1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2020 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 * Unicode 12.1.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.1.0, using
14 generator scripts contributed by Mike FABIAN (Red Hat).
16 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
18 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
19 DT_DEPAUDIT dynamic section entries of the main executable.
21 * powerpc64le supports IEEE128 long double libm/libc redirects when
22 using the -mabi=ieeelongdouble to compile C code on supported GCC
23 toolchains. It is recommended to use GCC 8 or newer when testing
26 * To help detect buffer overflows and other out-of-bounds accesses
27 several APIs have been annotated with GCC 'access' attribute. This
28 should help GCC 10 issue better warnings.
30 Deprecated and removed features, and other changes affecting compatibility:
32 * The deprecated <sys/sysctl.h> header and the sysctl function have been
33 removed. To support old binaries, the sysctl function continues to
34 exist as a compatibility symbol (on those architectures which had it),
35 but always fails with ENOSYS. This reflects the removal of the system
36 call from all architectures, starting with Linux 5.5.
38 * The sstk function is no longer available to newly linked binaries.
39 Its implementation always returned with a failure, and the function
40 was not declared in any header file.
42 * ldconfig now defaults to the new format for ld.so.cache. glibc has
43 already supported this format for almost 20 years.
45 Changes to build and runtime requirements:
47 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
48 long double redirects.
50 Security related changes:
52 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
53 corruption when they were passed a pseudo-zero argument. Reported by Guido
54 Vranken / ForAllSecure Mayhem.
56 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
57 out-of-bounds write when executed in a signal frame context.
59 CVE-2020-1752: A use-after-free vulnerability in the glob function when
60 expanding ~user has been fixed.
62 The following bugs are resolved with this release:
64 [The release manager will add the list generated by
65 scripts/list-fixed-bugs.py just before the release.]
71 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
72 enable features from the draft ISO C2X standard. Only some features from
73 this draft standard are supported by the GNU C Library, and as the draft
74 is under active development, the set of features enabled by this macro is
75 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
76 by compiling with "gcc -std=gnu2x".
78 * The <math.h> functions that round their results to a narrower type now
79 have corresponding type-generic macros in <tgmath.h>, as defined in TS
80 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
81 Clarification Request 13 to TS 18661-3.
83 * The function pthread_clockjoin_np has been added, enabling join with a
84 terminated thread with a specific clock. It allows waiting against
85 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
87 * New locale added: mnw_MM (Mon language spoken in Myanmar).
89 * The DNS stub resolver will optionally send the AD (authenticated data) bit
90 in queries if the trust-ad option is set via the options directive in
91 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
92 mode, the AD bit, as provided by the name server, is available to
93 applications which call res_search and related functions. In the default
94 mode, the AD bit is not set in queries, and it is automatically cleared in
95 responses, indicating a lack of DNSSEC validation. (Therefore, the name
96 servers and the network path to them are treated as untrusted.)
98 Deprecated and removed features, and other changes affecting compatibility:
100 * The totalorder and totalordermag functions, and the corresponding
101 functions for other floating-point types, now take pointer arguments to
102 avoid signaling NaNs possibly being converted to quiet NaNs in argument
103 passing. This is in accordance with the resolution of Clarification
104 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
105 floating-point arguments directly will continue to work.
107 * The obsolete function stime is no longer available to newly linked
108 binaries, and its declaration has been removed from <time.h>.
109 Programs that set the system time should use clock_settime instead.
111 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
112 in a future version of glibc. In this release, the header still exists
113 but calling ftime will cause a compiler warning. All programs should use
114 gettimeofday or clock_gettime instead.
116 * The gettimeofday function no longer reports information about a
117 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
118 many years, as it cannot handle the full complexity of the world's
119 timezones, but hitherto we have supported it on a best-effort basis.
120 Changes required to support 64-bit time_t on 32-bit architectures have
121 made this no longer practical.
123 As of this release, callers of gettimeofday with a non-null 'tzp' argument
124 should expect to receive a 'struct timezone' whose tz_minuteswest and
125 tz_dsttime fields are zero. (For efficiency reasons, this does not always
126 happen on a few Linux-based ports. This will be corrected in a future
129 All callers should supply a null pointer for the 'tzp' argument to
130 gettimeofday. For accurate information about the time zone associated
131 with the current time, use the localtime function.
133 gettimeofday itself is obsolescent according to POSIX. We have no plans
134 to remove access to this function, but portable programs should consider
135 using clock_gettime instead.
137 * The settimeofday function can still be used to set a system-wide time
138 zone when the operating system supports it. This is because the Linux
139 kernel reused the API, on some architectures, to describe a system-wide
140 time-zone-like offset between the software clock maintained by the kernel,
141 and the "RTC" clock that keeps time when the system is shut down.
143 However, to reduce the odds of this offset being set by accident,
144 settimeofday can no longer be used to set the time and the offset
145 simultaneously. If both of its two arguments are non-null, the call
146 will fail (setting errno to EINVAL).
148 Callers attempting to set this offset should also be prepared for the call
149 to fail and set errno to ENOSYS; this already happens on the Hurd and on
150 some Linux architectures. The Linux kernel maintainers are discussing a
151 more principled replacement for the reused API. After a replacement
152 becomes available, we will change settimeofday to fail with ENOSYS on all
153 platforms when its 'tzp' argument is not a null pointer.
155 settimeofday itself is obsolescent according to POSIX. Programs that set
156 the system time should use clock_settime and/or the adjtime family of
157 functions instead. We may cease to make settimeofday available to newly
158 linked binaries after there is a replacement for Linux's time-zone-like
161 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
162 the optional CAS instruction is implemented (for instance, LEON processors
163 are still supported, but SuperSPARC processors are not).
165 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
168 * If a lazy binding failure happens during dlopen, during the execution of
169 an ELF constructor, the process is now terminated. Previously, the
170 dynamic loader would return NULL from dlopen, with the lazy binding error
171 captured in a dlerror message. In general, this is unsafe because
172 resetting the stack in an arbitrary function call is not possible.
174 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
175 executable stack unless explicitly configured at build time to require
176 minimum kernel version 4.8 or newer. This is because executing
177 floating-point branches on a non-executable stack on Linux kernels prior to
178 4.8 can lead to application crashes for some MIPS configurations. While
179 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
180 expected to enable non-executable stack by default with PT_GNU_STACK by
181 default and is thus likely to trigger a crash on older kernels.
183 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
184 non-executable stack while dropping support for older kernels.
186 * System call wrappers for time system calls now use the new time64 system
187 calls when available. On 32-bit targets, these wrappers attempt to call
188 the new system calls first and fall back to the older 32-bit time system
189 calls if they are not present. This may cause issues in environments
190 that cannot handle unsupported system calls gracefully by returning
191 -ENOSYS. Seccomp sandboxes are affected by this issue.
193 Changes to build and runtime requirements:
195 * It is no longer necessary to have recent Linux kernel headers to build
196 working (non-stub) system call wrappers on all architectures except 64-bit
197 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
199 * The ChangeLog file is no longer present in the toplevel directory of the
200 source tree. ChangeLog files are located in the ChangeLog.old directory as
201 ChangeLog.N where the highest N has the latest entries.
203 Security related changes:
205 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
206 environment variable during program execution after a security
207 transition, allowing local attackers to restrict the possible mapping
208 addresses for loaded libraries and thus bypass ASLR for a setuid
209 program. Reported by Marcin KoĆcielnicki.
211 The following bugs are resolved with this release:
213 [12031] localedata: iconv -t ascii//translit with Greek characters
214 [15813] libc: Multiple issues in __gen_tempname
215 [17726] libc: [arm, sparc] profil_counter should be compat symbol
216 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
217 [19767] libc: vdso is not used with static linking
218 [19903] hurd: Shared mappings not being inherited by children processes
219 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
220 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
222 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
223 Symbols-A/B Unicode blocks
224 [23518] libc: Eliminate __libc_utmp_jump_table
225 [24026] malloc: malloc_info() returns wrong numbers
226 [24054] localedata: Many locales are missing date_fmt
227 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
228 [24304] dynamic-link: Lazy binding failure during ELF
229 constructors/destructors is not fatal
230 [24376] libc: RISC-V symbol size confusion with _start
231 [24682] localedata: zh_CN first weekday should be Monday per GB/T
233 [24824] libc: test-in-container does not install charmap files compatible
235 [24844] regex: regex bad pointer / leakage if malloc fails
236 [24867] malloc: Unintended malloc_info formatting changes
237 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
238 [24880] libc: login: utmp implementation uses struct flock with fcntl64
239 [24882] libc: login: pututline uses potentially outdated cache
240 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
241 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
243 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
245 [24930] dynamic-link: dlopen of PIE executable can result in
246 _dl_allocate_tls_init assertion failure
247 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
248 (stringop-overflow error)
249 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
250 functions other can lead to crashes
251 [24967] libc: jemalloc static linking causes runtime failure
252 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
254 [25035] libc: sbrk() failure handled poorly in tunables_strdup
255 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
256 [25097] libc: new -Warray-bounds with GCC 10
257 [25112] dynamic-link: dlopen must not make new objects accessible when it
258 still can fail with an error
259 [25139] localedata: Please add the new mnw_MM locale
260 [25149] regex: Array bounds violation in proceed_next_node
261 [25157] dynamic-link: Audit cookie for the dynamic loader is not
262 initialized correctly
263 [25189] libc: glibc's __glibc_has_include causes issues with clang
265 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
267 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
268 binaries (CVE-2019-19126)
269 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
271 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
273 [25232] string: <string.h> does not enable const correctness for strchr et
275 [25233] localedata: Consider "." as the thousands separator for sl_SI
277 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
278 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
279 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
281 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
282 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
284 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
285 (dl_initfirst) link map pointer
286 [25401] malloc: pvalloc must not have __attribute_alloc_size__
287 [25423] libc: Array overflow in backtrace on powerpc
288 [25425] network: Missing call to __resolv_context_put in
289 getaddrinfo.c:gethosts
296 * Unicode 12.1.0 Support: Character encoding, character type info, and
297 transliteration tables are all updated to Unicode 12.1.0, using
298 generator scripts contributed by Mike FABIAN (Red Hat).
300 * The dynamic linker accepts the --preload argument to preload shared
301 objects, in addition to the LD_PRELOAD environment variable.
303 * The twalk_r function has been added. It is similar to the existing
304 twalk function, but it passes an additional caller-supplied argument
305 to the callback function.
307 * On Linux, the getdents64, gettid, and tgkill functions have been added.
309 * Minguo (Republic of China) calendar support has been added as an
310 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
313 * The entry for the new Japanese era has been added for ja_JP locale.
315 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
316 pvalloc, memalign, and posix_memalign fail now with total object size
317 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
318 pointer subtraction within the allocated object, where results might
319 overflow the ptrdiff_t type.
321 * The dynamic linker no longer refuses to load objects which reference
322 versioned symbols whose implementation has moved to a different soname
323 since the object has been linked. The old error message, symbol
324 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
325 link time reference, is gone.
327 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
328 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
329 functions. These behave similarly to their "timed" equivalents, but also
330 accept a clockid_t parameter to determine which clock their timeout should
331 be measured against. All functions allow waiting against CLOCK_MONOTONIC
332 and CLOCK_REALTIME. The decision of which clock to be used is made at the
333 time of the wait (unlike with pthread_condattr_setclock, which requires
334 the clock choice at initialization time).
336 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
337 work, new resolvers can use a second argument which can be extended in
338 the future, currently it contains the AT_HWCAP2 value.
340 Deprecated and removed features, and other changes affecting compatibility:
342 * The copy_file_range function fails with ENOSYS if the kernel does not
343 support the system call of the same name. Previously, user space
344 emulation was performed, but its behavior did not match the kernel
345 behavior, which was deemed too confusing. Applications which use the
346 copy_file_range function can no longer rely on glibc to provide a fallback
347 on kernels that do not support the copy_file_range system call, and if
348 this function returns ENOSYS, they will need to use their own fallback.
349 Support for copy_file_range for most architectures was added in version
350 4.5 of the mainline Linux kernel.
352 * The functions clock_gettime, clock_getres, clock_settime,
353 clock_getcpuclockid, clock_nanosleep were removed from the librt library
354 for new applications (on architectures which had them). Instead, the
355 definitions in libc will be used automatically, which have been available
358 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
359 and <sys/stropts.h> have been removed.
361 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
362 resolver flag (deprecated in glibc 2.25) have been removed.
364 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
365 resolver have been removed from <resolv.h>.
367 * With --enable-bind-now, installed programs are now linked with the
370 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
371 configurations) has been removed, following the deprecation of this
372 subarchitecture in version 8 of GCC, and its removal in version 9.
374 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
375 header have been removed.
377 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
378 deprecated and will be removed from a future version of glibc.
379 Application should directly access /proc instead. For obtaining random
380 bits, the getentropy function can be used.
382 Changes to build and runtime requirements:
384 * GCC 6.2 or later is required to build the GNU C Library.
386 Older GCC versions and non-GNU compilers are still supported when
387 compiling programs that use the GNU C Library.
389 Security related changes:
391 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
392 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
393 has undefined behavior. On x32, the size_t argument may be passed
394 in the lower 32 bits of the 64-bit RDX register with non-zero upper
395 32 bits. When it happened with the sign bit of RDX register set,
396 memcmp gave the wrong result since it treated the size argument as
397 zero. Reported by H.J. Lu.
399 CVE-2019-9169: Attempted case-insensitive regular-expression match
400 via proceed_next_node in posix/regexec.c leads to heap-based buffer
401 over-read. Reported by Hongxu Chen.
403 The following bugs are resolved with this release:
405 [2872] locale: Transliteration Cyrillic -> ASCII fails
406 [6399] libc: gettid() should have a wrapper
407 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
408 [16976] glob: fnmatch unbounded stack VLA for collating symbols
409 [17396] localedata: globbing for locale by [[.collating-element.]]
410 [18035] dynamic-link: pldd does no longer work, enters infinite loop
411 [18465] malloc: memusagestat is built using system C library
412 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
413 invalid input drops valid char
414 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
415 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
416 [21897] localedata: Afar locales: Fix mon, abmon, and abday
417 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
418 [23352] malloc: __malloc_check_init still defined in public header
420 [23403] nptl: Wrong alignment of TLS variables
421 [23501] libc: nftw() doesn't return dangling symlink's inode
422 [23733] malloc: Check the count before calling tcache_get()
423 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
425 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
426 [23844] nptl: pthread_rwlock_trywrlock results in hang
427 [23983] argparse: Missing compat versions of argp_failure and argp_error
428 for long double = double
429 [23984] libc: Missing compat versions of err.h and error.h functions for
431 [23996] localedata: Dutch salutations
432 [24040] libc: riscv64: unterminated call chain in __thread_start
433 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
435 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
436 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
438 [24114] regex: regexec buffer read overrun in "grep -i
439 '\(\(\)*.\)*\(\)\(\)\1'"
440 [24122] libc: Segfaults if 0 returned from la_version
441 [24153] stdio: Some input functions do not react to stdin assignment
442 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
443 RDX is set) (CVE-2019-7309)
444 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
445 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
446 not the default "nor"
447 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
448 false positives, change to modern flexible array
449 [24180] nptl: pthread_mutex_trylock does not use the correct order of
450 instructions while maintaining the robust mutex list due to missing
452 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
453 unnecessary librt dependencies
454 [24200] localedata: Revert first_weekday removal in en_IE locale
455 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
456 [24215] nptl: pthread_timedjoin_np should be a cancellation point
457 [24216] malloc: Check for large bin list corruption when inserting
459 [24228] stdio: old x86 applications that use legacy libio crash on exit
460 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
462 [24293] localedata: Missing Minguo calendar support for TW locales
463 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
465 [24307] localedata: Update locale data to Unicode 12.0.0
466 [24323] dynamic-link: dlopen should not be able open PIE objects
467 [24335] build: "Obsolete types detected" with Linux 5.0 headers
468 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
470 [24370] localedata: Add lang_name for tt_RU locale
471 [24372] locale: Binary locale files are not architecture independent
472 [24394] time: strptime %Ey mis-parses final year of era
473 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
475 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
477 [24531] malloc: Malloc tunables give tcache assertion failures
478 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
480 [24535] localedata: Update locale data to Unicode 12.1.0
481 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
482 kernels and break testing
483 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
484 [24556] build: [GCC 9] error: â%sâ directive argument is null
485 [-Werror=format-overflow=]
486 [24570] libc: alpha: compat msgctl uses __IPC_64
487 [24584] locale: Data race in __wcsmbs_clone_conv
488 [24588] stdio: Remove codecvt vtables from libio
489 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
491 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
492 [24632] stdio: Old binaries which use freopen with default stdio handles
494 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
496 [24652] localedata: szl_PL spelling correction
497 [24695] nss: nss_db: calling getpwent after endpwent crashes
498 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
499 in /etc/nsswitch.conf
500 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
501 [24740] libc: getdents64 type confusion
502 [24741] dynamic-link: ld.so should not require that a versioned symbol is
503 always implemented in the same library
504 [24744] libc: Remove copy_file_range emulation
505 [24757] malloc: memusagestat is linked against system libpthread
506 [24794] libc: Partial test suite run builds corrupt test-in-container
514 * The getcpu wrapper function has been added, which returns the currently
515 used CPU and NUMA node. This function is Linux-specific.
517 * A new convenience target has been added for distribution maintainers
518 to build and install all locales as directories with files. The new
519 target is run by issuing the following command in your build tree:
520 'make localedata/install-locale-files', with an optional DESTDIR
521 to set the install root if you wish to install into a non-default
524 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
526 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
527 for _GNU_SOURCE, to match BSD environments.
529 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
530 indicates that it will abort the transaction prior to entering the kernel
531 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
532 suspended, and this caused some undefined side-effects issues by aborting
533 transactions manually. Glibc avoided it by abort transactions manually on
534 each syscall, but it lead to performance issues on newer kernels where the
535 HTM state is saved and restore lazily (the state being saved even when the
536 process actually does not use HTM).
538 * The functions posix_spawn_file_actions_addchdir_np and
539 posix_spawn_file_actions_addfchdir_np have been added, enabling
540 posix_spawn and posix_spawnp to run the new process in a different
541 directory. These functions are GNU extensions. The function
542 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
545 * The popen and system do not run atfork handlers anymore (BZ#17490).
546 Although it is a possible POSIX violation, the POSIX rationale in
547 pthread_atfork documentation regarding atfork handlers is to handle
548 inconsistent mutex state after a fork call in a multi-threaded process.
549 In both popen and system there is no direct access to user-defined mutexes.
551 * Support for the C-SKY ABIV2 running on Linux has been added. This port
552 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
554 - C-SKY ABIV2 soft-float little-endian
555 - C-SKY ABIV2 hard-float little-endian
557 * strftime's default formatting of a locale's alternative year (%Ey)
558 has been changed to zero-pad the year to a minimum of two digits,
559 like "%y". This improves the display of Japanese era years during
560 the first nine years of a new era, and is expected to be harmless
561 for all other locales (only Japanese locales regularly have
562 alternative year numbers less than 10). Zero-padding can be
563 overridden with the '_' or '-' flags (which are GNU extensions).
565 * As a GNU extension, the '_' and '-' flags can now be applied to
566 "%EY" to control how the year number is formatted; they have the
567 same effect that they would on "%Ey".
569 Deprecated and removed features, and other changes affecting compatibility:
571 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
572 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
574 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
575 in <sys/procfs.h>, has been corrected to match the type actually used by
576 the Linux kernel. This affects the size and layout of that structure on
577 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
579 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
580 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
581 defined in <sys/procfs.h>, has been corrected to match the type actually
582 used by the Linux kernel. This affects the size and layout of those
585 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
586 meant to scan a string and allocate space for it with malloc, is now
587 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
588 defined. This extension conflicts with C99's use of '%a' to scan a
589 hexadecimal floating-point number, which is now available to programs
590 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
592 POSIX.1-2008 includes the feature of allocating a buffer for string input
593 with malloc, using the modifier letter 'm' instead. Programs using
594 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
595 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
596 C99 '%a' no longer need to avoid _GNU_SOURCE.
598 GCC's -Wformat warnings can detect most uses of this extension, as long
599 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
600 __attribute__ ((format (scanf, ...))).
602 Changes to build and runtime requirements:
604 * Python 3.4 or later is required to build the GNU C Library.
606 * On most architectures, GCC 5 or later is required to build the GNU C
607 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
609 Older GCC versions and non-GNU compilers are still supported when
610 compiling programs that use the GNU C Library.
612 Security related changes:
614 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
615 denial of service due to resource exhaustion when processing getaddrinfo
616 calls with crafted host names. Reported by Guido Vranken.
618 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
619 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
620 happened, accessing the 32-bit size_t value as the full 64-bit register
621 in the assembly string/memory functions would cause a buffer overflow.
624 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
625 addresses with arbitrary trailing characters, potentially leading to data
626 or command injection issues in applications.
628 The following bugs are resolved with this release:
630 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
631 [10496] localedata: 12h time representation in multiple locales faulty
632 [10797] localedata: it_IT locale numeric does not have a separator for
634 [11319] libc: dprintf doesn't handle errors properly
635 [16346] time: mktime: potentially unsafe use of localtime_offset
636 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
638 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
639 posix_spawn_file_actions_addfchdir_np
640 [17426] localedata: Indian locales: set the correct date format
641 [17490] stdio: popen should not invoke atfork handlers
642 [17783] libc: TIOCSER_TEMT conditions inconsistent
643 [18040] regex: use-after-free in regexec/get_subexp
644 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
645 [20018] network: getaddrinfo should reject IP addresses with trailing
646 characters (CVE-2016-10739)
647 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
648 [20271] libc: Missing "\n" in __libc_fatal calls
649 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
650 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
651 pointer argument is non-NULL
652 [21037] stdio: open_memstream and freopen
653 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
654 [21716] time: Crash in glibc's mktime in low-memory situations
655 [22834] stdio: Subprocess forked by popen may crash in Linux when
656 multithreads call popen
657 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
658 and pthread_create fails.
659 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
660 [23125] libc: riscv64: endless loop when throwing an exception from a
662 [23275] nptl: Race in pthread_mutex_lock while promoting to
663 PTHREAD_MUTEX_ELISION_NP.
664 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
666 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
668 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
670 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
671 [23509] dynamic-link: CET enabled glibc is incompatible with the older
673 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
674 [23521] nss: get_next_alias nss_files file stream leak
675 [23538] nptl: Hang in pthread_cond_broadcast
676 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
677 [23578] regex: Invalid memory access if regex pattern contains NUL byte
678 [23579] libc: Errors misreported in preadv2
679 [23597] build: support/test-container.c doesn't work with different
681 [23603] time: mktime signed integer overflow on large timestamps
682 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
683 [23614] libc: powerpc: missing CFI register information in __mpn_*
685 [23637] string: Generic strstr/strcasestr fails with huge needles
686 [23640] libc: no way to easily clear FD_CLOEXEC in
687 posix_spawn_file_actions_adddup2()
688 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
690 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
692 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
693 [23689] libc: Bug in documentation for rusage.ru_ixrss in
694 bits/types/struct_rusage.h
695 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
697 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
699 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
700 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
701 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
703 [23724] localedata: Albanian date formats are incorrect
704 [23735] math: libnldbl_nonshared.a references internal libm symbols
705 [23740] localedata: kl_GL: Month names and date formats need update
706 [23744] regex: regex refactorings to remove BE, avoid duplication
707 [23745] time: mktime fix for Gnulib + coreutils
708 [23758] time: Improve the width of alternate representation for year in
710 [23783] libc: [mips] Missing CMSPAR bits/termios.h
711 [23789] time: mktime does not set errno on failure
712 [23791] localedata: Wrong monetary format for ca_ES locale
713 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
714 [23794] locale: c16rtomb does not handle surrogate pairs
715 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
716 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
717 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
718 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
719 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
720 [23862] libc: [sh] missing kernel-features.h undefines
721 [23864] libc: [riscv] missing kernel-features.h undefines
722 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
723 [23907] malloc: Incorrect double-free malloc tcache check disregards
725 [23913] libc: off-by-one in function maybe_script_execute in
726 sysdeps/posix/spawni.c
727 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
728 [23923] locale: Add --no-hard-links option to localedef
729 [23927] network: Linux if_nametoindex() does not close descriptor
731 [23961] math: powf can overflow to inf without setting errno in non-
732 nearest rounding mode
733 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
734 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
735 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
736 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
737 [24011] localedata: Fixed small type in comment for locale bs_BA
738 [24018] libc: gettext() may return NULL
739 [24022] build: riscv build failure with Linux kernel 4.20-rc7
740 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
741 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
743 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
744 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
746 [24046] localedata: en_US locale doesn't define date_fmt
747 [24063] manual: @var{errno} should be @code{errno}
748 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
749 [24088] libc: VSCR field is not being correctly read in ucontext_t on
751 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
753 [24097] string: Can't use 64-bit register for size_t in assembly codes for
755 [24110] hurd: SS_DISABLE never set in stack_t value returned by
757 [24112] network: Do not send DNS queries for non-host names (where all
758 answers will be rejected)
759 [24130] libc: alpha __remqu corrupts $f3 register
766 * The localization data for ISO 14651 is updated to match the 2016
767 Edition 4 release of the standard, this matches data provided by
768 Unicode 9.0.0. This update introduces significant improvements to the
769 collation of Unicode characters. This release deviates slightly from
770 the standard in that the collation element ordering for lowercase and
771 uppercase LATIN script characters is adjusted to ensure that regular
772 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
773 is not matched by [a-z]. With the update many locales have been
774 updated to take advantage of the new collation information. The new
775 collation information has increased the size of the compiled locale
776 archive or binary locales.
778 * The GNU C Library can now be compiled with support for Intel CET, AKA
779 Intel Control-flow Enforcement Technology. When the library is built
780 with --enable-cet, the resulting glibc is protected with indirect
781 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
782 compatible with all existing executables and shared libraries. This
783 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
784 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
785 capable of multi-byte NOPs, like x86-64 processors as well as Intel
786 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
787 x86_64 and x32 on non-CET processors. --enable-cet has been tested
788 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
791 * The GNU C Library now has correct support for ABSOLUTE symbols
792 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
793 relocated incorrectly or in some cases discarded. The GNU linker can
794 make use of the newer semantics, but it must communicate it to the
795 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
796 field) to indicate such support is required.
798 * Unicode 11.0.0 Support: Character encoding, character type info, and
799 transliteration tables are all updated to Unicode 11.0.0, using
800 generator scripts contributed by Mike FABIAN (Red Hat).
802 * <math.h> functions that round their results to a narrower type are added
803 from TS 18661-1:2014 and TS 18661-3:2015:
805 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
808 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
811 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
814 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
817 * Two grammatical forms of month names are now supported for the following
818 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
819 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
820 support two grammatical forms in abbreviated month names: Catalan, Greek,
823 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
824 include the support for two grammatical forms of month names.
826 * Building and running on GNU/Hurd systems now works without out-of-tree
829 * The renameat2 function has been added, a variant of the renameat function
830 which has a flags argument. If the flags are zero, the renameat2 function
831 acts like renameat. If the flag is not zero and there is no kernel
832 support for renameat2, the function will fail with an errno value of
833 EINVAL. This is different from the existing gnulib function renameatu,
834 which performs a plain rename operation in case of a RENAME_NOREPLACE
835 flags and a non-existing destination (and therefore has a race condition
836 that can clobber the destination inadvertently).
838 * The statx function has been added, a variant of the fstatat64
839 function with an additional flags argument. If there is no direct
840 kernel support for statx, glibc provides basic stat support based on
841 the fstatat64 function.
843 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
844 library if installed. libidn2 version 2.0.5 or later is recommended. If
845 libidn2 is not available, internationalized domain names are not encoded
846 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
847 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
848 with an encoding error.) Flags which used to change the IDN encoding and
849 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
850 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
851 deprecated. They no longer have any effect.
853 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
854 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
855 range of ELF gABI expressions including such constructs as
856 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
857 have been further restricted, and where in the past a dynamic string
858 token sequence may have been interpreted as a literal string it will
859 now cause a load failure. These load failures were always considered
860 unspecified behaviour from the perspective of the dynamic loader, and
861 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
862 results in a load failure now.
864 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
865 implementation includes all the standard functions provided by
868 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
869 thrd_detach, thrd_exit, and thrd_join for thread management.
871 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
872 mtx_destroy for mutual exclusion.
874 - call_once for function call synchronization.
876 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
877 cnd_wait for conditional variables.
879 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
881 Application developers must link against libpthread to use ISO C threads.
883 Deprecated and removed features, and other changes affecting compatibility:
885 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
886 installed. Software that was using either header should be updated to
887 use standard <stdio.h> interfaces instead.
889 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
890 This was never required by the C standard, and the macros just expanded
891 to call alternative names for the same functions. If you hoped getc and
892 putc would provide performance improvements over fgetc and fputc, instead
893 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
894 necessary, flockfile and funlockfile.
896 * All stdio functions now treat end-of-file as a sticky condition. If you
897 read from a file until EOF, and then the file is enlarged by another
898 process, you must call clearerr or another function with the same effect
899 (e.g. fseek, rewind) before you can read the additional data. This
900 corrects a longstanding C99 conformance bug. It is most likely to affect
901 programs that use stdio to read interactive input from a terminal.
904 * The macros 'major', 'minor', and 'makedev' are now only available from
905 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
906 headers that happen to include <sys/types.h>. These macros are rarely
907 used, not part of POSIX nor XSI, and their names frequently collide with
908 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
911 <sys/sysmacros.h> is a GNU extension. Portable programs that require
912 these macros should first include <sys/types.h>, and then include
913 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
915 * The tilegx*-*-linux-gnu configurations are no longer supported.
917 * The obsolete function ustat is no longer available to newly linked
918 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
919 function has been deprecated in favor of fstatfs and statfs.
921 * The obsolete function nfsservctl is no longer available to newly linked
922 binaries. This function was specific to systems using the Linux kernel
923 and could not usefully be used with the GNU C Library on systems with
924 version 3.1 or later of the Linux kernel.
926 * The obsolete function name llseek is no longer available to newly linked
927 binaries. This function was specific to systems using the Linux kernel
928 and was not declared in a header. Programs should use the lseek64 name
929 for this function instead.
931 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
932 getaddrinfo and getnameinfo functions have been deprecated. The behavior
933 previously selected by them is now always enabled.
935 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
936 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
937 restriction (rejecting '_' in host names, among other things) has been
938 removed, for increased compatibility with non-IDN name resolution.
940 * The fcntl function now have a Long File Support variant named fcntl64. It
941 is added to fix some Linux Open File Description (OFD) locks usage on non
942 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
943 fcntl and LFS support is handled transparently. Also for Linux, the OFD
944 locks act as a cancellation entrypoint.
946 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
947 ecb_crypt, and des_setparity are no longer available to newly linked
948 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
949 longer installed. These functions encrypted and decrypted data with the
950 DES block cipher, which is no longer considered secure. Software that
951 still uses these functions should switch to a modern cryptography library,
954 * Reflecting the removal of the encrypt and setkey functions above, the
955 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
956 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
959 * The obsolete function fcrypt is no longer available to newly linked
960 binaries. It was just another name for the standard function crypt,
961 and it has not appeared in any header file in many years.
963 * We have tentative plans to hand off maintenance of the passphrase-hashing
964 library, libcrypt, to a separate development project that will, we hope,
965 keep up better with new passphrase-hashing algorithms. We will continue
966 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
967 'crypt_r' should not need to change at all; however, distributions will
968 need to install <crypt.h> and libcrypt from a separate project.
970 In this release, if the configure option --disable-crypt is used, glibc
971 will not install <crypt.h> or libcrypt, making room for the separate
972 project's versions of these files. The plan is to make this the default
973 behavior in a future release.
975 Changes to build and runtime requirements:
977 GNU make 4.0 or later is now required to build glibc.
979 Security related changes:
981 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
982 been fixed by removing the glibc-internal IDNA implementation and using
983 the system-provided libidn2 library instead. Originally reported by Hanno
984 Böck and Christian Weisgerber.
986 CVE-2017-18269: An SSE2-based memmove implementation for the i386
987 architecture could corrupt memory. Reported by Max Horn.
989 CVE-2018-11236: Very long pathname arguments to realpath function could
990 result in an integer overflow and buffer overflow. Reported by Alexey
993 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
994 architecture could write beyond the target buffer, resulting in a buffer
995 overflow. Reported by Andreas Schwab.
997 The following bugs are resolved with this release:
999 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1000 [6889] manual: 'PWD' mentioned but not specified
1001 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1002 when __WORDSIZE != 64
1003 [13762] regex: re_search etc. should return -2 on memory exhaustion
1004 [13888] build: /tmp usage during testing
1005 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1006 [14092] nptl: Support C11 threads
1007 [14095] localedata: Review / update collation data from Unicode / ISO
1009 [14508] libc: -Wformat warnings
1010 [14553] libc: Namespace pollution loff_t in sys/types.h
1011 [14890] libc: Make NT_PRFPREG canonical.
1012 [15105] libc: Extra PLT references with -Os
1013 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1015 [16335] manual: Feature test macro documentation incomplete and out of
1017 [16552] libc: Unify umount implementations in terms of umount2
1018 [17082] libc: htons et al.: statement-expressions prevent use on global
1019 scope with -O1 and higher
1020 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1021 [17438] localedata: pt_BR: wrong d_fmt delimiter
1022 [17662] libc: please implement binding for the new renameat2 syscall
1023 [17721] libc: __restrict defined as /* Ignore */ even in c11
1024 [17979] libc: inconsistency between uchar.h and stdint.h
1025 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1026 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1027 horrible machine code)
1028 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1030 [18471] libc: llseek should be a compat symbol
1031 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1033 [18991] nss: nss_files skips large entry in database
1034 [19239] libc: Including stdlib.h ends up with macros major and minor being
1036 [19463] libc: linknamespace failures when compiled with -Os
1037 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1038 [19527] locale: Normalized charset name not recognized by setlocale
1039 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1040 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1042 [19728] network: out of bounds stack read in libidn function
1043 idna_to_ascii_4i (CVE-2016-6261)
1044 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1045 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1046 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1048 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1049 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1050 [20419] dynamic-link: files with large allocated notes crash in
1052 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1053 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1054 [20980] manual: CFLAGS environment variable replaces vital options
1055 [21163] regex: Assertion failure in pop_fail_stack when executing a
1056 malformed regexp (CVE-2015-8985)
1057 [21234] manual: use of CFLAGS makes glibc detect no optimization
1058 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1059 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1060 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1061 [21508] locale: intl/tst-gettext failure with latest msgfmt
1062 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1063 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1064 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1066 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1068 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1069 [22247] network: Integer overflow in the decode_digit function in
1070 puny_decode.c in libidn (CVE-2017-14062)
1071 [22342] nscd: NSCD not properly caching netgroup
1072 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1073 [22550] localedata: es_ES locale (and other es_* locales): collation
1074 should treat ñ as a primary different character, sync the collation
1075 for Spanish with CLDR
1076 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1077 by gcc configured with --enable-default-pie
1078 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1079 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1080 crossing 2GB threshold (CVE-2017-18269)
1081 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1083 [22735] time: Misleading typo in time.h source comment regarding
1085 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1086 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1087 `__assert_perror_fail ()' to `__assert_fail_base ()'
1088 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1090 [22786] libc: Stack buffer overflow in realpath() if input size is close
1091 to SSIZE_MAX (CVE-2018-11236)
1092 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1093 through an absolute DT_NEEDED path
1094 [22792] build: tcb-offsets.h dependency dropped
1095 [22797] libc: pkey_get() uses non-reserved name of argument
1096 [22807] libc: PTRACE_* constants missing for powerpc
1097 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1098 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1099 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1100 [22848] localedata: ca_ES: update date definitions from CLDR
1101 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1102 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1103 [22896] localedata: Update locale data for an_ES
1104 [22902] math: float128 test failures with GCC 8
1105 [22918] libc: multiple common of `__nss_shadow_database'
1106 [22919] libc: sparc32: backtrace yields infinite backtrace with
1108 [22926] libc: FTBFS on powerpcspe
1109 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1111 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1112 [22947] libc: FAIL: misc/tst-preadvwritev2
1113 [22963] localedata: cs_CZ: Add alternative month names
1114 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1115 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1116 [22998] dynamic-link: execstack tests are disabled when SELinux is
1118 [23005] network: Crash in __res_context_send after memory allocation
1120 [23007] math: strtod cannot handle -nan
1121 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1122 [23036] regex: regex equivalence class regression
1123 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1124 [23069] libc: sigaction broken on riscv64-linux-gnu
1125 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1126 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1127 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1128 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1129 and libc build with -Os)
1130 [23140] localedata: More languages need two forms of month names
1131 [23145] libc: _init/_fini aren't marked as hidden
1132 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1133 [23171] math: C++ iseqsig for long double converts arguments to double
1134 [23178] nscd: sudo will fail when it is run in concurrent with commands
1135 that changes /etc/passwd
1136 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1138 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1139 [23208] localedata: New locale - Lower Sorbian (dsb)
1140 [23233] regex: Memory leak in build_charclass_op function in file
1142 [23236] stdio: Harden function pointers in _IO_str_fields
1143 [23250] nptl: Offset of __private_ss differs from GCC
1144 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1145 -mtune=generic -mfpmath=sse
1146 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1148 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1149 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1151 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1152 [23277] math: nan function should not have const attribute
1153 [23279] math: scanf and strtod wrong for some hex floating-point
1154 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1156 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1157 [23303] build: undefined reference to symbol
1158 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1159 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1161 [23313] stdio: libio vtables validation and standard file object
1163 [23329] libc: The __libc_freeres infrastructure is not properly run across
1165 [23349] libc: Various glibc headers no longer compatible with
1167 [23351] malloc: Remove unused code related to heap dumps and malloc
1169 [23363] stdio: stdio-common/tst-printf.c has non-free license
1170 [23396] regex: Regex equivalence regression in single-byte locales
1171 [23422] localedata: oc_FR: More updates of locale data
1172 [23442] build: New warning with GCC 8
1173 [23448] libc: Out of bounds access in IBM-1390 converter
1174 [23456] libc: Wrong index_cpu_LZCNT
1175 [23458] build: tst-get-cpu-features-static isn't added to tests
1176 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1178 [23467] dynamic-link: x86/CET: A property note parser bug
1185 * The GNU C Library can now be compiled with support for building static
1186 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1187 executables are like static executables but can be loaded at any address
1188 and provide additional security hardening benefits at the cost of some
1189 memory and performance. When the library is built with --enable-static-pie
1190 the resulting libc.a is usable with GCC 8 and above to create static PIE
1191 executables using the GCC option '-static-pie'. This feature is currently
1192 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1193 aarch64 with binutils 2.30 or later.
1195 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1196 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1199 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1201 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1203 * In order to support faster and safer process termination the malloc API
1204 family of functions will no longer print a failure address and stack
1205 backtrace after detecting heap corruption. The goal is to minimize the
1206 amount of work done after corruption is detected and to avoid potential
1207 security issues in continued process execution. Reducing shutdown time
1208 leads to lower overall process restart latency, so there is benefit both
1209 from a security and performance perspective.
1211 * The abort function terminates the process immediately, without flushing
1212 stdio streams. Previous glibc versions used to flush streams, resulting
1213 in deadlocks and further data corruption. This change also affects
1214 process aborts as the result of assertion failures.
1216 * On platforms where long double has the IEEE binary128 format (aarch64,
1217 alpha, mips64, riscv, s390 and sparc), the math library now implements
1218 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1219 These are the same interfaces added in version 2.26 for some platforms where
1220 this format is supported but is not the format of long double.
1222 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1223 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1224 implements interfaces for that type, as defined by ISO/IEC TS
1225 18661-3:2015. These are corresponding interfaces to those supported for
1228 * The math library now implements interfaces for the _Float32, _Float64 and
1229 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1230 corresponding interfaces to those supported for _Float128.
1232 * glibc now implements the memfd_create and mlock2 functions on Linux.
1234 * Support for memory protection keys was added. The <sys/mman.h> header now
1235 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1238 * The copy_file_range function was added.
1240 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1242 * The ldconfig utility now processes `include' directives using the C/POSIX
1243 collation ordering. Previous glibc versions used locale-specific
1244 ordering, the change might break systems that relied on that.
1246 * Support for two grammatical forms of month names has been added.
1247 In a call to strftime, the "%B" and "%b" format specifiers will now
1248 produce the grammatical form required when the month is used as part
1249 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1250 required when the month is named by itself. For instance, in Greek
1251 and in many Slavic and Baltic languages, "%B" will produce the month
1252 in genitive case, and "%OB" will produce the month in nominative case.
1254 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1255 are all valid and will all accept any known form of month
1256 name---standalone or complete, abbreviated or full. In a call to
1257 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1258 the strings used by "%B" and "%b", respectively. New query
1259 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1260 used by "%OB" and "%Ob", respectively.
1262 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1263 define the strings for %OB and %Ob, respectively; these have the
1264 same syntax as "mon" and "abmon". These arrays are optional; if they
1265 are not provided then they have the same content as "mon" and "abmon",
1268 These features are provided for locales which define "alt_mon" and/or
1269 "ab_alt_mon" in their locale source data. This release includes such
1270 alternative month name data for the following languages: Belarusian,
1271 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1273 This feature is currently a GNU extension, but it is expected to
1274 be added to the next revision of POSIX, and it is also already
1275 available on some BSD-derived operating systems.
1277 This feature will cause existing statically compiled applications
1278 to fail to load locales and fall back to the builtin C/POSIX locales.
1279 See notes below for other changes affecting compatibility.
1281 * Support for the RISC-V ISA running on Linux has been added. This port
1282 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1283 for the following ISA and ABI pairs:
1289 Deprecated and removed features, and other changes affecting compatibility:
1291 * Statically compiled applications attempting to load locales compiled for the
1292 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1293 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1294 support for two grammatical forms of the month names, also extends the locale
1295 data binary format. Static applications needing locale support must be
1296 recompiled to match the runtime and data they are deployed with. In some
1297 distributions there is an upgrade window where dynamically linked applications
1298 may use a new library but the old locale data and also fall back to the
1299 builtin C/POSIX locales; restarting the application process is sufficient to
1302 * Support for statically linked applications which call dlopen is deprecated
1303 and will be removed in a future version of glibc. Applications which call
1304 dlopen need to be linked dynamically instead.
1306 * Support for old programs which use internal stdio data structures and
1307 functions is deprecated. This includes programs which use the C++ streams
1308 provided by libstdc++ in GCC 2.95. Programs which use the internal
1309 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1310 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1311 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1312 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1313 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1314 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1315 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1316 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1317 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1318 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1319 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1320 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1321 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1322 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1323 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1324 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1325 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1326 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1327 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1328 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1329 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1330 future version of glibc. Unlike other symbol removals, these old
1331 applications will not be supported using compatibility symbols.
1333 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1334 defined by <sys/ptrace.h>.
1336 * libm no longer supports SVID error handling (calling a user-provided
1337 matherr function on error) or the _LIB_VERSION variable to control error
1338 handling. (SVID error handling and the _LIB_VERSION variable still work
1339 for binaries linked against older versions of the GNU C Library.) The
1340 libieee.a library is no longer provided. math.h no longer defines struct
1341 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1342 TLOSS, PLOSS and HUGE.
1344 * The libm functions pow10, pow10f and pow10l are no longer supported for
1345 new programs. Programs should use the standard names exp10, exp10f and
1346 exp10l for these functions instead.
1348 * The mcontext_t type is no longer the same as struct sigcontext. On
1349 platforms where it was previously the same, this changes the C++ name
1350 mangling for interfaces involving this type.
1352 * The add-ons mechanism for building additional packages at the same time as
1353 glibc has been removed. The --enable-add-ons configure option is now
1356 * The --without-fp configure option is now ignored. Whether hardware
1357 floating-point instructions are used is now configured based on whether
1358 the compiler used at configure time (without any options implied by a
1359 --with-cpu= configure option) uses such instructions.
1361 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1362 the specified string can be parsed as a domain name.
1364 * In the malloc_info output, the <heap> element may contain another <aspace>
1365 element, "subheaps", which contains the number of sub-heaps.
1367 * The libresolv function p_secstodate is no longer supported for new
1370 * The tilepro-*-linux-gnu configuration is no longer supported.
1372 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1373 and will be removed in a future release. Software that is still using
1374 either header should be updated to use standard <stdio.h> interfaces
1377 libio.h was originally the header for a set of supported GNU extensions,
1378 but they have not been maintained as such in many years, they are now
1379 standing in the way of improvements to stdio, and we don't think there are
1380 any remaining external users. _G_config.h was never intended for public
1381 use, but predates the bits convention.
1383 Changes to build and runtime requirements:
1385 * bison version 2.7 or later is required to generate code in the 'intl'
1388 Security related changes:
1390 CVE-2009-5064: The ldd script would sometimes run the program under
1391 examination directly, without preventing code execution through the
1392 dynamic linker. (The glibc project disputes that this is a security
1393 vulnerability; only trusted binaries must be examined using the ldd
1396 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1397 suffered from a one-byte overflow during ~ operator processing (either
1398 on the stack or the heap, depending on the length of the user name).
1399 Reported by Tim RĂŒhsen.
1401 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1402 would sometimes fail to free memory allocated during ~ operator
1403 processing, leading to a memory leak and, potentially, to a denial
1406 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1407 without GLOB_NOESCAPE, could write past the end of a buffer while
1408 unescaping user names. Reported by Tim RĂŒhsen.
1410 CVE-2017-17426: The malloc function, when called with an object size near
1411 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1412 instead of NULL. This was a regression introduced with the new malloc
1413 thread cache in glibc 2.26. Reported by Iain Buclaw.
1415 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1416 to the allocation of too much memory. (This is not a security bug per se,
1417 it is mentioned here only because of the CVE assignment.) Reported by
1420 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1421 of the number of search path components. (This is not a security
1422 vulnerability per se because no trust boundary is crossed if the fix for
1423 CVE-2017-1000366 has been applied, but it is mentioned here only because
1424 of the CVE assignment.) Reported by Qualys.
1426 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1427 for AT_SECURE or SUID binaries could be used to load libraries from the
1430 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1431 succeeds without returning an absolute path due to unexpected behaviour
1432 of the Linux kernel getcwd syscall. Reported by halfdog.
1434 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1435 an object size near the value of SIZE_MAX, would return a pointer to a
1436 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1438 CVE-2018-6551: The malloc function, when called with an object size near
1439 the value of SIZE_MAX, would return a pointer to a buffer which is too
1440 small, instead of NULL.
1442 The following bugs are resolved with this release:
1444 [866] glob: glob should match dangling symlinks
1445 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1446 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1448 [5997] math: Very slow execution of sinf function
1449 [10580] localedata: hr_HR: updated locale
1450 [10871] locale: 'mon' array should contain both nominative and genitive
1452 [12349] localedata: eu_ES: incorrect thousands separator
1453 [13605] localedata: shn_MM: new Shan locale
1454 [13805] localedata: ru_RU: currency should use ',' as radix point
1455 [13953] localedata: km_KH: locale update
1456 [13994] localedata: mjw_IN: new locale
1457 [14121] build: make writes .mo files in po directory
1458 [14333] libc: Fix the race between atexit() and exit()
1459 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1460 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1462 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1463 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1464 width Latin characters
1465 [15332] localedata: es_CU: locale update
1466 [15436] stdio: Don't close or flush stdio streams on abort
1467 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1469 [16148] localedata: ca_ES: incorrect thousands separator
1470 [16750] dynamic-link: ldd should not try to execute the binaries
1472 [16777] localedata: pl_PL: incorrect thousands separator in locale
1473 [16905] localedata: hanzi: new collation
1474 [17563] localedata: cmn_TW: add hanzi collation
1475 [17750] localedata: wrong collation order of diacritics in most locales
1476 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1478 [17956] build: Build fails on missing definitions from header file
1479 nss/nss.h when Mozilla NSS is used for cryptography
1480 [18203] libc: realpath() does not handle unreachable paths correctly
1481 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1482 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1483 [18822] libc: Internal functions are called via PLT
1484 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1485 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1486 [19574] libc: glibc should support building static PIE binaries
1487 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1489 [19971] glob: glob: Do not skip entries with zero d_ino values
1490 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1491 [20008] localedata: km_KH: convert to translit_neutral
1492 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1493 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1494 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1495 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1496 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1498 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1499 they're set, wrong errors returned by gaih_inet when lookup functions
1501 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1502 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1504 [20952] localedata: yuw_PG: new locale
1505 [21084] localedata: charmaps/IBM858: new codepage
1506 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1507 [21242] libc: assert gives pedantic warning in old gcc versions
1508 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1509 __regcall calling convention
1510 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1511 [21326] libc: C99 functions are not declared for C++11 and later if
1512 _GNU_SOURCE is not predefined by g++
1513 [21457] libc: sys/ucontext.h namespace
1514 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1515 [21660] math: GCC fails to compile a formula with tgmath.h
1516 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1517 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1518 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1519 [21684] math: tgmath.h handling of complex integers
1520 [21685] math: tgmath.h handling of bit-fields
1521 [21686] math: tgmath.h handling of __int128
1522 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1524 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1526 [21750] localedata: column width of characters incompatible with classical
1528 [21754] malloc: malloc: Perform as little work as possible after heap
1529 consistency check failures
1530 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1531 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1532 [21791] string: Unused XXX_chk_XXX functions in libc.a
1533 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1535 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1537 [21845] localedata: Added new Locale bho_NP
1538 [21853] localedata: Fix abday Which looks same as day in zh_SG
1539 [21854] localedata: Added New Locale en_SC
1540 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1541 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1542 _dl_runtime_resolve_avx_slow
1543 [21885] network: getaddrinfo: gethosts does not release resolver context
1544 on memory allocation failure
1545 [21899] libc: XPG4.2 sigaction namespace
1546 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1548 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1550 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1551 errno value, causing getaddrinfo to fail
1552 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1553 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1554 instead of EAI_NODATA
1555 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1556 constant PTRACE_SEIZE_DEVEL
1557 [21930] math: C-only gcc builtins used in <math.h> isinf
1558 [21932] network: Unpaired __resolv_context_get in generic get*_r
1560 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1561 [21944] libc: sigval namespace
1562 [21951] localedata: Update hanzi collation by stroke
1563 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1564 sysdeps/x86_64/fpu/e_expf.S
1565 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1566 allocation in syscall loops)
1567 [21959] localedata: Fix Country name for xh_ZA
1568 [21960] localedata: Fix abmon for bem_ZM
1569 [21966] math: AVX2 mathvec functions use FMA without checking
1570 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1571 [21971] localedata: Added New Locale for mfe_MU
1572 [21972] libc: assert macro requires operator== (int) for its argument type
1573 [21973] math: [sparc] libm missing sqrtl compat symbol
1574 [21974] libc: Remove __bb_init_func and __bb_exit_func
1575 [21982] string: stratcliff.c: error: assuming signed overflow does not
1577 [21986] stdio: __guess_grouping is called incorrectly
1578 [21987] math: [sparc32] wrong bits/long-double.h installed
1579 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1581 [22022] localedata: Missing country_name for mni_IN
1582 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1584 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1586 [22026] locale: iconv_open: heap overflow on gconv_init failure
1587 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1588 [22035] math: [m68k] bits/math-inline.h macro namespace
1589 [22038] localedata: Fix abbreviated weeks and months for Somali
1590 [22044] localedata: Remove redundant data for Limburgish Language
1591 [22050] malloc: Linking with -lmcheck does not hook
1592 __malloc_initialize_hook correctly
1593 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1594 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1595 [22070] localedata: charmaps/UTF-8: wcwidth for
1596 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1597 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1598 Jungseong and Jongseong) should be 0
1599 [22078] nss: nss_files performance issue in multi mode
1600 [22082] math: bits/math-finite.h exp10 condition
1601 [22086] libc: pcprofiledump incorrect cross-endian condition
1602 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1603 [22095] network: Name server address allocation memory leak in resolv.conf
1605 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1607 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1608 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1610 [22111] malloc: malloc: per thread cache is not returned when thread exits
1611 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1612 [22134] libc: [linux] implement fexecve with execveat
1613 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1615 [22145] libc: ttyname() gives up too early in the face of namespaces
1616 [22146] math: C++ build issue with float128 on x86_64
1617 [22153] nptl: nptl: save error code before process termination
1618 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1619 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1620 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1621 [22165] libc: [hppa] Text relocations in libc.so
1622 [22180] libc: destructor registered via __cxa_atexit is called twice
1623 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1624 symlinks") cause "make" segfaults
1625 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1627 [22207] libc: FAIL: stdlib/test-atexit-race
1628 [22225] math: nearbyint arithmetic moved before feholdexcept
1629 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1630 [22235] math: iscanonical in C++ and float128
1631 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1632 the svid compat wrapper
1633 [22244] math: ynf and yn are wrong without the svid compat wrapper
1634 [22273] libc: Improper assert in Linux posix_spawn implementation
1635 [22284] libc: -pg -pie doesn't work
1636 [22292] locale: localedef exits with error 4 when it should be error 1
1637 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1638 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1640 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1641 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1643 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1644 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1645 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1646 [22322] libc: [mips64] wrong bits/long-double.h installed
1647 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1648 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1650 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1651 [22343] malloc: Integer overflow in posix_memalign
1652 [22347] libc: getrandom() returns the number of bytes that were copied to
1653 the buffer even though the comments say "Return 0 on success and -1 on
1655 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1656 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1658 [22370] dynamic-link: Incorrect note padding check
1659 [22375] libc: malloc returns pointer from tcache_get when should return
1660 NULL (CVE-2017-17426)
1661 [22377] math: iseqsig, float128 and C++
1662 [22382] localedata: Error in tpi_PG locale
1663 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1664 inside the ASCII printable range
1665 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1667 [22403] localedata: Slash needs escaping in some locales
1668 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1669 [22409] network: res_hnok does not accept some host names used on the
1671 [22412] network: res_dnok, res_hnok should perform syntax checks
1672 [22413] network: ns_name_pton ignores syntactically invalid trailing
1674 [22415] stdio: setvbuf can lead to invalid free/segfault
1675 [22432] build: Non-deterministic build
1676 [22439] malloc: malloc_info should compute summary statistics for all sub-
1678 [22442] network: if_nametoindex could report index for the wrong
1679 networking interface
1680 [22446] build: aliasing violation calling readlink in handle_request
1681 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1682 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1683 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1684 __nscd_hash/__nss_hash
1685 [22463] network: p_secstodate overflow handling
1686 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1687 [22478] libc: sigwait can fail with EINTR
1688 [22505] libc: ldconfig processes include directive in locale-specific
1690 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1691 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1692 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1693 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1694 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1695 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1696 same as for Croatian
1697 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1698 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1699 [22577] libc: missing newline after "cannot allocate TLS data structures
1701 [22588] manual: manual/conf.texi: missing underscore in front of
1703 [22593] math: nextafter and nexttoward are declared with const attribute
1704 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1705 [22603] string: ia64 memchr overflows internal pointer check
1706 [22605] libc: SH clone does not set the exit code correctly
1707 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1709 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1710 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1711 modified in case of success
1712 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1713 [22615] manual: manual: ambiguous wording about errno value in case of
1715 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1717 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1718 binaries or if /proc is not mounted (CVE-2017-16997)
1719 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1720 [22630] build: $(no-pie-ldflag) is no longer effective
1721 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1722 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1723 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1724 [22637] nptl: guard size is subtracted from thread stack size instead of
1726 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1727 [22657] localedata: hu_HU: Avoid double space in date
1728 [22660] math: fmax, fmin sNaN handling on alpha
1729 [22664] libc: New warning of GCC8
1730 [22665] math: alpha: ceil and floor raise inexact exceptions
1731 [22666] math: alpha: trunc raise inexact exceptions
1732 [22667] libc: makecontext lacks stack alignment on i386
1733 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1734 [22679] libc: getcwd(3) can succeed without returning an absolute path
1736 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1737 elision and tunables
1738 [22687] math: [powerpc-nofpu] complex long double functions spurious
1740 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1741 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1742 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1744 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1745 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1747 [22701] nis: Incomplete removal of libnsl
1748 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1749 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1750 [22715] dynamic-link: FAIL: elf/tst-audit10
1751 [22719] libc: Backtrace tests fail on hppa
1752 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1753 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1754 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1755 before the first call to crypt_r () in crypt/badsalttest.c
1762 * A per-thread cache has been added to malloc. Access to the cache requires
1763 no locks and therefore significantly accelerates the fast path to allocate
1764 and free small amounts of memory. Refilling an empty cache requires locking
1765 the underlying arena. Performance measurements show significant gains in a
1766 wide variety of user workloads. Workloads were captured using a special
1767 instrumented malloc and analyzed with a malloc simulator. Contributed by
1768 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1770 * Unicode 10.0.0 Support: Character encoding, character type info, and
1771 transliteration tables are all updated to Unicode 10.0.0, using
1772 generator scripts contributed by Mike FABIAN (Red Hat).
1773 These updates cause user visible changes, especially the changes in
1774 wcwidth for many emoji characters cause problems when emoji sequences
1775 are rendered with pango, see for example:
1776 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1778 * Collation of Hungarian has been overhauled and is now consistent with "The
1779 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1782 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1784 - The GNU C Library will now detect when /etc/resolv.conf has been
1785 modified and reload the changed configuration. The new resolver option
1786 âno-reloadâ (RES_NORELOAD) disables this behavior.
1788 - The GNU C Library now supports an arbitrary number of search domains
1789 (configured using the âsearchâ directive in /etc/resolv.conf);
1790 previously, there was a hard limit of six domains. For backward
1791 compatibility, applications that directly modify the â_resâ global
1792 object are still limited to six search domains.
1794 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1795 Library will now randomly pick a name server from the configuration as a
1796 starting point. (Previously, the second name server was always used.)
1798 * The tunables feature is now enabled by default. This allows users to tweak
1799 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1801 * New function reallocarray, which resizes an allocated block (like realloc)
1802 to the product of two sizes, with a guaranteed clean failure upon integer
1803 overflow in the multiplication. Originally from OpenBSD, contributed by
1804 Dennis Wölfing and RĂŒdiger Sonderfeld.
1806 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1807 These are extended versions of preadv and pwritev, respectively, taking an
1808 additional flags argument. The set of supported flags depends on the
1809 running kernel; full support currently requires kernel 4.7 or later.
1811 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1812 create a new session ID for the spawned process. This feature is
1813 scheduled to be added to the next major revision of POSIX; for the time
1814 being, it is available under _GNU_SOURCE.
1816 * errno.h is now safe to use from C-preprocessed assembly language on all
1817 supported operating systems. In this context, it will only define the
1818 Exxxx constants, as preprocessor macros expanding to integer literals.
1820 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1821 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1822 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1823 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1825 To compile programs that use this feature, the compiler must support
1826 128-bit floating point with the type name _Float128 (as defined by TS
1827 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1828 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1829 must be defined to make the new interfaces visible.
1831 The new functions and macros correspond to those present for other
1832 floating-point types (except for a few obsolescent interfaces not
1833 supported for the new type), with F128 or f128 suffixes; for example,
1834 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1835 printf or scanf formats for the new type; the strfromf128 and strtof128
1836 interfaces should be used instead.
1838 Deprecated and removed features, and other changes affecting compatibility:
1840 * The synchronization that pthread_spin_unlock performs has been changed to
1841 now be equivalent to a C11 atomic store with release memory order to the
1842 spin lock's memory location. Previously, several (but not all)
1843 architectures used stronger synchronization (e.g., containing what is
1844 often called a full barrier). This change can improve performance, but
1845 may affect odd fringe uses of spin locks that depend on the previous
1846 behavior (e.g., using spin locks as atomic variables to try to implement
1847 Dekker's mutual exclusion algorithm).
1849 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1852 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1853 will only be built and installed when the GNU C Library is configured with
1854 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1855 as TIRPC or rpcsvc-proto, to be used.
1857 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1858 libnss_compat, are deprecated, and will not be built or installed by
1861 The NIS(+) support library, libnsl, is also deprecated. By default, a
1862 compatibility shared library will be built and installed, but not headers
1863 or development libraries. Only a few NIS-related programs require this
1864 library. (In particular, the GNU C Library has never required programs
1865 that use 'gethostbyname' to be linked with libnsl.)
1867 Replacement implementations based on TIRPC, which additionally support
1868 IPv6, are available from <https://github.com/thkukuk/>. The configure
1869 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1870 name service modules, to be built and installed.
1872 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1873 support is enabled, the configured recursive resolver must support EDNS.
1874 (Responding to EDNS-enabled queries with responses which are not
1875 EDNS-enabled is fine, but FORMERR responses are not.)
1877 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1878 servers have not supported this opcode for a long time.
1880 * The _res_opcodes variable has been removed from libresolv. It had been
1881 exported by accident.
1883 * <string.h> no longer includes inline versions of any string functions,
1884 as this kind of optimization is better done by the compiler. The macros
1885 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1887 * The nonstandard header <xlocale.h> has been removed. Most programs should
1888 use <locale.h> instead. If you have a specific need for the definition of
1889 locale_t with no other declarations, please contact
1890 libc-alpha@sourceware.org and explain.
1892 * The obsolete header <sys/ultrasound.h> has been removed.
1894 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1896 * The obsolete function cfree has been removed. Applications should use
1899 * The stack_t type no longer has the name struct sigaltstack. This changes
1900 the C++ name mangling for interfaces involving this type.
1902 * The ucontext_t type no longer has the name struct ucontext. This changes
1903 the C++ name mangling for interfaces involving this type.
1905 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1906 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1907 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1908 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1909 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1910 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1911 fpregset_t type no longer has the name struct fpu. This changes the C++
1912 name mangling for interfaces involving those types.
1914 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1915 synced with the kernel:
1917 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1918 are not supported on this architecture and have been removed.
1920 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1921 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1922 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1924 Programs that assume the GET/SETREGS ptrace requests are universally
1925 available will now fail to build, instead of malfunctioning at runtime.
1927 Changes to build and runtime requirements:
1929 * Linux kernel 3.2 or later is required at runtime, on all architectures
1930 supported by that kernel. (This is a change from version 2.25 only for
1933 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1935 * On most architectures, GCC 4.9 or later is required to build the GNU C
1936 Library. On powerpc64le, GCC 6.2 or later is required.
1938 Older GCC versions and non-GNU compilers are still supported when
1939 compiling programs that use the GNU C Library. (We do not know exactly
1940 how old, and some GNU extensions to C may be _de facto_ required. If you
1941 are interested in helping us make this statement less vague, please
1942 contact libc-alpha@sourceware.org.)
1944 Security related changes:
1946 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1947 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1949 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1950 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1952 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1953 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1956 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1957 fixed (CVE-2017-12133).
1959 The following bugs are resolved with this release:
1961 [984] network: Respond to changed resolv.conf in gethostbyname
1962 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1963 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1965 [12189] libc: __stack_chk_fail should not attempt a backtrace
1967 [14096] time: Race condition on timezone/tst-timezone.out
1968 [14172] localedata: az_IR: new locale
1969 [14995] build: glibc fails to build if gold is the default linker, even if
1971 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1972 [16637] network: inet_pton function is accepting IPv6 with bad format
1973 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1974 x86 and other generic code
1975 [16875] localedata: ko_KR: fix lang_name
1976 [17225] localedata: ar_SY: localized month names for May and June are
1978 [17297] localedata: da_DK: wrong date_fmt string
1979 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1980 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1981 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1982 [19066] localedata: ar_SA abbreviated day and month names are in English
1983 [19569] network: resolv: Support an arbitrary number of search domains
1984 [19570] network: Implement random DNS server selection in the stub
1986 [19838] locale: localedef fails on PA-RISC
1987 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1988 order of 0D36 and 0D37
1989 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1991 [20098] libc: FAIL: debug/backtrace-tst on hppa
1992 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1994 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1996 [20313] localedata: Update locale data to Unicode 9.0
1997 [20424] manual: Document how to provide a malloc replacement
1998 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
2000 [20686] locale: Add el_GR@euro to SUPPORTED.
2001 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2002 failures consistently
2003 [21015] dynamic-link: Document and fix --enable-bind-now
2004 [21016] nptl: pthread_cond support is broken on hppa
2005 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2006 frame-pointer on i386
2007 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2009 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2010 [21088] libc: Build fails with --enable-static-nss
2011 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2012 generic c code is used
2013 [21109] libc: Tunables broken on big-endian
2014 [21112] math: powf has large ulp errors with base close to 1 and exponent
2016 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2018 [21120] malloc: glibc malloc is incompatible with GCC 7
2019 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2021 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2022 (-0.0) when linking with -lieee
2023 [21171] math: log10, log2 and lgamma return incorrect results
2024 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2025 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2026 [21207] localedata: ce_RU: update weekdays from CLDR
2027 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2028 [21217] localedata: Update months from CLDR-31
2029 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2030 [21243] libc: support_delete_temp_file should issue warning for failed
2032 [21244] libc: support resolv_test_start() socket fd close should be
2034 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2035 new posix_spawn implementation
2036 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2037 leads to lower CPU frequency
2038 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2039 [21261] libc: [sparc64] bits/setjmp.h namespace
2040 [21267] network: [mips] bits/socket.h IOC* namespace
2041 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2042 [21270] libc: mmap64 silently truncates large offset values
2043 [21275] libc: posix_spawn always crashes on ia64 now
2044 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2045 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2046 [21289] libc: Incorrect declaration for 32-bit platforms with
2047 _FILE_OFFSET_BITS=64 causes build error
2048 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2049 not support gethostbyname4_r
2050 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2052 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2054 [21340] libc: Support POSIX_SPAWN_SETSID
2055 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2056 [21359] network: ns_name_pack needs additional byte in destination buffer
2057 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2058 against fragmentation attacks (CVE-2017-12132)
2059 [21369] network: resolv: Remove EDNS fallback
2060 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2062 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2063 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2064 [21393] stdio: Missing dup3 error check in freopen, freopen64
2065 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2066 [21399] localedata: Bad description for U00EC in
2067 localedata/charmaps/CP1254
2068 [21411] malloc: realloc documentation error
2069 [21426] network: sys/socket.h uio.h namespace
2070 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2071 [21445] libc: signal.h bsd_signal namespace
2072 [21455] network: Network headers stdint.h namespace
2073 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2075 [21475] network: resolv: Overlong search path is truncated mid-label
2076 [21511] libc: sigstack namespace
2077 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2078 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2079 bits/syscall.h: No such file or directory
2080 [21517] libc: struct sigaltstack namespace
2081 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2082 [21533] localedata: Update locale data to Unicode 10.0
2084 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2085 junk at end of line, first unrecognized character is `@'
2086 [21538] libc: SIG_HOLD missing for XPG4
2087 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2088 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2089 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2090 [21543] libc: sigevent namespace
2091 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2092 size for general purpose registers in mcontext_t structure
2093 [21550] libc: sigwait namespace
2094 [21552] libc: XPG4 bsd_signal namespace
2095 [21554] libc: sigpause namespace
2096 [21560] libc: sys/wait.h signal.h namespace
2097 [21561] libc: waitid namespace
2098 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2099 '/usr/include/stdlib.h': Permission denied
2100 [21575] libc: sys/wait.h missing struct rusage definition
2101 [21584] libc: sigaltstack etc namespace
2102 [21597] libc: siginterrupt namespace
2103 [21607] math: hppa: FAIL: math/test-tgmath
2104 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2106 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2107 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2108 stack and heap (CVE-2017-1000366)
2109 [21625] libc: wait3 namespace
2110 [21654] nss: Incorrect pointer alignment in NSS group merge result
2112 [21657] network: Parse interface zone id for node-local multicast
2113 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2115 [21666] libc: .symver is used on common symbol
2116 [21668] network: resolv: res_init cross-thread broadcast introduces race
2118 [21687] math: tgmath.h totalorder, totalordermag return type
2119 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2121 [21696] libc: Incorrect assumption of of __cpu_mask in
2122 posix/sched_cpucount.c
2123 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2124 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2126 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2127 leading to relocation crash
2128 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2129 `resolv_conf_matches (resp, conf)' failed.
2130 [21710] localedata: Added Samoan language locale for Samoa
2131 [21711] localedata: Pashto yesstr/nostr locale are missing
2132 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2133 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2134 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2135 [21723] localedata: yesstr/nostr missing for Chinese language locale
2136 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2138 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2140 [21728] localedata: New Locale for Tongan language
2141 [21729] localedata: incorrect LC_NAME fields for hi_IN
2142 [21733] localedata: yesstr and nostr are missing for zh_HK
2143 [21734] localedata: Missing yesstr and nostr are for kw_GB
2144 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2145 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2146 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2147 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2149 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2151 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2153 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2154 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2155 [21759] localedata: missing yesstr and nostr for Tigrinya
2156 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2157 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2158 [21767] localedata: Missing Bislama locales
2159 [21768] localedata: Missing yesstr and nostr for aa_ET
2160 [21770] localedata: Missing Field in li_NL
2161 [21778] nptl: Robust mutex may deadlock
2162 [21779] libc: MicroBlaze segfaults when loading libpthread
2163 [21783] localedata: Fix int_select international_call_prefixes
2164 [21784] localedata: Inconsistency in country_isbn
2165 [21788] localedata: Missing Country Postal Abbreviations
2166 [21794] localedata: Added-country_isbn-for-Italy
2167 [21795] localedata: Add/Fix country_isbn for France
2168 [21796] localedata: Added country_isbn for Republic of Korea
2169 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2170 [21799] localedata: Added int_select international_call_prefixes
2171 [21801] localedata: Added int_select international_call_prefixes
2172 [21804] nptl: Double semicolon in thread-shared-types.h
2173 [21807] localedata: LC_ADDRESS fix for pap_CW
2174 [21808] localedata: Fix LC_ADDRESS for pap_AW
2175 [21821] localedata: Added country_name in mai_IN
2176 [21822] localedata: Fix LC_TIME for mai_IN
2177 [21823] localedata: missing yesstr, nostr for sa_IN
2178 [21825] localedata: Fix name_mrs for mag_IN
2179 [21828] localedata: 2.26 changelog should mention user visible changes
2181 [21835] localedata: Added Maithili language locale for Nepal
2182 [21838] localedata: Removed redundant data for the_NP
2183 [21839] localedata: Fix LC_MONETARY for ta_LK
2184 [21844] localedata: Fix Latin characters and Months Sequence.
2185 [21848] localedata: Fix mai_NP Title Name
2190 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2191 24731-2:2010, is supported to enable declarations of functions from that
2192 TR. Note that not all functions from that TR are supported by the GNU C
2195 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2196 18661-1:2014, is supported to enable declarations of functions and macros
2197 from that TS. Note that not all features from that TS are supported by
2200 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2201 18661-4:2015, is supported to enable declarations of functions and macros
2202 from that TS. Note that most features from that TS are not supported by
2205 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2206 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2207 Since the GNU C Library defaults to a much newer revision of POSIX, this
2208 will only affect programs that specifically request an old conformance
2209 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2210 see a change in the visible declarations, but a program compiled with
2211 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2214 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2215 defined by all multithreaded code, but glibc has not required this for
2218 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2219 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2220 will only be available from <sys/sysmacros.h>.
2222 These macros are not part of POSIX nor XSI, and their names frequently
2223 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2224 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2225 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2228 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2229 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2230 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2232 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2233 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2234 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2235 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2236 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2237 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2238 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2239 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2240 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2241 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2242 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2245 * New <math.h> features are added from TS 18661-1:2014:
2247 - Signaling NaN macros: SNANF, SNAN, SNANL.
2249 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2250 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2251 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2253 - llogb functions: the llogb, llogbf and llogbl functions, and the
2254 FP_LLOGB0 and FP_LLOGBNAN macros.
2256 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2259 - Comparison macros: iseqsig.
2261 - Classification macros: iscanonical, issubnormal, iszero.
2263 - Total order functions: totalorder, totalorderf, totalorderl,
2264 totalordermag, totalordermagf, totalordermagl.
2266 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2268 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2269 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2271 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2272 are added to libc. They convert a floating-point number into string.
2274 * Most of glibc can now be built with the stack smashing protector enabled.
2275 It is recommended to build glibc with --enable-stack-protector=strong.
2276 Implemented by Nick Alcock (Oracle).
2278 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2279 intended to be used instead of memset() to erase sensitive data after use;
2280 the compiler will not optimize out calls to explicit_bzero even if they
2281 are "unnecessary" (in the sense that no _correct_ program can observe the
2282 effects of the memory clear).
2284 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2285 to float instead of double. This does not affect the ABI of any libraries
2286 that are part of the GNU C Library, but may affect the ABI of other
2287 libraries that use this type in their interfaces.
2289 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2290 float_t and double_t types are now defined to long double instead of float
2291 and double. These options are not the default, and this does not affect
2292 the ABI of any libraries that are part of the GNU C Library, but it may
2293 affect the ABI of other libraries that use this type in their interfaces,
2294 if they are compiled or used with those options.
2296 * The getentropy and getrandom functions, and the <sys/random.h> header file
2299 * The buffer size for byte-oriented stdio streams is now limited to 8192
2300 bytes by default. Previously, on Linux, the default buffer size on most
2301 file systems was 4096 bytes (and thus remains unchanged), except on
2302 network file systems, where the buffer size was unpredictable and could be
2303 as large as several megabytes.
2305 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2306 for the Linux quota interface which predates kernel version 2.4.22 has
2309 * The malloc_get_state and malloc_set_state functions have been removed.
2310 Already-existing binaries that dynamically link to these functions will
2311 get a hidden implementation in which malloc_get_state is a stub. As far
2312 as we know, these functions are used only by GNU Emacs and this change
2313 will not adversely affect already-built Emacs executables. Any undumped
2314 Emacs executables, which normally exist only during an Emacs build, should
2315 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2317 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2318 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2319 âno-ip6-dotintâ had already been the default, and support for the
2320 âip6-dotintâ option was removed from the Internet in 2006.
2322 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2323 flag from <resolv.h> have been removed. The option relied on a
2324 backwards-incompatible DNS extension which was never deployed on the
2327 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2328 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2329 They were already unimplemented.
2331 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2332 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2333 removed again from the IETF name lookup interface specification in RFC
2334 2553. Applications should use getaddrinfo instead.
2336 * DNSSEC-related declarations and definitions have been removed from the
2337 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2338 decode the data part of DNSSEC record types. Previous versions of glibc
2339 only implemented minimal support for the previous version of DNSSEC, which
2340 is incompatible with the currently deployed version.
2342 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2343 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2344 <arpa/nameser.h> header file because the distinction between RR types and
2345 meta-RR types is not officially standardized, subject to revision, and
2346 thus not suitable for encoding in a macro.
2348 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2349 and rhook members of the res_state type in <resolv.h> have been removed.
2350 The glibc stub resolver did not support these hooks, but the header file
2351 did not reflect that.
2353 * For multi-arch support it is recommended to use a GCC which has
2354 been built with support for GNU indirect functions. This ensures
2355 that correct debugging information is generated for functions
2356 selected by IFUNC resolvers. This support can either be enabled by
2357 configuring GCC with '--enable-gnu-indirect-function', or by
2358 enabling it by default by setting 'default_gnu_indirect_function'
2359 variable for a particular architecture in the GCC source file
2362 * GDB pretty printers have been added for mutex and condition variable
2363 structures in POSIX Threads. When installed and loaded in gdb these pretty
2364 printers show various pthread variables in human-readable form when read
2365 using the 'print' or 'display' commands in gdb.
2367 * Tunables feature added to allow tweaking of the runtime for an application
2368 program. This feature can be enabled with the '--enable-tunables' configure
2369 flag. The GNU C Library manual has details on usage and README.tunables has
2370 instructions on adding new tunables to the library.
2372 * A new version of condition variables functions have been implemented in
2373 the NPTL implementation of POSIX Threads to provide stronger ordering
2376 * A new version of pthread_rwlock functions have been implemented to use a more
2377 scalable algorithm primarily through not using a critical section anymore to
2380 Security related changes:
2382 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2383 have been created with makecontext could fail to terminate due to a
2384 missing .cantunwind annotation. This has been observed to lead to a hang
2385 (denial of service) in some Go applications compiled with gccgo. Reported
2386 by Andreas Schwab. (CVE-2016-6323)
2388 * The DNS stub resolver functions would crash due to a NULL pointer
2389 dereference when processing a query with a valid DNS question type which
2390 was used internally in the implementation. The stub resolver now uses a
2391 question type which is outside the range of valid question type values.
2394 The following bugs are resolved with this release:
2396 [4099] stdio: Overly agressive caching by stream i/o functions.
2397 [7065] build: Support building glibc with -fstack-protector or -fstack-
2399 [9842] localedata: en_CA: incorrect date format
2400 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2401 before it started waiting
2402 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2403 [15765] nptl: sem_open is wrongly a cancellation point
2404 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2405 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2407 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2408 library linked with pthread
2409 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2410 "FIXME: Ingo" issue)
2411 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2412 [17252] libc: getrandom and getentropy syscall
2413 [17730] malloc: thread-local storage is sometimes improperly free()'d
2414 after being __libc_memalign()'d
2415 [18241] stdio: failed fseek on memstream does not set errno and can fail
2417 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2419 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2420 PTHREAD_PRIO_INHERIT mutex on ARM
2421 [18784] network: res_query and related function crash for special record
2422 type queries (CVE-2015-5180)
2423 [19380] math: strtod does not raise "inexact"
2424 [19387] string: Integer overflow in memchr
2425 [19390] string: Integer overflow in strncat
2426 [19398] build: linknamespace tests fail with massively parallel build
2427 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2429 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2430 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2431 [19514] libc: [PATCH] Fix spelling errors in spelling
2432 "implement"/"implementation" in several places
2433 [19582] network: Deprecate RES_USE_INET6
2434 [19673] manual: clog10 docs appear to be erroneous
2435 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2436 causes a segmentation fault
2437 [19826] libc: invalid pointer returned from __tls_get_addr with static
2439 [20016] network: resolv: Remove hooks support from the API
2440 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2442 [20033] math: [x86_64] vectorized math function don't call the __finite
2444 [20116] nptl: use after free in pthread_create
2445 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2446 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2448 [20311] nptl: please install proc_service.h
2449 [20366] libc: Compilation errors in installed headers in strict-compliance
2451 [20370] malloc: malloc: Arena free list management is still racy
2452 (incorrect fix in bug 19243)
2453 [20386] libc: assert (X = 0) does not result in GCC warning
2454 [20432] malloc: malloc: Minimize interface required for interposition
2455 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2456 in _Unwind_Backtrace (CVE-2016-6323)
2457 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2458 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2460 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2461 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2462 [20477] network: resolv: incorrect double-checked locking related to
2464 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2466 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2468 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2469 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2470 cause transition penalty
2471 [20517] math: sparcv9 missing fdiml compat symbol
2472 [20524] manual: strverscmp is inconsistent
2473 [20525] libc: <sys/quota.h> should be based on kernel headers
2474 [20539] math: GCC 7 -static -lm fails to link at -O3
2475 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2477 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2479 [20591] network: Remove obsolete DNSSEC support
2480 [20592] network: DNS resource record type classification macros in
2481 <arpa/nameser.h> are incorrect
2482 [20593] network: Update DNS RR type definitions
2483 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2484 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2486 [20629] network: libresolv: Remove support for bitstring labels
2488 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2489 assertion: "maxidx >= 2"
2490 [20660] math: [arm] Use VSQRT
2491 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2492 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2493 [20689] libc: Test for FMA should also check for AVX.
2494 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2495 [20715] math: iszero macro breaks existing code
2496 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2497 [20728] libc: powerpc: Missing TOC stub in clone
2498 [20729] build: glibc-2.24 fails to build for i486 with -Os
2499 [20750] build: Build fails with default PIE enabled gcc-6.x
2500 [20768] math: [alpha] sqrt fegetenv namespace
2501 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2503 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2504 __FLT_EVAL_METHOD__ is 2
2505 [20790] network: rpcgen buffer overrun in get_prog_declaration
2506 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2507 [20829] libc: crypt snprintf namespace
2508 [20847] libc: tst-vfork3 failure
2509 [20855] math: Default bits/mathdef.h has inappropriate float_t
2510 [20859] math: [sh4] FP_ILOGB0 invalid
2511 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2512 U+20AC), not same as GBK
2513 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2514 [20916] math: pow handling of sNaN arguments
2515 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2516 [20919] math: Bad pow (qNaN, 0) result with -lieee
2517 [20940] math: hypot sNaN handling
2518 [20947] math: fmax, fmin sNaN handling
2519 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2520 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2522 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2523 [20973] nptl: robust mutexes: Lost wake-ups
2524 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2525 [20978] nis: strlen on null pointer in nss_nisplus
2526 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2528 [21014] string: i686 memchr overflows internal pointer check
2529 [21019] libc: [mips] n32 lseek incorrect on overflow
2530 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2531 [21026] libc: [MIPS] readahead syscall is broken on n64
2532 [21028] math: Fallback fesetexceptflag should always succeed
2533 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2534 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2536 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2537 [21061] librt: [microblaze] librt lost clock_* exports
2538 [21073] libc: tunables: insecure environment variables passed to
2539 subprocesses with AT_SECURE
2540 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2544 * The minimum Linux kernel version that this version of the GNU C Library
2545 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2546 kernel version 2.6.32 or later suffices (on architectures that already
2547 required kernel versions more recent than 3.2, those requirements remain
2548 unchanged). Linux 3.2 or later kernel headers are required on all
2551 * The pap_AN locale has been deleted. This has been deprecated for a long
2552 time. It has been replaced by pap_AW & pap_CW, both of which have long
2553 been included in previous releases.
2555 * The readdir_r and readdir64_r functions have been deprecated. It is
2556 recommended to use readdir and readdir64 instead.
2558 * The type âunion waitâ has been removed. It was deprecated in the early
2559 1990s and never part of POSIX. Application code should use the int type
2560 instead of âunion waitâ.
2562 * A new NSS action is added to facilitate large distributed system
2563 administration. The action, MERGE, allows remote user stores like LDAP
2564 to be merged into local user stores like /etc/groups in order to provide
2565 easy to use, updated, and managed sets of merged credentials. The new
2566 action can be used by configuring it in /etc/nsswitch.conf:
2567 group: files [SUCCESS=merge] nis
2568 Implemented by Stephen Gallagher (Red Hat).
2570 * The deprecated __malloc_initialize_hook variable has been removed from the
2573 * The long unused localedef --old-style option has been removed. It hasn't
2574 done anything in over 16 years. Scripts using this option can safely
2577 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2578 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2579 return the next representable value in the direction of positive infinity
2580 and the nextdown functions return the next representable value in the
2581 direction of negative infinity. These are currently enabled as GNU
2584 Security related changes:
2586 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2587 could result in a stack overflow when getnetbyname was called with an
2588 overly long name. (CVE-2016-3075)
2590 * Previously, getaddrinfo copied large amounts of address data to the stack,
2591 even after the fix for CVE-2013-4458 has been applied, potentially
2592 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2593 instead. Reported by Michael Petlan. (CVE-2016-3706)
2595 * The glob function suffered from a stack-based buffer overflow when it was
2596 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2597 Reported by Alexander Cherepanov. (CVE-2016-1234)
2599 * The Sun RPC UDP client could exhaust all available stack space when
2600 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2601 alloca plugin for GCC. (CVE-2016-4429)
2603 * The IPv6 name server management code in libresolv could result in a memory
2604 leak for each thread which is created, performs a failing naming lookup,
2605 and exits. Over time, this could result in a denial of service due to
2606 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2608 The following bugs are resolved with this release:
2610 [1170] localedata: ne_NP: update Nepali locale definition file
2611 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2613 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2614 [6796] math: fdim() does not set errno on overflow
2615 [10354] libc: posix_spawn should use vfork() in more cases than presently
2616 [11213] localedata: localedata: add copyright disclaimer to locale files
2617 [12143] localedata: chr_US: new Cherokee locale
2618 [12450] localedata: sgs_LT: new locale
2619 [12676] localedata: ln_CD: new locale
2620 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2622 [13304] math: fma, fmaf, fmal produce wrong results
2623 [14259] build: --localedir arg to configure is ignored
2624 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2625 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2626 [14934] localedata: es_CL: wrong first weekday chilean locale
2627 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2629 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2631 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2632 [15368] nptl: raise() is not async-signal-safe
2633 [15479] math: ceil, floor, round and trunc raise inexact exception
2634 [15578] localedata: kk_KZ: various updates
2635 [16003] localedata: pap_AN: punt old locale
2636 [16137] localedata: iw_IL: punt old locale
2637 [16190] localedata: eo: new esperanto locale
2638 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2639 [16742] malloc: race condition: pthread_atfork() called before first
2640 malloc() results in unexpected locking behaviour/deadlocks
2641 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2643 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2644 [17565] localedata: pt_PT: wrong (work-)week start
2645 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2646 [17950] build: Build fails with -msse
2647 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2648 [18433] libc: posix_spawn does not return correctly upon failure to
2650 [18453] localedata: charmaps/IBM875: incorrect codes
2651 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2653 [18896] localedata: he_IL: improvements for currency
2654 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2655 Romanian locale data
2656 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2658 [19056] libc: Deprecate readdir_r
2659 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2661 [19198] localedata: nl_NL: small improvements for Dutch locales
2662 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2663 nameservers (CVE-2016-5417)
2664 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2666 [19400] locale: Language missing in "iso-639.def", trivial fix in
2668 [19431] malloc: Deadlock between fflush, getdelim, and fork
2669 [19505] libc: Incorrect file descriptor validity checks in
2670 posix_spawn_file_actions_add{open,close,dup2}
2671 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2672 when using RTLD_NEXT
2673 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2674 `intl/{gettextP,loadinfo}.h'
2675 [19534] libc: execle, execlp may use malloc
2676 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2677 [19573] network: res_nclose and __res_maybe_init disagree about name
2678 server initialization, breaking Hesiod
2679 [19575] localedata: Status of GB18030 tables
2680 [19581] localedata: sr_* date_fmt string contains additional newline
2681 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2683 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2684 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2685 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2686 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2688 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2690 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2692 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2693 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2694 [19633] locale: strfmon_l applies global locale to number formatting
2695 [19642] network: Memory leak in getnameinfo
2696 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2697 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2699 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2700 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2702 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2703 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2705 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2707 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2709 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2710 pointers and lengths in error-case.
2711 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2712 report errors on UTF-16 surrogates values.
2713 [19755] nscd: nscd assertion failure in gc
2714 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2715 [19759] libc: mempcpy shouldn't be inlined
2716 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2717 [19765] libc: s390 needs an optimized mempcpy
2718 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2719 NAME_MAX limit assumption (CVE-2016-1234)
2720 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2721 [19787] network: Missing and incorrect truncation checks in getnameinfo
2722 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2724 [19791] network: Assertion failure in res_query.c with un-connectable name
2726 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2727 [19822] math: libm.so install clobbers old version
2728 [19825] network: resolv: send_vc can return uninitialized data in second
2729 response to getaddrinfo
2730 [19830] network: nss_dns: should check RDATA length against buffer length
2731 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2732 confronted with A/AAAA records of invalid size
2733 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2734 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2735 [19853] stdio: Printing IBM long double in decimal with high precision is
2737 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2738 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2739 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2741 [19865] network: Assertion failure or memory leak in
2742 _nss_dns_getcanonname_r
2743 [19868] network: nss_dns: netent code does not skip over non-PTR records
2744 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2746 [19881] string: Improve x86-64 memset
2747 [19907] string: Incorrect memcpy tests
2748 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2750 [19925] libc: termios.h XCASE namespace
2751 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2752 [19929] libc: limits.h NL_NMAX namespace
2753 [19931] stdio: Memory leak in vfprintf
2754 [19957] libc: clone(CLONE_VM) access invalid parent memory
2755 [19963] localedata: en_IL: New locale
2756 [19989] stdio: stdio.h cuserid namespace
2757 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2759 [19996] locale: langinfo.h nl_langinfo_l namespace
2760 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2761 [20010] network: getaddrinfo: Stack overflow in hostent translation
2763 [20012] stdio: libio: fmemopen append mode failure
2764 [20014] stdio: stdio.h namespace for pre-threads POSIX
2765 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2766 [20023] libc: fcntl.h timespec namespace
2767 [20024] math: [x86_64] vectorized sincos trashes the stack
2768 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2769 [20041] time: sys/time.h timespec namespace
2770 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2771 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2772 [20051] libc: ttyslot in wrong header under wrong conditions
2773 [20054] libc: gethostname not declared for XPG4
2774 [20055] libc: termios.h missing tcgetsid for XPG4
2775 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2777 [20073] libc: sys/stat.h fchmod namespace
2778 [20074] libc: stdlib.h rand_r namespace
2779 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2780 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2782 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2783 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2785 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2786 [20119] libc: Wrong mask for processors level type from CPUID
2787 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2788 AS not supporting AVX512
2789 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2791 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2792 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2794 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2795 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2796 [20178] libc: posix_spawn{p} should not call exit
2797 [20191] stdio: libio: vtables hardening
2798 [20195] string: FMA4 detection requires CPUID execution with register
2800 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2801 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2803 [20212] math: acos (sNaN) returns sNaN
2804 [20213] math: asin (sNaN) returns sNaN
2805 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2806 [20218] math: [i386] asinhl (sNaN) returns sNaN
2807 [20219] math: [i386] atanhl (sNaN) returns sNaN
2808 [20222] stdio: fopencookie: Mangle function pointers
2809 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2810 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2811 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2813 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2814 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2815 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2816 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2817 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2818 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2819 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2820 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2821 [20240] math: modf (sNaN) returns sNaN
2822 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2823 [20250] math: frexp (sNaN) returns sNaN
2824 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2825 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2827 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2828 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2829 subscript is below array bounds [-Werror=array-bounds]
2830 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2831 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2833 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2834 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2836 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2837 "invalid" exceptions
2838 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2839 [20316] localedata: id_ID: Februari instead of Pebruari
2840 [20327] string: POWER8 strcasecmp returns incorrect result
2841 [20347] math: Failure: Test: j0_downward (0xap+0)
2842 [20348] libc: FAIL: misc/tst-preadvwritev64
2843 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2844 [20350] libc: There is no test for p{read,write}64
2845 [20357] math: Incorrect cos result for 1.5174239687223976
2846 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2850 * Unicode 8.0.0 Support: Character encoding, character type info, and
2851 transliteration tables are all updated to Unicode 8.0.0, using new
2852 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2853 These updates cause user visible changes, such as the fixes for bugs
2854 89, 16061, and 18568.
2856 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2857 kernel-internal CPU set size. This means that requests that change the
2858 CPU affinity which failed before (for example, an all-ones CPU mask) will
2859 now succeed. Applications that need to determine the effective CPU
2860 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2861 setting it because the kernel can adjust it (and the previous size check
2862 would not detect this in the majority of cases).
2864 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2865 the following new symbols are used: fts64_children, fts64_close,
2866 fts64_open, fts64_read and fts64_set.
2868 * getaddrinfo now detects certain invalid responses on an internal netlink
2869 socket. If such responses are received, an affected process will
2870 terminate with an error message of "Unexpected error <number> on netlink
2871 descriptor <number>" or "Unexpected netlink response of size <number> on
2872 descriptor <number>". The most likely cause for these errors is a
2873 multi-threaded application which erroneously closes and reuses the netlink
2874 file descriptor while it is used by getaddrinfo.
2876 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2877 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2878 unnecessary serialization of memory allocation requests across threads.
2879 The defect is now corrected. Users should see a substantial increase in
2880 the concurent throughput of allocation requests for applications which
2881 trigger this bug. Affected applications typically create and
2882 destroy threads frequently. (Bug 19048 was reported and analyzed by
2885 * There is now a --disable-timezone-tools configure option for disabling the
2886 building and installing of the timezone related utilities (zic, zdump, and
2887 tzselect). This is useful for people who build the timezone data and code
2888 independent of the GNU C Library.
2890 * The obsolete header <regexp.h> has been removed. Programs that require
2891 this header must be updated to use <regex.h> instead.
2893 * The obsolete functions bdflush, create_module, get_kernel_syms,
2894 query_module and uselib are no longer available to newly linked binaries;
2895 the header <sys/kdaemon.h> has been removed. These functions and header
2896 were specific to systems using the Linux kernel and could not usefully be
2897 used with the GNU C Library on systems with version 2.6 or later of the
2900 * Optimized string, wcsmbs and memory functions for IBM z13.
2901 Implemented by Stefan Liebler.
2903 * Newly linked programs that define a variable called signgam will no longer
2904 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2905 require signgam to be set by those functions must ensure that they use the
2906 variable provided by the GNU C Library and declared in <math.h>, without
2907 defining their own copy.
2909 * The minimum GCC version that can be used to build this version of the GNU
2910 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2911 still be used to compile programs using the GNU C Library.
2913 Security related changes:
2915 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2916 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2918 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2919 the pointer guard feature. It is always enabled. Previously,
2920 LD_POINTER_GUARD could be used to disable security hardening in binaries
2921 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2924 * An integer overflow in hcreate and hcreate_r could lead to an
2925 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2927 * The catopen function no longer has unbounded stack usage. Reported by
2928 Max. (CVE-2015-8779)
2930 * The nan, nanf and nanl functions no longer have unbounded stack usage
2931 depending on the length of the string passed as an argument to the
2932 functions. Reported by Joseph Myers. (CVE-2014-9761)
2934 * A stack-based buffer overflow was found in libresolv when invoked from
2935 libnss_dns, allowing specially crafted DNS responses to seize control
2936 of execution flow in the DNS client. The buffer overflow occurs in
2937 the functions send_dg (send datagram) and send_vc (send TCP) for the
2938 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2939 family. The use of AF_UNSPEC triggers the low-level resolver code to
2940 send out two parallel queries for A and AAAA. A mismanagement of the
2941 buffers used for those queries could result in the response of a query
2942 writing beyond the alloca allocated buffer created by
2943 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2944 the overflow. Thanks to the Google Security Team and Red Hat for
2945 reporting the security impact of this issue, and Robert Holiday of
2946 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2948 The following bugs are resolved with this release:
2950 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2951 [887] math: Math library function "logb" and "nextafter" inconsistent
2952 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2953 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2954 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2955 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2957 [4404] localedata: German translation of "Alarm clock" is misleading
2958 [6799] math: nextafter() and nexttoward() doen't set errno on
2959 overflow/underflow errors
2960 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2962 [10432] nis: _nss_nis_setnetgrent assertion failure
2963 [11460] libc: fts has no LFS support
2964 [12926] network: getaddrinfo()/make_request() may spin forever
2965 [13065] nptl: Race condition in pthread barriers
2966 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2967 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2969 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2970 [14912] libc: Rename non-installed bits/*.h headers
2971 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2972 [15367] math: Let gcc use __builtin_isinf
2973 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2974 [15421] math: lgamma wrongly sets signgam for ISO C
2975 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2976 FE_INVALID with argument out of range
2977 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2979 [15786] dynamic-link: ifunc resolver functions can smash function
2981 [15918] math: Unnecessary check for equality in hypotf()
2982 [16061] localedata: Review / update transliteration data
2983 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2985 [16141] time: strptime %z offset restriction
2986 [16171] math: drem should be alias of remainder
2987 [16296] math: fegetround is pure?
2988 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2989 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2991 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2992 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2994 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2995 "Exception "Inexact" set" on ppc32
2996 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2997 [16517] math: Missing underflow exception from tanf/tan/tanl
2998 [16519] math: Missing underflow exception from sinhf
2999 [16520] math: Missing underflow exception from tanhf
3000 [16521] math: Missing underflow exception from exp2
3001 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3003 [16734] stdio: fopen calls mmap to allocate its buffer
3004 [16961] math: nan function incorrect handling of bad sequences
3005 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3006 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3007 [16985] locale: localedef: confusing error message when opening output
3009 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3010 [17197] locale: Redundant shift character in iconv conversion output at
3012 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3013 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3014 [17250] dynamic-link: static linking breaks nss loading
3015 (getaddrinfo/getpwnam/etc...)
3016 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3018 [17441] math: isnan() should use __builtin_isnan() in GCC
3019 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3020 (related to lock elision)
3021 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3022 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3023 [17887] time: strptime should be able to parse "+01:00" style timezones
3024 [17905] libc: catopen() Multiple unbounded stack allocations
3026 [18084] libc: backtrace (..., 0) dumps core on x86
3027 [18086] libc: nice() sets errno to 0 on success
3028 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3029 is too large (CVE-2015-8778)
3030 [18251] dynamic-link: SONAME missing when audit modules provides path
3031 [18265] libc: add attributes for wchar string and memory functions
3032 [18370] math: csqrt missing underflows
3033 [18421] libc: [hppa] read-only segment has dynamic relocations
3034 [18472] libc: Obsolete syscall wrappers should be compat symbols
3035 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3036 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3037 [18525] localedata: Remove locale timezone information
3038 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3039 [18568] localedata: Update locale data to Unicode 8.0
3040 [18589] locale: sort-test.sh fails at random
3041 [18595] math: ctan, ctanh missing underflows
3042 [18604] libc: assert macro-expands its argument
3043 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3044 contains a vector instruction exception.
3045 [18611] math: j1, jn missing errno setting on underflow
3046 [18618] localedata: sync Chechen locale definitions with other *_RU
3048 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3049 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3050 [18665] network: In send_dg, the recvfrom function is NOT always using the
3051 buffer size of a newly created buffer (CVE-2015-7547)
3052 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3054 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3056 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3057 [18699] math: tilegx cproj() for various complex infinities does not yield
3059 [18724] libc: Harden put*ent functions against data injection
3060 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3061 [18755] build: build errors with -DNDEBUG
3062 [18757] stdio: fmemopen fails to set errno on failure
3063 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3065 [18781] libc: openat64 lacks O_LARGEFILE
3066 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3067 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3068 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3069 [18790] math: [ldbl-128ibm] tanhl inaccurate
3070 [18795] libc: stpncpy fortification misses buffer lengths that are
3071 statically too large
3072 [18796] build: build fails for --disable-mathvec
3073 [18803] math: hypot missing underflows
3074 [18820] stdio: fmemopen may leak memory on failure
3075 [18823] math: csqrt spurious underflows
3076 [18824] math: fma spurious underflows
3077 [18825] math: pow missing underflows
3078 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3079 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3080 [18870] build: sem_open.c fails to compile with missing symbol
3082 [18872] stdio: Fix memory leak in printf_positional
3083 [18873] libc: posix_fallocate overflow check ineffective
3084 [18875] math: Excess precision leads incorrect libm
3085 [18877] libc: arm: mmap offset regression
3086 [18887] libc: memory corruption when using getmntent on blank lines
3087 [18918] localedata: hu_HU: change time to HH:MM:SS format
3088 [18921] libc: Regression: extraneous stat() and fstat() performed by
3090 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3091 binaries (CVE-2015-8777)
3092 [18951] math: tgamma missing underflows
3093 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3095 [18953] localedata: lt_LT: change currency symbol to the euro
3096 [18956] math: powf inaccuracy
3097 [18961] math: [i386] exp missing underflows
3098 [18966] math: [i386] exp10 missing underflows
3099 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3100 [18969] build: multiple string test failures due to missing locale
3102 [18970] libc: Reference of pthread_setcancelstate in libc.a
3103 [18977] math: float / long double Bessel functions not in XSI POSIX
3104 [18980] math: i386 libm functions return with excess range and precision
3105 [18981] math: i386 scalb*, ldexp return with excess range and precision
3106 [18982] stdio: va_list and vprintf
3107 [18985] time: Passing out of range data to strftime() causes a segfault
3109 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3110 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3111 [19012] locale: iconv_open leaks memory on error path
3112 [19016] math: clog, clog10 inaccuracy
3113 [19018] nptl: Mangle function pointers in tls_dtor_list
3114 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3115 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3116 [19048] malloc: malloc: arena free list can become cyclic, increasing
3118 [19049] math: [powerpc] erfc incorrect zero sign
3119 [19050] math: [powerpc] log* incorrect zero sign
3120 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3121 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3122 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3123 [19074] network: Data race in _res_hconf_reorder_addrs
3124 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3125 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3126 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3128 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3130 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3131 [19086] manual: posix_fallocate64 documented argument order is wrong.
3132 [19088] math: lround, llround missing exceptions close to overflow
3134 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3135 [19095] math: dbl-64 lrint incorrect for 64-bit long
3136 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3137 [19124] dynamic-link: ld.so failed to build with older assmebler
3138 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3139 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3140 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3141 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3142 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3143 pthread_setaffinity_np
3144 [19156] math: [ldbl-128] j0l spurious underflows
3145 [19164] nptl: tst-getcpu fails with many possible CPUs
3146 [19168] math: math/test-ildoubl and math/test-ldouble failure
3147 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3148 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3150 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3151 (FE_NOMASK_ENV) do not clear SSE exceptions
3152 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3153 _int_new_arena/reused_arena
3154 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3155 [19201] math: dbl-64 remainder incorrect sign of zero result
3156 [19205] math: bits/math-finite.h conditions do not match math.h and
3158 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3159 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3160 for C99-based standards
3161 [19212] libc: features.h not -Wundef clean
3162 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3164 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3165 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3166 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3168 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3169 "inexact" exceptions
3170 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3172 [19242] libc: strtol incorrect in Turkish locales
3173 [19243] malloc: reused_arena can pick an arena on the free list, leading
3174 to an assertion failure and reference count corruption
3175 [19253] time: tzset() ineffective when temporary TZ did not include DST
3177 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3178 [19270] math: [hppa] Shared libm missing __isnanl
3179 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3180 MAP_HUGETLB and MAP_STACK defines
3181 [19313] nptl: Wrong __cpu_mask for x32
3182 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3183 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3184 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3185 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3186 [19363] time: x32: times() return value wrongly truncates/sign extends
3188 [19367] dynamic-link: Improve branch prediction on Silvermont
3189 [19369] network: Default domain name not reset by res_ninit when "search"
3190 / "domain" entry is removed from resolv.conf
3191 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3193 [19385] localedata: bg_BG: time separator should be colon, not comma
3194 [19408] libc: linux personality syscall wrapper may erroneously return an
3195 error on 32-bit architectures
3196 [19415] libc: dladdr returns wrong names on hppa
3197 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3198 IBM905, IBM907, and IBM909
3199 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3200 [19443] build: build failures with -DDEBUG
3201 [19451] build: Make check fails on test-double-vlen2
3202 [19462] libc: Glibc failed to build with -Os
3203 [19465] math: Wrong code with -Os
3204 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3206 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3208 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3209 [19486] math: S390: Math tests fail with "Exception Inexact set".
3210 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3211 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3213 [19590] math: Fail to build shared objects that use libmvec.so functions.
3217 * The following bugs are resolved with this release:
3219 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3220 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3221 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3222 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3223 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3224 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3225 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3226 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3227 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3228 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3229 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3230 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3231 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3232 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3233 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3234 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3235 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3236 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3237 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3238 18657, 18676, 18694, 18696, 18887.
3240 * Cache information can be queried via sysconf() function on s390 e.g. with
3241 _SC_LEVEL1_ICACHE_SIZE as argument.
3243 * A buffer overflow in gethostbyname_r and related functions performing DNS
3244 requests has been fixed. If the NSS functions were called with a
3245 misaligned buffer, the buffer length change due to pointer alignment was
3246 not taken into account. This could result in application crashes or,
3247 potentially arbitrary code execution, using crafted, but syntactically
3248 valid DNS responses. (CVE-2015-1781)
3250 * The time zone file parser has been made more robust against crafted time
3251 zone files, avoiding heap buffer overflows related to the processing of
3252 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3253 large time zone data files. Overly long time zone specifiers in the TZ
3254 variable no longer result in stack overflows and crashes.
3256 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3257 for LD and GD on x86 and x86-64, has been implemented. You will need
3258 binutils-2.24 or later to enable this optimization.
3260 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3261 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3262 Hat). These updates cause user visible changes, such as the fix for bug
3265 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3266 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3267 condition in some applications.
3269 * Added vector math library named libmvec with the following vectorized x86_64
3270 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3272 The library can be disabled with --disable-mathvec. Use of the functions is
3273 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3274 Shared library libmvec.so is linked in as needed when using -lm (no need to
3275 specify -lmvec explicitly for not static builds).
3276 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3278 * A new fmemopen implementation has been added with the goal of POSIX
3279 compliance. The new implementation fixes the following long-standing
3280 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3281 old implementation is still present for use be by existing binaries.
3283 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3284 releases. It has been fixed to match 2.19 and older, but binaries built
3285 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3287 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3288 Contributed by Roland McGrath (Google).
3290 * The header <regexp.h> is deprecated, and will be removed in a future
3291 release. Use of this header will trigger a deprecation warning.
3292 Application developers should update their code to use <regex.h> instead.
3294 This header was formerly part of SUS, but was deprecated in 1994 and
3295 removed from the standard in 2001. Also, the glibc implementation
3296 leaks memory. See BZ#18681 for more details.
3300 * The following bugs are resolved with this release:
3302 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3303 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3304 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3305 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3306 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3307 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3308 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3309 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3310 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3311 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3314 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3315 too little memory for the to-be-scanned arguments and overflow the
3316 allocated buffer. The implementation now correctly computes the required
3317 buffer size when using malloc, and switches to malloc from alloca as
3320 * A new semaphore algorithm has been implemented in generic C code for all
3321 machines. Previous custom assembly implementations of semaphore were
3322 difficult to reason about or ensure that they were safe. The new version
3323 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3324 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3325 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3327 * Port to Altera Nios II has been contributed by Mentor Graphics.
3329 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3330 implementations for powerpc64/powerpc64le.
3331 Implemented by Adhemerval Zanella (IBM).
3333 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3334 and powerpc64le. This may improve lock scaling of existing programs on
3335 HTM capable systems. The lock elision code is only enabled with
3336 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3337 powerpc will issue a transaction abort on every syscall to avoid side
3338 effects being visible outside transactions.
3340 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3341 AArch64. Contributed by ARM Ltd.
3343 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3345 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3346 under certain input conditions resulting in the execution of a shell for
3347 command substitution when the application did not request it. The
3348 implementation now checks WRDE_NOCMD immediately before executing the
3349 shell and returns the error WRDE_CMDSUB as expected.
3351 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3352 processing format strings with a large number of format specifiers.
3354 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3355 infinite loop if the DNS response contained a PTR record of an unexpected
3358 * The minimum GCC version that can be used to build this version of the GNU
3359 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3360 still be used to compile programs using the GNU C Library.
3362 * The GNU C Library is now built with -Werror by default. This can be
3363 disabled by configuring with --disable-werror.
3365 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3367 * The obsolete sigvec function has been removed. This was the original
3368 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3369 programs have been using instead for about 25 years. Of course, ABI
3370 compatibility for old binaries using sigvec remains intact.
3372 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3373 with newer versions of bison.
3375 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3376 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3377 registers overlay two consecutive single-precision registers. MIPS32R2
3378 introduced a new FPU mode (FR=1) where double-precision registers extend the
3379 corresponding single-precision registers which is incompatible with the
3380 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3381 require the use of FR=1 making a transition necessary. New o32 ABI
3382 extensions enable users to migrate over time from the original o32 ABI
3383 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3384 tracks the ABI of any loaded object and verifies that new objects are
3385 compatible. Mode transitions will also be requested as required and
3386 unsupportable objects will be rejected. The ABI checks include both soft and
3387 hard float ABIs for o32, n32 and n64.
3389 GCC 5 with GNU binutils 2.25 onwards:
3390 It is strongly recommended that all o32 system libraries are built using the
3391 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3392 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3393 compiler using --with-fp-32=xx to set this by default.
3397 * The following bugs are resolved with this release:
3399 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3400 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3401 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3402 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3403 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3404 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3405 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3406 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3407 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3408 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3409 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3410 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3411 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3412 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3413 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3415 * Reverted change of ABI data structures for s390 and s390x:
3416 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3417 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3418 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3419 are preserved pointing straight to the same implementation as the old ones.
3420 Given that, new callers will simply provide a too-big buffer to these
3421 functions. Any applications/libraries out there that embed jmp_buf or
3422 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3423 against 2.19 headers will have to rebuilt again. This is necessary in any
3424 case to revert the breakage in their ABI caused by the glibc change.
3426 * Support for file description locks is added to systems running the
3427 Linux kernel. The standard file locking interfaces are extended to
3428 operate on file descriptions, not file descriptors, via the use of
3429 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3430 are associated with an open file instead of a process.
3432 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3434 * The minimum Linux kernel version that this version of the GNU C Library
3435 can be used with is 2.6.32.
3437 * Running the testsuite no longer terminates as soon as a test fails.
3438 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3439 with PASS or FAIL lines for individual tests. A summary of the results is
3440 printed, including a list of failing lists, and "make check" exits with
3441 error status if there were any unexpected failures. "make check
3442 stop-on-test-failure=y" may be used to keep the old behavior.
3444 * The am33 port, which had not worked for several years, has been removed
3447 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3448 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3449 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3450 conflicted with POSIX (support for which was removed in 2.19), the
3451 interfaces those macros enabled remain available when compiling with
3452 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3453 test macros defined.
3455 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3457 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3458 This may improve lock scaling of existing programs on TX capable systems.
3459 The lock elision code is only built with --enable-lock-elision=yes and
3460 then requires a GCC version supporting the TX builtins. With lock elision
3461 default mutexes are elided via __builtin_tbegin, if the cpu supports
3462 transactions. By default lock elision is not enabled and the elision code
3465 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3466 copy the path argument. This allowed programs to cause posix_spawn to
3467 deference a dangling pointer, or use an unexpected pathname argument if
3468 the string was modified after the posix_spawn_file_actions_addopen
3471 * All supported architectures now use the main glibc sysdeps directory
3472 instead of some being in a separate "ports" directory (which was
3473 distributed separately before glibc 2.17).
3475 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3476 On configurations that support it (all Linux configurations), it's now
3477 used regardless of the --enable-add-ons switch to configure. It is no
3478 longer possible to build such configurations without pthreads support.
3480 * Locale names, including those obtained from environment variables (LANG
3481 and the LC_* variables), are more tightly checked for proper syntax.
3482 setlocale will now fail (with EINVAL) for locale names that are overly
3483 long, contain slashes without starting with a slash, or contain ".." path
3484 components. (CVE-2014-0475) Previously, some valid locale names were
3485 silently replaced with the "C" locale when running in AT_SECURE mode
3486 (e.g., in a SUID program). This is no longer necessary because of the
3489 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3490 with application code using Intel MPX instructions. (With all previous
3491 versions, the MPX register state could be clobbered when making calls
3492 into or out of a shared library.) Note that while the new dynamic
3493 linker is compatible with all known x86 hardware whether or not it
3494 supports Intel MPX, some x86 instruction-set emulators might fail to
3495 handle the new instruction encodings. This is known to affect Valgrind
3496 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3497 release), and might affect other tools that do instruction emulation.
3499 * Support for loadable gconv transliteration modules has been removed.
3500 The support for transliteration modules has been non-functional for
3501 over a decade, and the removal is prompted by security defects. The
3502 normal gconv conversion modules are still supported. Transliteration
3503 with //TRANSLIT is still possible, and the //IGNORE specifier
3504 continues to be supported. (CVE-2014-5119)
3506 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3507 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3508 resulting a denial-of-service security vulnerability in applications which
3509 use functions related to iconv. (CVE-2014-6040)
3513 * The following bugs are resolved with this release:
3515 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3516 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3517 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3518 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3519 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3520 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3521 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3522 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3523 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3524 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3525 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3526 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3527 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3528 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3529 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3530 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3531 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3532 16431, 16453, 16474, 16506, 16510, 16529
3534 * Slovenian translations for glibc messages have been contributed by the
3535 Translation Project's Slovenian team of translators.
3537 * The public headers no longer use __unused nor __block. This change is to
3538 support compiling programs that are derived from BSD sources and use
3539 __unused internally, and to support compiling with Clang's -fblock
3540 extension which uses __block.
3542 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3543 large collation sequences to optimize multiple passes. This cache
3544 computation may overflow for large collation sequences and may cause a
3545 stack or buffer overflow. This is now fixed to use a slower algorithm
3546 which does not use a cache if there is an integer overflow.
3548 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3549 rules for large collation sequences to optimize multiple passes and falls
3550 back to alloca if malloc fails, resulting in a possible stack overflow.
3551 The implementation now falls back to an uncached collation sequence lookup
3554 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3555 initialized for static applications resulting in the security feature
3556 being disabled. The pointer guard is now correctly initialized to a
3557 random value for static applications. Existing static applications need
3558 to be recompiled to take advantage of the fix (bug 15754).
3560 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3561 to the d_name member of struct dirent, or omit the terminating NUL
3562 character. (Bugzilla #14699).
3564 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3565 aligned_alloc functions could allocate too few bytes or corrupt the
3566 heap when passed very large allocation size values (Bugzilla #15855,
3569 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3570 for AF_INET6 has been fixed (Bugzilla #16072).
3572 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3573 pap_CW, quz_PE, the_NP.
3575 * Substantially revised locales: gd_GB, ht_HT
3577 * The LC_ADDRESS field was updated to support country_car for almost all
3580 * ISO 1427 definitions were updated.
3582 * ISO 3166 definitions were updated.
3584 * The localedef utility now supports --big-endian and --little-endian
3585 command-line options to generate locales for a different system from that
3586 for which the C library was built.
3588 * Binary locale files now only depend on the endianness of the system for
3589 which they are generated and not on other properties of that system. As a
3590 consequence, binary files generated with new localedef may be incompatible
3591 with old versions of the GNU C Library, and binary files generated with
3592 old localedef may be incompatible with this version of the GNU C Library,
3593 in the following circumstances:
3595 + Locale files may be incompatible on m68k systems.
3597 + Locale archive files (but not separate files for individual locales) may
3598 be incompatible on systems where plain "char" is signed.
3600 * The configure option --disable-versioning has been removed. Builds with
3601 --disable-versioning had not worked for several years.
3603 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3604 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3606 * SystemTap probes for malloc have been introduced.
3608 * SystemTap probes for slow multiple precision fallback paths of
3609 transcendental functions have been introduced.
3611 * Support for powerpc64le has been added.
3613 * The soft-float powerpc port now supports e500 processors.
3615 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3617 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3618 set of header declarations that are enabled by default, even when other
3619 feature test macros or compiler options such as -std=c99 would otherwise
3620 disable some of those declarations.
3622 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3623 conflict with POSIX. The libbsd-compat library (which was a dummy library
3624 that did nothing) has also been removed.
3626 * Preliminary documentation about Multi-Thread, Async-Signal and
3627 Async-Cancel Safety has been added.
3629 * Change of ABI data structures for s390 and s390x:
3630 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3631 allow for future hardware extensions. All library functions that accept or
3632 return these structures were versioned in order to provide backwards
3633 compatibility with existing code. However, not all cases can be handled
3634 with interface versioning. If an application embeds either structure into
3635 another structure and that structure is passed to another compilation unit
3636 which expects the newer larger-sized object then any access to the new
3637 fields will result in undefined behaviour. Similarly any access to fields
3638 that were moved by the enlarging of the structures will cause undefined
3639 behaviour. To fix the undefined behaviour all objects that are part of the
3640 final in-memory image must agree on the size of structures, and this may
3641 require recompilation.
3645 * The following bugs are resolved with this release:
3647 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3648 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3649 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3650 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3651 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3652 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3653 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3654 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3655 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3656 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3657 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3658 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3659 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3662 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3663 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3664 Distributions can re-enable building and using pt_chown via the new configure
3665 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3666 considerable security risks and should only be used if the distribution
3667 understands and accepts the risks.
3669 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3672 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3673 fixed (Bugzilla #15330).
3675 * Add support for calling C++11 thread_local object destructors on thread
3676 and program exit. This needs compiler support for offloading C++11
3677 destructor calls to glibc.
3679 * Improved worst case performance of libm functions with double inputs and
3682 * Support for priority inherited mutexes in pthread condition variables on
3683 non-x86 architectures.
3685 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3687 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3689 * Optimized string functions for ARM. Implemented by Will Newton and
3692 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3694 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3697 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3698 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3700 * Added a benchmark framework to track performance of functions in glibc.
3702 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3703 It is based on draft TS 18661 and currently enabled as a GNU extension.
3705 * On Linux, the clock function now uses the clock_gettime system call
3706 for improved precision, rather than old times system call.
3708 * Added support for version-3 tz format files. This is needed when using
3709 the tz database release 2013e or later, and affects a few unusual cases --
3710 currently only TZ='America/Godthab' for time stamps after 2037.
3712 * Added new API functions pthread_getattr_default_np and
3713 pthread_setattr_default_np to get and set the default pthread
3714 attributes of a process.
3716 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3717 This may improve lock scaling of existing programs on TSX capable systems.
3718 When the --enable-lock-elision=yes parameter is specified at configure
3719 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3722 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3723 availability). Implemented by Ryan S. Arnold.
3725 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3729 * The following bugs are resolved with this release:
3731 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3732 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3733 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3734 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3735 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3736 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3737 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3738 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3739 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3740 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3741 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3742 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3743 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3744 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3745 14879, 14889, 14893, 14898, 14914.
3747 * Optimization of memcpy for MIPS.
3749 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3750 EMFILE has been fixed (Bugzilla #14889).
3752 * The add-on ports collection is now distributed in the "ports" subdirectory
3753 of the main GNU C Library distribution, rather than separately.
3755 * Port to ARM AArch64 contributed by Linaro.
3757 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3758 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3760 Implemented by Andreas Krebbel.
3762 * The new function secure_getenv allows secure access to the environment,
3763 returning NULL if running in a SUID/SGID process. This function replaces
3764 the internal function __secure_getenv.
3766 * SystemTap static probes have been added into the dynamic linker.
3767 Implemented by Gary Benson.
3769 * Optimizations of string functions strstr, strcasestr and memmem.
3770 Implemented by Maxim Kuvyrkov.
3772 * The minimum Linux kernel version that this version of the GNU C Library
3773 can be used with is 2.6.16.
3775 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3776 powerpc POWER7. Implemented by Will Schmidt.
3778 * New configure option --disable-nscd builds the C library such that it
3779 never attempts to contact the Name Service Caching Daemon (nscd).
3780 New configure option --disable-build-nscd avoids building nscd itself;
3781 this is the default if --disable-nscd is used.
3783 * Improved support for cross-compilation, including cross-testing and
3784 bootstrap builds without a previously built glibc.
3786 * Several testsuite tests are now able to test multiple IFUNC variants of an
3787 interface, rather than just testing the one that would be chooen by
3790 * New configure options --with-bugurl and --with-pkgversion, for
3791 distributors to use to embed their bug-reporting and package version
3792 information in --help and --version output.
3794 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3795 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3796 allows creation of chroots without the procfs mounted on /proc.
3798 * The `crypt' function now fails if passed salt bytes that violate the
3799 specification for those values. On Linux, the `crypt' function will
3800 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3801 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3802 when the mode is enabled.
3804 * The `clock_*' suite of functions (declared in <time.h>) is now available
3805 directly in the main C library. Previously it was necessary to link with
3806 -lrt to use these functions. This change has the effect that a
3807 single-threaded program that uses a function such as `clock_gettime' (and
3808 is not linked with -lrt) will no longer implicitly load the pthreads
3809 library at runtime and so will not suffer the overheads associated with
3810 multi-thread support in other code such as the C++ runtime library.
3812 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3817 * The following bugs are resolved with this release:
3819 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3820 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3821 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3822 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3823 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3824 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3825 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3826 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3827 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3828 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3829 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3830 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3831 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3832 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3833 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3834 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3835 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3836 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3837 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3838 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3839 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3840 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3843 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3844 configuring glibc with:
3845 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3846 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
3847 Implemented by H.J. Lu.
3851 + define static_assert
3853 + do not declare gets
3855 + declare at_quick_exit and quick_exit also for ISO C11
3857 + aligned_alloc. NB: The code is deliberately allows the size parameter
3858 to not be a multiple of the alignment. This is a moronic requirement
3859 in the standard but it is only a requirement on the caller, not the
3862 + timespec_get added
3864 + uchar.h support added
3866 + CMPLX, CMPLXF, CMPLXL added
3868 Implemented by Ulrich Drepper.
3870 * Support for the IA-64 has been moved to ports.
3872 * Remove support for anything but ELF binary format
3874 * Checking versions of poll, ppoll added.
3875 Implemented by Ulrich Drepper.
3877 * More generic and 64-bit performance optimizations to math functions.
3878 Implemented by Ulrich Drepper.
3880 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3881 headers and functions available at compile time as they were before
3882 version 2.14. This option will be removed at some time in the future
3883 after the TI-RPC library becomes fully sufficient for the needs of
3884 existing applications.
3886 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3887 Note that glibc is not expected to work with any Linux kernel version
3890 * New header <sys/auxv.h> and function getauxval allowing easy access to
3891 the AT_* key-value pairs passed from the Linux kernel. The header also
3892 defines the HWCAP_* bits associated with the AT_HWCAP key.
3894 * New locales: mag_IN
3896 * New configure option --enable-systemtap builds SystemTap static probes
3897 into libc for setjmp and longjmp and into libpthread for various operations.
3898 So far the setjmp/longjmp probes and some of the libpthread probes are
3899 provided only for i*86 and x86_64.
3900 Implemented by Roland McGrath and Rayson Ho.
3902 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3904 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3907 * More optimized functions for SPARC. Implemented by David S. Miller.
3909 * Improved support for cross-compilation, especially bootstrap builds
3910 without a previously built glibc.
3912 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3913 Chris Metcalf from Tilera.
3915 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3916 now supported for ARM processors.
3918 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3919 as the name of the dynamic linker, to distinguish it from the
3920 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3922 * Support for CRIS has been removed from ports.
3924 * A new class of installed header has been documented for low-level
3925 platform-specific functionality. PowerPC added the first instance with a
3926 function to provide time base register access. Contributed by Tulio
3927 Magno Quites Machado Filho.
3929 * ix86 configurations now install header files that are consistent with
3930 what x86-64 configurations install. These same header files can be used
3931 for -m32, -m64, or -mx32 builds.
3932 Contributed by H.J. Lu.
3934 * Math library bug fixes. A thorough audit of all open math library bugs was
3935 conducted by Joseph Myers. Significant progress was made on many math
3936 library bugs resulting in more accurate exceptions and function results.
3937 Many thanks to all those that contributed including Andreas Jaeger for his
3938 patch review and work on the x87 trigonometric instruction issues.
3940 * Timezone data is no longer installed. Timezone-related binaries and scripts
3941 will continue to be installed. Users should obtain their timezone data from
3942 their distribution provider or from the tzdata package at
3943 <ftp://munnari.oz.au/pub/>.
3947 * The following bugs are resolved with this release:
3949 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3950 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3951 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3952 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3953 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3954 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3955 13484, 13506, 13515, 13523, 13524, 13538, 13540
3957 * New program pldd to list loaded object of a process
3958 Implemented by Ulrich Drepper.
3960 * Add nss_db support back to glibc. No more dependency on Berkeley db
3961 and support for initgroups lookups.
3962 Implemented by Ulrich Drepper.
3964 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3965 Contributed by HJ Lu.
3967 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3968 Contributed by HJ Lu.
3970 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3971 on x86-32 and x86-64.
3972 Contributed by Liubov Dmitrieva.
3974 * Optimized strchr and strrchr for SSE on x86-32.
3975 Contributed by Liubov Dmitrieva.
3977 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3978 for x86-64 and x86-32.
3979 Contributed by Liubov Dmitrieva.
3981 * New interfaces: scandirat, scandirat64
3982 Implemented by Ulrich Drepper.
3984 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3985 Implemented by Ulrich Drepper.
3987 * nscd now also caches the netgroup database.
3988 Implemented by Ulrich Drepper.
3990 * Integrate libm with gcc's -ffinite-math-only option.
3991 Implemented by Ulrich Drepper.
3993 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3994 to math functions. Implemented by Ulrich Drepper.
3996 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3997 Implemented by Ulrich Drepper.
3999 * New Linux interfaces: process_vm_readv, process_vm_writev
4001 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4002 Implemented by Ulrich Drepper.
4004 * Optimized nearbyint and strcasecmp for PPC.
4005 Implemented by Adhemerval Zanella.
4007 * New locales: bho_IN, unm_US, es_CU, ta_LK
4011 * The following bugs are resolved with this release:
4013 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4014 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4015 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4016 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4017 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4018 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4019 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4020 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4021 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4022 12795, 12811, 12813, 12814, 12841
4024 * The RPC implementation in libc is obsoleted. Old programs keep working
4025 but new programs cannot be linked with the routines in libc anymore.
4026 Programs in need of RPC functionality must be linked against TI-RPC.
4027 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4029 Visible changes of this change include (obviously) the inability to link
4030 programs using RPC functions without referencing the TI-RPC library and the
4031 removal of the RPC headers from the glibc headers.
4032 Implemented by Ulrich Drepper.
4034 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4035 syncfs, setns, sendmmsg
4037 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4038 yue_HK, lij_IT, mhr_RU
4040 * New encodings: CP770, CP771, CP772, CP773, CP774
4042 * New program sotruss to trace calls through PLTs
4043 Implemented by Ulrich Drepper.
4045 * The malloc hook implementation is marked deprecated and will be removed
4046 from the default implementation in the next version. The design never
4047 worked ever since the introduction of threads. Even programs which do
4048 not create threads themselves can use multiple threads created internally.
4052 * The following bugs are resolved with this release:
4054 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4055 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4056 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4057 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4060 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4062 * POWER7 optimizations: memset, memcmp, strncmp
4064 * New optimized string functions for x86-64: strnlen (SSE2),
4065 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4066 Implemented by Ulrich Drepper.
4070 * The following bugs are resolved with this release:
4072 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4073 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4074 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4075 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4076 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4077 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4078 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4079 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4081 * New interfaces: pthread_getname_np, pthread_setname_np
4083 * New Linux interface: recvmmsg
4085 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4087 * The dynamic linker now recognizes supported ABI versions from the
4088 EI_ABIVERSION field in the ELF header.
4089 Implemented by Ulrich Drepper.
4091 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4092 will not be used to fill in password fields in the passwd.byname replies.
4093 Instead it is used to synthesize the shadow.byname table, should it be
4094 missing. This is a useful mode in some installations involving Solaris.
4095 Implemented by Ulrich Drepper.
4097 * New locales: kok_IN, sq_MK, cv_RU
4101 * The following bugs are resolved with this release:
4103 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4104 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4105 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4106 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4107 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4108 10789, 10817, 10823, 10840, 10847
4110 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4112 Implemented by Ulrich Drepper.
4114 * Checking version of longjmp added that fails if an uninitialized stack
4115 frame would be created. Implemented by Ulrich Drepper.
4117 * STT_GNU_IFUNC is now supported in static executables.
4118 Implemented by H.J. Lu.
4120 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4122 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4123 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4124 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4125 Contributed by H.J. Lu.
4127 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4128 Implemented by Ulrich Drepper.
4130 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4132 Contributed by H.J. Lu.
4134 * Support for fma instruction in AVX on x86-64.
4135 Implemented by H.J. Lu and Ulrich Drepper.
4137 * AVX support in x86-64 auditing support in ld.so.
4138 Implemented by H.J. Lu.
4140 * STB_GNU_UNIQUE support added.
4141 Implemented by Ulrich Drepper.
4143 * Implement second fallback mode for optimized DNS lookup for even more
4144 broken environments. If two requests from the same port are not
4145 handled correctly close the socket and open a new one before sending
4146 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4147 can be used to select this mode right away, instead of rediscovering the
4148 necessity is every process again.
4149 Implemented by Ulrich Drepper.
4151 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4152 Implemented by Adam Tkac.
4154 * Optimized iconv conversions for S390x.
4155 Implemented by Andreas Krebbel.
4157 * Using condvars with PI mutexes is now more efficient due to kernel
4158 support for requeueing to PI futexes. NPTL support added for x86-64.
4159 Implemented by Ulrich Drepper.
4161 * New locales: ps_AF, my_MM
4165 * The following bugs are resolved with this release:
4167 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4168 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4169 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4170 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4171 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4173 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4174 Implemented by Ulrich Drepper.
4176 * New Linux interfaces: accept4, fallocate, fallocate64.
4177 Implemented by Ulrich Drepper.
4179 * Correct declarations of string function when used in C++ code. This
4180 could lead to compile errors for invalid C++ code.
4182 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4185 * New POSIX 2008 interface: psiginfo
4186 Implemented by Ulrich Drepper.
4188 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4189 Implemented by Ulrich Drepper.
4191 * Support for selecting between multiple function definitions at runtime
4192 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4194 * The libcrypt library can now use the hash function implementations in
4195 NSS. Implemented by Ulrich Drepper.
4197 * The malloc implementation can be compiled to be less memory efficient
4198 but higher performing in multi-threaded programs.
4199 Implemented by Ulrich Drepper.
4201 * New locales: nan_TW@latin, ks_IN
4203 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4204 Implemented by Ulrich Drepper.
4206 * Extended printf hook support. It is possible to use user-defined types
4207 and extend existing format specifiers.
4208 Implemented by Ulrich Drepper.
4210 * Handling for group shadow files has been added.
4211 Implemented by Ulrich Drepper.
4213 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4214 servers (the case, e.g., for some people using the built-in DNS
4215 server in ADSL modems/routers). There is a once-per-process timeout
4216 in case of a broken server. To avoid it, users can run nscd or put
4217 'options single-request' in /etc/resolv.conf.
4218 Implemented by Ulrich Drepper.
4222 * The following bugs are resolved with this release:
4224 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4225 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4226 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4227 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4228 6968, 6974, 6980, 6995, 7008, 7009, 7029
4230 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4231 up at the same time. Implemented by Ulrich Drepper.
4233 * TLS descriptors for LD and GD on x86 and x86-64.
4234 Implemented by Alexandre Oliva.
4236 * getaddrinfo now handles DCCP and UDPlite.
4237 Implemented by Ulrich Drepper.
4239 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4240 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4241 Implemented by Ulrich Drepper.
4243 * New implementation of memmem, strstr, and strcasestr which is O(n).
4244 Implemented by Eric Blake.
4246 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4248 * Implement "e" option for popen to open file descriptor with the
4249 close-on-exec flag set. Implemented by Ulrich Drepper.
4251 * Implement "b" mode for fmemopen. In this mode writes writes don't
4252 implicitly add a NUL byte and seeks from the end of the buffer really
4253 use the buffer end, not the string length as the basis.
4254 Implemented by Ulrich Drepper.
4256 * Many functions, exported and internal, now atomically set the close-on-exec
4257 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4259 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4261 Implemented by Pravin Satpute.
4263 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4267 * The following bugs are resolved with this release:
4269 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4270 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4271 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4272 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4273 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4274 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4275 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4277 * New locales: bo_CN, bo_IN, shs_CA.
4279 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4281 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4282 Implemented by Pravin Satpute.
4284 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4286 * nscd caches now all timeouts for DNS entries
4287 Implemented by Ulrich Drepper.
4289 * nscd is more efficient and wakes up less often.
4290 Implemented by Ulrich Drepper.
4292 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4293 vdprintf, and obstack_vprintf.
4294 Implemented by Jakub Jelinek.
4296 * Faster memset for x86-64.
4297 Implemented by Harsha Jagasia and H.J. Lu.
4299 * Faster memcpy on x86.
4300 Implemented by Ulrich Drepper.
4302 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4303 Implemented by Ulrich Drepper.
4305 * Faster sqrt and sqrtf implemention for some PPC variants.
4306 Implemented by Steven Munroe.
4310 * The following bugs are resolved with this release:
4312 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4313 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4314 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4315 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4316 5071, 5103, 5104, 5112, 5113, 5184, 5186
4318 * More checking functions: fread, fread_unlocked, open*, mq_open.
4319 Implemented by Jakub Jelinek and Ulrich Drepper.
4321 * Extend fortification to C++. Implemented by Jakub Jelinek.
4323 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4324 by not recognizing 'a' as a modifier when those specs are requested.
4325 Implemented by Jakub Jelinek.
4327 * PPC optimizations to math and string functions.
4328 Implemented by Steven Munroe.
4330 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4331 options to be passed. Implemented by Ulrich Drepper.
4333 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4335 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4336 Implemented by Ulrich Drepper.
4338 * Handle private futexes in the NPTL implementation.
4339 Implemented by Jakub Jelinek and Ulrich Drepper.
4341 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4342 Implemented by Roland McGrath and Ulrich Drepper.
4344 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4346 * SHA-256 and SHA-512 based password encryption.
4347 Implemented by Ulrich Drepper.
4349 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4350 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4353 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4354 Implemented by Ulrich Drepper.
4358 * The following bugs are resolved with this release:
4360 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4361 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4362 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4363 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4364 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4365 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4366 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4369 * New Linux interfaces: epoll_pwait, sched_getcpu.
4371 * New generic interfaces: strerror_l.
4373 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4377 * The following bugs are resolved with this release:
4379 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4380 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4381 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4382 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4383 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4384 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4385 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4386 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4387 3225, 3251, 3252, 3253, 3273
4389 * For Linux, the sorting of addresses returned by getaddrinfo now also
4390 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4391 Implemented by Ulrich Drepper.
4393 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4394 Implemented by Ulrich Drepper.
4396 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4398 * New iconv module for MIK. Contributed by Alexander Shopov.
4400 * For sites with broken group and/or passwd database, the auto-propagate
4401 option of nscd can prevent creating ID lookup entries from the results
4402 of a name lookup and vice versa. This usually is no problem but some
4403 site might have problems with the default behavior.
4404 Implemented by Ulrich Drepper.
4406 * Iterating over entire database in NIS can be slow. With the
4407 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4408 to trade time for memory. The entire database will be read at once.
4409 Implemented by Ulrich Drepper.
4411 * The interfaces introduced in RFC 3542 have been implemented by
4414 * Support for the new ELF hash table format was added by Ulrich Drepper.
4416 * Support for priority inheritance mutexes added by Jakub Jelinek and
4419 * Support for priority protected mutexes added by Jakub Jelinek.
4421 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4422 or_IN, csb_PL, fy_NL, sr_ME.
4426 * More overflow detection functions.
4428 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4429 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4431 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4432 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4433 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4434 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4435 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4436 by Masahide Washizawa.
4438 * It is now possible to install audit libraries for the dynamic linker using
4439 LD_AUDIT. Implemented by Ulrich Drepper.
4441 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4442 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4443 For a libc and libpthread that works well on Linux 2.4 kernels, we
4444 recommend using the stable 2.3 branch.
4446 * The new function open_wmemstream acts like open_memstream,
4447 but uses a wchar_t wide character buffer.
4449 * The new function ppoll is an improved version of poll, similar to pselect.
4451 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4452 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4453 renameat, unlinkat, linkat, symlinkat, readlinkat.
4455 * New Linux kernel system calls: unshare,
4456 inotify_init, inotify_add_watch, inotify_rm_watch.
4458 * The euidaccess function is now also known by the alias eaccess,
4459 for compatibility with some other systems.
4461 * Timezone data updated to 2006b version.
4465 * The following bugs are resolved with this release:
4467 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4468 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4469 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4470 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4471 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4472 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4474 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4476 * As of this release, GCC 4 can be used to compile the C Library.
4478 * Timezone data updated to 2005m version.
4482 * The following bugs are resolved with this release:
4484 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4485 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4486 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4487 777, 787, 821, 822, 823, 825
4489 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4493 * Support for RFC 3678. Real implementations exist only for Linux so far.
4494 Implemented by Ulrich Drepper.
4496 * nscd can now cache entries persistently. Expiring entries are reloaded.
4497 For speedups the cache can be shared in memory with client processes.
4498 Implemented by Ulrich Drepper.
4500 * nscd can now perform SELinux checks.
4501 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4503 * getaddrinfo queries are now cached. Canonical name lookup is performed
4505 Implemented by Ulrich Drepper.
4507 * The nothrow function attribute is used when headers are used by gcc when
4508 compiling C code. This can avoid significant amounts of exception
4511 * The malloc functions perform more error checking and are stricter when
4512 it comes to reacting on errors. The default action is to terminate
4513 the process after showing an error message. Implemented by Ulrich Drepper.
4515 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4516 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4518 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4519 namespaces using the new function dlmopen(). This feature is of course,
4520 like most other dynamic loading functionality, not available in statically
4521 linked applications. Implemented by Ulrich Drepper.
4523 * Low-overhead boundary checking variants of string and some stdio functions
4524 were added. These are to be used in conjunction with a gcc patch by
4525 Jakub Jelinek which adds calls to these functions if possible.
4526 Implemented by Jakub Jelinek and Ulrich Drepper.
4528 * Old code for several operating systems and machine architectures that
4529 have not been in working condition in a long time have been removed from
4530 the main source tree maintained by the GNU C Library's maintainers.
4531 These files are now reside in the separate `ports' source module
4532 that is usable as an add-on when building the library.
4536 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4537 interrogate the dynamic linker, compatible with the Solaris interface.
4539 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4540 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4542 * getifaddrs now uses the netlink interface on Linux to get its information.
4543 Implemented by Thorsten Kukuk.
4545 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4546 Implemented by Ulrich Drepper.
4548 * support for non-executable stacks on x86 has been added. Changes mostly
4551 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4554 * getaddrinfo now performs destination address selection according to
4559 * Thread-safe interfaces for many functions that access locale data
4560 were added in version 2.3, but these features were omitted from NEWS.
4561 Many functions have variants with an `_l' suffix that take a `locale_t'
4562 object as a parameter rather than consulting the current locale.
4563 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4564 create and maintain `locale_t' objects. Additionally, the new function
4565 `uselocale' sets "the current locale" (as used by functions not so
4566 parameterized) set for an individual thread. These features were added
4567 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4569 * The functions getresuid, getresgid, setresuid, and setresgid, which
4570 have long been available on Linux, are now declared in <unistd.h>
4571 and are now also available on the Hurd.
4573 * ELF thread-local storage support (TLS) now works on x86-64.
4575 * The new dynamic string token $LIB is expanded in shared library names.
4576 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4578 * Aldy Hernandez contributed complete software floating point support for
4579 PowerPC machines with no FPU.
4581 * fexecve is implemented on Linux.
4583 * The `btowc' function should work at least twice as fast due to
4584 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4586 * With approriate thread add-ons cancelable functions are now implemented
4587 in libc.so as well. No need to call the function in libpthread. This
4588 change allowed to finally disable the incorrect and expensive handling
4589 of weak definition in ld.so.
4591 * Yet more PLT entries in libc.so have been removed. We finally arrived
4592 at the bare minimum. Startup times improved appropriately.
4594 * Support for the new Linux/x86 system call interface was added. The
4595 AT_SYSINFO auxiliary vector entry is recognized and handled.
4599 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4602 * iconv (the program and the interface) now accepts empty names (excluding
4603 options like //TRANSLIT) to mean "use charset of current locale".
4605 * localedef can now transliterate characters in strings which are not in
4606 the provided charmap. The information from the input locale is used.
4608 * Prelinking support was added for ELF targets. This requires additional
4609 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4611 * Read-only stdio streams now use mmap to speed up operation by eliminating
4612 copying and buffer underflows. To use add 'm' to the mode string of
4613 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4615 * The malloc functions were completely rewritten by Wolfram Gloger based
4616 on Doug Lea's malloc-2.7.0.c.
4618 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4619 implementation of regex.
4621 * Bruno Haible upgraded the iconv and locale implementation to support
4624 * Contents of the LC_* and LANG environment variables in the CEN style are
4625 not recognized anymore. It never was used. Change by Ulrich Drepper.
4627 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4628 thread-local storage (TLS) ABI on some platforms.
4629 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4631 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4632 EUC-JISX0213, and TSCII.
4634 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4635 BSD-compatible interface for getting all network interface addresses.
4636 Implementation for IPv4 by Roland McGrath.
4638 * Loading of locale data is faster due to the introduction of a locale
4639 archive. Implemented by Roland McGrath and Ulrich Drepper.
4641 * Startup times are significantly reduced by not using exported functions
4642 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4645 * Steven Munroe contributed a port to PowerPC64/Linux.
4649 * The Hurd now uses the GNU libio implementation of stdio rather than the
4650 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4652 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4653 with the same behavior as the Linux system call of the same name.
4657 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4658 128-bit long double format.
4660 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4661 IBM1161, and IBM1162 charsets.
4663 * Andreas Jaeger contributed a port to x86-64/Linux.
4665 * Peter Bruin contributed a port to PowerPC/Hurd.
4667 * libc functions using I/O streams now can handle wide-oriented streams
4670 * optimizations in the dynamic linker. Binaries created by recent binutils
4671 versions start up quicker due to reduced time spent on relocations.
4673 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4677 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4678 asinh, atanh, j0 for the 128-bit long double format.
4680 * Bruno Haible updated all the code handling Unicode in some form to
4681 support Unicode 3.1.
4683 * Speed of regex for single-byte locales is back to previous levels.
4684 Patch by Isamu Hasegawa.
4686 * Alpha, SPARC, and IA-64 now also using floating stacks.
4688 * Startup time of internationalized applications greatly improved through
4689 iconv cache. Use iconvconfig to generate the cache file.
4690 Contributed by Ulrich Drepper.
4692 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4693 severe performance problems. Patch by David Mosberger.
4695 * The Hurd port got a lot more functionality like AIO, various stdio
4696 extensions, etc. Mainly done by Roland McGrath.
4698 * mtrace can now lookup symbols in shared libraries.
4702 * Intel's IA-64 math library is largely integrated. It provides fast and
4703 accurate implementatations for most basic and standard math functions
4704 in float, double, and long double format.
4706 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4707 and asin for the 96-bit long double format and asin, log, tan for the
4708 128-bit long double format.
4710 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4711 The basic double functions exist today. Contributed by Abraham Ziv
4712 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4713 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4715 * An asynchronous name lookup library was added. The interface is designed
4716 after POSIX AIO. The proposal was circulated beforehand to get comments.
4717 No negative ones came in. Implemented by Ulrich Drepper.
4719 * Port to S390/64bit contributed by Martin Schwidefsky
4720 <schwidefsky@de.ibm.com>.
4722 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4723 of functions for Linux/IA-64.
4725 * The RPC code is now thread safe. Threads can now use the same service
4726 of different services at the same time. Patch by Eric Norum
4727 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4729 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4730 family of functions for Linux/S390.
4732 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4733 of functions for Linux/x86.
4735 * Port to Linux/CRIS contributed by Axis Communications.
4739 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4740 we can now check for namespace violations and missing declarations. The
4741 result is that almost all headers are now Unix-compliant (as defined in
4742 the upcoming XPG6). The negative side is that some programs might need
4743 corrections, too, if they depend on the incorrect form of the headers in
4744 previous versions which defined too many symbols and included too many
4747 * regex now handles multibyte character sets correctly.
4748 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4750 * iconv (the program) does now conform to the upcoming XPG6 and handles
4751 charmaps. Instead of the charset names the path of charmaps can be
4752 provided and the conversion happens based on this data.
4753 Contributed by Ulrich Drepper.
4755 * The locale program now provides detailed information about the installed
4760 only lists the names of the supported locales
4764 provides details such as country, language, and codeset name.
4765 Contributed by Ulrich Drepper.
4769 * The gencat program now parses the input file according to the charset
4770 selected by the LC_CTYPE category. This is important for stateful
4771 character sets. To make generating catalogs easier there is a way
4772 to overwrite the charset selected by the locale: before the first
4773 message or $ quote line the catalog can contain a line like
4775 $ codeset=ISO-8859-2
4777 to select the charset (ISO-8859-2 in this case).
4779 Implemented by Shinya Hanataka and Ulrich Drepper.
4781 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4782 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4783 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4785 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4786 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4788 * The LANGUAGE environment variable is now ignored unless the locale is
4789 changed from the default "C" locale.
4791 * The usual bug fixes.
4795 * Greg McGary added runtime support for bounds checking using gcc's
4796 new -fbounded-pointers option. ix86 target is complete. PowerPC
4799 * Thorsten Kukuk added secure mode support to nscd.
4801 * The Berkeley db libraries have been removed.
4803 Related, the nss_db module is now in a separate package since it
4804 obviously requires a database library being available.
4806 * Wide character I/O streams implemented by Ulrich Drepper.
4808 * Functions from the extended socket API added by Ulrich Drepper.
4810 * Functions feenableexcept and fedisableexcept to control the
4811 behaviour of individual exceptions have been added by Andreas Jaeger.
4813 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4815 * The resolver code has been updated from bind 8.2.3-T5B which supports
4816 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4819 This change could in some situations effect backward compatibility. Since
4820 now `_res' is a thread-local instead of a global variable, modifying it
4821 in one thread does not have any effect in other threads.
4823 The resolver library was also extended to allow IPv6 as the transport
4824 protocol for the requests. This work was done by Stig Venaas.
4826 * Compatibility code for K&R C compilers has been removed from the
4827 header files. A ISO C compiler is needed to use the library
4828 (conforming to either C89 or C99 standard).
4830 * Complete rewrite of the localedef program to support multibyte character
4831 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4832 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4833 Implemented by Ulrich Drepper.
4835 Bruno Haible significantly improved the generation and use of the data
4836 structures for the wide character tables.
4838 * Plural handling in gettext implemented by Ulrich Drepper.
4840 * The utmp daemon has been removed.
4842 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4844 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4847 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4849 * POSIX barriers implemented by Kaz Kylheku.
4851 * POSIX spawn function family implemented by Ulrich Drepper.
4853 * POSIX spinlocks are now available.
4855 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4857 * the configure option --enable-kernel=X.Y.Z allows to strip out
4858 compatibility for kernel versions before X.Y.Z. This is currently only
4859 implemented for Linux.
4861 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4862 field sin6_scope_id. This means that all programs using IPv6 should be
4863 recompiled. Don't expect binary compatibility with previous glibc
4866 * various conversion modules for IBM character sets contributed by
4869 * IA-64 port by Jes Sorensen and HJ Lu.
4883 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4885 * New xdr functions are added; some rpc functions are now 64bit clean.
4887 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4889 * Fixed known incompatibilities with glibc 2.0.
4891 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4893 * Optimized a number of functions (especially the ELF dynamic loader).
4895 * Update timezone data files.
4897 * lots of charmaps corrections
4899 * some new locale definitions and charmaps
4904 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4905 conform to POSIX member type requirements. Symbol versions have been
4906 adjusted as needed within the library, and for direct use by applications,
4907 but there is potential for problems if third-party libraries use
4908 struct timeval as part of their interface. This does not present
4909 a problem for X and other "essential" system libraries.
4911 * An additional locale model to support C++ Standard Library locale
4912 model and probably more was implemented by Ulrich Drepper.
4914 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4917 * Miles Bader provided the `argp' function family to support hierachical
4918 command line argument parsing, layered on top of getopt.
4920 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4922 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4925 * scanf recognizes the %a and %A format for scanning floating point numbers.
4927 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4928 information and interfaces for the available integer types.
4930 * about 130 new math functions were added to implement the ISO C9x math
4933 * the new header <complex.h> contains definitions of the complex math
4934 functions from ISO C 9X.
4936 * the new header <tgmath.h> defines generic macros to use complex or
4937 real valued functions.
4939 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4941 * Andreas Jaeger provided a test suite for the math library.
4943 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4945 * Ulrich Drepper added character set conversion functions (iconv).
4947 * Optimized string functions have been added.
4949 * The localedata addon is now part of glibc.
4951 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4953 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4954 daemon for NSS (nscd).
4956 Missing a better place here are some numbers on improvements. Under
4957 Linux 2.1.125 un-tar-ing the kernel sources takes
4961 using local files 12.19s 6.88s 22.91s
4963 using NIS 13.92s 8.91s 26.34s
4965 using NIS & nscd 10.37s 7.34s 25.30s
4967 using NIS+ 27.57s 30.37s 640.46s
4969 using NIS+ & nscd 10.25s 7.83s 26.51s
4971 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4973 Keep in mind that non-namelookup related operations dominate above times.
4974 It was just a common complain that using NIS+ unpacking the kernel is
4977 [1] The old nscd implementation is not available anymore since it was
4978 distributed with glibc up to version 2.0.98 and thus is now replaced.
4980 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4982 * Mark Kettenis provided a Hesiod NSS module.
4984 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4985 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4987 * rcmd can now handle netgroups (Dick Streefland).
4989 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4992 * Support for the IPv6 protocol has been added to the socket API, as per the
4993 latest draft standards.
4995 * Support for Linux 2.2 has been added.
4997 * Interface changes relative to the latest 2.0.x release:
4998 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4999 addseverity NEW: Unix98
5000 alphasort64 NEW: LFS
5001 argp_err_exit_status NEW: argp, GNU ext
5002 argp_error NEW: argp, GNU ext
5003 argp_failure NEW: argp, GNU ext
5004 argp_help NEW: argp, GNU ext
5005 argp_parse NEW: argp, GNU ext
5006 argp_program_bug_address NEW: argp, GNU ext
5007 argp_program_version NEW: argp, GNU ext
5008 argp_program_version_hook NEW: argp, GNU ext
5009 argp_state_help NEW: argp, GNU ext
5010 argp_usage NEW: argp, GNU ext
5011 authdes_create NEW: Secure RPC
5012 authdes_getucred NEW: Secure RPC
5013 authdes_pk_create NEW: Secure RPC
5014 backtrace NEW: GNU ext.
5015 backtrace_symbols NEW: GNU ext.
5016 backtrace_symbols_fd NEW: GNU ext.
5018 cacosf NEW: ISO C 9x
5019 cacosh NEW: ISO C 9x
5020 cacoshf NEW: ISO C 9x
5021 cacoshl NEW: ISO C 9x
5022 cacosl NEW: ISO C 9x
5029 casinf NEW: ISO C 9x
5030 casinh NEW: ISO C 9x
5031 casinhf NEW: ISO C 9x
5032 casinhl NEW: ISO C 9x
5033 casinl NEW: ISO C 9x
5035 catanf NEW: ISO C 9x
5036 catanh NEW: ISO C 9x
5037 catanhf NEW: ISO C 9x
5038 catanhl NEW: ISO C 9x
5039 catanl NEW: ISO C 9x
5040 cbc_crypt NEW: Secure RPC
5044 ccoshf NEW: ISO C 9x
5045 ccoshl NEW: ISO C 9x
5051 cimagf NEW: ISO C 9x
5052 cimagl NEW: ISO C 9x
5053 clearerr_locked REMOVED
5054 clntunix_create NEW: sunrpc ext
5056 clog10 NEW: ISO C 9x
5057 clog10f NEW: ISO C 9x
5058 clog10l NEW: ISO C 9x
5068 cprojf NEW: ISO C 9x
5069 cprojl NEW: ISO C 9x
5071 crealf NEW: ISO C 9x
5072 creall NEW: ISO C 9x
5077 csinhf NEW: ISO C 9x
5078 csinhl NEW: ISO C 9x
5081 csqrtf NEW: ISO C 9x
5082 csqrtl NEW: ISO C 9x
5086 ctanhf NEW: ISO C 9x
5087 ctanhl NEW: ISO C 9x
5089 des_setparity NEW: Secure RPC
5090 ecb_crypt NEW: Secure RPC
5091 endutxent NEW: Unix98
5093 exp10f NEW: ISO C 9x
5094 exp10l NEW: ISO C 9x
5098 fattach NEW: STREAMS
5099 fdetach NEW: STREAMS
5103 feclearexcept NEW: ISO C 9x
5104 fegetenv NEW: ISO C 9x
5105 fegetexceptflag NEW: ISO C 9x
5106 fegetround NEW: ISO C 9x
5107 feholdexcept NEW: ISO C 9x
5109 feraiseexcept NEW: ISO C 9x
5110 ferror_locked REMOVED
5111 fesetenv NEW: ISO C 9x
5112 fesetexceptflag NEW: ISO C 9x
5113 fesetround NEW: ISO C 9x
5114 fetestexcept NEW: ISO C 9x
5115 feupdateenv NEW: ISO C 9x
5116 fflush_locked REMOVED
5120 fgets_unlocked NEW: GNU ext.
5121 fileno_locked REMOVED
5133 fputc_locked REMOVED
5134 fputs_unlocked NEW: GNU ext.
5135 fread_unlocked NEW: GNU ext.
5140 fstatvfs NEW: Unix98
5144 ftruncate64 NEW: LFS
5146 fwrite_unlocked NEW: GNU ext.
5147 gai_strerror NEW: IPv6
5151 getchar_locked REMOVED
5153 getdate_err NEW: Unix98
5154 getdate_r NEW: GNU ext.
5156 getnameinfo NEW: IPv6
5157 getnetname NEW: Secure RPC
5158 getpmsg NEW: STREAMS
5159 getpt NEW: Unix98 PTY
5160 getrlimit64 NEW: LFS
5161 getutxent NEW: Unix98
5162 getutxid NEW: Unix98
5163 getutxline NEW: Unix98
5164 glob64 NEW: GNU ext.
5165 globfree64 NEW: GNU ext.
5166 gnu_get_libc_release NEW: GNU ext.
5167 gnu_get_libc_version NEW: GNU ext.
5168 grantpt NEW: Unix98 PTY
5169 host2netname NEW: Secure RPC
5171 iconv_close NEW: iconv
5172 iconv_open NEW: iconv
5173 if_freenameindex NEW: IPv6
5174 if_indextoname NEW: IPv6
5175 if_nameindex NEW: IPv6
5176 if_nametoindex NEW: IPv6
5177 in6addr_any NEW: IPv6
5178 in6addr_loopback NEW: IPv6
5179 inet6_isipv4mapped NEW: IPv6
5180 isastream NEW: STREAMS
5181 iswblank NEW: GNU ext.
5182 key_decryptsession NEW: Secure RPC
5183 key_decryptsession_pk NEW: Secure RPC
5184 key_encryptsession NEW: Secure RPC
5185 key_encryptsession_pk NEW: Secure RPC
5186 key_gendes NEW: Secure RPC
5187 key_get_conv NEW: Secure RPC
5188 key_secretkey_is_set NEW: Secure RPC
5189 key_setnet NEW: Secure RPC
5190 key_setsecret NEW: Secure RPC
5191 llrint NEW: ISO C 9x
5192 llrintf NEW: ISO C 9x
5193 llrintl NEW: ISO C 9x
5194 llround NEW: ISO C 9x
5195 llroundf NEW: ISO C 9x
5196 llroundl NEW: ISO C 9x
5201 lrintf NEW: ISO C 9x
5202 lrintl NEW: ISO C 9x
5203 lround NEW: ISO C 9x
5204 lroundf NEW: ISO C 9x
5205 lroundl NEW: ISO C 9x
5207 makecontext NEW: Unix98
5208 mempcpy NEW: GNU ext.
5211 modify_ldt NEW: kernel
5215 nearbyint NEW: ISO C 9x
5216 nearbyintf NEW: ISO C 9x
5217 nearbyintl NEW: ISO C 9x
5218 netname2host NEW: Secure RPC
5219 netname2user NEW: Secure RPC
5220 nexttoward NEW: ISO C 9x
5221 nexttowardf NEW: ISO C 9x
5222 nexttowardl NEW: ISO C 9x
5226 passwd2des NEW: Secure RPC
5228 pow10f NEW: GNU ext.
5229 pow10l NEW: GNU ext.
5232 printf_size NEW: GNU ext.
5233 printf_size_info NEW: GNU ext.
5234 profil_counter REMOVED
5235 pthread_mutexattr_getkind_np REPLACED
5236 pthread_mutexattr_setkind_np REPLACED
5237 ptsname NEW: Unix98 PTY
5238 ptsname_r NEW: Unix98 PTY
5240 putchar_locked REMOVED
5241 putgrent NEW: GNU ext.
5243 putpmsg NEW: STREAMS
5244 pututxline NEW: Unix98
5248 readdir64_r NEW: LFS
5249 remquo NEW: ISO C 9x
5250 remquof NEW: ISO C 9x
5251 remquol NEW: ISO C 9x
5253 roundf NEW: ISO C 9x
5254 roundl NEW: ISO C 9x
5256 scalbln NEW: ISO C 9x
5257 scalblnf NEW: ISO C 9x
5258 scalblnl NEW: ISO C 9x
5260 sendfile NEW: kernel
5261 setcontext NEW: Unix98
5262 setrlimit64 NEW: LFS
5263 setutxent NEW: Unix98
5265 sigignore NEW: Unix98
5266 sigqueue NEW: POSIX.1b
5267 sigrelse NEW: Unix98
5268 sigset NEW: POSIX.1b
5269 sigtimedwait NEW: POSIX.1b
5270 sigwaitinfo NEW: POSIX.1b
5271 sincos NEW: GNU ext.
5272 sincosf NEW: GNU ext.
5273 sincosl NEW: GNU ext.
5277 strcasestr NEW: GNU ext.
5278 strtoimax NEW: ISO C 9x
5279 strtoumax NEW: ISO C 9x
5280 strverscmp NEW: GNU ext.
5281 svcauthdes_stats NEW: Secure RPC
5282 svcunix_create NEW: sunrpc etx
5283 svcunixfd_create NEW: sunrpc ext
5284 swapcontext NEW: Unix98
5285 tcgetsid NEW: Unix98 PTY
5286 tdestroy NEW: GNU ext.
5287 tgamma NEW: ISO C 9x
5288 tgammaf NEW: ISO C 9x
5289 tgammal NEW: ISO C 9x
5293 truncf NEW: ISO C 9x
5294 truncl NEW: ISO C 9x
5296 unlockpt NEW: Unix98 PTY
5297 updwtmpx NEW: Unix98
5298 user2netname NEW: Secure RPC
5299 utmpxname NEW: Unix98
5300 versionsort NEW: GNU ext.
5301 versionsort64 NEW: GNU ext.
5303 wcscasecmp NEW: GNU ext.
5304 wcsncasecmp NEW: GNU ext.
5305 wcsnlen NEW: GNU ext.
5306 wcstoimax NEW: ISO C 9x
5307 wcstoll NEW: ISO C 9x
5308 wcstoull NEW: ISO C 9x
5309 wcstoumax NEW: ISO C 9x
5311 wordexp NEW: POSIX.2
5312 wordfree NEW: POSIX.2
5313 write_profiling REMOVED
5314 xdecrypt NEW: Secure RPC
5315 xdr_authdes_cred NEW: Secure RPC
5316 xdr_authdes_verf NEW: Secure RPC
5317 xdr_cryptkeyarg NEW: Secure RPC
5318 xdr_cryptkeyarg2 NEW: Secure RPC
5319 xdr_cryptkeyres NEW: Secure RPC
5320 xdr_getcredres NEW: Secure RPC
5321 xdr_key_netstarg NEW: Secure RPC
5322 xdr_key_netstres NEW: Secure RPC
5323 xdr_keybuf NEW: Secure RPC
5324 xdr_keystatus NEW: Secure RPC
5325 xdr_netnamestr NEW: Secure RPC
5326 xdr_sizeof NEW: Secure RPC
5327 xdr_unixcred NEW: sunrpc ext
5328 xencrypt NEW: Secure RPC
5329 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5340 * inet_ntoa is thread-safe
5342 * updwtmp is moved from libutil to libc
5344 * rewrite of cbrt function
5346 * update of timezone data
5360 * add atoll function
5362 * fix complex problems in Berkeley DB code
5364 * fix math functions
5368 * fixed lots of header problems (especially Linux/GNU specific)
5370 * dynamic loader preserves all registers
5372 * Roland McGrath provided support for handling of auxiliary objects in
5373 the ELF dynamic loader.
5375 * support for parallel builds is improved
5379 * GNU extensions are no longer declared by default. To enable them you
5380 must define the macro `_GNU_SOURCE' in your program or compile with
5383 * The library has changed from using GNU ld symbol aliases to using weak
5384 symbols where available. The ELF object file format supports weak
5385 symbols; GNU ld also supports weak symbols in the a.out format. (There
5386 is also now support for other GNU ld extensions in ELF. Use the
5387 `--with-elf' option to configure to indicate you have ELF, and
5388 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5389 of many files which contained only symbol aliases, reducing the size of
5390 the source and the compiled library; many other files were renamed to
5391 less cryptic names previously occupied by the symbol alias files.
5392 There is a new header file <elf.h> for programs which operate on
5393 files in the ELF format.
5395 * Converted to Autoconf version 2, so `configure' has more options.
5396 Run `configure --help' to see the details.
5398 * The library can now be configured to build profiling, highly-optimized
5399 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5400 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5401 `configure' enable building these extra libraries. The shared library is
5402 built by default when using both ELF and GNU ld. When shared libraries
5403 are enabled, the new library `-ldl' is available for arbitrary run-time
5404 loading of shared objects; its interface is defined in <dlfcn.h>. The
5405 new header file <link.h> gives access to the internals of the run-time
5406 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5407 application of same name on other systems and it provides information
5408 about dynamically linked binaries.
5410 * The C library now provides the run-time support code for profiling
5411 executables compiled with `-pg'. Programs can control the profiling code
5412 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5413 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5414 the support for this file format was contributed by David Mosberger-Tang.
5416 * The math code has been replaced with a math library based on fdlibm from
5417 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5418 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5419 functions. The math functions now reside in a separate library, so
5420 programs using them will need to use `-lm' their linking commands.
5422 * John C. Bowman contributed optimized ix87 assembler inline functions.
5424 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5425 mechanism similar to that found in Solaris 2. This is now used for the
5426 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5427 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5428 file controls what services are used for each individual database. This
5429 works by loading shared libraries with names specified in `nsswitch.conf',
5430 so service modules can be changed or added at any time without even
5431 relinking any program. Currently there are the file, db, and NIS based
5432 NSS services available.
5434 * The new functions `strtoq' and `strtouq' parse integer values from
5435 strings, like `strtol' and `strtoul', but they return `long long int' and
5436 `unsigned long long int' values, respectively (64-bit quantities).
5438 * The new functions `strtof' and `strtold' parse floating-point values from
5439 strings, like `strtod', but they return `float' and `long double' values,
5440 respectively (on some machines `double' and `long double' are the same).
5442 * Ulrich Drepper has contributed new implementations of the floating-point
5443 printing and reading code used in the `printf' family of functions and
5444 `strtod', `strtof', and `strtold'. These new functions are perfectly
5445 accurate, and much faster than the old ones.
5447 * The implementation of the POSIX locale model was completely rewritten by
5448 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5449 to compile the POSIX locale definition.
5451 * The former dummy implementations of the strcoll and strxfrm function are
5452 now replaced by fully functional code contributed by Ulrich Drepper. The
5453 collation information comes from the POSIX locale definitions.
5455 * The new header <langinfo.h> defines an interface for accessing
5456 various locale-dependent data (using the locale chosen with `setlocale').
5458 * Ulrich Drepper has contributed a new suite of functions for operation on
5459 wide-character and multibyte-character strings, in <wchar.h>;
5460 and classification and case conversion of wide characters, in <wctype.h>.
5461 These new functions are conforming to the ISO C, Amendement 1 specification.
5463 * There is now a second implementation of the standard I/O library available.
5464 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5465 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5467 * You can now use positional parameter specifications in format strings
5468 for the `printf' and `scanf' families of functions. For example,
5469 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5470 ``Number 6, Mr Jones''. This is mainly useful when providing different
5471 format strings for different languages, whose grammars may dictate
5472 different orderings of the values being printed. To support this
5473 feature, the interface for `register_printf_handler' has changed; see
5474 the header file <printf.h> for details.
5476 * The `printf' and `scanf' families of functions now understand a new
5477 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5478 to group numbers as indicated by the locale; for `scanf' and friends, this
5479 says to accept as valid only a number with all the proper grouping
5480 separators in the right places. In the default "C" locale, numbers are
5481 not grouped; but locales for specific countries will define the usual
5482 conventions (i.e. separate thousands with `,' in the US locale).
5484 * The pgrp functions have been regularized, slightly incompatibly but much
5485 less confusingly. The core functions are now `getpgid' and `setpgid',
5486 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5487 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5488 provided for compatibility. There is no longer an incompatible `getpgrp'
5489 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5491 * The new header file <fts.h> and suite of functions simplify programs that
5492 operate on directory trees. This code comes from 4.4 BSD.
5494 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5495 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5496 NSS scheme used in glibc.
5498 * There is a new malloc debugging hook `__memalign_hook'.
5500 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5501 `unsigned int' in <sys/types.h>. These are for compatibility only and
5502 their use is discouraged.
5504 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5505 done differently, so that it works even without GNU ld.
5507 * New function `euidaccess' checks allowed access to a file like `access',
5508 but using the effective IDs instead of the real IDs.
5510 * The time zone data files have been updated for the latest and greatest
5511 local time conventions of the countries of the world.
5513 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5516 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5517 for formatting floating-point numbers. They are provided only for
5518 compatibility; new programs should use `sprintf' instead. There are
5519 also equivalent function for the `long double' floating-point type and
5520 all functions also exist in a reentrant form.
5522 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5523 functions for maintaining the login-record files (primarily of use to
5524 system programs such as `login'), and convenient functions for
5525 allocating and initializing a pseudo-terminal (pty) device.
5527 * Ulrich Drepper has contributed new support for System V style
5528 shared memory and IPC on systems that support it.
5530 * Ulrich Drepper has contributed several miscellaneous new functions found
5531 in System V: The `hsearch' family of functions provide an effective
5532 implementation of hash tables; `a64l' and `l64a' provide a very simple
5533 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5536 * Ulrich Drepper has contributed new reentrant counterparts for the
5537 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5539 * Ulrich Drepper has contributed new, highly-optimized versions of several
5540 string functions for the i486/Pentium family of processors.
5542 * Ulrich Drepper has updated the Linux-specific code, based largely
5543 on work done in Hongjiu Lu's version of GNU libc for Linux.
5544 The GNU library now supports Linux versions 2.0.10 and later,
5545 using the ELF object file format (i[3456]86-*-linux).
5547 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5549 * David Mosberger-Tang and Richard Henderson have ported the C library
5550 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5551 dynamic linking support for ELF/Alpha.
5553 * Richard Henderson contributed several Alpha optimized assembler function
5554 for arithmetic and string handling.
5556 * Ulrich Drepper has contributed a new set of message catalog functions to
5557 support multiple languages using the <libintl.h> interface, for use with
5558 his new package GNU gettext. Translation volunteers have contributed
5559 catalogs of the library's messages in Spanish, German, and Korean.
5561 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5562 program and the `catgets' function for reading the catalog files it
5563 creates. (The <libintl.h> interface is preferred; we include the
5564 <nl_types.h> interface using `catgets' only for source compatibility with
5565 programs already written to use it.)
5567 * New header file <values.h> gives SVID-compatible names for <limits.h>
5570 * Various new macros, declarations, and small header files for compatibility
5573 * New function `group_member' is a convenient way to check if a process has
5574 a given effective group ID.
5576 * When using GCC 2.7 and later, the socket functions are now declared in a
5577 special way so that passing an argument of type `struct sockaddr_in *',
5578 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5579 `struct sockaddr *' type, does not generate a type-clash warning.
5581 * New function `error' declared in header file <error.h> is a convenient
5582 function for printing error messages and optionally exiting; this is the
5583 canonical function used in GNU programs. The new functions `err', `warn',
5584 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5585 doing the same thing.
5587 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5588 POSIX.2 `glob' function to do ~ and {...} expansion.
5590 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5591 `clearenv' which is used in POSIX.9 is also available.
5593 * New function `getsid' returns session ID number on systems that support it.
5595 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5596 files <db.h> and <mpool.h> provide a rich set of functions for several
5597 types of simple databases stored in memory and in files, and <ndbm.h> is
5598 an old `ndbm'-compatible interface using the `db' functions. Link with
5599 `-ldb' to get these functions.
5601 * New macro `strdupa' copies a string like `strdup', but uses local stack
5602 space from `alloca' instead of dynamic heap space from `malloc'.
5604 * New function `strnlen' is like `strlen' but searches only a given maximum
5605 number of characters for the null terminator. `stpncpy', `strndup' and
5606 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5609 * New function `statfs' in header <sys/statfs.h>.
5611 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5612 provide convenient functions for operating on blocks of null-terminated
5615 * A new suite of functions in <utmp.h> handle all the details of reading
5616 and writing the utmp file.
5618 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5621 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5622 completely POSIX compliant and also implemented the extended functionality
5623 to handle alternate digit representation and alternate era date formats.
5625 * Ulrich Drepper provided an implementation of the `strptime' function
5626 defined in XPG4.2 which transforms a string into a `struct tm' value.
5628 * Paul Eggert provided the tzselect shell script as part of the timezone
5629 code. The shell script makes it easy to select the correct timezone
5632 * The implementation of the malloc family of functions is completely replaced
5633 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5634 The implementation uses the mmap function (if available) and it is
5635 optimized for the use in multi threaded programs.
5637 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5638 functions. This new functionality is usable by specifying a special
5639 salt string and it is compatible with implementation on *BSD systems.
5641 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5642 `getsubopt' to handle second level command line options, `bsd_signal'
5643 to access BSD style `signal' functionality, the obsolete `regexp' style
5646 * the `lchown' function is available on system which support this
5649 * The implementation of the shadow password handling function was contributed
5652 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5654 * POSIX.1g support was added. The <sys/select.h> header is available,
5655 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5656 implementation of `getaddrinfo'.
5660 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5662 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5663 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5665 * The new function `daemon' from 4.4 BSD is useful for server programs that
5666 want to put themselves in the background.
5668 * Joel Sherrill has contributed support for several standalone boards that
5669 run without an operating system.
5671 * `printf', `scanf' and friends now accept a `q' type modifier for long
5672 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5674 * All of the code taken from BSD (notably most of the math and networking
5675 routines) has been updated from the BSD 4.4-Lite release.
5677 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5679 * The new functions `getdomainname' and `setdomainname' fetch or change the
5680 YP/NIS domain name. These are system calls which exist on systems which
5683 * The time zone data files have been updated for the latest international
5686 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5687 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5691 * The C library now includes support for Sun RPC, from Sun's free
5692 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5693 are included. (There is still no support for YP.)
5695 * Tom Quinn has contributed a port of the C library to SGI machines running
5696 Irix 4 (mips-sgi-irix4).
5698 * The new `lockf' function is a simplified interface to the locking
5699 facilities of `fcntl', included for compatibility.
5701 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5703 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5705 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5708 * The error message printed by `assert' for a failed assertion now includes
5709 the name of the program (if using GNU ld) and the name of the calling
5710 function (with versions of GCC that support this).
5712 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5714 * The library now includes the <sys/mman.h> header file and memory
5715 management functions `mmap', `munmap', `mprotect', `msync', and
5716 `madvise', on systems that support those facilities.
5718 * The interface for `mcheck' has changed slightly: the function called to
5719 abort the program when an allocation inconsistency is detected now takes
5720 an argument that indicates the type of failure. The new function
5721 `mprobe' lets you request a consistency check for a particular block at
5722 any time (checks are normally done only when you call `free' or `realloc'
5725 * It is now possible to easily cross-compile the C library, building on one
5726 system a library to run on another machine and/or operating system. All
5727 you need to do is set the variable `HOST_CC' in `configparms' to the
5728 native compiler for programs to run on the machine you are building on (a
5729 few generator programs are used on Unix systems); set `CC' to the
5732 * The new function `fexecve' (only implemented on the GNU system) executes
5733 a program file given a file descriptor already open on the file.
5737 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5738 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5740 * You can set the variable `libprefix' in `configparms' to specify a prefix
5741 to be prepended to installed library files; this makes it easy to install
5742 the GNU C library to be linked as `-lgnuc' or whatever.
5744 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5745 copies a limited number of characters from a string, and returns the
5746 address of the last character written.
5748 * You no longer need to check for whether the installed `stddef.h' is
5749 compatible with the GNU C library. configure now checks for you.
5751 * You can now define a per-stream `fileno' function to convert the
5752 stream's cookie into an integral file descriptor.
5754 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5755 allocates zero bytes of storage, and returns a unique pointer which
5756 you can pass to `realloc' or `free'. The behavior is undefined if
5757 you dereference this pointer.
5759 * The C library now runs on Sony NEWS m68k machines running either
5760 NewsOS 3 or NewsOS 4.
5762 * The new `syscall' function is a system-dependent primitive function
5763 for invoking system calls. It has the canonical behavior on Unix
5764 systems, including unreliable return values for some calls (such as
5765 `pipe', `fork' and `getppid').
5767 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5768 to `EAGAIN', which is the preferred name. On systems whose kernels
5769 use two distinct codes, the C library now translates EWOULDBLOCK to
5770 EAGAIN in every system call function.
5774 * The GNU C Library Reference Manual is now distributed with the library.
5775 `make dvi' will produce a DVI file of the printed manual.
5776 `make info' will produce Info files that you can read on line using C-h i
5777 in Emacs or the `info' program.
5778 Please send comments on the manual to bug-glibc-manual@gnu.org.
5780 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5782 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5784 * Jason Merrill has contributed a port to the Sequent Symmetry running
5785 Dynix version 3 (i386-sequent-dynix).
5787 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5788 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5790 * New function `memory_warnings' lets you arrange to get warnings when
5791 malloc is running out of memory to allocate, like Emacs gives you.
5793 * The C library now contains the relocating allocator used in Emacs 19 for
5794 its editing buffers. This allocator (ralloc) minimizes allocation
5795 overhead and fragmentation by moving allocated regions around whenever it
5796 needs to. You always refer to a ralloc'd region with a "handle" (a
5797 pointer to a pointer--an object of type `void **').
5799 * There is a new `printf' format: `%m' gives you the string corresponding
5800 to the error code in `errno'.
5802 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5803 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5804 pass, the `a' modifier says to fill in a `char **' you pass with a
5807 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5808 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5809 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5811 * `mkstemp' is a traditional Unix function to atomically create and open a
5812 uniquely-named temporary file.
5816 * The standard location for the file that says what the local timezone is
5817 has changed again. It is now `/usr/local/etc/localtime' (or more
5818 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5820 * The distribution no longer contains any files with names longer than 14
5823 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5824 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5826 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5830 * The configuration process has changed quite a bit. The `configure'
5831 script is now used just like the configuration scripts for other GNU
5832 packages. The `sysdeps' directory hierarchy is much rearranged.
5833 The file `INSTALL' explains the new scheme in detail.
5835 * The header files no longer need to be processed into ANSI C and
5836 traditional C versions. There is just one set of files to install, and
5837 it will work with ANSI or old C compilers (including `gcc -traditional').
5839 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5840 MIPS DECStation running Ultrix 4.
5842 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5843 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5844 made itself into a shared library.
5846 * Yet further improved support for the i386, running 4.3 BSD-like systems
5847 (such as Mach 3 with the Unix single-server), or System V.
5849 * New function `strncasecmp' to do case-insensitive string comparison
5850 with limited length.
5852 * New function `strsep' is a reentrant alternative to `strtok'.
5854 * New functions `scandir' and `alphasort' for searching directories.
5856 * New function `setenv' is a better interface to `putenv'.
5858 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5859 function for traversing a directory tree.
5861 * The GNU obstack package is now also part of the C library.
5862 The new function `open_obstack_stream' creates a stdio stream that
5863 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5864 formatted output directly to an obstack.
5866 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5867 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5869 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5871 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5872 things to your strings.
5874 * There are some new test programs: test-fseek, testmb, and testrand.
5876 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5877 These ports are not finished, but are a good starting place for really
5878 supporting those systems.
5880 * `/etc/localtime' is now the standard location for the file that says what
5881 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5882 This follows the general principle that `/etc' is the place for all local
5883 configuration files.
5885 * The C library header files now use `extern "C"' when used by the C++
5886 compiler, so the C library should now work with C++ code.
5888 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5889 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5892 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5893 function which uses the `merge sort' algorithm, and is said to be
5894 significantly faster than the old GNU `qsort' function. Merge sort is
5895 now the standard `qsort' function. The new algorithm can require a lot
5896 of temporary storage; so, the old sorting function is called when the
5897 required storage is not available.
5899 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5900 provides the Unix `crypt' function, plus some other entry points.
5902 * The code and header files taken from 4.4 BSD have been updated with the
5903 latest files released from Berkeley.
5905 ----------------------------------------------------------------------
5906 Copyright information:
5908 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5910 Permission is granted to anyone to make or distribute verbatim copies
5911 of this document as received, in any medium, provided that the
5912 copyright notice and this permission notice are preserved,
5913 thus giving the recipient permission to redistribute in turn.
5915 Permission is granted to distribute modified versions
5916 of this document, or of portions of it,
5917 under the above conditions, provided also that they
5918 carry prominent notices stating who last changed them.
5921 version-control: never