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 Deprecated and removed features, and other changes affecting compatibility:
28 * The deprecated <sys/sysctl.h> header and the sysctl function have been
29 removed. To support old binaries, the sysctl function continues to
30 exist as a compatibility symbol (on those architectures which had it),
31 but always fails with ENOSYS. This reflects the removal of the system
32 call from all architectures, starting with Linux 5.5.
34 * The sstk function is no longer available to newly linked binaries.
35 Its implementation always returned with a failure, and the function
36 was not declared in any header file.
38 Changes to build and runtime requirements:
40 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
41 long double redirects.
43 Security related changes:
45 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
46 corruption when they were passed a pseudo-zero argument. Reported by Guido
47 Vranken / ForAllSecure Mayhem.
49 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
50 out-of-bounds write when executed in a signal frame context.
52 CVE-2020-1752: A use-after-free vulnerability in the glob function when
53 expanding ~user has been fixed.
55 The following bugs are resolved with this release:
57 [The release manager will add the list generated by
58 scripts/list-fixed-bugs.py just before the release.]
64 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
65 enable features from the draft ISO C2X standard. Only some features from
66 this draft standard are supported by the GNU C Library, and as the draft
67 is under active development, the set of features enabled by this macro is
68 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
69 by compiling with "gcc -std=gnu2x".
71 * The <math.h> functions that round their results to a narrower type now
72 have corresponding type-generic macros in <tgmath.h>, as defined in TS
73 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
74 Clarification Request 13 to TS 18661-3.
76 * The function pthread_clockjoin_np has been added, enabling join with a
77 terminated thread with a specific clock. It allows waiting against
78 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
80 * New locale added: mnw_MM (Mon language spoken in Myanmar).
82 * The DNS stub resolver will optionally send the AD (authenticated data) bit
83 in queries if the trust-ad option is set via the options directive in
84 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
85 mode, the AD bit, as provided by the name server, is available to
86 applications which call res_search and related functions. In the default
87 mode, the AD bit is not set in queries, and it is automatically cleared in
88 responses, indicating a lack of DNSSEC validation. (Therefore, the name
89 servers and the network path to them are treated as untrusted.)
91 Deprecated and removed features, and other changes affecting compatibility:
93 * The totalorder and totalordermag functions, and the corresponding
94 functions for other floating-point types, now take pointer arguments to
95 avoid signaling NaNs possibly being converted to quiet NaNs in argument
96 passing. This is in accordance with the resolution of Clarification
97 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
98 floating-point arguments directly will continue to work.
100 * The obsolete function stime is no longer available to newly linked
101 binaries, and its declaration has been removed from <time.h>.
102 Programs that set the system time should use clock_settime instead.
104 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
105 in a future version of glibc. In this release, the header still exists
106 but calling ftime will cause a compiler warning. All programs should use
107 gettimeofday or clock_gettime instead.
109 * The gettimeofday function no longer reports information about a
110 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
111 many years, as it cannot handle the full complexity of the world's
112 timezones, but hitherto we have supported it on a best-effort basis.
113 Changes required to support 64-bit time_t on 32-bit architectures have
114 made this no longer practical.
116 As of this release, callers of gettimeofday with a non-null 'tzp' argument
117 should expect to receive a 'struct timezone' whose tz_minuteswest and
118 tz_dsttime fields are zero. (For efficiency reasons, this does not always
119 happen on a few Linux-based ports. This will be corrected in a future
122 All callers should supply a null pointer for the 'tzp' argument to
123 gettimeofday. For accurate information about the time zone associated
124 with the current time, use the localtime function.
126 gettimeofday itself is obsolescent according to POSIX. We have no plans
127 to remove access to this function, but portable programs should consider
128 using clock_gettime instead.
130 * The settimeofday function can still be used to set a system-wide time
131 zone when the operating system supports it. This is because the Linux
132 kernel reused the API, on some architectures, to describe a system-wide
133 time-zone-like offset between the software clock maintained by the kernel,
134 and the "RTC" clock that keeps time when the system is shut down.
136 However, to reduce the odds of this offset being set by accident,
137 settimeofday can no longer be used to set the time and the offset
138 simultaneously. If both of its two arguments are non-null, the call
139 will fail (setting errno to EINVAL).
141 Callers attempting to set this offset should also be prepared for the call
142 to fail and set errno to ENOSYS; this already happens on the Hurd and on
143 some Linux architectures. The Linux kernel maintainers are discussing a
144 more principled replacement for the reused API. After a replacement
145 becomes available, we will change settimeofday to fail with ENOSYS on all
146 platforms when its 'tzp' argument is not a null pointer.
148 settimeofday itself is obsolescent according to POSIX. Programs that set
149 the system time should use clock_settime and/or the adjtime family of
150 functions instead. We may cease to make settimeofday available to newly
151 linked binaries after there is a replacement for Linux's time-zone-like
154 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
155 the optional CAS instruction is implemented (for instance, LEON processors
156 are still supported, but SuperSPARC processors are not).
158 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
161 * If a lazy binding failure happens during dlopen, during the execution of
162 an ELF constructor, the process is now terminated. Previously, the
163 dynamic loader would return NULL from dlopen, with the lazy binding error
164 captured in a dlerror message. In general, this is unsafe because
165 resetting the stack in an arbitrary function call is not possible.
167 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
168 executable stack unless explicitly configured at build time to require
169 minimum kernel version 4.8 or newer. This is because executing
170 floating-point branches on a non-executable stack on Linux kernels prior to
171 4.8 can lead to application crashes for some MIPS configurations. While
172 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
173 expected to enable non-executable stack by default with PT_GNU_STACK by
174 default and is thus likely to trigger a crash on older kernels.
176 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
177 non-executable stack while dropping support for older kernels.
179 * System call wrappers for time system calls now use the new time64 system
180 calls when available. On 32-bit targets, these wrappers attempt to call
181 the new system calls first and fall back to the older 32-bit time system
182 calls if they are not present. This may cause issues in environments
183 that cannot handle unsupported system calls gracefully by returning
184 -ENOSYS. Seccomp sandboxes are affected by this issue.
186 Changes to build and runtime requirements:
188 * It is no longer necessary to have recent Linux kernel headers to build
189 working (non-stub) system call wrappers on all architectures except 64-bit
190 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
192 * The ChangeLog file is no longer present in the toplevel directory of the
193 source tree. ChangeLog files are located in the ChangeLog.old directory as
194 ChangeLog.N where the highest N has the latest entries.
196 Security related changes:
198 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
199 environment variable during program execution after a security
200 transition, allowing local attackers to restrict the possible mapping
201 addresses for loaded libraries and thus bypass ASLR for a setuid
202 program. Reported by Marcin KoĆcielnicki.
204 The following bugs are resolved with this release:
206 [12031] localedata: iconv -t ascii//translit with Greek characters
207 [15813] libc: Multiple issues in __gen_tempname
208 [17726] libc: [arm, sparc] profil_counter should be compat symbol
209 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
210 [19767] libc: vdso is not used with static linking
211 [19903] hurd: Shared mappings not being inherited by children processes
212 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
213 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
215 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
216 Symbols-A/B Unicode blocks
217 [23518] libc: Eliminate __libc_utmp_jump_table
218 [24026] malloc: malloc_info() returns wrong numbers
219 [24054] localedata: Many locales are missing date_fmt
220 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
221 [24304] dynamic-link: Lazy binding failure during ELF
222 constructors/destructors is not fatal
223 [24376] libc: RISC-V symbol size confusion with _start
224 [24682] localedata: zh_CN first weekday should be Monday per GB/T
226 [24824] libc: test-in-container does not install charmap files compatible
228 [24844] regex: regex bad pointer / leakage if malloc fails
229 [24867] malloc: Unintended malloc_info formatting changes
230 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
231 [24880] libc: login: utmp implementation uses struct flock with fcntl64
232 [24882] libc: login: pututline uses potentially outdated cache
233 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
234 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
236 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
238 [24930] dynamic-link: dlopen of PIE executable can result in
239 _dl_allocate_tls_init assertion failure
240 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
241 (stringop-overflow error)
242 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
243 functions other can lead to crashes
244 [24967] libc: jemalloc static linking causes runtime failure
245 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
247 [25035] libc: sbrk() failure handled poorly in tunables_strdup
248 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
249 [25097] libc: new -Warray-bounds with GCC 10
250 [25112] dynamic-link: dlopen must not make new objects accessible when it
251 still can fail with an error
252 [25139] localedata: Please add the new mnw_MM locale
253 [25149] regex: Array bounds violation in proceed_next_node
254 [25157] dynamic-link: Audit cookie for the dynamic loader is not
255 initialized correctly
256 [25189] libc: glibc's __glibc_has_include causes issues with clang
258 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
260 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
261 binaries (CVE-2019-19126)
262 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
264 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
266 [25232] string: <string.h> does not enable const correctness for strchr et
268 [25233] localedata: Consider "." as the thousands separator for sl_SI
270 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
271 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
272 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
274 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
275 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
277 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
278 (dl_initfirst) link map pointer
279 [25401] malloc: pvalloc must not have __attribute_alloc_size__
280 [25423] libc: Array overflow in backtrace on powerpc
281 [25425] network: Missing call to __resolv_context_put in
282 getaddrinfo.c:gethosts
289 * Unicode 12.1.0 Support: Character encoding, character type info, and
290 transliteration tables are all updated to Unicode 12.1.0, using
291 generator scripts contributed by Mike FABIAN (Red Hat).
293 * The dynamic linker accepts the --preload argument to preload shared
294 objects, in addition to the LD_PRELOAD environment variable.
296 * The twalk_r function has been added. It is similar to the existing
297 twalk function, but it passes an additional caller-supplied argument
298 to the callback function.
300 * On Linux, the getdents64, gettid, and tgkill functions have been added.
302 * Minguo (Republic of China) calendar support has been added as an
303 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
306 * The entry for the new Japanese era has been added for ja_JP locale.
308 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
309 pvalloc, memalign, and posix_memalign fail now with total object size
310 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
311 pointer subtraction within the allocated object, where results might
312 overflow the ptrdiff_t type.
314 * The dynamic linker no longer refuses to load objects which reference
315 versioned symbols whose implementation has moved to a different soname
316 since the object has been linked. The old error message, symbol
317 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
318 link time reference, is gone.
320 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
321 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
322 functions. These behave similarly to their "timed" equivalents, but also
323 accept a clockid_t parameter to determine which clock their timeout should
324 be measured against. All functions allow waiting against CLOCK_MONOTONIC
325 and CLOCK_REALTIME. The decision of which clock to be used is made at the
326 time of the wait (unlike with pthread_condattr_setclock, which requires
327 the clock choice at initialization time).
329 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
330 work, new resolvers can use a second argument which can be extended in
331 the future, currently it contains the AT_HWCAP2 value.
333 Deprecated and removed features, and other changes affecting compatibility:
335 * The copy_file_range function fails with ENOSYS if the kernel does not
336 support the system call of the same name. Previously, user space
337 emulation was performed, but its behavior did not match the kernel
338 behavior, which was deemed too confusing. Applications which use the
339 copy_file_range function can no longer rely on glibc to provide a fallback
340 on kernels that do not support the copy_file_range system call, and if
341 this function returns ENOSYS, they will need to use their own fallback.
342 Support for copy_file_range for most architectures was added in version
343 4.5 of the mainline Linux kernel.
345 * The functions clock_gettime, clock_getres, clock_settime,
346 clock_getcpuclockid, clock_nanosleep were removed from the librt library
347 for new applications (on architectures which had them). Instead, the
348 definitions in libc will be used automatically, which have been available
351 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
352 and <sys/stropts.h> have been removed.
354 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
355 resolver flag (deprecated in glibc 2.25) have been removed.
357 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
358 resolver have been removed from <resolv.h>.
360 * With --enable-bind-now, installed programs are now linked with the
363 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
364 configurations) has been removed, following the deprecation of this
365 subarchitecture in version 8 of GCC, and its removal in version 9.
367 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
368 header have been removed.
370 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
371 deprecated and will be removed from a future version of glibc.
372 Application should directly access /proc instead. For obtaining random
373 bits, the getentropy function can be used.
375 Changes to build and runtime requirements:
377 * GCC 6.2 or later is required to build the GNU C Library.
379 Older GCC versions and non-GNU compilers are still supported when
380 compiling programs that use the GNU C Library.
382 Security related changes:
384 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
385 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
386 has undefined behavior. On x32, the size_t argument may be passed
387 in the lower 32 bits of the 64-bit RDX register with non-zero upper
388 32 bits. When it happened with the sign bit of RDX register set,
389 memcmp gave the wrong result since it treated the size argument as
390 zero. Reported by H.J. Lu.
392 CVE-2019-9169: Attempted case-insensitive regular-expression match
393 via proceed_next_node in posix/regexec.c leads to heap-based buffer
394 over-read. Reported by Hongxu Chen.
396 The following bugs are resolved with this release:
398 [2872] locale: Transliteration Cyrillic -> ASCII fails
399 [6399] libc: gettid() should have a wrapper
400 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
401 [16976] glob: fnmatch unbounded stack VLA for collating symbols
402 [17396] localedata: globbing for locale by [[.collating-element.]]
403 [18035] dynamic-link: pldd does no longer work, enters infinite loop
404 [18465] malloc: memusagestat is built using system C library
405 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
406 invalid input drops valid char
407 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
408 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
409 [21897] localedata: Afar locales: Fix mon, abmon, and abday
410 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
411 [23352] malloc: __malloc_check_init still defined in public header
413 [23403] nptl: Wrong alignment of TLS variables
414 [23501] libc: nftw() doesn't return dangling symlink's inode
415 [23733] malloc: Check the count before calling tcache_get()
416 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
418 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
419 [23844] nptl: pthread_rwlock_trywrlock results in hang
420 [23983] argparse: Missing compat versions of argp_failure and argp_error
421 for long double = double
422 [23984] libc: Missing compat versions of err.h and error.h functions for
424 [23996] localedata: Dutch salutations
425 [24040] libc: riscv64: unterminated call chain in __thread_start
426 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
428 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
429 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
431 [24114] regex: regexec buffer read overrun in "grep -i
432 '\(\(\)*.\)*\(\)\(\)\1'"
433 [24122] libc: Segfaults if 0 returned from la_version
434 [24153] stdio: Some input functions do not react to stdin assignment
435 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
436 RDX is set) (CVE-2019-7309)
437 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
438 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
439 not the default "nor"
440 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
441 false positives, change to modern flexible array
442 [24180] nptl: pthread_mutex_trylock does not use the correct order of
443 instructions while maintaining the robust mutex list due to missing
445 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
446 unnecessary librt dependencies
447 [24200] localedata: Revert first_weekday removal in en_IE locale
448 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
449 [24215] nptl: pthread_timedjoin_np should be a cancellation point
450 [24216] malloc: Check for large bin list corruption when inserting
452 [24228] stdio: old x86 applications that use legacy libio crash on exit
453 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
455 [24293] localedata: Missing Minguo calendar support for TW locales
456 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
458 [24307] localedata: Update locale data to Unicode 12.0.0
459 [24323] dynamic-link: dlopen should not be able open PIE objects
460 [24335] build: "Obsolete types detected" with Linux 5.0 headers
461 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
463 [24370] localedata: Add lang_name for tt_RU locale
464 [24372] locale: Binary locale files are not architecture independent
465 [24394] time: strptime %Ey mis-parses final year of era
466 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
468 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
470 [24531] malloc: Malloc tunables give tcache assertion failures
471 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
473 [24535] localedata: Update locale data to Unicode 12.1.0
474 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
475 kernels and break testing
476 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
477 [24556] build: [GCC 9] error: â%sâ directive argument is null
478 [-Werror=format-overflow=]
479 [24570] libc: alpha: compat msgctl uses __IPC_64
480 [24584] locale: Data race in __wcsmbs_clone_conv
481 [24588] stdio: Remove codecvt vtables from libio
482 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
484 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
485 [24632] stdio: Old binaries which use freopen with default stdio handles
487 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
489 [24652] localedata: szl_PL spelling correction
490 [24695] nss: nss_db: calling getpwent after endpwent crashes
491 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
492 in /etc/nsswitch.conf
493 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
494 [24740] libc: getdents64 type confusion
495 [24741] dynamic-link: ld.so should not require that a versioned symbol is
496 always implemented in the same library
497 [24744] libc: Remove copy_file_range emulation
498 [24757] malloc: memusagestat is linked against system libpthread
499 [24794] libc: Partial test suite run builds corrupt test-in-container
507 * The getcpu wrapper function has been added, which returns the currently
508 used CPU and NUMA node. This function is Linux-specific.
510 * A new convenience target has been added for distribution maintainers
511 to build and install all locales as directories with files. The new
512 target is run by issuing the following command in your build tree:
513 'make localedata/install-locale-files', with an optional DESTDIR
514 to set the install root if you wish to install into a non-default
517 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
519 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
520 for _GNU_SOURCE, to match BSD environments.
522 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
523 indicates that it will abort the transaction prior to entering the kernel
524 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
525 suspended, and this caused some undefined side-effects issues by aborting
526 transactions manually. Glibc avoided it by abort transactions manually on
527 each syscall, but it lead to performance issues on newer kernels where the
528 HTM state is saved and restore lazily (the state being saved even when the
529 process actually does not use HTM).
531 * The functions posix_spawn_file_actions_addchdir_np and
532 posix_spawn_file_actions_addfchdir_np have been added, enabling
533 posix_spawn and posix_spawnp to run the new process in a different
534 directory. These functions are GNU extensions. The function
535 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
538 * The popen and system do not run atfork handlers anymore (BZ#17490).
539 Although it is a possible POSIX violation, the POSIX rationale in
540 pthread_atfork documentation regarding atfork handlers is to handle
541 inconsistent mutex state after a fork call in a multi-threaded process.
542 In both popen and system there is no direct access to user-defined mutexes.
544 * Support for the C-SKY ABIV2 running on Linux has been added. This port
545 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
547 - C-SKY ABIV2 soft-float little-endian
548 - C-SKY ABIV2 hard-float little-endian
550 * strftime's default formatting of a locale's alternative year (%Ey)
551 has been changed to zero-pad the year to a minimum of two digits,
552 like "%y". This improves the display of Japanese era years during
553 the first nine years of a new era, and is expected to be harmless
554 for all other locales (only Japanese locales regularly have
555 alternative year numbers less than 10). Zero-padding can be
556 overridden with the '_' or '-' flags (which are GNU extensions).
558 * As a GNU extension, the '_' and '-' flags can now be applied to
559 "%EY" to control how the year number is formatted; they have the
560 same effect that they would on "%Ey".
562 Deprecated and removed features, and other changes affecting compatibility:
564 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
565 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
567 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
568 in <sys/procfs.h>, has been corrected to match the type actually used by
569 the Linux kernel. This affects the size and layout of that structure on
570 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
572 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
573 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
574 defined in <sys/procfs.h>, has been corrected to match the type actually
575 used by the Linux kernel. This affects the size and layout of those
578 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
579 meant to scan a string and allocate space for it with malloc, is now
580 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
581 defined. This extension conflicts with C99's use of '%a' to scan a
582 hexadecimal floating-point number, which is now available to programs
583 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
585 POSIX.1-2008 includes the feature of allocating a buffer for string input
586 with malloc, using the modifier letter 'm' instead. Programs using
587 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
588 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
589 C99 '%a' no longer need to avoid _GNU_SOURCE.
591 GCC's -Wformat warnings can detect most uses of this extension, as long
592 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
593 __attribute__ ((format (scanf, ...))).
595 Changes to build and runtime requirements:
597 * Python 3.4 or later is required to build the GNU C Library.
599 * On most architectures, GCC 5 or later is required to build the GNU C
600 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
602 Older GCC versions and non-GNU compilers are still supported when
603 compiling programs that use the GNU C Library.
605 Security related changes:
607 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
608 denial of service due to resource exhaustion when processing getaddrinfo
609 calls with crafted host names. Reported by Guido Vranken.
611 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
612 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
613 happened, accessing the 32-bit size_t value as the full 64-bit register
614 in the assembly string/memory functions would cause a buffer overflow.
617 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
618 addresses with arbitrary trailing characters, potentially leading to data
619 or command injection issues in applications.
621 The following bugs are resolved with this release:
623 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
624 [10496] localedata: 12h time representation in multiple locales faulty
625 [10797] localedata: it_IT locale numeric does not have a separator for
627 [11319] libc: dprintf doesn't handle errors properly
628 [16346] time: mktime: potentially unsafe use of localtime_offset
629 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
631 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
632 posix_spawn_file_actions_addfchdir_np
633 [17426] localedata: Indian locales: set the correct date format
634 [17490] stdio: popen should not invoke atfork handlers
635 [17783] libc: TIOCSER_TEMT conditions inconsistent
636 [18040] regex: use-after-free in regexec/get_subexp
637 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
638 [20018] network: getaddrinfo should reject IP addresses with trailing
639 characters (CVE-2016-10739)
640 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
641 [20271] libc: Missing "\n" in __libc_fatal calls
642 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
643 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
644 pointer argument is non-NULL
645 [21037] stdio: open_memstream and freopen
646 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
647 [21716] time: Crash in glibc's mktime in low-memory situations
648 [22834] stdio: Subprocess forked by popen may crash in Linux when
649 multithreads call popen
650 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
651 and pthread_create fails.
652 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
653 [23125] libc: riscv64: endless loop when throwing an exception from a
655 [23275] nptl: Race in pthread_mutex_lock while promoting to
656 PTHREAD_MUTEX_ELISION_NP.
657 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
659 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
661 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
663 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
664 [23509] dynamic-link: CET enabled glibc is incompatible with the older
666 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
667 [23521] nss: get_next_alias nss_files file stream leak
668 [23538] nptl: Hang in pthread_cond_broadcast
669 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
670 [23578] regex: Invalid memory access if regex pattern contains NUL byte
671 [23579] libc: Errors misreported in preadv2
672 [23597] build: support/test-container.c doesn't work with different
674 [23603] time: mktime signed integer overflow on large timestamps
675 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
676 [23614] libc: powerpc: missing CFI register information in __mpn_*
678 [23637] string: Generic strstr/strcasestr fails with huge needles
679 [23640] libc: no way to easily clear FD_CLOEXEC in
680 posix_spawn_file_actions_adddup2()
681 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
683 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
685 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
686 [23689] libc: Bug in documentation for rusage.ru_ixrss in
687 bits/types/struct_rusage.h
688 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
690 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
692 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
693 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
694 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
696 [23724] localedata: Albanian date formats are incorrect
697 [23735] math: libnldbl_nonshared.a references internal libm symbols
698 [23740] localedata: kl_GL: Month names and date formats need update
699 [23744] regex: regex refactorings to remove BE, avoid duplication
700 [23745] time: mktime fix for Gnulib + coreutils
701 [23758] time: Improve the width of alternate representation for year in
703 [23783] libc: [mips] Missing CMSPAR bits/termios.h
704 [23789] time: mktime does not set errno on failure
705 [23791] localedata: Wrong monetary format for ca_ES locale
706 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
707 [23794] locale: c16rtomb does not handle surrogate pairs
708 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
709 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
710 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
711 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
712 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
713 [23862] libc: [sh] missing kernel-features.h undefines
714 [23864] libc: [riscv] missing kernel-features.h undefines
715 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
716 [23907] malloc: Incorrect double-free malloc tcache check disregards
718 [23913] libc: off-by-one in function maybe_script_execute in
719 sysdeps/posix/spawni.c
720 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
721 [23923] locale: Add --no-hard-links option to localedef
722 [23927] network: Linux if_nametoindex() does not close descriptor
724 [23961] math: powf can overflow to inf without setting errno in non-
725 nearest rounding mode
726 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
727 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
728 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
729 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
730 [24011] localedata: Fixed small type in comment for locale bs_BA
731 [24018] libc: gettext() may return NULL
732 [24022] build: riscv build failure with Linux kernel 4.20-rc7
733 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
734 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
736 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
737 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
739 [24046] localedata: en_US locale doesn't define date_fmt
740 [24063] manual: @var{errno} should be @code{errno}
741 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
742 [24088] libc: VSCR field is not being correctly read in ucontext_t on
744 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
746 [24097] string: Can't use 64-bit register for size_t in assembly codes for
748 [24110] hurd: SS_DISABLE never set in stack_t value returned by
750 [24112] network: Do not send DNS queries for non-host names (where all
751 answers will be rejected)
752 [24130] libc: alpha __remqu corrupts $f3 register
759 * The localization data for ISO 14651 is updated to match the 2016
760 Edition 4 release of the standard, this matches data provided by
761 Unicode 9.0.0. This update introduces significant improvements to the
762 collation of Unicode characters. This release deviates slightly from
763 the standard in that the collation element ordering for lowercase and
764 uppercase LATIN script characters is adjusted to ensure that regular
765 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
766 is not matched by [a-z]. With the update many locales have been
767 updated to take advantage of the new collation information. The new
768 collation information has increased the size of the compiled locale
769 archive or binary locales.
771 * The GNU C Library can now be compiled with support for Intel CET, AKA
772 Intel Control-flow Enforcement Technology. When the library is built
773 with --enable-cet, the resulting glibc is protected with indirect
774 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
775 compatible with all existing executables and shared libraries. This
776 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
777 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
778 capable of multi-byte NOPs, like x86-64 processors as well as Intel
779 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
780 x86_64 and x32 on non-CET processors. --enable-cet has been tested
781 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
784 * The GNU C Library now has correct support for ABSOLUTE symbols
785 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
786 relocated incorrectly or in some cases discarded. The GNU linker can
787 make use of the newer semantics, but it must communicate it to the
788 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
789 field) to indicate such support is required.
791 * Unicode 11.0.0 Support: Character encoding, character type info, and
792 transliteration tables are all updated to Unicode 11.0.0, using
793 generator scripts contributed by Mike FABIAN (Red Hat).
795 * <math.h> functions that round their results to a narrower type are added
796 from TS 18661-1:2014 and TS 18661-3:2015:
798 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
801 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
804 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
807 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
810 * Two grammatical forms of month names are now supported for the following
811 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
812 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
813 support two grammatical forms in abbreviated month names: Catalan, Greek,
816 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
817 include the support for two grammatical forms of month names.
819 * Building and running on GNU/Hurd systems now works without out-of-tree
822 * The renameat2 function has been added, a variant of the renameat function
823 which has a flags argument. If the flags are zero, the renameat2 function
824 acts like renameat. If the flag is not zero and there is no kernel
825 support for renameat2, the function will fail with an errno value of
826 EINVAL. This is different from the existing gnulib function renameatu,
827 which performs a plain rename operation in case of a RENAME_NOREPLACE
828 flags and a non-existing destination (and therefore has a race condition
829 that can clobber the destination inadvertently).
831 * The statx function has been added, a variant of the fstatat64
832 function with an additional flags argument. If there is no direct
833 kernel support for statx, glibc provides basic stat support based on
834 the fstatat64 function.
836 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
837 library if installed. libidn2 version 2.0.5 or later is recommended. If
838 libidn2 is not available, internationalized domain names are not encoded
839 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
840 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
841 with an encoding error.) Flags which used to change the IDN encoding and
842 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
843 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
844 deprecated. They no longer have any effect.
846 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
847 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
848 range of ELF gABI expressions including such constructs as
849 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
850 have been further restricted, and where in the past a dynamic string
851 token sequence may have been interpreted as a literal string it will
852 now cause a load failure. These load failures were always considered
853 unspecified behaviour from the perspective of the dynamic loader, and
854 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
855 results in a load failure now.
857 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
858 implementation includes all the standard functions provided by
861 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
862 thrd_detach, thrd_exit, and thrd_join for thread management.
864 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
865 mtx_destroy for mutual exclusion.
867 - call_once for function call synchronization.
869 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
870 cnd_wait for conditional variables.
872 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
874 Application developers must link against libpthread to use ISO C threads.
876 Deprecated and removed features, and other changes affecting compatibility:
878 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
879 installed. Software that was using either header should be updated to
880 use standard <stdio.h> interfaces instead.
882 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
883 This was never required by the C standard, and the macros just expanded
884 to call alternative names for the same functions. If you hoped getc and
885 putc would provide performance improvements over fgetc and fputc, instead
886 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
887 necessary, flockfile and funlockfile.
889 * All stdio functions now treat end-of-file as a sticky condition. If you
890 read from a file until EOF, and then the file is enlarged by another
891 process, you must call clearerr or another function with the same effect
892 (e.g. fseek, rewind) before you can read the additional data. This
893 corrects a longstanding C99 conformance bug. It is most likely to affect
894 programs that use stdio to read interactive input from a terminal.
897 * The macros 'major', 'minor', and 'makedev' are now only available from
898 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
899 headers that happen to include <sys/types.h>. These macros are rarely
900 used, not part of POSIX nor XSI, and their names frequently collide with
901 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
904 <sys/sysmacros.h> is a GNU extension. Portable programs that require
905 these macros should first include <sys/types.h>, and then include
906 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
908 * The tilegx*-*-linux-gnu configurations are no longer supported.
910 * The obsolete function ustat is no longer available to newly linked
911 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
912 function has been deprecated in favor of fstatfs and statfs.
914 * The obsolete function nfsservctl is no longer available to newly linked
915 binaries. This function was specific to systems using the Linux kernel
916 and could not usefully be used with the GNU C Library on systems with
917 version 3.1 or later of the Linux kernel.
919 * The obsolete function name llseek is no longer available to newly linked
920 binaries. This function was specific to systems using the Linux kernel
921 and was not declared in a header. Programs should use the lseek64 name
922 for this function instead.
924 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
925 getaddrinfo and getnameinfo functions have been deprecated. The behavior
926 previously selected by them is now always enabled.
928 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
929 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
930 restriction (rejecting '_' in host names, among other things) has been
931 removed, for increased compatibility with non-IDN name resolution.
933 * The fcntl function now have a Long File Support variant named fcntl64. It
934 is added to fix some Linux Open File Description (OFD) locks usage on non
935 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
936 fcntl and LFS support is handled transparently. Also for Linux, the OFD
937 locks act as a cancellation entrypoint.
939 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
940 ecb_crypt, and des_setparity are no longer available to newly linked
941 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
942 longer installed. These functions encrypted and decrypted data with the
943 DES block cipher, which is no longer considered secure. Software that
944 still uses these functions should switch to a modern cryptography library,
947 * Reflecting the removal of the encrypt and setkey functions above, the
948 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
949 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
952 * The obsolete function fcrypt is no longer available to newly linked
953 binaries. It was just another name for the standard function crypt,
954 and it has not appeared in any header file in many years.
956 * We have tentative plans to hand off maintenance of the passphrase-hashing
957 library, libcrypt, to a separate development project that will, we hope,
958 keep up better with new passphrase-hashing algorithms. We will continue
959 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
960 'crypt_r' should not need to change at all; however, distributions will
961 need to install <crypt.h> and libcrypt from a separate project.
963 In this release, if the configure option --disable-crypt is used, glibc
964 will not install <crypt.h> or libcrypt, making room for the separate
965 project's versions of these files. The plan is to make this the default
966 behavior in a future release.
968 Changes to build and runtime requirements:
970 GNU make 4.0 or later is now required to build glibc.
972 Security related changes:
974 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
975 been fixed by removing the glibc-internal IDNA implementation and using
976 the system-provided libidn2 library instead. Originally reported by Hanno
977 Böck and Christian Weisgerber.
979 CVE-2017-18269: An SSE2-based memmove implementation for the i386
980 architecture could corrupt memory. Reported by Max Horn.
982 CVE-2018-11236: Very long pathname arguments to realpath function could
983 result in an integer overflow and buffer overflow. Reported by Alexey
986 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
987 architecture could write beyond the target buffer, resulting in a buffer
988 overflow. Reported by Andreas Schwab.
990 The following bugs are resolved with this release:
992 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
993 [6889] manual: 'PWD' mentioned but not specified
994 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
995 when __WORDSIZE != 64
996 [13762] regex: re_search etc. should return -2 on memory exhaustion
997 [13888] build: /tmp usage during testing
998 [13932] math: dbl-64 pow unexpectedly slow for some inputs
999 [14092] nptl: Support C11 threads
1000 [14095] localedata: Review / update collation data from Unicode / ISO
1002 [14508] libc: -Wformat warnings
1003 [14553] libc: Namespace pollution loff_t in sys/types.h
1004 [14890] libc: Make NT_PRFPREG canonical.
1005 [15105] libc: Extra PLT references with -Os
1006 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1008 [16335] manual: Feature test macro documentation incomplete and out of
1010 [16552] libc: Unify umount implementations in terms of umount2
1011 [17082] libc: htons et al.: statement-expressions prevent use on global
1012 scope with -O1 and higher
1013 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1014 [17438] localedata: pt_BR: wrong d_fmt delimiter
1015 [17662] libc: please implement binding for the new renameat2 syscall
1016 [17721] libc: __restrict defined as /* Ignore */ even in c11
1017 [17979] libc: inconsistency between uchar.h and stdint.h
1018 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1019 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1020 horrible machine code)
1021 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1023 [18471] libc: llseek should be a compat symbol
1024 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1026 [18991] nss: nss_files skips large entry in database
1027 [19239] libc: Including stdlib.h ends up with macros major and minor being
1029 [19463] libc: linknamespace failures when compiled with -Os
1030 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1031 [19527] locale: Normalized charset name not recognized by setlocale
1032 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1033 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1035 [19728] network: out of bounds stack read in libidn function
1036 idna_to_ascii_4i (CVE-2016-6261)
1037 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1038 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1039 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1041 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1042 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1043 [20419] dynamic-link: files with large allocated notes crash in
1045 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1046 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1047 [20980] manual: CFLAGS environment variable replaces vital options
1048 [21163] regex: Assertion failure in pop_fail_stack when executing a
1049 malformed regexp (CVE-2015-8985)
1050 [21234] manual: use of CFLAGS makes glibc detect no optimization
1051 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1052 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1053 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1054 [21508] locale: intl/tst-gettext failure with latest msgfmt
1055 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1056 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1057 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1059 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1061 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1062 [22247] network: Integer overflow in the decode_digit function in
1063 puny_decode.c in libidn (CVE-2017-14062)
1064 [22342] nscd: NSCD not properly caching netgroup
1065 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1066 [22550] localedata: es_ES locale (and other es_* locales): collation
1067 should treat ñ as a primary different character, sync the collation
1068 for Spanish with CLDR
1069 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1070 by gcc configured with --enable-default-pie
1071 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1072 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1073 crossing 2GB threshold (CVE-2017-18269)
1074 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1076 [22735] time: Misleading typo in time.h source comment regarding
1078 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1079 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1080 `__assert_perror_fail ()' to `__assert_fail_base ()'
1081 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1083 [22786] libc: Stack buffer overflow in realpath() if input size is close
1084 to SSIZE_MAX (CVE-2018-11236)
1085 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1086 through an absolute DT_NEEDED path
1087 [22792] build: tcb-offsets.h dependency dropped
1088 [22797] libc: pkey_get() uses non-reserved name of argument
1089 [22807] libc: PTRACE_* constants missing for powerpc
1090 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1091 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1092 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1093 [22848] localedata: ca_ES: update date definitions from CLDR
1094 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1095 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1096 [22896] localedata: Update locale data for an_ES
1097 [22902] math: float128 test failures with GCC 8
1098 [22918] libc: multiple common of `__nss_shadow_database'
1099 [22919] libc: sparc32: backtrace yields infinite backtrace with
1101 [22926] libc: FTBFS on powerpcspe
1102 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1104 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1105 [22947] libc: FAIL: misc/tst-preadvwritev2
1106 [22963] localedata: cs_CZ: Add alternative month names
1107 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1108 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1109 [22998] dynamic-link: execstack tests are disabled when SELinux is
1111 [23005] network: Crash in __res_context_send after memory allocation
1113 [23007] math: strtod cannot handle -nan
1114 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1115 [23036] regex: regex equivalence class regression
1116 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1117 [23069] libc: sigaction broken on riscv64-linux-gnu
1118 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1119 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1120 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1121 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1122 and libc build with -Os)
1123 [23140] localedata: More languages need two forms of month names
1124 [23145] libc: _init/_fini aren't marked as hidden
1125 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1126 [23171] math: C++ iseqsig for long double converts arguments to double
1127 [23178] nscd: sudo will fail when it is run in concurrent with commands
1128 that changes /etc/passwd
1129 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1131 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1132 [23208] localedata: New locale - Lower Sorbian (dsb)
1133 [23233] regex: Memory leak in build_charclass_op function in file
1135 [23236] stdio: Harden function pointers in _IO_str_fields
1136 [23250] nptl: Offset of __private_ss differs from GCC
1137 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1138 -mtune=generic -mfpmath=sse
1139 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1141 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1142 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1144 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1145 [23277] math: nan function should not have const attribute
1146 [23279] math: scanf and strtod wrong for some hex floating-point
1147 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1149 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1150 [23303] build: undefined reference to symbol
1151 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1152 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1154 [23313] stdio: libio vtables validation and standard file object
1156 [23329] libc: The __libc_freeres infrastructure is not properly run across
1158 [23349] libc: Various glibc headers no longer compatible with
1160 [23351] malloc: Remove unused code related to heap dumps and malloc
1162 [23363] stdio: stdio-common/tst-printf.c has non-free license
1163 [23396] regex: Regex equivalence regression in single-byte locales
1164 [23422] localedata: oc_FR: More updates of locale data
1165 [23442] build: New warning with GCC 8
1166 [23448] libc: Out of bounds access in IBM-1390 converter
1167 [23456] libc: Wrong index_cpu_LZCNT
1168 [23458] build: tst-get-cpu-features-static isn't added to tests
1169 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1171 [23467] dynamic-link: x86/CET: A property note parser bug
1178 * The GNU C Library can now be compiled with support for building static
1179 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1180 executables are like static executables but can be loaded at any address
1181 and provide additional security hardening benefits at the cost of some
1182 memory and performance. When the library is built with --enable-static-pie
1183 the resulting libc.a is usable with GCC 8 and above to create static PIE
1184 executables using the GCC option '-static-pie'. This feature is currently
1185 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1186 aarch64 with binutils 2.30 or later.
1188 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1189 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1192 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1194 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1196 * In order to support faster and safer process termination the malloc API
1197 family of functions will no longer print a failure address and stack
1198 backtrace after detecting heap corruption. The goal is to minimize the
1199 amount of work done after corruption is detected and to avoid potential
1200 security issues in continued process execution. Reducing shutdown time
1201 leads to lower overall process restart latency, so there is benefit both
1202 from a security and performance perspective.
1204 * The abort function terminates the process immediately, without flushing
1205 stdio streams. Previous glibc versions used to flush streams, resulting
1206 in deadlocks and further data corruption. This change also affects
1207 process aborts as the result of assertion failures.
1209 * On platforms where long double has the IEEE binary128 format (aarch64,
1210 alpha, mips64, riscv, s390 and sparc), the math library now implements
1211 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1212 These are the same interfaces added in version 2.26 for some platforms where
1213 this format is supported but is not the format of long double.
1215 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1216 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1217 implements interfaces for that type, as defined by ISO/IEC TS
1218 18661-3:2015. These are corresponding interfaces to those supported for
1221 * The math library now implements interfaces for the _Float32, _Float64 and
1222 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1223 corresponding interfaces to those supported for _Float128.
1225 * glibc now implements the memfd_create and mlock2 functions on Linux.
1227 * Support for memory protection keys was added. The <sys/mman.h> header now
1228 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1231 * The copy_file_range function was added.
1233 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1235 * The ldconfig utility now processes `include' directives using the C/POSIX
1236 collation ordering. Previous glibc versions used locale-specific
1237 ordering, the change might break systems that relied on that.
1239 * Support for two grammatical forms of month names has been added.
1240 In a call to strftime, the "%B" and "%b" format specifiers will now
1241 produce the grammatical form required when the month is used as part
1242 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1243 required when the month is named by itself. For instance, in Greek
1244 and in many Slavic and Baltic languages, "%B" will produce the month
1245 in genitive case, and "%OB" will produce the month in nominative case.
1247 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1248 are all valid and will all accept any known form of month
1249 name---standalone or complete, abbreviated or full. In a call to
1250 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1251 the strings used by "%B" and "%b", respectively. New query
1252 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1253 used by "%OB" and "%Ob", respectively.
1255 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1256 define the strings for %OB and %Ob, respectively; these have the
1257 same syntax as "mon" and "abmon". These arrays are optional; if they
1258 are not provided then they have the same content as "mon" and "abmon",
1261 These features are provided for locales which define "alt_mon" and/or
1262 "ab_alt_mon" in their locale source data. This release includes such
1263 alternative month name data for the following languages: Belarusian,
1264 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1266 This feature is currently a GNU extension, but it is expected to
1267 be added to the next revision of POSIX, and it is also already
1268 available on some BSD-derived operating systems.
1270 This feature will cause existing statically compiled applications
1271 to fail to load locales and fall back to the builtin C/POSIX locales.
1272 See notes below for other changes affecting compatibility.
1274 * Support for the RISC-V ISA running on Linux has been added. This port
1275 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1276 for the following ISA and ABI pairs:
1282 Deprecated and removed features, and other changes affecting compatibility:
1284 * Statically compiled applications attempting to load locales compiled for the
1285 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1286 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1287 support for two grammatical forms of the month names, also extends the locale
1288 data binary format. Static applications needing locale support must be
1289 recompiled to match the runtime and data they are deployed with. In some
1290 distributions there is an upgrade window where dynamically linked applications
1291 may use a new library but the old locale data and also fall back to the
1292 builtin C/POSIX locales; restarting the application process is sufficient to
1295 * Support for statically linked applications which call dlopen is deprecated
1296 and will be removed in a future version of glibc. Applications which call
1297 dlopen need to be linked dynamically instead.
1299 * Support for old programs which use internal stdio data structures and
1300 functions is deprecated. This includes programs which use the C++ streams
1301 provided by libstdc++ in GCC 2.95. Programs which use the internal
1302 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1303 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1304 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1305 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1306 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1307 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1308 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1309 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1310 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1311 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1312 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1313 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1314 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1315 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1316 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1317 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1318 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1319 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1320 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1321 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1322 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1323 future version of glibc. Unlike other symbol removals, these old
1324 applications will not be supported using compatibility symbols.
1326 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1327 defined by <sys/ptrace.h>.
1329 * libm no longer supports SVID error handling (calling a user-provided
1330 matherr function on error) or the _LIB_VERSION variable to control error
1331 handling. (SVID error handling and the _LIB_VERSION variable still work
1332 for binaries linked against older versions of the GNU C Library.) The
1333 libieee.a library is no longer provided. math.h no longer defines struct
1334 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1335 TLOSS, PLOSS and HUGE.
1337 * The libm functions pow10, pow10f and pow10l are no longer supported for
1338 new programs. Programs should use the standard names exp10, exp10f and
1339 exp10l for these functions instead.
1341 * The mcontext_t type is no longer the same as struct sigcontext. On
1342 platforms where it was previously the same, this changes the C++ name
1343 mangling for interfaces involving this type.
1345 * The add-ons mechanism for building additional packages at the same time as
1346 glibc has been removed. The --enable-add-ons configure option is now
1349 * The --without-fp configure option is now ignored. Whether hardware
1350 floating-point instructions are used is now configured based on whether
1351 the compiler used at configure time (without any options implied by a
1352 --with-cpu= configure option) uses such instructions.
1354 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1355 the specified string can be parsed as a domain name.
1357 * In the malloc_info output, the <heap> element may contain another <aspace>
1358 element, "subheaps", which contains the number of sub-heaps.
1360 * The libresolv function p_secstodate is no longer supported for new
1363 * The tilepro-*-linux-gnu configuration is no longer supported.
1365 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1366 and will be removed in a future release. Software that is still using
1367 either header should be updated to use standard <stdio.h> interfaces
1370 libio.h was originally the header for a set of supported GNU extensions,
1371 but they have not been maintained as such in many years, they are now
1372 standing in the way of improvements to stdio, and we don't think there are
1373 any remaining external users. _G_config.h was never intended for public
1374 use, but predates the bits convention.
1376 Changes to build and runtime requirements:
1378 * bison version 2.7 or later is required to generate code in the 'intl'
1381 Security related changes:
1383 CVE-2009-5064: The ldd script would sometimes run the program under
1384 examination directly, without preventing code execution through the
1385 dynamic linker. (The glibc project disputes that this is a security
1386 vulnerability; only trusted binaries must be examined using the ldd
1389 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1390 suffered from a one-byte overflow during ~ operator processing (either
1391 on the stack or the heap, depending on the length of the user name).
1392 Reported by Tim RĂŒhsen.
1394 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1395 would sometimes fail to free memory allocated during ~ operator
1396 processing, leading to a memory leak and, potentially, to a denial
1399 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1400 without GLOB_NOESCAPE, could write past the end of a buffer while
1401 unescaping user names. Reported by Tim RĂŒhsen.
1403 CVE-2017-17426: The malloc function, when called with an object size near
1404 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1405 instead of NULL. This was a regression introduced with the new malloc
1406 thread cache in glibc 2.26. Reported by Iain Buclaw.
1408 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1409 to the allocation of too much memory. (This is not a security bug per se,
1410 it is mentioned here only because of the CVE assignment.) Reported by
1413 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1414 of the number of search path components. (This is not a security
1415 vulnerability per se because no trust boundary is crossed if the fix for
1416 CVE-2017-1000366 has been applied, but it is mentioned here only because
1417 of the CVE assignment.) Reported by Qualys.
1419 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1420 for AT_SECURE or SUID binaries could be used to load libraries from the
1423 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1424 succeeds without returning an absolute path due to unexpected behaviour
1425 of the Linux kernel getcwd syscall. Reported by halfdog.
1427 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1428 an object size near the value of SIZE_MAX, would return a pointer to a
1429 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1431 CVE-2018-6551: The malloc function, when called with an object size near
1432 the value of SIZE_MAX, would return a pointer to a buffer which is too
1433 small, instead of NULL.
1435 The following bugs are resolved with this release:
1437 [866] glob: glob should match dangling symlinks
1438 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1439 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1441 [5997] math: Very slow execution of sinf function
1442 [10580] localedata: hr_HR: updated locale
1443 [10871] locale: 'mon' array should contain both nominative and genitive
1445 [12349] localedata: eu_ES: incorrect thousands separator
1446 [13605] localedata: shn_MM: new Shan locale
1447 [13805] localedata: ru_RU: currency should use ',' as radix point
1448 [13953] localedata: km_KH: locale update
1449 [13994] localedata: mjw_IN: new locale
1450 [14121] build: make writes .mo files in po directory
1451 [14333] libc: Fix the race between atexit() and exit()
1452 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1453 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1455 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1456 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1457 width Latin characters
1458 [15332] localedata: es_CU: locale update
1459 [15436] stdio: Don't close or flush stdio streams on abort
1460 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1462 [16148] localedata: ca_ES: incorrect thousands separator
1463 [16750] dynamic-link: ldd should not try to execute the binaries
1465 [16777] localedata: pl_PL: incorrect thousands separator in locale
1466 [16905] localedata: hanzi: new collation
1467 [17563] localedata: cmn_TW: add hanzi collation
1468 [17750] localedata: wrong collation order of diacritics in most locales
1469 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1471 [17956] build: Build fails on missing definitions from header file
1472 nss/nss.h when Mozilla NSS is used for cryptography
1473 [18203] libc: realpath() does not handle unreachable paths correctly
1474 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1475 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1476 [18822] libc: Internal functions are called via PLT
1477 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1478 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1479 [19574] libc: glibc should support building static PIE binaries
1480 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1482 [19971] glob: glob: Do not skip entries with zero d_ino values
1483 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1484 [20008] localedata: km_KH: convert to translit_neutral
1485 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1486 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1487 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1488 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1489 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1491 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1492 they're set, wrong errors returned by gaih_inet when lookup functions
1494 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1495 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1497 [20952] localedata: yuw_PG: new locale
1498 [21084] localedata: charmaps/IBM858: new codepage
1499 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1500 [21242] libc: assert gives pedantic warning in old gcc versions
1501 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1502 __regcall calling convention
1503 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1504 [21326] libc: C99 functions are not declared for C++11 and later if
1505 _GNU_SOURCE is not predefined by g++
1506 [21457] libc: sys/ucontext.h namespace
1507 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1508 [21660] math: GCC fails to compile a formula with tgmath.h
1509 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1510 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1511 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1512 [21684] math: tgmath.h handling of complex integers
1513 [21685] math: tgmath.h handling of bit-fields
1514 [21686] math: tgmath.h handling of __int128
1515 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1517 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1519 [21750] localedata: column width of characters incompatible with classical
1521 [21754] malloc: malloc: Perform as little work as possible after heap
1522 consistency check failures
1523 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1524 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1525 [21791] string: Unused XXX_chk_XXX functions in libc.a
1526 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1528 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1530 [21845] localedata: Added new Locale bho_NP
1531 [21853] localedata: Fix abday Which looks same as day in zh_SG
1532 [21854] localedata: Added New Locale en_SC
1533 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1534 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1535 _dl_runtime_resolve_avx_slow
1536 [21885] network: getaddrinfo: gethosts does not release resolver context
1537 on memory allocation failure
1538 [21899] libc: XPG4.2 sigaction namespace
1539 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1541 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1543 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1544 errno value, causing getaddrinfo to fail
1545 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1546 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1547 instead of EAI_NODATA
1548 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1549 constant PTRACE_SEIZE_DEVEL
1550 [21930] math: C-only gcc builtins used in <math.h> isinf
1551 [21932] network: Unpaired __resolv_context_get in generic get*_r
1553 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1554 [21944] libc: sigval namespace
1555 [21951] localedata: Update hanzi collation by stroke
1556 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1557 sysdeps/x86_64/fpu/e_expf.S
1558 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1559 allocation in syscall loops)
1560 [21959] localedata: Fix Country name for xh_ZA
1561 [21960] localedata: Fix abmon for bem_ZM
1562 [21966] math: AVX2 mathvec functions use FMA without checking
1563 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1564 [21971] localedata: Added New Locale for mfe_MU
1565 [21972] libc: assert macro requires operator== (int) for its argument type
1566 [21973] math: [sparc] libm missing sqrtl compat symbol
1567 [21974] libc: Remove __bb_init_func and __bb_exit_func
1568 [21982] string: stratcliff.c: error: assuming signed overflow does not
1570 [21986] stdio: __guess_grouping is called incorrectly
1571 [21987] math: [sparc32] wrong bits/long-double.h installed
1572 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1574 [22022] localedata: Missing country_name for mni_IN
1575 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1577 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1579 [22026] locale: iconv_open: heap overflow on gconv_init failure
1580 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1581 [22035] math: [m68k] bits/math-inline.h macro namespace
1582 [22038] localedata: Fix abbreviated weeks and months for Somali
1583 [22044] localedata: Remove redundant data for Limburgish Language
1584 [22050] malloc: Linking with -lmcheck does not hook
1585 __malloc_initialize_hook correctly
1586 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1587 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1588 [22070] localedata: charmaps/UTF-8: wcwidth for
1589 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1590 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1591 Jungseong and Jongseong) should be 0
1592 [22078] nss: nss_files performance issue in multi mode
1593 [22082] math: bits/math-finite.h exp10 condition
1594 [22086] libc: pcprofiledump incorrect cross-endian condition
1595 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1596 [22095] network: Name server address allocation memory leak in resolv.conf
1598 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1600 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1601 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1603 [22111] malloc: malloc: per thread cache is not returned when thread exits
1604 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1605 [22134] libc: [linux] implement fexecve with execveat
1606 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1608 [22145] libc: ttyname() gives up too early in the face of namespaces
1609 [22146] math: C++ build issue with float128 on x86_64
1610 [22153] nptl: nptl: save error code before process termination
1611 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1612 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1613 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1614 [22165] libc: [hppa] Text relocations in libc.so
1615 [22180] libc: destructor registered via __cxa_atexit is called twice
1616 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1617 symlinks") cause "make" segfaults
1618 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1620 [22207] libc: FAIL: stdlib/test-atexit-race
1621 [22225] math: nearbyint arithmetic moved before feholdexcept
1622 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1623 [22235] math: iscanonical in C++ and float128
1624 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1625 the svid compat wrapper
1626 [22244] math: ynf and yn are wrong without the svid compat wrapper
1627 [22273] libc: Improper assert in Linux posix_spawn implementation
1628 [22284] libc: -pg -pie doesn't work
1629 [22292] locale: localedef exits with error 4 when it should be error 1
1630 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1631 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1633 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1634 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1636 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1637 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1638 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1639 [22322] libc: [mips64] wrong bits/long-double.h installed
1640 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1641 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1643 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1644 [22343] malloc: Integer overflow in posix_memalign
1645 [22347] libc: getrandom() returns the number of bytes that were copied to
1646 the buffer even though the comments say "Return 0 on success and -1 on
1648 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1649 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1651 [22370] dynamic-link: Incorrect note padding check
1652 [22375] libc: malloc returns pointer from tcache_get when should return
1653 NULL (CVE-2017-17426)
1654 [22377] math: iseqsig, float128 and C++
1655 [22382] localedata: Error in tpi_PG locale
1656 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1657 inside the ASCII printable range
1658 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1660 [22403] localedata: Slash needs escaping in some locales
1661 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1662 [22409] network: res_hnok does not accept some host names used on the
1664 [22412] network: res_dnok, res_hnok should perform syntax checks
1665 [22413] network: ns_name_pton ignores syntactically invalid trailing
1667 [22415] stdio: setvbuf can lead to invalid free/segfault
1668 [22432] build: Non-deterministic build
1669 [22439] malloc: malloc_info should compute summary statistics for all sub-
1671 [22442] network: if_nametoindex could report index for the wrong
1672 networking interface
1673 [22446] build: aliasing violation calling readlink in handle_request
1674 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1675 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1676 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1677 __nscd_hash/__nss_hash
1678 [22463] network: p_secstodate overflow handling
1679 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1680 [22478] libc: sigwait can fail with EINTR
1681 [22505] libc: ldconfig processes include directive in locale-specific
1683 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1684 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1685 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1686 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1687 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1688 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1689 same as for Croatian
1690 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1691 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1692 [22577] libc: missing newline after "cannot allocate TLS data structures
1694 [22588] manual: manual/conf.texi: missing underscore in front of
1696 [22593] math: nextafter and nexttoward are declared with const attribute
1697 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1698 [22603] string: ia64 memchr overflows internal pointer check
1699 [22605] libc: SH clone does not set the exit code correctly
1700 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1702 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1703 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1704 modified in case of success
1705 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1706 [22615] manual: manual: ambiguous wording about errno value in case of
1708 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1710 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1711 binaries or if /proc is not mounted (CVE-2017-16997)
1712 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1713 [22630] build: $(no-pie-ldflag) is no longer effective
1714 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1715 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1716 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1717 [22637] nptl: guard size is subtracted from thread stack size instead of
1719 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1720 [22657] localedata: hu_HU: Avoid double space in date
1721 [22660] math: fmax, fmin sNaN handling on alpha
1722 [22664] libc: New warning of GCC8
1723 [22665] math: alpha: ceil and floor raise inexact exceptions
1724 [22666] math: alpha: trunc raise inexact exceptions
1725 [22667] libc: makecontext lacks stack alignment on i386
1726 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1727 [22679] libc: getcwd(3) can succeed without returning an absolute path
1729 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1730 elision and tunables
1731 [22687] math: [powerpc-nofpu] complex long double functions spurious
1733 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1734 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1735 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1737 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1738 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1740 [22701] nis: Incomplete removal of libnsl
1741 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1742 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1743 [22715] dynamic-link: FAIL: elf/tst-audit10
1744 [22719] libc: Backtrace tests fail on hppa
1745 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1746 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1747 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1748 before the first call to crypt_r () in crypt/badsalttest.c
1755 * A per-thread cache has been added to malloc. Access to the cache requires
1756 no locks and therefore significantly accelerates the fast path to allocate
1757 and free small amounts of memory. Refilling an empty cache requires locking
1758 the underlying arena. Performance measurements show significant gains in a
1759 wide variety of user workloads. Workloads were captured using a special
1760 instrumented malloc and analyzed with a malloc simulator. Contributed by
1761 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1763 * Unicode 10.0.0 Support: Character encoding, character type info, and
1764 transliteration tables are all updated to Unicode 10.0.0, using
1765 generator scripts contributed by Mike FABIAN (Red Hat).
1766 These updates cause user visible changes, especially the changes in
1767 wcwidth for many emoji characters cause problems when emoji sequences
1768 are rendered with pango, see for example:
1769 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1771 * Collation of Hungarian has been overhauled and is now consistent with "The
1772 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1775 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1777 - The GNU C Library will now detect when /etc/resolv.conf has been
1778 modified and reload the changed configuration. The new resolver option
1779 âno-reloadâ (RES_NORELOAD) disables this behavior.
1781 - The GNU C Library now supports an arbitrary number of search domains
1782 (configured using the âsearchâ directive in /etc/resolv.conf);
1783 previously, there was a hard limit of six domains. For backward
1784 compatibility, applications that directly modify the â_resâ global
1785 object are still limited to six search domains.
1787 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1788 Library will now randomly pick a name server from the configuration as a
1789 starting point. (Previously, the second name server was always used.)
1791 * The tunables feature is now enabled by default. This allows users to tweak
1792 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1794 * New function reallocarray, which resizes an allocated block (like realloc)
1795 to the product of two sizes, with a guaranteed clean failure upon integer
1796 overflow in the multiplication. Originally from OpenBSD, contributed by
1797 Dennis Wölfing and RĂŒdiger Sonderfeld.
1799 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1800 These are extended versions of preadv and pwritev, respectively, taking an
1801 additional flags argument. The set of supported flags depends on the
1802 running kernel; full support currently requires kernel 4.7 or later.
1804 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1805 create a new session ID for the spawned process. This feature is
1806 scheduled to be added to the next major revision of POSIX; for the time
1807 being, it is available under _GNU_SOURCE.
1809 * errno.h is now safe to use from C-preprocessed assembly language on all
1810 supported operating systems. In this context, it will only define the
1811 Exxxx constants, as preprocessor macros expanding to integer literals.
1813 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1814 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1815 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1816 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1818 To compile programs that use this feature, the compiler must support
1819 128-bit floating point with the type name _Float128 (as defined by TS
1820 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1821 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1822 must be defined to make the new interfaces visible.
1824 The new functions and macros correspond to those present for other
1825 floating-point types (except for a few obsolescent interfaces not
1826 supported for the new type), with F128 or f128 suffixes; for example,
1827 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1828 printf or scanf formats for the new type; the strfromf128 and strtof128
1829 interfaces should be used instead.
1831 Deprecated and removed features, and other changes affecting compatibility:
1833 * The synchronization that pthread_spin_unlock performs has been changed to
1834 now be equivalent to a C11 atomic store with release memory order to the
1835 spin lock's memory location. Previously, several (but not all)
1836 architectures used stronger synchronization (e.g., containing what is
1837 often called a full barrier). This change can improve performance, but
1838 may affect odd fringe uses of spin locks that depend on the previous
1839 behavior (e.g., using spin locks as atomic variables to try to implement
1840 Dekker's mutual exclusion algorithm).
1842 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1845 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1846 will only be built and installed when the GNU C Library is configured with
1847 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1848 as TIRPC or rpcsvc-proto, to be used.
1850 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1851 libnss_compat, are deprecated, and will not be built or installed by
1854 The NIS(+) support library, libnsl, is also deprecated. By default, a
1855 compatibility shared library will be built and installed, but not headers
1856 or development libraries. Only a few NIS-related programs require this
1857 library. (In particular, the GNU C Library has never required programs
1858 that use 'gethostbyname' to be linked with libnsl.)
1860 Replacement implementations based on TIRPC, which additionally support
1861 IPv6, are available from <https://github.com/thkukuk/>. The configure
1862 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1863 name service modules, to be built and installed.
1865 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1866 support is enabled, the configured recursive resolver must support EDNS.
1867 (Responding to EDNS-enabled queries with responses which are not
1868 EDNS-enabled is fine, but FORMERR responses are not.)
1870 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1871 servers have not supported this opcode for a long time.
1873 * The _res_opcodes variable has been removed from libresolv. It had been
1874 exported by accident.
1876 * <string.h> no longer includes inline versions of any string functions,
1877 as this kind of optimization is better done by the compiler. The macros
1878 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1880 * The nonstandard header <xlocale.h> has been removed. Most programs should
1881 use <locale.h> instead. If you have a specific need for the definition of
1882 locale_t with no other declarations, please contact
1883 libc-alpha@sourceware.org and explain.
1885 * The obsolete header <sys/ultrasound.h> has been removed.
1887 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1889 * The obsolete function cfree has been removed. Applications should use
1892 * The stack_t type no longer has the name struct sigaltstack. This changes
1893 the C++ name mangling for interfaces involving this type.
1895 * The ucontext_t type no longer has the name struct ucontext. This changes
1896 the C++ name mangling for interfaces involving this type.
1898 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1899 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1900 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1901 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1902 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1903 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1904 fpregset_t type no longer has the name struct fpu. This changes the C++
1905 name mangling for interfaces involving those types.
1907 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1908 synced with the kernel:
1910 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1911 are not supported on this architecture and have been removed.
1913 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1914 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1915 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1917 Programs that assume the GET/SETREGS ptrace requests are universally
1918 available will now fail to build, instead of malfunctioning at runtime.
1920 Changes to build and runtime requirements:
1922 * Linux kernel 3.2 or later is required at runtime, on all architectures
1923 supported by that kernel. (This is a change from version 2.25 only for
1926 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1928 * On most architectures, GCC 4.9 or later is required to build the GNU C
1929 Library. On powerpc64le, GCC 6.2 or later is required.
1931 Older GCC versions and non-GNU compilers are still supported when
1932 compiling programs that use the GNU C Library. (We do not know exactly
1933 how old, and some GNU extensions to C may be _de facto_ required. If you
1934 are interested in helping us make this statement less vague, please
1935 contact libc-alpha@sourceware.org.)
1937 Security related changes:
1939 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1940 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1942 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1943 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1945 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1946 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1949 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1950 fixed (CVE-2017-12133).
1952 The following bugs are resolved with this release:
1954 [984] network: Respond to changed resolv.conf in gethostbyname
1955 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1956 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1958 [12189] libc: __stack_chk_fail should not attempt a backtrace
1960 [14096] time: Race condition on timezone/tst-timezone.out
1961 [14172] localedata: az_IR: new locale
1962 [14995] build: glibc fails to build if gold is the default linker, even if
1964 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1965 [16637] network: inet_pton function is accepting IPv6 with bad format
1966 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1967 x86 and other generic code
1968 [16875] localedata: ko_KR: fix lang_name
1969 [17225] localedata: ar_SY: localized month names for May and June are
1971 [17297] localedata: da_DK: wrong date_fmt string
1972 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1973 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1974 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1975 [19066] localedata: ar_SA abbreviated day and month names are in English
1976 [19569] network: resolv: Support an arbitrary number of search domains
1977 [19570] network: Implement random DNS server selection in the stub
1979 [19838] locale: localedef fails on PA-RISC
1980 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1981 order of 0D36 and 0D37
1982 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1984 [20098] libc: FAIL: debug/backtrace-tst on hppa
1985 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1987 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1989 [20313] localedata: Update locale data to Unicode 9.0
1990 [20424] manual: Document how to provide a malloc replacement
1991 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1993 [20686] locale: Add el_GR@euro to SUPPORTED.
1994 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1995 failures consistently
1996 [21015] dynamic-link: Document and fix --enable-bind-now
1997 [21016] nptl: pthread_cond support is broken on hppa
1998 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1999 frame-pointer on i386
2000 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2002 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2003 [21088] libc: Build fails with --enable-static-nss
2004 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2005 generic c code is used
2006 [21109] libc: Tunables broken on big-endian
2007 [21112] math: powf has large ulp errors with base close to 1 and exponent
2009 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2011 [21120] malloc: glibc malloc is incompatible with GCC 7
2012 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2014 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2015 (-0.0) when linking with -lieee
2016 [21171] math: log10, log2 and lgamma return incorrect results
2017 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2018 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2019 [21207] localedata: ce_RU: update weekdays from CLDR
2020 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2021 [21217] localedata: Update months from CLDR-31
2022 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2023 [21243] libc: support_delete_temp_file should issue warning for failed
2025 [21244] libc: support resolv_test_start() socket fd close should be
2027 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2028 new posix_spawn implementation
2029 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2030 leads to lower CPU frequency
2031 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2032 [21261] libc: [sparc64] bits/setjmp.h namespace
2033 [21267] network: [mips] bits/socket.h IOC* namespace
2034 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2035 [21270] libc: mmap64 silently truncates large offset values
2036 [21275] libc: posix_spawn always crashes on ia64 now
2037 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2038 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2039 [21289] libc: Incorrect declaration for 32-bit platforms with
2040 _FILE_OFFSET_BITS=64 causes build error
2041 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2042 not support gethostbyname4_r
2043 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2045 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2047 [21340] libc: Support POSIX_SPAWN_SETSID
2048 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2049 [21359] network: ns_name_pack needs additional byte in destination buffer
2050 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2051 against fragmentation attacks (CVE-2017-12132)
2052 [21369] network: resolv: Remove EDNS fallback
2053 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2055 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2056 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2057 [21393] stdio: Missing dup3 error check in freopen, freopen64
2058 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2059 [21399] localedata: Bad description for U00EC in
2060 localedata/charmaps/CP1254
2061 [21411] malloc: realloc documentation error
2062 [21426] network: sys/socket.h uio.h namespace
2063 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2064 [21445] libc: signal.h bsd_signal namespace
2065 [21455] network: Network headers stdint.h namespace
2066 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2068 [21475] network: resolv: Overlong search path is truncated mid-label
2069 [21511] libc: sigstack namespace
2070 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2071 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2072 bits/syscall.h: No such file or directory
2073 [21517] libc: struct sigaltstack namespace
2074 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2075 [21533] localedata: Update locale data to Unicode 10.0
2077 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2078 junk at end of line, first unrecognized character is `@'
2079 [21538] libc: SIG_HOLD missing for XPG4
2080 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2081 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2082 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2083 [21543] libc: sigevent namespace
2084 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2085 size for general purpose registers in mcontext_t structure
2086 [21550] libc: sigwait namespace
2087 [21552] libc: XPG4 bsd_signal namespace
2088 [21554] libc: sigpause namespace
2089 [21560] libc: sys/wait.h signal.h namespace
2090 [21561] libc: waitid namespace
2091 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2092 '/usr/include/stdlib.h': Permission denied
2093 [21575] libc: sys/wait.h missing struct rusage definition
2094 [21584] libc: sigaltstack etc namespace
2095 [21597] libc: siginterrupt namespace
2096 [21607] math: hppa: FAIL: math/test-tgmath
2097 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2099 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2100 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2101 stack and heap (CVE-2017-1000366)
2102 [21625] libc: wait3 namespace
2103 [21654] nss: Incorrect pointer alignment in NSS group merge result
2105 [21657] network: Parse interface zone id for node-local multicast
2106 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2108 [21666] libc: .symver is used on common symbol
2109 [21668] network: resolv: res_init cross-thread broadcast introduces race
2111 [21687] math: tgmath.h totalorder, totalordermag return type
2112 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2114 [21696] libc: Incorrect assumption of of __cpu_mask in
2115 posix/sched_cpucount.c
2116 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2117 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2119 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2120 leading to relocation crash
2121 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2122 `resolv_conf_matches (resp, conf)' failed.
2123 [21710] localedata: Added Samoan language locale for Samoa
2124 [21711] localedata: Pashto yesstr/nostr locale are missing
2125 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2126 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2127 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2128 [21723] localedata: yesstr/nostr missing for Chinese language locale
2129 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2131 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2133 [21728] localedata: New Locale for Tongan language
2134 [21729] localedata: incorrect LC_NAME fields for hi_IN
2135 [21733] localedata: yesstr and nostr are missing for zh_HK
2136 [21734] localedata: Missing yesstr and nostr are for kw_GB
2137 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2138 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2139 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2140 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2142 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2144 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2146 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2147 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2148 [21759] localedata: missing yesstr and nostr for Tigrinya
2149 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2150 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2151 [21767] localedata: Missing Bislama locales
2152 [21768] localedata: Missing yesstr and nostr for aa_ET
2153 [21770] localedata: Missing Field in li_NL
2154 [21778] nptl: Robust mutex may deadlock
2155 [21779] libc: MicroBlaze segfaults when loading libpthread
2156 [21783] localedata: Fix int_select international_call_prefixes
2157 [21784] localedata: Inconsistency in country_isbn
2158 [21788] localedata: Missing Country Postal Abbreviations
2159 [21794] localedata: Added-country_isbn-for-Italy
2160 [21795] localedata: Add/Fix country_isbn for France
2161 [21796] localedata: Added country_isbn for Republic of Korea
2162 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2163 [21799] localedata: Added int_select international_call_prefixes
2164 [21801] localedata: Added int_select international_call_prefixes
2165 [21804] nptl: Double semicolon in thread-shared-types.h
2166 [21807] localedata: LC_ADDRESS fix for pap_CW
2167 [21808] localedata: Fix LC_ADDRESS for pap_AW
2168 [21821] localedata: Added country_name in mai_IN
2169 [21822] localedata: Fix LC_TIME for mai_IN
2170 [21823] localedata: missing yesstr, nostr for sa_IN
2171 [21825] localedata: Fix name_mrs for mag_IN
2172 [21828] localedata: 2.26 changelog should mention user visible changes
2174 [21835] localedata: Added Maithili language locale for Nepal
2175 [21838] localedata: Removed redundant data for the_NP
2176 [21839] localedata: Fix LC_MONETARY for ta_LK
2177 [21844] localedata: Fix Latin characters and Months Sequence.
2178 [21848] localedata: Fix mai_NP Title Name
2183 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2184 24731-2:2010, is supported to enable declarations of functions from that
2185 TR. Note that not all functions from that TR are supported by the GNU C
2188 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2189 18661-1:2014, is supported to enable declarations of functions and macros
2190 from that TS. Note that not all features from that TS are supported by
2193 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2194 18661-4:2015, is supported to enable declarations of functions and macros
2195 from that TS. Note that most features from that TS are not supported by
2198 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2199 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2200 Since the GNU C Library defaults to a much newer revision of POSIX, this
2201 will only affect programs that specifically request an old conformance
2202 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2203 see a change in the visible declarations, but a program compiled with
2204 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2207 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2208 defined by all multithreaded code, but glibc has not required this for
2211 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2212 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2213 will only be available from <sys/sysmacros.h>.
2215 These macros are not part of POSIX nor XSI, and their names frequently
2216 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2217 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2218 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2221 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2222 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2223 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2225 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2226 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2227 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2228 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2229 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2230 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2231 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2232 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2233 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2234 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2235 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2238 * New <math.h> features are added from TS 18661-1:2014:
2240 - Signaling NaN macros: SNANF, SNAN, SNANL.
2242 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2243 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2244 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2246 - llogb functions: the llogb, llogbf and llogbl functions, and the
2247 FP_LLOGB0 and FP_LLOGBNAN macros.
2249 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2252 - Comparison macros: iseqsig.
2254 - Classification macros: iscanonical, issubnormal, iszero.
2256 - Total order functions: totalorder, totalorderf, totalorderl,
2257 totalordermag, totalordermagf, totalordermagl.
2259 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2261 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2262 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2264 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2265 are added to libc. They convert a floating-point number into string.
2267 * Most of glibc can now be built with the stack smashing protector enabled.
2268 It is recommended to build glibc with --enable-stack-protector=strong.
2269 Implemented by Nick Alcock (Oracle).
2271 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2272 intended to be used instead of memset() to erase sensitive data after use;
2273 the compiler will not optimize out calls to explicit_bzero even if they
2274 are "unnecessary" (in the sense that no _correct_ program can observe the
2275 effects of the memory clear).
2277 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2278 to float instead of double. This does not affect the ABI of any libraries
2279 that are part of the GNU C Library, but may affect the ABI of other
2280 libraries that use this type in their interfaces.
2282 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2283 float_t and double_t types are now defined to long double instead of float
2284 and double. These options are not the default, and this does not affect
2285 the ABI of any libraries that are part of the GNU C Library, but it may
2286 affect the ABI of other libraries that use this type in their interfaces,
2287 if they are compiled or used with those options.
2289 * The getentropy and getrandom functions, and the <sys/random.h> header file
2292 * The buffer size for byte-oriented stdio streams is now limited to 8192
2293 bytes by default. Previously, on Linux, the default buffer size on most
2294 file systems was 4096 bytes (and thus remains unchanged), except on
2295 network file systems, where the buffer size was unpredictable and could be
2296 as large as several megabytes.
2298 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2299 for the Linux quota interface which predates kernel version 2.4.22 has
2302 * The malloc_get_state and malloc_set_state functions have been removed.
2303 Already-existing binaries that dynamically link to these functions will
2304 get a hidden implementation in which malloc_get_state is a stub. As far
2305 as we know, these functions are used only by GNU Emacs and this change
2306 will not adversely affect already-built Emacs executables. Any undumped
2307 Emacs executables, which normally exist only during an Emacs build, should
2308 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2310 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2311 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2312 âno-ip6-dotintâ had already been the default, and support for the
2313 âip6-dotintâ option was removed from the Internet in 2006.
2315 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2316 flag from <resolv.h> have been removed. The option relied on a
2317 backwards-incompatible DNS extension which was never deployed on the
2320 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2321 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2322 They were already unimplemented.
2324 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2325 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2326 removed again from the IETF name lookup interface specification in RFC
2327 2553. Applications should use getaddrinfo instead.
2329 * DNSSEC-related declarations and definitions have been removed from the
2330 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2331 decode the data part of DNSSEC record types. Previous versions of glibc
2332 only implemented minimal support for the previous version of DNSSEC, which
2333 is incompatible with the currently deployed version.
2335 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2336 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2337 <arpa/nameser.h> header file because the distinction between RR types and
2338 meta-RR types is not officially standardized, subject to revision, and
2339 thus not suitable for encoding in a macro.
2341 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2342 and rhook members of the res_state type in <resolv.h> have been removed.
2343 The glibc stub resolver did not support these hooks, but the header file
2344 did not reflect that.
2346 * For multi-arch support it is recommended to use a GCC which has
2347 been built with support for GNU indirect functions. This ensures
2348 that correct debugging information is generated for functions
2349 selected by IFUNC resolvers. This support can either be enabled by
2350 configuring GCC with '--enable-gnu-indirect-function', or by
2351 enabling it by default by setting 'default_gnu_indirect_function'
2352 variable for a particular architecture in the GCC source file
2355 * GDB pretty printers have been added for mutex and condition variable
2356 structures in POSIX Threads. When installed and loaded in gdb these pretty
2357 printers show various pthread variables in human-readable form when read
2358 using the 'print' or 'display' commands in gdb.
2360 * Tunables feature added to allow tweaking of the runtime for an application
2361 program. This feature can be enabled with the '--enable-tunables' configure
2362 flag. The GNU C Library manual has details on usage and README.tunables has
2363 instructions on adding new tunables to the library.
2365 * A new version of condition variables functions have been implemented in
2366 the NPTL implementation of POSIX Threads to provide stronger ordering
2369 * A new version of pthread_rwlock functions have been implemented to use a more
2370 scalable algorithm primarily through not using a critical section anymore to
2373 Security related changes:
2375 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2376 have been created with makecontext could fail to terminate due to a
2377 missing .cantunwind annotation. This has been observed to lead to a hang
2378 (denial of service) in some Go applications compiled with gccgo. Reported
2379 by Andreas Schwab. (CVE-2016-6323)
2381 * The DNS stub resolver functions would crash due to a NULL pointer
2382 dereference when processing a query with a valid DNS question type which
2383 was used internally in the implementation. The stub resolver now uses a
2384 question type which is outside the range of valid question type values.
2387 The following bugs are resolved with this release:
2389 [4099] stdio: Overly agressive caching by stream i/o functions.
2390 [7065] build: Support building glibc with -fstack-protector or -fstack-
2392 [9842] localedata: en_CA: incorrect date format
2393 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2394 before it started waiting
2395 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2396 [15765] nptl: sem_open is wrongly a cancellation point
2397 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2398 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2400 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2401 library linked with pthread
2402 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2403 "FIXME: Ingo" issue)
2404 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2405 [17252] libc: getrandom and getentropy syscall
2406 [17730] malloc: thread-local storage is sometimes improperly free()'d
2407 after being __libc_memalign()'d
2408 [18241] stdio: failed fseek on memstream does not set errno and can fail
2410 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2412 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2413 PTHREAD_PRIO_INHERIT mutex on ARM
2414 [18784] network: res_query and related function crash for special record
2415 type queries (CVE-2015-5180)
2416 [19380] math: strtod does not raise "inexact"
2417 [19387] string: Integer overflow in memchr
2418 [19390] string: Integer overflow in strncat
2419 [19398] build: linknamespace tests fail with massively parallel build
2420 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2422 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2423 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2424 [19514] libc: [PATCH] Fix spelling errors in spelling
2425 "implement"/"implementation" in several places
2426 [19582] network: Deprecate RES_USE_INET6
2427 [19673] manual: clog10 docs appear to be erroneous
2428 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2429 causes a segmentation fault
2430 [19826] libc: invalid pointer returned from __tls_get_addr with static
2432 [20016] network: resolv: Remove hooks support from the API
2433 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2435 [20033] math: [x86_64] vectorized math function don't call the __finite
2437 [20116] nptl: use after free in pthread_create
2438 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2439 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2441 [20311] nptl: please install proc_service.h
2442 [20366] libc: Compilation errors in installed headers in strict-compliance
2444 [20370] malloc: malloc: Arena free list management is still racy
2445 (incorrect fix in bug 19243)
2446 [20386] libc: assert (X = 0) does not result in GCC warning
2447 [20432] malloc: malloc: Minimize interface required for interposition
2448 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2449 in _Unwind_Backtrace (CVE-2016-6323)
2450 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2451 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2453 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2454 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2455 [20477] network: resolv: incorrect double-checked locking related to
2457 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2459 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2461 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2462 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2463 cause transition penalty
2464 [20517] math: sparcv9 missing fdiml compat symbol
2465 [20524] manual: strverscmp is inconsistent
2466 [20525] libc: <sys/quota.h> should be based on kernel headers
2467 [20539] math: GCC 7 -static -lm fails to link at -O3
2468 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2470 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2472 [20591] network: Remove obsolete DNSSEC support
2473 [20592] network: DNS resource record type classification macros in
2474 <arpa/nameser.h> are incorrect
2475 [20593] network: Update DNS RR type definitions
2476 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2477 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2479 [20629] network: libresolv: Remove support for bitstring labels
2481 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2482 assertion: "maxidx >= 2"
2483 [20660] math: [arm] Use VSQRT
2484 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2485 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2486 [20689] libc: Test for FMA should also check for AVX.
2487 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2488 [20715] math: iszero macro breaks existing code
2489 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2490 [20728] libc: powerpc: Missing TOC stub in clone
2491 [20729] build: glibc-2.24 fails to build for i486 with -Os
2492 [20750] build: Build fails with default PIE enabled gcc-6.x
2493 [20768] math: [alpha] sqrt fegetenv namespace
2494 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2496 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2497 __FLT_EVAL_METHOD__ is 2
2498 [20790] network: rpcgen buffer overrun in get_prog_declaration
2499 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2500 [20829] libc: crypt snprintf namespace
2501 [20847] libc: tst-vfork3 failure
2502 [20855] math: Default bits/mathdef.h has inappropriate float_t
2503 [20859] math: [sh4] FP_ILOGB0 invalid
2504 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2505 U+20AC), not same as GBK
2506 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2507 [20916] math: pow handling of sNaN arguments
2508 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2509 [20919] math: Bad pow (qNaN, 0) result with -lieee
2510 [20940] math: hypot sNaN handling
2511 [20947] math: fmax, fmin sNaN handling
2512 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2513 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2515 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2516 [20973] nptl: robust mutexes: Lost wake-ups
2517 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2518 [20978] nis: strlen on null pointer in nss_nisplus
2519 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2521 [21014] string: i686 memchr overflows internal pointer check
2522 [21019] libc: [mips] n32 lseek incorrect on overflow
2523 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2524 [21026] libc: [MIPS] readahead syscall is broken on n64
2525 [21028] math: Fallback fesetexceptflag should always succeed
2526 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2527 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2529 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2530 [21061] librt: [microblaze] librt lost clock_* exports
2531 [21073] libc: tunables: insecure environment variables passed to
2532 subprocesses with AT_SECURE
2533 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2537 * The minimum Linux kernel version that this version of the GNU C Library
2538 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2539 kernel version 2.6.32 or later suffices (on architectures that already
2540 required kernel versions more recent than 3.2, those requirements remain
2541 unchanged). Linux 3.2 or later kernel headers are required on all
2544 * The pap_AN locale has been deleted. This has been deprecated for a long
2545 time. It has been replaced by pap_AW & pap_CW, both of which have long
2546 been included in previous releases.
2548 * The readdir_r and readdir64_r functions have been deprecated. It is
2549 recommended to use readdir and readdir64 instead.
2551 * The type âunion waitâ has been removed. It was deprecated in the early
2552 1990s and never part of POSIX. Application code should use the int type
2553 instead of âunion waitâ.
2555 * A new NSS action is added to facilitate large distributed system
2556 administration. The action, MERGE, allows remote user stores like LDAP
2557 to be merged into local user stores like /etc/groups in order to provide
2558 easy to use, updated, and managed sets of merged credentials. The new
2559 action can be used by configuring it in /etc/nsswitch.conf:
2560 group: files [SUCCESS=merge] nis
2561 Implemented by Stephen Gallagher (Red Hat).
2563 * The deprecated __malloc_initialize_hook variable has been removed from the
2566 * The long unused localedef --old-style option has been removed. It hasn't
2567 done anything in over 16 years. Scripts using this option can safely
2570 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2571 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2572 return the next representable value in the direction of positive infinity
2573 and the nextdown functions return the next representable value in the
2574 direction of negative infinity. These are currently enabled as GNU
2577 Security related changes:
2579 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2580 could result in a stack overflow when getnetbyname was called with an
2581 overly long name. (CVE-2016-3075)
2583 * Previously, getaddrinfo copied large amounts of address data to the stack,
2584 even after the fix for CVE-2013-4458 has been applied, potentially
2585 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2586 instead. Reported by Michael Petlan. (CVE-2016-3706)
2588 * The glob function suffered from a stack-based buffer overflow when it was
2589 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2590 Reported by Alexander Cherepanov. (CVE-2016-1234)
2592 * The Sun RPC UDP client could exhaust all available stack space when
2593 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2594 alloca plugin for GCC. (CVE-2016-4429)
2596 * The IPv6 name server management code in libresolv could result in a memory
2597 leak for each thread which is created, performs a failing naming lookup,
2598 and exits. Over time, this could result in a denial of service due to
2599 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2601 The following bugs are resolved with this release:
2603 [1170] localedata: ne_NP: update Nepali locale definition file
2604 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2606 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2607 [6796] math: fdim() does not set errno on overflow
2608 [10354] libc: posix_spawn should use vfork() in more cases than presently
2609 [11213] localedata: localedata: add copyright disclaimer to locale files
2610 [12143] localedata: chr_US: new Cherokee locale
2611 [12450] localedata: sgs_LT: new locale
2612 [12676] localedata: ln_CD: new locale
2613 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2615 [13304] math: fma, fmaf, fmal produce wrong results
2616 [14259] build: --localedir arg to configure is ignored
2617 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2618 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2619 [14934] localedata: es_CL: wrong first weekday chilean locale
2620 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2622 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2624 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2625 [15368] nptl: raise() is not async-signal-safe
2626 [15479] math: ceil, floor, round and trunc raise inexact exception
2627 [15578] localedata: kk_KZ: various updates
2628 [16003] localedata: pap_AN: punt old locale
2629 [16137] localedata: iw_IL: punt old locale
2630 [16190] localedata: eo: new esperanto locale
2631 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2632 [16742] malloc: race condition: pthread_atfork() called before first
2633 malloc() results in unexpected locking behaviour/deadlocks
2634 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2636 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2637 [17565] localedata: pt_PT: wrong (work-)week start
2638 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2639 [17950] build: Build fails with -msse
2640 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2641 [18433] libc: posix_spawn does not return correctly upon failure to
2643 [18453] localedata: charmaps/IBM875: incorrect codes
2644 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2646 [18896] localedata: he_IL: improvements for currency
2647 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2648 Romanian locale data
2649 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2651 [19056] libc: Deprecate readdir_r
2652 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2654 [19198] localedata: nl_NL: small improvements for Dutch locales
2655 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2656 nameservers (CVE-2016-5417)
2657 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2659 [19400] locale: Language missing in "iso-639.def", trivial fix in
2661 [19431] malloc: Deadlock between fflush, getdelim, and fork
2662 [19505] libc: Incorrect file descriptor validity checks in
2663 posix_spawn_file_actions_add{open,close,dup2}
2664 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2665 when using RTLD_NEXT
2666 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2667 `intl/{gettextP,loadinfo}.h'
2668 [19534] libc: execle, execlp may use malloc
2669 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2670 [19573] network: res_nclose and __res_maybe_init disagree about name
2671 server initialization, breaking Hesiod
2672 [19575] localedata: Status of GB18030 tables
2673 [19581] localedata: sr_* date_fmt string contains additional newline
2674 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2676 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2677 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2678 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2679 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2681 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2683 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2685 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2686 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2687 [19633] locale: strfmon_l applies global locale to number formatting
2688 [19642] network: Memory leak in getnameinfo
2689 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2690 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2692 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2693 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2695 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2696 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2698 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2700 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2702 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2703 pointers and lengths in error-case.
2704 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2705 report errors on UTF-16 surrogates values.
2706 [19755] nscd: nscd assertion failure in gc
2707 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2708 [19759] libc: mempcpy shouldn't be inlined
2709 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2710 [19765] libc: s390 needs an optimized mempcpy
2711 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2712 NAME_MAX limit assumption (CVE-2016-1234)
2713 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2714 [19787] network: Missing and incorrect truncation checks in getnameinfo
2715 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2717 [19791] network: Assertion failure in res_query.c with un-connectable name
2719 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2720 [19822] math: libm.so install clobbers old version
2721 [19825] network: resolv: send_vc can return uninitialized data in second
2722 response to getaddrinfo
2723 [19830] network: nss_dns: should check RDATA length against buffer length
2724 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2725 confronted with A/AAAA records of invalid size
2726 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2727 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2728 [19853] stdio: Printing IBM long double in decimal with high precision is
2730 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2731 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2732 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2734 [19865] network: Assertion failure or memory leak in
2735 _nss_dns_getcanonname_r
2736 [19868] network: nss_dns: netent code does not skip over non-PTR records
2737 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2739 [19881] string: Improve x86-64 memset
2740 [19907] string: Incorrect memcpy tests
2741 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2743 [19925] libc: termios.h XCASE namespace
2744 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2745 [19929] libc: limits.h NL_NMAX namespace
2746 [19931] stdio: Memory leak in vfprintf
2747 [19957] libc: clone(CLONE_VM) access invalid parent memory
2748 [19963] localedata: en_IL: New locale
2749 [19989] stdio: stdio.h cuserid namespace
2750 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2752 [19996] locale: langinfo.h nl_langinfo_l namespace
2753 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2754 [20010] network: getaddrinfo: Stack overflow in hostent translation
2756 [20012] stdio: libio: fmemopen append mode failure
2757 [20014] stdio: stdio.h namespace for pre-threads POSIX
2758 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2759 [20023] libc: fcntl.h timespec namespace
2760 [20024] math: [x86_64] vectorized sincos trashes the stack
2761 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2762 [20041] time: sys/time.h timespec namespace
2763 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2764 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2765 [20051] libc: ttyslot in wrong header under wrong conditions
2766 [20054] libc: gethostname not declared for XPG4
2767 [20055] libc: termios.h missing tcgetsid for XPG4
2768 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2770 [20073] libc: sys/stat.h fchmod namespace
2771 [20074] libc: stdlib.h rand_r namespace
2772 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2773 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2775 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2776 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2778 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2779 [20119] libc: Wrong mask for processors level type from CPUID
2780 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2781 AS not supporting AVX512
2782 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2784 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2785 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2787 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2788 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2789 [20178] libc: posix_spawn{p} should not call exit
2790 [20191] stdio: libio: vtables hardening
2791 [20195] string: FMA4 detection requires CPUID execution with register
2793 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2794 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2796 [20212] math: acos (sNaN) returns sNaN
2797 [20213] math: asin (sNaN) returns sNaN
2798 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2799 [20218] math: [i386] asinhl (sNaN) returns sNaN
2800 [20219] math: [i386] atanhl (sNaN) returns sNaN
2801 [20222] stdio: fopencookie: Mangle function pointers
2802 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2803 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2804 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2806 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2807 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2808 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2809 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2810 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2811 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2812 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2813 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2814 [20240] math: modf (sNaN) returns sNaN
2815 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2816 [20250] math: frexp (sNaN) returns sNaN
2817 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2818 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2820 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2821 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2822 subscript is below array bounds [-Werror=array-bounds]
2823 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2824 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2826 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2827 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2829 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2830 "invalid" exceptions
2831 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2832 [20316] localedata: id_ID: Februari instead of Pebruari
2833 [20327] string: POWER8 strcasecmp returns incorrect result
2834 [20347] math: Failure: Test: j0_downward (0xap+0)
2835 [20348] libc: FAIL: misc/tst-preadvwritev64
2836 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2837 [20350] libc: There is no test for p{read,write}64
2838 [20357] math: Incorrect cos result for 1.5174239687223976
2839 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2843 * Unicode 8.0.0 Support: Character encoding, character type info, and
2844 transliteration tables are all updated to Unicode 8.0.0, using new
2845 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2846 These updates cause user visible changes, such as the fixes for bugs
2847 89, 16061, and 18568.
2849 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2850 kernel-internal CPU set size. This means that requests that change the
2851 CPU affinity which failed before (for example, an all-ones CPU mask) will
2852 now succeed. Applications that need to determine the effective CPU
2853 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2854 setting it because the kernel can adjust it (and the previous size check
2855 would not detect this in the majority of cases).
2857 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2858 the following new symbols are used: fts64_children, fts64_close,
2859 fts64_open, fts64_read and fts64_set.
2861 * getaddrinfo now detects certain invalid responses on an internal netlink
2862 socket. If such responses are received, an affected process will
2863 terminate with an error message of "Unexpected error <number> on netlink
2864 descriptor <number>" or "Unexpected netlink response of size <number> on
2865 descriptor <number>". The most likely cause for these errors is a
2866 multi-threaded application which erroneously closes and reuses the netlink
2867 file descriptor while it is used by getaddrinfo.
2869 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2870 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2871 unnecessary serialization of memory allocation requests across threads.
2872 The defect is now corrected. Users should see a substantial increase in
2873 the concurent throughput of allocation requests for applications which
2874 trigger this bug. Affected applications typically create and
2875 destroy threads frequently. (Bug 19048 was reported and analyzed by
2878 * There is now a --disable-timezone-tools configure option for disabling the
2879 building and installing of the timezone related utilities (zic, zdump, and
2880 tzselect). This is useful for people who build the timezone data and code
2881 independent of the GNU C Library.
2883 * The obsolete header <regexp.h> has been removed. Programs that require
2884 this header must be updated to use <regex.h> instead.
2886 * The obsolete functions bdflush, create_module, get_kernel_syms,
2887 query_module and uselib are no longer available to newly linked binaries;
2888 the header <sys/kdaemon.h> has been removed. These functions and header
2889 were specific to systems using the Linux kernel and could not usefully be
2890 used with the GNU C Library on systems with version 2.6 or later of the
2893 * Optimized string, wcsmbs and memory functions for IBM z13.
2894 Implemented by Stefan Liebler.
2896 * Newly linked programs that define a variable called signgam will no longer
2897 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2898 require signgam to be set by those functions must ensure that they use the
2899 variable provided by the GNU C Library and declared in <math.h>, without
2900 defining their own copy.
2902 * The minimum GCC version that can be used to build this version of the GNU
2903 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2904 still be used to compile programs using the GNU C Library.
2906 Security related changes:
2908 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2909 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2911 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2912 the pointer guard feature. It is always enabled. Previously,
2913 LD_POINTER_GUARD could be used to disable security hardening in binaries
2914 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2917 * An integer overflow in hcreate and hcreate_r could lead to an
2918 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2920 * The catopen function no longer has unbounded stack usage. Reported by
2921 Max. (CVE-2015-8779)
2923 * The nan, nanf and nanl functions no longer have unbounded stack usage
2924 depending on the length of the string passed as an argument to the
2925 functions. Reported by Joseph Myers. (CVE-2014-9761)
2927 * A stack-based buffer overflow was found in libresolv when invoked from
2928 libnss_dns, allowing specially crafted DNS responses to seize control
2929 of execution flow in the DNS client. The buffer overflow occurs in
2930 the functions send_dg (send datagram) and send_vc (send TCP) for the
2931 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2932 family. The use of AF_UNSPEC triggers the low-level resolver code to
2933 send out two parallel queries for A and AAAA. A mismanagement of the
2934 buffers used for those queries could result in the response of a query
2935 writing beyond the alloca allocated buffer created by
2936 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2937 the overflow. Thanks to the Google Security Team and Red Hat for
2938 reporting the security impact of this issue, and Robert Holiday of
2939 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2941 The following bugs are resolved with this release:
2943 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2944 [887] math: Math library function "logb" and "nextafter" inconsistent
2945 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2946 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2947 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2948 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2950 [4404] localedata: German translation of "Alarm clock" is misleading
2951 [6799] math: nextafter() and nexttoward() doen't set errno on
2952 overflow/underflow errors
2953 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2955 [10432] nis: _nss_nis_setnetgrent assertion failure
2956 [11460] libc: fts has no LFS support
2957 [12926] network: getaddrinfo()/make_request() may spin forever
2958 [13065] nptl: Race condition in pthread barriers
2959 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2960 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2962 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2963 [14912] libc: Rename non-installed bits/*.h headers
2964 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2965 [15367] math: Let gcc use __builtin_isinf
2966 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2967 [15421] math: lgamma wrongly sets signgam for ISO C
2968 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2969 FE_INVALID with argument out of range
2970 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2972 [15786] dynamic-link: ifunc resolver functions can smash function
2974 [15918] math: Unnecessary check for equality in hypotf()
2975 [16061] localedata: Review / update transliteration data
2976 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2978 [16141] time: strptime %z offset restriction
2979 [16171] math: drem should be alias of remainder
2980 [16296] math: fegetround is pure?
2981 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2982 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2984 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2985 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2987 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2988 "Exception "Inexact" set" on ppc32
2989 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2990 [16517] math: Missing underflow exception from tanf/tan/tanl
2991 [16519] math: Missing underflow exception from sinhf
2992 [16520] math: Missing underflow exception from tanhf
2993 [16521] math: Missing underflow exception from exp2
2994 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2996 [16734] stdio: fopen calls mmap to allocate its buffer
2997 [16961] math: nan function incorrect handling of bad sequences
2998 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2999 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3000 [16985] locale: localedef: confusing error message when opening output
3002 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3003 [17197] locale: Redundant shift character in iconv conversion output at
3005 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3006 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3007 [17250] dynamic-link: static linking breaks nss loading
3008 (getaddrinfo/getpwnam/etc...)
3009 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3011 [17441] math: isnan() should use __builtin_isnan() in GCC
3012 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3013 (related to lock elision)
3014 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3015 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3016 [17887] time: strptime should be able to parse "+01:00" style timezones
3017 [17905] libc: catopen() Multiple unbounded stack allocations
3019 [18084] libc: backtrace (..., 0) dumps core on x86
3020 [18086] libc: nice() sets errno to 0 on success
3021 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3022 is too large (CVE-2015-8778)
3023 [18251] dynamic-link: SONAME missing when audit modules provides path
3024 [18265] libc: add attributes for wchar string and memory functions
3025 [18370] math: csqrt missing underflows
3026 [18421] libc: [hppa] read-only segment has dynamic relocations
3027 [18472] libc: Obsolete syscall wrappers should be compat symbols
3028 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3029 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3030 [18525] localedata: Remove locale timezone information
3031 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3032 [18568] localedata: Update locale data to Unicode 8.0
3033 [18589] locale: sort-test.sh fails at random
3034 [18595] math: ctan, ctanh missing underflows
3035 [18604] libc: assert macro-expands its argument
3036 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3037 contains a vector instruction exception.
3038 [18611] math: j1, jn missing errno setting on underflow
3039 [18618] localedata: sync Chechen locale definitions with other *_RU
3041 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3042 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3043 [18665] network: In send_dg, the recvfrom function is NOT always using the
3044 buffer size of a newly created buffer (CVE-2015-7547)
3045 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3047 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3049 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3050 [18699] math: tilegx cproj() for various complex infinities does not yield
3052 [18724] libc: Harden put*ent functions against data injection
3053 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3054 [18755] build: build errors with -DNDEBUG
3055 [18757] stdio: fmemopen fails to set errno on failure
3056 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3058 [18781] libc: openat64 lacks O_LARGEFILE
3059 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3060 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3061 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3062 [18790] math: [ldbl-128ibm] tanhl inaccurate
3063 [18795] libc: stpncpy fortification misses buffer lengths that are
3064 statically too large
3065 [18796] build: build fails for --disable-mathvec
3066 [18803] math: hypot missing underflows
3067 [18820] stdio: fmemopen may leak memory on failure
3068 [18823] math: csqrt spurious underflows
3069 [18824] math: fma spurious underflows
3070 [18825] math: pow missing underflows
3071 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3072 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3073 [18870] build: sem_open.c fails to compile with missing symbol
3075 [18872] stdio: Fix memory leak in printf_positional
3076 [18873] libc: posix_fallocate overflow check ineffective
3077 [18875] math: Excess precision leads incorrect libm
3078 [18877] libc: arm: mmap offset regression
3079 [18887] libc: memory corruption when using getmntent on blank lines
3080 [18918] localedata: hu_HU: change time to HH:MM:SS format
3081 [18921] libc: Regression: extraneous stat() and fstat() performed by
3083 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3084 binaries (CVE-2015-8777)
3085 [18951] math: tgamma missing underflows
3086 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3088 [18953] localedata: lt_LT: change currency symbol to the euro
3089 [18956] math: powf inaccuracy
3090 [18961] math: [i386] exp missing underflows
3091 [18966] math: [i386] exp10 missing underflows
3092 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3093 [18969] build: multiple string test failures due to missing locale
3095 [18970] libc: Reference of pthread_setcancelstate in libc.a
3096 [18977] math: float / long double Bessel functions not in XSI POSIX
3097 [18980] math: i386 libm functions return with excess range and precision
3098 [18981] math: i386 scalb*, ldexp return with excess range and precision
3099 [18982] stdio: va_list and vprintf
3100 [18985] time: Passing out of range data to strftime() causes a segfault
3102 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3103 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3104 [19012] locale: iconv_open leaks memory on error path
3105 [19016] math: clog, clog10 inaccuracy
3106 [19018] nptl: Mangle function pointers in tls_dtor_list
3107 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3108 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3109 [19048] malloc: malloc: arena free list can become cyclic, increasing
3111 [19049] math: [powerpc] erfc incorrect zero sign
3112 [19050] math: [powerpc] log* incorrect zero sign
3113 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3114 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3115 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3116 [19074] network: Data race in _res_hconf_reorder_addrs
3117 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3118 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3119 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3121 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3123 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3124 [19086] manual: posix_fallocate64 documented argument order is wrong.
3125 [19088] math: lround, llround missing exceptions close to overflow
3127 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3128 [19095] math: dbl-64 lrint incorrect for 64-bit long
3129 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3130 [19124] dynamic-link: ld.so failed to build with older assmebler
3131 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3132 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3133 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3134 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3135 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3136 pthread_setaffinity_np
3137 [19156] math: [ldbl-128] j0l spurious underflows
3138 [19164] nptl: tst-getcpu fails with many possible CPUs
3139 [19168] math: math/test-ildoubl and math/test-ldouble failure
3140 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3141 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3143 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3144 (FE_NOMASK_ENV) do not clear SSE exceptions
3145 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3146 _int_new_arena/reused_arena
3147 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3148 [19201] math: dbl-64 remainder incorrect sign of zero result
3149 [19205] math: bits/math-finite.h conditions do not match math.h and
3151 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3152 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3153 for C99-based standards
3154 [19212] libc: features.h not -Wundef clean
3155 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3157 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3158 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3159 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3161 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3162 "inexact" exceptions
3163 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3165 [19242] libc: strtol incorrect in Turkish locales
3166 [19243] malloc: reused_arena can pick an arena on the free list, leading
3167 to an assertion failure and reference count corruption
3168 [19253] time: tzset() ineffective when temporary TZ did not include DST
3170 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3171 [19270] math: [hppa] Shared libm missing __isnanl
3172 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3173 MAP_HUGETLB and MAP_STACK defines
3174 [19313] nptl: Wrong __cpu_mask for x32
3175 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3176 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3177 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3178 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3179 [19363] time: x32: times() return value wrongly truncates/sign extends
3181 [19367] dynamic-link: Improve branch prediction on Silvermont
3182 [19369] network: Default domain name not reset by res_ninit when "search"
3183 / "domain" entry is removed from resolv.conf
3184 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3186 [19385] localedata: bg_BG: time separator should be colon, not comma
3187 [19408] libc: linux personality syscall wrapper may erroneously return an
3188 error on 32-bit architectures
3189 [19415] libc: dladdr returns wrong names on hppa
3190 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3191 IBM905, IBM907, and IBM909
3192 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3193 [19443] build: build failures with -DDEBUG
3194 [19451] build: Make check fails on test-double-vlen2
3195 [19462] libc: Glibc failed to build with -Os
3196 [19465] math: Wrong code with -Os
3197 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3199 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3201 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3202 [19486] math: S390: Math tests fail with "Exception Inexact set".
3203 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3204 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3206 [19590] math: Fail to build shared objects that use libmvec.so functions.
3210 * The following bugs are resolved with this release:
3212 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3213 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3214 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3215 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3216 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3217 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3218 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3219 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3220 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3221 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3222 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3223 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3224 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3225 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3226 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3227 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3228 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3229 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3230 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3231 18657, 18676, 18694, 18696, 18887.
3233 * Cache information can be queried via sysconf() function on s390 e.g. with
3234 _SC_LEVEL1_ICACHE_SIZE as argument.
3236 * A buffer overflow in gethostbyname_r and related functions performing DNS
3237 requests has been fixed. If the NSS functions were called with a
3238 misaligned buffer, the buffer length change due to pointer alignment was
3239 not taken into account. This could result in application crashes or,
3240 potentially arbitrary code execution, using crafted, but syntactically
3241 valid DNS responses. (CVE-2015-1781)
3243 * The time zone file parser has been made more robust against crafted time
3244 zone files, avoiding heap buffer overflows related to the processing of
3245 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3246 large time zone data files. Overly long time zone specifiers in the TZ
3247 variable no longer result in stack overflows and crashes.
3249 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3250 for LD and GD on x86 and x86-64, has been implemented. You will need
3251 binutils-2.24 or later to enable this optimization.
3253 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3254 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3255 Hat). These updates cause user visible changes, such as the fix for bug
3258 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3259 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3260 condition in some applications.
3262 * Added vector math library named libmvec with the following vectorized x86_64
3263 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3265 The library can be disabled with --disable-mathvec. Use of the functions is
3266 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3267 Shared library libmvec.so is linked in as needed when using -lm (no need to
3268 specify -lmvec explicitly for not static builds).
3269 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3271 * A new fmemopen implementation has been added with the goal of POSIX
3272 compliance. The new implementation fixes the following long-standing
3273 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3274 old implementation is still present for use be by existing binaries.
3276 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3277 releases. It has been fixed to match 2.19 and older, but binaries built
3278 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3280 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3281 Contributed by Roland McGrath (Google).
3283 * The header <regexp.h> is deprecated, and will be removed in a future
3284 release. Use of this header will trigger a deprecation warning.
3285 Application developers should update their code to use <regex.h> instead.
3287 This header was formerly part of SUS, but was deprecated in 1994 and
3288 removed from the standard in 2001. Also, the glibc implementation
3289 leaks memory. See BZ#18681 for more details.
3293 * The following bugs are resolved with this release:
3295 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3296 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3297 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3298 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3299 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3300 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3301 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3302 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3303 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3304 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3307 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3308 too little memory for the to-be-scanned arguments and overflow the
3309 allocated buffer. The implementation now correctly computes the required
3310 buffer size when using malloc, and switches to malloc from alloca as
3313 * A new semaphore algorithm has been implemented in generic C code for all
3314 machines. Previous custom assembly implementations of semaphore were
3315 difficult to reason about or ensure that they were safe. The new version
3316 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3317 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3318 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3320 * Port to Altera Nios II has been contributed by Mentor Graphics.
3322 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3323 implementations for powerpc64/powerpc64le.
3324 Implemented by Adhemerval Zanella (IBM).
3326 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3327 and powerpc64le. This may improve lock scaling of existing programs on
3328 HTM capable systems. The lock elision code is only enabled with
3329 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3330 powerpc will issue a transaction abort on every syscall to avoid side
3331 effects being visible outside transactions.
3333 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3334 AArch64. Contributed by ARM Ltd.
3336 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3338 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3339 under certain input conditions resulting in the execution of a shell for
3340 command substitution when the application did not request it. The
3341 implementation now checks WRDE_NOCMD immediately before executing the
3342 shell and returns the error WRDE_CMDSUB as expected.
3344 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3345 processing format strings with a large number of format specifiers.
3347 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3348 infinite loop if the DNS response contained a PTR record of an unexpected
3351 * The minimum GCC version that can be used to build this version of the GNU
3352 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3353 still be used to compile programs using the GNU C Library.
3355 * The GNU C Library is now built with -Werror by default. This can be
3356 disabled by configuring with --disable-werror.
3358 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3360 * The obsolete sigvec function has been removed. This was the original
3361 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3362 programs have been using instead for about 25 years. Of course, ABI
3363 compatibility for old binaries using sigvec remains intact.
3365 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3366 with newer versions of bison.
3368 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3369 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3370 registers overlay two consecutive single-precision registers. MIPS32R2
3371 introduced a new FPU mode (FR=1) where double-precision registers extend the
3372 corresponding single-precision registers which is incompatible with the
3373 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3374 require the use of FR=1 making a transition necessary. New o32 ABI
3375 extensions enable users to migrate over time from the original o32 ABI
3376 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3377 tracks the ABI of any loaded object and verifies that new objects are
3378 compatible. Mode transitions will also be requested as required and
3379 unsupportable objects will be rejected. The ABI checks include both soft and
3380 hard float ABIs for o32, n32 and n64.
3382 GCC 5 with GNU binutils 2.25 onwards:
3383 It is strongly recommended that all o32 system libraries are built using the
3384 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3385 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3386 compiler using --with-fp-32=xx to set this by default.
3390 * The following bugs are resolved with this release:
3392 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3393 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3394 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3395 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3396 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3397 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3398 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3399 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3400 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3401 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3402 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3403 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3404 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3405 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3406 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3408 * Reverted change of ABI data structures for s390 and s390x:
3409 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3410 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3411 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3412 are preserved pointing straight to the same implementation as the old ones.
3413 Given that, new callers will simply provide a too-big buffer to these
3414 functions. Any applications/libraries out there that embed jmp_buf or
3415 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3416 against 2.19 headers will have to rebuilt again. This is necessary in any
3417 case to revert the breakage in their ABI caused by the glibc change.
3419 * Support for file description locks is added to systems running the
3420 Linux kernel. The standard file locking interfaces are extended to
3421 operate on file descriptions, not file descriptors, via the use of
3422 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3423 are associated with an open file instead of a process.
3425 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3427 * The minimum Linux kernel version that this version of the GNU C Library
3428 can be used with is 2.6.32.
3430 * Running the testsuite no longer terminates as soon as a test fails.
3431 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3432 with PASS or FAIL lines for individual tests. A summary of the results is
3433 printed, including a list of failing lists, and "make check" exits with
3434 error status if there were any unexpected failures. "make check
3435 stop-on-test-failure=y" may be used to keep the old behavior.
3437 * The am33 port, which had not worked for several years, has been removed
3440 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3441 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3442 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3443 conflicted with POSIX (support for which was removed in 2.19), the
3444 interfaces those macros enabled remain available when compiling with
3445 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3446 test macros defined.
3448 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3450 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3451 This may improve lock scaling of existing programs on TX capable systems.
3452 The lock elision code is only built with --enable-lock-elision=yes and
3453 then requires a GCC version supporting the TX builtins. With lock elision
3454 default mutexes are elided via __builtin_tbegin, if the cpu supports
3455 transactions. By default lock elision is not enabled and the elision code
3458 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3459 copy the path argument. This allowed programs to cause posix_spawn to
3460 deference a dangling pointer, or use an unexpected pathname argument if
3461 the string was modified after the posix_spawn_file_actions_addopen
3464 * All supported architectures now use the main glibc sysdeps directory
3465 instead of some being in a separate "ports" directory (which was
3466 distributed separately before glibc 2.17).
3468 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3469 On configurations that support it (all Linux configurations), it's now
3470 used regardless of the --enable-add-ons switch to configure. It is no
3471 longer possible to build such configurations without pthreads support.
3473 * Locale names, including those obtained from environment variables (LANG
3474 and the LC_* variables), are more tightly checked for proper syntax.
3475 setlocale will now fail (with EINVAL) for locale names that are overly
3476 long, contain slashes without starting with a slash, or contain ".." path
3477 components. (CVE-2014-0475) Previously, some valid locale names were
3478 silently replaced with the "C" locale when running in AT_SECURE mode
3479 (e.g., in a SUID program). This is no longer necessary because of the
3482 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3483 with application code using Intel MPX instructions. (With all previous
3484 versions, the MPX register state could be clobbered when making calls
3485 into or out of a shared library.) Note that while the new dynamic
3486 linker is compatible with all known x86 hardware whether or not it
3487 supports Intel MPX, some x86 instruction-set emulators might fail to
3488 handle the new instruction encodings. This is known to affect Valgrind
3489 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3490 release), and might affect other tools that do instruction emulation.
3492 * Support for loadable gconv transliteration modules has been removed.
3493 The support for transliteration modules has been non-functional for
3494 over a decade, and the removal is prompted by security defects. The
3495 normal gconv conversion modules are still supported. Transliteration
3496 with //TRANSLIT is still possible, and the //IGNORE specifier
3497 continues to be supported. (CVE-2014-5119)
3499 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3500 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3501 resulting a denial-of-service security vulnerability in applications which
3502 use functions related to iconv. (CVE-2014-6040)
3506 * The following bugs are resolved with this release:
3508 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3509 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3510 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3511 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3512 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3513 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3514 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3515 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3516 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3517 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3518 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3519 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3520 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3521 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3522 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3523 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3524 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3525 16431, 16453, 16474, 16506, 16510, 16529
3527 * Slovenian translations for glibc messages have been contributed by the
3528 Translation Project's Slovenian team of translators.
3530 * The public headers no longer use __unused nor __block. This change is to
3531 support compiling programs that are derived from BSD sources and use
3532 __unused internally, and to support compiling with Clang's -fblock
3533 extension which uses __block.
3535 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3536 large collation sequences to optimize multiple passes. This cache
3537 computation may overflow for large collation sequences and may cause a
3538 stack or buffer overflow. This is now fixed to use a slower algorithm
3539 which does not use a cache if there is an integer overflow.
3541 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3542 rules for large collation sequences to optimize multiple passes and falls
3543 back to alloca if malloc fails, resulting in a possible stack overflow.
3544 The implementation now falls back to an uncached collation sequence lookup
3547 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3548 initialized for static applications resulting in the security feature
3549 being disabled. The pointer guard is now correctly initialized to a
3550 random value for static applications. Existing static applications need
3551 to be recompiled to take advantage of the fix (bug 15754).
3553 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3554 to the d_name member of struct dirent, or omit the terminating NUL
3555 character. (Bugzilla #14699).
3557 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3558 aligned_alloc functions could allocate too few bytes or corrupt the
3559 heap when passed very large allocation size values (Bugzilla #15855,
3562 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3563 for AF_INET6 has been fixed (Bugzilla #16072).
3565 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3566 pap_CW, quz_PE, the_NP.
3568 * Substantially revised locales: gd_GB, ht_HT
3570 * The LC_ADDRESS field was updated to support country_car for almost all
3573 * ISO 1427 definitions were updated.
3575 * ISO 3166 definitions were updated.
3577 * The localedef utility now supports --big-endian and --little-endian
3578 command-line options to generate locales for a different system from that
3579 for which the C library was built.
3581 * Binary locale files now only depend on the endianness of the system for
3582 which they are generated and not on other properties of that system. As a
3583 consequence, binary files generated with new localedef may be incompatible
3584 with old versions of the GNU C Library, and binary files generated with
3585 old localedef may be incompatible with this version of the GNU C Library,
3586 in the following circumstances:
3588 + Locale files may be incompatible on m68k systems.
3590 + Locale archive files (but not separate files for individual locales) may
3591 be incompatible on systems where plain "char" is signed.
3593 * The configure option --disable-versioning has been removed. Builds with
3594 --disable-versioning had not worked for several years.
3596 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3597 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3599 * SystemTap probes for malloc have been introduced.
3601 * SystemTap probes for slow multiple precision fallback paths of
3602 transcendental functions have been introduced.
3604 * Support for powerpc64le has been added.
3606 * The soft-float powerpc port now supports e500 processors.
3608 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3610 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3611 set of header declarations that are enabled by default, even when other
3612 feature test macros or compiler options such as -std=c99 would otherwise
3613 disable some of those declarations.
3615 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3616 conflict with POSIX. The libbsd-compat library (which was a dummy library
3617 that did nothing) has also been removed.
3619 * Preliminary documentation about Multi-Thread, Async-Signal and
3620 Async-Cancel Safety has been added.
3622 * Change of ABI data structures for s390 and s390x:
3623 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3624 allow for future hardware extensions. All library functions that accept or
3625 return these structures were versioned in order to provide backwards
3626 compatibility with existing code. However, not all cases can be handled
3627 with interface versioning. If an application embeds either structure into
3628 another structure and that structure is passed to another compilation unit
3629 which expects the newer larger-sized object then any access to the new
3630 fields will result in undefined behaviour. Similarly any access to fields
3631 that were moved by the enlarging of the structures will cause undefined
3632 behaviour. To fix the undefined behaviour all objects that are part of the
3633 final in-memory image must agree on the size of structures, and this may
3634 require recompilation.
3638 * The following bugs are resolved with this release:
3640 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3641 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3642 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3643 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3644 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3645 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3646 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3647 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3648 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3649 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3650 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3651 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3652 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3655 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3656 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3657 Distributions can re-enable building and using pt_chown via the new configure
3658 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3659 considerable security risks and should only be used if the distribution
3660 understands and accepts the risks.
3662 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3665 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3666 fixed (Bugzilla #15330).
3668 * Add support for calling C++11 thread_local object destructors on thread
3669 and program exit. This needs compiler support for offloading C++11
3670 destructor calls to glibc.
3672 * Improved worst case performance of libm functions with double inputs and
3675 * Support for priority inherited mutexes in pthread condition variables on
3676 non-x86 architectures.
3678 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3680 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3682 * Optimized string functions for ARM. Implemented by Will Newton and
3685 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3687 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3690 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3691 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3693 * Added a benchmark framework to track performance of functions in glibc.
3695 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3696 It is based on draft TS 18661 and currently enabled as a GNU extension.
3698 * On Linux, the clock function now uses the clock_gettime system call
3699 for improved precision, rather than old times system call.
3701 * Added support for version-3 tz format files. This is needed when using
3702 the tz database release 2013e or later, and affects a few unusual cases --
3703 currently only TZ='America/Godthab' for time stamps after 2037.
3705 * Added new API functions pthread_getattr_default_np and
3706 pthread_setattr_default_np to get and set the default pthread
3707 attributes of a process.
3709 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3710 This may improve lock scaling of existing programs on TSX capable systems.
3711 When the --enable-lock-elision=yes parameter is specified at configure
3712 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3715 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3716 availability). Implemented by Ryan S. Arnold.
3718 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3722 * The following bugs are resolved with this release:
3724 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3725 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3726 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3727 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3728 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3729 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3730 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3731 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3732 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3733 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3734 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3735 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3736 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3737 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3738 14879, 14889, 14893, 14898, 14914.
3740 * Optimization of memcpy for MIPS.
3742 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3743 EMFILE has been fixed (Bugzilla #14889).
3745 * The add-on ports collection is now distributed in the "ports" subdirectory
3746 of the main GNU C Library distribution, rather than separately.
3748 * Port to ARM AArch64 contributed by Linaro.
3750 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3751 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3753 Implemented by Andreas Krebbel.
3755 * The new function secure_getenv allows secure access to the environment,
3756 returning NULL if running in a SUID/SGID process. This function replaces
3757 the internal function __secure_getenv.
3759 * SystemTap static probes have been added into the dynamic linker.
3760 Implemented by Gary Benson.
3762 * Optimizations of string functions strstr, strcasestr and memmem.
3763 Implemented by Maxim Kuvyrkov.
3765 * The minimum Linux kernel version that this version of the GNU C Library
3766 can be used with is 2.6.16.
3768 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3769 powerpc POWER7. Implemented by Will Schmidt.
3771 * New configure option --disable-nscd builds the C library such that it
3772 never attempts to contact the Name Service Caching Daemon (nscd).
3773 New configure option --disable-build-nscd avoids building nscd itself;
3774 this is the default if --disable-nscd is used.
3776 * Improved support for cross-compilation, including cross-testing and
3777 bootstrap builds without a previously built glibc.
3779 * Several testsuite tests are now able to test multiple IFUNC variants of an
3780 interface, rather than just testing the one that would be chooen by
3783 * New configure options --with-bugurl and --with-pkgversion, for
3784 distributors to use to embed their bug-reporting and package version
3785 information in --help and --version output.
3787 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3788 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3789 allows creation of chroots without the procfs mounted on /proc.
3791 * The `crypt' function now fails if passed salt bytes that violate the
3792 specification for those values. On Linux, the `crypt' function will
3793 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3794 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3795 when the mode is enabled.
3797 * The `clock_*' suite of functions (declared in <time.h>) is now available
3798 directly in the main C library. Previously it was necessary to link with
3799 -lrt to use these functions. This change has the effect that a
3800 single-threaded program that uses a function such as `clock_gettime' (and
3801 is not linked with -lrt) will no longer implicitly load the pthreads
3802 library at runtime and so will not suffer the overheads associated with
3803 multi-thread support in other code such as the C++ runtime library.
3805 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3810 * The following bugs are resolved with this release:
3812 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3813 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3814 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3815 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3816 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3817 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3818 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3819 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3820 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3821 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3822 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3823 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3824 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3825 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3826 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3827 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3828 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3829 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3830 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3831 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3832 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3833 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3836 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3837 configuring glibc with:
3838 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3839 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
3840 Implemented by H.J. Lu.
3844 + define static_assert
3846 + do not declare gets
3848 + declare at_quick_exit and quick_exit also for ISO C11
3850 + aligned_alloc. NB: The code is deliberately allows the size parameter
3851 to not be a multiple of the alignment. This is a moronic requirement
3852 in the standard but it is only a requirement on the caller, not the
3855 + timespec_get added
3857 + uchar.h support added
3859 + CMPLX, CMPLXF, CMPLXL added
3861 Implemented by Ulrich Drepper.
3863 * Support for the IA-64 has been moved to ports.
3865 * Remove support for anything but ELF binary format
3867 * Checking versions of poll, ppoll added.
3868 Implemented by Ulrich Drepper.
3870 * More generic and 64-bit performance optimizations to math functions.
3871 Implemented by Ulrich Drepper.
3873 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3874 headers and functions available at compile time as they were before
3875 version 2.14. This option will be removed at some time in the future
3876 after the TI-RPC library becomes fully sufficient for the needs of
3877 existing applications.
3879 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3880 Note that glibc is not expected to work with any Linux kernel version
3883 * New header <sys/auxv.h> and function getauxval allowing easy access to
3884 the AT_* key-value pairs passed from the Linux kernel. The header also
3885 defines the HWCAP_* bits associated with the AT_HWCAP key.
3887 * New locales: mag_IN
3889 * New configure option --enable-systemtap builds SystemTap static probes
3890 into libc for setjmp and longjmp and into libpthread for various operations.
3891 So far the setjmp/longjmp probes and some of the libpthread probes are
3892 provided only for i*86 and x86_64.
3893 Implemented by Roland McGrath and Rayson Ho.
3895 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3897 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3900 * More optimized functions for SPARC. Implemented by David S. Miller.
3902 * Improved support for cross-compilation, especially bootstrap builds
3903 without a previously built glibc.
3905 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3906 Chris Metcalf from Tilera.
3908 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3909 now supported for ARM processors.
3911 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3912 as the name of the dynamic linker, to distinguish it from the
3913 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3915 * Support for CRIS has been removed from ports.
3917 * A new class of installed header has been documented for low-level
3918 platform-specific functionality. PowerPC added the first instance with a
3919 function to provide time base register access. Contributed by Tulio
3920 Magno Quites Machado Filho.
3922 * ix86 configurations now install header files that are consistent with
3923 what x86-64 configurations install. These same header files can be used
3924 for -m32, -m64, or -mx32 builds.
3925 Contributed by H.J. Lu.
3927 * Math library bug fixes. A thorough audit of all open math library bugs was
3928 conducted by Joseph Myers. Significant progress was made on many math
3929 library bugs resulting in more accurate exceptions and function results.
3930 Many thanks to all those that contributed including Andreas Jaeger for his
3931 patch review and work on the x87 trigonometric instruction issues.
3933 * Timezone data is no longer installed. Timezone-related binaries and scripts
3934 will continue to be installed. Users should obtain their timezone data from
3935 their distribution provider or from the tzdata package at
3936 <ftp://munnari.oz.au/pub/>.
3940 * The following bugs are resolved with this release:
3942 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3943 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3944 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3945 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3946 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3947 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3948 13484, 13506, 13515, 13523, 13524, 13538, 13540
3950 * New program pldd to list loaded object of a process
3951 Implemented by Ulrich Drepper.
3953 * Add nss_db support back to glibc. No more dependency on Berkeley db
3954 and support for initgroups lookups.
3955 Implemented by Ulrich Drepper.
3957 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3958 Contributed by HJ Lu.
3960 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3961 Contributed by HJ Lu.
3963 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3964 on x86-32 and x86-64.
3965 Contributed by Liubov Dmitrieva.
3967 * Optimized strchr and strrchr for SSE on x86-32.
3968 Contributed by Liubov Dmitrieva.
3970 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3971 for x86-64 and x86-32.
3972 Contributed by Liubov Dmitrieva.
3974 * New interfaces: scandirat, scandirat64
3975 Implemented by Ulrich Drepper.
3977 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3978 Implemented by Ulrich Drepper.
3980 * nscd now also caches the netgroup database.
3981 Implemented by Ulrich Drepper.
3983 * Integrate libm with gcc's -ffinite-math-only option.
3984 Implemented by Ulrich Drepper.
3986 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3987 to math functions. Implemented by Ulrich Drepper.
3989 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3990 Implemented by Ulrich Drepper.
3992 * New Linux interfaces: process_vm_readv, process_vm_writev
3994 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3995 Implemented by Ulrich Drepper.
3997 * Optimized nearbyint and strcasecmp for PPC.
3998 Implemented by Adhemerval Zanella.
4000 * New locales: bho_IN, unm_US, es_CU, ta_LK
4004 * The following bugs are resolved with this release:
4006 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4007 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4008 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4009 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4010 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4011 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4012 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4013 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4014 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4015 12795, 12811, 12813, 12814, 12841
4017 * The RPC implementation in libc is obsoleted. Old programs keep working
4018 but new programs cannot be linked with the routines in libc anymore.
4019 Programs in need of RPC functionality must be linked against TI-RPC.
4020 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4022 Visible changes of this change include (obviously) the inability to link
4023 programs using RPC functions without referencing the TI-RPC library and the
4024 removal of the RPC headers from the glibc headers.
4025 Implemented by Ulrich Drepper.
4027 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4028 syncfs, setns, sendmmsg
4030 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4031 yue_HK, lij_IT, mhr_RU
4033 * New encodings: CP770, CP771, CP772, CP773, CP774
4035 * New program sotruss to trace calls through PLTs
4036 Implemented by Ulrich Drepper.
4038 * The malloc hook implementation is marked deprecated and will be removed
4039 from the default implementation in the next version. The design never
4040 worked ever since the introduction of threads. Even programs which do
4041 not create threads themselves can use multiple threads created internally.
4045 * The following bugs are resolved with this release:
4047 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4048 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4049 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4050 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4053 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4055 * POWER7 optimizations: memset, memcmp, strncmp
4057 * New optimized string functions for x86-64: strnlen (SSE2),
4058 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4059 Implemented by Ulrich Drepper.
4063 * The following bugs are resolved with this release:
4065 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4066 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4067 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4068 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4069 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4070 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4071 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4072 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4074 * New interfaces: pthread_getname_np, pthread_setname_np
4076 * New Linux interface: recvmmsg
4078 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4080 * The dynamic linker now recognizes supported ABI versions from the
4081 EI_ABIVERSION field in the ELF header.
4082 Implemented by Ulrich Drepper.
4084 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4085 will not be used to fill in password fields in the passwd.byname replies.
4086 Instead it is used to synthesize the shadow.byname table, should it be
4087 missing. This is a useful mode in some installations involving Solaris.
4088 Implemented by Ulrich Drepper.
4090 * New locales: kok_IN, sq_MK, cv_RU
4094 * The following bugs are resolved with this release:
4096 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4097 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4098 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4099 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4100 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4101 10789, 10817, 10823, 10840, 10847
4103 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4105 Implemented by Ulrich Drepper.
4107 * Checking version of longjmp added that fails if an uninitialized stack
4108 frame would be created. Implemented by Ulrich Drepper.
4110 * STT_GNU_IFUNC is now supported in static executables.
4111 Implemented by H.J. Lu.
4113 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4115 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4116 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4117 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4118 Contributed by H.J. Lu.
4120 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4121 Implemented by Ulrich Drepper.
4123 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4125 Contributed by H.J. Lu.
4127 * Support for fma instruction in AVX on x86-64.
4128 Implemented by H.J. Lu and Ulrich Drepper.
4130 * AVX support in x86-64 auditing support in ld.so.
4131 Implemented by H.J. Lu.
4133 * STB_GNU_UNIQUE support added.
4134 Implemented by Ulrich Drepper.
4136 * Implement second fallback mode for optimized DNS lookup for even more
4137 broken environments. If two requests from the same port are not
4138 handled correctly close the socket and open a new one before sending
4139 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4140 can be used to select this mode right away, instead of rediscovering the
4141 necessity is every process again.
4142 Implemented by Ulrich Drepper.
4144 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4145 Implemented by Adam Tkac.
4147 * Optimized iconv conversions for S390x.
4148 Implemented by Andreas Krebbel.
4150 * Using condvars with PI mutexes is now more efficient due to kernel
4151 support for requeueing to PI futexes. NPTL support added for x86-64.
4152 Implemented by Ulrich Drepper.
4154 * New locales: ps_AF, my_MM
4158 * The following bugs are resolved with this release:
4160 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4161 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4162 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4163 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4164 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4166 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4167 Implemented by Ulrich Drepper.
4169 * New Linux interfaces: accept4, fallocate, fallocate64.
4170 Implemented by Ulrich Drepper.
4172 * Correct declarations of string function when used in C++ code. This
4173 could lead to compile errors for invalid C++ code.
4175 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4178 * New POSIX 2008 interface: psiginfo
4179 Implemented by Ulrich Drepper.
4181 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4182 Implemented by Ulrich Drepper.
4184 * Support for selecting between multiple function definitions at runtime
4185 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4187 * The libcrypt library can now use the hash function implementations in
4188 NSS. Implemented by Ulrich Drepper.
4190 * The malloc implementation can be compiled to be less memory efficient
4191 but higher performing in multi-threaded programs.
4192 Implemented by Ulrich Drepper.
4194 * New locales: nan_TW@latin, ks_IN
4196 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4197 Implemented by Ulrich Drepper.
4199 * Extended printf hook support. It is possible to use user-defined types
4200 and extend existing format specifiers.
4201 Implemented by Ulrich Drepper.
4203 * Handling for group shadow files has been added.
4204 Implemented by Ulrich Drepper.
4206 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4207 servers (the case, e.g., for some people using the built-in DNS
4208 server in ADSL modems/routers). There is a once-per-process timeout
4209 in case of a broken server. To avoid it, users can run nscd or put
4210 'options single-request' in /etc/resolv.conf.
4211 Implemented by Ulrich Drepper.
4215 * The following bugs are resolved with this release:
4217 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4218 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4219 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4220 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4221 6968, 6974, 6980, 6995, 7008, 7009, 7029
4223 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4224 up at the same time. Implemented by Ulrich Drepper.
4226 * TLS descriptors for LD and GD on x86 and x86-64.
4227 Implemented by Alexandre Oliva.
4229 * getaddrinfo now handles DCCP and UDPlite.
4230 Implemented by Ulrich Drepper.
4232 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4233 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4234 Implemented by Ulrich Drepper.
4236 * New implementation of memmem, strstr, and strcasestr which is O(n).
4237 Implemented by Eric Blake.
4239 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4241 * Implement "e" option for popen to open file descriptor with the
4242 close-on-exec flag set. Implemented by Ulrich Drepper.
4244 * Implement "b" mode for fmemopen. In this mode writes writes don't
4245 implicitly add a NUL byte and seeks from the end of the buffer really
4246 use the buffer end, not the string length as the basis.
4247 Implemented by Ulrich Drepper.
4249 * Many functions, exported and internal, now atomically set the close-on-exec
4250 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4252 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4254 Implemented by Pravin Satpute.
4256 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4260 * The following bugs are resolved with this release:
4262 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4263 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4264 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4265 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4266 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4267 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4268 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4270 * New locales: bo_CN, bo_IN, shs_CA.
4272 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4274 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4275 Implemented by Pravin Satpute.
4277 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4279 * nscd caches now all timeouts for DNS entries
4280 Implemented by Ulrich Drepper.
4282 * nscd is more efficient and wakes up less often.
4283 Implemented by Ulrich Drepper.
4285 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4286 vdprintf, and obstack_vprintf.
4287 Implemented by Jakub Jelinek.
4289 * Faster memset for x86-64.
4290 Implemented by Harsha Jagasia and H.J. Lu.
4292 * Faster memcpy on x86.
4293 Implemented by Ulrich Drepper.
4295 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4296 Implemented by Ulrich Drepper.
4298 * Faster sqrt and sqrtf implemention for some PPC variants.
4299 Implemented by Steven Munroe.
4303 * The following bugs are resolved with this release:
4305 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4306 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4307 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4308 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4309 5071, 5103, 5104, 5112, 5113, 5184, 5186
4311 * More checking functions: fread, fread_unlocked, open*, mq_open.
4312 Implemented by Jakub Jelinek and Ulrich Drepper.
4314 * Extend fortification to C++. Implemented by Jakub Jelinek.
4316 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4317 by not recognizing 'a' as a modifier when those specs are requested.
4318 Implemented by Jakub Jelinek.
4320 * PPC optimizations to math and string functions.
4321 Implemented by Steven Munroe.
4323 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4324 options to be passed. Implemented by Ulrich Drepper.
4326 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4328 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4329 Implemented by Ulrich Drepper.
4331 * Handle private futexes in the NPTL implementation.
4332 Implemented by Jakub Jelinek and Ulrich Drepper.
4334 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4335 Implemented by Roland McGrath and Ulrich Drepper.
4337 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4339 * SHA-256 and SHA-512 based password encryption.
4340 Implemented by Ulrich Drepper.
4342 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4343 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4346 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4347 Implemented by Ulrich Drepper.
4351 * The following bugs are resolved with this release:
4353 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4354 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4355 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4356 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4357 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4358 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4359 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4362 * New Linux interfaces: epoll_pwait, sched_getcpu.
4364 * New generic interfaces: strerror_l.
4366 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4370 * The following bugs are resolved with this release:
4372 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4373 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4374 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4375 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4376 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4377 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4378 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4379 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4380 3225, 3251, 3252, 3253, 3273
4382 * For Linux, the sorting of addresses returned by getaddrinfo now also
4383 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4384 Implemented by Ulrich Drepper.
4386 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4387 Implemented by Ulrich Drepper.
4389 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4391 * New iconv module for MIK. Contributed by Alexander Shopov.
4393 * For sites with broken group and/or passwd database, the auto-propagate
4394 option of nscd can prevent creating ID lookup entries from the results
4395 of a name lookup and vice versa. This usually is no problem but some
4396 site might have problems with the default behavior.
4397 Implemented by Ulrich Drepper.
4399 * Iterating over entire database in NIS can be slow. With the
4400 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4401 to trade time for memory. The entire database will be read at once.
4402 Implemented by Ulrich Drepper.
4404 * The interfaces introduced in RFC 3542 have been implemented by
4407 * Support for the new ELF hash table format was added by Ulrich Drepper.
4409 * Support for priority inheritance mutexes added by Jakub Jelinek and
4412 * Support for priority protected mutexes added by Jakub Jelinek.
4414 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4415 or_IN, csb_PL, fy_NL, sr_ME.
4419 * More overflow detection functions.
4421 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4422 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4424 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4425 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4426 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4427 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4428 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4429 by Masahide Washizawa.
4431 * It is now possible to install audit libraries for the dynamic linker using
4432 LD_AUDIT. Implemented by Ulrich Drepper.
4434 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4435 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4436 For a libc and libpthread that works well on Linux 2.4 kernels, we
4437 recommend using the stable 2.3 branch.
4439 * The new function open_wmemstream acts like open_memstream,
4440 but uses a wchar_t wide character buffer.
4442 * The new function ppoll is an improved version of poll, similar to pselect.
4444 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4445 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4446 renameat, unlinkat, linkat, symlinkat, readlinkat.
4448 * New Linux kernel system calls: unshare,
4449 inotify_init, inotify_add_watch, inotify_rm_watch.
4451 * The euidaccess function is now also known by the alias eaccess,
4452 for compatibility with some other systems.
4454 * Timezone data updated to 2006b version.
4458 * The following bugs are resolved with this release:
4460 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4461 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4462 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4463 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4464 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4465 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4467 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4469 * As of this release, GCC 4 can be used to compile the C Library.
4471 * Timezone data updated to 2005m version.
4475 * The following bugs are resolved with this release:
4477 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4478 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4479 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4480 777, 787, 821, 822, 823, 825
4482 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4486 * Support for RFC 3678. Real implementations exist only for Linux so far.
4487 Implemented by Ulrich Drepper.
4489 * nscd can now cache entries persistently. Expiring entries are reloaded.
4490 For speedups the cache can be shared in memory with client processes.
4491 Implemented by Ulrich Drepper.
4493 * nscd can now perform SELinux checks.
4494 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4496 * getaddrinfo queries are now cached. Canonical name lookup is performed
4498 Implemented by Ulrich Drepper.
4500 * The nothrow function attribute is used when headers are used by gcc when
4501 compiling C code. This can avoid significant amounts of exception
4504 * The malloc functions perform more error checking and are stricter when
4505 it comes to reacting on errors. The default action is to terminate
4506 the process after showing an error message. Implemented by Ulrich Drepper.
4508 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4509 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4511 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4512 namespaces using the new function dlmopen(). This feature is of course,
4513 like most other dynamic loading functionality, not available in statically
4514 linked applications. Implemented by Ulrich Drepper.
4516 * Low-overhead boundary checking variants of string and some stdio functions
4517 were added. These are to be used in conjunction with a gcc patch by
4518 Jakub Jelinek which adds calls to these functions if possible.
4519 Implemented by Jakub Jelinek and Ulrich Drepper.
4521 * Old code for several operating systems and machine architectures that
4522 have not been in working condition in a long time have been removed from
4523 the main source tree maintained by the GNU C Library's maintainers.
4524 These files are now reside in the separate `ports' source module
4525 that is usable as an add-on when building the library.
4529 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4530 interrogate the dynamic linker, compatible with the Solaris interface.
4532 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4533 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4535 * getifaddrs now uses the netlink interface on Linux to get its information.
4536 Implemented by Thorsten Kukuk.
4538 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4539 Implemented by Ulrich Drepper.
4541 * support for non-executable stacks on x86 has been added. Changes mostly
4544 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4547 * getaddrinfo now performs destination address selection according to
4552 * Thread-safe interfaces for many functions that access locale data
4553 were added in version 2.3, but these features were omitted from NEWS.
4554 Many functions have variants with an `_l' suffix that take a `locale_t'
4555 object as a parameter rather than consulting the current locale.
4556 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4557 create and maintain `locale_t' objects. Additionally, the new function
4558 `uselocale' sets "the current locale" (as used by functions not so
4559 parameterized) set for an individual thread. These features were added
4560 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4562 * The functions getresuid, getresgid, setresuid, and setresgid, which
4563 have long been available on Linux, are now declared in <unistd.h>
4564 and are now also available on the Hurd.
4566 * ELF thread-local storage support (TLS) now works on x86-64.
4568 * The new dynamic string token $LIB is expanded in shared library names.
4569 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4571 * Aldy Hernandez contributed complete software floating point support for
4572 PowerPC machines with no FPU.
4574 * fexecve is implemented on Linux.
4576 * The `btowc' function should work at least twice as fast due to
4577 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4579 * With approriate thread add-ons cancelable functions are now implemented
4580 in libc.so as well. No need to call the function in libpthread. This
4581 change allowed to finally disable the incorrect and expensive handling
4582 of weak definition in ld.so.
4584 * Yet more PLT entries in libc.so have been removed. We finally arrived
4585 at the bare minimum. Startup times improved appropriately.
4587 * Support for the new Linux/x86 system call interface was added. The
4588 AT_SYSINFO auxiliary vector entry is recognized and handled.
4592 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4595 * iconv (the program and the interface) now accepts empty names (excluding
4596 options like //TRANSLIT) to mean "use charset of current locale".
4598 * localedef can now transliterate characters in strings which are not in
4599 the provided charmap. The information from the input locale is used.
4601 * Prelinking support was added for ELF targets. This requires additional
4602 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4604 * Read-only stdio streams now use mmap to speed up operation by eliminating
4605 copying and buffer underflows. To use add 'm' to the mode string of
4606 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4608 * The malloc functions were completely rewritten by Wolfram Gloger based
4609 on Doug Lea's malloc-2.7.0.c.
4611 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4612 implementation of regex.
4614 * Bruno Haible upgraded the iconv and locale implementation to support
4617 * Contents of the LC_* and LANG environment variables in the CEN style are
4618 not recognized anymore. It never was used. Change by Ulrich Drepper.
4620 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4621 thread-local storage (TLS) ABI on some platforms.
4622 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4624 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4625 EUC-JISX0213, and TSCII.
4627 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4628 BSD-compatible interface for getting all network interface addresses.
4629 Implementation for IPv4 by Roland McGrath.
4631 * Loading of locale data is faster due to the introduction of a locale
4632 archive. Implemented by Roland McGrath and Ulrich Drepper.
4634 * Startup times are significantly reduced by not using exported functions
4635 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4638 * Steven Munroe contributed a port to PowerPC64/Linux.
4642 * The Hurd now uses the GNU libio implementation of stdio rather than the
4643 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4645 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4646 with the same behavior as the Linux system call of the same name.
4650 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4651 128-bit long double format.
4653 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4654 IBM1161, and IBM1162 charsets.
4656 * Andreas Jaeger contributed a port to x86-64/Linux.
4658 * Peter Bruin contributed a port to PowerPC/Hurd.
4660 * libc functions using I/O streams now can handle wide-oriented streams
4663 * optimizations in the dynamic linker. Binaries created by recent binutils
4664 versions start up quicker due to reduced time spent on relocations.
4666 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4670 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4671 asinh, atanh, j0 for the 128-bit long double format.
4673 * Bruno Haible updated all the code handling Unicode in some form to
4674 support Unicode 3.1.
4676 * Speed of regex for single-byte locales is back to previous levels.
4677 Patch by Isamu Hasegawa.
4679 * Alpha, SPARC, and IA-64 now also using floating stacks.
4681 * Startup time of internationalized applications greatly improved through
4682 iconv cache. Use iconvconfig to generate the cache file.
4683 Contributed by Ulrich Drepper.
4685 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4686 severe performance problems. Patch by David Mosberger.
4688 * The Hurd port got a lot more functionality like AIO, various stdio
4689 extensions, etc. Mainly done by Roland McGrath.
4691 * mtrace can now lookup symbols in shared libraries.
4695 * Intel's IA-64 math library is largely integrated. It provides fast and
4696 accurate implementatations for most basic and standard math functions
4697 in float, double, and long double format.
4699 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4700 and asin for the 96-bit long double format and asin, log, tan for the
4701 128-bit long double format.
4703 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4704 The basic double functions exist today. Contributed by Abraham Ziv
4705 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4706 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4708 * An asynchronous name lookup library was added. The interface is designed
4709 after POSIX AIO. The proposal was circulated beforehand to get comments.
4710 No negative ones came in. Implemented by Ulrich Drepper.
4712 * Port to S390/64bit contributed by Martin Schwidefsky
4713 <schwidefsky@de.ibm.com>.
4715 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4716 of functions for Linux/IA-64.
4718 * The RPC code is now thread safe. Threads can now use the same service
4719 of different services at the same time. Patch by Eric Norum
4720 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4722 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4723 family of functions for Linux/S390.
4725 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4726 of functions for Linux/x86.
4728 * Port to Linux/CRIS contributed by Axis Communications.
4732 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4733 we can now check for namespace violations and missing declarations. The
4734 result is that almost all headers are now Unix-compliant (as defined in
4735 the upcoming XPG6). The negative side is that some programs might need
4736 corrections, too, if they depend on the incorrect form of the headers in
4737 previous versions which defined too many symbols and included too many
4740 * regex now handles multibyte character sets correctly.
4741 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4743 * iconv (the program) does now conform to the upcoming XPG6 and handles
4744 charmaps. Instead of the charset names the path of charmaps can be
4745 provided and the conversion happens based on this data.
4746 Contributed by Ulrich Drepper.
4748 * The locale program now provides detailed information about the installed
4753 only lists the names of the supported locales
4757 provides details such as country, language, and codeset name.
4758 Contributed by Ulrich Drepper.
4762 * The gencat program now parses the input file according to the charset
4763 selected by the LC_CTYPE category. This is important for stateful
4764 character sets. To make generating catalogs easier there is a way
4765 to overwrite the charset selected by the locale: before the first
4766 message or $ quote line the catalog can contain a line like
4768 $ codeset=ISO-8859-2
4770 to select the charset (ISO-8859-2 in this case).
4772 Implemented by Shinya Hanataka and Ulrich Drepper.
4774 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4775 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4776 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4778 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4779 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4781 * The LANGUAGE environment variable is now ignored unless the locale is
4782 changed from the default "C" locale.
4784 * The usual bug fixes.
4788 * Greg McGary added runtime support for bounds checking using gcc's
4789 new -fbounded-pointers option. ix86 target is complete. PowerPC
4792 * Thorsten Kukuk added secure mode support to nscd.
4794 * The Berkeley db libraries have been removed.
4796 Related, the nss_db module is now in a separate package since it
4797 obviously requires a database library being available.
4799 * Wide character I/O streams implemented by Ulrich Drepper.
4801 * Functions from the extended socket API added by Ulrich Drepper.
4803 * Functions feenableexcept and fedisableexcept to control the
4804 behaviour of individual exceptions have been added by Andreas Jaeger.
4806 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4808 * The resolver code has been updated from bind 8.2.3-T5B which supports
4809 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4812 This change could in some situations effect backward compatibility. Since
4813 now `_res' is a thread-local instead of a global variable, modifying it
4814 in one thread does not have any effect in other threads.
4816 The resolver library was also extended to allow IPv6 as the transport
4817 protocol for the requests. This work was done by Stig Venaas.
4819 * Compatibility code for K&R C compilers has been removed from the
4820 header files. A ISO C compiler is needed to use the library
4821 (conforming to either C89 or C99 standard).
4823 * Complete rewrite of the localedef program to support multibyte character
4824 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4825 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4826 Implemented by Ulrich Drepper.
4828 Bruno Haible significantly improved the generation and use of the data
4829 structures for the wide character tables.
4831 * Plural handling in gettext implemented by Ulrich Drepper.
4833 * The utmp daemon has been removed.
4835 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4837 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4840 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4842 * POSIX barriers implemented by Kaz Kylheku.
4844 * POSIX spawn function family implemented by Ulrich Drepper.
4846 * POSIX spinlocks are now available.
4848 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4850 * the configure option --enable-kernel=X.Y.Z allows to strip out
4851 compatibility for kernel versions before X.Y.Z. This is currently only
4852 implemented for Linux.
4854 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4855 field sin6_scope_id. This means that all programs using IPv6 should be
4856 recompiled. Don't expect binary compatibility with previous glibc
4859 * various conversion modules for IBM character sets contributed by
4862 * IA-64 port by Jes Sorensen and HJ Lu.
4876 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4878 * New xdr functions are added; some rpc functions are now 64bit clean.
4880 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4882 * Fixed known incompatibilities with glibc 2.0.
4884 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4886 * Optimized a number of functions (especially the ELF dynamic loader).
4888 * Update timezone data files.
4890 * lots of charmaps corrections
4892 * some new locale definitions and charmaps
4897 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4898 conform to POSIX member type requirements. Symbol versions have been
4899 adjusted as needed within the library, and for direct use by applications,
4900 but there is potential for problems if third-party libraries use
4901 struct timeval as part of their interface. This does not present
4902 a problem for X and other "essential" system libraries.
4904 * An additional locale model to support C++ Standard Library locale
4905 model and probably more was implemented by Ulrich Drepper.
4907 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4910 * Miles Bader provided the `argp' function family to support hierachical
4911 command line argument parsing, layered on top of getopt.
4913 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4915 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4918 * scanf recognizes the %a and %A format for scanning floating point numbers.
4920 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4921 information and interfaces for the available integer types.
4923 * about 130 new math functions were added to implement the ISO C9x math
4926 * the new header <complex.h> contains definitions of the complex math
4927 functions from ISO C 9X.
4929 * the new header <tgmath.h> defines generic macros to use complex or
4930 real valued functions.
4932 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4934 * Andreas Jaeger provided a test suite for the math library.
4936 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4938 * Ulrich Drepper added character set conversion functions (iconv).
4940 * Optimized string functions have been added.
4942 * The localedata addon is now part of glibc.
4944 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4946 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4947 daemon for NSS (nscd).
4949 Missing a better place here are some numbers on improvements. Under
4950 Linux 2.1.125 un-tar-ing the kernel sources takes
4954 using local files 12.19s 6.88s 22.91s
4956 using NIS 13.92s 8.91s 26.34s
4958 using NIS & nscd 10.37s 7.34s 25.30s
4960 using NIS+ 27.57s 30.37s 640.46s
4962 using NIS+ & nscd 10.25s 7.83s 26.51s
4964 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4966 Keep in mind that non-namelookup related operations dominate above times.
4967 It was just a common complain that using NIS+ unpacking the kernel is
4970 [1] The old nscd implementation is not available anymore since it was
4971 distributed with glibc up to version 2.0.98 and thus is now replaced.
4973 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4975 * Mark Kettenis provided a Hesiod NSS module.
4977 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4978 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4980 * rcmd can now handle netgroups (Dick Streefland).
4982 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4985 * Support for the IPv6 protocol has been added to the socket API, as per the
4986 latest draft standards.
4988 * Support for Linux 2.2 has been added.
4990 * Interface changes relative to the latest 2.0.x release:
4991 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4992 addseverity NEW: Unix98
4993 alphasort64 NEW: LFS
4994 argp_err_exit_status NEW: argp, GNU ext
4995 argp_error NEW: argp, GNU ext
4996 argp_failure NEW: argp, GNU ext
4997 argp_help NEW: argp, GNU ext
4998 argp_parse NEW: argp, GNU ext
4999 argp_program_bug_address NEW: argp, GNU ext
5000 argp_program_version NEW: argp, GNU ext
5001 argp_program_version_hook NEW: argp, GNU ext
5002 argp_state_help NEW: argp, GNU ext
5003 argp_usage NEW: argp, GNU ext
5004 authdes_create NEW: Secure RPC
5005 authdes_getucred NEW: Secure RPC
5006 authdes_pk_create NEW: Secure RPC
5007 backtrace NEW: GNU ext.
5008 backtrace_symbols NEW: GNU ext.
5009 backtrace_symbols_fd NEW: GNU ext.
5011 cacosf NEW: ISO C 9x
5012 cacosh NEW: ISO C 9x
5013 cacoshf NEW: ISO C 9x
5014 cacoshl NEW: ISO C 9x
5015 cacosl NEW: ISO C 9x
5022 casinf NEW: ISO C 9x
5023 casinh NEW: ISO C 9x
5024 casinhf NEW: ISO C 9x
5025 casinhl NEW: ISO C 9x
5026 casinl NEW: ISO C 9x
5028 catanf NEW: ISO C 9x
5029 catanh NEW: ISO C 9x
5030 catanhf NEW: ISO C 9x
5031 catanhl NEW: ISO C 9x
5032 catanl NEW: ISO C 9x
5033 cbc_crypt NEW: Secure RPC
5037 ccoshf NEW: ISO C 9x
5038 ccoshl NEW: ISO C 9x
5044 cimagf NEW: ISO C 9x
5045 cimagl NEW: ISO C 9x
5046 clearerr_locked REMOVED
5047 clntunix_create NEW: sunrpc ext
5049 clog10 NEW: ISO C 9x
5050 clog10f NEW: ISO C 9x
5051 clog10l NEW: ISO C 9x
5061 cprojf NEW: ISO C 9x
5062 cprojl NEW: ISO C 9x
5064 crealf NEW: ISO C 9x
5065 creall NEW: ISO C 9x
5070 csinhf NEW: ISO C 9x
5071 csinhl NEW: ISO C 9x
5074 csqrtf NEW: ISO C 9x
5075 csqrtl NEW: ISO C 9x
5079 ctanhf NEW: ISO C 9x
5080 ctanhl NEW: ISO C 9x
5082 des_setparity NEW: Secure RPC
5083 ecb_crypt NEW: Secure RPC
5084 endutxent NEW: Unix98
5086 exp10f NEW: ISO C 9x
5087 exp10l NEW: ISO C 9x
5091 fattach NEW: STREAMS
5092 fdetach NEW: STREAMS
5096 feclearexcept NEW: ISO C 9x
5097 fegetenv NEW: ISO C 9x
5098 fegetexceptflag NEW: ISO C 9x
5099 fegetround NEW: ISO C 9x
5100 feholdexcept NEW: ISO C 9x
5102 feraiseexcept NEW: ISO C 9x
5103 ferror_locked REMOVED
5104 fesetenv NEW: ISO C 9x
5105 fesetexceptflag NEW: ISO C 9x
5106 fesetround NEW: ISO C 9x
5107 fetestexcept NEW: ISO C 9x
5108 feupdateenv NEW: ISO C 9x
5109 fflush_locked REMOVED
5113 fgets_unlocked NEW: GNU ext.
5114 fileno_locked REMOVED
5126 fputc_locked REMOVED
5127 fputs_unlocked NEW: GNU ext.
5128 fread_unlocked NEW: GNU ext.
5133 fstatvfs NEW: Unix98
5137 ftruncate64 NEW: LFS
5139 fwrite_unlocked NEW: GNU ext.
5140 gai_strerror NEW: IPv6
5144 getchar_locked REMOVED
5146 getdate_err NEW: Unix98
5147 getdate_r NEW: GNU ext.
5149 getnameinfo NEW: IPv6
5150 getnetname NEW: Secure RPC
5151 getpmsg NEW: STREAMS
5152 getpt NEW: Unix98 PTY
5153 getrlimit64 NEW: LFS
5154 getutxent NEW: Unix98
5155 getutxid NEW: Unix98
5156 getutxline NEW: Unix98
5157 glob64 NEW: GNU ext.
5158 globfree64 NEW: GNU ext.
5159 gnu_get_libc_release NEW: GNU ext.
5160 gnu_get_libc_version NEW: GNU ext.
5161 grantpt NEW: Unix98 PTY
5162 host2netname NEW: Secure RPC
5164 iconv_close NEW: iconv
5165 iconv_open NEW: iconv
5166 if_freenameindex NEW: IPv6
5167 if_indextoname NEW: IPv6
5168 if_nameindex NEW: IPv6
5169 if_nametoindex NEW: IPv6
5170 in6addr_any NEW: IPv6
5171 in6addr_loopback NEW: IPv6
5172 inet6_isipv4mapped NEW: IPv6
5173 isastream NEW: STREAMS
5174 iswblank NEW: GNU ext.
5175 key_decryptsession NEW: Secure RPC
5176 key_decryptsession_pk NEW: Secure RPC
5177 key_encryptsession NEW: Secure RPC
5178 key_encryptsession_pk NEW: Secure RPC
5179 key_gendes NEW: Secure RPC
5180 key_get_conv NEW: Secure RPC
5181 key_secretkey_is_set NEW: Secure RPC
5182 key_setnet NEW: Secure RPC
5183 key_setsecret NEW: Secure RPC
5184 llrint NEW: ISO C 9x
5185 llrintf NEW: ISO C 9x
5186 llrintl NEW: ISO C 9x
5187 llround NEW: ISO C 9x
5188 llroundf NEW: ISO C 9x
5189 llroundl NEW: ISO C 9x
5194 lrintf NEW: ISO C 9x
5195 lrintl NEW: ISO C 9x
5196 lround NEW: ISO C 9x
5197 lroundf NEW: ISO C 9x
5198 lroundl NEW: ISO C 9x
5200 makecontext NEW: Unix98
5201 mempcpy NEW: GNU ext.
5204 modify_ldt NEW: kernel
5208 nearbyint NEW: ISO C 9x
5209 nearbyintf NEW: ISO C 9x
5210 nearbyintl NEW: ISO C 9x
5211 netname2host NEW: Secure RPC
5212 netname2user NEW: Secure RPC
5213 nexttoward NEW: ISO C 9x
5214 nexttowardf NEW: ISO C 9x
5215 nexttowardl NEW: ISO C 9x
5219 passwd2des NEW: Secure RPC
5221 pow10f NEW: GNU ext.
5222 pow10l NEW: GNU ext.
5225 printf_size NEW: GNU ext.
5226 printf_size_info NEW: GNU ext.
5227 profil_counter REMOVED
5228 pthread_mutexattr_getkind_np REPLACED
5229 pthread_mutexattr_setkind_np REPLACED
5230 ptsname NEW: Unix98 PTY
5231 ptsname_r NEW: Unix98 PTY
5233 putchar_locked REMOVED
5234 putgrent NEW: GNU ext.
5236 putpmsg NEW: STREAMS
5237 pututxline NEW: Unix98
5241 readdir64_r NEW: LFS
5242 remquo NEW: ISO C 9x
5243 remquof NEW: ISO C 9x
5244 remquol NEW: ISO C 9x
5246 roundf NEW: ISO C 9x
5247 roundl NEW: ISO C 9x
5249 scalbln NEW: ISO C 9x
5250 scalblnf NEW: ISO C 9x
5251 scalblnl NEW: ISO C 9x
5253 sendfile NEW: kernel
5254 setcontext NEW: Unix98
5255 setrlimit64 NEW: LFS
5256 setutxent NEW: Unix98
5258 sigignore NEW: Unix98
5259 sigqueue NEW: POSIX.1b
5260 sigrelse NEW: Unix98
5261 sigset NEW: POSIX.1b
5262 sigtimedwait NEW: POSIX.1b
5263 sigwaitinfo NEW: POSIX.1b
5264 sincos NEW: GNU ext.
5265 sincosf NEW: GNU ext.
5266 sincosl NEW: GNU ext.
5270 strcasestr NEW: GNU ext.
5271 strtoimax NEW: ISO C 9x
5272 strtoumax NEW: ISO C 9x
5273 strverscmp NEW: GNU ext.
5274 svcauthdes_stats NEW: Secure RPC
5275 svcunix_create NEW: sunrpc etx
5276 svcunixfd_create NEW: sunrpc ext
5277 swapcontext NEW: Unix98
5278 tcgetsid NEW: Unix98 PTY
5279 tdestroy NEW: GNU ext.
5280 tgamma NEW: ISO C 9x
5281 tgammaf NEW: ISO C 9x
5282 tgammal NEW: ISO C 9x
5286 truncf NEW: ISO C 9x
5287 truncl NEW: ISO C 9x
5289 unlockpt NEW: Unix98 PTY
5290 updwtmpx NEW: Unix98
5291 user2netname NEW: Secure RPC
5292 utmpxname NEW: Unix98
5293 versionsort NEW: GNU ext.
5294 versionsort64 NEW: GNU ext.
5296 wcscasecmp NEW: GNU ext.
5297 wcsncasecmp NEW: GNU ext.
5298 wcsnlen NEW: GNU ext.
5299 wcstoimax NEW: ISO C 9x
5300 wcstoll NEW: ISO C 9x
5301 wcstoull NEW: ISO C 9x
5302 wcstoumax NEW: ISO C 9x
5304 wordexp NEW: POSIX.2
5305 wordfree NEW: POSIX.2
5306 write_profiling REMOVED
5307 xdecrypt NEW: Secure RPC
5308 xdr_authdes_cred NEW: Secure RPC
5309 xdr_authdes_verf NEW: Secure RPC
5310 xdr_cryptkeyarg NEW: Secure RPC
5311 xdr_cryptkeyarg2 NEW: Secure RPC
5312 xdr_cryptkeyres NEW: Secure RPC
5313 xdr_getcredres NEW: Secure RPC
5314 xdr_key_netstarg NEW: Secure RPC
5315 xdr_key_netstres NEW: Secure RPC
5316 xdr_keybuf NEW: Secure RPC
5317 xdr_keystatus NEW: Secure RPC
5318 xdr_netnamestr NEW: Secure RPC
5319 xdr_sizeof NEW: Secure RPC
5320 xdr_unixcred NEW: sunrpc ext
5321 xencrypt NEW: Secure RPC
5322 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5333 * inet_ntoa is thread-safe
5335 * updwtmp is moved from libutil to libc
5337 * rewrite of cbrt function
5339 * update of timezone data
5353 * add atoll function
5355 * fix complex problems in Berkeley DB code
5357 * fix math functions
5361 * fixed lots of header problems (especially Linux/GNU specific)
5363 * dynamic loader preserves all registers
5365 * Roland McGrath provided support for handling of auxiliary objects in
5366 the ELF dynamic loader.
5368 * support for parallel builds is improved
5372 * GNU extensions are no longer declared by default. To enable them you
5373 must define the macro `_GNU_SOURCE' in your program or compile with
5376 * The library has changed from using GNU ld symbol aliases to using weak
5377 symbols where available. The ELF object file format supports weak
5378 symbols; GNU ld also supports weak symbols in the a.out format. (There
5379 is also now support for other GNU ld extensions in ELF. Use the
5380 `--with-elf' option to configure to indicate you have ELF, and
5381 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5382 of many files which contained only symbol aliases, reducing the size of
5383 the source and the compiled library; many other files were renamed to
5384 less cryptic names previously occupied by the symbol alias files.
5385 There is a new header file <elf.h> for programs which operate on
5386 files in the ELF format.
5388 * Converted to Autoconf version 2, so `configure' has more options.
5389 Run `configure --help' to see the details.
5391 * The library can now be configured to build profiling, highly-optimized
5392 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5393 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5394 `configure' enable building these extra libraries. The shared library is
5395 built by default when using both ELF and GNU ld. When shared libraries
5396 are enabled, the new library `-ldl' is available for arbitrary run-time
5397 loading of shared objects; its interface is defined in <dlfcn.h>. The
5398 new header file <link.h> gives access to the internals of the run-time
5399 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5400 application of same name on other systems and it provides information
5401 about dynamically linked binaries.
5403 * The C library now provides the run-time support code for profiling
5404 executables compiled with `-pg'. Programs can control the profiling code
5405 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5406 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5407 the support for this file format was contributed by David Mosberger-Tang.
5409 * The math code has been replaced with a math library based on fdlibm from
5410 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5411 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5412 functions. The math functions now reside in a separate library, so
5413 programs using them will need to use `-lm' their linking commands.
5415 * John C. Bowman contributed optimized ix87 assembler inline functions.
5417 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5418 mechanism similar to that found in Solaris 2. This is now used for the
5419 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5420 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5421 file controls what services are used for each individual database. This
5422 works by loading shared libraries with names specified in `nsswitch.conf',
5423 so service modules can be changed or added at any time without even
5424 relinking any program. Currently there are the file, db, and NIS based
5425 NSS services available.
5427 * The new functions `strtoq' and `strtouq' parse integer values from
5428 strings, like `strtol' and `strtoul', but they return `long long int' and
5429 `unsigned long long int' values, respectively (64-bit quantities).
5431 * The new functions `strtof' and `strtold' parse floating-point values from
5432 strings, like `strtod', but they return `float' and `long double' values,
5433 respectively (on some machines `double' and `long double' are the same).
5435 * Ulrich Drepper has contributed new implementations of the floating-point
5436 printing and reading code used in the `printf' family of functions and
5437 `strtod', `strtof', and `strtold'. These new functions are perfectly
5438 accurate, and much faster than the old ones.
5440 * The implementation of the POSIX locale model was completely rewritten by
5441 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5442 to compile the POSIX locale definition.
5444 * The former dummy implementations of the strcoll and strxfrm function are
5445 now replaced by fully functional code contributed by Ulrich Drepper. The
5446 collation information comes from the POSIX locale definitions.
5448 * The new header <langinfo.h> defines an interface for accessing
5449 various locale-dependent data (using the locale chosen with `setlocale').
5451 * Ulrich Drepper has contributed a new suite of functions for operation on
5452 wide-character and multibyte-character strings, in <wchar.h>;
5453 and classification and case conversion of wide characters, in <wctype.h>.
5454 These new functions are conforming to the ISO C, Amendement 1 specification.
5456 * There is now a second implementation of the standard I/O library available.
5457 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5458 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5460 * You can now use positional parameter specifications in format strings
5461 for the `printf' and `scanf' families of functions. For example,
5462 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5463 ``Number 6, Mr Jones''. This is mainly useful when providing different
5464 format strings for different languages, whose grammars may dictate
5465 different orderings of the values being printed. To support this
5466 feature, the interface for `register_printf_handler' has changed; see
5467 the header file <printf.h> for details.
5469 * The `printf' and `scanf' families of functions now understand a new
5470 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5471 to group numbers as indicated by the locale; for `scanf' and friends, this
5472 says to accept as valid only a number with all the proper grouping
5473 separators in the right places. In the default "C" locale, numbers are
5474 not grouped; but locales for specific countries will define the usual
5475 conventions (i.e. separate thousands with `,' in the US locale).
5477 * The pgrp functions have been regularized, slightly incompatibly but much
5478 less confusingly. The core functions are now `getpgid' and `setpgid',
5479 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5480 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5481 provided for compatibility. There is no longer an incompatible `getpgrp'
5482 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5484 * The new header file <fts.h> and suite of functions simplify programs that
5485 operate on directory trees. This code comes from 4.4 BSD.
5487 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5488 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5489 NSS scheme used in glibc.
5491 * There is a new malloc debugging hook `__memalign_hook'.
5493 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5494 `unsigned int' in <sys/types.h>. These are for compatibility only and
5495 their use is discouraged.
5497 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5498 done differently, so that it works even without GNU ld.
5500 * New function `euidaccess' checks allowed access to a file like `access',
5501 but using the effective IDs instead of the real IDs.
5503 * The time zone data files have been updated for the latest and greatest
5504 local time conventions of the countries of the world.
5506 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5509 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5510 for formatting floating-point numbers. They are provided only for
5511 compatibility; new programs should use `sprintf' instead. There are
5512 also equivalent function for the `long double' floating-point type and
5513 all functions also exist in a reentrant form.
5515 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5516 functions for maintaining the login-record files (primarily of use to
5517 system programs such as `login'), and convenient functions for
5518 allocating and initializing a pseudo-terminal (pty) device.
5520 * Ulrich Drepper has contributed new support for System V style
5521 shared memory and IPC on systems that support it.
5523 * Ulrich Drepper has contributed several miscellaneous new functions found
5524 in System V: The `hsearch' family of functions provide an effective
5525 implementation of hash tables; `a64l' and `l64a' provide a very simple
5526 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5529 * Ulrich Drepper has contributed new reentrant counterparts for the
5530 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5532 * Ulrich Drepper has contributed new, highly-optimized versions of several
5533 string functions for the i486/Pentium family of processors.
5535 * Ulrich Drepper has updated the Linux-specific code, based largely
5536 on work done in Hongjiu Lu's version of GNU libc for Linux.
5537 The GNU library now supports Linux versions 2.0.10 and later,
5538 using the ELF object file format (i[3456]86-*-linux).
5540 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5542 * David Mosberger-Tang and Richard Henderson have ported the C library
5543 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5544 dynamic linking support for ELF/Alpha.
5546 * Richard Henderson contributed several Alpha optimized assembler function
5547 for arithmetic and string handling.
5549 * Ulrich Drepper has contributed a new set of message catalog functions to
5550 support multiple languages using the <libintl.h> interface, for use with
5551 his new package GNU gettext. Translation volunteers have contributed
5552 catalogs of the library's messages in Spanish, German, and Korean.
5554 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5555 program and the `catgets' function for reading the catalog files it
5556 creates. (The <libintl.h> interface is preferred; we include the
5557 <nl_types.h> interface using `catgets' only for source compatibility with
5558 programs already written to use it.)
5560 * New header file <values.h> gives SVID-compatible names for <limits.h>
5563 * Various new macros, declarations, and small header files for compatibility
5566 * New function `group_member' is a convenient way to check if a process has
5567 a given effective group ID.
5569 * When using GCC 2.7 and later, the socket functions are now declared in a
5570 special way so that passing an argument of type `struct sockaddr_in *',
5571 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5572 `struct sockaddr *' type, does not generate a type-clash warning.
5574 * New function `error' declared in header file <error.h> is a convenient
5575 function for printing error messages and optionally exiting; this is the
5576 canonical function used in GNU programs. The new functions `err', `warn',
5577 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5578 doing the same thing.
5580 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5581 POSIX.2 `glob' function to do ~ and {...} expansion.
5583 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5584 `clearenv' which is used in POSIX.9 is also available.
5586 * New function `getsid' returns session ID number on systems that support it.
5588 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5589 files <db.h> and <mpool.h> provide a rich set of functions for several
5590 types of simple databases stored in memory and in files, and <ndbm.h> is
5591 an old `ndbm'-compatible interface using the `db' functions. Link with
5592 `-ldb' to get these functions.
5594 * New macro `strdupa' copies a string like `strdup', but uses local stack
5595 space from `alloca' instead of dynamic heap space from `malloc'.
5597 * New function `strnlen' is like `strlen' but searches only a given maximum
5598 number of characters for the null terminator. `stpncpy', `strndup' and
5599 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5602 * New function `statfs' in header <sys/statfs.h>.
5604 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5605 provide convenient functions for operating on blocks of null-terminated
5608 * A new suite of functions in <utmp.h> handle all the details of reading
5609 and writing the utmp file.
5611 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5614 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5615 completely POSIX compliant and also implemented the extended functionality
5616 to handle alternate digit representation and alternate era date formats.
5618 * Ulrich Drepper provided an implementation of the `strptime' function
5619 defined in XPG4.2 which transforms a string into a `struct tm' value.
5621 * Paul Eggert provided the tzselect shell script as part of the timezone
5622 code. The shell script makes it easy to select the correct timezone
5625 * The implementation of the malloc family of functions is completely replaced
5626 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5627 The implementation uses the mmap function (if available) and it is
5628 optimized for the use in multi threaded programs.
5630 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5631 functions. This new functionality is usable by specifying a special
5632 salt string and it is compatible with implementation on *BSD systems.
5634 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5635 `getsubopt' to handle second level command line options, `bsd_signal'
5636 to access BSD style `signal' functionality, the obsolete `regexp' style
5639 * the `lchown' function is available on system which support this
5642 * The implementation of the shadow password handling function was contributed
5645 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5647 * POSIX.1g support was added. The <sys/select.h> header is available,
5648 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5649 implementation of `getaddrinfo'.
5653 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5655 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5656 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5658 * The new function `daemon' from 4.4 BSD is useful for server programs that
5659 want to put themselves in the background.
5661 * Joel Sherrill has contributed support for several standalone boards that
5662 run without an operating system.
5664 * `printf', `scanf' and friends now accept a `q' type modifier for long
5665 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5667 * All of the code taken from BSD (notably most of the math and networking
5668 routines) has been updated from the BSD 4.4-Lite release.
5670 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5672 * The new functions `getdomainname' and `setdomainname' fetch or change the
5673 YP/NIS domain name. These are system calls which exist on systems which
5676 * The time zone data files have been updated for the latest international
5679 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5680 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5684 * The C library now includes support for Sun RPC, from Sun's free
5685 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5686 are included. (There is still no support for YP.)
5688 * Tom Quinn has contributed a port of the C library to SGI machines running
5689 Irix 4 (mips-sgi-irix4).
5691 * The new `lockf' function is a simplified interface to the locking
5692 facilities of `fcntl', included for compatibility.
5694 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5696 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5698 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5701 * The error message printed by `assert' for a failed assertion now includes
5702 the name of the program (if using GNU ld) and the name of the calling
5703 function (with versions of GCC that support this).
5705 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5707 * The library now includes the <sys/mman.h> header file and memory
5708 management functions `mmap', `munmap', `mprotect', `msync', and
5709 `madvise', on systems that support those facilities.
5711 * The interface for `mcheck' has changed slightly: the function called to
5712 abort the program when an allocation inconsistency is detected now takes
5713 an argument that indicates the type of failure. The new function
5714 `mprobe' lets you request a consistency check for a particular block at
5715 any time (checks are normally done only when you call `free' or `realloc'
5718 * It is now possible to easily cross-compile the C library, building on one
5719 system a library to run on another machine and/or operating system. All
5720 you need to do is set the variable `HOST_CC' in `configparms' to the
5721 native compiler for programs to run on the machine you are building on (a
5722 few generator programs are used on Unix systems); set `CC' to the
5725 * The new function `fexecve' (only implemented on the GNU system) executes
5726 a program file given a file descriptor already open on the file.
5730 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5731 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5733 * You can set the variable `libprefix' in `configparms' to specify a prefix
5734 to be prepended to installed library files; this makes it easy to install
5735 the GNU C library to be linked as `-lgnuc' or whatever.
5737 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5738 copies a limited number of characters from a string, and returns the
5739 address of the last character written.
5741 * You no longer need to check for whether the installed `stddef.h' is
5742 compatible with the GNU C library. configure now checks for you.
5744 * You can now define a per-stream `fileno' function to convert the
5745 stream's cookie into an integral file descriptor.
5747 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5748 allocates zero bytes of storage, and returns a unique pointer which
5749 you can pass to `realloc' or `free'. The behavior is undefined if
5750 you dereference this pointer.
5752 * The C library now runs on Sony NEWS m68k machines running either
5753 NewsOS 3 or NewsOS 4.
5755 * The new `syscall' function is a system-dependent primitive function
5756 for invoking system calls. It has the canonical behavior on Unix
5757 systems, including unreliable return values for some calls (such as
5758 `pipe', `fork' and `getppid').
5760 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5761 to `EAGAIN', which is the preferred name. On systems whose kernels
5762 use two distinct codes, the C library now translates EWOULDBLOCK to
5763 EAGAIN in every system call function.
5767 * The GNU C Library Reference Manual is now distributed with the library.
5768 `make dvi' will produce a DVI file of the printed manual.
5769 `make info' will produce Info files that you can read on line using C-h i
5770 in Emacs or the `info' program.
5771 Please send comments on the manual to bug-glibc-manual@gnu.org.
5773 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5775 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5777 * Jason Merrill has contributed a port to the Sequent Symmetry running
5778 Dynix version 3 (i386-sequent-dynix).
5780 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5781 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5783 * New function `memory_warnings' lets you arrange to get warnings when
5784 malloc is running out of memory to allocate, like Emacs gives you.
5786 * The C library now contains the relocating allocator used in Emacs 19 for
5787 its editing buffers. This allocator (ralloc) minimizes allocation
5788 overhead and fragmentation by moving allocated regions around whenever it
5789 needs to. You always refer to a ralloc'd region with a "handle" (a
5790 pointer to a pointer--an object of type `void **').
5792 * There is a new `printf' format: `%m' gives you the string corresponding
5793 to the error code in `errno'.
5795 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5796 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5797 pass, the `a' modifier says to fill in a `char **' you pass with a
5800 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5801 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5802 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5804 * `mkstemp' is a traditional Unix function to atomically create and open a
5805 uniquely-named temporary file.
5809 * The standard location for the file that says what the local timezone is
5810 has changed again. It is now `/usr/local/etc/localtime' (or more
5811 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5813 * The distribution no longer contains any files with names longer than 14
5816 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5817 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5819 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5823 * The configuration process has changed quite a bit. The `configure'
5824 script is now used just like the configuration scripts for other GNU
5825 packages. The `sysdeps' directory hierarchy is much rearranged.
5826 The file `INSTALL' explains the new scheme in detail.
5828 * The header files no longer need to be processed into ANSI C and
5829 traditional C versions. There is just one set of files to install, and
5830 it will work with ANSI or old C compilers (including `gcc -traditional').
5832 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5833 MIPS DECStation running Ultrix 4.
5835 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5836 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5837 made itself into a shared library.
5839 * Yet further improved support for the i386, running 4.3 BSD-like systems
5840 (such as Mach 3 with the Unix single-server), or System V.
5842 * New function `strncasecmp' to do case-insensitive string comparison
5843 with limited length.
5845 * New function `strsep' is a reentrant alternative to `strtok'.
5847 * New functions `scandir' and `alphasort' for searching directories.
5849 * New function `setenv' is a better interface to `putenv'.
5851 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5852 function for traversing a directory tree.
5854 * The GNU obstack package is now also part of the C library.
5855 The new function `open_obstack_stream' creates a stdio stream that
5856 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5857 formatted output directly to an obstack.
5859 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5860 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5862 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5864 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5865 things to your strings.
5867 * There are some new test programs: test-fseek, testmb, and testrand.
5869 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5870 These ports are not finished, but are a good starting place for really
5871 supporting those systems.
5873 * `/etc/localtime' is now the standard location for the file that says what
5874 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5875 This follows the general principle that `/etc' is the place for all local
5876 configuration files.
5878 * The C library header files now use `extern "C"' when used by the C++
5879 compiler, so the C library should now work with C++ code.
5881 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5882 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5885 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5886 function which uses the `merge sort' algorithm, and is said to be
5887 significantly faster than the old GNU `qsort' function. Merge sort is
5888 now the standard `qsort' function. The new algorithm can require a lot
5889 of temporary storage; so, the old sorting function is called when the
5890 required storage is not available.
5892 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5893 provides the Unix `crypt' function, plus some other entry points.
5895 * The code and header files taken from 4.4 BSD have been updated with the
5896 latest files released from Berkeley.
5898 ----------------------------------------------------------------------
5899 Copyright information:
5901 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5903 Permission is granted to anyone to make or distribute verbatim copies
5904 of this document as received, in any medium, provided that the
5905 copyright notice and this permission notice are preserved,
5906 thus giving the recipient permission to redistribute in turn.
5908 Permission is granted to distribute modified versions
5909 of this document, or of portions of it,
5910 under the above conditions, provided also that they
5911 carry prominent notices stating who last changed them.
5914 version-control: never