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 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
14 Deprecated and removed features, and other changes affecting compatibility:
16 [Add deprecations, removals and changes affecting compatibility here]
18 Changes to build and runtime requirements:
20 [Add changes to build and runtime requirements here]
22 Security related changes:
24 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
25 corruption when they were passed a pseudo-zero argument. Reported by Guido
26 Vranken / ForAllSecure Mayhem.
28 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
29 out-of-bounds write when executed in a signal frame context.
31 CVE-2020-1752: A use-after-free vulnerability in the glob function when
32 expanding ~user has been fixed.
34 The following bugs are resolved with this release:
36 [The release manager will add the list generated by
37 scripts/list-fixed-bugs.py just before the release.]
43 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
44 enable features from the draft ISO C2X standard. Only some features from
45 this draft standard are supported by the GNU C Library, and as the draft
46 is under active development, the set of features enabled by this macro is
47 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
48 by compiling with "gcc -std=gnu2x".
50 * The <math.h> functions that round their results to a narrower type now
51 have corresponding type-generic macros in <tgmath.h>, as defined in TS
52 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
53 Clarification Request 13 to TS 18661-3.
55 * The function pthread_clockjoin_np has been added, enabling join with a
56 terminated thread with a specific clock. It allows waiting against
57 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
59 * New locale added: mnw_MM (Mon language spoken in Myanmar).
61 * The DNS stub resolver will optionally send the AD (authenticated data) bit
62 in queries if the trust-ad option is set via the options directive in
63 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
64 mode, the AD bit, as provided by the name server, is available to
65 applications which call res_search and related functions. In the default
66 mode, the AD bit is not set in queries, and it is automatically cleared in
67 responses, indicating a lack of DNSSEC validation. (Therefore, the name
68 servers and the network path to them are treated as untrusted.)
70 Deprecated and removed features, and other changes affecting compatibility:
72 * The totalorder and totalordermag functions, and the corresponding
73 functions for other floating-point types, now take pointer arguments to
74 avoid signaling NaNs possibly being converted to quiet NaNs in argument
75 passing. This is in accordance with the resolution of Clarification
76 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
77 floating-point arguments directly will continue to work.
79 * The obsolete function stime is no longer available to newly linked
80 binaries, and its declaration has been removed from <time.h>.
81 Programs that set the system time should use clock_settime instead.
83 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
84 in a future version of glibc. In this release, the header still exists
85 but calling ftime will cause a compiler warning. All programs should use
86 gettimeofday or clock_gettime instead.
88 * The gettimeofday function no longer reports information about a
89 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
90 many years, as it cannot handle the full complexity of the world's
91 timezones, but hitherto we have supported it on a best-effort basis.
92 Changes required to support 64-bit time_t on 32-bit architectures have
93 made this no longer practical.
95 As of this release, callers of gettimeofday with a non-null 'tzp' argument
96 should expect to receive a 'struct timezone' whose tz_minuteswest and
97 tz_dsttime fields are zero. (For efficiency reasons, this does not always
98 happen on a few Linux-based ports. This will be corrected in a future
101 All callers should supply a null pointer for the 'tzp' argument to
102 gettimeofday. For accurate information about the time zone associated
103 with the current time, use the localtime function.
105 gettimeofday itself is obsolescent according to POSIX. We have no plans
106 to remove access to this function, but portable programs should consider
107 using clock_gettime instead.
109 * The settimeofday function can still be used to set a system-wide time
110 zone when the operating system supports it. This is because the Linux
111 kernel reused the API, on some architectures, to describe a system-wide
112 time-zone-like offset between the software clock maintained by the kernel,
113 and the "RTC" clock that keeps time when the system is shut down.
115 However, to reduce the odds of this offset being set by accident,
116 settimeofday can no longer be used to set the time and the offset
117 simultaneously. If both of its two arguments are non-null, the call
118 will fail (setting errno to EINVAL).
120 Callers attempting to set this offset should also be prepared for the call
121 to fail and set errno to ENOSYS; this already happens on the Hurd and on
122 some Linux architectures. The Linux kernel maintainers are discussing a
123 more principled replacement for the reused API. After a replacement
124 becomes available, we will change settimeofday to fail with ENOSYS on all
125 platforms when its 'tzp' argument is not a null pointer.
127 settimeofday itself is obsolescent according to POSIX. Programs that set
128 the system time should use clock_settime and/or the adjtime family of
129 functions instead. We may cease to make settimeofday available to newly
130 linked binaries after there is a replacement for Linux's time-zone-like
133 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
134 the optional CAS instruction is implemented (for instance, LEON processors
135 are still supported, but SuperSPARC processors are not).
137 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
140 * If a lazy binding failure happens during dlopen, during the execution of
141 an ELF constructor, the process is now terminated. Previously, the
142 dynamic loader would return NULL from dlopen, with the lazy binding error
143 captured in a dlerror message. In general, this is unsafe because
144 resetting the stack in an arbitrary function call is not possible.
146 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
147 executable stack unless explicitly configured at build time to require
148 minimum kernel version 4.8 or newer. This is because executing
149 floating-point branches on a non-executable stack on Linux kernels prior to
150 4.8 can lead to application crashes for some MIPS configurations. While
151 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
152 expected to enable non-executable stack by default with PT_GNU_STACK by
153 default and is thus likely to trigger a crash on older kernels.
155 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
156 non-executable stack while dropping support for older kernels.
158 * System call wrappers for time system calls now use the new time64 system
159 calls when available. On 32-bit targets, these wrappers attempt to call
160 the new system calls first and fall back to the older 32-bit time system
161 calls if they are not present. This may cause issues in environments
162 that cannot handle unsupported system calls gracefully by returning
163 -ENOSYS. Seccomp sandboxes are affected by this issue.
165 Changes to build and runtime requirements:
167 * It is no longer necessary to have recent Linux kernel headers to build
168 working (non-stub) system call wrappers on all architectures except 64-bit
169 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
171 * The ChangeLog file is no longer present in the toplevel directory of the
172 source tree. ChangeLog files are located in the ChangeLog.old directory as
173 ChangeLog.N where the highest N has the latest entries.
175 Security related changes:
177 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
178 environment variable during program execution after a security
179 transition, allowing local attackers to restrict the possible mapping
180 addresses for loaded libraries and thus bypass ASLR for a setuid
181 program. Reported by Marcin KoĆcielnicki.
183 The following bugs are resolved with this release:
185 [12031] localedata: iconv -t ascii//translit with Greek characters
186 [15813] libc: Multiple issues in __gen_tempname
187 [17726] libc: [arm, sparc] profil_counter should be compat symbol
188 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
189 [19767] libc: vdso is not used with static linking
190 [19903] hurd: Shared mappings not being inherited by children processes
191 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
192 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
194 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
195 Symbols-A/B Unicode blocks
196 [23518] libc: Eliminate __libc_utmp_jump_table
197 [24026] malloc: malloc_info() returns wrong numbers
198 [24054] localedata: Many locales are missing date_fmt
199 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
200 [24304] dynamic-link: Lazy binding failure during ELF
201 constructors/destructors is not fatal
202 [24376] libc: RISC-V symbol size confusion with _start
203 [24682] localedata: zh_CN first weekday should be Monday per GB/T
205 [24824] libc: test-in-container does not install charmap files compatible
207 [24844] regex: regex bad pointer / leakage if malloc fails
208 [24867] malloc: Unintended malloc_info formatting changes
209 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
210 [24880] libc: login: utmp implementation uses struct flock with fcntl64
211 [24882] libc: login: pututline uses potentially outdated cache
212 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
213 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
215 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
217 [24930] dynamic-link: dlopen of PIE executable can result in
218 _dl_allocate_tls_init assertion failure
219 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
220 (stringop-overflow error)
221 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
222 functions other can lead to crashes
223 [24967] libc: jemalloc static linking causes runtime failure
224 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
226 [25035] libc: sbrk() failure handled poorly in tunables_strdup
227 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
228 [25097] libc: new -Warray-bounds with GCC 10
229 [25112] dynamic-link: dlopen must not make new objects accessible when it
230 still can fail with an error
231 [25139] localedata: Please add the new mnw_MM locale
232 [25149] regex: Array bounds violation in proceed_next_node
233 [25157] dynamic-link: Audit cookie for the dynamic loader is not
234 initialized correctly
235 [25189] libc: glibc's __glibc_has_include causes issues with clang
237 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
239 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
240 binaries (CVE-2019-19126)
241 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
243 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
245 [25232] string: <string.h> does not enable const correctness for strchr et
247 [25233] localedata: Consider "." as the thousands separator for sl_SI
249 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
250 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
251 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
253 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
254 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
256 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
257 (dl_initfirst) link map pointer
258 [25401] malloc: pvalloc must not have __attribute_alloc_size__
259 [25423] libc: Array overflow in backtrace on powerpc
260 [25425] network: Missing call to __resolv_context_put in
261 getaddrinfo.c:gethosts
268 * Unicode 12.1.0 Support: Character encoding, character type info, and
269 transliteration tables are all updated to Unicode 12.1.0, using
270 generator scripts contributed by Mike FABIAN (Red Hat).
272 * The dynamic linker accepts the --preload argument to preload shared
273 objects, in addition to the LD_PRELOAD environment variable.
275 * The twalk_r function has been added. It is similar to the existing
276 twalk function, but it passes an additional caller-supplied argument
277 to the callback function.
279 * On Linux, the getdents64, gettid, and tgkill functions have been added.
281 * Minguo (Republic of China) calendar support has been added as an
282 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
285 * The entry for the new Japanese era has been added for ja_JP locale.
287 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
288 pvalloc, memalign, and posix_memalign fail now with total object size
289 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
290 pointer subtraction within the allocated object, where results might
291 overflow the ptrdiff_t type.
293 * The dynamic linker no longer refuses to load objects which reference
294 versioned symbols whose implementation has moved to a different soname
295 since the object has been linked. The old error message, symbol
296 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
297 link time reference, is gone.
299 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
300 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
301 functions. These behave similarly to their "timed" equivalents, but also
302 accept a clockid_t parameter to determine which clock their timeout should
303 be measured against. All functions allow waiting against CLOCK_MONOTONIC
304 and CLOCK_REALTIME. The decision of which clock to be used is made at the
305 time of the wait (unlike with pthread_condattr_setclock, which requires
306 the clock choice at initialization time).
308 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
309 work, new resolvers can use a second argument which can be extended in
310 the future, currently it contains the AT_HWCAP2 value.
312 Deprecated and removed features, and other changes affecting compatibility:
314 * The copy_file_range function fails with ENOSYS if the kernel does not
315 support the system call of the same name. Previously, user space
316 emulation was performed, but its behavior did not match the kernel
317 behavior, which was deemed too confusing. Applications which use the
318 copy_file_range function can no longer rely on glibc to provide a fallback
319 on kernels that do not support the copy_file_range system call, and if
320 this function returns ENOSYS, they will need to use their own fallback.
321 Support for copy_file_range for most architectures was added in version
322 4.5 of the mainline Linux kernel.
324 * The functions clock_gettime, clock_getres, clock_settime,
325 clock_getcpuclockid, clock_nanosleep were removed from the librt library
326 for new applications (on architectures which had them). Instead, the
327 definitions in libc will be used automatically, which have been available
330 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
331 and <sys/stropts.h> have been removed.
333 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
334 resolver flag (deprecated in glibc 2.25) have been removed.
336 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
337 resolver have been removed from <resolv.h>.
339 * With --enable-bind-now, installed programs are now linked with the
342 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
343 configurations) has been removed, following the deprecation of this
344 subarchitecture in version 8 of GCC, and its removal in version 9.
346 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
347 header have been removed.
349 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
350 deprecated and will be removed from a future version of glibc.
351 Application should directly access /proc instead. For obtaining random
352 bits, the getentropy function can be used.
354 Changes to build and runtime requirements:
356 * GCC 6.2 or later is required to build the GNU C Library.
358 Older GCC versions and non-GNU compilers are still supported when
359 compiling programs that use the GNU C Library.
361 Security related changes:
363 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
364 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
365 has undefined behavior. On x32, the size_t argument may be passed
366 in the lower 32 bits of the 64-bit RDX register with non-zero upper
367 32 bits. When it happened with the sign bit of RDX register set,
368 memcmp gave the wrong result since it treated the size argument as
369 zero. Reported by H.J. Lu.
371 CVE-2019-9169: Attempted case-insensitive regular-expression match
372 via proceed_next_node in posix/regexec.c leads to heap-based buffer
373 over-read. Reported by Hongxu Chen.
375 The following bugs are resolved with this release:
377 [2872] locale: Transliteration Cyrillic -> ASCII fails
378 [6399] libc: gettid() should have a wrapper
379 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
380 [16976] glob: fnmatch unbounded stack VLA for collating symbols
381 [17396] localedata: globbing for locale by [[.collating-element.]]
382 [18035] dynamic-link: pldd does no longer work, enters infinite loop
383 [18465] malloc: memusagestat is built using system C library
384 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
385 invalid input drops valid char
386 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
387 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
388 [21897] localedata: Afar locales: Fix mon, abmon, and abday
389 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
390 [23352] malloc: __malloc_check_init still defined in public header
392 [23403] nptl: Wrong alignment of TLS variables
393 [23501] libc: nftw() doesn't return dangling symlink's inode
394 [23733] malloc: Check the count before calling tcache_get()
395 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
397 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
398 [23844] nptl: pthread_rwlock_trywrlock results in hang
399 [23983] argparse: Missing compat versions of argp_failure and argp_error
400 for long double = double
401 [23984] libc: Missing compat versions of err.h and error.h functions for
403 [23996] localedata: Dutch salutations
404 [24040] libc: riscv64: unterminated call chain in __thread_start
405 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
407 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
408 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
410 [24114] regex: regexec buffer read overrun in "grep -i
411 '\(\(\)*.\)*\(\)\(\)\1'"
412 [24122] libc: Segfaults if 0 returned from la_version
413 [24153] stdio: Some input functions do not react to stdin assignment
414 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
415 RDX is set) (CVE-2019-7309)
416 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
417 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
418 not the default "nor"
419 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
420 false positives, change to modern flexible array
421 [24180] nptl: pthread_mutex_trylock does not use the correct order of
422 instructions while maintaining the robust mutex list due to missing
424 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
425 unnecessary librt dependencies
426 [24200] localedata: Revert first_weekday removal in en_IE locale
427 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
428 [24215] nptl: pthread_timedjoin_np should be a cancellation point
429 [24216] malloc: Check for large bin list corruption when inserting
431 [24228] stdio: old x86 applications that use legacy libio crash on exit
432 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
434 [24293] localedata: Missing Minguo calendar support for TW locales
435 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
437 [24307] localedata: Update locale data to Unicode 12.0.0
438 [24323] dynamic-link: dlopen should not be able open PIE objects
439 [24335] build: "Obsolete types detected" with Linux 5.0 headers
440 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
442 [24370] localedata: Add lang_name for tt_RU locale
443 [24372] locale: Binary locale files are not architecture independent
444 [24394] time: strptime %Ey mis-parses final year of era
445 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
447 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
449 [24531] malloc: Malloc tunables give tcache assertion failures
450 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
452 [24535] localedata: Update locale data to Unicode 12.1.0
453 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
454 kernels and break testing
455 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
456 [24556] build: [GCC 9] error: â%sâ directive argument is null
457 [-Werror=format-overflow=]
458 [24570] libc: alpha: compat msgctl uses __IPC_64
459 [24584] locale: Data race in __wcsmbs_clone_conv
460 [24588] stdio: Remove codecvt vtables from libio
461 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
463 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
464 [24632] stdio: Old binaries which use freopen with default stdio handles
466 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
468 [24652] localedata: szl_PL spelling correction
469 [24695] nss: nss_db: calling getpwent after endpwent crashes
470 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
471 in /etc/nsswitch.conf
472 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
473 [24740] libc: getdents64 type confusion
474 [24741] dynamic-link: ld.so should not require that a versioned symbol is
475 always implemented in the same library
476 [24744] libc: Remove copy_file_range emulation
477 [24757] malloc: memusagestat is linked against system libpthread
478 [24794] libc: Partial test suite run builds corrupt test-in-container
486 * The getcpu wrapper function has been added, which returns the currently
487 used CPU and NUMA node. This function is Linux-specific.
489 * A new convenience target has been added for distribution maintainers
490 to build and install all locales as directories with files. The new
491 target is run by issuing the following command in your build tree:
492 'make localedata/install-locale-files', with an optional DESTDIR
493 to set the install root if you wish to install into a non-default
496 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
498 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
499 for _GNU_SOURCE, to match BSD environments.
501 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
502 indicates that it will abort the transaction prior to entering the kernel
503 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
504 suspended, and this caused some undefined side-effects issues by aborting
505 transactions manually. Glibc avoided it by abort transactions manually on
506 each syscall, but it lead to performance issues on newer kernels where the
507 HTM state is saved and restore lazily (the state being saved even when the
508 process actually does not use HTM).
510 * The functions posix_spawn_file_actions_addchdir_np and
511 posix_spawn_file_actions_addfchdir_np have been added, enabling
512 posix_spawn and posix_spawnp to run the new process in a different
513 directory. These functions are GNU extensions. The function
514 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
517 * The popen and system do not run atfork handlers anymore (BZ#17490).
518 Although it is a possible POSIX violation, the POSIX rationale in
519 pthread_atfork documentation regarding atfork handlers is to handle
520 inconsistent mutex state after a fork call in a multi-threaded process.
521 In both popen and system there is no direct access to user-defined mutexes.
523 * Support for the C-SKY ABIV2 running on Linux has been added. This port
524 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
526 - C-SKY ABIV2 soft-float little-endian
527 - C-SKY ABIV2 hard-float little-endian
529 * strftime's default formatting of a locale's alternative year (%Ey)
530 has been changed to zero-pad the year to a minimum of two digits,
531 like "%y". This improves the display of Japanese era years during
532 the first nine years of a new era, and is expected to be harmless
533 for all other locales (only Japanese locales regularly have
534 alternative year numbers less than 10). Zero-padding can be
535 overridden with the '_' or '-' flags (which are GNU extensions).
537 * As a GNU extension, the '_' and '-' flags can now be applied to
538 "%EY" to control how the year number is formatted; they have the
539 same effect that they would on "%Ey".
541 Deprecated and removed features, and other changes affecting compatibility:
543 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
544 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
546 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
547 in <sys/procfs.h>, has been corrected to match the type actually used by
548 the Linux kernel. This affects the size and layout of that structure on
549 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
551 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
552 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
553 defined in <sys/procfs.h>, has been corrected to match the type actually
554 used by the Linux kernel. This affects the size and layout of those
557 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
558 meant to scan a string and allocate space for it with malloc, is now
559 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
560 defined. This extension conflicts with C99's use of '%a' to scan a
561 hexadecimal floating-point number, which is now available to programs
562 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
564 POSIX.1-2008 includes the feature of allocating a buffer for string input
565 with malloc, using the modifier letter 'm' instead. Programs using
566 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
567 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
568 C99 '%a' no longer need to avoid _GNU_SOURCE.
570 GCC's -Wformat warnings can detect most uses of this extension, as long
571 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
572 __attribute__ ((format (scanf, ...))).
574 Changes to build and runtime requirements:
576 * Python 3.4 or later is required to build the GNU C Library.
578 * On most architectures, GCC 5 or later is required to build the GNU C
579 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
581 Older GCC versions and non-GNU compilers are still supported when
582 compiling programs that use the GNU C Library.
584 Security related changes:
586 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
587 denial of service due to resource exhaustion when processing getaddrinfo
588 calls with crafted host names. Reported by Guido Vranken.
590 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
591 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
592 happened, accessing the 32-bit size_t value as the full 64-bit register
593 in the assembly string/memory functions would cause a buffer overflow.
596 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
597 addresses with arbitrary trailing characters, potentially leading to data
598 or command injection issues in applications.
600 The following bugs are resolved with this release:
602 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
603 [10496] localedata: 12h time representation in multiple locales faulty
604 [10797] localedata: it_IT locale numeric does not have a separator for
606 [11319] libc: dprintf doesn't handle errors properly
607 [16346] time: mktime: potentially unsafe use of localtime_offset
608 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
610 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
611 posix_spawn_file_actions_addfchdir_np
612 [17426] localedata: Indian locales: set the correct date format
613 [17490] stdio: popen should not invoke atfork handlers
614 [17783] libc: TIOCSER_TEMT conditions inconsistent
615 [18040] regex: use-after-free in regexec/get_subexp
616 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
617 [20018] network: getaddrinfo should reject IP addresses with trailing
618 characters (CVE-2016-10739)
619 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
620 [20271] libc: Missing "\n" in __libc_fatal calls
621 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
622 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
623 pointer argument is non-NULL
624 [21037] stdio: open_memstream and freopen
625 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
626 [21716] time: Crash in glibc's mktime in low-memory situations
627 [22834] stdio: Subprocess forked by popen may crash in Linux when
628 multithreads call popen
629 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
630 and pthread_create fails.
631 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
632 [23125] libc: riscv64: endless loop when throwing an exception from a
634 [23275] nptl: Race in pthread_mutex_lock while promoting to
635 PTHREAD_MUTEX_ELISION_NP.
636 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
638 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
640 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
642 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
643 [23509] dynamic-link: CET enabled glibc is incompatible with the older
645 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
646 [23521] nss: get_next_alias nss_files file stream leak
647 [23538] nptl: Hang in pthread_cond_broadcast
648 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
649 [23578] regex: Invalid memory access if regex pattern contains NUL byte
650 [23579] libc: Errors misreported in preadv2
651 [23597] build: support/test-container.c doesn't work with different
653 [23603] time: mktime signed integer overflow on large timestamps
654 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
655 [23614] libc: powerpc: missing CFI register information in __mpn_*
657 [23637] string: Generic strstr/strcasestr fails with huge needles
658 [23640] libc: no way to easily clear FD_CLOEXEC in
659 posix_spawn_file_actions_adddup2()
660 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
662 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
664 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
665 [23689] libc: Bug in documentation for rusage.ru_ixrss in
666 bits/types/struct_rusage.h
667 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
669 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
671 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
672 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
673 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
675 [23724] localedata: Albanian date formats are incorrect
676 [23735] math: libnldbl_nonshared.a references internal libm symbols
677 [23740] localedata: kl_GL: Month names and date formats need update
678 [23744] regex: regex refactorings to remove BE, avoid duplication
679 [23745] time: mktime fix for Gnulib + coreutils
680 [23758] time: Improve the width of alternate representation for year in
682 [23783] libc: [mips] Missing CMSPAR bits/termios.h
683 [23789] time: mktime does not set errno on failure
684 [23791] localedata: Wrong monetary format for ca_ES locale
685 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
686 [23794] locale: c16rtomb does not handle surrogate pairs
687 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
688 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
689 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
690 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
691 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
692 [23862] libc: [sh] missing kernel-features.h undefines
693 [23864] libc: [riscv] missing kernel-features.h undefines
694 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
695 [23907] malloc: Incorrect double-free malloc tcache check disregards
697 [23913] libc: off-by-one in function maybe_script_execute in
698 sysdeps/posix/spawni.c
699 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
700 [23923] locale: Add --no-hard-links option to localedef
701 [23927] network: Linux if_nametoindex() does not close descriptor
703 [23961] math: powf can overflow to inf without setting errno in non-
704 nearest rounding mode
705 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
706 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
707 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
708 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
709 [24011] localedata: Fixed small type in comment for locale bs_BA
710 [24018] libc: gettext() may return NULL
711 [24022] build: riscv build failure with Linux kernel 4.20-rc7
712 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
713 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
715 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
716 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
718 [24046] localedata: en_US locale doesn't define date_fmt
719 [24063] manual: @var{errno} should be @code{errno}
720 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
721 [24088] libc: VSCR field is not being correctly read in ucontext_t on
723 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
725 [24097] string: Can't use 64-bit register for size_t in assembly codes for
727 [24110] hurd: SS_DISABLE never set in stack_t value returned by
729 [24112] network: Do not send DNS queries for non-host names (where all
730 answers will be rejected)
731 [24130] libc: alpha __remqu corrupts $f3 register
738 * The localization data for ISO 14651 is updated to match the 2016
739 Edition 4 release of the standard, this matches data provided by
740 Unicode 9.0.0. This update introduces significant improvements to the
741 collation of Unicode characters. This release deviates slightly from
742 the standard in that the collation element ordering for lowercase and
743 uppercase LATIN script characters is adjusted to ensure that regular
744 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
745 is not matched by [a-z]. With the update many locales have been
746 updated to take advantage of the new collation information. The new
747 collation information has increased the size of the compiled locale
748 archive or binary locales.
750 * The GNU C Library can now be compiled with support for Intel CET, AKA
751 Intel Control-flow Enforcement Technology. When the library is built
752 with --enable-cet, the resulting glibc is protected with indirect
753 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
754 compatible with all existing executables and shared libraries. This
755 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
756 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
757 capable of multi-byte NOPs, like x86-64 processors as well as Intel
758 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
759 x86_64 and x32 on non-CET processors. --enable-cet has been tested
760 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
763 * The GNU C Library now has correct support for ABSOLUTE symbols
764 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
765 relocated incorrectly or in some cases discarded. The GNU linker can
766 make use of the newer semantics, but it must communicate it to the
767 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
768 field) to indicate such support is required.
770 * Unicode 11.0.0 Support: Character encoding, character type info, and
771 transliteration tables are all updated to Unicode 11.0.0, using
772 generator scripts contributed by Mike FABIAN (Red Hat).
774 * <math.h> functions that round their results to a narrower type are added
775 from TS 18661-1:2014 and TS 18661-3:2015:
777 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
780 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
783 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
786 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
789 * Two grammatical forms of month names are now supported for the following
790 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
791 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
792 support two grammatical forms in abbreviated month names: Catalan, Greek,
795 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
796 include the support for two grammatical forms of month names.
798 * Building and running on GNU/Hurd systems now works without out-of-tree
801 * The renameat2 function has been added, a variant of the renameat function
802 which has a flags argument. If the flags are zero, the renameat2 function
803 acts like renameat. If the flag is not zero and there is no kernel
804 support for renameat2, the function will fail with an errno value of
805 EINVAL. This is different from the existing gnulib function renameatu,
806 which performs a plain rename operation in case of a RENAME_NOREPLACE
807 flags and a non-existing destination (and therefore has a race condition
808 that can clobber the destination inadvertently).
810 * The statx function has been added, a variant of the fstatat64
811 function with an additional flags argument. If there is no direct
812 kernel support for statx, glibc provides basic stat support based on
813 the fstatat64 function.
815 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
816 library if installed. libidn2 version 2.0.5 or later is recommended. If
817 libidn2 is not available, internationalized domain names are not encoded
818 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
819 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
820 with an encoding error.) Flags which used to change the IDN encoding and
821 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
822 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
823 deprecated. They no longer have any effect.
825 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
826 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
827 range of ELF gABI expressions including such constructs as
828 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
829 have been further restricted, and where in the past a dynamic string
830 token sequence may have been interpreted as a literal string it will
831 now cause a load failure. These load failures were always considered
832 unspecified behaviour from the perspective of the dynamic loader, and
833 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
834 results in a load failure now.
836 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
837 implementation includes all the standard functions provided by
840 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
841 thrd_detach, thrd_exit, and thrd_join for thread management.
843 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
844 mtx_destroy for mutual exclusion.
846 - call_once for function call synchronization.
848 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
849 cnd_wait for conditional variables.
851 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
853 Application developers must link against libpthread to use ISO C threads.
855 Deprecated and removed features, and other changes affecting compatibility:
857 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
858 installed. Software that was using either header should be updated to
859 use standard <stdio.h> interfaces instead.
861 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
862 This was never required by the C standard, and the macros just expanded
863 to call alternative names for the same functions. If you hoped getc and
864 putc would provide performance improvements over fgetc and fputc, instead
865 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
866 necessary, flockfile and funlockfile.
868 * All stdio functions now treat end-of-file as a sticky condition. If you
869 read from a file until EOF, and then the file is enlarged by another
870 process, you must call clearerr or another function with the same effect
871 (e.g. fseek, rewind) before you can read the additional data. This
872 corrects a longstanding C99 conformance bug. It is most likely to affect
873 programs that use stdio to read interactive input from a terminal.
876 * The macros 'major', 'minor', and 'makedev' are now only available from
877 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
878 headers that happen to include <sys/types.h>. These macros are rarely
879 used, not part of POSIX nor XSI, and their names frequently collide with
880 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
883 <sys/sysmacros.h> is a GNU extension. Portable programs that require
884 these macros should first include <sys/types.h>, and then include
885 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
887 * The tilegx*-*-linux-gnu configurations are no longer supported.
889 * The obsolete function ustat is no longer available to newly linked
890 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
891 function has been deprecated in favor of fstatfs and statfs.
893 * The obsolete function nfsservctl is no longer available to newly linked
894 binaries. This function was specific to systems using the Linux kernel
895 and could not usefully be used with the GNU C Library on systems with
896 version 3.1 or later of the Linux kernel.
898 * The obsolete function name llseek is no longer available to newly linked
899 binaries. This function was specific to systems using the Linux kernel
900 and was not declared in a header. Programs should use the lseek64 name
901 for this function instead.
903 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
904 getaddrinfo and getnameinfo functions have been deprecated. The behavior
905 previously selected by them is now always enabled.
907 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
908 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
909 restriction (rejecting '_' in host names, among other things) has been
910 removed, for increased compatibility with non-IDN name resolution.
912 * The fcntl function now have a Long File Support variant named fcntl64. It
913 is added to fix some Linux Open File Description (OFD) locks usage on non
914 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
915 fcntl and LFS support is handled transparently. Also for Linux, the OFD
916 locks act as a cancellation entrypoint.
918 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
919 ecb_crypt, and des_setparity are no longer available to newly linked
920 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
921 longer installed. These functions encrypted and decrypted data with the
922 DES block cipher, which is no longer considered secure. Software that
923 still uses these functions should switch to a modern cryptography library,
926 * Reflecting the removal of the encrypt and setkey functions above, the
927 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
928 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
931 * The obsolete function fcrypt is no longer available to newly linked
932 binaries. It was just another name for the standard function crypt,
933 and it has not appeared in any header file in many years.
935 * We have tentative plans to hand off maintenance of the passphrase-hashing
936 library, libcrypt, to a separate development project that will, we hope,
937 keep up better with new passphrase-hashing algorithms. We will continue
938 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
939 'crypt_r' should not need to change at all; however, distributions will
940 need to install <crypt.h> and libcrypt from a separate project.
942 In this release, if the configure option --disable-crypt is used, glibc
943 will not install <crypt.h> or libcrypt, making room for the separate
944 project's versions of these files. The plan is to make this the default
945 behavior in a future release.
947 Changes to build and runtime requirements:
949 GNU make 4.0 or later is now required to build glibc.
951 Security related changes:
953 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
954 been fixed by removing the glibc-internal IDNA implementation and using
955 the system-provided libidn2 library instead. Originally reported by Hanno
956 Böck and Christian Weisgerber.
958 CVE-2017-18269: An SSE2-based memmove implementation for the i386
959 architecture could corrupt memory. Reported by Max Horn.
961 CVE-2018-11236: Very long pathname arguments to realpath function could
962 result in an integer overflow and buffer overflow. Reported by Alexey
965 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
966 architecture could write beyond the target buffer, resulting in a buffer
967 overflow. Reported by Andreas Schwab.
969 The following bugs are resolved with this release:
971 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
972 [6889] manual: 'PWD' mentioned but not specified
973 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
974 when __WORDSIZE != 64
975 [13762] regex: re_search etc. should return -2 on memory exhaustion
976 [13888] build: /tmp usage during testing
977 [13932] math: dbl-64 pow unexpectedly slow for some inputs
978 [14092] nptl: Support C11 threads
979 [14095] localedata: Review / update collation data from Unicode / ISO
981 [14508] libc: -Wformat warnings
982 [14553] libc: Namespace pollution loff_t in sys/types.h
983 [14890] libc: Make NT_PRFPREG canonical.
984 [15105] libc: Extra PLT references with -Os
985 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
987 [16335] manual: Feature test macro documentation incomplete and out of
989 [16552] libc: Unify umount implementations in terms of umount2
990 [17082] libc: htons et al.: statement-expressions prevent use on global
991 scope with -O1 and higher
992 [17343] libc: Signed integer overflow in /stdlib/random_r.c
993 [17438] localedata: pt_BR: wrong d_fmt delimiter
994 [17662] libc: please implement binding for the new renameat2 syscall
995 [17721] libc: __restrict defined as /* Ignore */ even in c11
996 [17979] libc: inconsistency between uchar.h and stdint.h
997 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
998 [18023] libc: extend_alloca is broken (questionable pointer comparison,
999 horrible machine code)
1000 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1002 [18471] libc: llseek should be a compat symbol
1003 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1005 [18991] nss: nss_files skips large entry in database
1006 [19239] libc: Including stdlib.h ends up with macros major and minor being
1008 [19463] libc: linknamespace failures when compiled with -Os
1009 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1010 [19527] locale: Normalized charset name not recognized by setlocale
1011 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1012 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1014 [19728] network: out of bounds stack read in libidn function
1015 idna_to_ascii_4i (CVE-2016-6261)
1016 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1017 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1018 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1020 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1021 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1022 [20419] dynamic-link: files with large allocated notes crash in
1024 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1025 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1026 [20980] manual: CFLAGS environment variable replaces vital options
1027 [21163] regex: Assertion failure in pop_fail_stack when executing a
1028 malformed regexp (CVE-2015-8985)
1029 [21234] manual: use of CFLAGS makes glibc detect no optimization
1030 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1031 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1032 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1033 [21508] locale: intl/tst-gettext failure with latest msgfmt
1034 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1035 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1036 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1038 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1040 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1041 [22247] network: Integer overflow in the decode_digit function in
1042 puny_decode.c in libidn (CVE-2017-14062)
1043 [22342] nscd: NSCD not properly caching netgroup
1044 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1045 [22550] localedata: es_ES locale (and other es_* locales): collation
1046 should treat ñ as a primary different character, sync the collation
1047 for Spanish with CLDR
1048 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1049 by gcc configured with --enable-default-pie
1050 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1051 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1052 crossing 2GB threshold (CVE-2017-18269)
1053 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1055 [22735] time: Misleading typo in time.h source comment regarding
1057 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1058 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1059 `__assert_perror_fail ()' to `__assert_fail_base ()'
1060 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1062 [22786] libc: Stack buffer overflow in realpath() if input size is close
1063 to SSIZE_MAX (CVE-2018-11236)
1064 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1065 through an absolute DT_NEEDED path
1066 [22792] build: tcb-offsets.h dependency dropped
1067 [22797] libc: pkey_get() uses non-reserved name of argument
1068 [22807] libc: PTRACE_* constants missing for powerpc
1069 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1070 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1071 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1072 [22848] localedata: ca_ES: update date definitions from CLDR
1073 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1074 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1075 [22896] localedata: Update locale data for an_ES
1076 [22902] math: float128 test failures with GCC 8
1077 [22918] libc: multiple common of `__nss_shadow_database'
1078 [22919] libc: sparc32: backtrace yields infinite backtrace with
1080 [22926] libc: FTBFS on powerpcspe
1081 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1083 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1084 [22947] libc: FAIL: misc/tst-preadvwritev2
1085 [22963] localedata: cs_CZ: Add alternative month names
1086 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1087 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1088 [22998] dynamic-link: execstack tests are disabled when SELinux is
1090 [23005] network: Crash in __res_context_send after memory allocation
1092 [23007] math: strtod cannot handle -nan
1093 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1094 [23036] regex: regex equivalence class regression
1095 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1096 [23069] libc: sigaction broken on riscv64-linux-gnu
1097 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1098 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1099 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1100 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1101 and libc build with -Os)
1102 [23140] localedata: More languages need two forms of month names
1103 [23145] libc: _init/_fini aren't marked as hidden
1104 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1105 [23171] math: C++ iseqsig for long double converts arguments to double
1106 [23178] nscd: sudo will fail when it is run in concurrent with commands
1107 that changes /etc/passwd
1108 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1110 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1111 [23208] localedata: New locale - Lower Sorbian (dsb)
1112 [23233] regex: Memory leak in build_charclass_op function in file
1114 [23236] stdio: Harden function pointers in _IO_str_fields
1115 [23250] nptl: Offset of __private_ss differs from GCC
1116 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1117 -mtune=generic -mfpmath=sse
1118 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1120 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1121 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1123 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1124 [23277] math: nan function should not have const attribute
1125 [23279] math: scanf and strtod wrong for some hex floating-point
1126 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1128 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1129 [23303] build: undefined reference to symbol
1130 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1131 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1133 [23313] stdio: libio vtables validation and standard file object
1135 [23329] libc: The __libc_freeres infrastructure is not properly run across
1137 [23349] libc: Various glibc headers no longer compatible with
1139 [23351] malloc: Remove unused code related to heap dumps and malloc
1141 [23363] stdio: stdio-common/tst-printf.c has non-free license
1142 [23396] regex: Regex equivalence regression in single-byte locales
1143 [23422] localedata: oc_FR: More updates of locale data
1144 [23442] build: New warning with GCC 8
1145 [23448] libc: Out of bounds access in IBM-1390 converter
1146 [23456] libc: Wrong index_cpu_LZCNT
1147 [23458] build: tst-get-cpu-features-static isn't added to tests
1148 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1150 [23467] dynamic-link: x86/CET: A property note parser bug
1157 * The GNU C Library can now be compiled with support for building static
1158 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1159 executables are like static executables but can be loaded at any address
1160 and provide additional security hardening benefits at the cost of some
1161 memory and performance. When the library is built with --enable-static-pie
1162 the resulting libc.a is usable with GCC 8 and above to create static PIE
1163 executables using the GCC option '-static-pie'. This feature is currently
1164 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1165 aarch64 with binutils 2.30 or later.
1167 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1168 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1171 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1173 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1175 * In order to support faster and safer process termination the malloc API
1176 family of functions will no longer print a failure address and stack
1177 backtrace after detecting heap corruption. The goal is to minimize the
1178 amount of work done after corruption is detected and to avoid potential
1179 security issues in continued process execution. Reducing shutdown time
1180 leads to lower overall process restart latency, so there is benefit both
1181 from a security and performance perspective.
1183 * The abort function terminates the process immediately, without flushing
1184 stdio streams. Previous glibc versions used to flush streams, resulting
1185 in deadlocks and further data corruption. This change also affects
1186 process aborts as the result of assertion failures.
1188 * On platforms where long double has the IEEE binary128 format (aarch64,
1189 alpha, mips64, riscv, s390 and sparc), the math library now implements
1190 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1191 These are the same interfaces added in version 2.26 for some platforms where
1192 this format is supported but is not the format of long double.
1194 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1195 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1196 implements interfaces for that type, as defined by ISO/IEC TS
1197 18661-3:2015. These are corresponding interfaces to those supported for
1200 * The math library now implements interfaces for the _Float32, _Float64 and
1201 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1202 corresponding interfaces to those supported for _Float128.
1204 * glibc now implements the memfd_create and mlock2 functions on Linux.
1206 * Support for memory protection keys was added. The <sys/mman.h> header now
1207 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1210 * The copy_file_range function was added.
1212 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1214 * The ldconfig utility now processes `include' directives using the C/POSIX
1215 collation ordering. Previous glibc versions used locale-specific
1216 ordering, the change might break systems that relied on that.
1218 * Support for two grammatical forms of month names has been added.
1219 In a call to strftime, the "%B" and "%b" format specifiers will now
1220 produce the grammatical form required when the month is used as part
1221 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1222 required when the month is named by itself. For instance, in Greek
1223 and in many Slavic and Baltic languages, "%B" will produce the month
1224 in genitive case, and "%OB" will produce the month in nominative case.
1226 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1227 are all valid and will all accept any known form of month
1228 name---standalone or complete, abbreviated or full. In a call to
1229 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1230 the strings used by "%B" and "%b", respectively. New query
1231 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1232 used by "%OB" and "%Ob", respectively.
1234 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1235 define the strings for %OB and %Ob, respectively; these have the
1236 same syntax as "mon" and "abmon". These arrays are optional; if they
1237 are not provided then they have the same content as "mon" and "abmon",
1240 These features are provided for locales which define "alt_mon" and/or
1241 "ab_alt_mon" in their locale source data. This release includes such
1242 alternative month name data for the following languages: Belarusian,
1243 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1245 This feature is currently a GNU extension, but it is expected to
1246 be added to the next revision of POSIX, and it is also already
1247 available on some BSD-derived operating systems.
1249 This feature will cause existing statically compiled applications
1250 to fail to load locales and fall back to the builtin C/POSIX locales.
1251 See notes below for other changes affecting compatibility.
1253 * Support for the RISC-V ISA running on Linux has been added. This port
1254 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1255 for the following ISA and ABI pairs:
1261 Deprecated and removed features, and other changes affecting compatibility:
1263 * Statically compiled applications attempting to load locales compiled for the
1264 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1265 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1266 support for two grammatical forms of the month names, also extends the locale
1267 data binary format. Static applications needing locale support must be
1268 recompiled to match the runtime and data they are deployed with. In some
1269 distributions there is an upgrade window where dynamically linked applications
1270 may use a new library but the old locale data and also fall back to the
1271 builtin C/POSIX locales; restarting the application process is sufficient to
1274 * Support for statically linked applications which call dlopen is deprecated
1275 and will be removed in a future version of glibc. Applications which call
1276 dlopen need to be linked dynamically instead.
1278 * Support for old programs which use internal stdio data structures and
1279 functions is deprecated. This includes programs which use the C++ streams
1280 provided by libstdc++ in GCC 2.95. Programs which use the internal
1281 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1282 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1283 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1284 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1285 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1286 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1287 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1288 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1289 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1290 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1291 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1292 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1293 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1294 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1295 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1296 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1297 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1298 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1299 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1300 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1301 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1302 future version of glibc. Unlike other symbol removals, these old
1303 applications will not be supported using compatibility symbols.
1305 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1306 defined by <sys/ptrace.h>.
1308 * libm no longer supports SVID error handling (calling a user-provided
1309 matherr function on error) or the _LIB_VERSION variable to control error
1310 handling. (SVID error handling and the _LIB_VERSION variable still work
1311 for binaries linked against older versions of the GNU C Library.) The
1312 libieee.a library is no longer provided. math.h no longer defines struct
1313 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1314 TLOSS, PLOSS and HUGE.
1316 * The libm functions pow10, pow10f and pow10l are no longer supported for
1317 new programs. Programs should use the standard names exp10, exp10f and
1318 exp10l for these functions instead.
1320 * The mcontext_t type is no longer the same as struct sigcontext. On
1321 platforms where it was previously the same, this changes the C++ name
1322 mangling for interfaces involving this type.
1324 * The add-ons mechanism for building additional packages at the same time as
1325 glibc has been removed. The --enable-add-ons configure option is now
1328 * The --without-fp configure option is now ignored. Whether hardware
1329 floating-point instructions are used is now configured based on whether
1330 the compiler used at configure time (without any options implied by a
1331 --with-cpu= configure option) uses such instructions.
1333 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1334 the specified string can be parsed as a domain name.
1336 * In the malloc_info output, the <heap> element may contain another <aspace>
1337 element, "subheaps", which contains the number of sub-heaps.
1339 * The libresolv function p_secstodate is no longer supported for new
1342 * The tilepro-*-linux-gnu configuration is no longer supported.
1344 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1345 and will be removed in a future release. Software that is still using
1346 either header should be updated to use standard <stdio.h> interfaces
1349 libio.h was originally the header for a set of supported GNU extensions,
1350 but they have not been maintained as such in many years, they are now
1351 standing in the way of improvements to stdio, and we don't think there are
1352 any remaining external users. _G_config.h was never intended for public
1353 use, but predates the bits convention.
1355 Changes to build and runtime requirements:
1357 * bison version 2.7 or later is required to generate code in the 'intl'
1360 Security related changes:
1362 CVE-2009-5064: The ldd script would sometimes run the program under
1363 examination directly, without preventing code execution through the
1364 dynamic linker. (The glibc project disputes that this is a security
1365 vulnerability; only trusted binaries must be examined using the ldd
1368 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1369 suffered from a one-byte overflow during ~ operator processing (either
1370 on the stack or the heap, depending on the length of the user name).
1371 Reported by Tim RĂŒhsen.
1373 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1374 would sometimes fail to free memory allocated during ~ operator
1375 processing, leading to a memory leak and, potentially, to a denial
1378 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1379 without GLOB_NOESCAPE, could write past the end of a buffer while
1380 unescaping user names. Reported by Tim RĂŒhsen.
1382 CVE-2017-17426: The malloc function, when called with an object size near
1383 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1384 instead of NULL. This was a regression introduced with the new malloc
1385 thread cache in glibc 2.26. Reported by Iain Buclaw.
1387 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1388 to the allocation of too much memory. (This is not a security bug per se,
1389 it is mentioned here only because of the CVE assignment.) Reported by
1392 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1393 of the number of search path components. (This is not a security
1394 vulnerability per se because no trust boundary is crossed if the fix for
1395 CVE-2017-1000366 has been applied, but it is mentioned here only because
1396 of the CVE assignment.) Reported by Qualys.
1398 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1399 for AT_SECURE or SUID binaries could be used to load libraries from the
1402 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1403 succeeds without returning an absolute path due to unexpected behaviour
1404 of the Linux kernel getcwd syscall. Reported by halfdog.
1406 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1407 an object size near the value of SIZE_MAX, would return a pointer to a
1408 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1410 CVE-2018-6551: The malloc function, when called with an object size near
1411 the value of SIZE_MAX, would return a pointer to a buffer which is too
1412 small, instead of NULL.
1414 The following bugs are resolved with this release:
1416 [866] glob: glob should match dangling symlinks
1417 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1418 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1420 [5997] math: Very slow execution of sinf function
1421 [10580] localedata: hr_HR: updated locale
1422 [10871] locale: 'mon' array should contain both nominative and genitive
1424 [12349] localedata: eu_ES: incorrect thousands separator
1425 [13605] localedata: shn_MM: new Shan locale
1426 [13805] localedata: ru_RU: currency should use ',' as radix point
1427 [13953] localedata: km_KH: locale update
1428 [13994] localedata: mjw_IN: new locale
1429 [14121] build: make writes .mo files in po directory
1430 [14333] libc: Fix the race between atexit() and exit()
1431 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1432 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1434 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1435 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1436 width Latin characters
1437 [15332] localedata: es_CU: locale update
1438 [15436] stdio: Don't close or flush stdio streams on abort
1439 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1441 [16148] localedata: ca_ES: incorrect thousands separator
1442 [16750] dynamic-link: ldd should not try to execute the binaries
1444 [16777] localedata: pl_PL: incorrect thousands separator in locale
1445 [16905] localedata: hanzi: new collation
1446 [17563] localedata: cmn_TW: add hanzi collation
1447 [17750] localedata: wrong collation order of diacritics in most locales
1448 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1450 [17956] build: Build fails on missing definitions from header file
1451 nss/nss.h when Mozilla NSS is used for cryptography
1452 [18203] libc: realpath() does not handle unreachable paths correctly
1453 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1454 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1455 [18822] libc: Internal functions are called via PLT
1456 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1457 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1458 [19574] libc: glibc should support building static PIE binaries
1459 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1461 [19971] glob: glob: Do not skip entries with zero d_ino values
1462 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1463 [20008] localedata: km_KH: convert to translit_neutral
1464 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1465 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1466 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1467 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1468 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1470 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1471 they're set, wrong errors returned by gaih_inet when lookup functions
1473 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1474 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1476 [20952] localedata: yuw_PG: new locale
1477 [21084] localedata: charmaps/IBM858: new codepage
1478 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1479 [21242] libc: assert gives pedantic warning in old gcc versions
1480 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1481 __regcall calling convention
1482 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1483 [21326] libc: C99 functions are not declared for C++11 and later if
1484 _GNU_SOURCE is not predefined by g++
1485 [21457] libc: sys/ucontext.h namespace
1486 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1487 [21660] math: GCC fails to compile a formula with tgmath.h
1488 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1489 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1490 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1491 [21684] math: tgmath.h handling of complex integers
1492 [21685] math: tgmath.h handling of bit-fields
1493 [21686] math: tgmath.h handling of __int128
1494 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1496 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1498 [21750] localedata: column width of characters incompatible with classical
1500 [21754] malloc: malloc: Perform as little work as possible after heap
1501 consistency check failures
1502 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1503 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1504 [21791] string: Unused XXX_chk_XXX functions in libc.a
1505 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1507 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1509 [21845] localedata: Added new Locale bho_NP
1510 [21853] localedata: Fix abday Which looks same as day in zh_SG
1511 [21854] localedata: Added New Locale en_SC
1512 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1513 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1514 _dl_runtime_resolve_avx_slow
1515 [21885] network: getaddrinfo: gethosts does not release resolver context
1516 on memory allocation failure
1517 [21899] libc: XPG4.2 sigaction namespace
1518 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1520 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1522 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1523 errno value, causing getaddrinfo to fail
1524 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1525 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1526 instead of EAI_NODATA
1527 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1528 constant PTRACE_SEIZE_DEVEL
1529 [21930] math: C-only gcc builtins used in <math.h> isinf
1530 [21932] network: Unpaired __resolv_context_get in generic get*_r
1532 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1533 [21944] libc: sigval namespace
1534 [21951] localedata: Update hanzi collation by stroke
1535 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1536 sysdeps/x86_64/fpu/e_expf.S
1537 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1538 allocation in syscall loops)
1539 [21959] localedata: Fix Country name for xh_ZA
1540 [21960] localedata: Fix abmon for bem_ZM
1541 [21966] math: AVX2 mathvec functions use FMA without checking
1542 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1543 [21971] localedata: Added New Locale for mfe_MU
1544 [21972] libc: assert macro requires operator== (int) for its argument type
1545 [21973] math: [sparc] libm missing sqrtl compat symbol
1546 [21974] libc: Remove __bb_init_func and __bb_exit_func
1547 [21982] string: stratcliff.c: error: assuming signed overflow does not
1549 [21986] stdio: __guess_grouping is called incorrectly
1550 [21987] math: [sparc32] wrong bits/long-double.h installed
1551 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1553 [22022] localedata: Missing country_name for mni_IN
1554 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1556 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1558 [22026] locale: iconv_open: heap overflow on gconv_init failure
1559 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1560 [22035] math: [m68k] bits/math-inline.h macro namespace
1561 [22038] localedata: Fix abbreviated weeks and months for Somali
1562 [22044] localedata: Remove redundant data for Limburgish Language
1563 [22050] malloc: Linking with -lmcheck does not hook
1564 __malloc_initialize_hook correctly
1565 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1566 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1567 [22070] localedata: charmaps/UTF-8: wcwidth for
1568 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1569 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1570 Jungseong and Jongseong) should be 0
1571 [22078] nss: nss_files performance issue in multi mode
1572 [22082] math: bits/math-finite.h exp10 condition
1573 [22086] libc: pcprofiledump incorrect cross-endian condition
1574 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1575 [22095] network: Name server address allocation memory leak in resolv.conf
1577 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1579 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1580 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1582 [22111] malloc: malloc: per thread cache is not returned when thread exits
1583 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1584 [22134] libc: [linux] implement fexecve with execveat
1585 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1587 [22145] libc: ttyname() gives up too early in the face of namespaces
1588 [22146] math: C++ build issue with float128 on x86_64
1589 [22153] nptl: nptl: save error code before process termination
1590 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1591 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1592 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1593 [22165] libc: [hppa] Text relocations in libc.so
1594 [22180] libc: destructor registered via __cxa_atexit is called twice
1595 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1596 symlinks") cause "make" segfaults
1597 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1599 [22207] libc: FAIL: stdlib/test-atexit-race
1600 [22225] math: nearbyint arithmetic moved before feholdexcept
1601 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1602 [22235] math: iscanonical in C++ and float128
1603 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1604 the svid compat wrapper
1605 [22244] math: ynf and yn are wrong without the svid compat wrapper
1606 [22273] libc: Improper assert in Linux posix_spawn implementation
1607 [22284] libc: -pg -pie doesn't work
1608 [22292] locale: localedef exits with error 4 when it should be error 1
1609 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1610 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1612 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1613 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1615 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1616 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1617 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1618 [22322] libc: [mips64] wrong bits/long-double.h installed
1619 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1620 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1622 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1623 [22343] malloc: Integer overflow in posix_memalign
1624 [22347] libc: getrandom() returns the number of bytes that were copied to
1625 the buffer even though the comments say "Return 0 on success and -1 on
1627 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1628 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1630 [22370] dynamic-link: Incorrect note padding check
1631 [22375] libc: malloc returns pointer from tcache_get when should return
1632 NULL (CVE-2017-17426)
1633 [22377] math: iseqsig, float128 and C++
1634 [22382] localedata: Error in tpi_PG locale
1635 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1636 inside the ASCII printable range
1637 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1639 [22403] localedata: Slash needs escaping in some locales
1640 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1641 [22409] network: res_hnok does not accept some host names used on the
1643 [22412] network: res_dnok, res_hnok should perform syntax checks
1644 [22413] network: ns_name_pton ignores syntactically invalid trailing
1646 [22415] stdio: setvbuf can lead to invalid free/segfault
1647 [22432] build: Non-deterministic build
1648 [22439] malloc: malloc_info should compute summary statistics for all sub-
1650 [22442] network: if_nametoindex could report index for the wrong
1651 networking interface
1652 [22446] build: aliasing violation calling readlink in handle_request
1653 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1654 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1655 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1656 __nscd_hash/__nss_hash
1657 [22463] network: p_secstodate overflow handling
1658 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1659 [22478] libc: sigwait can fail with EINTR
1660 [22505] libc: ldconfig processes include directive in locale-specific
1662 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1663 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1664 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1665 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1666 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1667 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1668 same as for Croatian
1669 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1670 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1671 [22577] libc: missing newline after "cannot allocate TLS data structures
1673 [22588] manual: manual/conf.texi: missing underscore in front of
1675 [22593] math: nextafter and nexttoward are declared with const attribute
1676 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1677 [22603] string: ia64 memchr overflows internal pointer check
1678 [22605] libc: SH clone does not set the exit code correctly
1679 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1681 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1682 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1683 modified in case of success
1684 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1685 [22615] manual: manual: ambiguous wording about errno value in case of
1687 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1689 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1690 binaries or if /proc is not mounted (CVE-2017-16997)
1691 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1692 [22630] build: $(no-pie-ldflag) is no longer effective
1693 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1694 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1695 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1696 [22637] nptl: guard size is subtracted from thread stack size instead of
1698 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1699 [22657] localedata: hu_HU: Avoid double space in date
1700 [22660] math: fmax, fmin sNaN handling on alpha
1701 [22664] libc: New warning of GCC8
1702 [22665] math: alpha: ceil and floor raise inexact exceptions
1703 [22666] math: alpha: trunc raise inexact exceptions
1704 [22667] libc: makecontext lacks stack alignment on i386
1705 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1706 [22679] libc: getcwd(3) can succeed without returning an absolute path
1708 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1709 elision and tunables
1710 [22687] math: [powerpc-nofpu] complex long double functions spurious
1712 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1713 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1714 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1716 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1717 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1719 [22701] nis: Incomplete removal of libnsl
1720 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1721 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1722 [22715] dynamic-link: FAIL: elf/tst-audit10
1723 [22719] libc: Backtrace tests fail on hppa
1724 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1725 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1726 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1727 before the first call to crypt_r () in crypt/badsalttest.c
1734 * A per-thread cache has been added to malloc. Access to the cache requires
1735 no locks and therefore significantly accelerates the fast path to allocate
1736 and free small amounts of memory. Refilling an empty cache requires locking
1737 the underlying arena. Performance measurements show significant gains in a
1738 wide variety of user workloads. Workloads were captured using a special
1739 instrumented malloc and analyzed with a malloc simulator. Contributed by
1740 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1742 * Unicode 10.0.0 Support: Character encoding, character type info, and
1743 transliteration tables are all updated to Unicode 10.0.0, using
1744 generator scripts contributed by Mike FABIAN (Red Hat).
1745 These updates cause user visible changes, especially the changes in
1746 wcwidth for many emoji characters cause problems when emoji sequences
1747 are rendered with pango, see for example:
1748 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1750 * Collation of Hungarian has been overhauled and is now consistent with "The
1751 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1754 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1756 - The GNU C Library will now detect when /etc/resolv.conf has been
1757 modified and reload the changed configuration. The new resolver option
1758 âno-reloadâ (RES_NORELOAD) disables this behavior.
1760 - The GNU C Library now supports an arbitrary number of search domains
1761 (configured using the âsearchâ directive in /etc/resolv.conf);
1762 previously, there was a hard limit of six domains. For backward
1763 compatibility, applications that directly modify the â_resâ global
1764 object are still limited to six search domains.
1766 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1767 Library will now randomly pick a name server from the configuration as a
1768 starting point. (Previously, the second name server was always used.)
1770 * The tunables feature is now enabled by default. This allows users to tweak
1771 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1773 * New function reallocarray, which resizes an allocated block (like realloc)
1774 to the product of two sizes, with a guaranteed clean failure upon integer
1775 overflow in the multiplication. Originally from OpenBSD, contributed by
1776 Dennis Wölfing and RĂŒdiger Sonderfeld.
1778 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1779 These are extended versions of preadv and pwritev, respectively, taking an
1780 additional flags argument. The set of supported flags depends on the
1781 running kernel; full support currently requires kernel 4.7 or later.
1783 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1784 create a new session ID for the spawned process. This feature is
1785 scheduled to be added to the next major revision of POSIX; for the time
1786 being, it is available under _GNU_SOURCE.
1788 * errno.h is now safe to use from C-preprocessed assembly language on all
1789 supported operating systems. In this context, it will only define the
1790 Exxxx constants, as preprocessor macros expanding to integer literals.
1792 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1793 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1794 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1795 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1797 To compile programs that use this feature, the compiler must support
1798 128-bit floating point with the type name _Float128 (as defined by TS
1799 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1800 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1801 must be defined to make the new interfaces visible.
1803 The new functions and macros correspond to those present for other
1804 floating-point types (except for a few obsolescent interfaces not
1805 supported for the new type), with F128 or f128 suffixes; for example,
1806 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1807 printf or scanf formats for the new type; the strfromf128 and strtof128
1808 interfaces should be used instead.
1810 Deprecated and removed features, and other changes affecting compatibility:
1812 * The synchronization that pthread_spin_unlock performs has been changed to
1813 now be equivalent to a C11 atomic store with release memory order to the
1814 spin lock's memory location. Previously, several (but not all)
1815 architectures used stronger synchronization (e.g., containing what is
1816 often called a full barrier). This change can improve performance, but
1817 may affect odd fringe uses of spin locks that depend on the previous
1818 behavior (e.g., using spin locks as atomic variables to try to implement
1819 Dekker's mutual exclusion algorithm).
1821 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1824 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1825 will only be built and installed when the GNU C Library is configured with
1826 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1827 as TIRPC or rpcsvc-proto, to be used.
1829 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1830 libnss_compat, are deprecated, and will not be built or installed by
1833 The NIS(+) support library, libnsl, is also deprecated. By default, a
1834 compatibility shared library will be built and installed, but not headers
1835 or development libraries. Only a few NIS-related programs require this
1836 library. (In particular, the GNU C Library has never required programs
1837 that use 'gethostbyname' to be linked with libnsl.)
1839 Replacement implementations based on TIRPC, which additionally support
1840 IPv6, are available from <https://github.com/thkukuk/>. The configure
1841 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1842 name service modules, to be built and installed.
1844 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1845 support is enabled, the configured recursive resolver must support EDNS.
1846 (Responding to EDNS-enabled queries with responses which are not
1847 EDNS-enabled is fine, but FORMERR responses are not.)
1849 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1850 servers have not supported this opcode for a long time.
1852 * The _res_opcodes variable has been removed from libresolv. It had been
1853 exported by accident.
1855 * <string.h> no longer includes inline versions of any string functions,
1856 as this kind of optimization is better done by the compiler. The macros
1857 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1859 * The nonstandard header <xlocale.h> has been removed. Most programs should
1860 use <locale.h> instead. If you have a specific need for the definition of
1861 locale_t with no other declarations, please contact
1862 libc-alpha@sourceware.org and explain.
1864 * The obsolete header <sys/ultrasound.h> has been removed.
1866 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1868 * The obsolete function cfree has been removed. Applications should use
1871 * The stack_t type no longer has the name struct sigaltstack. This changes
1872 the C++ name mangling for interfaces involving this type.
1874 * The ucontext_t type no longer has the name struct ucontext. This changes
1875 the C++ name mangling for interfaces involving this type.
1877 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1878 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1879 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1880 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1881 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1882 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1883 fpregset_t type no longer has the name struct fpu. This changes the C++
1884 name mangling for interfaces involving those types.
1886 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1887 synced with the kernel:
1889 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1890 are not supported on this architecture and have been removed.
1892 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1893 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1894 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1896 Programs that assume the GET/SETREGS ptrace requests are universally
1897 available will now fail to build, instead of malfunctioning at runtime.
1899 Changes to build and runtime requirements:
1901 * Linux kernel 3.2 or later is required at runtime, on all architectures
1902 supported by that kernel. (This is a change from version 2.25 only for
1905 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1907 * On most architectures, GCC 4.9 or later is required to build the GNU C
1908 Library. On powerpc64le, GCC 6.2 or later is required.
1910 Older GCC versions and non-GNU compilers are still supported when
1911 compiling programs that use the GNU C Library. (We do not know exactly
1912 how old, and some GNU extensions to C may be _de facto_ required. If you
1913 are interested in helping us make this statement less vague, please
1914 contact libc-alpha@sourceware.org.)
1916 Security related changes:
1918 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1919 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1921 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1922 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1924 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1925 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1928 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1929 fixed (CVE-2017-12133).
1931 The following bugs are resolved with this release:
1933 [984] network: Respond to changed resolv.conf in gethostbyname
1934 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1935 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1937 [12189] libc: __stack_chk_fail should not attempt a backtrace
1939 [14096] time: Race condition on timezone/tst-timezone.out
1940 [14172] localedata: az_IR: new locale
1941 [14995] build: glibc fails to build if gold is the default linker, even if
1943 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1944 [16637] network: inet_pton function is accepting IPv6 with bad format
1945 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1946 x86 and other generic code
1947 [16875] localedata: ko_KR: fix lang_name
1948 [17225] localedata: ar_SY: localized month names for May and June are
1950 [17297] localedata: da_DK: wrong date_fmt string
1951 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1952 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1953 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1954 [19066] localedata: ar_SA abbreviated day and month names are in English
1955 [19569] network: resolv: Support an arbitrary number of search domains
1956 [19570] network: Implement random DNS server selection in the stub
1958 [19838] locale: localedef fails on PA-RISC
1959 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1960 order of 0D36 and 0D37
1961 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1963 [20098] libc: FAIL: debug/backtrace-tst on hppa
1964 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1966 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1968 [20313] localedata: Update locale data to Unicode 9.0
1969 [20424] manual: Document how to provide a malloc replacement
1970 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1972 [20686] locale: Add el_GR@euro to SUPPORTED.
1973 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1974 failures consistently
1975 [21015] dynamic-link: Document and fix --enable-bind-now
1976 [21016] nptl: pthread_cond support is broken on hppa
1977 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1978 frame-pointer on i386
1979 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1981 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1982 [21088] libc: Build fails with --enable-static-nss
1983 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1984 generic c code is used
1985 [21109] libc: Tunables broken on big-endian
1986 [21112] math: powf has large ulp errors with base close to 1 and exponent
1988 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1990 [21120] malloc: glibc malloc is incompatible with GCC 7
1991 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1993 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1994 (-0.0) when linking with -lieee
1995 [21171] math: log10, log2 and lgamma return incorrect results
1996 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1997 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1998 [21207] localedata: ce_RU: update weekdays from CLDR
1999 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2000 [21217] localedata: Update months from CLDR-31
2001 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2002 [21243] libc: support_delete_temp_file should issue warning for failed
2004 [21244] libc: support resolv_test_start() socket fd close should be
2006 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2007 new posix_spawn implementation
2008 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2009 leads to lower CPU frequency
2010 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2011 [21261] libc: [sparc64] bits/setjmp.h namespace
2012 [21267] network: [mips] bits/socket.h IOC* namespace
2013 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2014 [21270] libc: mmap64 silently truncates large offset values
2015 [21275] libc: posix_spawn always crashes on ia64 now
2016 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2017 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2018 [21289] libc: Incorrect declaration for 32-bit platforms with
2019 _FILE_OFFSET_BITS=64 causes build error
2020 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2021 not support gethostbyname4_r
2022 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2024 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2026 [21340] libc: Support POSIX_SPAWN_SETSID
2027 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2028 [21359] network: ns_name_pack needs additional byte in destination buffer
2029 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2030 against fragmentation attacks (CVE-2017-12132)
2031 [21369] network: resolv: Remove EDNS fallback
2032 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2034 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2035 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2036 [21393] stdio: Missing dup3 error check in freopen, freopen64
2037 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2038 [21399] localedata: Bad description for U00EC in
2039 localedata/charmaps/CP1254
2040 [21411] malloc: realloc documentation error
2041 [21426] network: sys/socket.h uio.h namespace
2042 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2043 [21445] libc: signal.h bsd_signal namespace
2044 [21455] network: Network headers stdint.h namespace
2045 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2047 [21475] network: resolv: Overlong search path is truncated mid-label
2048 [21511] libc: sigstack namespace
2049 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2050 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2051 bits/syscall.h: No such file or directory
2052 [21517] libc: struct sigaltstack namespace
2053 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2054 [21533] localedata: Update locale data to Unicode 10.0
2056 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2057 junk at end of line, first unrecognized character is `@'
2058 [21538] libc: SIG_HOLD missing for XPG4
2059 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2060 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2061 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2062 [21543] libc: sigevent namespace
2063 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2064 size for general purpose registers in mcontext_t structure
2065 [21550] libc: sigwait namespace
2066 [21552] libc: XPG4 bsd_signal namespace
2067 [21554] libc: sigpause namespace
2068 [21560] libc: sys/wait.h signal.h namespace
2069 [21561] libc: waitid namespace
2070 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2071 '/usr/include/stdlib.h': Permission denied
2072 [21575] libc: sys/wait.h missing struct rusage definition
2073 [21584] libc: sigaltstack etc namespace
2074 [21597] libc: siginterrupt namespace
2075 [21607] math: hppa: FAIL: math/test-tgmath
2076 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2078 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2079 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2080 stack and heap (CVE-2017-1000366)
2081 [21625] libc: wait3 namespace
2082 [21654] nss: Incorrect pointer alignment in NSS group merge result
2084 [21657] network: Parse interface zone id for node-local multicast
2085 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2087 [21666] libc: .symver is used on common symbol
2088 [21668] network: resolv: res_init cross-thread broadcast introduces race
2090 [21687] math: tgmath.h totalorder, totalordermag return type
2091 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2093 [21696] libc: Incorrect assumption of of __cpu_mask in
2094 posix/sched_cpucount.c
2095 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2096 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2098 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2099 leading to relocation crash
2100 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2101 `resolv_conf_matches (resp, conf)' failed.
2102 [21710] localedata: Added Samoan language locale for Samoa
2103 [21711] localedata: Pashto yesstr/nostr locale are missing
2104 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2105 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2106 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2107 [21723] localedata: yesstr/nostr missing for Chinese language locale
2108 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2110 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2112 [21728] localedata: New Locale for Tongan language
2113 [21729] localedata: incorrect LC_NAME fields for hi_IN
2114 [21733] localedata: yesstr and nostr are missing for zh_HK
2115 [21734] localedata: Missing yesstr and nostr are for kw_GB
2116 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2117 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2118 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2119 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2121 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2123 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2125 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2126 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2127 [21759] localedata: missing yesstr and nostr for Tigrinya
2128 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2129 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2130 [21767] localedata: Missing Bislama locales
2131 [21768] localedata: Missing yesstr and nostr for aa_ET
2132 [21770] localedata: Missing Field in li_NL
2133 [21778] nptl: Robust mutex may deadlock
2134 [21779] libc: MicroBlaze segfaults when loading libpthread
2135 [21783] localedata: Fix int_select international_call_prefixes
2136 [21784] localedata: Inconsistency in country_isbn
2137 [21788] localedata: Missing Country Postal Abbreviations
2138 [21794] localedata: Added-country_isbn-for-Italy
2139 [21795] localedata: Add/Fix country_isbn for France
2140 [21796] localedata: Added country_isbn for Republic of Korea
2141 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2142 [21799] localedata: Added int_select international_call_prefixes
2143 [21801] localedata: Added int_select international_call_prefixes
2144 [21804] nptl: Double semicolon in thread-shared-types.h
2145 [21807] localedata: LC_ADDRESS fix for pap_CW
2146 [21808] localedata: Fix LC_ADDRESS for pap_AW
2147 [21821] localedata: Added country_name in mai_IN
2148 [21822] localedata: Fix LC_TIME for mai_IN
2149 [21823] localedata: missing yesstr, nostr for sa_IN
2150 [21825] localedata: Fix name_mrs for mag_IN
2151 [21828] localedata: 2.26 changelog should mention user visible changes
2153 [21835] localedata: Added Maithili language locale for Nepal
2154 [21838] localedata: Removed redundant data for the_NP
2155 [21839] localedata: Fix LC_MONETARY for ta_LK
2156 [21844] localedata: Fix Latin characters and Months Sequence.
2157 [21848] localedata: Fix mai_NP Title Name
2162 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2163 24731-2:2010, is supported to enable declarations of functions from that
2164 TR. Note that not all functions from that TR are supported by the GNU C
2167 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2168 18661-1:2014, is supported to enable declarations of functions and macros
2169 from that TS. Note that not all features from that TS are supported by
2172 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2173 18661-4:2015, is supported to enable declarations of functions and macros
2174 from that TS. Note that most features from that TS are not supported by
2177 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2178 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2179 Since the GNU C Library defaults to a much newer revision of POSIX, this
2180 will only affect programs that specifically request an old conformance
2181 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2182 see a change in the visible declarations, but a program compiled with
2183 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2186 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2187 defined by all multithreaded code, but glibc has not required this for
2190 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2191 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2192 will only be available from <sys/sysmacros.h>.
2194 These macros are not part of POSIX nor XSI, and their names frequently
2195 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2196 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2197 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2200 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2201 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2202 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2204 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2205 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2206 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2207 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2208 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2209 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2210 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2211 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2212 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2213 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2214 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2217 * New <math.h> features are added from TS 18661-1:2014:
2219 - Signaling NaN macros: SNANF, SNAN, SNANL.
2221 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2222 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2223 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2225 - llogb functions: the llogb, llogbf and llogbl functions, and the
2226 FP_LLOGB0 and FP_LLOGBNAN macros.
2228 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2231 - Comparison macros: iseqsig.
2233 - Classification macros: iscanonical, issubnormal, iszero.
2235 - Total order functions: totalorder, totalorderf, totalorderl,
2236 totalordermag, totalordermagf, totalordermagl.
2238 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2240 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2241 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2243 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2244 are added to libc. They convert a floating-point number into string.
2246 * Most of glibc can now be built with the stack smashing protector enabled.
2247 It is recommended to build glibc with --enable-stack-protector=strong.
2248 Implemented by Nick Alcock (Oracle).
2250 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2251 intended to be used instead of memset() to erase sensitive data after use;
2252 the compiler will not optimize out calls to explicit_bzero even if they
2253 are "unnecessary" (in the sense that no _correct_ program can observe the
2254 effects of the memory clear).
2256 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2257 to float instead of double. This does not affect the ABI of any libraries
2258 that are part of the GNU C Library, but may affect the ABI of other
2259 libraries that use this type in their interfaces.
2261 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2262 float_t and double_t types are now defined to long double instead of float
2263 and double. These options are not the default, and this does not affect
2264 the ABI of any libraries that are part of the GNU C Library, but it may
2265 affect the ABI of other libraries that use this type in their interfaces,
2266 if they are compiled or used with those options.
2268 * The getentropy and getrandom functions, and the <sys/random.h> header file
2271 * The buffer size for byte-oriented stdio streams is now limited to 8192
2272 bytes by default. Previously, on Linux, the default buffer size on most
2273 file systems was 4096 bytes (and thus remains unchanged), except on
2274 network file systems, where the buffer size was unpredictable and could be
2275 as large as several megabytes.
2277 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2278 for the Linux quota interface which predates kernel version 2.4.22 has
2281 * The malloc_get_state and malloc_set_state functions have been removed.
2282 Already-existing binaries that dynamically link to these functions will
2283 get a hidden implementation in which malloc_get_state is a stub. As far
2284 as we know, these functions are used only by GNU Emacs and this change
2285 will not adversely affect already-built Emacs executables. Any undumped
2286 Emacs executables, which normally exist only during an Emacs build, should
2287 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2289 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2290 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2291 âno-ip6-dotintâ had already been the default, and support for the
2292 âip6-dotintâ option was removed from the Internet in 2006.
2294 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2295 flag from <resolv.h> have been removed. The option relied on a
2296 backwards-incompatible DNS extension which was never deployed on the
2299 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2300 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2301 They were already unimplemented.
2303 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2304 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2305 removed again from the IETF name lookup interface specification in RFC
2306 2553. Applications should use getaddrinfo instead.
2308 * DNSSEC-related declarations and definitions have been removed from the
2309 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2310 decode the data part of DNSSEC record types. Previous versions of glibc
2311 only implemented minimal support for the previous version of DNSSEC, which
2312 is incompatible with the currently deployed version.
2314 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2315 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2316 <arpa/nameser.h> header file because the distinction between RR types and
2317 meta-RR types is not officially standardized, subject to revision, and
2318 thus not suitable for encoding in a macro.
2320 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2321 and rhook members of the res_state type in <resolv.h> have been removed.
2322 The glibc stub resolver did not support these hooks, but the header file
2323 did not reflect that.
2325 * For multi-arch support it is recommended to use a GCC which has
2326 been built with support for GNU indirect functions. This ensures
2327 that correct debugging information is generated for functions
2328 selected by IFUNC resolvers. This support can either be enabled by
2329 configuring GCC with '--enable-gnu-indirect-function', or by
2330 enabling it by default by setting 'default_gnu_indirect_function'
2331 variable for a particular architecture in the GCC source file
2334 * GDB pretty printers have been added for mutex and condition variable
2335 structures in POSIX Threads. When installed and loaded in gdb these pretty
2336 printers show various pthread variables in human-readable form when read
2337 using the 'print' or 'display' commands in gdb.
2339 * Tunables feature added to allow tweaking of the runtime for an application
2340 program. This feature can be enabled with the '--enable-tunables' configure
2341 flag. The GNU C Library manual has details on usage and README.tunables has
2342 instructions on adding new tunables to the library.
2344 * A new version of condition variables functions have been implemented in
2345 the NPTL implementation of POSIX Threads to provide stronger ordering
2348 * A new version of pthread_rwlock functions have been implemented to use a more
2349 scalable algorithm primarily through not using a critical section anymore to
2352 Security related changes:
2354 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2355 have been created with makecontext could fail to terminate due to a
2356 missing .cantunwind annotation. This has been observed to lead to a hang
2357 (denial of service) in some Go applications compiled with gccgo. Reported
2358 by Andreas Schwab. (CVE-2016-6323)
2360 * The DNS stub resolver functions would crash due to a NULL pointer
2361 dereference when processing a query with a valid DNS question type which
2362 was used internally in the implementation. The stub resolver now uses a
2363 question type which is outside the range of valid question type values.
2366 The following bugs are resolved with this release:
2368 [4099] stdio: Overly agressive caching by stream i/o functions.
2369 [7065] build: Support building glibc with -fstack-protector or -fstack-
2371 [9842] localedata: en_CA: incorrect date format
2372 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2373 before it started waiting
2374 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2375 [15765] nptl: sem_open is wrongly a cancellation point
2376 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2377 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2379 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2380 library linked with pthread
2381 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2382 "FIXME: Ingo" issue)
2383 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2384 [17252] libc: getrandom and getentropy syscall
2385 [17730] malloc: thread-local storage is sometimes improperly free()'d
2386 after being __libc_memalign()'d
2387 [18241] stdio: failed fseek on memstream does not set errno and can fail
2389 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2391 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2392 PTHREAD_PRIO_INHERIT mutex on ARM
2393 [18784] network: res_query and related function crash for special record
2394 type queries (CVE-2015-5180)
2395 [19380] math: strtod does not raise "inexact"
2396 [19387] string: Integer overflow in memchr
2397 [19390] string: Integer overflow in strncat
2398 [19398] build: linknamespace tests fail with massively parallel build
2399 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2401 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2402 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2403 [19514] libc: [PATCH] Fix spelling errors in spelling
2404 "implement"/"implementation" in several places
2405 [19582] network: Deprecate RES_USE_INET6
2406 [19673] manual: clog10 docs appear to be erroneous
2407 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2408 causes a segmentation fault
2409 [19826] libc: invalid pointer returned from __tls_get_addr with static
2411 [20016] network: resolv: Remove hooks support from the API
2412 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2414 [20033] math: [x86_64] vectorized math function don't call the __finite
2416 [20116] nptl: use after free in pthread_create
2417 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2418 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2420 [20311] nptl: please install proc_service.h
2421 [20366] libc: Compilation errors in installed headers in strict-compliance
2423 [20370] malloc: malloc: Arena free list management is still racy
2424 (incorrect fix in bug 19243)
2425 [20386] libc: assert (X = 0) does not result in GCC warning
2426 [20432] malloc: malloc: Minimize interface required for interposition
2427 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2428 in _Unwind_Backtrace (CVE-2016-6323)
2429 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2430 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2432 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2433 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2434 [20477] network: resolv: incorrect double-checked locking related to
2436 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2438 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2440 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2441 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2442 cause transition penalty
2443 [20517] math: sparcv9 missing fdiml compat symbol
2444 [20524] manual: strverscmp is inconsistent
2445 [20525] libc: <sys/quota.h> should be based on kernel headers
2446 [20539] math: GCC 7 -static -lm fails to link at -O3
2447 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2449 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2451 [20591] network: Remove obsolete DNSSEC support
2452 [20592] network: DNS resource record type classification macros in
2453 <arpa/nameser.h> are incorrect
2454 [20593] network: Update DNS RR type definitions
2455 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2456 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2458 [20629] network: libresolv: Remove support for bitstring labels
2460 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2461 assertion: "maxidx >= 2"
2462 [20660] math: [arm] Use VSQRT
2463 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2464 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2465 [20689] libc: Test for FMA should also check for AVX.
2466 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2467 [20715] math: iszero macro breaks existing code
2468 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2469 [20728] libc: powerpc: Missing TOC stub in clone
2470 [20729] build: glibc-2.24 fails to build for i486 with -Os
2471 [20750] build: Build fails with default PIE enabled gcc-6.x
2472 [20768] math: [alpha] sqrt fegetenv namespace
2473 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2475 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2476 __FLT_EVAL_METHOD__ is 2
2477 [20790] network: rpcgen buffer overrun in get_prog_declaration
2478 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2479 [20829] libc: crypt snprintf namespace
2480 [20847] libc: tst-vfork3 failure
2481 [20855] math: Default bits/mathdef.h has inappropriate float_t
2482 [20859] math: [sh4] FP_ILOGB0 invalid
2483 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2484 U+20AC), not same as GBK
2485 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2486 [20916] math: pow handling of sNaN arguments
2487 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2488 [20919] math: Bad pow (qNaN, 0) result with -lieee
2489 [20940] math: hypot sNaN handling
2490 [20947] math: fmax, fmin sNaN handling
2491 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2492 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2494 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2495 [20973] nptl: robust mutexes: Lost wake-ups
2496 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2497 [20978] nis: strlen on null pointer in nss_nisplus
2498 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2500 [21014] string: i686 memchr overflows internal pointer check
2501 [21019] libc: [mips] n32 lseek incorrect on overflow
2502 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2503 [21026] libc: [MIPS] readahead syscall is broken on n64
2504 [21028] math: Fallback fesetexceptflag should always succeed
2505 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2506 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2508 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2509 [21061] librt: [microblaze] librt lost clock_* exports
2510 [21073] libc: tunables: insecure environment variables passed to
2511 subprocesses with AT_SECURE
2512 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2516 * The minimum Linux kernel version that this version of the GNU C Library
2517 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2518 kernel version 2.6.32 or later suffices (on architectures that already
2519 required kernel versions more recent than 3.2, those requirements remain
2520 unchanged). Linux 3.2 or later kernel headers are required on all
2523 * The pap_AN locale has been deleted. This has been deprecated for a long
2524 time. It has been replaced by pap_AW & pap_CW, both of which have long
2525 been included in previous releases.
2527 * The readdir_r and readdir64_r functions have been deprecated. It is
2528 recommended to use readdir and readdir64 instead.
2530 * The type âunion waitâ has been removed. It was deprecated in the early
2531 1990s and never part of POSIX. Application code should use the int type
2532 instead of âunion waitâ.
2534 * A new NSS action is added to facilitate large distributed system
2535 administration. The action, MERGE, allows remote user stores like LDAP
2536 to be merged into local user stores like /etc/groups in order to provide
2537 easy to use, updated, and managed sets of merged credentials. The new
2538 action can be used by configuring it in /etc/nsswitch.conf:
2539 group: files [SUCCESS=merge] nis
2540 Implemented by Stephen Gallagher (Red Hat).
2542 * The deprecated __malloc_initialize_hook variable has been removed from the
2545 * The long unused localedef --old-style option has been removed. It hasn't
2546 done anything in over 16 years. Scripts using this option can safely
2549 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2550 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2551 return the next representable value in the direction of positive infinity
2552 and the nextdown functions return the next representable value in the
2553 direction of negative infinity. These are currently enabled as GNU
2556 Security related changes:
2558 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2559 could result in a stack overflow when getnetbyname was called with an
2560 overly long name. (CVE-2016-3075)
2562 * Previously, getaddrinfo copied large amounts of address data to the stack,
2563 even after the fix for CVE-2013-4458 has been applied, potentially
2564 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2565 instead. Reported by Michael Petlan. (CVE-2016-3706)
2567 * The glob function suffered from a stack-based buffer overflow when it was
2568 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2569 Reported by Alexander Cherepanov. (CVE-2016-1234)
2571 * The Sun RPC UDP client could exhaust all available stack space when
2572 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2573 alloca plugin for GCC. (CVE-2016-4429)
2575 * The IPv6 name server management code in libresolv could result in a memory
2576 leak for each thread which is created, performs a failing naming lookup,
2577 and exits. Over time, this could result in a denial of service due to
2578 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2580 The following bugs are resolved with this release:
2582 [1170] localedata: ne_NP: update Nepali locale definition file
2583 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2585 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2586 [6796] math: fdim() does not set errno on overflow
2587 [10354] libc: posix_spawn should use vfork() in more cases than presently
2588 [11213] localedata: localedata: add copyright disclaimer to locale files
2589 [12143] localedata: chr_US: new Cherokee locale
2590 [12450] localedata: sgs_LT: new locale
2591 [12676] localedata: ln_CD: new locale
2592 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2594 [13304] math: fma, fmaf, fmal produce wrong results
2595 [14259] build: --localedir arg to configure is ignored
2596 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2597 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2598 [14934] localedata: es_CL: wrong first weekday chilean locale
2599 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2601 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2603 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2604 [15368] nptl: raise() is not async-signal-safe
2605 [15479] math: ceil, floor, round and trunc raise inexact exception
2606 [15578] localedata: kk_KZ: various updates
2607 [16003] localedata: pap_AN: punt old locale
2608 [16137] localedata: iw_IL: punt old locale
2609 [16190] localedata: eo: new esperanto locale
2610 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2611 [16742] malloc: race condition: pthread_atfork() called before first
2612 malloc() results in unexpected locking behaviour/deadlocks
2613 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2615 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2616 [17565] localedata: pt_PT: wrong (work-)week start
2617 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2618 [17950] build: Build fails with -msse
2619 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2620 [18433] libc: posix_spawn does not return correctly upon failure to
2622 [18453] localedata: charmaps/IBM875: incorrect codes
2623 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2625 [18896] localedata: he_IL: improvements for currency
2626 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2627 Romanian locale data
2628 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2630 [19056] libc: Deprecate readdir_r
2631 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2633 [19198] localedata: nl_NL: small improvements for Dutch locales
2634 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2635 nameservers (CVE-2016-5417)
2636 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2638 [19400] locale: Language missing in "iso-639.def", trivial fix in
2640 [19431] malloc: Deadlock between fflush, getdelim, and fork
2641 [19505] libc: Incorrect file descriptor validity checks in
2642 posix_spawn_file_actions_add{open,close,dup2}
2643 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2644 when using RTLD_NEXT
2645 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2646 `intl/{gettextP,loadinfo}.h'
2647 [19534] libc: execle, execlp may use malloc
2648 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2649 [19573] network: res_nclose and __res_maybe_init disagree about name
2650 server initialization, breaking Hesiod
2651 [19575] localedata: Status of GB18030 tables
2652 [19581] localedata: sr_* date_fmt string contains additional newline
2653 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2655 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2656 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2657 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2658 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2660 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2662 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2664 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2665 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2666 [19633] locale: strfmon_l applies global locale to number formatting
2667 [19642] network: Memory leak in getnameinfo
2668 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2669 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2671 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2672 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2674 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2675 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2677 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2679 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2681 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2682 pointers and lengths in error-case.
2683 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2684 report errors on UTF-16 surrogates values.
2685 [19755] nscd: nscd assertion failure in gc
2686 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2687 [19759] libc: mempcpy shouldn't be inlined
2688 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2689 [19765] libc: s390 needs an optimized mempcpy
2690 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2691 NAME_MAX limit assumption (CVE-2016-1234)
2692 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2693 [19787] network: Missing and incorrect truncation checks in getnameinfo
2694 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2696 [19791] network: Assertion failure in res_query.c with un-connectable name
2698 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2699 [19822] math: libm.so install clobbers old version
2700 [19825] network: resolv: send_vc can return uninitialized data in second
2701 response to getaddrinfo
2702 [19830] network: nss_dns: should check RDATA length against buffer length
2703 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2704 confronted with A/AAAA records of invalid size
2705 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2706 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2707 [19853] stdio: Printing IBM long double in decimal with high precision is
2709 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2710 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2711 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2713 [19865] network: Assertion failure or memory leak in
2714 _nss_dns_getcanonname_r
2715 [19868] network: nss_dns: netent code does not skip over non-PTR records
2716 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2718 [19881] string: Improve x86-64 memset
2719 [19907] string: Incorrect memcpy tests
2720 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2722 [19925] libc: termios.h XCASE namespace
2723 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2724 [19929] libc: limits.h NL_NMAX namespace
2725 [19931] stdio: Memory leak in vfprintf
2726 [19957] libc: clone(CLONE_VM) access invalid parent memory
2727 [19963] localedata: en_IL: New locale
2728 [19989] stdio: stdio.h cuserid namespace
2729 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2731 [19996] locale: langinfo.h nl_langinfo_l namespace
2732 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2733 [20010] network: getaddrinfo: Stack overflow in hostent translation
2735 [20012] stdio: libio: fmemopen append mode failure
2736 [20014] stdio: stdio.h namespace for pre-threads POSIX
2737 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2738 [20023] libc: fcntl.h timespec namespace
2739 [20024] math: [x86_64] vectorized sincos trashes the stack
2740 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2741 [20041] time: sys/time.h timespec namespace
2742 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2743 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2744 [20051] libc: ttyslot in wrong header under wrong conditions
2745 [20054] libc: gethostname not declared for XPG4
2746 [20055] libc: termios.h missing tcgetsid for XPG4
2747 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2749 [20073] libc: sys/stat.h fchmod namespace
2750 [20074] libc: stdlib.h rand_r namespace
2751 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2752 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2754 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2755 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2757 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2758 [20119] libc: Wrong mask for processors level type from CPUID
2759 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2760 AS not supporting AVX512
2761 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2763 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2764 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2766 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2767 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2768 [20178] libc: posix_spawn{p} should not call exit
2769 [20191] stdio: libio: vtables hardening
2770 [20195] string: FMA4 detection requires CPUID execution with register
2772 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2773 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2775 [20212] math: acos (sNaN) returns sNaN
2776 [20213] math: asin (sNaN) returns sNaN
2777 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2778 [20218] math: [i386] asinhl (sNaN) returns sNaN
2779 [20219] math: [i386] atanhl (sNaN) returns sNaN
2780 [20222] stdio: fopencookie: Mangle function pointers
2781 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2782 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2783 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2785 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2786 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2787 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2788 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2789 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2790 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2791 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2792 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2793 [20240] math: modf (sNaN) returns sNaN
2794 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2795 [20250] math: frexp (sNaN) returns sNaN
2796 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2797 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2799 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2800 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2801 subscript is below array bounds [-Werror=array-bounds]
2802 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2803 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2805 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2806 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2808 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2809 "invalid" exceptions
2810 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2811 [20316] localedata: id_ID: Februari instead of Pebruari
2812 [20327] string: POWER8 strcasecmp returns incorrect result
2813 [20347] math: Failure: Test: j0_downward (0xap+0)
2814 [20348] libc: FAIL: misc/tst-preadvwritev64
2815 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2816 [20350] libc: There is no test for p{read,write}64
2817 [20357] math: Incorrect cos result for 1.5174239687223976
2818 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2822 * Unicode 8.0.0 Support: Character encoding, character type info, and
2823 transliteration tables are all updated to Unicode 8.0.0, using new
2824 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2825 These updates cause user visible changes, such as the fixes for bugs
2826 89, 16061, and 18568.
2828 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2829 kernel-internal CPU set size. This means that requests that change the
2830 CPU affinity which failed before (for example, an all-ones CPU mask) will
2831 now succeed. Applications that need to determine the effective CPU
2832 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2833 setting it because the kernel can adjust it (and the previous size check
2834 would not detect this in the majority of cases).
2836 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2837 the following new symbols are used: fts64_children, fts64_close,
2838 fts64_open, fts64_read and fts64_set.
2840 * getaddrinfo now detects certain invalid responses on an internal netlink
2841 socket. If such responses are received, an affected process will
2842 terminate with an error message of "Unexpected error <number> on netlink
2843 descriptor <number>" or "Unexpected netlink response of size <number> on
2844 descriptor <number>". The most likely cause for these errors is a
2845 multi-threaded application which erroneously closes and reuses the netlink
2846 file descriptor while it is used by getaddrinfo.
2848 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2849 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2850 unnecessary serialization of memory allocation requests across threads.
2851 The defect is now corrected. Users should see a substantial increase in
2852 the concurent throughput of allocation requests for applications which
2853 trigger this bug. Affected applications typically create and
2854 destroy threads frequently. (Bug 19048 was reported and analyzed by
2857 * There is now a --disable-timezone-tools configure option for disabling the
2858 building and installing of the timezone related utilities (zic, zdump, and
2859 tzselect). This is useful for people who build the timezone data and code
2860 independent of the GNU C Library.
2862 * The obsolete header <regexp.h> has been removed. Programs that require
2863 this header must be updated to use <regex.h> instead.
2865 * The obsolete functions bdflush, create_module, get_kernel_syms,
2866 query_module and uselib are no longer available to newly linked binaries;
2867 the header <sys/kdaemon.h> has been removed. These functions and header
2868 were specific to systems using the Linux kernel and could not usefully be
2869 used with the GNU C Library on systems with version 2.6 or later of the
2872 * Optimized string, wcsmbs and memory functions for IBM z13.
2873 Implemented by Stefan Liebler.
2875 * Newly linked programs that define a variable called signgam will no longer
2876 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2877 require signgam to be set by those functions must ensure that they use the
2878 variable provided by the GNU C Library and declared in <math.h>, without
2879 defining their own copy.
2881 * The minimum GCC version that can be used to build this version of the GNU
2882 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2883 still be used to compile programs using the GNU C Library.
2885 Security related changes:
2887 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2888 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2890 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2891 the pointer guard feature. It is always enabled. Previously,
2892 LD_POINTER_GUARD could be used to disable security hardening in binaries
2893 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2896 * An integer overflow in hcreate and hcreate_r could lead to an
2897 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2899 * The catopen function no longer has unbounded stack usage. Reported by
2900 Max. (CVE-2015-8779)
2902 * The nan, nanf and nanl functions no longer have unbounded stack usage
2903 depending on the length of the string passed as an argument to the
2904 functions. Reported by Joseph Myers. (CVE-2014-9761)
2906 * A stack-based buffer overflow was found in libresolv when invoked from
2907 libnss_dns, allowing specially crafted DNS responses to seize control
2908 of execution flow in the DNS client. The buffer overflow occurs in
2909 the functions send_dg (send datagram) and send_vc (send TCP) for the
2910 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2911 family. The use of AF_UNSPEC triggers the low-level resolver code to
2912 send out two parallel queries for A and AAAA. A mismanagement of the
2913 buffers used for those queries could result in the response of a query
2914 writing beyond the alloca allocated buffer created by
2915 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2916 the overflow. Thanks to the Google Security Team and Red Hat for
2917 reporting the security impact of this issue, and Robert Holiday of
2918 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2920 The following bugs are resolved with this release:
2922 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2923 [887] math: Math library function "logb" and "nextafter" inconsistent
2924 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2925 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2926 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2927 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2929 [4404] localedata: German translation of "Alarm clock" is misleading
2930 [6799] math: nextafter() and nexttoward() doen't set errno on
2931 overflow/underflow errors
2932 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2934 [10432] nis: _nss_nis_setnetgrent assertion failure
2935 [11460] libc: fts has no LFS support
2936 [12926] network: getaddrinfo()/make_request() may spin forever
2937 [13065] nptl: Race condition in pthread barriers
2938 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2939 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2941 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2942 [14912] libc: Rename non-installed bits/*.h headers
2943 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2944 [15367] math: Let gcc use __builtin_isinf
2945 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2946 [15421] math: lgamma wrongly sets signgam for ISO C
2947 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2948 FE_INVALID with argument out of range
2949 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2951 [15786] dynamic-link: ifunc resolver functions can smash function
2953 [15918] math: Unnecessary check for equality in hypotf()
2954 [16061] localedata: Review / update transliteration data
2955 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2957 [16141] time: strptime %z offset restriction
2958 [16171] math: drem should be alias of remainder
2959 [16296] math: fegetround is pure?
2960 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2961 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2963 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2964 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2966 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2967 "Exception "Inexact" set" on ppc32
2968 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2969 [16517] math: Missing underflow exception from tanf/tan/tanl
2970 [16519] math: Missing underflow exception from sinhf
2971 [16520] math: Missing underflow exception from tanhf
2972 [16521] math: Missing underflow exception from exp2
2973 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2975 [16734] stdio: fopen calls mmap to allocate its buffer
2976 [16961] math: nan function incorrect handling of bad sequences
2977 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2978 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2979 [16985] locale: localedef: confusing error message when opening output
2981 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2982 [17197] locale: Redundant shift character in iconv conversion output at
2984 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2985 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2986 [17250] dynamic-link: static linking breaks nss loading
2987 (getaddrinfo/getpwnam/etc...)
2988 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2990 [17441] math: isnan() should use __builtin_isnan() in GCC
2991 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2992 (related to lock elision)
2993 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2994 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2995 [17887] time: strptime should be able to parse "+01:00" style timezones
2996 [17905] libc: catopen() Multiple unbounded stack allocations
2998 [18084] libc: backtrace (..., 0) dumps core on x86
2999 [18086] libc: nice() sets errno to 0 on success
3000 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3001 is too large (CVE-2015-8778)
3002 [18251] dynamic-link: SONAME missing when audit modules provides path
3003 [18265] libc: add attributes for wchar string and memory functions
3004 [18370] math: csqrt missing underflows
3005 [18421] libc: [hppa] read-only segment has dynamic relocations
3006 [18472] libc: Obsolete syscall wrappers should be compat symbols
3007 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3008 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3009 [18525] localedata: Remove locale timezone information
3010 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3011 [18568] localedata: Update locale data to Unicode 8.0
3012 [18589] locale: sort-test.sh fails at random
3013 [18595] math: ctan, ctanh missing underflows
3014 [18604] libc: assert macro-expands its argument
3015 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3016 contains a vector instruction exception.
3017 [18611] math: j1, jn missing errno setting on underflow
3018 [18618] localedata: sync Chechen locale definitions with other *_RU
3020 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3021 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3022 [18665] network: In send_dg, the recvfrom function is NOT always using the
3023 buffer size of a newly created buffer (CVE-2015-7547)
3024 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3026 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3028 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3029 [18699] math: tilegx cproj() for various complex infinities does not yield
3031 [18724] libc: Harden put*ent functions against data injection
3032 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3033 [18755] build: build errors with -DNDEBUG
3034 [18757] stdio: fmemopen fails to set errno on failure
3035 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3037 [18781] libc: openat64 lacks O_LARGEFILE
3038 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3039 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3040 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3041 [18790] math: [ldbl-128ibm] tanhl inaccurate
3042 [18795] libc: stpncpy fortification misses buffer lengths that are
3043 statically too large
3044 [18796] build: build fails for --disable-mathvec
3045 [18803] math: hypot missing underflows
3046 [18820] stdio: fmemopen may leak memory on failure
3047 [18823] math: csqrt spurious underflows
3048 [18824] math: fma spurious underflows
3049 [18825] math: pow missing underflows
3050 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3051 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3052 [18870] build: sem_open.c fails to compile with missing symbol
3054 [18872] stdio: Fix memory leak in printf_positional
3055 [18873] libc: posix_fallocate overflow check ineffective
3056 [18875] math: Excess precision leads incorrect libm
3057 [18877] libc: arm: mmap offset regression
3058 [18887] libc: memory corruption when using getmntent on blank lines
3059 [18918] localedata: hu_HU: change time to HH:MM:SS format
3060 [18921] libc: Regression: extraneous stat() and fstat() performed by
3062 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3063 binaries (CVE-2015-8777)
3064 [18951] math: tgamma missing underflows
3065 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3067 [18953] localedata: lt_LT: change currency symbol to the euro
3068 [18956] math: powf inaccuracy
3069 [18961] math: [i386] exp missing underflows
3070 [18966] math: [i386] exp10 missing underflows
3071 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3072 [18969] build: multiple string test failures due to missing locale
3074 [18970] libc: Reference of pthread_setcancelstate in libc.a
3075 [18977] math: float / long double Bessel functions not in XSI POSIX
3076 [18980] math: i386 libm functions return with excess range and precision
3077 [18981] math: i386 scalb*, ldexp return with excess range and precision
3078 [18982] stdio: va_list and vprintf
3079 [18985] time: Passing out of range data to strftime() causes a segfault
3081 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3082 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3083 [19012] locale: iconv_open leaks memory on error path
3084 [19016] math: clog, clog10 inaccuracy
3085 [19018] nptl: Mangle function pointers in tls_dtor_list
3086 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3087 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3088 [19048] malloc: malloc: arena free list can become cyclic, increasing
3090 [19049] math: [powerpc] erfc incorrect zero sign
3091 [19050] math: [powerpc] log* incorrect zero sign
3092 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3093 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3094 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3095 [19074] network: Data race in _res_hconf_reorder_addrs
3096 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3097 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3098 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3100 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3102 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3103 [19086] manual: posix_fallocate64 documented argument order is wrong.
3104 [19088] math: lround, llround missing exceptions close to overflow
3106 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3107 [19095] math: dbl-64 lrint incorrect for 64-bit long
3108 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3109 [19124] dynamic-link: ld.so failed to build with older assmebler
3110 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3111 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3112 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3113 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3114 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3115 pthread_setaffinity_np
3116 [19156] math: [ldbl-128] j0l spurious underflows
3117 [19164] nptl: tst-getcpu fails with many possible CPUs
3118 [19168] math: math/test-ildoubl and math/test-ldouble failure
3119 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3120 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3122 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3123 (FE_NOMASK_ENV) do not clear SSE exceptions
3124 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3125 _int_new_arena/reused_arena
3126 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3127 [19201] math: dbl-64 remainder incorrect sign of zero result
3128 [19205] math: bits/math-finite.h conditions do not match math.h and
3130 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3131 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3132 for C99-based standards
3133 [19212] libc: features.h not -Wundef clean
3134 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3136 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3137 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3138 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3140 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3141 "inexact" exceptions
3142 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3144 [19242] libc: strtol incorrect in Turkish locales
3145 [19243] malloc: reused_arena can pick an arena on the free list, leading
3146 to an assertion failure and reference count corruption
3147 [19253] time: tzset() ineffective when temporary TZ did not include DST
3149 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3150 [19270] math: [hppa] Shared libm missing __isnanl
3151 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3152 MAP_HUGETLB and MAP_STACK defines
3153 [19313] nptl: Wrong __cpu_mask for x32
3154 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3155 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3156 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3157 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3158 [19363] time: x32: times() return value wrongly truncates/sign extends
3160 [19367] dynamic-link: Improve branch prediction on Silvermont
3161 [19369] network: Default domain name not reset by res_ninit when "search"
3162 / "domain" entry is removed from resolv.conf
3163 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3165 [19385] localedata: bg_BG: time separator should be colon, not comma
3166 [19408] libc: linux personality syscall wrapper may erroneously return an
3167 error on 32-bit architectures
3168 [19415] libc: dladdr returns wrong names on hppa
3169 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3170 IBM905, IBM907, and IBM909
3171 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3172 [19443] build: build failures with -DDEBUG
3173 [19451] build: Make check fails on test-double-vlen2
3174 [19462] libc: Glibc failed to build with -Os
3175 [19465] math: Wrong code with -Os
3176 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3178 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3180 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3181 [19486] math: S390: Math tests fail with "Exception Inexact set".
3182 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3183 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3185 [19590] math: Fail to build shared objects that use libmvec.so functions.
3189 * The following bugs are resolved with this release:
3191 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3192 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3193 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3194 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3195 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3196 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3197 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3198 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3199 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3200 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3201 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3202 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3203 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3204 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3205 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3206 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3207 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3208 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3209 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3210 18657, 18676, 18694, 18696, 18887.
3212 * Cache information can be queried via sysconf() function on s390 e.g. with
3213 _SC_LEVEL1_ICACHE_SIZE as argument.
3215 * A buffer overflow in gethostbyname_r and related functions performing DNS
3216 requests has been fixed. If the NSS functions were called with a
3217 misaligned buffer, the buffer length change due to pointer alignment was
3218 not taken into account. This could result in application crashes or,
3219 potentially arbitrary code execution, using crafted, but syntactically
3220 valid DNS responses. (CVE-2015-1781)
3222 * The time zone file parser has been made more robust against crafted time
3223 zone files, avoiding heap buffer overflows related to the processing of
3224 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3225 large time zone data files. Overly long time zone specifiers in the TZ
3226 variable no longer result in stack overflows and crashes.
3228 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3229 for LD and GD on x86 and x86-64, has been implemented. You will need
3230 binutils-2.24 or later to enable this optimization.
3232 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3233 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3234 Hat). These updates cause user visible changes, such as the fix for bug
3237 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3238 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3239 condition in some applications.
3241 * Added vector math library named libmvec with the following vectorized x86_64
3242 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3244 The library can be disabled with --disable-mathvec. Use of the functions is
3245 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3246 Shared library libmvec.so is linked in as needed when using -lm (no need to
3247 specify -lmvec explicitly for not static builds).
3248 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3250 * A new fmemopen implementation has been added with the goal of POSIX
3251 compliance. The new implementation fixes the following long-standing
3252 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3253 old implementation is still present for use be by existing binaries.
3255 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3256 releases. It has been fixed to match 2.19 and older, but binaries built
3257 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3259 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3260 Contributed by Roland McGrath (Google).
3262 * The header <regexp.h> is deprecated, and will be removed in a future
3263 release. Use of this header will trigger a deprecation warning.
3264 Application developers should update their code to use <regex.h> instead.
3266 This header was formerly part of SUS, but was deprecated in 1994 and
3267 removed from the standard in 2001. Also, the glibc implementation
3268 leaks memory. See BZ#18681 for more details.
3272 * The following bugs are resolved with this release:
3274 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3275 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3276 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3277 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3278 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3279 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3280 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3281 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3282 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3283 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3286 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3287 too little memory for the to-be-scanned arguments and overflow the
3288 allocated buffer. The implementation now correctly computes the required
3289 buffer size when using malloc, and switches to malloc from alloca as
3292 * A new semaphore algorithm has been implemented in generic C code for all
3293 machines. Previous custom assembly implementations of semaphore were
3294 difficult to reason about or ensure that they were safe. The new version
3295 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3296 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3297 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3299 * Port to Altera Nios II has been contributed by Mentor Graphics.
3301 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3302 implementations for powerpc64/powerpc64le.
3303 Implemented by Adhemerval Zanella (IBM).
3305 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3306 and powerpc64le. This may improve lock scaling of existing programs on
3307 HTM capable systems. The lock elision code is only enabled with
3308 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3309 powerpc will issue a transaction abort on every syscall to avoid side
3310 effects being visible outside transactions.
3312 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3313 AArch64. Contributed by ARM Ltd.
3315 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3317 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3318 under certain input conditions resulting in the execution of a shell for
3319 command substitution when the application did not request it. The
3320 implementation now checks WRDE_NOCMD immediately before executing the
3321 shell and returns the error WRDE_CMDSUB as expected.
3323 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3324 processing format strings with a large number of format specifiers.
3326 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3327 infinite loop if the DNS response contained a PTR record of an unexpected
3330 * The minimum GCC version that can be used to build this version of the GNU
3331 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3332 still be used to compile programs using the GNU C Library.
3334 * The GNU C Library is now built with -Werror by default. This can be
3335 disabled by configuring with --disable-werror.
3337 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3339 * The obsolete sigvec function has been removed. This was the original
3340 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3341 programs have been using instead for about 25 years. Of course, ABI
3342 compatibility for old binaries using sigvec remains intact.
3344 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3345 with newer versions of bison.
3347 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3348 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3349 registers overlay two consecutive single-precision registers. MIPS32R2
3350 introduced a new FPU mode (FR=1) where double-precision registers extend the
3351 corresponding single-precision registers which is incompatible with the
3352 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3353 require the use of FR=1 making a transition necessary. New o32 ABI
3354 extensions enable users to migrate over time from the original o32 ABI
3355 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3356 tracks the ABI of any loaded object and verifies that new objects are
3357 compatible. Mode transitions will also be requested as required and
3358 unsupportable objects will be rejected. The ABI checks include both soft and
3359 hard float ABIs for o32, n32 and n64.
3361 GCC 5 with GNU binutils 2.25 onwards:
3362 It is strongly recommended that all o32 system libraries are built using the
3363 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3364 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3365 compiler using --with-fp-32=xx to set this by default.
3369 * The following bugs are resolved with this release:
3371 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3372 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3373 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3374 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3375 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3376 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3377 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3378 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3379 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3380 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3381 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3382 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3383 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3384 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3385 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3387 * Reverted change of ABI data structures for s390 and s390x:
3388 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3389 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3390 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3391 are preserved pointing straight to the same implementation as the old ones.
3392 Given that, new callers will simply provide a too-big buffer to these
3393 functions. Any applications/libraries out there that embed jmp_buf or
3394 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3395 against 2.19 headers will have to rebuilt again. This is necessary in any
3396 case to revert the breakage in their ABI caused by the glibc change.
3398 * Support for file description locks is added to systems running the
3399 Linux kernel. The standard file locking interfaces are extended to
3400 operate on file descriptions, not file descriptors, via the use of
3401 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3402 are associated with an open file instead of a process.
3404 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3406 * The minimum Linux kernel version that this version of the GNU C Library
3407 can be used with is 2.6.32.
3409 * Running the testsuite no longer terminates as soon as a test fails.
3410 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3411 with PASS or FAIL lines for individual tests. A summary of the results is
3412 printed, including a list of failing lists, and "make check" exits with
3413 error status if there were any unexpected failures. "make check
3414 stop-on-test-failure=y" may be used to keep the old behavior.
3416 * The am33 port, which had not worked for several years, has been removed
3419 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3420 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3421 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3422 conflicted with POSIX (support for which was removed in 2.19), the
3423 interfaces those macros enabled remain available when compiling with
3424 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3425 test macros defined.
3427 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3429 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3430 This may improve lock scaling of existing programs on TX capable systems.
3431 The lock elision code is only built with --enable-lock-elision=yes and
3432 then requires a GCC version supporting the TX builtins. With lock elision
3433 default mutexes are elided via __builtin_tbegin, if the cpu supports
3434 transactions. By default lock elision is not enabled and the elision code
3437 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3438 copy the path argument. This allowed programs to cause posix_spawn to
3439 deference a dangling pointer, or use an unexpected pathname argument if
3440 the string was modified after the posix_spawn_file_actions_addopen
3443 * All supported architectures now use the main glibc sysdeps directory
3444 instead of some being in a separate "ports" directory (which was
3445 distributed separately before glibc 2.17).
3447 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3448 On configurations that support it (all Linux configurations), it's now
3449 used regardless of the --enable-add-ons switch to configure. It is no
3450 longer possible to build such configurations without pthreads support.
3452 * Locale names, including those obtained from environment variables (LANG
3453 and the LC_* variables), are more tightly checked for proper syntax.
3454 setlocale will now fail (with EINVAL) for locale names that are overly
3455 long, contain slashes without starting with a slash, or contain ".." path
3456 components. (CVE-2014-0475) Previously, some valid locale names were
3457 silently replaced with the "C" locale when running in AT_SECURE mode
3458 (e.g., in a SUID program). This is no longer necessary because of the
3461 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3462 with application code using Intel MPX instructions. (With all previous
3463 versions, the MPX register state could be clobbered when making calls
3464 into or out of a shared library.) Note that while the new dynamic
3465 linker is compatible with all known x86 hardware whether or not it
3466 supports Intel MPX, some x86 instruction-set emulators might fail to
3467 handle the new instruction encodings. This is known to affect Valgrind
3468 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3469 release), and might affect other tools that do instruction emulation.
3471 * Support for loadable gconv transliteration modules has been removed.
3472 The support for transliteration modules has been non-functional for
3473 over a decade, and the removal is prompted by security defects. The
3474 normal gconv conversion modules are still supported. Transliteration
3475 with //TRANSLIT is still possible, and the //IGNORE specifier
3476 continues to be supported. (CVE-2014-5119)
3478 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3479 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3480 resulting a denial-of-service security vulnerability in applications which
3481 use functions related to iconv. (CVE-2014-6040)
3485 * The following bugs are resolved with this release:
3487 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3488 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3489 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3490 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3491 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3492 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3493 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3494 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3495 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3496 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3497 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3498 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3499 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3500 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3501 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3502 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3503 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3504 16431, 16453, 16474, 16506, 16510, 16529
3506 * Slovenian translations for glibc messages have been contributed by the
3507 Translation Project's Slovenian team of translators.
3509 * The public headers no longer use __unused nor __block. This change is to
3510 support compiling programs that are derived from BSD sources and use
3511 __unused internally, and to support compiling with Clang's -fblock
3512 extension which uses __block.
3514 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3515 large collation sequences to optimize multiple passes. This cache
3516 computation may overflow for large collation sequences and may cause a
3517 stack or buffer overflow. This is now fixed to use a slower algorithm
3518 which does not use a cache if there is an integer overflow.
3520 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3521 rules for large collation sequences to optimize multiple passes and falls
3522 back to alloca if malloc fails, resulting in a possible stack overflow.
3523 The implementation now falls back to an uncached collation sequence lookup
3526 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3527 initialized for static applications resulting in the security feature
3528 being disabled. The pointer guard is now correctly initialized to a
3529 random value for static applications. Existing static applications need
3530 to be recompiled to take advantage of the fix (bug 15754).
3532 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3533 to the d_name member of struct dirent, or omit the terminating NUL
3534 character. (Bugzilla #14699).
3536 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3537 aligned_alloc functions could allocate too few bytes or corrupt the
3538 heap when passed very large allocation size values (Bugzilla #15855,
3541 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3542 for AF_INET6 has been fixed (Bugzilla #16072).
3544 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3545 pap_CW, quz_PE, the_NP.
3547 * Substantially revised locales: gd_GB, ht_HT
3549 * The LC_ADDRESS field was updated to support country_car for almost all
3552 * ISO 1427 definitions were updated.
3554 * ISO 3166 definitions were updated.
3556 * The localedef utility now supports --big-endian and --little-endian
3557 command-line options to generate locales for a different system from that
3558 for which the C library was built.
3560 * Binary locale files now only depend on the endianness of the system for
3561 which they are generated and not on other properties of that system. As a
3562 consequence, binary files generated with new localedef may be incompatible
3563 with old versions of the GNU C Library, and binary files generated with
3564 old localedef may be incompatible with this version of the GNU C Library,
3565 in the following circumstances:
3567 + Locale files may be incompatible on m68k systems.
3569 + Locale archive files (but not separate files for individual locales) may
3570 be incompatible on systems where plain "char" is signed.
3572 * The configure option --disable-versioning has been removed. Builds with
3573 --disable-versioning had not worked for several years.
3575 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3576 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3578 * SystemTap probes for malloc have been introduced.
3580 * SystemTap probes for slow multiple precision fallback paths of
3581 transcendental functions have been introduced.
3583 * Support for powerpc64le has been added.
3585 * The soft-float powerpc port now supports e500 processors.
3587 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3589 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3590 set of header declarations that are enabled by default, even when other
3591 feature test macros or compiler options such as -std=c99 would otherwise
3592 disable some of those declarations.
3594 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3595 conflict with POSIX. The libbsd-compat library (which was a dummy library
3596 that did nothing) has also been removed.
3598 * Preliminary documentation about Multi-Thread, Async-Signal and
3599 Async-Cancel Safety has been added.
3601 * Change of ABI data structures for s390 and s390x:
3602 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3603 allow for future hardware extensions. All library functions that accept or
3604 return these structures were versioned in order to provide backwards
3605 compatibility with existing code. However, not all cases can be handled
3606 with interface versioning. If an application embeds either structure into
3607 another structure and that structure is passed to another compilation unit
3608 which expects the newer larger-sized object then any access to the new
3609 fields will result in undefined behaviour. Similarly any access to fields
3610 that were moved by the enlarging of the structures will cause undefined
3611 behaviour. To fix the undefined behaviour all objects that are part of the
3612 final in-memory image must agree on the size of structures, and this may
3613 require recompilation.
3617 * The following bugs are resolved with this release:
3619 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3620 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3621 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3622 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3623 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3624 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3625 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3626 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3627 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3628 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3629 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3630 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3631 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3634 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3635 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3636 Distributions can re-enable building and using pt_chown via the new configure
3637 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3638 considerable security risks and should only be used if the distribution
3639 understands and accepts the risks.
3641 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3644 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3645 fixed (Bugzilla #15330).
3647 * Add support for calling C++11 thread_local object destructors on thread
3648 and program exit. This needs compiler support for offloading C++11
3649 destructor calls to glibc.
3651 * Improved worst case performance of libm functions with double inputs and
3654 * Support for priority inherited mutexes in pthread condition variables on
3655 non-x86 architectures.
3657 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3659 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3661 * Optimized string functions for ARM. Implemented by Will Newton and
3664 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3666 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3669 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3670 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3672 * Added a benchmark framework to track performance of functions in glibc.
3674 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3675 It is based on draft TS 18661 and currently enabled as a GNU extension.
3677 * On Linux, the clock function now uses the clock_gettime system call
3678 for improved precision, rather than old times system call.
3680 * Added support for version-3 tz format files. This is needed when using
3681 the tz database release 2013e or later, and affects a few unusual cases --
3682 currently only TZ='America/Godthab' for time stamps after 2037.
3684 * Added new API functions pthread_getattr_default_np and
3685 pthread_setattr_default_np to get and set the default pthread
3686 attributes of a process.
3688 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3689 This may improve lock scaling of existing programs on TSX capable systems.
3690 When the --enable-lock-elision=yes parameter is specified at configure
3691 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3694 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3695 availability). Implemented by Ryan S. Arnold.
3697 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3701 * The following bugs are resolved with this release:
3703 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3704 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3705 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3706 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3707 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3708 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3709 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3710 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3711 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3712 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3713 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3714 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3715 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3716 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3717 14879, 14889, 14893, 14898, 14914.
3719 * Optimization of memcpy for MIPS.
3721 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3722 EMFILE has been fixed (Bugzilla #14889).
3724 * The add-on ports collection is now distributed in the "ports" subdirectory
3725 of the main GNU C Library distribution, rather than separately.
3727 * Port to ARM AArch64 contributed by Linaro.
3729 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3730 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3732 Implemented by Andreas Krebbel.
3734 * The new function secure_getenv allows secure access to the environment,
3735 returning NULL if running in a SUID/SGID process. This function replaces
3736 the internal function __secure_getenv.
3738 * SystemTap static probes have been added into the dynamic linker.
3739 Implemented by Gary Benson.
3741 * Optimizations of string functions strstr, strcasestr and memmem.
3742 Implemented by Maxim Kuvyrkov.
3744 * The minimum Linux kernel version that this version of the GNU C Library
3745 can be used with is 2.6.16.
3747 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3748 powerpc POWER7. Implemented by Will Schmidt.
3750 * New configure option --disable-nscd builds the C library such that it
3751 never attempts to contact the Name Service Caching Daemon (nscd).
3752 New configure option --disable-build-nscd avoids building nscd itself;
3753 this is the default if --disable-nscd is used.
3755 * Improved support for cross-compilation, including cross-testing and
3756 bootstrap builds without a previously built glibc.
3758 * Several testsuite tests are now able to test multiple IFUNC variants of an
3759 interface, rather than just testing the one that would be chooen by
3762 * New configure options --with-bugurl and --with-pkgversion, for
3763 distributors to use to embed their bug-reporting and package version
3764 information in --help and --version output.
3766 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3767 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3768 allows creation of chroots without the procfs mounted on /proc.
3770 * The `crypt' function now fails if passed salt bytes that violate the
3771 specification for those values. On Linux, the `crypt' function will
3772 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3773 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3774 when the mode is enabled.
3776 * The `clock_*' suite of functions (declared in <time.h>) is now available
3777 directly in the main C library. Previously it was necessary to link with
3778 -lrt to use these functions. This change has the effect that a
3779 single-threaded program that uses a function such as `clock_gettime' (and
3780 is not linked with -lrt) will no longer implicitly load the pthreads
3781 library at runtime and so will not suffer the overheads associated with
3782 multi-thread support in other code such as the C++ runtime library.
3784 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3789 * The following bugs are resolved with this release:
3791 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3792 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3793 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3794 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3795 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3796 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3797 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3798 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3799 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3800 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3801 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3802 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3803 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3804 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3805 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3806 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3807 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3808 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3809 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3810 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3811 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3812 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3815 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3816 configuring glibc with:
3817 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3818 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3819 Implemented by H.J. Lu.
3823 + define static_assert
3825 + do not declare gets
3827 + declare at_quick_exit and quick_exit also for ISO C11
3829 + aligned_alloc. NB: The code is deliberately allows the size parameter
3830 to not be a multiple of the alignment. This is a moronic requirement
3831 in the standard but it is only a requirement on the caller, not the
3834 + timespec_get added
3836 + uchar.h support added
3838 + CMPLX, CMPLXF, CMPLXL added
3840 Implemented by Ulrich Drepper.
3842 * Support for the IA-64 has been moved to ports.
3844 * Remove support for anything but ELF binary format
3846 * Checking versions of poll, ppoll added.
3847 Implemented by Ulrich Drepper.
3849 * More generic and 64-bit performance optimizations to math functions.
3850 Implemented by Ulrich Drepper.
3852 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3853 headers and functions available at compile time as they were before
3854 version 2.14. This option will be removed at some time in the future
3855 after the TI-RPC library becomes fully sufficient for the needs of
3856 existing applications.
3858 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3859 Note that glibc is not expected to work with any Linux kernel version
3862 * New header <sys/auxv.h> and function getauxval allowing easy access to
3863 the AT_* key-value pairs passed from the Linux kernel. The header also
3864 defines the HWCAP_* bits associated with the AT_HWCAP key.
3866 * New locales: mag_IN
3868 * New configure option --enable-systemtap builds SystemTap static probes
3869 into libc for setjmp and longjmp and into libpthread for various operations.
3870 So far the setjmp/longjmp probes and some of the libpthread probes are
3871 provided only for i*86 and x86_64.
3872 Implemented by Roland McGrath and Rayson Ho.
3874 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3876 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3879 * More optimized functions for SPARC. Implemented by David S. Miller.
3881 * Improved support for cross-compilation, especially bootstrap builds
3882 without a previously built glibc.
3884 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3885 Chris Metcalf from Tilera.
3887 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3888 now supported for ARM processors.
3890 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3891 as the name of the dynamic linker, to distinguish it from the
3892 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3894 * Support for CRIS has been removed from ports.
3896 * A new class of installed header has been documented for low-level
3897 platform-specific functionality. PowerPC added the first instance with a
3898 function to provide time base register access. Contributed by Tulio
3899 Magno Quites Machado Filho.
3901 * ix86 configurations now install header files that are consistent with
3902 what x86-64 configurations install. These same header files can be used
3903 for -m32, -m64, or -mx32 builds.
3904 Contributed by H.J. Lu.
3906 * Math library bug fixes. A thorough audit of all open math library bugs was
3907 conducted by Joseph Myers. Significant progress was made on many math
3908 library bugs resulting in more accurate exceptions and function results.
3909 Many thanks to all those that contributed including Andreas Jaeger for his
3910 patch review and work on the x87 trigonometric instruction issues.
3912 * Timezone data is no longer installed. Timezone-related binaries and scripts
3913 will continue to be installed. Users should obtain their timezone data from
3914 their distribution provider or from the tzdata package at
3915 <ftp://munnari.oz.au/pub/>.
3919 * The following bugs are resolved with this release:
3921 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3922 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3923 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3924 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3925 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3926 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3927 13484, 13506, 13515, 13523, 13524, 13538, 13540
3929 * New program pldd to list loaded object of a process
3930 Implemented by Ulrich Drepper.
3932 * Add nss_db support back to glibc. No more dependency on Berkeley db
3933 and support for initgroups lookups.
3934 Implemented by Ulrich Drepper.
3936 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3937 Contributed by HJ Lu.
3939 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3940 Contributed by HJ Lu.
3942 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3943 on x86-32 and x86-64.
3944 Contributed by Liubov Dmitrieva.
3946 * Optimized strchr and strrchr for SSE on x86-32.
3947 Contributed by Liubov Dmitrieva.
3949 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3950 for x86-64 and x86-32.
3951 Contributed by Liubov Dmitrieva.
3953 * New interfaces: scandirat, scandirat64
3954 Implemented by Ulrich Drepper.
3956 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3957 Implemented by Ulrich Drepper.
3959 * nscd now also caches the netgroup database.
3960 Implemented by Ulrich Drepper.
3962 * Integrate libm with gcc's -ffinite-math-only option.
3963 Implemented by Ulrich Drepper.
3965 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3966 to math functions. Implemented by Ulrich Drepper.
3968 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3969 Implemented by Ulrich Drepper.
3971 * New Linux interfaces: process_vm_readv, process_vm_writev
3973 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3974 Implemented by Ulrich Drepper.
3976 * Optimized nearbyint and strcasecmp for PPC.
3977 Implemented by Adhemerval Zanella.
3979 * New locales: bho_IN, unm_US, es_CU, ta_LK
3983 * The following bugs are resolved with this release:
3985 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3986 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3987 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3988 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3989 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3990 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3991 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3992 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3993 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3994 12795, 12811, 12813, 12814, 12841
3996 * The RPC implementation in libc is obsoleted. Old programs keep working
3997 but new programs cannot be linked with the routines in libc anymore.
3998 Programs in need of RPC functionality must be linked against TI-RPC.
3999 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4001 Visible changes of this change include (obviously) the inability to link
4002 programs using RPC functions without referencing the TI-RPC library and the
4003 removal of the RPC headers from the glibc headers.
4004 Implemented by Ulrich Drepper.
4006 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4007 syncfs, setns, sendmmsg
4009 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4010 yue_HK, lij_IT, mhr_RU
4012 * New encodings: CP770, CP771, CP772, CP773, CP774
4014 * New program sotruss to trace calls through PLTs
4015 Implemented by Ulrich Drepper.
4017 * The malloc hook implementation is marked deprecated and will be removed
4018 from the default implementation in the next version. The design never
4019 worked ever since the introduction of threads. Even programs which do
4020 not create threads themselves can use multiple threads created internally.
4024 * The following bugs are resolved with this release:
4026 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4027 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4028 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4029 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4032 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4034 * POWER7 optimizations: memset, memcmp, strncmp
4036 * New optimized string functions for x86-64: strnlen (SSE2),
4037 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4038 Implemented by Ulrich Drepper.
4042 * The following bugs are resolved with this release:
4044 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4045 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4046 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4047 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4048 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4049 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4050 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4051 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4053 * New interfaces: pthread_getname_np, pthread_setname_np
4055 * New Linux interface: recvmmsg
4057 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4059 * The dynamic linker now recognizes supported ABI versions from the
4060 EI_ABIVERSION field in the ELF header.
4061 Implemented by Ulrich Drepper.
4063 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4064 will not be used to fill in password fields in the passwd.byname replies.
4065 Instead it is used to synthesize the shadow.byname table, should it be
4066 missing. This is a useful mode in some installations involving Solaris.
4067 Implemented by Ulrich Drepper.
4069 * New locales: kok_IN, sq_MK, cv_RU
4073 * The following bugs are resolved with this release:
4075 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4076 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4077 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4078 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4079 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4080 10789, 10817, 10823, 10840, 10847
4082 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4084 Implemented by Ulrich Drepper.
4086 * Checking version of longjmp added that fails if an uninitialized stack
4087 frame would be created. Implemented by Ulrich Drepper.
4089 * STT_GNU_IFUNC is now supported in static executables.
4090 Implemented by H.J. Lu.
4092 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4094 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4095 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4096 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4097 Contributed by H.J. Lu.
4099 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4100 Implemented by Ulrich Drepper.
4102 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4104 Contributed by H.J. Lu.
4106 * Support for fma instruction in AVX on x86-64.
4107 Implemented by H.J. Lu and Ulrich Drepper.
4109 * AVX support in x86-64 auditing support in ld.so.
4110 Implemented by H.J. Lu.
4112 * STB_GNU_UNIQUE support added.
4113 Implemented by Ulrich Drepper.
4115 * Implement second fallback mode for optimized DNS lookup for even more
4116 broken environments. If two requests from the same port are not
4117 handled correctly close the socket and open a new one before sending
4118 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4119 can be used to select this mode right away, instead of rediscovering the
4120 necessity is every process again.
4121 Implemented by Ulrich Drepper.
4123 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4124 Implemented by Adam Tkac.
4126 * Optimized iconv conversions for S390x.
4127 Implemented by Andreas Krebbel.
4129 * Using condvars with PI mutexes is now more efficient due to kernel
4130 support for requeueing to PI futexes. NPTL support added for x86-64.
4131 Implemented by Ulrich Drepper.
4133 * New locales: ps_AF, my_MM
4137 * The following bugs are resolved with this release:
4139 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4140 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4141 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4142 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4143 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4145 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4146 Implemented by Ulrich Drepper.
4148 * New Linux interfaces: accept4, fallocate, fallocate64.
4149 Implemented by Ulrich Drepper.
4151 * Correct declarations of string function when used in C++ code. This
4152 could lead to compile errors for invalid C++ code.
4154 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4157 * New POSIX 2008 interface: psiginfo
4158 Implemented by Ulrich Drepper.
4160 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4161 Implemented by Ulrich Drepper.
4163 * Support for selecting between multiple function definitions at runtime
4164 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4166 * The libcrypt library can now use the hash function implementations in
4167 NSS. Implemented by Ulrich Drepper.
4169 * The malloc implementation can be compiled to be less memory efficient
4170 but higher performing in multi-threaded programs.
4171 Implemented by Ulrich Drepper.
4173 * New locales: nan_TW@latin, ks_IN
4175 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4176 Implemented by Ulrich Drepper.
4178 * Extended printf hook support. It is possible to use user-defined types
4179 and extend existing format specifiers.
4180 Implemented by Ulrich Drepper.
4182 * Handling for group shadow files has been added.
4183 Implemented by Ulrich Drepper.
4185 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4186 servers (the case, e.g., for some people using the built-in DNS
4187 server in ADSL modems/routers). There is a once-per-process timeout
4188 in case of a broken server. To avoid it, users can run nscd or put
4189 'options single-request' in /etc/resolv.conf.
4190 Implemented by Ulrich Drepper.
4194 * The following bugs are resolved with this release:
4196 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4197 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4198 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4199 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4200 6968, 6974, 6980, 6995, 7008, 7009, 7029
4202 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4203 up at the same time. Implemented by Ulrich Drepper.
4205 * TLS descriptors for LD and GD on x86 and x86-64.
4206 Implemented by Alexandre Oliva.
4208 * getaddrinfo now handles DCCP and UDPlite.
4209 Implemented by Ulrich Drepper.
4211 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4212 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4213 Implemented by Ulrich Drepper.
4215 * New implementation of memmem, strstr, and strcasestr which is O(n).
4216 Implemented by Eric Blake.
4218 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4220 * Implement "e" option for popen to open file descriptor with the
4221 close-on-exec flag set. Implemented by Ulrich Drepper.
4223 * Implement "b" mode for fmemopen. In this mode writes writes don't
4224 implicitly add a NUL byte and seeks from the end of the buffer really
4225 use the buffer end, not the string length as the basis.
4226 Implemented by Ulrich Drepper.
4228 * Many functions, exported and internal, now atomically set the close-on-exec
4229 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4231 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4233 Implemented by Pravin Satpute.
4235 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4239 * The following bugs are resolved with this release:
4241 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4242 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4243 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4244 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4245 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4246 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4247 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4249 * New locales: bo_CN, bo_IN, shs_CA.
4251 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4253 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4254 Implemented by Pravin Satpute.
4256 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4258 * nscd caches now all timeouts for DNS entries
4259 Implemented by Ulrich Drepper.
4261 * nscd is more efficient and wakes up less often.
4262 Implemented by Ulrich Drepper.
4264 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4265 vdprintf, and obstack_vprintf.
4266 Implemented by Jakub Jelinek.
4268 * Faster memset for x86-64.
4269 Implemented by Harsha Jagasia and H.J. Lu.
4271 * Faster memcpy on x86.
4272 Implemented by Ulrich Drepper.
4274 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4275 Implemented by Ulrich Drepper.
4277 * Faster sqrt and sqrtf implemention for some PPC variants.
4278 Implemented by Steven Munroe.
4282 * The following bugs are resolved with this release:
4284 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4285 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4286 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4287 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4288 5071, 5103, 5104, 5112, 5113, 5184, 5186
4290 * More checking functions: fread, fread_unlocked, open*, mq_open.
4291 Implemented by Jakub Jelinek and Ulrich Drepper.
4293 * Extend fortification to C++. Implemented by Jakub Jelinek.
4295 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4296 by not recognizing 'a' as a modifier when those specs are requested.
4297 Implemented by Jakub Jelinek.
4299 * PPC optimizations to math and string functions.
4300 Implemented by Steven Munroe.
4302 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4303 options to be passed. Implemented by Ulrich Drepper.
4305 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4307 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4308 Implemented by Ulrich Drepper.
4310 * Handle private futexes in the NPTL implementation.
4311 Implemented by Jakub Jelinek and Ulrich Drepper.
4313 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4314 Implemented by Roland McGrath and Ulrich Drepper.
4316 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4318 * SHA-256 and SHA-512 based password encryption.
4319 Implemented by Ulrich Drepper.
4321 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4322 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4325 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4326 Implemented by Ulrich Drepper.
4330 * The following bugs are resolved with this release:
4332 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4333 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4334 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4335 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4336 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4337 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4338 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4341 * New Linux interfaces: epoll_pwait, sched_getcpu.
4343 * New generic interfaces: strerror_l.
4345 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4349 * The following bugs are resolved with this release:
4351 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4352 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4353 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4354 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4355 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4356 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4357 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4358 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4359 3225, 3251, 3252, 3253, 3273
4361 * For Linux, the sorting of addresses returned by getaddrinfo now also
4362 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4363 Implemented by Ulrich Drepper.
4365 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4366 Implemented by Ulrich Drepper.
4368 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4370 * New iconv module for MIK. Contributed by Alexander Shopov.
4372 * For sites with broken group and/or passwd database, the auto-propagate
4373 option of nscd can prevent creating ID lookup entries from the results
4374 of a name lookup and vice versa. This usually is no problem but some
4375 site might have problems with the default behavior.
4376 Implemented by Ulrich Drepper.
4378 * Iterating over entire database in NIS can be slow. With the
4379 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4380 to trade time for memory. The entire database will be read at once.
4381 Implemented by Ulrich Drepper.
4383 * The interfaces introduced in RFC 3542 have been implemented by
4386 * Support for the new ELF hash table format was added by Ulrich Drepper.
4388 * Support for priority inheritance mutexes added by Jakub Jelinek and
4391 * Support for priority protected mutexes added by Jakub Jelinek.
4393 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4394 or_IN, csb_PL, fy_NL, sr_ME.
4398 * More overflow detection functions.
4400 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4401 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4403 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4404 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4405 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4406 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4407 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4408 by Masahide Washizawa.
4410 * It is now possible to install audit libraries for the dynamic linker using
4411 LD_AUDIT. Implemented by Ulrich Drepper.
4413 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4414 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4415 For a libc and libpthread that works well on Linux 2.4 kernels, we
4416 recommend using the stable 2.3 branch.
4418 * The new function open_wmemstream acts like open_memstream,
4419 but uses a wchar_t wide character buffer.
4421 * The new function ppoll is an improved version of poll, similar to pselect.
4423 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4424 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4425 renameat, unlinkat, linkat, symlinkat, readlinkat.
4427 * New Linux kernel system calls: unshare,
4428 inotify_init, inotify_add_watch, inotify_rm_watch.
4430 * The euidaccess function is now also known by the alias eaccess,
4431 for compatibility with some other systems.
4433 * Timezone data updated to 2006b version.
4437 * The following bugs are resolved with this release:
4439 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4440 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4441 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4442 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4443 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4444 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4446 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4448 * As of this release, GCC 4 can be used to compile the C Library.
4450 * Timezone data updated to 2005m version.
4454 * The following bugs are resolved with this release:
4456 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4457 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4458 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4459 777, 787, 821, 822, 823, 825
4461 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4465 * Support for RFC 3678. Real implementations exist only for Linux so far.
4466 Implemented by Ulrich Drepper.
4468 * nscd can now cache entries persistently. Expiring entries are reloaded.
4469 For speedups the cache can be shared in memory with client processes.
4470 Implemented by Ulrich Drepper.
4472 * nscd can now perform SELinux checks.
4473 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4475 * getaddrinfo queries are now cached. Canonical name lookup is performed
4477 Implemented by Ulrich Drepper.
4479 * The nothrow function attribute is used when headers are used by gcc when
4480 compiling C code. This can avoid significant amounts of exception
4483 * The malloc functions perform more error checking and are stricter when
4484 it comes to reacting on errors. The default action is to terminate
4485 the process after showing an error message. Implemented by Ulrich Drepper.
4487 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4488 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4490 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4491 namespaces using the new function dlmopen(). This feature is of course,
4492 like most other dynamic loading functionality, not available in statically
4493 linked applications. Implemented by Ulrich Drepper.
4495 * Low-overhead boundary checking variants of string and some stdio functions
4496 were added. These are to be used in conjunction with a gcc patch by
4497 Jakub Jelinek which adds calls to these functions if possible.
4498 Implemented by Jakub Jelinek and Ulrich Drepper.
4500 * Old code for several operating systems and machine architectures that
4501 have not been in working condition in a long time have been removed from
4502 the main source tree maintained by the GNU C Library's maintainers.
4503 These files are now reside in the separate `ports' source module
4504 that is usable as an add-on when building the library.
4508 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4509 interrogate the dynamic linker, compatible with the Solaris interface.
4511 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4512 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4514 * getifaddrs now uses the netlink interface on Linux to get its information.
4515 Implemented by Thorsten Kukuk.
4517 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4518 Implemented by Ulrich Drepper.
4520 * support for non-executable stacks on x86 has been added. Changes mostly
4523 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4526 * getaddrinfo now performs destination address selection according to
4531 * Thread-safe interfaces for many functions that access locale data
4532 were added in version 2.3, but these features were omitted from NEWS.
4533 Many functions have variants with an `_l' suffix that take a `locale_t'
4534 object as a parameter rather than consulting the current locale.
4535 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4536 create and maintain `locale_t' objects. Additionally, the new function
4537 `uselocale' sets "the current locale" (as used by functions not so
4538 parameterized) set for an individual thread. These features were added
4539 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4541 * The functions getresuid, getresgid, setresuid, and setresgid, which
4542 have long been available on Linux, are now declared in <unistd.h>
4543 and are now also available on the Hurd.
4545 * ELF thread-local storage support (TLS) now works on x86-64.
4547 * The new dynamic string token $LIB is expanded in shared library names.
4548 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4550 * Aldy Hernandez contributed complete software floating point support for
4551 PowerPC machines with no FPU.
4553 * fexecve is implemented on Linux.
4555 * The `btowc' function should work at least twice as fast due to
4556 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4558 * With approriate thread add-ons cancelable functions are now implemented
4559 in libc.so as well. No need to call the function in libpthread. This
4560 change allowed to finally disable the incorrect and expensive handling
4561 of weak definition in ld.so.
4563 * Yet more PLT entries in libc.so have been removed. We finally arrived
4564 at the bare minimum. Startup times improved appropriately.
4566 * Support for the new Linux/x86 system call interface was added. The
4567 AT_SYSINFO auxiliary vector entry is recognized and handled.
4571 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4574 * iconv (the program and the interface) now accepts empty names (excluding
4575 options like //TRANSLIT) to mean "use charset of current locale".
4577 * localedef can now transliterate characters in strings which are not in
4578 the provided charmap. The information from the input locale is used.
4580 * Prelinking support was added for ELF targets. This requires additional
4581 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4583 * Read-only stdio streams now use mmap to speed up operation by eliminating
4584 copying and buffer underflows. To use add 'm' to the mode string of
4585 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4587 * The malloc functions were completely rewritten by Wolfram Gloger based
4588 on Doug Lea's malloc-2.7.0.c.
4590 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4591 implementation of regex.
4593 * Bruno Haible upgraded the iconv and locale implementation to support
4596 * Contents of the LC_* and LANG environment variables in the CEN style are
4597 not recognized anymore. It never was used. Change by Ulrich Drepper.
4599 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4600 thread-local storage (TLS) ABI on some platforms.
4601 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4603 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4604 EUC-JISX0213, and TSCII.
4606 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4607 BSD-compatible interface for getting all network interface addresses.
4608 Implementation for IPv4 by Roland McGrath.
4610 * Loading of locale data is faster due to the introduction of a locale
4611 archive. Implemented by Roland McGrath and Ulrich Drepper.
4613 * Startup times are significantly reduced by not using exported functions
4614 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4617 * Steven Munroe contributed a port to PowerPC64/Linux.
4621 * The Hurd now uses the GNU libio implementation of stdio rather than the
4622 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4624 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4625 with the same behavior as the Linux system call of the same name.
4629 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4630 128-bit long double format.
4632 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4633 IBM1161, and IBM1162 charsets.
4635 * Andreas Jaeger contributed a port to x86-64/Linux.
4637 * Peter Bruin contributed a port to PowerPC/Hurd.
4639 * libc functions using I/O streams now can handle wide-oriented streams
4642 * optimizations in the dynamic linker. Binaries created by recent binutils
4643 versions start up quicker due to reduced time spent on relocations.
4645 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4649 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4650 asinh, atanh, j0 for the 128-bit long double format.
4652 * Bruno Haible updated all the code handling Unicode in some form to
4653 support Unicode 3.1.
4655 * Speed of regex for single-byte locales is back to previous levels.
4656 Patch by Isamu Hasegawa.
4658 * Alpha, SPARC, and IA-64 now also using floating stacks.
4660 * Startup time of internationalized applications greatly improved through
4661 iconv cache. Use iconvconfig to generate the cache file.
4662 Contributed by Ulrich Drepper.
4664 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4665 severe performance problems. Patch by David Mosberger.
4667 * The Hurd port got a lot more functionality like AIO, various stdio
4668 extensions, etc. Mainly done by Roland McGrath.
4670 * mtrace can now lookup symbols in shared libraries.
4674 * Intel's IA-64 math library is largely integrated. It provides fast and
4675 accurate implementatations for most basic and standard math functions
4676 in float, double, and long double format.
4678 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4679 and asin for the 96-bit long double format and asin, log, tan for the
4680 128-bit long double format.
4682 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4683 The basic double functions exist today. Contributed by Abraham Ziv
4684 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4685 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4687 * An asynchronous name lookup library was added. The interface is designed
4688 after POSIX AIO. The proposal was circulated beforehand to get comments.
4689 No negative ones came in. Implemented by Ulrich Drepper.
4691 * Port to S390/64bit contributed by Martin Schwidefsky
4692 <schwidefsky@de.ibm.com>.
4694 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4695 of functions for Linux/IA-64.
4697 * The RPC code is now thread safe. Threads can now use the same service
4698 of different services at the same time. Patch by Eric Norum
4699 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4701 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4702 family of functions for Linux/S390.
4704 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4705 of functions for Linux/x86.
4707 * Port to Linux/CRIS contributed by Axis Communications.
4711 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4712 we can now check for namespace violations and missing declarations. The
4713 result is that almost all headers are now Unix-compliant (as defined in
4714 the upcoming XPG6). The negative side is that some programs might need
4715 corrections, too, if they depend on the incorrect form of the headers in
4716 previous versions which defined too many symbols and included too many
4719 * regex now handles multibyte character sets correctly.
4720 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4722 * iconv (the program) does now conform to the upcoming XPG6 and handles
4723 charmaps. Instead of the charset names the path of charmaps can be
4724 provided and the conversion happens based on this data.
4725 Contributed by Ulrich Drepper.
4727 * The locale program now provides detailed information about the installed
4732 only lists the names of the supported locales
4736 provides details such as country, language, and codeset name.
4737 Contributed by Ulrich Drepper.
4741 * The gencat program now parses the input file according to the charset
4742 selected by the LC_CTYPE category. This is important for stateful
4743 character sets. To make generating catalogs easier there is a way
4744 to overwrite the charset selected by the locale: before the first
4745 message or $ quote line the catalog can contain a line like
4747 $ codeset=ISO-8859-2
4749 to select the charset (ISO-8859-2 in this case).
4751 Implemented by Shinya Hanataka and Ulrich Drepper.
4753 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4754 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4755 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4757 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4758 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4760 * The LANGUAGE environment variable is now ignored unless the locale is
4761 changed from the default "C" locale.
4763 * The usual bug fixes.
4767 * Greg McGary added runtime support for bounds checking using gcc's
4768 new -fbounded-pointers option. ix86 target is complete. PowerPC
4771 * Thorsten Kukuk added secure mode support to nscd.
4773 * The Berkeley db libraries have been removed.
4775 Related, the nss_db module is now in a separate package since it
4776 obviously requires a database library being available.
4778 * Wide character I/O streams implemented by Ulrich Drepper.
4780 * Functions from the extended socket API added by Ulrich Drepper.
4782 * Functions feenableexcept and fedisableexcept to control the
4783 behaviour of individual exceptions have been added by Andreas Jaeger.
4785 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4787 * The resolver code has been updated from bind 8.2.3-T5B which supports
4788 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4791 This change could in some situations effect backward compatibility. Since
4792 now `_res' is a thread-local instead of a global variable, modifying it
4793 in one thread does not have any effect in other threads.
4795 The resolver library was also extended to allow IPv6 as the transport
4796 protocol for the requests. This work was done by Stig Venaas.
4798 * Compatibility code for K&R C compilers has been removed from the
4799 header files. A ISO C compiler is needed to use the library
4800 (conforming to either C89 or C99 standard).
4802 * Complete rewrite of the localedef program to support multibyte character
4803 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4804 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4805 Implemented by Ulrich Drepper.
4807 Bruno Haible significantly improved the generation and use of the data
4808 structures for the wide character tables.
4810 * Plural handling in gettext implemented by Ulrich Drepper.
4812 * The utmp daemon has been removed.
4814 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4816 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4819 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4821 * POSIX barriers implemented by Kaz Kylheku.
4823 * POSIX spawn function family implemented by Ulrich Drepper.
4825 * POSIX spinlocks are now available.
4827 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4829 * the configure option --enable-kernel=X.Y.Z allows to strip out
4830 compatibility for kernel versions before X.Y.Z. This is currently only
4831 implemented for Linux.
4833 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4834 field sin6_scope_id. This means that all programs using IPv6 should be
4835 recompiled. Don't expect binary compatibility with previous glibc
4838 * various conversion modules for IBM character sets contributed by
4841 * IA-64 port by Jes Sorensen and HJ Lu.
4855 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4857 * New xdr functions are added; some rpc functions are now 64bit clean.
4859 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4861 * Fixed known incompatibilities with glibc 2.0.
4863 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4865 * Optimized a number of functions (especially the ELF dynamic loader).
4867 * Update timezone data files.
4869 * lots of charmaps corrections
4871 * some new locale definitions and charmaps
4876 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4877 conform to POSIX member type requirements. Symbol versions have been
4878 adjusted as needed within the library, and for direct use by applications,
4879 but there is potential for problems if third-party libraries use
4880 struct timeval as part of their interface. This does not present
4881 a problem for X and other "essential" system libraries.
4883 * An additional locale model to support C++ Standard Library locale
4884 model and probably more was implemented by Ulrich Drepper.
4886 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4889 * Miles Bader provided the `argp' function family to support hierachical
4890 command line argument parsing, layered on top of getopt.
4892 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4894 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4897 * scanf recognizes the %a and %A format for scanning floating point numbers.
4899 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4900 information and interfaces for the available integer types.
4902 * about 130 new math functions were added to implement the ISO C9x math
4905 * the new header <complex.h> contains definitions of the complex math
4906 functions from ISO C 9X.
4908 * the new header <tgmath.h> defines generic macros to use complex or
4909 real valued functions.
4911 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4913 * Andreas Jaeger provided a test suite for the math library.
4915 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4917 * Ulrich Drepper added character set conversion functions (iconv).
4919 * Optimized string functions have been added.
4921 * The localedata addon is now part of glibc.
4923 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4925 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4926 daemon for NSS (nscd).
4928 Missing a better place here are some numbers on improvements. Under
4929 Linux 2.1.125 un-tar-ing the kernel sources takes
4933 using local files 12.19s 6.88s 22.91s
4935 using NIS 13.92s 8.91s 26.34s
4937 using NIS & nscd 10.37s 7.34s 25.30s
4939 using NIS+ 27.57s 30.37s 640.46s
4941 using NIS+ & nscd 10.25s 7.83s 26.51s
4943 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4945 Keep in mind that non-namelookup related operations dominate above times.
4946 It was just a common complain that using NIS+ unpacking the kernel is
4949 [1] The old nscd implementation is not available anymore since it was
4950 distributed with glibc up to version 2.0.98 and thus is now replaced.
4952 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4954 * Mark Kettenis provided a Hesiod NSS module.
4956 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4957 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4959 * rcmd can now handle netgroups (Dick Streefland).
4961 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4964 * Support for the IPv6 protocol has been added to the socket API, as per the
4965 latest draft standards.
4967 * Support for Linux 2.2 has been added.
4969 * Interface changes relative to the latest 2.0.x release:
4970 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4971 addseverity NEW: Unix98
4972 alphasort64 NEW: LFS
4973 argp_err_exit_status NEW: argp, GNU ext
4974 argp_error NEW: argp, GNU ext
4975 argp_failure NEW: argp, GNU ext
4976 argp_help NEW: argp, GNU ext
4977 argp_parse NEW: argp, GNU ext
4978 argp_program_bug_address NEW: argp, GNU ext
4979 argp_program_version NEW: argp, GNU ext
4980 argp_program_version_hook NEW: argp, GNU ext
4981 argp_state_help NEW: argp, GNU ext
4982 argp_usage NEW: argp, GNU ext
4983 authdes_create NEW: Secure RPC
4984 authdes_getucred NEW: Secure RPC
4985 authdes_pk_create NEW: Secure RPC
4986 backtrace NEW: GNU ext.
4987 backtrace_symbols NEW: GNU ext.
4988 backtrace_symbols_fd NEW: GNU ext.
4990 cacosf NEW: ISO C 9x
4991 cacosh NEW: ISO C 9x
4992 cacoshf NEW: ISO C 9x
4993 cacoshl NEW: ISO C 9x
4994 cacosl NEW: ISO C 9x
5001 casinf NEW: ISO C 9x
5002 casinh NEW: ISO C 9x
5003 casinhf NEW: ISO C 9x
5004 casinhl NEW: ISO C 9x
5005 casinl NEW: ISO C 9x
5007 catanf NEW: ISO C 9x
5008 catanh NEW: ISO C 9x
5009 catanhf NEW: ISO C 9x
5010 catanhl NEW: ISO C 9x
5011 catanl NEW: ISO C 9x
5012 cbc_crypt NEW: Secure RPC
5016 ccoshf NEW: ISO C 9x
5017 ccoshl NEW: ISO C 9x
5023 cimagf NEW: ISO C 9x
5024 cimagl NEW: ISO C 9x
5025 clearerr_locked REMOVED
5026 clntunix_create NEW: sunrpc ext
5028 clog10 NEW: ISO C 9x
5029 clog10f NEW: ISO C 9x
5030 clog10l NEW: ISO C 9x
5040 cprojf NEW: ISO C 9x
5041 cprojl NEW: ISO C 9x
5043 crealf NEW: ISO C 9x
5044 creall NEW: ISO C 9x
5049 csinhf NEW: ISO C 9x
5050 csinhl NEW: ISO C 9x
5053 csqrtf NEW: ISO C 9x
5054 csqrtl NEW: ISO C 9x
5058 ctanhf NEW: ISO C 9x
5059 ctanhl NEW: ISO C 9x
5061 des_setparity NEW: Secure RPC
5062 ecb_crypt NEW: Secure RPC
5063 endutxent NEW: Unix98
5065 exp10f NEW: ISO C 9x
5066 exp10l NEW: ISO C 9x
5070 fattach NEW: STREAMS
5071 fdetach NEW: STREAMS
5075 feclearexcept NEW: ISO C 9x
5076 fegetenv NEW: ISO C 9x
5077 fegetexceptflag NEW: ISO C 9x
5078 fegetround NEW: ISO C 9x
5079 feholdexcept NEW: ISO C 9x
5081 feraiseexcept NEW: ISO C 9x
5082 ferror_locked REMOVED
5083 fesetenv NEW: ISO C 9x
5084 fesetexceptflag NEW: ISO C 9x
5085 fesetround NEW: ISO C 9x
5086 fetestexcept NEW: ISO C 9x
5087 feupdateenv NEW: ISO C 9x
5088 fflush_locked REMOVED
5092 fgets_unlocked NEW: GNU ext.
5093 fileno_locked REMOVED
5105 fputc_locked REMOVED
5106 fputs_unlocked NEW: GNU ext.
5107 fread_unlocked NEW: GNU ext.
5112 fstatvfs NEW: Unix98
5116 ftruncate64 NEW: LFS
5118 fwrite_unlocked NEW: GNU ext.
5119 gai_strerror NEW: IPv6
5123 getchar_locked REMOVED
5125 getdate_err NEW: Unix98
5126 getdate_r NEW: GNU ext.
5128 getnameinfo NEW: IPv6
5129 getnetname NEW: Secure RPC
5130 getpmsg NEW: STREAMS
5131 getpt NEW: Unix98 PTY
5132 getrlimit64 NEW: LFS
5133 getutxent NEW: Unix98
5134 getutxid NEW: Unix98
5135 getutxline NEW: Unix98
5136 glob64 NEW: GNU ext.
5137 globfree64 NEW: GNU ext.
5138 gnu_get_libc_release NEW: GNU ext.
5139 gnu_get_libc_version NEW: GNU ext.
5140 grantpt NEW: Unix98 PTY
5141 host2netname NEW: Secure RPC
5143 iconv_close NEW: iconv
5144 iconv_open NEW: iconv
5145 if_freenameindex NEW: IPv6
5146 if_indextoname NEW: IPv6
5147 if_nameindex NEW: IPv6
5148 if_nametoindex NEW: IPv6
5149 in6addr_any NEW: IPv6
5150 in6addr_loopback NEW: IPv6
5151 inet6_isipv4mapped NEW: IPv6
5152 isastream NEW: STREAMS
5153 iswblank NEW: GNU ext.
5154 key_decryptsession NEW: Secure RPC
5155 key_decryptsession_pk NEW: Secure RPC
5156 key_encryptsession NEW: Secure RPC
5157 key_encryptsession_pk NEW: Secure RPC
5158 key_gendes NEW: Secure RPC
5159 key_get_conv NEW: Secure RPC
5160 key_secretkey_is_set NEW: Secure RPC
5161 key_setnet NEW: Secure RPC
5162 key_setsecret NEW: Secure RPC
5163 llrint NEW: ISO C 9x
5164 llrintf NEW: ISO C 9x
5165 llrintl NEW: ISO C 9x
5166 llround NEW: ISO C 9x
5167 llroundf NEW: ISO C 9x
5168 llroundl NEW: ISO C 9x
5173 lrintf NEW: ISO C 9x
5174 lrintl NEW: ISO C 9x
5175 lround NEW: ISO C 9x
5176 lroundf NEW: ISO C 9x
5177 lroundl NEW: ISO C 9x
5179 makecontext NEW: Unix98
5180 mempcpy NEW: GNU ext.
5183 modify_ldt NEW: kernel
5187 nearbyint NEW: ISO C 9x
5188 nearbyintf NEW: ISO C 9x
5189 nearbyintl NEW: ISO C 9x
5190 netname2host NEW: Secure RPC
5191 netname2user NEW: Secure RPC
5192 nexttoward NEW: ISO C 9x
5193 nexttowardf NEW: ISO C 9x
5194 nexttowardl NEW: ISO C 9x
5198 passwd2des NEW: Secure RPC
5200 pow10f NEW: GNU ext.
5201 pow10l NEW: GNU ext.
5204 printf_size NEW: GNU ext.
5205 printf_size_info NEW: GNU ext.
5206 profil_counter REMOVED
5207 pthread_mutexattr_getkind_np REPLACED
5208 pthread_mutexattr_setkind_np REPLACED
5209 ptsname NEW: Unix98 PTY
5210 ptsname_r NEW: Unix98 PTY
5212 putchar_locked REMOVED
5213 putgrent NEW: GNU ext.
5215 putpmsg NEW: STREAMS
5216 pututxline NEW: Unix98
5220 readdir64_r NEW: LFS
5221 remquo NEW: ISO C 9x
5222 remquof NEW: ISO C 9x
5223 remquol NEW: ISO C 9x
5225 roundf NEW: ISO C 9x
5226 roundl NEW: ISO C 9x
5228 scalbln NEW: ISO C 9x
5229 scalblnf NEW: ISO C 9x
5230 scalblnl NEW: ISO C 9x
5232 sendfile NEW: kernel
5233 setcontext NEW: Unix98
5234 setrlimit64 NEW: LFS
5235 setutxent NEW: Unix98
5237 sigignore NEW: Unix98
5238 sigqueue NEW: POSIX.1b
5239 sigrelse NEW: Unix98
5240 sigset NEW: POSIX.1b
5241 sigtimedwait NEW: POSIX.1b
5242 sigwaitinfo NEW: POSIX.1b
5243 sincos NEW: GNU ext.
5244 sincosf NEW: GNU ext.
5245 sincosl NEW: GNU ext.
5249 strcasestr NEW: GNU ext.
5250 strtoimax NEW: ISO C 9x
5251 strtoumax NEW: ISO C 9x
5252 strverscmp NEW: GNU ext.
5253 svcauthdes_stats NEW: Secure RPC
5254 svcunix_create NEW: sunrpc etx
5255 svcunixfd_create NEW: sunrpc ext
5256 swapcontext NEW: Unix98
5257 tcgetsid NEW: Unix98 PTY
5258 tdestroy NEW: GNU ext.
5259 tgamma NEW: ISO C 9x
5260 tgammaf NEW: ISO C 9x
5261 tgammal NEW: ISO C 9x
5265 truncf NEW: ISO C 9x
5266 truncl NEW: ISO C 9x
5268 unlockpt NEW: Unix98 PTY
5269 updwtmpx NEW: Unix98
5270 user2netname NEW: Secure RPC
5271 utmpxname NEW: Unix98
5272 versionsort NEW: GNU ext.
5273 versionsort64 NEW: GNU ext.
5275 wcscasecmp NEW: GNU ext.
5276 wcsncasecmp NEW: GNU ext.
5277 wcsnlen NEW: GNU ext.
5278 wcstoimax NEW: ISO C 9x
5279 wcstoll NEW: ISO C 9x
5280 wcstoull NEW: ISO C 9x
5281 wcstoumax NEW: ISO C 9x
5283 wordexp NEW: POSIX.2
5284 wordfree NEW: POSIX.2
5285 write_profiling REMOVED
5286 xdecrypt NEW: Secure RPC
5287 xdr_authdes_cred NEW: Secure RPC
5288 xdr_authdes_verf NEW: Secure RPC
5289 xdr_cryptkeyarg NEW: Secure RPC
5290 xdr_cryptkeyarg2 NEW: Secure RPC
5291 xdr_cryptkeyres NEW: Secure RPC
5292 xdr_getcredres NEW: Secure RPC
5293 xdr_key_netstarg NEW: Secure RPC
5294 xdr_key_netstres NEW: Secure RPC
5295 xdr_keybuf NEW: Secure RPC
5296 xdr_keystatus NEW: Secure RPC
5297 xdr_netnamestr NEW: Secure RPC
5298 xdr_sizeof NEW: Secure RPC
5299 xdr_unixcred NEW: sunrpc ext
5300 xencrypt NEW: Secure RPC
5301 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5312 * inet_ntoa is thread-safe
5314 * updwtmp is moved from libutil to libc
5316 * rewrite of cbrt function
5318 * update of timezone data
5332 * add atoll function
5334 * fix complex problems in Berkeley DB code
5336 * fix math functions
5340 * fixed lots of header problems (especially Linux/GNU specific)
5342 * dynamic loader preserves all registers
5344 * Roland McGrath provided support for handling of auxiliary objects in
5345 the ELF dynamic loader.
5347 * support for parallel builds is improved
5351 * GNU extensions are no longer declared by default. To enable them you
5352 must define the macro `_GNU_SOURCE' in your program or compile with
5355 * The library has changed from using GNU ld symbol aliases to using weak
5356 symbols where available. The ELF object file format supports weak
5357 symbols; GNU ld also supports weak symbols in the a.out format. (There
5358 is also now support for other GNU ld extensions in ELF. Use the
5359 `--with-elf' option to configure to indicate you have ELF, and
5360 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5361 of many files which contained only symbol aliases, reducing the size of
5362 the source and the compiled library; many other files were renamed to
5363 less cryptic names previously occupied by the symbol alias files.
5364 There is a new header file <elf.h> for programs which operate on
5365 files in the ELF format.
5367 * Converted to Autoconf version 2, so `configure' has more options.
5368 Run `configure --help' to see the details.
5370 * The library can now be configured to build profiling, highly-optimized
5371 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5372 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5373 `configure' enable building these extra libraries. The shared library is
5374 built by default when using both ELF and GNU ld. When shared libraries
5375 are enabled, the new library `-ldl' is available for arbitrary run-time
5376 loading of shared objects; its interface is defined in <dlfcn.h>. The
5377 new header file <link.h> gives access to the internals of the run-time
5378 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5379 application of same name on other systems and it provides information
5380 about dynamically linked binaries.
5382 * The C library now provides the run-time support code for profiling
5383 executables compiled with `-pg'. Programs can control the profiling code
5384 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5385 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5386 the support for this file format was contributed by David Mosberger-Tang.
5388 * The math code has been replaced with a math library based on fdlibm from
5389 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5390 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5391 functions. The math functions now reside in a separate library, so
5392 programs using them will need to use `-lm' their linking commands.
5394 * John C. Bowman contributed optimized ix87 assembler inline functions.
5396 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5397 mechanism similar to that found in Solaris 2. This is now used for the
5398 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5399 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5400 file controls what services are used for each individual database. This
5401 works by loading shared libraries with names specified in `nsswitch.conf',
5402 so service modules can be changed or added at any time without even
5403 relinking any program. Currently there are the file, db, and NIS based
5404 NSS services available.
5406 * The new functions `strtoq' and `strtouq' parse integer values from
5407 strings, like `strtol' and `strtoul', but they return `long long int' and
5408 `unsigned long long int' values, respectively (64-bit quantities).
5410 * The new functions `strtof' and `strtold' parse floating-point values from
5411 strings, like `strtod', but they return `float' and `long double' values,
5412 respectively (on some machines `double' and `long double' are the same).
5414 * Ulrich Drepper has contributed new implementations of the floating-point
5415 printing and reading code used in the `printf' family of functions and
5416 `strtod', `strtof', and `strtold'. These new functions are perfectly
5417 accurate, and much faster than the old ones.
5419 * The implementation of the POSIX locale model was completely rewritten by
5420 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5421 to compile the POSIX locale definition.
5423 * The former dummy implementations of the strcoll and strxfrm function are
5424 now replaced by fully functional code contributed by Ulrich Drepper. The
5425 collation information comes from the POSIX locale definitions.
5427 * The new header <langinfo.h> defines an interface for accessing
5428 various locale-dependent data (using the locale chosen with `setlocale').
5430 * Ulrich Drepper has contributed a new suite of functions for operation on
5431 wide-character and multibyte-character strings, in <wchar.h>;
5432 and classification and case conversion of wide characters, in <wctype.h>.
5433 These new functions are conforming to the ISO C, Amendement 1 specification.
5435 * There is now a second implementation of the standard I/O library available.
5436 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5437 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5439 * You can now use positional parameter specifications in format strings
5440 for the `printf' and `scanf' families of functions. For example,
5441 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5442 ``Number 6, Mr Jones''. This is mainly useful when providing different
5443 format strings for different languages, whose grammars may dictate
5444 different orderings of the values being printed. To support this
5445 feature, the interface for `register_printf_handler' has changed; see
5446 the header file <printf.h> for details.
5448 * The `printf' and `scanf' families of functions now understand a new
5449 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5450 to group numbers as indicated by the locale; for `scanf' and friends, this
5451 says to accept as valid only a number with all the proper grouping
5452 separators in the right places. In the default "C" locale, numbers are
5453 not grouped; but locales for specific countries will define the usual
5454 conventions (i.e. separate thousands with `,' in the US locale).
5456 * The pgrp functions have been regularized, slightly incompatibly but much
5457 less confusingly. The core functions are now `getpgid' and `setpgid',
5458 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5459 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5460 provided for compatibility. There is no longer an incompatible `getpgrp'
5461 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5463 * The new header file <fts.h> and suite of functions simplify programs that
5464 operate on directory trees. This code comes from 4.4 BSD.
5466 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5467 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5468 NSS scheme used in glibc.
5470 * There is a new malloc debugging hook `__memalign_hook'.
5472 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5473 `unsigned int' in <sys/types.h>. These are for compatibility only and
5474 their use is discouraged.
5476 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5477 done differently, so that it works even without GNU ld.
5479 * New function `euidaccess' checks allowed access to a file like `access',
5480 but using the effective IDs instead of the real IDs.
5482 * The time zone data files have been updated for the latest and greatest
5483 local time conventions of the countries of the world.
5485 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5488 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5489 for formatting floating-point numbers. They are provided only for
5490 compatibility; new programs should use `sprintf' instead. There are
5491 also equivalent function for the `long double' floating-point type and
5492 all functions also exist in a reentrant form.
5494 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5495 functions for maintaining the login-record files (primarily of use to
5496 system programs such as `login'), and convenient functions for
5497 allocating and initializing a pseudo-terminal (pty) device.
5499 * Ulrich Drepper has contributed new support for System V style
5500 shared memory and IPC on systems that support it.
5502 * Ulrich Drepper has contributed several miscellaneous new functions found
5503 in System V: The `hsearch' family of functions provide an effective
5504 implementation of hash tables; `a64l' and `l64a' provide a very simple
5505 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5508 * Ulrich Drepper has contributed new reentrant counterparts for the
5509 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5511 * Ulrich Drepper has contributed new, highly-optimized versions of several
5512 string functions for the i486/Pentium family of processors.
5514 * Ulrich Drepper has updated the Linux-specific code, based largely
5515 on work done in Hongjiu Lu's version of GNU libc for Linux.
5516 The GNU library now supports Linux versions 2.0.10 and later,
5517 using the ELF object file format (i[3456]86-*-linux).
5519 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5521 * David Mosberger-Tang and Richard Henderson have ported the C library
5522 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5523 dynamic linking support for ELF/Alpha.
5525 * Richard Henderson contributed several Alpha optimized assembler function
5526 for arithmetic and string handling.
5528 * Ulrich Drepper has contributed a new set of message catalog functions to
5529 support multiple languages using the <libintl.h> interface, for use with
5530 his new package GNU gettext. Translation volunteers have contributed
5531 catalogs of the library's messages in Spanish, German, and Korean.
5533 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5534 program and the `catgets' function for reading the catalog files it
5535 creates. (The <libintl.h> interface is preferred; we include the
5536 <nl_types.h> interface using `catgets' only for source compatibility with
5537 programs already written to use it.)
5539 * New header file <values.h> gives SVID-compatible names for <limits.h>
5542 * Various new macros, declarations, and small header files for compatibility
5545 * New function `group_member' is a convenient way to check if a process has
5546 a given effective group ID.
5548 * When using GCC 2.7 and later, the socket functions are now declared in a
5549 special way so that passing an argument of type `struct sockaddr_in *',
5550 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5551 `struct sockaddr *' type, does not generate a type-clash warning.
5553 * New function `error' declared in header file <error.h> is a convenient
5554 function for printing error messages and optionally exiting; this is the
5555 canonical function used in GNU programs. The new functions `err', `warn',
5556 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5557 doing the same thing.
5559 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5560 POSIX.2 `glob' function to do ~ and {...} expansion.
5562 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5563 `clearenv' which is used in POSIX.9 is also available.
5565 * New function `getsid' returns session ID number on systems that support it.
5567 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5568 files <db.h> and <mpool.h> provide a rich set of functions for several
5569 types of simple databases stored in memory and in files, and <ndbm.h> is
5570 an old `ndbm'-compatible interface using the `db' functions. Link with
5571 `-ldb' to get these functions.
5573 * New macro `strdupa' copies a string like `strdup', but uses local stack
5574 space from `alloca' instead of dynamic heap space from `malloc'.
5576 * New function `strnlen' is like `strlen' but searches only a given maximum
5577 number of characters for the null terminator. `stpncpy', `strndup' and
5578 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5581 * New function `statfs' in header <sys/statfs.h>.
5583 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5584 provide convenient functions for operating on blocks of null-terminated
5587 * A new suite of functions in <utmp.h> handle all the details of reading
5588 and writing the utmp file.
5590 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5593 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5594 completely POSIX compliant and also implemented the extended functionality
5595 to handle alternate digit representation and alternate era date formats.
5597 * Ulrich Drepper provided an implementation of the `strptime' function
5598 defined in XPG4.2 which transforms a string into a `struct tm' value.
5600 * Paul Eggert provided the tzselect shell script as part of the timezone
5601 code. The shell script makes it easy to select the correct timezone
5604 * The implementation of the malloc family of functions is completely replaced
5605 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5606 The implementation uses the mmap function (if available) and it is
5607 optimized for the use in multi threaded programs.
5609 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5610 functions. This new functionality is usable by specifying a special
5611 salt string and it is compatible with implementation on *BSD systems.
5613 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5614 `getsubopt' to handle second level command line options, `bsd_signal'
5615 to access BSD style `signal' functionality, the obsolete `regexp' style
5618 * the `lchown' function is available on system which support this
5621 * The implementation of the shadow password handling function was contributed
5624 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5626 * POSIX.1g support was added. The <sys/select.h> header is available,
5627 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5628 implementation of `getaddrinfo'.
5632 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5634 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5635 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5637 * The new function `daemon' from 4.4 BSD is useful for server programs that
5638 want to put themselves in the background.
5640 * Joel Sherrill has contributed support for several standalone boards that
5641 run without an operating system.
5643 * `printf', `scanf' and friends now accept a `q' type modifier for long
5644 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5646 * All of the code taken from BSD (notably most of the math and networking
5647 routines) has been updated from the BSD 4.4-Lite release.
5649 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5651 * The new functions `getdomainname' and `setdomainname' fetch or change the
5652 YP/NIS domain name. These are system calls which exist on systems which
5655 * The time zone data files have been updated for the latest international
5658 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5659 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5663 * The C library now includes support for Sun RPC, from Sun's free
5664 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5665 are included. (There is still no support for YP.)
5667 * Tom Quinn has contributed a port of the C library to SGI machines running
5668 Irix 4 (mips-sgi-irix4).
5670 * The new `lockf' function is a simplified interface to the locking
5671 facilities of `fcntl', included for compatibility.
5673 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5675 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5677 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5680 * The error message printed by `assert' for a failed assertion now includes
5681 the name of the program (if using GNU ld) and the name of the calling
5682 function (with versions of GCC that support this).
5684 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5686 * The library now includes the <sys/mman.h> header file and memory
5687 management functions `mmap', `munmap', `mprotect', `msync', and
5688 `madvise', on systems that support those facilities.
5690 * The interface for `mcheck' has changed slightly: the function called to
5691 abort the program when an allocation inconsistency is detected now takes
5692 an argument that indicates the type of failure. The new function
5693 `mprobe' lets you request a consistency check for a particular block at
5694 any time (checks are normally done only when you call `free' or `realloc'
5697 * It is now possible to easily cross-compile the C library, building on one
5698 system a library to run on another machine and/or operating system. All
5699 you need to do is set the variable `HOST_CC' in `configparms' to the
5700 native compiler for programs to run on the machine you are building on (a
5701 few generator programs are used on Unix systems); set `CC' to the
5704 * The new function `fexecve' (only implemented on the GNU system) executes
5705 a program file given a file descriptor already open on the file.
5709 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5710 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5712 * You can set the variable `libprefix' in `configparms' to specify a prefix
5713 to be prepended to installed library files; this makes it easy to install
5714 the GNU C library to be linked as `-lgnuc' or whatever.
5716 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5717 copies a limited number of characters from a string, and returns the
5718 address of the last character written.
5720 * You no longer need to check for whether the installed `stddef.h' is
5721 compatible with the GNU C library. configure now checks for you.
5723 * You can now define a per-stream `fileno' function to convert the
5724 stream's cookie into an integral file descriptor.
5726 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5727 allocates zero bytes of storage, and returns a unique pointer which
5728 you can pass to `realloc' or `free'. The behavior is undefined if
5729 you dereference this pointer.
5731 * The C library now runs on Sony NEWS m68k machines running either
5732 NewsOS 3 or NewsOS 4.
5734 * The new `syscall' function is a system-dependent primitive function
5735 for invoking system calls. It has the canonical behavior on Unix
5736 systems, including unreliable return values for some calls (such as
5737 `pipe', `fork' and `getppid').
5739 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5740 to `EAGAIN', which is the preferred name. On systems whose kernels
5741 use two distinct codes, the C library now translates EWOULDBLOCK to
5742 EAGAIN in every system call function.
5746 * The GNU C Library Reference Manual is now distributed with the library.
5747 `make dvi' will produce a DVI file of the printed manual.
5748 `make info' will produce Info files that you can read on line using C-h i
5749 in Emacs or the `info' program.
5750 Please send comments on the manual to bug-glibc-manual@gnu.org.
5752 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5754 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5756 * Jason Merrill has contributed a port to the Sequent Symmetry running
5757 Dynix version 3 (i386-sequent-dynix).
5759 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5760 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5762 * New function `memory_warnings' lets you arrange to get warnings when
5763 malloc is running out of memory to allocate, like Emacs gives you.
5765 * The C library now contains the relocating allocator used in Emacs 19 for
5766 its editing buffers. This allocator (ralloc) minimizes allocation
5767 overhead and fragmentation by moving allocated regions around whenever it
5768 needs to. You always refer to a ralloc'd region with a "handle" (a
5769 pointer to a pointer--an object of type `void **').
5771 * There is a new `printf' format: `%m' gives you the string corresponding
5772 to the error code in `errno'.
5774 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5775 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5776 pass, the `a' modifier says to fill in a `char **' you pass with a
5779 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5780 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5781 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5783 * `mkstemp' is a traditional Unix function to atomically create and open a
5784 uniquely-named temporary file.
5788 * The standard location for the file that says what the local timezone is
5789 has changed again. It is now `/usr/local/etc/localtime' (or more
5790 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5792 * The distribution no longer contains any files with names longer than 14
5795 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5796 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5798 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5802 * The configuration process has changed quite a bit. The `configure'
5803 script is now used just like the configuration scripts for other GNU
5804 packages. The `sysdeps' directory hierarchy is much rearranged.
5805 The file `INSTALL' explains the new scheme in detail.
5807 * The header files no longer need to be processed into ANSI C and
5808 traditional C versions. There is just one set of files to install, and
5809 it will work with ANSI or old C compilers (including `gcc -traditional').
5811 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5812 MIPS DECStation running Ultrix 4.
5814 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5815 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5816 made itself into a shared library.
5818 * Yet further improved support for the i386, running 4.3 BSD-like systems
5819 (such as Mach 3 with the Unix single-server), or System V.
5821 * New function `strncasecmp' to do case-insensitive string comparison
5822 with limited length.
5824 * New function `strsep' is a reentrant alternative to `strtok'.
5826 * New functions `scandir' and `alphasort' for searching directories.
5828 * New function `setenv' is a better interface to `putenv'.
5830 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5831 function for traversing a directory tree.
5833 * The GNU obstack package is now also part of the C library.
5834 The new function `open_obstack_stream' creates a stdio stream that
5835 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5836 formatted output directly to an obstack.
5838 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5839 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5841 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5843 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5844 things to your strings.
5846 * There are some new test programs: test-fseek, testmb, and testrand.
5848 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5849 These ports are not finished, but are a good starting place for really
5850 supporting those systems.
5852 * `/etc/localtime' is now the standard location for the file that says what
5853 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5854 This follows the general principle that `/etc' is the place for all local
5855 configuration files.
5857 * The C library header files now use `extern "C"' when used by the C++
5858 compiler, so the C library should now work with C++ code.
5860 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5861 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5864 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5865 function which uses the `merge sort' algorithm, and is said to be
5866 significantly faster than the old GNU `qsort' function. Merge sort is
5867 now the standard `qsort' function. The new algorithm can require a lot
5868 of temporary storage; so, the old sorting function is called when the
5869 required storage is not available.
5871 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5872 provides the Unix `crypt' function, plus some other entry points.
5874 * The code and header files taken from 4.4 BSD have been updated with the
5875 latest files released from Berkeley.
5877 ----------------------------------------------------------------------
5878 Copyright information:
5880 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5882 Permission is granted to anyone to make or distribute verbatim copies
5883 of this document as received, in any medium, provided that the
5884 copyright notice and this permission notice are preserved,
5885 thus giving the recipient permission to redistribute in turn.
5887 Permission is granted to distribute modified versions
5888 of this document, or of portions of it,
5889 under the above conditions, provided also that they
5890 carry prominent notices stating who last changed them.
5893 version-control: never