_exit, and thrd_join for thread management.
2213 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
2214 mtx_destroy for mutual exclusion.
2216 - call_once for function call synchronization.
2218 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
2219 cnd_wait for conditional variables.
2221 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
2223 Application developers must link against libpthread to use ISO C threads.
2225 Deprecated and removed features, and other changes affecting compatibility:
2227 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
2228 installed. Software that was using either header should be updated to
2229 use standard <stdio.h> interfaces instead.
2231 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
2232 This was never required by the C standard, and the macros just expanded
2233 to call alternative names for the same functions. If you hoped getc and
2234 putc would provide performance improvements over fgetc and fputc, instead
2235 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
2236 necessary, flockfile and funlockfile.
2238 * All stdio functions now treat end-of-file as a sticky condition. If you
2239 read from a file until EOF, and then the file is enlarged by another
2240 process, you must call clearerr or another function with the same effect
2241 (e.g. fseek, rewind) before you can read the additional data. This
2242 corrects a longstanding C99 conformance bug. It is most likely to affect
2243 programs that use stdio to read interactive input from a terminal.
2246 * The macros 'major', 'minor', and 'makedev' are now only available from
2247 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
2248 headers that happen to include <sys/types.h>. These macros are rarely
2249 used, not part of POSIX nor XSI, and their names frequently collide with
2250 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
2251 further explanation.
2253 <sys/sysmacros.h> is a GNU extension. Portable programs that require
2254 these macros should first include <sys/types.h>, and then include
2255 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
2257 * The tilegx*-*-linux-gnu configurations are no longer supported.
2259 * The obsolete function ustat is no longer available to newly linked
2260 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
2261 function has been deprecated in favor of fstatfs and statfs.
2263 * The obsolete function nfsservctl is no longer available to newly linked
2264 binaries. This function was specific to systems using the Linux kernel
2265 and could not usefully be used with the GNU C Library on systems with
2266 version 3.1 or later of the Linux kernel.
2268 * The obsolete function name llseek is no longer available to newly linked
2269 binaries. This function was specific to systems using the Linux kernel
2270 and was not declared in a header. Programs should use the lseek64 name
2271 for this function instead.
2273 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
2274 getaddrinfo and getnameinfo functions have been deprecated. The behavior
2275 previously selected by them is now always enabled.
2277 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
2278 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
2279 restriction (rejecting '_' in host names, among other things) has been
2280 removed, for increased compatibility with non-IDN name resolution.
2282 * The fcntl function now have a Long File Support variant named fcntl64. It
2283 is added to fix some Linux Open File Description (OFD) locks usage on non
2284 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
2285 fcntl and LFS support is handled transparently. Also for Linux, the OFD
2286 locks act as a cancellation entrypoint.
2288 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
2289 ecb_crypt, and des_setparity are no longer available to newly linked
2290 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
2291 longer installed. These functions encrypted and decrypted data with the
2292 DES block cipher, which is no longer considered secure. Software that
2293 still uses these functions should switch to a modern cryptography library,
2296 * Reflecting the removal of the encrypt and setkey functions above, the
2297 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
2298 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
2301 * The obsolete function fcrypt is no longer available to newly linked
2302 binaries. It was just another name for the standard function crypt,
2303 and it has not appeared in any header file in many years.
2305 * We have tentative plans to hand off maintenance of the passphrase-hashing
2306 library, libcrypt, to a separate development project that will, we hope,
2307 keep up better with new passphrase-hashing algorithms. We will continue
2308 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
2309 'crypt_r' should not need to change at all; however, distributions will
2310 need to install <crypt.h> and libcrypt from a separate project.
2312 In this release, if the configure option --disable-crypt is used, glibc
2313 will not install <crypt.h> or libcrypt, making room for the separate
2314 project's versions of these files. The plan is to make this the default
2315 behavior in a future release.
2317 Changes to build and runtime requirements:
2319 GNU make 4.0 or later is now required to build glibc.
2321 Security related changes:
2323 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
2324 been fixed by removing the glibc-internal IDNA implementation and using
2325 the system-provided libidn2 library instead. Originally reported by Hanno
2326 Böck and Christian Weisgerber.
2328 CVE-2017-18269: An SSE2-based memmove implementation for the i386
2329 architecture could corrupt memory. Reported by Max Horn.
2331 CVE-2018-11236: Very long pathname arguments to realpath function could
2332 result in an integer overflow and buffer overflow. Reported by Alexey
2335 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
2336 architecture could write beyond the target buffer, resulting in a buffer
2337 overflow. Reported by Andreas Schwab.
2339 The following bugs are resolved with this release:
2341 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
2342 [6889] manual: 'PWD' mentioned but not specified
2343 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
2344 when __WORDSIZE != 64
2345 [13762] regex: re_search etc. should return -2 on memory exhaustion
2346 [13888] build: /tmp usage during testing
2347 [13932] math: dbl-64 pow unexpectedly slow for some inputs
2348 [14092] nptl: Support C11 threads
2349 [14095] localedata: Review / update collation data from Unicode / ISO
2351 [14508] libc: -Wformat warnings
2352 [14553] libc: Namespace pollution loff_t in sys/types.h
2353 [14890] libc: Make NT_PRFPREG canonical.
2354 [15105] libc: Extra PLT references with -Os
2355 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
2357 [16335] manual: Feature test macro documentation incomplete and out of
2359 [16552] libc: Unify umount implementations in terms of umount2
2360 [17082] libc: htons et al.: statement-expressions prevent use on global
2361 scope with -O1 and higher
2362 [17343] libc: Signed integer overflow in /stdlib/random_r.c
2363 [17438] localedata: pt_BR: wrong d_fmt delimiter
2364 [17662] libc: please implement binding for the new renameat2 syscall
2365 [17721] libc: __restrict defined as /* Ignore */ even in c11
2366 [17979] libc: inconsistency between uchar.h and stdint.h
2367 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
2368 [18023] libc: extend_alloca is broken (questionable pointer comparison,
2369 horrible machine code)
2370 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
2372 [18471] libc: llseek should be a compat symbol
2373 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
2375 [18991] nss: nss_files skips large entry in database
2376 [19239] libc: Including stdlib.h ends up with macros major and minor being
2378 [19463] libc: linknamespace failures when compiled with -Os
2379 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
2380 [19527] locale: Normalized charset name not recognized by setlocale
2381 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
2382 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
2384 [19728] network: out of bounds stack read in libidn function
2385 idna_to_ascii_4i (CVE-2016-6261)
2386 [19729] network: out of bounds heap read on invalid utf-8 inputs in
2387 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
2388 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
2390 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
2391 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
2392 [20419] dynamic-link: files with large allocated notes crash in
2394 [20530] libc: bswap_16 should use __builtin_bswap16() when available
2395 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
2396 [20980] manual: CFLAGS environment variable replaces vital options
2397 [21163] regex: Assertion failure in pop_fail_stack when executing a
2398 malformed regexp (CVE-2015-8985)
2399 [21234] manual: use of CFLAGS makes glibc detect no optimization
2400 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
2401 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
2402 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
2403 [21508] locale: intl/tst-gettext failure with latest msgfmt
2404 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
2405 [21812] network: getifaddrs() returns entries with ifa_name == NULL
2406 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
2408 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
2410 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
2411 [22247] network: Integer overflow in the decode_digit function in
2412 puny_decode.c in libidn (CVE-2017-14062)
2413 [22342] nscd: NSCD not properly caching netgroup
2414 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
2415 [22550] localedata: es_ES locale (and other es_* locales): collation
2416 should treat ñ as a primary different character, sync the collation
2417 for Spanish with CLDR
2418 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
2419 by gcc configured with --enable-default-pie
2420 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
2421 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
2422 crossing 2GB threshold (CVE-2017-18269)
2423 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
2425 [22735] time: Misleading typo in time.h source comment regarding
2427 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
2428 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
2429 `__assert_perror_fail ()' to `__assert_fail_base ()'
2430 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
2432 [22786] libc: Stack buffer overflow in realpath() if input size is close
2433 to SSIZE_MAX (CVE-2018-11236)
2434 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
2435 through an absolute DT_NEEDED path
2436 [22792] build: tcb-offsets.h dependency dropped
2437 [22797] libc: pkey_get() uses non-reserved name of argument
2438 [22807] libc: PTRACE_* constants missing for powerpc
2439 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
2440 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
2441 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
2442 [22848] localedata: ca_ES: update date definitions from CLDR
2443 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
2444 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
2445 [22896] localedata: Update locale data for an_ES
2446 [22902] math: float128 test failures with GCC 8
2447 [22918] libc: multiple common of `__nss_shadow_database'
2448 [22919] libc: sparc32: backtrace yields infinite backtrace with
2450 [22926] libc: FTBFS on powerpcspe
2451 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
2453 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
2454 [22947] libc: FAIL: misc/tst-preadvwritev2
2455 [22963] localedata: cs_CZ: Add alternative month names
2456 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
2457 [22996] localedata: change LC_PAPER to en_US in es_BO locale
2458 [22998] dynamic-link: execstack tests are disabled when SELinux is
2460 [23005] network: Crash in __res_context_send after memory allocation
2462 [23007] math: strtod cannot handle -nan
2463 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
2464 [23036] regex: regex equivalence class regression
2465 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
2466 [23069] libc: sigaction broken on riscv64-linux-gnu
2467 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
2468 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
2469 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
2470 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
2471 and libc build with -Os)
2472 [23140] localedata: More languages need two forms of month names
2473 [23145] libc: _init/_fini aren't marked as hidden
2474 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
2475 [23171] math: C++ iseqsig for long double converts arguments to double
2476 [23178] nscd: sudo will fail when it is run in concurrent with commands
2477 that changes /etc/passwd
2478 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
2480 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
2481 [23208] localedata: New locale - Lower Sorbian (dsb)
2482 [23233] regex: Memory leak in build_charclass_op function in file
2484 [23236] stdio: Harden function pointers in _IO_str_fields
2485 [23250] nptl: Offset of __private_ss differs from GCC
2486 [23253] math: tgamma test suite failures on i686 with -march=x86-64
2487 -mtune=generic -mfpmath=sse
2488 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
2490 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
2491 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
2493 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
2494 [23277] math: nan function should not have const attribute
2495 [23279] math: scanf and strtod wrong for some hex floating-point
2496 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
2498 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
2499 [23303] build: undefined reference to symbol
2500 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
2501 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
2503 [23313] stdio: libio vtables validation and standard file object
2505 [23329] libc: The __libc_freeres infrastructure is not properly run across
2507 [23349] libc: Various glibc headers no longer compatible with
2509 [23351] malloc: Remove unused code related to heap dumps and malloc
2511 [23363] stdio: stdio-common/tst-printf.c has non-free license
2512 [23396] regex: Regex equivalence regression in single-byte locales
2513 [23422] localedata: oc_FR: More updates of locale data
2514 [23442] build: New warning with GCC 8
2515 [23448] libc: Out of bounds access in IBM-1390 converter
2516 [23456] libc: Wrong index_cpu_LZCNT
2517 [23458] build: tst-get-cpu-features-static isn't added to tests
2518 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
2520 [23467] dynamic-link: x86/CET: A property note parser bug
2527 * The GNU C Library can now be compiled with support for building static
2528 PIE executables (See --enable-static-pie in INSTALL). These static PIE
2529 executables are like static executables but can be loaded at any address
2530 and provide additional security hardening benefits at the cost of some
2531 memory and performance. When the library is built with --enable-static-pie
2532 the resulting libc.a is usable with GCC 8 and above to create static PIE
2533 executables using the GCC option '-static-pie'. This feature is currently
2534 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
2535 aarch64 with binutils 2.30 or later.
2537 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
2538 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
2541 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
2543 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
2545 * In order to support faster and safer process termination the malloc API
2546 family of functions will no longer print a failure address and stack
2547 backtrace after detecting heap corruption. The goal is to minimize the
2548 amount of work done after corruption is detected and to avoid potential
2549 security issues in continued process execution. Reducing shutdown time
2550 leads to lower overall process restart latency, so there is benefit both
2551 from a security and performance perspective.
2553 * The abort function terminates the process immediately, without flushing
2554 stdio streams. Previous glibc versions used to flush streams, resulting
2555 in deadlocks and further data corruption. This change also affects
2556 process aborts as the result of assertion failures.
2558 * On platforms where long double has the IEEE binary128 format (aarch64,
2559 alpha, mips64, riscv, s390 and sparc), the math library now implements
2560 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
2561 These are the same interfaces added in version 2.26 for some platforms where
2562 this format is supported but is not the format of long double.
2564 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
2565 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
2566 implements interfaces for that type, as defined by ISO/IEC TS
2567 18661-3:2015. These are corresponding interfaces to those supported for
2570 * The math library now implements interfaces for the _Float32, _Float64 and
2571 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
2572 corresponding interfaces to those supported for _Float128.
2574 * glibc now implements the memfd_create and mlock2 functions on Linux.
2576 * Support for memory protection keys was added. The <sys/mman.h> header now
2577 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
2580 * The copy_file_range function was added.
2582 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
2584 * The ldconfig utility now processes `include' directives using the C/POSIX
2585 collation ordering. Previous glibc versions used locale-specific
2586 ordering, the change might break systems that relied on that.
2588 * Support for two grammatical forms of month names has been added.
2589 In a call to strftime, the "%B" and "%b" format specifiers will now
2590 produce the grammatical form required when the month is used as part
2591 of a complete date. New "%OB" and "%Ob" specifiers produce the form
2592 required when the month is named by itself. For instance, in Greek
2593 and in many Slavic and Baltic languages, "%B" will produce the month
2594 in genitive case, and "%OB" will produce the month in nominative case.
2596 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
2597 are all valid and will all accept any known form of month
2598 name---standalone or complete, abbreviated or full. In a call to
2599 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
2600 the strings used by "%B" and "%b", respectively. New query
2601 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
2602 used by "%OB" and "%Ob", respectively.
2604 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
2605 define the strings for %OB and %Ob, respectively; these have the
2606 same syntax as "mon" and "abmon". These arrays are optional; if they
2607 are not provided then they have the same content as "mon" and "abmon",
2610 These features are provided for locales which define "alt_mon" and/or
2611 "ab_alt_mon" in their locale source data. This release includes such
2612 alternative month name data for the following languages: Belarusian,
2613 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
2615 This feature is currently a GNU extension, but it is expected to
2616 be added to the next revision of POSIX, and it is also already
2617 available on some BSD-derived operating systems.
2619 This feature will cause existing statically compiled applications
2620 to fail to load locales and fall back to the builtin C/POSIX locales.
2621 See notes below for other changes affecting compatibility.
2623 * Support for the RISC-V ISA running on Linux has been added. This port
2624 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
2625 for the following ISA and ABI pairs:
2631 Deprecated and removed features, and other changes affecting compatibility:
2633 * Statically compiled applications attempting to load locales compiled for the
2634 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
2635 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
2636 support for two grammatical forms of the month names, also extends the locale
2637 data binary format. Static applications needing locale support must be
2638 recompiled to match the runtime and data they are deployed with. In some
2639 distributions there is an upgrade window where dynamically linked applications
2640 may use a new library but the old locale data and also fall back to the
2641 builtin C/POSIX locales; restarting the application process is sufficient to
2644 * Support for statically linked applications which call dlopen is deprecated
2645 and will be removed in a future version of glibc. Applications which call
2646 dlopen need to be linked dynamically instead.
2648 * Support for old programs which use internal stdio data structures and
2649 functions is deprecated. This includes programs which use the C++ streams
2650 provided by libstdc++ in GCC 2.95. Programs which use the internal
2651 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
2652 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
2653 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
2654 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
2655 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
2656 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
2657 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
2658 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
2659 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
2660 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
2661 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
2662 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
2663 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
2664 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
2665 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
2666 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
2667 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
2668 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
2669 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
2670 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
2671 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
2672 future version of glibc. Unlike other symbol removals, these old
2673 applications will not be supported using compatibility symbols.
2675 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
2676 defined by <sys/ptrace.h>.
2678 * libm no longer supports SVID error handling (calling a user-provided
2679 matherr function on error) or the _LIB_VERSION variable to control error
2680 handling. (SVID error handling and the _LIB_VERSION variable still work
2681 for binaries linked against older versions of the GNU C Library.) The
2682 libieee.a library is no longer provided. math.h no longer defines struct
2683 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
2684 TLOSS, PLOSS and HUGE.
2686 * The libm functions pow10, pow10f and pow10l are no longer supported for
2687 new programs. Programs should use the standard names exp10, exp10f and
2688 exp10l for these functions instead.
2690 * The mcontext_t type is no longer the same as struct sigcontext. On
2691 platforms where it was previously the same, this changes the C++ name
2692 mangling for interfaces involving this type.
2694 * The add-ons mechanism for building additional packages at the same time as
2695 glibc has been removed. The --enable-add-ons configure option is now
2698 * The --without-fp configure option is now ignored. Whether hardware
2699 floating-point instructions are used is now configured based on whether
2700 the compiler used at configure time (without any options implied by a
2701 --with-cpu= configure option) uses such instructions.
2703 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
2704 the specified string can be parsed as a domain name.
2706 * In the malloc_info output, the <heap> element may contain another <aspace>
2707 element, "subheaps", which contains the number of sub-heaps.
2709 * The libresolv function p_secstodate is no longer supported for new
2712 * The tilepro-*-linux-gnu configuration is no longer supported.
2714 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
2715 and will be removed in a future release. Software that is still using
2716 either header should be updated to use standard <stdio.h> interfaces
2719 libio.h was originally the header for a set of supported GNU extensions,
2720 but they have not been maintained as such in many years, they are now
2721 standing in the way of improvements to stdio, and we don't think there are
2722 any remaining external users. _G_config.h was never intended for public
2723 use, but predates the bits convention.
2725 Changes to build and runtime requirements:
2727 * bison version 2.7 or later is required to generate code in the 'intl'
2730 Security related changes:
2732 CVE-2009-5064: The ldd script would sometimes run the program under
2733 examination directly, without preventing code execution through the
2734 dynamic linker. (The glibc project disputes that this is a security
2735 vulnerability; only trusted binaries must be examined using the ldd
2738 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
2739 suffered from a one-byte overflow during ~ operator processing (either
2740 on the stack or the heap, depending on the length of the user name).
2741 Reported by Tim Rühsen.
2743 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
2744 would sometimes fail to free memory allocated during ~ operator
2745 processing, leading to a memory leak and, potentially, to a denial
2748 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
2749 without GLOB_NOESCAPE, could write past the end of a buffer while
2750 unescaping user names. Reported by Tim Rühsen.
2752 CVE-2017-17426: The malloc function, when called with an object size near
2753 the value SIZE_MAX, would return a pointer to a buffer which is too small,
2754 instead of NULL. This was a regression introduced with the new malloc
2755 thread cache in glibc 2.26. Reported by Iain Buclaw.
2757 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
2758 to the allocation of too much memory. (This is not a security bug per se,
2759 it is mentioned here only because of the CVE assignment.) Reported by
2762 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
2763 of the number of search path components. (This is not a security
2764 vulnerability per se because no trust boundary is crossed if the fix for
2765 CVE-2017-1000366 has been applied, but it is mentioned here only because
2766 of the CVE assignment.) Reported by Qualys.
2768 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
2769 for AT_SECURE or SUID binaries could be used to load libraries from the
2772 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
2773 succeeds without returning an absolute path due to unexpected behaviour
2774 of the Linux kernel getcwd syscall. Reported by halfdog.
2776 CVE-2018-6485: The posix_memalign and memalign functions, when called with
2777 an object size near the value of SIZE_MAX, would return a pointer to a
2778 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
2780 CVE-2018-6551: The malloc function, when called with an object size near
2781 the value of SIZE_MAX, would return a pointer to a buffer which is too
2782 small, instead of NULL.
2784 The following bugs are resolved with this release:
2786 [866] glob: glob should match dangling symlinks
2787 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
2788 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
2790 [5997] math: Very slow execution of sinf function
2791 [10580] localedata: hr_HR: updated locale
2792 [10871] locale: 'mon' array should contain both nominative and genitive
2794 [12349] localedata: eu_ES: incorrect thousands separator
2795 [13605] localedata: shn_MM: new Shan locale
2796 [13805] localedata: ru_RU: currency should use ',' as radix point
2797 [13953] localedata: km_KH: locale update
2798 [13994] localedata: mjw_IN: new locale
2799 [14121] build: make writes .mo files in po directory
2800 [14333] libc: Fix the race between atexit() and exit()
2801 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
2802 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
2804 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
2805 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
2806 width Latin characters
2807 [15332] localedata: es_CU: locale update
2808 [15436] stdio: Don't close or flush stdio streams on abort
2809 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
2811 [16148] localedata: ca_ES: incorrect thousands separator
2812 [16750] dynamic-link: ldd should not try to execute the binaries
2814 [16777] localedata: pl_PL: incorrect thousands separator in locale
2815 [16905] localedata: hanzi: new collation
2816 [17563] localedata: cmn_TW: add hanzi collation
2817 [17750] localedata: wrong collation order of diacritics in most locales
2818 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
2820 [17956] build: Build fails on missing definitions from header file
2821 nss/nss.h when Mozilla NSS is used for cryptography
2822 [18203] libc: realpath() does not handle unreachable paths correctly
2823 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
2824 [18812] localedata: kab_DZ: new Kabyle Algeria locale
2825 [18822] libc: Internal functions are called via PLT
2826 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
2827 [19170] libc: __gmon_start__ defined in hppa in crtn.S
2828 [19574] libc: glibc should support building static PIE binaries
2829 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
2831 [19971] glob: glob: Do not skip entries with zero d_ino values
2832 [19982] localedata: fr.po: spelling mistake for error code EXDEV
2833 [20008] localedata: km_KH: convert to translit_neutral
2834 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
2835 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
2836 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
2837 [20482] localedata: de_CH: abbreviated weekdays should be two letters
2838 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
2840 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
2841 they're set, wrong errors returned by gaih_inet when lookup functions
2843 [20756] localedata: [PATCH] Use Unicode wise thousands separator
2844 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
2846 [20952] localedata: yuw_PG: new locale
2847 [21084] localedata: charmaps/IBM858: new codepage
2848 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
2849 [21242] libc: assert gives pedantic warning in old gcc versions
2850 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
2851 __regcall calling convention
2852 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
2853 [21326] libc: C99 functions are not declared for C++11 and later if
2854 _GNU_SOURCE is not predefined by g++
2855 [21457] libc: sys/ucontext.h namespace
2856 [21530] libc: tmpfile() should be implemented using O_TMPFILE
2857 [21660] math: GCC fails to compile a formula with tgmath.h
2858 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
2859 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
2860 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
2861 [21684] math: tgmath.h handling of complex integers
2862 [21685] math: tgmath.h handling of bit-fields
2863 [21686] math: tgmath.h handling of __int128
2864 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2866 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
2868 [21750] localedata: column width of characters incompatible with classical
2870 [21754] malloc: malloc: Perform as little work as possible after heap
2871 consistency check failures
2872 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
2873 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
2874 [21791] string: Unused XXX_chk_XXX functions in libc.a
2875 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
2877 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
2879 [21845] localedata: Added new Locale bho_NP
2880 [21853] localedata: Fix abday Which looks same as day in zh_SG
2881 [21854] localedata: Added New Locale en_SC
2882 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
2883 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
2884 _dl_runtime_resolve_avx_slow
2885 [21885] network: getaddrinfo: gethosts does not release resolver context
2886 on memory allocation failure
2887 [21899] libc: XPG4.2 sigaction namespace
2888 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
2890 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
2892 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
2893 errno value, causing getaddrinfo to fail
2894 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
2895 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
2896 instead of EAI_NODATA
2897 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
2898 constant PTRACE_SEIZE_DEVEL
2899 [21930] math: C-only gcc builtins used in <math.h> isinf
2900 [21932] network: Unpaired __resolv_context_get in generic get*_r
2902 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
2903 [21944] libc: sigval namespace
2904 [21951] localedata: Update hanzi collation by stroke
2905 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
2906 sysdeps/x86_64/fpu/e_expf.S
2907 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
2908 allocation in syscall loops)
2909 [21959] localedata: Fix Country name for xh_ZA
2910 [21960] localedata: Fix abmon for bem_ZM
2911 [21966] math: AVX2 mathvec functions use FMA without checking
2912 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
2913 [21971] localedata: Added New Locale for mfe_MU
2914 [21972] libc: assert macro requires operator== (int) for its argument type
2915 [21973] math: [sparc] libm missing sqrtl compat symbol
2916 [21974] libc: Remove __bb_init_func and __bb_exit_func
2917 [21982] string: stratcliff.c: error: assuming signed overflow does not
2919 [21986] stdio: __guess_grouping is called incorrectly
2920 [21987] math: [sparc32] wrong bits/long-double.h installed
2921 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
2923 [22022] localedata: Missing country_name for mni_IN
2924 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
2926 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
2928 [22026] locale: iconv_open: heap overflow on gconv_init failure
2929 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
2930 [22035] math: [m68k] bits/math-inline.h macro namespace
2931 [22038] localedata: Fix abbreviated weeks and months for Somali
2932 [22044] localedata: Remove redundant data for Limburgish Language
2933 [22050] malloc: Linking with -lmcheck does not hook
2934 __malloc_initialize_hook correctly
2935 [22051] libc: zero terminator in the middle of glibc's .eh_frame
2936 [22052] malloc: malloc failed to compile with GCC 7 and -O3
2937 [22070] localedata: charmaps/UTF-8: wcwidth for
2938 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
2939 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
2940 Jungseong and Jongseong) should be 0
2941 [22078] nss: nss_files performance issue in multi mode
2942 [22082] math: bits/math-finite.h exp10 condition
2943 [22086] libc: pcprofiledump incorrect cross-endian condition
2944 [22093] dynamic-link: ld.so no longer searches in .../x86_64
2945 [22095] network: Name server address allocation memory leak in resolv.conf
2947 [22096] network: __resolv_conf_attach can incorrectly free passed conf
2949 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
2950 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
2952 [22111] malloc: malloc: per thread cache is not returned when thread exits
2953 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
2954 [22134] libc: [linux] implement fexecve with execveat
2955 [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and
2957 [22145] libc: ttyname() gives up too early in the face of namespaces
2958 [22146] math: C++ build issue with float128 on x86_64
2959 [22153] nptl: nptl: save error code before process termination
2960 [22156] libc: [hppa,ia64,microblaze] Executable stack default
2961 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
2962 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
2963 [22165] libc: [hppa] Text relocations in libc.so
2964 [22180] libc: destructor registered via __cxa_atexit is called twice
2965 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
2966 symlinks") cause "make" segfaults
2967 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
2969 [22207] libc: FAIL: stdlib/test-atexit-race
2970 [22225] math: nearbyint arithmetic moved before feholdexcept
2971 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
2972 [22235] math: iscanonical in C++ and float128
2973 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
2974 the svid compat wrapper
2975 [22244] math: ynf and yn are wrong without the svid compat wrapper
2976 [22273] libc: Improper assert in Linux posix_spawn implementation
2977 [22284] libc: -pg -pie doesn't work
2978 [22292] locale: localedef exits with error 4 when it should be error 1
2979 [22294] locale: Allow "" for int_currency_symbol definition in locales.
2980 [22295] locale: Don't warn on non-symbolic characters in locale sources in
2982 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
2983 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
2985 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
2986 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
2987 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
2988 [22322] libc: [mips64] wrong bits/long-double.h installed
2989 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
2990 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
2992 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
2993 [22343] malloc: Integer overflow in posix_memalign
2994 [22347] libc: getrandom() returns the number of bytes that were copied to
2995 the buffer even though the comments say "Return 0 on success and -1 on
2997 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
2998 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
3000 [22370] dynamic-link: Incorrect note padding check
3001 [22375] libc: malloc returns pointer from tcache_get when should return
3002 NULL (CVE-2017-17426)
3003 [22377] math: iseqsig, float128 and C++
3004 [22382] localedata: Error in tpi_PG locale
3005 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
3006 inside the ASCII printable range
3007 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
3009 [22403] localedata: Slash needs escaping in some locales
3010 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
3011 [22409] network: res_hnok does not accept some host names used on the
3013 [22412] network: res_dnok, res_hnok should perform syntax checks
3014 [22413] network: ns_name_pton ignores syntactically invalid trailing
3016 [22415] stdio: setvbuf can lead to invalid free/segfault
3017 [22432] build: Non-deterministic build
3018 [22439] malloc: malloc_info should compute summary statistics for all sub-
3020 [22442] network: if_nametoindex could report index for the wrong
3021 networking interface
3022 [22446] build: aliasing violation calling readlink in handle_request
3023 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
3024 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
3025 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
3026 __nscd_hash/__nss_hash
3027 [22463] network: p_secstodate overflow handling
3028 [22469] localedata: pl_PL LC_COLLATE does not use i18n
3029 [22478] libc: sigwait can fail with EINTR
3030 [22505] libc: ldconfig processes include directive in locale-specific
3032 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
3033 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
3034 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
3035 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
3036 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
3037 [22534] localedata: Collation rules for Serbian and Bosnian should be the
3038 same as for Croatian
3039 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
3040 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
3041 [22577] libc: missing newline after "cannot allocate TLS data structures
3043 [22588] manual: manual/conf.texi: missing underscore in front of
3045 [22593] math: nextafter and nexttoward are declared with const attribute
3046 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
3047 [22603] string: ia64 memchr overflows internal pointer check
3048 [22605] libc: SH clone does not set the exit code correctly
3049 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
3051 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
3052 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
3053 modified in case of success
3054 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
3055 [22615] manual: manual: ambiguous wording about errno value in case of
3057 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
3059 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
3060 binaries or if /proc is not mounted (CVE-2017-16997)
3061 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
3062 [22630] build: $(no-pie-ldflag) is no longer effective
3063 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
3064 [22635] nptl: pthread_self returns NULL before libpthread is loaded
3065 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
3066 [22637] nptl: guard size is subtracted from thread stack size instead of
3068 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
3069 [22657] localedata: hu_HU: Avoid double space in date
3070 [22660] math: fmax, fmin sNaN handling on alpha
3071 [22664] libc: New warning of GCC8
3072 [22665] math: alpha: ceil and floor raise inexact exceptions
3073 [22666] math: alpha: trunc raise inexact exceptions
3074 [22667] libc: makecontext lacks stack alignment on i386
3075 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
3076 [22679] libc: getcwd(3) can succeed without returning an absolute path
3078 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
3079 elision and tunables
3080 [22687] math: [powerpc-nofpu] complex long double functions spurious
3082 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
3083 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
3084 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
3086 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
3087 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
3089 [22701] nis: Incomplete removal of libnsl
3090 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
3091 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
3092 [22715] dynamic-link: FAIL: elf/tst-audit10
3093 [22719] libc: Backtrace tests fail on hppa
3094 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
3095 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
3096 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
3097 before the first call to crypt_r () in crypt/badsalttest.c
3104 * A per-thread cache has been added to malloc. Access to the cache requires
3105 no locks and therefore significantly accelerates the fast path to allocate
3106 and free small amounts of memory. Refilling an empty cache requires locking
3107 the underlying arena. Performance measurements show significant gains in a
3108 wide variety of user workloads. Workloads were captured using a special
3109 instrumented malloc and analyzed with a malloc simulator. Contributed by
3110 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
3112 * Unicode 10.0.0 Support: Character encoding, character type info, and
3113 transliteration tables are all updated to Unicode 10.0.0, using
3114 generator scripts contributed by Mike FABIAN (Red Hat).
3115 These updates cause user visible changes, especially the changes in
3116 wcwidth for many emoji characters cause problems when emoji sequences
3117 are rendered with pango, see for example:
3118 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
3120 * Collation of Hungarian has been overhauled and is now consistent with "The
3121 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
3124 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
3126 - The GNU C Library will now detect when /etc/resolv.conf has been
3127 modified and reload the changed configuration. The new resolver option
3128 “no-reload” (RES_NORELOAD) disables this behavior.
3130 - The GNU C Library now supports an arbitrary number of search domains
3131 (configured using the “search” directive in /etc/resolv.conf);
3132 previously, there was a hard limit of six domains. For backward
3133 compatibility, applications that directly modify the ‘_res’ global
3134 object are still limited to six search domains.
3136 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
3137 Library will now randomly pick a name server from the configuration as a
3138 starting point. (Previously, the second name server was always used.)
3140 * The tunables feature is now enabled by default. This allows users to tweak
3141 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
3143 * New function reallocarray, which resizes an allocated block (like realloc)
3144 to the product of two sizes, with a guaranteed clean failure upon integer
3145 overflow in the multiplication. Originally from OpenBSD, contributed by
3146 Dennis Wölfing and Rüdiger Sonderfeld.
3148 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
3149 These are extended versions of preadv and pwritev, respectively, taking an
3150 additional flags argument. The set of supported flags depends on the
3151 running kernel; full support currently requires kernel 4.7 or later.
3153 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
3154 create a new session ID for the spawned process. This feature is
3155 scheduled to be added to the next major revision of POSIX; for the time
3156 being, it is available under _GNU_SOURCE.
3158 * errno.h is now safe to use from C-preprocessed assembly language on all
3159 supported operating systems. In this context, it will only define the
3160 Exxxx constants, as preprocessor macros expanding to integer literals.
3162 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
3163 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
3164 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
3165 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
3167 To compile programs that use this feature, the compiler must support
3168 128-bit floating point with the type name _Float128 (as defined by TS
3169 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
3170 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
3171 must be defined to make the new interfaces visible.
3173 The new functions and macros correspond to those present for other
3174 floating-point types (except for a few obsolescent interfaces not
3175 supported for the new type), with F128 or f128 suffixes; for example,
3176 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
3177 printf or scanf formats for the new type; the strfromf128 and strtof128
3178 interfaces should be used instead.
3180 Deprecated and removed features, and other changes affecting compatibility:
3182 * The synchronization that pthread_spin_unlock performs has been changed to
3183 now be equivalent to a C11 atomic store with release memory order to the
3184 spin lock's memory location. Previously, several (but not all)
3185 architectures used stronger synchronization (e.g., containing what is
3186 often called a full barrier). This change can improve performance, but
3187 may affect odd fringe uses of spin locks that depend on the previous
3188 behavior (e.g., using spin locks as atomic variables to try to implement
3189 Dekker's mutual exclusion algorithm).
3191 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
3194 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
3195 will only be built and installed when the GNU C Library is configured with
3196 --enable-obsolete-rpc. This allows alternative RPC implementations, such
3197 as TIRPC or rpcsvc-proto, to be used.
3199 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
3200 libnss_compat, are deprecated, and will not be built or installed by
3203 The NIS(+) support library, libnsl, is also deprecated. By default, a
3204 compatibility shared library will be built and installed, but not headers
3205 or development libraries. Only a few NIS-related programs require this
3206 library. (In particular, the GNU C Library has never required programs
3207 that use 'gethostbyname' to be linked with libnsl.)
3209 Replacement implementations based on TIRPC, which additionally support
3210 IPv6, are available from <https://github.com/thkukuk/>. The configure
3211 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
3212 name service modules, to be built and installed.
3214 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
3215 support is enabled, the configured recursive resolver must support EDNS.
3216 (Responding to EDNS-enabled queries with responses which are not
3217 EDNS-enabled is fine, but FORMERR responses are not.)
3219 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
3220 servers have not supported this opcode for a long time.
3222 * The _res_opcodes variable has been removed from libresolv. It had been
3223 exported by accident.
3225 * <string.h> no longer includes inline versions of any string functions,
3226 as this kind of optimization is better done by the compiler. The macros
3227 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
3229 * The nonstandard header <xlocale.h> has been removed. Most programs should
3230 use <locale.h> instead. If you have a specific need for the definition of
3231 locale_t with no other declarations, please contact
3232 libc-alpha@sourceware.org and explain.
3234 * The obsolete header <sys/ultrasound.h> has been removed.
3236 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
3238 * The obsolete function cfree has been removed. Applications should use
3241 * The stack_t type no longer has the name struct sigaltstack. This changes
3242 the C++ name mangling for interfaces involving this type.
3244 * The ucontext_t type no longer has the name struct ucontext. This changes
3245 the C++ name mangling for interfaces involving this type.
3247 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
3248 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
3249 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
3250 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
3251 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
3252 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
3253 fpregset_t type no longer has the name struct fpu. This changes the C++
3254 name mangling for interfaces involving those types.
3256 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
3257 synced with the kernel:
3259 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
3260 are not supported on this architecture and have been removed.
3262 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
3263 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
3264 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
3266 Programs that assume the GET/SETREGS ptrace requests are universally
3267 available will now fail to build, instead of malfunctioning at runtime.
3269 Changes to build and runtime requirements:
3271 * Linux kernel 3.2 or later is required at runtime, on all architectures
3272 supported by that kernel. (This is a change from version 2.25 only for
3275 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
3277 * On most architectures, GCC 4.9 or later is required to build the GNU C
3278 Library. On powerpc64le, GCC 6.2 or later is required.
3280 Older GCC versions and non-GNU compilers are still supported when
3281 compiling programs that use the GNU C Library. (We do not know exactly
3282 how old, and some GNU extensions to C may be _de facto_ required. If you
3283 are interested in helping us make this statement less vague, please
3284 contact libc-alpha@sourceware.org.)
3286 Security related changes:
3288 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
3289 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
3291 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
3292 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
3294 * Avoid printing a backtrace from the __stack_chk_fail function since it is
3295 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
3298 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
3299 fixed (CVE-2017-12133).
3301 The following bugs are resolved with this release:
3303 [984] network: Respond to changed resolv.conf in gethostbyname
3304 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
3305 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
3307 [12189] libc: __stack_chk_fail should not attempt a backtrace
3309 [14096] time: Race condition on timezone/tst-timezone.out
3310 [14172] localedata: az_IR: new locale
3311 [14995] build: glibc fails to build if gold is the default linker, even if
3313 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
3314 [16637] network: inet_pton function is accepting IPv6 with bad format
3315 [16640] string: string/strtok.c: undefined behaviour inconsistent between
3316 x86 and other generic code
3317 [16875] localedata: ko_KR: fix lang_name
3318 [17225] localedata: ar_SY: localized month names for May and June are
3320 [17297] localedata: da_DK: wrong date_fmt string
3321 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
3322 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
3323 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
3324 [19066] localedata: ar_SA abbreviated day and month names are in English
3325 [19569] network: resolv: Support an arbitrary number of search domains
3326 [19570] network: Implement random DNS server selection in the stub
3328 [19838] locale: localedef fails on PA-RISC
3329 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
3330 order of 0D36 and 0D37
3331 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
3333 [20098] libc: FAIL: debug/backtrace-tst on hppa
3334 [20257] network: sunrpc: clntudp_call does not enforce timeout when
3336 [20275] localedata: locale day/abday/mon/abmon should not have trailing
3338 [20313] localedata: Update locale data to Unicode 9.0
3339 [20424] manual: Document how to provide a malloc replacement
3340 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
3342 [20686] locale: Add el_GR@euro to SUPPORTED.
3343 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
3344 failures consistently
3345 [21015] dynamic-link: Document and fix --enable-bind-now
3346 [21016] nptl: pthread_cond support is broken on hppa
3347 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
3348 frame-pointer on i386
3349 [21049] libc: segfault in longjmp_chk() due to clobbered processor
3351 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
3352 [21088] libc: Build fails with --enable-static-nss
3353 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
3354 generic c code is used
3355 [21109] libc: Tunables broken on big-endian
3356 [21112] math: powf has large ulp errors with base close to 1 and exponent
3358 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
3360 [21120] malloc: glibc malloc is incompatible with GCC 7
3361 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
3363 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
3364 (-0.0) when linking with -lieee
3365 [21171] math: log10, log2 and lgamma return incorrect results
3366 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
3367 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
3368 [21207] localedata: ce_RU: update weekdays from CLDR
3369 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
3370 [21217] localedata: Update months from CLDR-31
3371 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
3372 [21243] libc: support_delete_temp_file should issue warning for failed
3374 [21244] libc: support resolv_test_start() socket fd close should be
3376 [21253] libc: localedef randomly segfaults when using -fstack-check due to
3377 new posix_spawn implementation
3378 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
3379 leads to lower CPU frequency
3380 [21259] libc: [alpha] termios.h missing IXANY for POSIX
3381 [21261] libc: [sparc64] bits/setjmp.h namespace
3382 [21267] network: [mips] bits/socket.h IOC* namespace
3383 [21268] libc: [alpha] termios.h NL2, NL3 namespace
3384 [21270] libc: mmap64 silently truncates large offset values
3385 [21275] libc: posix_spawn always crashes on ia64 now
3386 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
3387 [21280] math: [powerpc] logbl for POWER7 return incorrect results
3388 [21289] libc: Incorrect declaration for 32-bit platforms with
3389 _FILE_OFFSET_BITS=64 causes build error
3390 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
3391 not support gethostbyname4_r
3392 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
3394 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
3396 [21340] libc: Support POSIX_SPAWN_SETSID
3397 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
3398 [21359] network: ns_name_pack needs additional byte in destination buffer
3399 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
3400 against fragmentation attacks (CVE-2017-12132)
3401 [21369] network: resolv: Remove EDNS fallback
3402 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
3404 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
3405 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
3406 [21393] stdio: Missing dup3 error check in freopen, freopen64
3407 [21396] libc: Use AVX2 memcpy/memset on Skylake server
3408 [21399] localedata: Bad description for U00EC in
3409 localedata/charmaps/CP1254
3410 [21411] malloc: realloc documentation error
3411 [21426] network: sys/socket.h uio.h namespace
3412 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
3413 [21445] libc: signal.h bsd_signal namespace
3414 [21455] network: Network headers stdint.h namespace
3415 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
3417 [21475] network: resolv: Overlong search path is truncated mid-label
3418 [21511] libc: sigstack namespace
3419 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
3420 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
3421 bits/syscall.h: No such file or directory
3422 [21517] libc: struct sigaltstack namespace
3423 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
3424 [21533] localedata: Update locale data to Unicode 10.0
3426 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
3427 junk at end of line, first unrecognized character is `@'
3428 [21538] libc: SIG_HOLD missing for XPG4
3429 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
3430 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
3431 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
3432 [21543] libc: sigevent namespace
3433 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
3434 size for general purpose registers in mcontext_t structure
3435 [21550] libc: sigwait namespace
3436 [21552] libc: XPG4 bsd_signal namespace
3437 [21554] libc: sigpause namespace
3438 [21560] libc: sys/wait.h signal.h namespace
3439 [21561] libc: waitid namespace
3440 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
3441 '/usr/include/stdlib.h': Permission denied
3442 [21575] libc: sys/wait.h missing struct rusage definition
3443 [21584] libc: sigaltstack etc namespace
3444 [21597] libc: siginterrupt namespace
3445 [21607] math: hppa: FAIL: math/test-tgmath
3446 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
3448 [21622] libc: [tile] missing SA_* for POSIX.1:2008
3449 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
3450 stack and heap (CVE-2017-1000366)
3451 [21625] libc: wait3 namespace
3452 [21654] nss: Incorrect pointer alignment in NSS group merge result
3454 [21657] network: Parse interface zone id for node-local multicast
3455 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
3457 [21666] libc: .symver is used on common symbol
3458 [21668] network: resolv: res_init cross-thread broadcast introduces race
3460 [21687] math: tgmath.h totalorder, totalordermag return type
3461 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
3463 [21696] libc: Incorrect assumption of of __cpu_mask in
3464 posix/sched_cpucount.c
3465 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
3466 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
3468 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
3469 leading to relocation crash
3470 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
3471 `resolv_conf_matches (resp, conf)' failed.
3472 [21710] localedata: Added Samoan language locale for Samoa
3473 [21711] localedata: Pashto yesstr/nostr locale are missing
3474 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
3475 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
3476 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
3477 [21723] localedata: yesstr/nostr missing for Chinese language locale
3478 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
3480 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
3482 [21728] localedata: New Locale for Tongan language
3483 [21729] localedata: incorrect LC_NAME fields for hi_IN
3484 [21733] localedata: yesstr and nostr are missing for zh_HK
3485 [21734] localedata: Missing yesstr and nostr are for kw_GB
3486 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
3487 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
3488 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
3489 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
3491 [21744] libc: Tests failing on --enable-tunables --enable-stack-
3493 [21749] localedata: Wrong abbreviated day name (“abday”) for
3495 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
3496 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
3497 [21759] localedata: missing yesstr and nostr for Tigrinya
3498 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
3499 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
3500 [21767] localedata: Missing Bislama locales
3501 [21768] localedata: Missing yesstr and nostr for aa_ET
3502 [21770] localedata: Missing Field in li_NL
3503 [21778] nptl: Robust mutex may deadlock
3504 [21779] libc: MicroBlaze segfaults when loading libpthread
3505 [21783] localedata: Fix int_select international_call_prefixes
3506 [21784] localedata: Inconsistency in country_isbn
3507 [21788] localedata: Missing Country Postal Abbreviations
3508 [21794] localedata: Added-country_isbn-for-Italy
3509 [21795] localedata: Add/Fix country_isbn for France
3510 [21796] localedata: Added country_isbn for Republic of Korea
3511 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
3512 [21799] localedata: Added int_select international_call_prefixes
3513 [21801] localedata: Added int_select international_call_prefixes
3514 [21804] nptl: Double semicolon in thread-shared-types.h
3515 [21807] localedata: LC_ADDRESS fix for pap_CW
3516 [21808] localedata: Fix LC_ADDRESS for pap_AW
3517 [21821] localedata: Added country_name in mai_IN
3518 [21822] localedata: Fix LC_TIME for mai_IN
3519 [21823] localedata: missing yesstr, nostr for sa_IN
3520 [21825] localedata: Fix name_mrs for mag_IN
3521 [21828] localedata: 2.26 changelog should mention user visible changes
3523 [21835] localedata: Added Maithili language locale for Nepal
3524 [21838] localedata: Removed redundant data for the_NP
3525 [21839] localedata: Fix LC_MONETARY for ta_LK
3526 [21844] localedata: Fix Latin characters and Months Sequence.
3527 [21848] localedata: Fix mai_NP Title Name
3532 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
3533 24731-2:2010, is supported to enable declarations of functions from that
3534 TR. Note that not all functions from that TR are supported by the GNU C
3537 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
3538 18661-1:2014, is supported to enable declarations of functions and macros
3539 from that TS. Note that not all features from that TS are supported by
3542 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
3543 18661-4:2015, is supported to enable declarations of functions and macros
3544 from that TS. Note that most features from that TS are not supported by
3547 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
3548 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
3549 Since the GNU C Library defaults to a much newer revision of POSIX, this
3550 will only affect programs that specifically request an old conformance
3551 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
3552 see a change in the visible declarations, but a program compiled with
3553 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
3556 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
3557 defined by all multithreaded code, but glibc has not required this for
3560 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
3561 means that in a future release, the macros “major”, “minor”, and “makedev”
3562 will only be available from <sys/sysmacros.h>.
3564 These macros are not part of POSIX nor XSI, and their names frequently
3565 collide with user code; see for instance glibc bug 19239 and Red Hat bug
3566 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
3567 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
3570 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
3571 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
3572 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
3574 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
3575 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
3576 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
3577 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
3578 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
3579 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
3580 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
3581 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
3582 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
3583 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
3584 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
3587 * New <math.h> features are added from TS 18661-1:2014:
3589 - Signaling NaN macros: SNANF, SNAN, SNANL.
3591 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
3592 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
3593 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
3595 - llogb functions: the llogb, llogbf and llogbl functions, and the
3596 FP_LLOGB0 and FP_LLOGBNAN macros.
3598 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
3601 - Comparison macros: iseqsig.
3603 - Classification macros: iscanonical, issubnormal, iszero.
3605 - Total order functions: totalorder, totalorderf, totalorderl,
3606 totalordermag, totalordermagf, totalordermagl.
3608 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
3610 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
3611 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
3613 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
3614 are added to libc. They convert a floating-point number into string.
3616 * Most of glibc can now be built with the stack smashing protector enabled.
3617 It is recommended to build glibc with --enable-stack-protector=strong.
3618 Implemented by Nick Alcock (Oracle).
3620 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
3621 intended to be used instead of memset() to erase sensitive data after use;
3622 the compiler will not optimize out calls to explicit_bzero even if they
3623 are "unnecessary" (in the sense that no _correct_ program can observe the
3624 effects of the memory clear).
3626 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
3627 to float instead of double. This does not affect the ABI of any libraries
3628 that are part of the GNU C Library, but may affect the ABI of other
3629 libraries that use this type in their interfaces.
3631 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
3632 float_t and double_t types are now defined to long double instead of float
3633 and double. These options are not the default, and this does not affect
3634 the ABI of any libraries that are part of the GNU C Library, but it may
3635 affect the ABI of other libraries that use this type in their interfaces,
3636 if they are compiled or used with those options.
3638 * The getentropy and getrandom functions, and the <sys/random.h> header file
3641 * The buffer size for byte-oriented stdio streams is now limited to 8192
3642 bytes by default. Previously, on Linux, the default buffer size on most
3643 file systems was 4096 bytes (and thus remains unchanged), except on
3644 network file systems, where the buffer size was unpredictable and could be
3645 as large as several megabytes.
3647 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
3648 for the Linux quota interface which predates kernel version 2.4.22 has
3651 * The malloc_get_state and malloc_set_state functions have been removed.
3652 Already-existing binaries that dynamically link to these functions will
3653 get a hidden implementation in which malloc_get_state is a stub. As far
3654 as we know, these functions are used only by GNU Emacs and this change
3655 will not adversely affect already-built Emacs executables. Any undumped
3656 Emacs executables, which normally exist only during an Emacs build, should
3657 be rebuilt by re-running “./configure; make” in the Emacs build tree.
3659 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
3660 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
3661 “no-ip6-dotint” had already been the default, and support for the
3662 “ip6-dotint” option was removed from the Internet in 2006.
3664 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
3665 flag from <resolv.h> have been removed. The option relied on a
3666 backwards-incompatible DNS extension which was never deployed on the
3669 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
3670 RES_BLAST defined in the <resolv.h> header file have been deprecated.
3671 They were already unimplemented.
3673 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
3674 _res.flags are deprecated. The flag was standardized in RFC 2133, but
3675 removed again from the IETF name lookup interface specification in RFC
3676 2553. Applications should use getaddrinfo instead.
3678 * DNSSEC-related declarations and definitions have been removed from the
3679 <arpa/nameser.h> header file, and libresolv will no longer attempt to
3680 decode the data part of DNSSEC record types. Previous versions of glibc
3681 only implemented minimal support for the previous version of DNSSEC, which
3682 is incompatible with the currently deployed version.
3684 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
3685 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
3686 <arpa/nameser.h> header file because the distinction between RR types and
3687 meta-RR types is not officially standardized, subject to revision, and
3688 thus not suitable for encoding in a macro.
3690 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
3691 and rhook members of the res_state type in <resolv.h> have been removed.
3692 The glibc stub resolver did not support these hooks, but the header file
3693 did not reflect that.
3695 * For multi-arch support it is recommended to use a GCC which has
3696 been built with support for GNU indirect functions. This ensures
3697 that correct debugging information is generated for functions
3698 selected by IFUNC resolvers. This support can either be enabled by
3699 configuring GCC with '--enable-gnu-indirect-function', or by
3700 enabling it by default by setting 'default_gnu_indirect_function'
3701 variable for a particular architecture in the GCC source file
3704 * GDB pretty printers have been added for mutex and condition variable
3705 structures in POSIX Threads. When installed and loaded in gdb these pretty
3706 printers show various pthread variables in human-readable form when read
3707 using the 'print' or 'display' commands in gdb.
3709 * Tunables feature added to allow tweaking of the runtime for an application
3710 program. This feature can be enabled with the '--enable-tunables' configure
3711 flag. The GNU C Library manual has details on usage and README.tunables has
3712 instructions on adding new tunables to the library.
3714 * A new version of condition variables functions have been implemented in
3715 the NPTL implementation of POSIX Threads to provide stronger ordering
3718 * A new version of pthread_rwlock functions have been implemented to use a more
3719 scalable algorithm primarily through not using a critical section anymore to
3722 Security related changes:
3724 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
3725 have been created with makecontext could fail to terminate due to a
3726 missing .cantunwind annotation. This has been observed to lead to a hang
3727 (denial of service) in some Go applications compiled with gccgo. Reported
3728 by Andreas Schwab. (CVE-2016-6323)
3730 * The DNS stub resolver functions would crash due to a NULL pointer
3731 dereference when processing a query with a valid DNS question type which
3732 was used internally in the implementation. The stub resolver now uses a
3733 question type which is outside the range of valid question type values.
3736 The following bugs are resolved with this release:
3738 [4099] stdio: Overly aggressive caching by stream i/o functions.
3739 [7065] build: Support building glibc with -fstack-protector or -fstack-
3741 [9842] localedata: en_CA: incorrect date format
3742 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
3743 before it started waiting
3744 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
3745 [15765] nptl: sem_open is wrongly a cancellation point
3746 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
3747 [16458] libc: endian.h and netinet/in.h byte order macros return values of
3749 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
3750 library linked with pthread
3751 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
3752 "FIXME: Ingo" issue)
3753 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
3754 [17252] libc: getrandom and getentropy syscall
3755 [17730] malloc: thread-local storage is sometimes improperly free()'d
3756 after being __libc_memalign()'d
3757 [18241] stdio: failed fseek on memstream does not set errno and can fail
3759 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
3761 [18463] nptl: pthread_cond_broadcast issue when surrounded by
3762 PTHREAD_PRIO_INHERIT mutex on ARM
3763 [18784] network: res_query and related function crash for special record
3764 type queries (CVE-2015-5180)
3765 [19380] math: strtod does not raise "inexact"
3766 [19387] string: Integer overflow in memchr
3767 [19390] string: Integer overflow in strncat
3768 [19398] build: linknamespace tests fail with massively parallel build
3769 [19402] nptl: Deadlock with robust shared mutex and asynchronous
3771 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
3772 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
3773 [19514] libc: [PATCH] Fix spelling errors in spelling
3774 "implement"/"implementation" in several places
3775 [19582] network: Deprecate RES_USE_INET6
3776 [19673] manual: clog10 docs appear to be erroneous
3777 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
3778 causes a segmentation fault
3779 [19826] libc: invalid pointer returned from __tls_get_addr with static
3781 [20016] network: resolv: Remove hooks support from the API
3782 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
3784 [20033] math: [x86_64] vectorized math function don't call the __finite
3786 [20116] nptl: use after free in pthread_create
3787 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
3788 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
3790 [20311] nptl: please install proc_service.h
3791 [20366] libc: Compilation errors in installed headers in strict-compliance
3793 [20370] malloc: malloc: Arena free list management is still racy
3794 (incorrect fix in bug 19243)
3795 [20386] libc: assert (X = 0) does not result in GCC warning
3796 [20432] malloc: malloc: Minimize interface required for interposition
3797 [20435] libc: Missing unwind info in __startcontext causes infinite loop
3798 in _Unwind_Backtrace (CVE-2016-6323)
3799 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
3800 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
3802 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
3803 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
3804 [20477] network: resolv: incorrect double-checked locking related to
3806 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
3808 [20495] math: x86_64 performance degradation due to AVX/SSE transition
3810 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
3811 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
3812 cause transition penalty
3813 [20517] math: sparcv9 missing fdiml compat symbol
3814 [20524] manual: strverscmp is inconsistent
3815 [20525] libc: <sys/quota.h> should be based on kernel headers
3816 [20539] math: GCC 7 -static -lm fails to link at -O3
3817 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
3819 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
3821 [20591] network: Remove obsolete DNSSEC support
3822 [20592] network: DNS resource record type classification macros in
3823 <arpa/nameser.h> are incorrect
3824 [20593] network: Update DNS RR type definitions
3825 [20611] network: getaddrinfo accepts invalid numeric scope IDs
3826 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
3828 [20629] network: libresolv: Remove support for bitstring labels
3830 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
3831 assertion: "maxidx >= 2"
3832 [20660] math: [arm] Use VSQRT
3833 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
3834 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
3835 [20689] libc: Test for FMA should also check for AVX.
3836 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
3837 [20715] math: iszero macro breaks existing code
3838 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
3839 [20728] libc: powerpc: Missing TOC stub in clone
3840 [20729] build: glibc-2.24 fails to build for i486 with -Os
3841 [20750] build: Build fails with default PIE enabled gcc-6.x
3842 [20768] math: [alpha] sqrt fegetenv namespace
3843 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
3845 [20787] math: float_t is defined as float incorrectly on x86_64 even if
3846 __FLT_EVAL_METHOD__ is 2
3847 [20790] network: rpcgen buffer overrun in get_prog_declaration
3848 [20822] nptl: race condition in __lll_unlock_elision on powerpc
3849 [20829] libc: crypt snprintf namespace
3850 [20847] libc: tst-vfork3 failure
3851 [20855] math: Default bits/mathdef.h has inappropriate float_t
3852 [20859] math: [sh4] FP_ILOGB0 invalid
3853 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
3854 U+20AC), not same as GBK
3855 [20915] dynamic-link: global-dynamic TLS broken on aarch64
3856 [20916] math: pow handling of sNaN arguments
3857 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
3858 [20919] math: Bad pow (qNaN, 0) result with -lieee
3859 [20940] math: hypot sNaN handling
3860 [20947] math: fmax, fmin sNaN handling
3861 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
3862 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
3864 [20971] string: powerpc64/power7 memchr overflows internal pointer check
3865 [20973] nptl: robust mutexes: Lost wake-ups
3866 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
3867 [20978] nis: strlen on null pointer in nss_nisplus
3868 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
3870 [21014] string: i686 memchr overflows internal pointer check
3871 [21019] libc: [mips] n32 lseek incorrect on overflow
3872 [21022] libc: [microblaze] __backtrace get_frame_size namespace
3873 [21026] libc: [MIPS] readahead syscall is broken on n64
3874 [21028] math: Fallback fesetexceptflag should always succeed
3875 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
3876 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
3878 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
3879 [21061] librt: [microblaze] librt lost clock_* exports
3880 [21073] libc: tunables: insecure environment variables passed to
3881 subprocesses with AT_SECURE
3882 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
3886 * The minimum Linux kernel version that this version of the GNU C Library
3887 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
3888 kernel version 2.6.32 or later suffices (on architectures that already
3889 required kernel versions more recent than 3.2, those requirements remain
3890 unchanged). Linux 3.2 or later kernel headers are required on all
3893 * The pap_AN locale has been deleted. This has been deprecated for a long
3894 time. It has been replaced by pap_AW & pap_CW, both of which have long
3895 been included in previous releases.
3897 * The readdir_r and readdir64_r functions have been deprecated. It is
3898 recommended to use readdir and readdir64 instead.
3900 * The type “union wait” has been removed. It was deprecated in the early
3901 1990s and never part of POSIX. Application code should use the int type
3902 instead of “union wait”.
3904 * A new NSS action is added to facilitate large distributed system
3905 administration. The action, MERGE, allows remote user stores like LDAP
3906 to be merged into local user stores like /etc/groups in order to provide
3907 easy to use, updated, and managed sets of merged credentials. The new
3908 action can be used by configuring it in /etc/nsswitch.conf:
3909 group: files [SUCCESS=merge] nis
3910 Implemented by Stephen Gallagher (Red Hat).
3912 * The deprecated __malloc_initialize_hook variable has been removed from the
3915 * The long unused localedef --old-style option has been removed. It hasn't
3916 done anything in over 16 years. Scripts using this option can safely
3919 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
3920 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
3921 return the next representable value in the direction of positive infinity
3922 and the nextdown functions return the next representable value in the
3923 direction of negative infinity. These are currently enabled as GNU
3926 Security related changes:
3928 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
3929 could result in a stack overflow when getnetbyname was called with an
3930 overly long name. (CVE-2016-3075)
3932 * Previously, getaddrinfo copied large amounts of address data to the stack,
3933 even after the fix for CVE-2013-4458 has been applied, potentially
3934 resulting in a stack overflow. getaddrinfo now uses a heap allocation
3935 instead. Reported by Michael Petlan. (CVE-2016-3706)
3937 * The glob function suffered from a stack-based buffer overflow when it was
3938 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
3939 Reported by Alexander Cherepanov. (CVE-2016-1234)
3941 * The Sun RPC UDP client could exhaust all available stack space when
3942 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
3943 alloca plugin for GCC. (CVE-2016-4429)
3945 * The IPv6 name server management code in libresolv could result in a memory
3946 leak for each thread which is created, performs a failing naming lookup,
3947 and exits. Over time, this could result in a denial of service due to
3948 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
3950 The following bugs are resolved with this release:
3952 [1170] localedata: ne_NP: update Nepali locale definition file
3953 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
3955 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
3956 [6796] math: fdim() does not set errno on overflow
3957 [10354] libc: posix_spawn should use vfork() in more cases than presently
3958 [11213] localedata: localedata: add copyright disclaimer to locale files
3959 [12143] localedata: chr_US: new Cherokee locale
3960 [12450] localedata: sgs_LT: new locale
3961 [12676] localedata: ln_CD: new locale
3962 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
3964 [13304] math: fma, fmaf, fmal produce wrong results
3965 [14259] build: --localedir arg to configure is ignored
3966 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
3967 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
3968 [14934] localedata: es_CL: wrong first weekday chilean locale
3969 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
3971 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
3973 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
3974 [15368] nptl: raise() is not async-signal-safe
3975 [15479] math: ceil, floor, round and trunc raise inexact exception
3976 [15578] localedata: kk_KZ: various updates
3977 [16003] localedata: pap_AN: punt old locale
3978 [16137] localedata: iw_IL: punt old locale
3979 [16190] localedata: eo: new esperanto locale
3980 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
3981 [16742] malloc: race condition: pthread_atfork() called before first
3982 malloc() results in unexpected locking behaviour/deadlocks
3983 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
3985 [16983] localedata: postal_fmt does not allow %l and %n modifiers
3986 [17565] localedata: pt_PT: wrong (work-)week start
3987 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
3988 [17950] build: Build fails with -msse
3989 [18205] localedata: be_BY*: wrong first_weekday and first_workday
3990 [18433] libc: posix_spawn does not return correctly upon failure to
3992 [18453] localedata: charmaps/IBM875: incorrect codes
3993 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
3995 [18896] localedata: he_IL: improvements for currency
3996 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
3997 Romanian locale data
3998 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
4000 [19056] libc: Deprecate readdir_r
4001 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
4003 [19198] localedata: nl_NL: small improvements for Dutch locales
4004 [19257] network: Per-thread memory leak in __res_vinit with IPv6
4005 nameservers (CVE-2016-5417)
4006 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
4008 [19400] locale: Language missing in "iso-639.def", trivial fix in
4010 [19431] malloc: Deadlock between fflush, getdelim, and fork
4011 [19505] libc: Incorrect file descriptor validity checks in
4012 posix_spawn_file_actions_add{open,close,dup2}
4013 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
4014 when using RTLD_NEXT
4015 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
4016 `intl/{gettextP,loadinfo}.h'
4017 [19534] libc: execle, execlp may use malloc
4018 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
4019 [19573] network: res_nclose and __res_maybe_init disagree about name
4020 server initialization, breaking Hesiod
4021 [19575] localedata: Status of GB18030 tables
4022 [19581] localedata: sr_* date_fmt string contains additional newline
4023 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
4025 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
4026 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
4027 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
4028 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
4030 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
4032 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
4034 [19610] dynamic-link: ldconfig -X removes stale symbolic links
4035 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
4036 [19633] locale: strfmon_l applies global locale to number formatting
4037 [19642] network: Memory leak in getnameinfo
4038 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
4039 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
4041 [19654] math: [x86_64] Need testcase for BZ #19590 fix
4042 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
4044 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
4045 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
4047 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
4049 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
4051 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
4052 pointers and lengths in error-case.
4053 [19727] locale: Converting from/to UTF-xx with iconv() does not always
4054 report errors on UTF-16 surrogates values.
4055 [19755] nscd: nscd assertion failure in gc
4056 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
4057 [19759] libc: mempcpy shouldn't be inlined
4058 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
4059 [19765] libc: s390 needs an optimized mempcpy
4060 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
4061 NAME_MAX limit assumption (CVE-2016-1234)
4062 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
4063 [19787] network: Missing and incorrect truncation checks in getnameinfo
4064 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
4066 [19791] network: Assertion failure in res_query.c with un-connectable name
4068 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
4069 [19822] math: libm.so install clobbers old version
4070 [19825] network: resolv: send_vc can return uninitialized data in second
4071 response to getaddrinfo
4072 [19830] network: nss_dns: should check RDATA length against buffer length
4073 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
4074 confronted with A/AAAA records of invalid size
4075 [19837] nss: nss_db: No retries for some long lines with a larger buffer
4076 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
4077 [19853] stdio: Printing IBM long double in decimal with high precision is
4079 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
4080 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
4081 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
4083 [19865] network: Assertion failure or memory leak in
4084 _nss_dns_getcanonname_r
4085 [19868] network: nss_dns: netent code does not skip over non-PTR records
4086 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
4088 [19881] string: Improve x86-64 memset
4089 [19907] string: Incorrect memcpy tests
4090 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
4092 [19925] libc: termios.h XCASE namespace
4093 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
4094 [19929] libc: limits.h NL_NMAX namespace
4095 [19931] stdio: Memory leak in vfprintf
4096 [19957] libc: clone(CLONE_VM) access invalid parent memory
4097 [19963] localedata: en_IL: New locale
4098 [19989] stdio: stdio.h cuserid namespace
4099 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
4101 [19996] locale: langinfo.h nl_langinfo_l namespace
4102 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
4103 [20010] network: getaddrinfo: Stack overflow in hostent translation
4105 [20012] stdio: libio: fmemopen append mode failure
4106 [20014] stdio: stdio.h namespace for pre-threads POSIX
4107 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
4108 [20023] libc: fcntl.h timespec namespace
4109 [20024] math: [x86_64] vectorized sincos trashes the stack
4110 [20031] network: nss_hesiod: Heap overflow in get_txt_records
4111 [20041] time: sys/time.h timespec namespace
4112 [20043] libc: unistd.h missing cuserid for UNIX98 and before
4113 [20044] libc: unistd.h missing pthread_atfork for UNIX98
4114 [20051] libc: ttyslot in wrong header under wrong conditions
4115 [20054] libc: gethostname not declared for XPG4
4116 [20055] libc: termios.h missing tcgetsid for XPG4
4117 [20072] dynamic-link: x86 init_cpu_features is called twice in static
4119 [20073] libc: sys/stat.h fchmod namespace
4120 [20074] libc: stdlib.h rand_r namespace
4121 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
4122 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
4124 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
4125 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
4127 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
4128 [20119] libc: Wrong mask for processors level type from CPUID
4129 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
4130 AS not supporting AVX512
4131 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
4133 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
4134 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
4136 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
4137 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
4138 [20178] libc: posix_spawn{p} should not call exit
4139 [20191] stdio: libio: vtables hardening
4140 [20195] string: FMA4 detection requires CPUID execution with register
4142 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
4143 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
4145 [20212] math: acos (sNaN) returns sNaN
4146 [20213] math: asin (sNaN) returns sNaN
4147 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
4148 [20218] math: [i386] asinhl (sNaN) returns sNaN
4149 [20219] math: [i386] atanhl (sNaN) returns sNaN
4150 [20222] stdio: fopencookie: Mangle function pointers
4151 [20224] math: [i386] cbrtl (sNaN) returns sNaN
4152 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
4153 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
4155 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
4156 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
4157 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
4158 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
4159 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
4160 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
4161 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
4162 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
4163 [20240] math: modf (sNaN) returns sNaN
4164 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
4165 [20250] math: frexp (sNaN) returns sNaN
4166 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
4167 [20255] math: [i386] fdim, fdimf return with excess range and precision /
4169 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
4170 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
4171 subscript is below array bounds [-Werror=array-bounds]
4172 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
4173 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
4175 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
4176 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
4178 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
4179 "invalid" exceptions
4180 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
4181 [20316] localedata: id_ID: Februari instead of Pebruari
4182 [20327] string: POWER8 strcasecmp returns incorrect result
4183 [20347] math: Failure: Test: j0_downward (0xap+0)
4184 [20348] libc: FAIL: misc/tst-preadvwritev64
4185 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
4186 [20350] libc: There is no test for p{read,write}64
4187 [20357] math: Incorrect cos result for 1.5174239687223976
4188 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
4192 * Unicode 8.0.0 Support: Character encoding, character type info, and
4193 transliteration tables are all updated to Unicode 8.0.0, using new
4194 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
4195 These updates cause user visible changes, such as the fixes for bugs
4196 89, 16061, and 18568.
4198 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
4199 kernel-internal CPU set size. This means that requests that change the
4200 CPU affinity which failed before (for example, an all-ones CPU mask) will
4201 now succeed. Applications that need to determine the effective CPU
4202 affinities need to call sched_getaffinity or pthread_getaffinity_np after
4203 setting it because the kernel can adjust it (and the previous size check
4204 would not detect this in the majority of cases).
4206 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
4207 the following new symbols are used: fts64_children, fts64_close,
4208 fts64_open, fts64_read and fts64_set.
4210 * getaddrinfo now detects certain invalid responses on an internal netlink
4211 socket. If such responses are received, an affected process will
4212 terminate with an error message of "Unexpected error <number> on netlink
4213 descriptor <number>" or "Unexpected netlink response of size <number> on
4214 descriptor <number>". The most likely cause for these errors is a
4215 multi-threaded application which erroneously closes and reuses the netlink
4216 file descriptor while it is used by getaddrinfo.
4218 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
4219 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
4220 unnecessary serialization of memory allocation requests across threads.
4221 The defect is now corrected. Users should see a substantial increase in
4222 the concurent throughput of allocation requests for applications which
4223 trigger this bug. Affected applications typically create and
4224 destroy threads frequently. (Bug 19048 was reported and analyzed by
4227 * There is now a --disable-timezone-tools configure option for disabling the
4228 building and installing of the timezone related utilities (zic, zdump, and
4229 tzselect). This is useful for people who build the timezone data and code
4230 independent of the GNU C Library.
4232 * The obsolete header <regexp.h> has been removed. Programs that require
4233 this header must be updated to use <regex.h> instead.
4235 * The obsolete functions bdflush, create_module, get_kernel_syms,
4236 query_module and uselib are no longer available to newly linked binaries;
4237 the header <sys/kdaemon.h> has been removed. These functions and header
4238 were specific to systems using the Linux kernel and could not usefully be
4239 used with the GNU C Library on systems with version 2.6 or later of the
4242 * Optimized string, wcsmbs and memory functions for IBM z13.
4243 Implemented by Stefan Liebler.
4245 * Newly linked programs that define a variable called signgam will no longer
4246 have it set by the lgamma, lgammaf and lgammal functions. Programs that
4247 require signgam to be set by those functions must ensure that they use the
4248 variable provided by the GNU C Library and declared in <math.h>, without
4249 defining their own copy.
4251 * The minimum GCC version that can be used to build this version of the GNU
4252 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
4253 still be used to compile programs using the GNU C Library.
4255 Security related changes:
4257 * An out-of-bounds value in a broken-out struct tm argument to strftime no
4258 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
4260 * The LD_POINTER_GUARD environment variable can no longer be used to disable
4261 the pointer guard feature. It is always enabled. Previously,
4262 LD_POINTER_GUARD could be used to disable security hardening in binaries
4263 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
4266 * An integer overflow in hcreate and hcreate_r could lead to an
4267 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
4269 * The catopen function no longer has unbounded stack usage. Reported by
4270 Max. (CVE-2015-8779)
4272 * The nan, nanf and nanl functions no longer have unbounded stack usage
4273 depending on the length of the string passed as an argument to the
4274 functions. Reported by Joseph Myers. (CVE-2014-9761)
4276 * A stack-based buffer overflow was found in libresolv when invoked from
4277 libnss_dns, allowing specially crafted DNS responses to seize control
4278 of execution flow in the DNS client. The buffer overflow occurs in
4279 the functions send_dg (send datagram) and send_vc (send TCP) for the
4280 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
4281 family. The use of AF_UNSPEC triggers the low-level resolver code to
4282 send out two parallel queries for A and AAAA. A mismanagement of the
4283 buffers used for those queries could result in the response of a query
4284 writing beyond the alloca allocated buffer created by
4285 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
4286 the overflow. Thanks to the Google Security Team and Red Hat for
4287 reporting the security impact of this issue, and Robert Holiday of
4288 Ciena for reporting the related bug 18665. (CVE-2015-7547)
4290 The following bugs are resolved with this release:
4292 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
4293 [887] math: Math library function "logb" and "nextafter" inconsistent
4294 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
4295 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
4296 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
4297 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
4299 [4404] localedata: German translation of "Alarm clock" is misleading
4300 [6799] math: nextafter() and nexttoward() doen't set errno on
4301 overflow/underflow errors
4302 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
4304 [10432] nis: _nss_nis_setnetgrent assertion failure
4305 [11460] libc: fts has no LFS support
4306 [12926] network: getaddrinfo()/make_request() may spin forever
4307 [13065] nptl: Race condition in pthread barriers
4308 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
4309 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
4311 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
4312 [14912] libc: Rename non-installed bits/*.h headers
4313 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
4314 [15367] math: Let gcc use __builtin_isinf
4315 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
4316 [15421] math: lgamma wrongly sets signgam for ISO C
4317 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
4318 FE_INVALID with argument out of range
4319 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
4321 [15786] dynamic-link: ifunc resolver functions can smash function
4323 [15918] math: Unnecessary check for equality in hypotf()
4324 [16061] localedata: Review / update transliteration data
4325 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
4327 [16141] time: strptime %z offset restriction
4328 [16171] math: drem should be alias of remainder
4329 [16296] math: fegetround is pure?
4330 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
4331 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
4333 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
4334 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
4336 [16422] math: [powerpc] math-float, math-double failing llrint tests with
4337 "Exception "Inexact" set" on ppc32
4338 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
4339 [16517] math: Missing underflow exception from tanf/tan/tanl
4340 [16519] math: Missing underflow exception from sinhf
4341 [16520] math: Missing underflow exception from tanhf
4342 [16521] math: Missing underflow exception from exp2
4343 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
4345 [16734] stdio: fopen calls mmap to allocate its buffer
4346 [16961] math: nan function incorrect handling of bad sequences
4347 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
4348 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
4349 [16985] locale: localedef: confusing error message when opening output
4351 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
4352 [17197] locale: Redundant shift character in iconv conversion output at
4354 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
4355 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
4356 [17250] dynamic-link: static linking breaks nss loading
4357 (getaddrinfo/getpwnam/etc...)
4358 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
4360 [17441] math: isnan() should use __builtin_isnan() in GCC
4361 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
4362 (related to lock elision)
4363 [17787] manual: Exponent on page 324 of the PDF ends prematurely
4364 [17886] time: strptime should be able to parse "Z" as a timezone with %z
4365 [17887] time: strptime should be able to parse "+01:00" style timezones
4366 [17905] libc: catopen() Multiple unbounded stack allocations
4368 [18084] libc: backtrace (..., 0) dumps core on x86
4369 [18086] libc: nice() sets errno to 0 on success
4370 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
4371 is too large (CVE-2015-8778)
4372 [18251] dynamic-link: SONAME missing when audit modules provides path
4373 [18265] libc: add attributes for wchar string and memory functions
4374 [18370] math: csqrt missing underflows
4375 [18421] libc: [hppa] read-only segment has dynamic relocations
4376 [18472] libc: Obsolete syscall wrappers should be compat symbols
4377 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
4378 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
4379 [18525] localedata: Remove locale timezone information
4380 [18560] libc: [powerpc] spurious bits/ipc.h definitions
4381 [18568] localedata: Update locale data to Unicode 8.0
4382 [18589] locale: sort-test.sh fails at random
4383 [18595] math: ctan, ctanh missing underflows
4384 [18604] libc: assert macro-expands its argument
4385 [18610] math: S390: fetestexcept() reports any exception if DXC-code
4386 contains a vector instruction exception.
4387 [18611] math: j1, jn missing errno setting on underflow
4388 [18618] localedata: sync Chechen locale definitions with other *_RU
4390 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
4391 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
4392 [18665] network: In send_dg, the recvfrom function is NOT always using the
4393 buffer size of a newly created buffer (CVE-2015-7547)
4394 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
4396 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
4398 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
4399 [18699] math: tilegx cproj() for various complex infinities does not yield
4401 [18724] libc: Harden put*ent functions against data injection
4402 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
4403 [18755] build: build errors with -DNDEBUG
4404 [18757] stdio: fmemopen fails to set errno on failure
4405 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
4407 [18781] libc: openat64 lacks O_LARGEFILE
4408 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
4409 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
4410 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
4411 [18790] math: [ldbl-128ibm] tanhl inaccurate
4412 [18795] libc: stpncpy fortification misses buffer lengths that are
4413 statically too large
4414 [18796] build: build fails for --disable-mathvec
4415 [18803] math: hypot missing underflows
4416 [18820] stdio: fmemopen may leak memory on failure
4417 [18823] math: csqrt spurious underflows
4418 [18824] math: fma spurious underflows
4419 [18825] math: pow missing underflows
4420 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
4421 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
4422 [18870] build: sem_open.c fails to compile with missing symbol
4424 [18872] stdio: Fix memory leak in printf_positional
4425 [18873] libc: posix_fallocate overflow check ineffective
4426 [18875] math: Excess precision leads incorrect libm
4427 [18877] libc: arm: mmap offset regression
4428 [18887] libc: memory corruption when using getmntent on blank lines
4429 [18918] localedata: hu_HU: change time to HH:MM:SS format
4430 [18921] libc: Regression: extraneous stat() and fstat() performed by
4432 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
4433 binaries (CVE-2015-8777)
4434 [18951] math: tgamma missing underflows
4435 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
4437 [18953] localedata: lt_LT: change currency symbol to the euro
4438 [18956] math: powf inaccuracy
4439 [18961] math: [i386] exp missing underflows
4440 [18966] math: [i386] exp10 missing underflows
4441 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
4442 [18969] build: multiple string test failures due to missing locale
4444 [18970] libc: Reference of pthread_setcancelstate in libc.a
4445 [18977] math: float / long double Bessel functions not in XSI POSIX
4446 [18980] math: i386 libm functions return with excess range and precision
4447 [18981] math: i386 scalb*, ldexp return with excess range and precision
4448 [18982] stdio: va_list and vprintf
4449 [18985] time: Passing out of range data to strftime() causes a segfault
4451 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
4452 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
4453 [19012] locale: iconv_open leaks memory on error path
4454 [19016] math: clog, clog10 inaccuracy
4455 [19018] nptl: Mangle function pointers in tls_dtor_list
4456 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
4457 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
4458 [19048] malloc: malloc: arena free list can become cyclic, increasing
4460 [19049] math: [powerpc] erfc incorrect zero sign
4461 [19050] math: [powerpc] log* incorrect zero sign
4462 [19058] math: [x86_64] Link fail with -fopenmp and -flto
4463 [19059] math: nexttoward overflow incorrect in non-default rounding modes
4464 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
4465 [19074] network: Data race in _res_hconf_reorder_addrs
4466 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
4467 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
4468 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
4470 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
4472 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
4473 [19086] manual: posix_fallocate64 documented argument order is wrong.
4474 [19088] math: lround, llround missing exceptions close to overflow
4476 [19094] math: lrint, llrint missing exceptions close to overflow threshold
4477 [19095] math: dbl-64 lrint incorrect for 64-bit long
4478 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
4479 [19124] dynamic-link: ld.so failed to build with older assmebler
4480 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
4481 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
4482 [19134] math: [powerpc32] lround, lroundf spurious exceptions
4483 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
4484 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
4485 pthread_setaffinity_np
4486 [19156] math: [ldbl-128] j0l spurious underflows
4487 [19164] nptl: tst-getcpu fails with many possible CPUs
4488 [19168] math: math/test-ildoubl and math/test-ldouble failure
4489 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
4490 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
4492 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
4493 (FE_NOMASK_ENV) do not clear SSE exceptions
4494 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
4495 _int_new_arena/reused_arena
4496 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
4497 [19201] math: dbl-64 remainder incorrect sign of zero result
4498 [19205] math: bits/math-finite.h conditions do not match math.h and
4500 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
4501 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
4502 for C99-based standards
4503 [19212] libc: features.h not -Wundef clean
4504 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
4506 [19214] libc: Family and model identification for AMD CPU's are incorrect.
4507 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
4508 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
4510 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
4511 "inexact" exceptions
4512 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
4514 [19242] libc: strtol incorrect in Turkish locales
4515 [19243] malloc: reused_arena can pick an arena on the free list, leading
4516 to an assertion failure and reference count corruption
4517 [19253] time: tzset() ineffective when temporary TZ did not include DST
4519 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
4520 [19270] math: [hppa] Shared libm missing __isnanl
4521 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
4522 MAP_HUGETLB and MAP_STACK defines
4523 [19313] nptl: Wrong __cpu_mask for x32
4524 [19347] libc: grantpt: try to force a specific gid even without pt_chown
4525 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
4526 [19350] math: [ldbl-128ibm] sinhl spurious overflows
4527 [19351] math: [ldbl-128ibm] logl inaccurate near 1
4528 [19363] time: x32: times() return value wrongly truncates/sign extends
4530 [19367] dynamic-link: Improve branch prediction on Silvermont
4531 [19369] network: Default domain name not reset by res_ninit when "search"
4532 / "domain" entry is removed from resolv.conf
4533 [19375] math: powerpc: incorrect results for POWER7 logb with negative
4535 [19385] localedata: bg_BG: time separator should be colon, not comma
4536 [19408] libc: linux personality syscall wrapper may erroneously return an
4537 error on 32-bit architectures
4538 [19415] libc: dladdr returns wrong names on hppa
4539 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
4540 IBM905, IBM907, and IBM909
4541 [19439] math: Unix98 isinf and isnan functions conflict with C++11
4542 [19443] build: build failures with -DDEBUG
4543 [19451] build: Make check fails on test-double-vlen2
4544 [19462] libc: Glibc failed to build with -Os
4545 [19465] math: Wrong code with -Os
4546 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
4548 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
4550 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
4551 [19486] math: S390: Math tests fail with "Exception Inexact set".
4552 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
4553 [19550] libc: [mips] mmap negative offset handling inconsistent with other
4555 [19590] math: Fail to build shared objects that use libmvec.so functions.
4559 * The following bugs are resolved with this release:
4561 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
4562 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
4563 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
4564 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
4565 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
4566 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
4567 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
4568 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
4569 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
4570 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
4571 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
4572 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
4573 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
4574 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
4575 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
4576 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
4577 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
4578 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
4579 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
4580 18657, 18676, 18694, 18696, 18887.
4582 * Cache information can be queried via sysconf() function on s390 e.g. with
4583 _SC_LEVEL1_ICACHE_SIZE as argument.
4585 * A buffer overflow in gethostbyname_r and related functions performing DNS
4586 requests has been fixed. If the NSS functions were called with a
4587 misaligned buffer, the buffer length change due to pointer alignment was
4588 not taken into account. This could result in application crashes or,
4589 potentially arbitrary code execution, using crafted, but syntactically
4590 valid DNS responses. (CVE-2015-1781)
4592 * The time zone file parser has been made more robust against crafted time
4593 zone files, avoiding heap buffer overflows related to the processing of
4594 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
4595 large time zone data files. Overly long time zone specifiers in the TZ
4596 variable no longer result in stack overflows and crashes.
4598 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
4599 for LD and GD on x86 and x86-64, has been implemented. You will need
4600 binutils-2.24 or later to enable this optimization.
4602 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
4603 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
4604 Hat). These updates cause user visible changes, such as the fix for bug
4607 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
4608 and getXXbyYY NSS calls for the same database, causing a denial-of-service
4609 condition in some applications.
4611 * Added vector math library named libmvec with the following vectorized x86_64
4612 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
4614 The library can be disabled with --disable-mathvec. Use of the functions is
4615 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
4616 Shared library libmvec.so is linked in as needed when using -lm (no need to
4617 specify -lmvec explicitly for not static builds).
4618 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
4620 * A new fmemopen implementation has been added with the goal of POSIX
4621 compliance. The new implementation fixes the following long-standing
4622 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
4623 old implementation is still present for use be by existing binaries.
4625 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
4626 releases. It has been fixed to match 2.19 and older, but binaries built
4627 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
4629 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
4630 Contributed by Roland McGrath (Google).
4632 * The header <regexp.h> is deprecated, and will be removed in a future
4633 release. Use of this header will trigger a deprecation warning.
4634 Application developers should update their code to use <regex.h> instead.
4636 This header was formerly part of SUS, but was deprecated in 1994 and
4637 removed from the standard in 2001. Also, the glibc implementation
4638 leaks memory. See BZ#18681 for more details.
4642 * The following bugs are resolved with this release:
4644 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
4645 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
4646 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
4647 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
4648 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
4649 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
4650 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
4651 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
4652 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
4653 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
4656 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
4657 too little memory for the to-be-scanned arguments and overflow the
4658 allocated buffer. The implementation now correctly computes the required
4659 buffer size when using malloc, and switches to malloc from alloca as
4662 * A new semaphore algorithm has been implemented in generic C code for all
4663 machines. Previous custom assembly implementations of semaphore were
4664 difficult to reason about or ensure that they were safe. The new version
4665 of semaphore supports machines with 64-bit or 32-bit atomic operations.
4666 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
4667 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
4669 * Port to Altera Nios II has been contributed by Mentor Graphics.
4671 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
4672 implementations for powerpc64/powerpc64le.
4673 Implemented by Adhemerval Zanella (IBM).
4675 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
4676 and powerpc64le. This may improve lock scaling of existing programs on
4677 HTM capable systems. The lock elision code is only enabled with
4678 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
4679 powerpc will issue a transaction abort on every syscall to avoid side
4680 effects being visible outside transactions.
4682 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
4683 AArch64. Contributed by ARM Ltd.
4685 * i386 memcpy functions optimized with SSE2 unaligned load/store.
4687 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
4688 under certain input conditions resulting in the execution of a shell for
4689 command substitution when the application did not request it. The
4690 implementation now checks WRDE_NOCMD immediately before executing the
4691 shell and returns the error WRDE_CMDSUB as expected.
4693 * CVE-2012-3406 printf-style functions could run into a stack overflow when
4694 processing format strings with a large number of format specifiers.
4696 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
4697 infinite loop if the DNS response contained a PTR record of an unexpected
4700 * The minimum GCC version that can be used to build this version of the GNU
4701 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
4702 still be used to compile programs using the GNU C Library.
4704 * The GNU C Library is now built with -Werror by default. This can be
4705 disabled by configuring with --disable-werror.
4707 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
4709 * The obsolete sigvec function has been removed. This was the original
4710 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
4711 programs have been using instead for about 25 years. Of course, ABI
4712 compatibility for old binaries using sigvec remains intact.
4714 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
4715 with newer versions of bison.
4717 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
4718 The original MIPS o32 hard-float ABI requires an FPU where double-precision
4719 registers overlay two consecutive single-precision registers. MIPS32R2
4720 introduced a new FPU mode (FR=1) where double-precision registers extend the
4721 corresponding single-precision registers which is incompatible with the
4722 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
4723 require the use of FR=1 making a transition necessary. New o32 ABI
4724 extensions enable users to migrate over time from the original o32 ABI
4725 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
4726 tracks the ABI of any loaded object and verifies that new objects are
4727 compatible. Mode transitions will also be requested as required and
4728 unsupportable objects will be rejected. The ABI checks include both soft and
4729 hard float ABIs for o32, n32 and n64.
4731 GCC 5 with GNU binutils 2.25 onwards:
4732 It is strongly recommended that all o32 system libraries are built using the
4733 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
4734 with the original and all new o32 ABI extensions. Configure a MIPS GCC
4735 compiler using --with-fp-32=xx to set this by default.
4739 * The following bugs are resolved with this release:
4741 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
4742 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
4743 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
4744 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
4745 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
4746 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
4747 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
4748 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
4749 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
4750 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
4751 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
4752 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
4753 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
4754 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
4755 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
4757 * Reverted change of ABI data structures for s390 and s390x:
4758 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
4759 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
4760 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
4761 are preserved pointing straight to the same implementation as the old ones.
4762 Given that, new callers will simply provide a too-big buffer to these
4763 functions. Any applications/libraries out there that embed jmp_buf or
4764 ucontext_t in an ABI-relevant data structure that have already been rebuilt
4765 against 2.19 headers will have to rebuilt again. This is necessary in any
4766 case to revert the breakage in their ABI caused by the glibc change.
4768 * Support for file description locks is added to systems running the
4769 Linux kernel. The standard file locking interfaces are extended to
4770 operate on file descriptions, not file descriptors, via the use of
4771 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
4772 are associated with an open file instead of a process.
4774 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
4776 * The minimum Linux kernel version that this version of the GNU C Library
4777 can be used with is 2.6.32.
4779 * Running the testsuite no longer terminates as soon as a test fails.
4780 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
4781 with PASS or FAIL lines for individual tests. A summary of the results is
4782 printed, including a list of failing lists, and "make check" exits with
4783 error status if there were any unexpected failures. "make check
4784 stop-on-test-failure=y" may be used to keep the old behavior.
4786 * The am33 port, which had not worked for several years, has been removed
4789 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
4790 supported; they now act the same as _DEFAULT_SOURCE (but generate a
4791 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
4792 conflicted with POSIX (support for which was removed in 2.19), the
4793 interfaces those macros enabled remain available when compiling with
4794 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
4795 test macros defined.
4797 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
4799 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
4800 This may improve lock scaling of existing programs on TX capable systems.
4801 The lock elision code is only built with --enable-lock-elision=yes and
4802 then requires a GCC version supporting the TX builtins. With lock elision
4803 default mutexes are elided via __builtin_tbegin, if the cpu supports
4804 transactions. By default lock elision is not enabled and the elision code
4807 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
4808 copy the path argument. This allowed programs to cause posix_spawn to
4809 deference a dangling pointer, or use an unexpected pathname argument if
4810 the string was modified after the posix_spawn_file_actions_addopen
4813 * All supported architectures now use the main glibc sysdeps directory
4814 instead of some being in a separate "ports" directory (which was
4815 distributed separately before glibc 2.17).
4817 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
4818 On configurations that support it (all Linux configurations), it's now
4819 used regardless of the --enable-add-ons switch to configure. It is no
4820 longer possible to build such configurations without pthreads support.
4822 * Locale names, including those obtained from environment variables (LANG
4823 and the LC_* variables), are more tightly checked for proper syntax.
4824 setlocale will now fail (with EINVAL) for locale names that are overly
4825 long, contain slashes without starting with a slash, or contain ".." path
4826 components. (CVE-2014-0475) Previously, some valid locale names were
4827 silently replaced with the "C" locale when running in AT_SECURE mode
4828 (e.g., in a SUID program). This is no longer necessary because of the
4831 * On x86-64, the dynamic linker's lazy-binding support is now compatible
4832 with application code using Intel MPX instructions. (With all previous
4833 versions, the MPX register state could be clobbered when making calls
4834 into or out of a shared library.) Note that while the new dynamic
4835 linker is compatible with all known x86 hardware whether or not it
4836 supports Intel MPX, some x86 instruction-set emulators might fail to
4837 handle the new instruction encodings. This is known to affect Valgrind
4838 versions up through 3.9 (but will be fixed in the forthcoming 3.10
4839 release), and might affect other tools that do instruction emulation.
4841 * Support for loadable gconv transliteration modules has been removed.
4842 The support for transliteration modules has been non-functional for
4843 over a decade, and the removal is prompted by security defects. The
4844 normal gconv conversion modules are still supported. Transliteration
4845 with //TRANSLIT is still possible, and the //IGNORE specifier
4846 continues to be supported. (CVE-2014-5119)
4848 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
4849 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
4850 resulting a denial-of-service security vulnerability in applications which
4851 use functions related to iconv. (CVE-2014-6040)
4855 * The following bugs are resolved with this release:
4857 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
4858 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
4859 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
4860 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
4861 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
4862 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
4863 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
4864 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
4865 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
4866 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
4867 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
4868 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
4869 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
4870 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
4871 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
4872 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
4873 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
4874 16431, 16453, 16474, 16506, 16510, 16529
4876 * Slovenian translations for glibc messages have been contributed by the
4877 Translation Project's Slovenian team of translators.
4879 * The public headers no longer use __unused nor __block. This change is to
4880 support compiling programs that are derived from BSD sources and use
4881 __unused internally, and to support compiling with Clang's -fblock
4882 extension which uses __block.
4884 * CVE-2012-4412 The strcoll implementation caches indices and rules for
4885 large collation sequences to optimize multiple passes. This cache
4886 computation may overflow for large collation sequences and may cause a
4887 stack or buffer overflow. This is now fixed to use a slower algorithm
4888 which does not use a cache if there is an integer overflow.
4890 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
4891 rules for large collation sequences to optimize multiple passes and falls
4892 back to alloca if malloc fails, resulting in a possible stack overflow.
4893 The implementation now falls back to an uncached collation sequence lookup
4896 * CVE-2013-4788 The pointer guard used for pointer mangling was not
4897 initialized for static applications resulting in the security feature
4898 being disabled. The pointer guard is now correctly initialized to a
4899 random value for static applications. Existing static applications need
4900 to be recompiled to take advantage of the fix (bug 15754).
4902 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
4903 to the d_name member of struct dirent, or omit the terminating NUL
4904 character. (Bugzilla #14699).
4906 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
4907 aligned_alloc functions could allocate too few bytes or corrupt the
4908 heap when passed very large allocation size values (Bugzilla #15855,
4911 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
4912 for AF_INET6 has been fixed (Bugzilla #16072).
4914 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
4915 pap_CW, quz_PE, the_NP.
4917 * Substantially revised locales: gd_GB, ht_HT
4919 * The LC_ADDRESS field was updated to support country_car for almost all
4922 * ISO 1427 definitions were updated.
4924 * ISO 3166 definitions were updated.
4926 * The localedef utility now supports --big-endian and --little-endian
4927 command-line options to generate locales for a different system from that
4928 for which the C library was built.
4930 * Binary locale files now only depend on the endianness of the system for
4931 which they are generated and not on other properties of that system. As a
4932 consequence, binary files generated with new localedef may be incompatible
4933 with old versions of the GNU C Library, and binary files generated with
4934 old localedef may be incompatible with this version of the GNU C Library,
4935 in the following circumstances:
4937 + Locale files may be incompatible on m68k systems.
4939 + Locale archive files (but not separate files for individual locales) may
4940 be incompatible on systems where plain "char" is signed.
4942 * The configure option --disable-versioning has been removed. Builds with
4943 --disable-versioning had not worked for several years.
4945 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
4946 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
4948 * SystemTap probes for malloc have been introduced.
4950 * SystemTap probes for slow multiple precision fallback paths of
4951 transcendental functions have been introduced.
4953 * Support for powerpc64le has been added.
4955 * The soft-float powerpc port now supports e500 processors.
4957 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
4959 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
4960 set of header declarations that are enabled by default, even when other
4961 feature test macros or compiler options such as -std=c99 would otherwise
4962 disable some of those declarations.
4964 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
4965 conflict with POSIX. The libbsd-compat library (which was a dummy library
4966 that did nothing) has also been removed.
4968 * Preliminary documentation about Multi-Thread, Async-Signal and
4969 Async-Cancel Safety has been added.
4971 * Change of ABI data structures for s390 and s390x:
4972 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
4973 allow for future hardware extensions. All library functions that accept or
4974 return these structures were versioned in order to provide backwards
4975 compatibility with existing code. However, not all cases can be handled
4976 with interface versioning. If an application embeds either structure into
4977 another structure and that structure is passed to another compilation unit
4978 which expects the newer larger-sized object then any access to the new
4979 fields will result in undefined behaviour. Similarly any access to fields
4980 that were moved by the enlarging of the structures will cause undefined
4981 behaviour. To fix the undefined behaviour all objects that are part of the
4982 final in-memory image must agree on the size of structures, and this may
4983 require recompilation.
4987 * The following bugs are resolved with this release:
4989 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
4990 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
4991 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
4992 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
4993 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
4994 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
4995 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
4996 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
4997 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
4998 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
4999 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
5000 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
5001 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
5004 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
5005 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
5006 Distributions can re-enable building and using pt_chown via the new configure
5007 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
5008 considerable security risks and should only be used if the distribution
5009 understands and accepts the risks.
5011 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
5014 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
5015 fixed (Bugzilla #15330).
5017 * Add support for calling C++11 thread_local object destructors on thread
5018 and program exit. This needs compiler support for offloading C++11
5019 destructor calls to glibc.
5021 * Improved worst case performance of libm functions with double inputs and
5024 * Support for priority inherited mutexes in pthread condition variables on
5025 non-x86 architectures.
5027 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
5029 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
5031 * Optimized string functions for ARM. Implemented by Will Newton and
5034 * Optimized libm functions for SPARC. Implemented by David S. Miller.
5036 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
5039 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
5040 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
5042 * Added a benchmark framework to track performance of functions in glibc.
5044 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
5045 It is based on draft TS 18661 and currently enabled as a GNU extension.
5047 * On Linux, the clock function now uses the clock_gettime system call
5048 for improved precision, rather than old times system call.
5050 * Added support for version-3 tz format files. This is needed when using
5051 the tz database release 2013e or later, and affects a few unusual cases --
5052 currently only TZ='America/Godthab' for time stamps after 2037.
5054 * Added new API functions pthread_getattr_default_np and
5055 pthread_setattr_default_np to get and set the default pthread
5056 attributes of a process.
5058 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
5059 This may improve lock scaling of existing programs on TSX capable systems.
5060 When the --enable-lock-elision=yes parameter is specified at configure
5061 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
5064 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
5065 availability). Implemented by Ryan S. Arnold.
5067 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
5071 * The following bugs are resolved with this release:
5073 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
5074 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
5075 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
5076 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
5077 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
5078 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
5079 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
5080 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
5081 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
5082 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
5083 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
5084 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
5085 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
5086 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
5087 14879, 14889, 14893, 14898, 14914.
5089 * Optimization of memcpy for MIPS.
5091 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
5092 EMFILE has been fixed (Bugzilla #14889).
5094 * The add-on ports collection is now distributed in the "ports" subdirectory
5095 of the main GNU C Library distribution, rather than separately.
5097 * Port to ARM AArch64 contributed by Linaro.
5099 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
5100 Optimized versions of memcpy, memset, and memcmp added for System z10 and
5102 Implemented by Andreas Krebbel.
5104 * The new function secure_getenv allows secure access to the environment,
5105 returning NULL if running in a SUID/SGID process. This function replaces
5106 the internal function __secure_getenv.
5108 * SystemTap static probes have been added into the dynamic linker.
5109 Implemented by Gary Benson.
5111 * Optimizations of string functions strstr, strcasestr and memmem.
5112 Implemented by Maxim Kuvyrkov.
5114 * The minimum Linux kernel version that this version of the GNU C Library
5115 can be used with is 2.6.16.
5117 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
5118 powerpc POWER7. Implemented by Will Schmidt.
5120 * New configure option --disable-nscd builds the C library such that it
5121 never attempts to contact the Name Service Caching Daemon (nscd).
5122 New configure option --disable-build-nscd avoids building nscd itself;
5123 this is the default if --disable-nscd is used.
5125 * Improved support for cross-compilation, including cross-testing and
5126 bootstrap builds without a previously built glibc.
5128 * Several testsuite tests are now able to test multiple IFUNC variants of an
5129 interface, rather than just testing the one that would be chooen by
5132 * New configure options --with-bugurl and --with-pkgversion, for
5133 distributors to use to embed their bug-reporting and package version
5134 information in --help and --version output.
5136 * The ttyname and ttyname_r functions on Linux now fall back to searching for
5137 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
5138 allows creation of chroots without the procfs mounted on /proc.
5140 * The `crypt' function now fails if passed salt bytes that violate the
5141 specification for those values. On Linux, the `crypt' function will
5142 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
5143 enabled, and fail on encrypted strings using the MD5 or DES algorithm
5144 when the mode is enabled.
5146 * The `clock_*' suite of functions (declared in <time.h>) is now available
5147 directly in the main C library. Previously it was necessary to link with
5148 -lrt to use these functions. This change has the effect that a
5149 single-threaded program that uses a function such as `clock_gettime' (and
5150 is not linked with -lrt) will no longer implicitly load the pthreads
5151 library at runtime and so will not suffer the overheads associated with
5152 multi-thread support in other code such as the C++ runtime library.
5154 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
5159 * The following bugs are resolved with this release:
5161 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
5162 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
5163 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
5164 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
5165 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
5166 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
5167 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
5168 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
5169 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
5170 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
5171 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
5172 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
5173 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
5174 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
5175 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
5176 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
5177 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
5178 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
5179 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
5180 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
5181 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
5182 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
5185 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
5186 configuring glibc with:
5187 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
5188 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
5189 Implemented by H.J. Lu.
5193 + define static_assert
5195 + do not declare gets
5197 + declare at_quick_exit and quick_exit also for ISO C11
5199 + aligned_alloc. NB: The code is deliberately allows the size parameter
5200 to not be a multiple of the alignment. This is a moronic requirement
5201 in the standard but it is only a requirement on the caller, not the
5204 + timespec_get added
5206 + uchar.h support added
5208 + CMPLX, CMPLXF, CMPLXL added
5210 Implemented by Ulrich Drepper.
5212 * Support for the IA-64 has been moved to ports.
5214 * Remove support for anything but ELF binary format
5216 * Checking versions of poll, ppoll added.
5217 Implemented by Ulrich Drepper.
5219 * More generic and 64-bit performance optimizations to math functions.
5220 Implemented by Ulrich Drepper.
5222 * New configure option --enable-obsolete-rpc makes the deprecated RPC
5223 headers and functions available at compile time as they were before
5224 version 2.14. This option will be removed at some time in the future
5225 after the TI-RPC library becomes fully sufficient for the needs of
5226 existing applications.
5228 * Compatibility code for Linux kernel versions before 2.4 has been removed.
5229 Note that glibc is not expected to work with any Linux kernel version
5232 * New header <sys/auxv.h> and function getauxval allowing easy access to
5233 the AT_* key-value pairs passed from the Linux kernel. The header also
5234 defines the HWCAP_* bits associated with the AT_HWCAP key.
5236 * New locales: mag_IN
5238 * New configure option --enable-systemtap builds SystemTap static probes
5239 into libc for setjmp and longjmp and into libpthread for various operations.
5240 So far the setjmp/longjmp probes and some of the libpthread probes are
5241 provided only for i*86 and x86_64.
5242 Implemented by Roland McGrath and Rayson Ho.
5244 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
5246 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
5249 * More optimized functions for SPARC. Implemented by David S. Miller.
5251 * Improved support for cross-compilation, especially bootstrap builds
5252 without a previously built glibc.
5254 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
5255 Chris Metcalf from Tilera.
5257 * Support for the old ARM ABI has been removed from ports. Only the EABI is
5258 now supported for ARM processors.
5260 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
5261 as the name of the dynamic linker, to distinguish it from the
5262 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
5264 * Support for CRIS has been removed from ports.
5266 * A new class of installed header has been documented for low-level
5267 platform-specific functionality. PowerPC added the first instance with a
5268 function to provide time base register access. Contributed by Tulio
5269 Magno Quites Machado Filho.
5271 * ix86 configurations now install header files that are consistent with
5272 what x86-64 configurations install. These same header files can be used
5273 for -m32, -m64, or -mx32 builds.
5274 Contributed by H.J. Lu.
5276 * Math library bug fixes. A thorough audit of all open math library bugs was
5277 conducted by Joseph Myers. Significant progress was made on many math
5278 library bugs resulting in more accurate exceptions and function results.
5279 Many thanks to all those that contributed including Andreas Jaeger for his
5280 patch review and work on the x87 trigonometric instruction issues.
5282 * Timezone data is no longer installed. Timezone-related binaries and scripts
5283 will continue to be installed. Users should obtain their timezone data from
5284 their distribution provider or from the tzdata package at
5285 <ftp://munnari.oz.au/pub/>.
5289 * The following bugs are resolved with this release:
5291 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
5292 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
5293 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
5294 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
5295 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
5296 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
5297 13484, 13506, 13515, 13523, 13524, 13538, 13540
5299 * New program pldd to list loaded object of a process
5300 Implemented by Ulrich Drepper.
5302 * Add nss_db support back to glibc. No more dependency on Berkeley db
5303 and support for initgroups lookups.
5304 Implemented by Ulrich Drepper.
5306 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
5307 Contributed by HJ Lu.
5309 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
5310 Contributed by HJ Lu.
5312 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
5313 on x86-32 and x86-64.
5314 Contributed by Liubov Dmitrieva.
5316 * Optimized strchr and strrchr for SSE on x86-32.
5317 Contributed by Liubov Dmitrieva.
5319 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
5320 for x86-64 and x86-32.
5321 Contributed by Liubov Dmitrieva.
5323 * New interfaces: scandirat, scandirat64
5324 Implemented by Ulrich Drepper.
5326 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
5327 Implemented by Ulrich Drepper.
5329 * nscd now also caches the netgroup database.
5330 Implemented by Ulrich Drepper.
5332 * Integrate libm with gcc's -ffinite-math-only option.
5333 Implemented by Ulrich Drepper.
5335 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
5336 to math functions. Implemented by Ulrich Drepper.
5338 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
5339 Implemented by Ulrich Drepper.
5341 * New Linux interfaces: process_vm_readv, process_vm_writev
5343 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
5344 Implemented by Ulrich Drepper.
5346 * Optimized nearbyint and strcasecmp for PPC.
5347 Implemented by Adhemerval Zanella.
5349 * New locales: bho_IN, unm_US, es_CU, ta_LK
5353 * The following bugs are resolved with this release:
5355 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
5356 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
5357 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
5358 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
5359 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
5360 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
5361 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
5362 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
5363 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
5364 12795, 12811, 12813, 12814, 12841
5366 * The RPC implementation in libc is obsoleted. Old programs keep working
5367 but new programs cannot be linked with the routines in libc anymore.
5368 Programs in need of RPC functionality must be linked against TI-RPC.
5369 The TI-RPC implementation is IPv6 enabled and there are other benefits.
5371 Visible changes of this change include (obviously) the inability to link
5372 programs using RPC functions without referencing the TI-RPC library and the
5373 removal of the RPC headers from the glibc headers.
5374 Implemented by Ulrich Drepper.
5376 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
5377 syncfs, setns, sendmmsg
5379 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
5380 yue_HK, lij_IT, mhr_RU
5382 * New encodings: CP770, CP771, CP772, CP773, CP774
5384 * New program sotruss to trace calls through PLTs
5385 Implemented by Ulrich Drepper.
5387 * The malloc hook implementation is marked deprecated and will be removed
5388 from the default implementation in the next version. The design never
5389 worked ever since the introduction of threads. Even programs which do
5390 not create threads themselves can use multiple threads created internally.
5394 * The following bugs are resolved with this release:
5396 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
5397 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
5398 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
5399 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
5402 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
5404 * POWER7 optimizations: memset, memcmp, strncmp
5406 * New optimized string functions for x86-64: strnlen (SSE2),
5407 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
5408 Implemented by Ulrich Drepper.
5412 * The following bugs are resolved with this release:
5414 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
5415 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
5416 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
5417 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
5418 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
5419 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
5420 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
5421 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
5423 * New interfaces: pthread_getname_np, pthread_setname_np
5425 * New Linux interface: recvmmsg
5427 * STT_GNU_IFUNC implemented for Sparc by David Miller.
5429 * The dynamic linker now recognizes supported ABI versions from the
5430 EI_ABIVERSION field in the ELF header.
5431 Implemented by Ulrich Drepper.
5433 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
5434 will not be used to fill in password fields in the passwd.byname replies.
5435 Instead it is used to synthesize the shadow.byname table, should it be
5436 missing. This is a useful mode in some installations involving Solaris.
5437 Implemented by Ulrich Drepper.
5439 * New locales: kok_IN, sq_MK, cv_RU
5443 * The following bugs are resolved with this release:
5445 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
5446 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
5447 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
5448 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
5449 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
5450 10789, 10817, 10823, 10840, 10847
5452 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
5454 Implemented by Ulrich Drepper.
5456 * Checking version of longjmp added that fails if an uninitialized stack
5457 frame would be created. Implemented by Ulrich Drepper.
5459 * STT_GNU_IFUNC is now supported in static executables.
5460 Implemented by H.J. Lu.
5462 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
5464 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
5465 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
5466 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
5467 Contributed by H.J. Lu.
5469 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
5470 Implemented by Ulrich Drepper.
5472 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
5474 Contributed by H.J. Lu.
5476 * Support for fma instruction in AVX on x86-64.
5477 Implemented by H.J. Lu and Ulrich Drepper.
5479 * AVX support in x86-64 auditing support in ld.so.
5480 Implemented by H.J. Lu.
5482 * STB_GNU_UNIQUE support added.
5483 Implemented by Ulrich Drepper.
5485 * Implement second fallback mode for optimized DNS lookup for even more
5486 broken environments. If two requests from the same port are not
5487 handled correctly close the socket and open a new one before sending
5488 the second request. The 'single-request-reopen' option in /etc/resolv.conf
5489 can be used to select this mode right away, instead of rediscovering the
5490 necessity is every process again.
5491 Implemented by Ulrich Drepper.
5493 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
5494 Implemented by Adam Tkac.
5496 * Optimized iconv conversions for S390x.
5497 Implemented by Andreas Krebbel.
5499 * Using condvars with PI mutexes is now more efficient due to kernel
5500 support for requeueing to PI futexes. NPTL support added for x86-64.
5501 Implemented by Ulrich Drepper.
5503 * New locales: ps_AF, my_MM
5507 * The following bugs are resolved with this release:
5509 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
5510 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
5511 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
5512 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
5513 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
5515 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
5516 Implemented by Ulrich Drepper.
5518 * New Linux interfaces: accept4, fallocate, fallocate64.
5519 Implemented by Ulrich Drepper.
5521 * Correct declarations of string function when used in C++ code. This
5522 could lead to compile errors for invalid C++ code.
5524 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
5527 * New POSIX 2008 interface: psiginfo
5528 Implemented by Ulrich Drepper.
5530 * New ISO C++1x interfaces: quick_exit, at_quick_exit
5531 Implemented by Ulrich Drepper.
5533 * Support for selecting between multiple function definitions at runtime
5534 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
5536 * The libcrypt library can now use the hash function implementations in
5537 NSS. Implemented by Ulrich Drepper.
5539 * The malloc implementation can be compiled to be less memory efficient
5540 but higher performing in multi-threaded programs.
5541 Implemented by Ulrich Drepper.
5543 * New locales: nan_TW@latin, ks_IN
5545 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
5546 Implemented by Ulrich Drepper.
5548 * Extended printf hook support. It is possible to use user-defined types
5549 and extend existing format specifiers.
5550 Implemented by Ulrich Drepper.
5552 * Handling for group shadow files has been added.
5553 Implemented by Ulrich Drepper.
5555 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
5556 servers (the case, e.g., for some people using the built-in DNS
5557 server in ADSL modems/routers). There is a once-per-process timeout
5558 in case of a broken server. To avoid it, users can run nscd or put
5559 'options single-request' in /etc/resolv.conf.
5560 Implemented by Ulrich Drepper.
5564 * The following bugs are resolved with this release:
5566 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447,
5567 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712,
5568 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839,
5569 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955,
5570 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029
5572 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
5573 up at the same time. Implemented by Ulrich Drepper.
5575 * TLS descriptors for LD and GD on x86 and x86-64.
5576 Implemented by Alexandre Oliva.
5578 * getaddrinfo now handles DCCP and UDPlite.
5579 Implemented by Ulrich Drepper.
5581 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
5582 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
5583 Implemented by Ulrich Drepper.
5585 * New implementation of memmem, strstr, and strcasestr which is O(n).
5586 Implemented by Eric Blake.
5588 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
5590 * Implement "e" option for popen to open file descriptor with the
5591 close-on-exec flag set. Implemented by Ulrich Drepper.
5593 * Implement "b" mode for fmemopen. In this mode writes writes don't
5594 implicitly add a NUL byte and seeks from the end of the buffer really
5595 use the buffer end, not the string length as the basis.
5596 Implemented by Ulrich Drepper.
5598 * Many functions, exported and internal, now atomically set the close-on-exec
5599 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
5601 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
5603 Implemented by Pravin Satpute.
5605 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
5609 * The following bugs are resolved with this release:
5611 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
5612 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
5613 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
5614 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
5615 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
5616 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
5617 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
5619 * New locales: bo_CN, bo_IN, shs_CA.
5621 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
5623 * Sorting rules for some Indian languages (Devanagari and Gujarati).
5624 Implemented by Pravin Satpute.
5626 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
5628 * nscd caches now all timeouts for DNS entries
5629 Implemented by Ulrich Drepper.
5631 * nscd is more efficient and wakes up less often.
5632 Implemented by Ulrich Drepper.
5634 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
5635 vdprintf, and obstack_vprintf.
5636 Implemented by Jakub Jelinek.
5638 * Faster memset for x86-64.
5639 Implemented by Harsha Jagasia and H.J. Lu.
5641 * Faster memcpy on x86.
5642 Implemented by Ulrich Drepper.
5644 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
5645 Implemented by Ulrich Drepper.
5647 * Faster sqrt and sqrtf implemention for some PPC variants.
5648 Implemented by Steven Munroe.
5652 * The following bugs are resolved with this release:
5654 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
5655 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
5656 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
5657 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
5658 5071, 5103, 5104, 5112, 5113, 5184, 5186
5660 * More checking functions: fread, fread_unlocked, open*, mq_open.
5661 Implemented by Jakub Jelinek and Ulrich Drepper.
5663 * Extend fortification to C++. Implemented by Jakub Jelinek.
5665 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
5666 by not recognizing 'a' as a modifier when those specs are requested.
5667 Implemented by Jakub Jelinek.
5669 * PPC optimizations to math and string functions.
5670 Implemented by Steven Munroe.
5672 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
5673 options to be passed. Implemented by Ulrich Drepper.
5675 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
5677 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
5678 Implemented by Ulrich Drepper.
5680 * Handle private futexes in the NPTL implementation.
5681 Implemented by Jakub Jelinek and Ulrich Drepper.
5683 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
5684 Implemented by Roland McGrath and Ulrich Drepper.
5686 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
5688 * SHA-256 and SHA-512 based password encryption.
5689 Implemented by Ulrich Drepper.
5691 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
5692 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
5695 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
5696 Implemented by Ulrich Drepper.
5700 * The following bugs are resolved with this release:
5702 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
5703 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
5704 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
5705 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
5706 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
5707 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
5708 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
5711 * New Linux interfaces: epoll_pwait, sched_getcpu.
5713 * New generic interfaces: strerror_l.
5715 * nscd can now cache the services database. Implemented by Ulrich Drepper.
5719 * The following bugs are resolved with this release:
5721 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
5722 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
5723 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
5724 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
5725 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
5726 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
5727 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
5728 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
5729 3225, 3251, 3252, 3253, 3273
5731 * For Linux, the sorting of addresses returned by getaddrinfo now also
5732 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
5733 Implemented by Ulrich Drepper.
5735 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
5736 Implemented by Ulrich Drepper.
5738 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
5740 * New iconv module for MIK. Contributed by Alexander Shopov.
5742 * For sites with broken group and/or passwd database, the auto-propagate
5743 option of nscd can prevent creating ID lookup entries from the results
5744 of a name lookup and vice versa. This usually is no problem but some
5745 site might have problems with the default behavior.
5746 Implemented by Ulrich Drepper.
5748 * Iterating over entire database in NIS can be slow. With the
5749 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
5750 to trade time for memory. The entire database will be read at once.
5751 Implemented by Ulrich Drepper.
5753 * The interfaces introduced in RFC 3542 have been implemented by
5756 * Support for the new ELF hash table format was added by Ulrich Drepper.
5758 * Support for priority inheritance mutexes added by Jakub Jelinek and
5761 * Support for priority protected mutexes added by Jakub Jelinek.
5763 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
5764 or_IN, csb_PL, fy_NL, sr_ME.
5768 * More overflow detection functions.
5770 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
5771 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
5773 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
5774 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
5775 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
5776 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
5777 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
5778 by Masahide Washizawa.
5780 * It is now possible to install audit libraries for the dynamic linker using
5781 LD_AUDIT. Implemented by Ulrich Drepper.
5783 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
5784 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
5785 For a libc and libpthread that works well on Linux 2.4 kernels, we
5786 recommend using the stable 2.3 branch.
5788 * The new function open_wmemstream acts like open_memstream,
5789 but uses a wchar_t wide character buffer.
5791 * The new function ppoll is an improved version of poll, similar to pselect.
5793 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
5794 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
5795 renameat, unlinkat, linkat, symlinkat, readlinkat.
5797 * New Linux kernel system calls: unshare,
5798 inotify_init, inotify_add_watch, inotify_rm_watch.
5800 * The euidaccess function is now also known by the alias eaccess,
5801 for compatibility with some other systems.
5803 * Timezone data updated to 2006b version.
5807 * The following bugs are resolved with this release:
5809 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
5810 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
5811 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
5812 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
5813 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
5814 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
5816 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5818 * As of this release, GCC 4 can be used to compile the C Library.
5820 * Timezone data updated to 2005m version.
5824 * The following bugs are resolved with this release:
5826 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
5827 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
5828 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
5829 777, 787, 821, 822, 823, 825
5831 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5835 * Support for RFC 3678. Real implementations exist only for Linux so far.
5836 Implemented by Ulrich Drepper.
5838 * nscd can now cache entries persistently. Expiring entries are reloaded.
5839 For speedups the cache can be shared in memory with client processes.
5840 Implemented by Ulrich Drepper.
5842 * nscd can now perform SELinux checks.
5843 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
5845 * getaddrinfo queries are now cached. Canonical name lookup is performed
5847 Implemented by Ulrich Drepper.
5849 * The nothrow function attribute is used when headers are used by gcc when
5850 compiling C code. This can avoid significant amounts of exception
5853 * The malloc functions perform more error checking and are stricter when
5854 it comes to reacting on errors. The default action is to terminate
5855 the process after showing an error message. Implemented by Ulrich Drepper.
5857 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
5858 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
5860 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
5861 namespaces using the new function dlmopen(). This feature is of course,
5862 like most other dynamic loading functionality, not available in statically
5863 linked applications. Implemented by Ulrich Drepper.
5865 * Low-overhead boundary checking variants of string and some stdio functions
5866 were added. These are to be used in conjunction with a gcc patch by
5867 Jakub Jelinek which adds calls to these functions if possible.
5868 Implemented by Jakub Jelinek and Ulrich Drepper.
5870 * Old code for several operating systems and machine architectures that
5871 have not been in working condition in a long time have been removed from
5872 the main source tree maintained by the GNU C Library's maintainers.
5873 These files are now reside in the separate `ports' source module
5874 that is usable as an add-on when building the library.
5878 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
5879 interrogate the dynamic linker, compatible with the Solaris interface.
5881 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
5882 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
5884 * getifaddrs now uses the netlink interface on Linux to get its information.
5885 Implemented by Thorsten Kukuk.
5887 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
5888 Implemented by Ulrich Drepper.
5890 * support for non-executable stacks on x86 has been added. Changes mostly
5893 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
5896 * getaddrinfo now performs destination address selection according to
5901 * Thread-safe interfaces for many functions that access locale data
5902 were added in version 2.3, but these features were omitted from NEWS.
5903 Many functions have variants with an `_l' suffix that take a `locale_t'
5904 object as a parameter rather than consulting the current locale.
5905 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
5906 create and maintain `locale_t' objects. Additionally, the new function
5907 `uselocale' sets "the current locale" (as used by functions not so
5908 parameterized) set for an individual thread. These features were added
5909 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
5911 * The functions getresuid, getresgid, setresuid, and setresgid, which
5912 have long been available on Linux, are now declared in <unistd.h>
5913 and are now also available on the Hurd.
5915 * ELF thread-local storage support (TLS) now works on x86-64.
5917 * The new dynamic string token $LIB is expanded in shared library names.
5918 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
5920 * Aldy Hernandez contributed complete software floating point support for
5921 PowerPC machines with no FPU.
5923 * fexecve is implemented on Linux.
5925 * The `btowc' function should work at least twice as fast due to
5926 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
5928 * With approriate thread add-ons cancelable functions are now implemented
5929 in libc.so as well. No need to call the function in libpthread. This
5930 change allowed to finally disable the incorrect and expensive handling
5931 of weak definition in ld.so.
5933 * Yet more PLT entries in libc.so have been removed. We finally arrived
5934 at the bare minimum. Startup times improved appropriately.
5936 * Support for the new Linux/x86 system call interface was added. The
5937 AT_SYSINFO auxiliary vector entry is recognized and handled.
5941 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
5944 * iconv (the program and the interface) now accepts empty names (excluding
5945 options like //TRANSLIT) to mean "use charset of current locale".
5947 * localedef can now transliterate characters in strings which are not in
5948 the provided charmap. The information from the input locale is used.
5950 * Prelinking support was added for ELF targets. This requires additional
5951 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
5953 * Read-only stdio streams now use mmap to speed up operation by eliminating
5954 copying and buffer underflows. To use add 'm' to the mode string of
5955 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
5957 * The malloc functions were completely rewritten by Wolfram Gloger based
5958 on Doug Lea's malloc-2.7.0.c.
5960 * Isamu Hasegawa contributed a completely new and POSIX-conformant
5961 implementation of regex.
5963 * Bruno Haible upgraded the iconv and locale implementation to support
5966 * Contents of the LC_* and LANG environment variables in the CEN style are
5967 not recognized anymore. It never was used. Change by Ulrich Drepper.
5969 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
5970 thread-local storage (TLS) ABI on some platforms.
5971 Changes by Ulrich Drepper. SH support by Kaz Kojima.
5973 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
5974 EUC-JISX0213, and TSCII.
5976 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
5977 BSD-compatible interface for getting all network interface addresses.
5978 Implementation for IPv4 by Roland McGrath.
5980 * Loading of locale data is faster due to the introduction of a locale
5981 archive. Implemented by Roland McGrath and Ulrich Drepper.
5983 * Startup times are significantly reduced by not using exported functions
5984 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
5987 * Steven Munroe contributed a port to PowerPC64/Linux.
5991 * The Hurd now uses the GNU libio implementation of stdio rather than the
5992 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
5994 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
5995 with the same behavior as the Linux system call of the same name.
5999 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
6000 128-bit long double format.
6002 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
6003 IBM1161, and IBM1162 charsets.
6005 * Andreas Jaeger contributed a port to x86-64/Linux.
6007 * Peter Bruin contributed a port to PowerPC/Hurd.
6009 * libc functions using I/O streams now can handle wide-oriented streams
6012 * optimizations in the dynamic linker. Binaries created by recent binutils
6013 versions start up quicker due to reduced time spent on relocations.
6015 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
6019 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
6020 asinh, atanh, j0 for the 128-bit long double format.
6022 * Bruno Haible updated all the code handling Unicode in some form to
6023 support Unicode 3.1.
6025 * Speed of regex for single-byte locales is back to previous levels.
6026 Patch by Isamu Hasegawa.
6028 * Alpha, SPARC, and IA-64 now also using floating stacks.
6030 * Startup time of internationalized applications greatly improved through
6031 iconv cache. Use iconvconfig to generate the cache file.
6032 Contributed by Ulrich Drepper.
6034 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
6035 severe performance problems. Patch by David Mosberger.
6037 * The Hurd port got a lot more functionality like AIO, various stdio
6038 extensions, etc. Mainly done by Roland McGrath.
6040 * mtrace can now lookup symbols in shared libraries.
6044 * Intel's IA-64 math library is largely integrated. It provides fast and
6045 accurate implementatations for most basic and standard math functions
6046 in float, double, and long double format.
6048 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
6049 and asin for the 96-bit long double format and asin, log, tan for the
6050 128-bit long double format.
6052 * The beginning of a last-bit accurate math library by IBM Haifa were added.
6053 The basic double functions exist today. Contributed by Abraham Ziv
6054 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
6055 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
6057 * An asynchronous name lookup library was added. The interface is designed
6058 after POSIX AIO. The proposal was circulated beforehand to get comments.
6059 No negative ones came in. Implemented by Ulrich Drepper.
6061 * Port to S390/64bit contributed by Martin Schwidefsky
6062 <schwidefsky@de.ibm.com>.
6064 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
6065 of functions for Linux/IA-64.
6067 * The RPC code is now thread safe. Threads can now use the same service
6068 of different services at the same time. Patch by Eric Norum
6069 <eric.norum@usask.ca> with some help by Ulrich Drepper.
6071 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
6072 family of functions for Linux/S390.
6074 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
6075 of functions for Linux/x86.
6077 * Port to Linux/CRIS contributed by Axis Communications.
6081 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
6082 we can now check for namespace violations and missing declarations. The
6083 result is that almost all headers are now Unix-compliant (as defined in
6084 the upcoming XPG6). The negative side is that some programs might need
6085 corrections, too, if they depend on the incorrect form of the headers in
6086 previous versions which defined too many symbols and included too many
6089 * regex now handles multibyte character sets correctly.
6090 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
6092 * iconv (the program) does now conform to the upcoming XPG6 and handles
6093 charmaps. Instead of the charset names the path of charmaps can be
6094 provided and the conversion happens based on this data.
6095 Contributed by Ulrich Drepper.
6097 * The locale program now provides detailed information about the installed
6102 only lists the names of the supported locales
6106 provides details such as country, language, and codeset name.
6107 Contributed by Ulrich Drepper.
6111 * The gencat program now parses the input file according to the charset
6112 selected by the LC_CTYPE category. This is important for stateful
6113 character sets. To make generating catalogs easier there is a way
6114 to overwrite the charset selected by the locale: before the first
6115 message or $ quote line the catalog can contain a line like
6117 $ codeset=ISO-8859-2
6119 to select the charset (ISO-8859-2 in this case).
6121 Implemented by Shinya Hanataka and Ulrich Drepper.
6123 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
6124 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
6125 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
6127 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
6128 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
6130 * The LANGUAGE environment variable is now ignored unless the locale is
6131 changed from the default "C" locale.
6133 * The usual bug fixes.
6137 * Greg McGary added runtime support for bounds checking using gcc's
6138 new -fbounded-pointers option. ix86 target is complete. PowerPC
6141 * Thorsten Kukuk added secure mode support to nscd.
6143 * The Berkeley db libraries have been removed.
6145 Related, the nss_db module is now in a separate package since it
6146 obviously requires a database library being available.
6148 * Wide character I/O streams implemented by Ulrich Drepper.
6150 * Functions from the extended socket API added by Ulrich Drepper.
6152 * Functions feenableexcept and fedisableexcept to control the
6153 behaviour of individual exceptions have been added by Andreas Jaeger.
6155 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
6157 * The resolver code has been updated from bind 8.2.3-T5B which supports
6158 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
6161 This change could in some situations effect backward compatibility. Since
6162 now `_res' is a thread-local instead of a global variable, modifying it
6163 in one thread does not have any effect in other threads.
6165 The resolver library was also extended to allow IPv6 as the transport
6166 protocol for the requests. This work was done by Stig Venaas.
6168 * Compatibility code for K&R C compilers has been removed from the
6169 header files. A ISO C compiler is needed to use the library
6170 (conforming to either C89 or C99 standard).
6172 * Complete rewrite of the localedef program to support multibyte character
6173 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
6174 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
6175 Implemented by Ulrich Drepper.
6177 Bruno Haible significantly improved the generation and use of the data
6178 structures for the wide character tables.
6180 * Plural handling in gettext implemented by Ulrich Drepper.
6182 * The utmp daemon has been removed.
6184 * The port to MIPS-Linux has been finished by Andreas Jaeger.
6186 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
6189 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
6191 * POSIX barriers implemented by Kaz Kylheku.
6193 * POSIX spawn function family implemented by Ulrich Drepper.
6195 * POSIX spinlocks are now available.
6197 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
6199 * the configure option --enable-kernel=X.Y.Z allows to strip out
6200 compatibility for kernel versions before X.Y.Z. This is currently only
6201 implemented for Linux.
6203 * the sockaddr_in6 structure changed. The IPv6 working group added a new
6204 field sin6_scope_id. This means that all programs using IPv6 should be
6205 recompiled. Don't expect binary compatibility with previous glibc
6208 * various conversion modules for IBM character sets contributed by
6211 * IA-64 port by Jes Sorensen and HJ Lu.
6225 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
6227 * New xdr functions are added; some rpc functions are now 64bit clean.
6229 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
6231 * Fixed known incompatibilities with glibc 2.0.
6233 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
6235 * Optimized a number of functions (especially the ELF dynamic loader).
6237 * Update timezone data files.
6239 * lots of charmaps corrections
6241 * some new locale definitions and charmaps
6246 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
6247 conform to POSIX member type requirements. Symbol versions have been
6248 adjusted as needed within the library, and for direct use by applications,
6249 but there is potential for problems if third-party libraries use
6250 struct timeval as part of their interface. This does not present
6251 a problem for X and other "essential" system libraries.
6253 * An additional locale model to support C++ Standard Library locale
6254 model and probably more was implemented by Ulrich Drepper.
6256 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
6259 * Miles Bader provided the `argp' function family to support hierachical
6260 command line argument parsing, layered on top of getopt.
6262 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
6264 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
6267 * scanf recognizes the %a and %A format for scanning floating point numbers.
6269 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
6270 information and interfaces for the available integer types.
6272 * about 130 new math functions were added to implement the ISO C9x math
6275 * the new header <complex.h> contains definitions of the complex math
6276 functions from ISO C 9X.
6278 * the new header <tgmath.h> defines generic macros to use complex or
6279 real valued functions.
6281 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
6283 * Andreas Jaeger provided a test suite for the math library.
6285 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
6287 * Ulrich Drepper added character set conversion functions (iconv).
6289 * Optimized string functions have been added.
6291 * The localedata addon is now part of glibc.
6293 * An implementation of profiling shared libraries was added by Ulrich Drepper.
6295 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
6296 daemon for NSS (nscd).
6298 Missing a better place here are some numbers on improvements. Under
6299 Linux 2.1.125 un-tar-ing the kernel sources takes
6303 using local files 12.19s 6.88s 22.91s
6305 using NIS 13.92s 8.91s 26.34s
6307 using NIS & nscd 10.37s 7.34s 25.30s
6309 using NIS+ 27.57s 30.37s 640.46s
6311 using NIS+ & nscd 10.25s 7.83s 26.51s
6313 using NIS & old nscd [1] 13.83s 8.32s 29.60s
6315 Keep in mind that non-namelookup related operations dominate above times.
6316 It was just a common complain that using NIS+ unpacking the kernel is
6319 [1] The old nscd implementation is not available anymore since it was
6320 distributed with glibc up to version 2.0.98 and thus is now replaced.
6322 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
6324 * Mark Kettenis provided a Hesiod NSS module.
6326 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
6327 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
6329 * rcmd can now handle netgroups (Dick Streefland).
6331 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
6334 * Support for the IPv6 protocol has been added to the socket API, as per the
6335 latest draft standards.
6337 * Support for Linux 2.2 has been added.
6339 * Interface changes relative to the latest 2.0.x release:
6340 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6341 addseverity NEW: Unix98
6342 alphasort64 NEW: LFS
6343 argp_err_exit_status NEW: argp, GNU ext
6344 argp_error NEW: argp, GNU ext
6345 argp_failure NEW: argp, GNU ext
6346 argp_help NEW: argp, GNU ext
6347 argp_parse NEW: argp, GNU ext
6348 argp_program_bug_address NEW: argp, GNU ext
6349 argp_program_version NEW: argp, GNU ext
6350 argp_program_version_hook NEW: argp, GNU ext
6351 argp_state_help NEW: argp, GNU ext
6352 argp_usage NEW: argp, GNU ext
6353 authdes_create NEW: Secure RPC
6354 authdes_getucred NEW: Secure RPC
6355 authdes_pk_create NEW: Secure RPC
6356 backtrace NEW: GNU ext.
6357 backtrace_symbols NEW: GNU ext.
6358 backtrace_symbols_fd NEW: GNU ext.
6360 cacosf NEW: ISO C 9x
6361 cacosh NEW: ISO C 9x
6362 cacoshf NEW: ISO C 9x
6363 cacoshl NEW: ISO C 9x
6364 cacosl NEW: ISO C 9x
6371 casinf NEW: ISO C 9x
6372 casinh NEW: ISO C 9x
6373 casinhf NEW: ISO C 9x
6374 casinhl NEW: ISO C 9x
6375 casinl NEW: ISO C 9x
6377 catanf NEW: ISO C 9x
6378 catanh NEW: ISO C 9x
6379 catanhf NEW: ISO C 9x
6380 catanhl NEW: ISO C 9x
6381 catanl NEW: ISO C 9x
6382 cbc_crypt NEW: Secure RPC
6386 ccoshf NEW: ISO C 9x
6387 ccoshl NEW: ISO C 9x
6393 cimagf NEW: ISO C 9x
6394 cimagl NEW: ISO C 9x
6395 clearerr_locked REMOVED
6396 clntunix_create NEW: sunrpc ext
6398 clog10 NEW: ISO C 9x
6399 clog10f NEW: ISO C 9x
6400 clog10l NEW: ISO C 9x
6410 cprojf NEW: ISO C 9x
6411 cprojl NEW: ISO C 9x
6413 crealf NEW: ISO C 9x
6414 creall NEW: ISO C 9x
6419 csinhf NEW: ISO C 9x
6420 csinhl NEW: ISO C 9x
6423 csqrtf NEW: ISO C 9x
6424 csqrtl NEW: ISO C 9x
6428 ctanhf NEW: ISO C 9x
6429 ctanhl NEW: ISO C 9x
6431 des_setparity NEW: Secure RPC
6432 ecb_crypt NEW: Secure RPC
6433 endutxent NEW: Unix98
6435 exp10f NEW: ISO C 9x
6436 exp10l NEW: ISO C 9x
6440 fattach NEW: STREAMS
6441 fdetach NEW: STREAMS
6445 feclearexcept NEW: ISO C 9x
6446 fegetenv NEW: ISO C 9x
6447 fegetexceptflag NEW: ISO C 9x
6448 fegetround NEW: ISO C 9x
6449 feholdexcept NEW: ISO C 9x
6451 feraiseexcept NEW: ISO C 9x
6452 ferror_locked REMOVED
6453 fesetenv NEW: ISO C 9x
6454 fesetexceptflag NEW: ISO C 9x
6455 fesetround NEW: ISO C 9x
6456 fetestexcept NEW: ISO C 9x
6457 feupdateenv NEW: ISO C 9x
6458 fflush_locked REMOVED
6462 fgets_unlocked NEW: GNU ext.
6463 fileno_locked REMOVED
6475 fputc_locked REMOVED
6476 fputs_unlocked NEW: GNU ext.
6477 fread_unlocked NEW: GNU ext.
6482 fstatvfs NEW: Unix98
6486 ftruncate64 NEW: LFS
6488 fwrite_unlocked NEW: GNU ext.
6489 gai_strerror NEW: IPv6
6493 getchar_locked REMOVED
6495 getdate_err NEW: Unix98
6496 getdate_r NEW: GNU ext.
6498 getnameinfo NEW: IPv6
6499 getnetname NEW: Secure RPC
6500 getpmsg NEW: STREAMS
6501 getpt NEW: Unix98 PTY
6502 getrlimit64 NEW: LFS
6503 getutxent NEW: Unix98
6504 getutxid NEW: Unix98
6505 getutxline NEW: Unix98
6506 glob64 NEW: GNU ext.
6507 globfree64 NEW: GNU ext.
6508 gnu_get_libc_release NEW: GNU ext.
6509 gnu_get_libc_version NEW: GNU ext.
6510 grantpt NEW: Unix98 PTY
6511 host2netname NEW: Secure RPC
6513 iconv_close NEW: iconv
6514 iconv_open NEW: iconv
6515 if_freenameindex NEW: IPv6
6516 if_indextoname NEW: IPv6
6517 if_nameindex NEW: IPv6
6518 if_nametoindex NEW: IPv6
6519 in6addr_any NEW: IPv6
6520 in6addr_loopback NEW: IPv6
6521 inet6_isipv4mapped NEW: IPv6
6522 isastream NEW: STREAMS
6523 iswblank NEW: GNU ext.
6524 key_decryptsession NEW: Secure RPC
6525 key_decryptsession_pk NEW: Secure RPC
6526 key_encryptsession NEW: Secure RPC
6527 key_encryptsession_pk NEW: Secure RPC
6528 key_gendes NEW: Secure RPC
6529 key_get_conv NEW: Secure RPC
6530 key_secretkey_is_set NEW: Secure RPC
6531 key_setnet NEW: Secure RPC
6532 key_setsecret NEW: Secure RPC
6533 llrint NEW: ISO C 9x
6534 llrintf NEW: ISO C 9x
6535 llrintl NEW: ISO C 9x
6536 llround NEW: ISO C 9x
6537 llroundf NEW: ISO C 9x
6538 llroundl NEW: ISO C 9x
6543 lrintf NEW: ISO C 9x
6544 lrintl NEW: ISO C 9x
6545 lround NEW: ISO C 9x
6546 lroundf NEW: ISO C 9x
6547 lroundl NEW: ISO C 9x
6549 makecontext NEW: Unix98
6550 mempcpy NEW: GNU ext.
6553 modify_ldt NEW: kernel
6557 nearbyint NEW: ISO C 9x
6558 nearbyintf NEW: ISO C 9x
6559 nearbyintl NEW: ISO C 9x
6560 netname2host NEW: Secure RPC
6561 netname2user NEW: Secure RPC
6562 nexttoward NEW: ISO C 9x
6563 nexttowardf NEW: ISO C 9x
6564 nexttowardl NEW: ISO C 9x
6568 passwd2des NEW: Secure RPC
6570 pow10f NEW: GNU ext.
6571 pow10l NEW: GNU ext.
6574 printf_size NEW: GNU ext.
6575 printf_size_info NEW: GNU ext.
6576 profil_counter REMOVED
6577 pthread_mutexattr_getkind_np REPLACED
6578 pthread_mutexattr_setkind_np REPLACED
6579 ptsname NEW: Unix98 PTY
6580 ptsname_r NEW: Unix98 PTY
6582 putchar_locked REMOVED
6583 putgrent NEW: GNU ext.
6585 putpmsg NEW: STREAMS
6586 pututxline NEW: Unix98
6590 readdir64_r NEW: LFS
6591 remquo NEW: ISO C 9x
6592 remquof NEW: ISO C 9x
6593 remquol NEW: ISO C 9x
6595 roundf NEW: ISO C 9x
6596 roundl NEW: ISO C 9x
6598 scalbln NEW: ISO C 9x
6599 scalblnf NEW: ISO C 9x
6600 scalblnl NEW: ISO C 9x
6602 sendfile NEW: kernel
6603 setcontext NEW: Unix98
6604 setrlimit64 NEW: LFS
6605 setutxent NEW: Unix98
6607 sigignore NEW: Unix98
6608 sigqueue NEW: POSIX.1b
6609 sigrelse NEW: Unix98
6610 sigset NEW: POSIX.1b
6611 sigtimedwait NEW: POSIX.1b
6612 sigwaitinfo NEW: POSIX.1b
6613 sincos NEW: GNU ext.
6614 sincosf NEW: GNU ext.
6615 sincosl NEW: GNU ext.
6619 strcasestr NEW: GNU ext.
6620 strtoimax NEW: ISO C 9x
6621 strtoumax NEW: ISO C 9x
6622 strverscmp NEW: GNU ext.
6623 svcauthdes_stats NEW: Secure RPC
6624 svcunix_create NEW: sunrpc etx
6625 svcunixfd_create NEW: sunrpc ext
6626 swapcontext NEW: Unix98
6627 tcgetsid NEW: Unix98 PTY
6628 tdestroy NEW: GNU ext.
6629 tgamma NEW: ISO C 9x
6630 tgammaf NEW: ISO C 9x
6631 tgammal NEW: ISO C 9x
6635 truncf NEW: ISO C 9x
6636 truncl NEW: ISO C 9x
6638 unlockpt NEW: Unix98 PTY
6639 updwtmpx NEW: Unix98
6640 user2netname NEW: Secure RPC
6641 utmpxname NEW: Unix98
6642 versionsort NEW: GNU ext.
6643 versionsort64 NEW: GNU ext.
6645 wcscasecmp NEW: GNU ext.
6646 wcsncasecmp NEW: GNU ext.
6647 wcsnlen NEW: GNU ext.
6648 wcstoimax NEW: ISO C 9x
6649 wcstoll NEW: ISO C 9x
6650 wcstoull NEW: ISO C 9x
6651 wcstoumax NEW: ISO C 9x
6653 wordexp NEW: POSIX.2
6654 wordfree NEW: POSIX.2
6655 write_profiling REMOVED
6656 xdecrypt NEW: Secure RPC
6657 xdr_authdes_cred NEW: Secure RPC
6658 xdr_authdes_verf NEW: Secure RPC
6659 xdr_cryptkeyarg NEW: Secure RPC
6660 xdr_cryptkeyarg2 NEW: Secure RPC
6661 xdr_cryptkeyres NEW: Secure RPC
6662 xdr_getcredres NEW: Secure RPC
6663 xdr_key_netstarg NEW: Secure RPC
6664 xdr_key_netstres NEW: Secure RPC
6665 xdr_keybuf NEW: Secure RPC
6666 xdr_keystatus NEW: Secure RPC
6667 xdr_netnamestr NEW: Secure RPC
6668 xdr_sizeof NEW: Secure RPC
6669 xdr_unixcred NEW: sunrpc ext
6670 xencrypt NEW: Secure RPC
6671 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6682 * inet_ntoa is thread-safe
6684 * updwtmp is moved from libutil to libc
6686 * rewrite of cbrt function
6688 * update of timezone data
6702 * add atoll function
6704 * fix complex problems in Berkeley DB code
6706 * fix math functions
6710 * fixed lots of header problems (especially Linux/GNU specific)
6712 * dynamic loader preserves all registers
6714 * Roland McGrath provided support for handling of auxiliary objects in
6715 the ELF dynamic loader.
6717 * support for parallel builds is improved
6721 * GNU extensions are no longer declared by default. To enable them you
6722 must define the macro `_GNU_SOURCE' in your program or compile with
6725 * The library has changed from using GNU ld symbol aliases to using weak
6726 symbols where available. The ELF object file format supports weak
6727 symbols; GNU ld also supports weak symbols in the a.out format. (There
6728 is also now support for other GNU ld extensions in ELF. Use the
6729 `--with-elf' option to configure to indicate you have ELF, and
6730 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
6731 of many files which contained only symbol aliases, reducing the size of
6732 the source and the compiled library; many other files were renamed to
6733 less cryptic names previously occupied by the symbol alias files.
6734 There is a new header file <elf.h> for programs which operate on
6735 files in the ELF format.
6737 * Converted to Autoconf version 2, so `configure' has more options.
6738 Run `configure --help' to see the details.
6740 * The library can now be configured to build profiling, highly-optimized
6741 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
6742 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
6743 `configure' enable building these extra libraries. The shared library is
6744 built by default when using both ELF and GNU ld. When shared libraries
6745 are enabled, the new library `-ldl' is available for arbitrary run-time
6746 loading of shared objects; its interface is defined in <dlfcn.h>. The
6747 new header file <link.h> gives access to the internals of the run-time
6748 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
6749 application of same name on other systems and it provides information
6750 about dynamically linked binaries.
6752 * The C library now provides the run-time support code for profiling
6753 executables compiled with `-pg'. Programs can control the profiling code
6754 through the interface in <sys/gmon.h>. The `gmon.out' files written by
6755 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
6756 the support for this file format was contributed by David Mosberger-Tang.
6758 * The math code has been replaced with a math library based on fdlibm from
6759 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
6760 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
6761 functions. The math functions now reside in a separate library, so
6762 programs using them will need to use `-lm' their linking commands.
6764 * John C. Bowman contributed optimized ix87 assembler inline functions.
6766 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
6767 mechanism similar to that found in Solaris 2. This is now used for the
6768 group, passwd, hosts, networks, services, protocols, rpc, ethers,
6769 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
6770 file controls what services are used for each individual database. This
6771 works by loading shared libraries with names specified in `nsswitch.conf',
6772 so service modules can be changed or added at any time without even
6773 relinking any program. Currently there are the file, db, and NIS based
6774 NSS services available.
6776 * The new functions `strtoq' and `strtouq' parse integer values from
6777 strings, like `strtol' and `strtoul', but they return `long long int' and
6778 `unsigned long long int' values, respectively (64-bit quantities).
6780 * The new functions `strtof' and `strtold' parse floating-point values from
6781 strings, like `strtod', but they return `float' and `long double' values,
6782 respectively (on some machines `double' and `long double' are the same).
6784 * Ulrich Drepper has contributed new implementations of the floating-point
6785 printing and reading code used in the `printf' family of functions and
6786 `strtod', `strtof', and `strtold'. These new functions are perfectly
6787 accurate, and much faster than the old ones.
6789 * The implementation of the POSIX locale model was completely rewritten by
6790 Ulrich Drepper. This includes the new programs `localedef' and `locale'
6791 to compile the POSIX locale definition.
6793 * The former dummy implementations of the strcoll and strxfrm function are
6794 now replaced by fully functional code contributed by Ulrich Drepper. The
6795 collation information comes from the POSIX locale definitions.
6797 * The new header <langinfo.h> defines an interface for accessing
6798 various locale-dependent data (using the locale chosen with `setlocale').
6800 * Ulrich Drepper has contributed a new suite of functions for operation on
6801 wide-character and multibyte-character strings, in <wchar.h>;
6802 and classification and case conversion of wide characters, in <wctype.h>.
6803 These new functions are conforming to the ISO C, Amendement 1 specification.
6805 * There is now a second implementation of the standard I/O library available.
6806 It comes from GNU libg++ as was written by Per Bothner, heavily modified
6807 by Hongjiu Lu and made thread safe by Ulrich Drepper.
6809 * You can now use positional parameter specifications in format strings
6810 for the `printf' and `scanf' families of functions. For example,
6811 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
6812 ``Number 6, Mr Jones''. This is mainly useful when providing different
6813 format strings for different languages, whose grammars may dictate
6814 different orderings of the values being printed. To support this
6815 feature, the interface for `register_printf_handler' has changed; see
6816 the header file <printf.h> for details.
6818 * The `printf' and `scanf' families of functions now understand a new
6819 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
6820 to group numbers as indicated by the locale; for `scanf' and friends, this
6821 says to accept as valid only a number with all the proper grouping
6822 separators in the right places. In the default "C" locale, numbers are
6823 not grouped; but locales for specific countries will define the usual
6824 conventions (i.e. separate thousands with `,' in the US locale).
6826 * The pgrp functions have been regularized, slightly incompatibly but much
6827 less confusingly. The core functions are now `getpgid' and `setpgid',
6828 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
6829 argument) and BSD `setpgrp' (identical to `setpgid') functions are
6830 provided for compatibility. There is no longer an incompatible `getpgrp'
6831 with an argument declared under _BSD_SOURCE; no BSD code uses it.
6833 * The new header file <fts.h> and suite of functions simplify programs that
6834 operate on directory trees. This code comes from 4.4 BSD.
6836 * The resolver code has been updated from the BIND 4.9.5-P1 release.
6837 Parts of the code were heavily modified by Ulrich Drepper to fit in the
6838 NSS scheme used in glibc.
6840 * There is a new malloc debugging hook `__memalign_hook'.
6842 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
6843 `unsigned int' in <sys/types.h>. These are for compatibility only and
6844 their use is discouraged.
6846 * The `-lmcheck' library to enable standard malloc debugging hooks is now
6847 done differently, so that it works even without GNU ld.
6849 * New function `euidaccess' checks allowed access to a file like `access',
6850 but using the effective IDs instead of the real IDs.
6852 * The time zone data files have been updated for the latest and greatest
6853 local time conventions of the countries of the world.
6855 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
6858 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
6859 for formatting floating-point numbers. They are provided only for
6860 compatibility; new programs should use `sprintf' instead. There are
6861 also equivalent function for the `long double' floating-point type and
6862 all functions also exist in a reentrant form.
6864 * The new auxiliary library `-lutil' from 4.4 BSD contains various
6865 functions for maintaining the login-record files (primarily of use to
6866 system programs such as `login'), and convenient functions for
6867 allocating and initializing a pseudo-terminal (pty) device.
6869 * Ulrich Drepper has contributed new support for System V style
6870 shared memory and IPC on systems that support it.
6872 * Ulrich Drepper has contributed several miscellaneous new functions found
6873 in System V: The `hsearch' family of functions provide an effective
6874 implementation of hash tables; `a64l' and `l64a' provide a very simple
6875 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
6878 * Ulrich Drepper has contributed new reentrant counterparts for the
6879 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
6881 * Ulrich Drepper has contributed new, highly-optimized versions of several
6882 string functions for the i486/Pentium family of processors.
6884 * Ulrich Drepper has updated the Linux-specific code, based largely
6885 on work done in Hongjiu Lu's version of GNU libc for Linux.
6886 The GNU library now supports Linux versions 2.0.10 and later,
6887 using the ELF object file format (i[3456]86-*-linux).
6889 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
6891 * David Mosberger-Tang and Richard Henderson have ported the C library
6892 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
6893 dynamic linking support for ELF/Alpha.
6895 * Richard Henderson contributed several Alpha optimized assembler function
6896 for arithmetic and string handling.
6898 * Ulrich Drepper has contributed a new set of message catalog functions to
6899 support multiple languages using the <libintl.h> interface, for use with
6900 his new package GNU gettext. Translation volunteers have contributed
6901 catalogs of the library's messages in Spanish, German, and Korean.
6903 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
6904 program and the `catgets' function for reading the catalog files it
6905 creates. (The <libintl.h> interface is preferred; we include the
6906 <nl_types.h> interface using `catgets' only for source compatibility with
6907 programs already written to use it.)
6909 * New header file <values.h> gives SVID-compatible names for <limits.h>
6912 * Various new macros, declarations, and small header files for compatibility
6915 * New function `group_member' is a convenient way to check if a process has
6916 a given effective group ID.
6918 * When using GCC 2.7 and later, the socket functions are now declared in a
6919 special way so that passing an argument of type `struct sockaddr_in *',
6920 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
6921 `struct sockaddr *' type, does not generate a type-clash warning.
6923 * New function `error' declared in header file <error.h> is a convenient
6924 function for printing error messages and optionally exiting; this is the
6925 canonical function used in GNU programs. The new functions `err', `warn',
6926 and friends in header file <err.h> are the canonical 4.4 BSD interface for
6927 doing the same thing.
6929 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
6930 POSIX.2 `glob' function to do ~ and {...} expansion.
6932 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
6933 `clearenv' which is used in POSIX.9 is also available.
6935 * New function `getsid' returns session ID number on systems that support it.
6937 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
6938 files <db.h> and <mpool.h> provide a rich set of functions for several
6939 types of simple databases stored in memory and in files, and <ndbm.h> is
6940 an old `ndbm'-compatible interface using the `db' functions. Link with
6941 `-ldb' to get these functions.
6943 * New macro `strdupa' copies a string like `strdup', but uses local stack
6944 space from `alloca' instead of dynamic heap space from `malloc'.
6946 * New function `strnlen' is like `strlen' but searches only a given maximum
6947 number of characters for the null terminator. `stpncpy', `strndup' and
6948 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
6951 * New function `statfs' in header <sys/statfs.h>.
6953 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
6954 provide convenient functions for operating on blocks of null-terminated
6957 * A new suite of functions in <utmp.h> handle all the details of reading
6958 and writing the utmp file.
6960 * An implementation of the NIS/YP(tm) based NSS service was contributed by
6963 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
6964 completely POSIX compliant and also implemented the extended functionality
6965 to handle alternate digit representation and alternate era date formats.
6967 * Ulrich Drepper provided an implementation of the `strptime' function
6968 defined in XPG4.2 which transforms a string into a `struct tm' value.
6970 * Paul Eggert provided the tzselect shell script as part of the timezone
6971 code. The shell script makes it easy to select the correct timezone
6974 * The implementation of the malloc family of functions is completely replaced
6975 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
6976 The implementation uses the mmap function (if available) and it is
6977 optimized for the use in multi threaded programs.
6979 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
6980 functions. This new functionality is usable by specifying a special
6981 salt string and it is compatible with implementation on *BSD systems.
6983 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
6984 `getsubopt' to handle second level command line options, `bsd_signal'
6985 to access BSD style `signal' functionality, the obsolete `regexp' style
6988 * the `lchown' function is available on system which support this
6991 * The implementation of the shadow password handling function was contributed
6994 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
6996 * POSIX.1g support was added. The <sys/select.h> header is available,
6997 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
6998 implementation of `getaddrinfo'.
7002 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
7004 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
7005 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
7007 * The new function `daemon' from 4.4 BSD is useful for server programs that
7008 want to put themselves in the background.
7010 * Joel Sherrill has contributed support for several standalone boards that
7011 run without an operating system.
7013 * `printf', `scanf' and friends now accept a `q' type modifier for long
7014 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
7016 * All of the code taken from BSD (notably most of the math and networking
7017 routines) has been updated from the BSD 4.4-Lite release.
7019 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
7021 * The new functions `getdomainname' and `setdomainname' fetch or change the
7022 YP/NIS domain name. These are system calls which exist on systems which
7025 * The time zone data files have been updated for the latest international
7028 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
7029 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
7033 * The C library now includes support for Sun RPC, from Sun's free
7034 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
7035 are included. (There is still no support for YP.)
7037 * Tom Quinn has contributed a port of the C library to SGI machines running
7038 Irix 4 (mips-sgi-irix4).
7040 * The new `lockf' function is a simplified interface to the locking
7041 facilities of `fcntl', included for compatibility.
7043 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
7045 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
7047 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
7050 * The error message printed by `assert' for a failed assertion now includes
7051 the name of the program (if using GNU ld) and the name of the calling
7052 function (with versions of GCC that support this).
7054 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
7056 * The library now includes the <sys/mman.h> header file and memory
7057 management functions `mmap', `munmap', `mprotect', `msync', and
7058 `madvise', on systems that support those facilities.
7060 * The interface for `mcheck' has changed slightly: the function called to
7061 abort the program when an allocation inconsistency is detected now takes
7062 an argument that indicates the type of failure. The new function
7063 `mprobe' lets you request a consistency check for a particular block at
7064 any time (checks are normally done only when you call `free' or `realloc'
7067 * It is now possible to easily cross-compile the C library, building on one
7068 system a library to run on another machine and/or operating system. All
7069 you need to do is set the variable `HOST_CC' in `configparms' to the
7070 native compiler for programs to run on the machine you are building on (a
7071 few generator programs are used on Unix systems); set `CC' to the
7074 * The new function `fexecve' (only implemented on the GNU system) executes
7075 a program file given a file descriptor already open on the file.
7079 * Brendan Kehoe has contributed most of a port to the DEC Alpha
7080 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
7082 * You can set the variable `libprefix' in `configparms' to specify a prefix
7083 to be prepended to installed library files; this makes it easy to install
7084 the GNU C library to be linked as `-lgnuc' or whatever.
7086 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
7087 copies a limited number of characters from a string, and returns the
7088 address of the last character written.
7090 * You no longer need to check for whether the installed `stddef.h' is
7091 compatible with the GNU C library. configure now checks for you.
7093 * You can now define a per-stream `fileno' function to convert the
7094 stream's cookie into an integral file descriptor.
7096 * ``malloc (0)'' no longer returns a null pointer. Instead, it
7097 allocates zero bytes of storage, and returns a unique pointer which
7098 you can pass to `realloc' or `free'. The behavior is undefined if
7099 you dereference this pointer.
7101 * The C library now runs on Sony NEWS m68k machines running either
7102 NewsOS 3 or NewsOS 4.
7104 * The new `syscall' function is a system-dependent primitive function
7105 for invoking system calls. It has the canonical behavior on Unix
7106 systems, including unreliable return values for some calls (such as
7107 `pipe', `fork' and `getppid').
7109 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
7110 to `EAGAIN', which is the preferred name. On systems whose kernels
7111 use two distinct codes, the C library now translates EWOULDBLOCK to
7112 EAGAIN in every system call function.
7116 * The GNU C Library Reference Manual is now distributed with the library.
7117 `make dvi' will produce a DVI file of the printed manual.
7118 `make info' will produce Info files that you can read on line using C-h i
7119 in Emacs or the `info' program.
7120 Please send comments on the manual to bug-glibc-manual@gnu.org.
7122 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
7124 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
7126 * Jason Merrill has contributed a port to the Sequent Symmetry running
7127 Dynix version 3 (i386-sequent-dynix).
7129 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
7130 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
7132 * New function `memory_warnings' lets you arrange to get warnings when
7133 malloc is running out of memory to allocate, like Emacs gives you.
7135 * The C library now contains the relocating allocator used in Emacs 19 for
7136 its editing buffers. This allocator (ralloc) minimizes allocation
7137 overhead and fragmentation by moving allocated regions around whenever it
7138 needs to. You always refer to a ralloc'd region with a "handle" (a
7139 pointer to a pointer--an object of type `void **').
7141 * There is a new `printf' format: `%m' gives you the string corresponding
7142 to the error code in `errno'.
7144 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
7145 or `%[' conversion, but instead of filling in a fixed-sized buffer you
7146 pass, the `a' modifier says to fill in a `char **' you pass with a
7149 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
7150 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
7151 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
7153 * `mkstemp' is a traditional Unix function to atomically create and open a
7154 uniquely-named temporary file.
7158 * The standard location for the file that says what the local timezone is
7159 has changed again. It is now `/usr/local/etc/localtime' (or more
7160 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
7162 * The distribution no longer contains any files with names longer than 14
7165 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
7166 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
7168 * New functions `ttyslot' and `syslog' from 4.4 BSD.
7172 * The configuration process has changed quite a bit. The `configure'
7173 script is now used just like the configuration scripts for other GNU
7174 packages. The `sysdeps' directory hierarchy is much rearranged.
7175 The file `INSTALL' explains the new scheme in detail.
7177 * The header files no longer need to be processed into ANSI C and
7178 traditional C versions. There is just one set of files to install, and
7179 it will work with ANSI or old C compilers (including `gcc -traditional').
7181 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
7182 MIPS DECStation running Ultrix 4.
7184 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
7185 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
7186 made itself into a shared library.
7188 * Yet further improved support for the i386, running 4.3 BSD-like systems
7189 (such as Mach 3 with the Unix single-server), or System V.
7191 * New function `strncasecmp' to do case-insensitive string comparison
7192 with limited length.
7194 * New function `strsep' is a reentrant alternative to `strtok'.
7196 * New functions `scandir' and `alphasort' for searching directories.
7198 * New function `setenv' is a better interface to `putenv'.
7200 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
7201 function for traversing a directory tree.
7203 * The GNU obstack package is now also part of the C library.
7204 The new function `open_obstack_stream' creates a stdio stream that
7205 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
7206 formatted output directly to an obstack.
7208 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
7209 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
7211 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
7213 * The new functions `strfry' and `memfrob' do mysterious and wonderful
7214 things to your strings.
7216 * There are some new test programs: test-fseek, testmb, and testrand.
7218 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
7219 These ports are not finished, but are a good starting place for really
7220 supporting those systems.
7222 * `/etc/localtime' is now the standard location for the file that says what
7223 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
7224 This follows the general principle that `/etc' is the place for all local
7225 configuration files.
7227 * The C library header files now use `extern "C"' when used by the C++
7228 compiler, so the C library should now work with C++ code.
7230 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
7231 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
7234 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
7235 function which uses the `merge sort' algorithm, and is said to be
7236 significantly faster than the old GNU `qsort' function. Merge sort is
7237 now the standard `qsort' function. The new algorithm can require a lot
7238 of temporary storage; so, the old sorting function is called when the
7239 required storage is not available.
7241 * The C library now includes Michael Glad's Ultra Fast Crypt, which
7242 provides the Unix `crypt' function, plus some other entry points.
7244 * The code and header files taken from 4.4 BSD have been updated with the
7245 latest files released from Berkeley.
7247 ----------------------------------------------------------------------
7250 Permission is granted to anyone to make or distribute verbatim copies
7251 of this document as received, in any medium, provided that the
7252 copyright notice and this permission notice are preserved,
7253 thus giving the recipient permission to redistribute in turn.
7255 Permission is granted to distribute modified versions
7256 of this document, or of portions of it,
7257 under the above conditions, provided also that they
7258 carry prominent notices stating who last changed them.
7261 version-control: never