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 [Add security related changes here]
26 The following bugs are resolved with this release:
28 [The release manager will add the list generated by
29 scripts/list-fixed-bugs.py just before the release.]
35 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
36 enable features from the draft ISO C2X standard. Only some features from
37 this draft standard are supported by the GNU C Library, and as the draft
38 is under active development, the set of features enabled by this macro is
39 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
40 by compiling with "gcc -std=gnu2x".
42 * The <math.h> functions that round their results to a narrower type now
43 have corresponding type-generic macros in <tgmath.h>, as defined in TS
44 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
45 Clarification Request 13 to TS 18661-3.
47 * The function pthread_clockjoin_np has been added, enabling join with a
48 terminated thread with a specific clock. It allows waiting against
49 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
51 * New locale added: mnw_MM (Mon language spoken in Myanmar).
53 * The DNS stub resolver will optionally send the AD (authenticated data) bit
54 in queries if the trust-ad option is set via the options directive in
55 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
56 mode, the AD bit, as provided by the name server, is available to
57 applications which call res_search and related functions. In the default
58 mode, the AD bit is not set in queries, and it is automatically cleared in
59 responses, indicating a lack of DNSSEC validation. (Therefore, the name
60 servers and the network path to them are treated as untrusted.)
62 Deprecated and removed features, and other changes affecting compatibility:
64 * The totalorder and totalordermag functions, and the corresponding
65 functions for other floating-point types, now take pointer arguments to
66 avoid signaling NaNs possibly being converted to quiet NaNs in argument
67 passing. This is in accordance with the resolution of Clarification
68 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
69 floating-point arguments directly will continue to work.
71 * The obsolete function stime is no longer available to newly linked
72 binaries, and its declaration has been removed from <time.h>.
73 Programs that set the system time should use clock_settime instead.
75 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
76 in a future version of glibc. In this release, the header still exists
77 but calling ftime will cause a compiler warning. All programs should use
78 gettimeofday or clock_gettime instead.
80 * The gettimeofday function no longer reports information about a
81 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
82 many years, as it cannot handle the full complexity of the world's
83 timezones, but hitherto we have supported it on a best-effort basis.
84 Changes required to support 64-bit time_t on 32-bit architectures have
85 made this no longer practical.
87 As of this release, callers of gettimeofday with a non-null 'tzp' argument
88 should expect to receive a 'struct timezone' whose tz_minuteswest and
89 tz_dsttime fields are zero. (For efficiency reasons, this does not always
90 happen on a few Linux-based ports. This will be corrected in a future
93 All callers should supply a null pointer for the 'tzp' argument to
94 gettimeofday. For accurate information about the time zone associated
95 with the current time, use the localtime function.
97 gettimeofday itself is obsolescent according to POSIX. We have no plans
98 to remove access to this function, but portable programs should consider
99 using clock_gettime instead.
101 * The settimeofday function can still be used to set a system-wide time
102 zone when the operating system supports it. This is because the Linux
103 kernel reused the API, on some architectures, to describe a system-wide
104 time-zone-like offset between the software clock maintained by the kernel,
105 and the "RTC" clock that keeps time when the system is shut down.
107 However, to reduce the odds of this offset being set by accident,
108 settimeofday can no longer be used to set the time and the offset
109 simultaneously. If both of its two arguments are non-null, the call
110 will fail (setting errno to EINVAL).
112 Callers attempting to set this offset should also be prepared for the call
113 to fail and set errno to ENOSYS; this already happens on the Hurd and on
114 some Linux architectures. The Linux kernel maintainers are discussing a
115 more principled replacement for the reused API. After a replacement
116 becomes available, we will change settimeofday to fail with ENOSYS on all
117 platforms when its 'tzp' argument is not a null pointer.
119 settimeofday itself is obsolescent according to POSIX. Programs that set
120 the system time should use clock_settime and/or the adjtime family of
121 functions instead. We may cease to make settimeofday available to newly
122 linked binaries after there is a replacement for Linux's time-zone-like
125 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
126 the optional CAS instruction is implemented (for instance, LEON processors
127 are still supported, but SuperSPARC processors are not).
129 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
132 * If a lazy binding failure happens during dlopen, during the execution of
133 an ELF constructor, the process is now terminated. Previously, the
134 dynamic loader would return NULL from dlopen, with the lazy binding error
135 captured in a dlerror message. In general, this is unsafe because
136 resetting the stack in an arbitrary function call is not possible.
138 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
139 executable stack unless explicitly configured at build time to require
140 minimum kernel version 4.8 or newer. This is because executing
141 floating-point branches on a non-executable stack on Linux kernels prior to
142 4.8 can lead to application crashes for some MIPS configurations. While
143 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
144 expected to enable non-executable stack by default with PT_GNU_STACK by
145 default and is thus likely to trigger a crash on older kernels.
147 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
148 non-executable stack while dropping support for older kernels.
150 * System call wrappers for time system calls now use the new time64 system
151 calls when available. On 32-bit targets, these wrappers attempt to call
152 the new system calls first and fall back to the older 32-bit time system
153 calls if they are not present. This may cause issues in environments
154 that cannot handle unsupported system calls gracefully by returning
155 -ENOSYS. Seccomp sandboxes are affected by this issue.
157 Changes to build and runtime requirements:
159 * It is no longer necessary to have recent Linux kernel headers to build
160 working (non-stub) system call wrappers on all architectures except 64-bit
161 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
163 * The ChangeLog file is no longer present in the toplevel directory of the
164 source tree. ChangeLog files are located in the ChangeLog.old directory as
165 ChangeLog.N where the highest N has the latest entries.
167 Security related changes:
169 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
170 environment variable during program execution after a security
171 transition, allowing local attackers to restrict the possible mapping
172 addresses for loaded libraries and thus bypass ASLR for a setuid
173 program. Reported by Marcin KoĆcielnicki.
175 The following bugs are resolved with this release:
177 [12031] localedata: iconv -t ascii//translit with Greek characters
178 [15813] libc: Multiple issues in __gen_tempname
179 [17726] libc: [arm, sparc] profil_counter should be compat symbol
180 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
181 [19767] libc: vdso is not used with static linking
182 [19903] hurd: Shared mappings not being inherited by children processes
183 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
184 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
186 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
187 Symbols-A/B Unicode blocks
188 [23518] libc: Eliminate __libc_utmp_jump_table
189 [24026] malloc: malloc_info() returns wrong numbers
190 [24054] localedata: Many locales are missing date_fmt
191 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
192 [24304] dynamic-link: Lazy binding failure during ELF
193 constructors/destructors is not fatal
194 [24376] libc: RISC-V symbol size confusion with _start
195 [24682] localedata: zh_CN first weekday should be Monday per GB/T
197 [24824] libc: test-in-container does not install charmap files compatible
199 [24844] regex: regex bad pointer / leakage if malloc fails
200 [24867] malloc: Unintended malloc_info formatting changes
201 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
202 [24880] libc: login: utmp implementation uses struct flock with fcntl64
203 [24882] libc: login: pututline uses potentially outdated cache
204 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
205 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
207 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
209 [24930] dynamic-link: dlopen of PIE executable can result in
210 _dl_allocate_tls_init assertion failure
211 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
212 (stringop-overflow error)
213 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
214 functions other can lead to crashes
215 [24967] libc: jemalloc static linking causes runtime failure
216 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
218 [25035] libc: sbrk() failure handled poorly in tunables_strdup
219 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
220 [25097] libc: new -Warray-bounds with GCC 10
221 [25112] dynamic-link: dlopen must not make new objects accessible when it
222 still can fail with an error
223 [25139] localedata: Please add the new mnw_MM locale
224 [25149] regex: Array bounds violation in proceed_next_node
225 [25157] dynamic-link: Audit cookie for the dynamic loader is not
226 initialized correctly
227 [25189] libc: glibc's __glibc_has_include causes issues with clang
229 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
231 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
232 binaries (CVE-2019-19126)
233 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
235 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
237 [25232] string: <string.h> does not enable const correctness for strchr et
239 [25233] localedata: Consider "." as the thousands separator for sl_SI
241 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
242 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
243 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
245 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
246 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
248 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
249 (dl_initfirst) link map pointer
250 [25401] malloc: pvalloc must not have __attribute_alloc_size__
251 [25423] libc: Array overflow in backtrace on powerpc
252 [25425] network: Missing call to __resolv_context_put in
253 getaddrinfo.c:gethosts
260 * Unicode 12.1.0 Support: Character encoding, character type info, and
261 transliteration tables are all updated to Unicode 12.1.0, using
262 generator scripts contributed by Mike FABIAN (Red Hat).
264 * The dynamic linker accepts the --preload argument to preload shared
265 objects, in addition to the LD_PRELOAD environment variable.
267 * The twalk_r function has been added. It is similar to the existing
268 twalk function, but it passes an additional caller-supplied argument
269 to the callback function.
271 * On Linux, the getdents64, gettid, and tgkill functions have been added.
273 * Minguo (Republic of China) calendar support has been added as an
274 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
277 * The entry for the new Japanese era has been added for ja_JP locale.
279 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
280 pvalloc, memalign, and posix_memalign fail now with total object size
281 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
282 pointer subtraction within the allocated object, where results might
283 overflow the ptrdiff_t type.
285 * The dynamic linker no longer refuses to load objects which reference
286 versioned symbols whose implementation has moved to a different soname
287 since the object has been linked. The old error message, symbol
288 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
289 link time reference, is gone.
291 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
292 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
293 functions. These behave similarly to their "timed" equivalents, but also
294 accept a clockid_t parameter to determine which clock their timeout should
295 be measured against. All functions allow waiting against CLOCK_MONOTONIC
296 and CLOCK_REALTIME. The decision of which clock to be used is made at the
297 time of the wait (unlike with pthread_condattr_setclock, which requires
298 the clock choice at initialization time).
300 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
301 work, new resolvers can use a second argument which can be extended in
302 the future, currently it contains the AT_HWCAP2 value.
304 Deprecated and removed features, and other changes affecting compatibility:
306 * The copy_file_range function fails with ENOSYS if the kernel does not
307 support the system call of the same name. Previously, user space
308 emulation was performed, but its behavior did not match the kernel
309 behavior, which was deemed too confusing. Applications which use the
310 copy_file_range function can no longer rely on glibc to provide a fallback
311 on kernels that do not support the copy_file_range system call, and if
312 this function returns ENOSYS, they will need to use their own fallback.
313 Support for copy_file_range for most architectures was added in version
314 4.5 of the mainline Linux kernel.
316 * The functions clock_gettime, clock_getres, clock_settime,
317 clock_getcpuclockid, clock_nanosleep were removed from the librt library
318 for new applications (on architectures which had them). Instead, the
319 definitions in libc will be used automatically, which have been available
322 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
323 and <sys/stropts.h> have been removed.
325 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
326 resolver flag (deprecated in glibc 2.25) have been removed.
328 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
329 resolver have been removed from <resolv.h>.
331 * With --enable-bind-now, installed programs are now linked with the
334 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
335 configurations) has been removed, following the deprecation of this
336 subarchitecture in version 8 of GCC, and its removal in version 9.
338 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
339 header have been removed.
341 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
342 deprecated and will be removed from a future version of glibc.
343 Application should directly access /proc instead. For obtaining random
344 bits, the getentropy function can be used.
346 Changes to build and runtime requirements:
348 * GCC 6.2 or later is required to build the GNU C Library.
350 Older GCC versions and non-GNU compilers are still supported when
351 compiling programs that use the GNU C Library.
353 Security related changes:
355 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
356 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
357 has undefined behavior. On x32, the size_t argument may be passed
358 in the lower 32 bits of the 64-bit RDX register with non-zero upper
359 32 bits. When it happened with the sign bit of RDX register set,
360 memcmp gave the wrong result since it treated the size argument as
361 zero. Reported by H.J. Lu.
363 CVE-2019-9169: Attempted case-insensitive regular-expression match
364 via proceed_next_node in posix/regexec.c leads to heap-based buffer
365 over-read. Reported by Hongxu Chen.
367 The following bugs are resolved with this release:
369 [2872] locale: Transliteration Cyrillic -> ASCII fails
370 [6399] libc: gettid() should have a wrapper
371 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
372 [16976] glob: fnmatch unbounded stack VLA for collating symbols
373 [17396] localedata: globbing for locale by [[.collating-element.]]
374 [18035] dynamic-link: pldd does no longer work, enters infinite loop
375 [18465] malloc: memusagestat is built using system C library
376 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
377 invalid input drops valid char
378 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
379 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
380 [21897] localedata: Afar locales: Fix mon, abmon, and abday
381 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
382 [23352] malloc: __malloc_check_init still defined in public header
384 [23403] nptl: Wrong alignment of TLS variables
385 [23501] libc: nftw() doesn't return dangling symlink's inode
386 [23733] malloc: Check the count before calling tcache_get()
387 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
389 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
390 [23844] nptl: pthread_rwlock_trywrlock results in hang
391 [23983] argparse: Missing compat versions of argp_failure and argp_error
392 for long double = double
393 [23984] libc: Missing compat versions of err.h and error.h functions for
395 [23996] localedata: Dutch salutations
396 [24040] libc: riscv64: unterminated call chain in __thread_start
397 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
399 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
400 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
402 [24114] regex: regexec buffer read overrun in "grep -i
403 '\(\(\)*.\)*\(\)\(\)\1'"
404 [24122] libc: Segfaults if 0 returned from la_version
405 [24153] stdio: Some input functions do not react to stdin assignment
406 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
407 RDX is set) (CVE-2019-7309)
408 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
409 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
410 not the default "nor"
411 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
412 false positives, change to modern flexible array
413 [24180] nptl: pthread_mutex_trylock does not use the correct order of
414 instructions while maintaining the robust mutex list due to missing
416 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
417 unnecessary librt dependencies
418 [24200] localedata: Revert first_weekday removal in en_IE locale
419 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
420 [24215] nptl: pthread_timedjoin_np should be a cancellation point
421 [24216] malloc: Check for large bin list corruption when inserting
423 [24228] stdio: old x86 applications that use legacy libio crash on exit
424 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
426 [24293] localedata: Missing Minguo calendar support for TW locales
427 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
429 [24307] localedata: Update locale data to Unicode 12.0.0
430 [24323] dynamic-link: dlopen should not be able open PIE objects
431 [24335] build: "Obsolete types detected" with Linux 5.0 headers
432 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
434 [24370] localedata: Add lang_name for tt_RU locale
435 [24372] locale: Binary locale files are not architecture independent
436 [24394] time: strptime %Ey mis-parses final year of era
437 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
439 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
441 [24531] malloc: Malloc tunables give tcache assertion failures
442 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
444 [24535] localedata: Update locale data to Unicode 12.1.0
445 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
446 kernels and break testing
447 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
448 [24556] build: [GCC 9] error: â%sâ directive argument is null
449 [-Werror=format-overflow=]
450 [24570] libc: alpha: compat msgctl uses __IPC_64
451 [24584] locale: Data race in __wcsmbs_clone_conv
452 [24588] stdio: Remove codecvt vtables from libio
453 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
455 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
456 [24632] stdio: Old binaries which use freopen with default stdio handles
458 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
460 [24652] localedata: szl_PL spelling correction
461 [24695] nss: nss_db: calling getpwent after endpwent crashes
462 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
463 in /etc/nsswitch.conf
464 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
465 [24740] libc: getdents64 type confusion
466 [24741] dynamic-link: ld.so should not require that a versioned symbol is
467 always implemented in the same library
468 [24744] libc: Remove copy_file_range emulation
469 [24757] malloc: memusagestat is linked against system libpthread
470 [24794] libc: Partial test suite run builds corrupt test-in-container
478 * The getcpu wrapper function has been added, which returns the currently
479 used CPU and NUMA node. This function is Linux-specific.
481 * A new convenience target has been added for distribution maintainers
482 to build and install all locales as directories with files. The new
483 target is run by issuing the following command in your build tree:
484 'make localedata/install-locale-files', with an optional DESTDIR
485 to set the install root if you wish to install into a non-default
488 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
490 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
491 for _GNU_SOURCE, to match BSD environments.
493 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
494 indicates that it will abort the transaction prior to entering the kernel
495 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
496 suspended, and this caused some undefined side-effects issues by aborting
497 transactions manually. Glibc avoided it by abort transactions manually on
498 each syscall, but it lead to performance issues on newer kernels where the
499 HTM state is saved and restore lazily (the state being saved even when the
500 process actually does not use HTM).
502 * The functions posix_spawn_file_actions_addchdir_np and
503 posix_spawn_file_actions_addfchdir_np have been added, enabling
504 posix_spawn and posix_spawnp to run the new process in a different
505 directory. These functions are GNU extensions. The function
506 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
509 * The popen and system do not run atfork handlers anymore (BZ#17490).
510 Although it is a possible POSIX violation, the POSIX rationale in
511 pthread_atfork documentation regarding atfork handlers is to handle
512 inconsistent mutex state after a fork call in a multi-threaded process.
513 In both popen and system there is no direct access to user-defined mutexes.
515 * Support for the C-SKY ABIV2 running on Linux has been added. This port
516 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
518 - C-SKY ABIV2 soft-float little-endian
519 - C-SKY ABIV2 hard-float little-endian
521 * strftime's default formatting of a locale's alternative year (%Ey)
522 has been changed to zero-pad the year to a minimum of two digits,
523 like "%y". This improves the display of Japanese era years during
524 the first nine years of a new era, and is expected to be harmless
525 for all other locales (only Japanese locales regularly have
526 alternative year numbers less than 10). Zero-padding can be
527 overridden with the '_' or '-' flags (which are GNU extensions).
529 * As a GNU extension, the '_' and '-' flags can now be applied to
530 "%EY" to control how the year number is formatted; they have the
531 same effect that they would on "%Ey".
533 Deprecated and removed features, and other changes affecting compatibility:
535 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
536 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
538 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
539 in <sys/procfs.h>, has been corrected to match the type actually used by
540 the Linux kernel. This affects the size and layout of that structure on
541 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
543 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
544 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
545 defined in <sys/procfs.h>, has been corrected to match the type actually
546 used by the Linux kernel. This affects the size and layout of those
549 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
550 meant to scan a string and allocate space for it with malloc, is now
551 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
552 defined. This extension conflicts with C99's use of '%a' to scan a
553 hexadecimal floating-point number, which is now available to programs
554 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
556 POSIX.1-2008 includes the feature of allocating a buffer for string input
557 with malloc, using the modifier letter 'm' instead. Programs using
558 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
559 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
560 C99 '%a' no longer need to avoid _GNU_SOURCE.
562 GCC's -Wformat warnings can detect most uses of this extension, as long
563 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
564 __attribute__ ((format (scanf, ...))).
566 Changes to build and runtime requirements:
568 * Python 3.4 or later is required to build the GNU C Library.
570 * On most architectures, GCC 5 or later is required to build the GNU C
571 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
573 Older GCC versions and non-GNU compilers are still supported when
574 compiling programs that use the GNU C Library.
576 Security related changes:
578 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
579 denial of service due to resource exhaustion when processing getaddrinfo
580 calls with crafted host names. Reported by Guido Vranken.
582 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
583 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
584 happened, accessing the 32-bit size_t value as the full 64-bit register
585 in the assembly string/memory functions would cause a buffer overflow.
588 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
589 addresses with arbitrary trailing characters, potentially leading to data
590 or command injection issues in applications.
592 The following bugs are resolved with this release:
594 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
595 [10496] localedata: 12h time representation in multiple locales faulty
596 [10797] localedata: it_IT locale numeric does not have a separator for
598 [11319] libc: dprintf doesn't handle errors properly
599 [16346] time: mktime: potentially unsafe use of localtime_offset
600 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
602 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
603 posix_spawn_file_actions_addfchdir_np
604 [17426] localedata: Indian locales: set the correct date format
605 [17490] stdio: popen should not invoke atfork handlers
606 [17783] libc: TIOCSER_TEMT conditions inconsistent
607 [18040] regex: use-after-free in regexec/get_subexp
608 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
609 [20018] network: getaddrinfo should reject IP addresses with trailing
610 characters (CVE-2016-10739)
611 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
612 [20271] libc: Missing "\n" in __libc_fatal calls
613 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
614 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
615 pointer argument is non-NULL
616 [21037] stdio: open_memstream and freopen
617 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
618 [21716] time: Crash in glibc's mktime in low-memory situations
619 [22834] stdio: Subprocess forked by popen may crash in Linux when
620 multithreads call popen
621 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
622 and pthread_create fails.
623 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
624 [23125] libc: riscv64: endless loop when throwing an exception from a
626 [23275] nptl: Race in pthread_mutex_lock while promoting to
627 PTHREAD_MUTEX_ELISION_NP.
628 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
630 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
632 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
634 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
635 [23509] dynamic-link: CET enabled glibc is incompatible with the older
637 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
638 [23521] nss: get_next_alias nss_files file stream leak
639 [23538] nptl: Hang in pthread_cond_broadcast
640 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
641 [23578] regex: Invalid memory access if regex pattern contains NUL byte
642 [23579] libc: Errors misreported in preadv2
643 [23597] build: support/test-container.c doesn't work with different
645 [23603] time: mktime signed integer overflow on large timestamps
646 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
647 [23614] libc: powerpc: missing CFI register information in __mpn_*
649 [23637] string: Generic strstr/strcasestr fails with huge needles
650 [23640] libc: no way to easily clear FD_CLOEXEC in
651 posix_spawn_file_actions_adddup2()
652 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
654 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
656 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
657 [23689] libc: Bug in documentation for rusage.ru_ixrss in
658 bits/types/struct_rusage.h
659 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
661 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
663 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
664 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
665 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
667 [23724] localedata: Albanian date formats are incorrect
668 [23735] math: libnldbl_nonshared.a references internal libm symbols
669 [23740] localedata: kl_GL: Month names and date formats need update
670 [23744] regex: regex refactorings to remove BE, avoid duplication
671 [23745] time: mktime fix for Gnulib + coreutils
672 [23758] time: Improve the width of alternate representation for year in
674 [23783] libc: [mips] Missing CMSPAR bits/termios.h
675 [23789] time: mktime does not set errno on failure
676 [23791] localedata: Wrong monetary format for ca_ES locale
677 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
678 [23794] locale: c16rtomb does not handle surrogate pairs
679 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
680 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
681 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
682 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
683 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
684 [23862] libc: [sh] missing kernel-features.h undefines
685 [23864] libc: [riscv] missing kernel-features.h undefines
686 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
687 [23907] malloc: Incorrect double-free malloc tcache check disregards
689 [23913] libc: off-by-one in function maybe_script_execute in
690 sysdeps/posix/spawni.c
691 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
692 [23923] locale: Add --no-hard-links option to localedef
693 [23927] network: Linux if_nametoindex() does not close descriptor
695 [23961] math: powf can overflow to inf without setting errno in non-
696 nearest rounding mode
697 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
698 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
699 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
700 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
701 [24011] localedata: Fixed small type in comment for locale bs_BA
702 [24018] libc: gettext() may return NULL
703 [24022] build: riscv build failure with Linux kernel 4.20-rc7
704 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
705 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
707 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
708 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
710 [24046] localedata: en_US locale doesn't define date_fmt
711 [24063] manual: @var{errno} should be @code{errno}
712 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
713 [24088] libc: VSCR field is not being correctly read in ucontext_t on
715 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
717 [24097] string: Can't use 64-bit register for size_t in assembly codes for
719 [24110] hurd: SS_DISABLE never set in stack_t value returned by
721 [24112] network: Do not send DNS queries for non-host names (where all
722 answers will be rejected)
723 [24130] libc: alpha __remqu corrupts $f3 register
730 * The localization data for ISO 14651 is updated to match the 2016
731 Edition 4 release of the standard, this matches data provided by
732 Unicode 9.0.0. This update introduces significant improvements to the
733 collation of Unicode characters. This release deviates slightly from
734 the standard in that the collation element ordering for lowercase and
735 uppercase LATIN script characters is adjusted to ensure that regular
736 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
737 is not matched by [a-z]. With the update many locales have been
738 updated to take advantage of the new collation information. The new
739 collation information has increased the size of the compiled locale
740 archive or binary locales.
742 * The GNU C Library can now be compiled with support for Intel CET, AKA
743 Intel Control-flow Enforcement Technology. When the library is built
744 with --enable-cet, the resulting glibc is protected with indirect
745 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
746 compatible with all existing executables and shared libraries. This
747 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
748 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
749 capable of multi-byte NOPs, like x86-64 processors as well as Intel
750 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
751 x86_64 and x32 on non-CET processors. --enable-cet has been tested
752 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
755 * The GNU C Library now has correct support for ABSOLUTE symbols
756 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
757 relocated incorrectly or in some cases discarded. The GNU linker can
758 make use of the newer semantics, but it must communicate it to the
759 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
760 field) to indicate such support is required.
762 * Unicode 11.0.0 Support: Character encoding, character type info, and
763 transliteration tables are all updated to Unicode 11.0.0, using
764 generator scripts contributed by Mike FABIAN (Red Hat).
766 * <math.h> functions that round their results to a narrower type are added
767 from TS 18661-1:2014 and TS 18661-3:2015:
769 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
772 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
775 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
778 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
781 * Two grammatical forms of month names are now supported for the following
782 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
783 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
784 support two grammatical forms in abbreviated month names: Catalan, Greek,
787 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
788 include the support for two grammatical forms of month names.
790 * Building and running on GNU/Hurd systems now works without out-of-tree
793 * The renameat2 function has been added, a variant of the renameat function
794 which has a flags argument. If the flags are zero, the renameat2 function
795 acts like renameat. If the flag is not zero and there is no kernel
796 support for renameat2, the function will fail with an errno value of
797 EINVAL. This is different from the existing gnulib function renameatu,
798 which performs a plain rename operation in case of a RENAME_NOREPLACE
799 flags and a non-existing destination (and therefore has a race condition
800 that can clobber the destination inadvertently).
802 * The statx function has been added, a variant of the fstatat64
803 function with an additional flags argument. If there is no direct
804 kernel support for statx, glibc provides basic stat support based on
805 the fstatat64 function.
807 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
808 library if installed. libidn2 version 2.0.5 or later is recommended. If
809 libidn2 is not available, internationalized domain names are not encoded
810 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
811 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
812 with an encoding error.) Flags which used to change the IDN encoding and
813 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
814 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
815 deprecated. They no longer have any effect.
817 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
818 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
819 range of ELF gABI expressions including such constructs as
820 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
821 have been further restricted, and where in the past a dynamic string
822 token sequence may have been interpreted as a literal string it will
823 now cause a load failure. These load failures were always considered
824 unspecified behaviour from the perspective of the dynamic loader, and
825 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
826 results in a load failure now.
828 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
829 implementation includes all the standard functions provided by
832 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
833 thrd_detach, thrd_exit, and thrd_join for thread management.
835 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
836 mtx_destroy for mutual exclusion.
838 - call_once for function call synchronization.
840 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
841 cnd_wait for conditional variables.
843 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
845 Application developers must link against libpthread to use ISO C threads.
847 Deprecated and removed features, and other changes affecting compatibility:
849 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
850 installed. Software that was using either header should be updated to
851 use standard <stdio.h> interfaces instead.
853 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
854 This was never required by the C standard, and the macros just expanded
855 to call alternative names for the same functions. If you hoped getc and
856 putc would provide performance improvements over fgetc and fputc, instead
857 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
858 necessary, flockfile and funlockfile.
860 * All stdio functions now treat end-of-file as a sticky condition. If you
861 read from a file until EOF, and then the file is enlarged by another
862 process, you must call clearerr or another function with the same effect
863 (e.g. fseek, rewind) before you can read the additional data. This
864 corrects a longstanding C99 conformance bug. It is most likely to affect
865 programs that use stdio to read interactive input from a terminal.
868 * The macros 'major', 'minor', and 'makedev' are now only available from
869 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
870 headers that happen to include <sys/types.h>. These macros are rarely
871 used, not part of POSIX nor XSI, and their names frequently collide with
872 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
875 <sys/sysmacros.h> is a GNU extension. Portable programs that require
876 these macros should first include <sys/types.h>, and then include
877 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
879 * The tilegx*-*-linux-gnu configurations are no longer supported.
881 * The obsolete function ustat is no longer available to newly linked
882 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
883 function has been deprecated in favor of fstatfs and statfs.
885 * The obsolete function nfsservctl is no longer available to newly linked
886 binaries. This function was specific to systems using the Linux kernel
887 and could not usefully be used with the GNU C Library on systems with
888 version 3.1 or later of the Linux kernel.
890 * The obsolete function name llseek is no longer available to newly linked
891 binaries. This function was specific to systems using the Linux kernel
892 and was not declared in a header. Programs should use the lseek64 name
893 for this function instead.
895 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
896 getaddrinfo and getnameinfo functions have been deprecated. The behavior
897 previously selected by them is now always enabled.
899 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
900 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
901 restriction (rejecting '_' in host names, among other things) has been
902 removed, for increased compatibility with non-IDN name resolution.
904 * The fcntl function now have a Long File Support variant named fcntl64. It
905 is added to fix some Linux Open File Description (OFD) locks usage on non
906 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
907 fcntl and LFS support is handled transparently. Also for Linux, the OFD
908 locks act as a cancellation entrypoint.
910 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
911 ecb_crypt, and des_setparity are no longer available to newly linked
912 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
913 longer installed. These functions encrypted and decrypted data with the
914 DES block cipher, which is no longer considered secure. Software that
915 still uses these functions should switch to a modern cryptography library,
918 * Reflecting the removal of the encrypt and setkey functions above, the
919 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
920 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
923 * The obsolete function fcrypt is no longer available to newly linked
924 binaries. It was just another name for the standard function crypt,
925 and it has not appeared in any header file in many years.
927 * We have tentative plans to hand off maintenance of the passphrase-hashing
928 library, libcrypt, to a separate development project that will, we hope,
929 keep up better with new passphrase-hashing algorithms. We will continue
930 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
931 'crypt_r' should not need to change at all; however, distributions will
932 need to install <crypt.h> and libcrypt from a separate project.
934 In this release, if the configure option --disable-crypt is used, glibc
935 will not install <crypt.h> or libcrypt, making room for the separate
936 project's versions of these files. The plan is to make this the default
937 behavior in a future release.
939 Changes to build and runtime requirements:
941 GNU make 4.0 or later is now required to build glibc.
943 Security related changes:
945 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
946 been fixed by removing the glibc-internal IDNA implementation and using
947 the system-provided libidn2 library instead. Originally reported by Hanno
948 Böck and Christian Weisgerber.
950 CVE-2017-18269: An SSE2-based memmove implementation for the i386
951 architecture could corrupt memory. Reported by Max Horn.
953 CVE-2018-11236: Very long pathname arguments to realpath function could
954 result in an integer overflow and buffer overflow. Reported by Alexey
957 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
958 architecture could write beyond the target buffer, resulting in a buffer
959 overflow. Reported by Andreas Schwab.
961 The following bugs are resolved with this release:
963 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
964 [6889] manual: 'PWD' mentioned but not specified
965 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
966 when __WORDSIZE != 64
967 [13762] regex: re_search etc. should return -2 on memory exhaustion
968 [13888] build: /tmp usage during testing
969 [13932] math: dbl-64 pow unexpectedly slow for some inputs
970 [14092] nptl: Support C11 threads
971 [14095] localedata: Review / update collation data from Unicode / ISO
973 [14508] libc: -Wformat warnings
974 [14553] libc: Namespace pollution loff_t in sys/types.h
975 [14890] libc: Make NT_PRFPREG canonical.
976 [15105] libc: Extra PLT references with -Os
977 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
979 [16335] manual: Feature test macro documentation incomplete and out of
981 [16552] libc: Unify umount implementations in terms of umount2
982 [17082] libc: htons et al.: statement-expressions prevent use on global
983 scope with -O1 and higher
984 [17343] libc: Signed integer overflow in /stdlib/random_r.c
985 [17438] localedata: pt_BR: wrong d_fmt delimiter
986 [17662] libc: please implement binding for the new renameat2 syscall
987 [17721] libc: __restrict defined as /* Ignore */ even in c11
988 [17979] libc: inconsistency between uchar.h and stdint.h
989 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
990 [18023] libc: extend_alloca is broken (questionable pointer comparison,
991 horrible machine code)
992 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
994 [18471] libc: llseek should be a compat symbol
995 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
997 [18991] nss: nss_files skips large entry in database
998 [19239] libc: Including stdlib.h ends up with macros major and minor being
1000 [19463] libc: linknamespace failures when compiled with -Os
1001 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1002 [19527] locale: Normalized charset name not recognized by setlocale
1003 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1004 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1006 [19728] network: out of bounds stack read in libidn function
1007 idna_to_ascii_4i (CVE-2016-6261)
1008 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1009 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1010 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1012 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1013 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1014 [20419] dynamic-link: files with large allocated notes crash in
1016 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1017 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1018 [20980] manual: CFLAGS environment variable replaces vital options
1019 [21163] regex: Assertion failure in pop_fail_stack when executing a
1020 malformed regexp (CVE-2015-8985)
1021 [21234] manual: use of CFLAGS makes glibc detect no optimization
1022 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1023 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1024 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1025 [21508] locale: intl/tst-gettext failure with latest msgfmt
1026 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1027 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1028 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1030 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1032 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1033 [22247] network: Integer overflow in the decode_digit function in
1034 puny_decode.c in libidn (CVE-2017-14062)
1035 [22342] nscd: NSCD not properly caching netgroup
1036 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1037 [22550] localedata: es_ES locale (and other es_* locales): collation
1038 should treat ñ as a primary different character, sync the collation
1039 for Spanish with CLDR
1040 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1041 by gcc configured with --enable-default-pie
1042 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1043 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1044 crossing 2GB threshold (CVE-2017-18269)
1045 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1047 [22735] time: Misleading typo in time.h source comment regarding
1049 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1050 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1051 `__assert_perror_fail ()' to `__assert_fail_base ()'
1052 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1054 [22786] libc: Stack buffer overflow in realpath() if input size is close
1055 to SSIZE_MAX (CVE-2018-11236)
1056 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1057 through an absolute DT_NEEDED path
1058 [22792] build: tcb-offsets.h dependency dropped
1059 [22797] libc: pkey_get() uses non-reserved name of argument
1060 [22807] libc: PTRACE_* constants missing for powerpc
1061 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1062 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1063 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1064 [22848] localedata: ca_ES: update date definitions from CLDR
1065 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1066 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1067 [22896] localedata: Update locale data for an_ES
1068 [22902] math: float128 test failures with GCC 8
1069 [22918] libc: multiple common of `__nss_shadow_database'
1070 [22919] libc: sparc32: backtrace yields infinite backtrace with
1072 [22926] libc: FTBFS on powerpcspe
1073 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1075 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1076 [22947] libc: FAIL: misc/tst-preadvwritev2
1077 [22963] localedata: cs_CZ: Add alternative month names
1078 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1079 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1080 [22998] dynamic-link: execstack tests are disabled when SELinux is
1082 [23005] network: Crash in __res_context_send after memory allocation
1084 [23007] math: strtod cannot handle -nan
1085 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1086 [23036] regex: regex equivalence class regression
1087 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1088 [23069] libc: sigaction broken on riscv64-linux-gnu
1089 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1090 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1091 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1092 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1093 and libc build with -Os)
1094 [23140] localedata: More languages need two forms of month names
1095 [23145] libc: _init/_fini aren't marked as hidden
1096 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1097 [23171] math: C++ iseqsig for long double converts arguments to double
1098 [23178] nscd: sudo will fail when it is run in concurrent with commands
1099 that changes /etc/passwd
1100 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1102 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1103 [23208] localedata: New locale - Lower Sorbian (dsb)
1104 [23233] regex: Memory leak in build_charclass_op function in file
1106 [23236] stdio: Harden function pointers in _IO_str_fields
1107 [23250] nptl: Offset of __private_ss differs from GCC
1108 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1109 -mtune=generic -mfpmath=sse
1110 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1112 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1113 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1115 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1116 [23277] math: nan function should not have const attribute
1117 [23279] math: scanf and strtod wrong for some hex floating-point
1118 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1120 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1121 [23303] build: undefined reference to symbol
1122 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1123 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1125 [23313] stdio: libio vtables validation and standard file object
1127 [23329] libc: The __libc_freeres infrastructure is not properly run across
1129 [23349] libc: Various glibc headers no longer compatible with
1131 [23351] malloc: Remove unused code related to heap dumps and malloc
1133 [23363] stdio: stdio-common/tst-printf.c has non-free license
1134 [23396] regex: Regex equivalence regression in single-byte locales
1135 [23422] localedata: oc_FR: More updates of locale data
1136 [23442] build: New warning with GCC 8
1137 [23448] libc: Out of bounds access in IBM-1390 converter
1138 [23456] libc: Wrong index_cpu_LZCNT
1139 [23458] build: tst-get-cpu-features-static isn't added to tests
1140 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1142 [23467] dynamic-link: x86/CET: A property note parser bug
1149 * The GNU C Library can now be compiled with support for building static
1150 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1151 executables are like static executables but can be loaded at any address
1152 and provide additional security hardening benefits at the cost of some
1153 memory and performance. When the library is built with --enable-static-pie
1154 the resulting libc.a is usable with GCC 8 and above to create static PIE
1155 executables using the GCC option '-static-pie'. This feature is currently
1156 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1157 aarch64 with binutils 2.30 or later.
1159 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1160 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1163 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1165 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1167 * In order to support faster and safer process termination the malloc API
1168 family of functions will no longer print a failure address and stack
1169 backtrace after detecting heap corruption. The goal is to minimize the
1170 amount of work done after corruption is detected and to avoid potential
1171 security issues in continued process execution. Reducing shutdown time
1172 leads to lower overall process restart latency, so there is benefit both
1173 from a security and performance perspective.
1175 * The abort function terminates the process immediately, without flushing
1176 stdio streams. Previous glibc versions used to flush streams, resulting
1177 in deadlocks and further data corruption. This change also affects
1178 process aborts as the result of assertion failures.
1180 * On platforms where long double has the IEEE binary128 format (aarch64,
1181 alpha, mips64, riscv, s390 and sparc), the math library now implements
1182 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1183 These are the same interfaces added in version 2.26 for some platforms where
1184 this format is supported but is not the format of long double.
1186 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1187 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1188 implements interfaces for that type, as defined by ISO/IEC TS
1189 18661-3:2015. These are corresponding interfaces to those supported for
1192 * The math library now implements interfaces for the _Float32, _Float64 and
1193 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1194 corresponding interfaces to those supported for _Float128.
1196 * glibc now implements the memfd_create and mlock2 functions on Linux.
1198 * Support for memory protection keys was added. The <sys/mman.h> header now
1199 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1202 * The copy_file_range function was added.
1204 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1206 * The ldconfig utility now processes `include' directives using the C/POSIX
1207 collation ordering. Previous glibc versions used locale-specific
1208 ordering, the change might break systems that relied on that.
1210 * Support for two grammatical forms of month names has been added.
1211 In a call to strftime, the "%B" and "%b" format specifiers will now
1212 produce the grammatical form required when the month is used as part
1213 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1214 required when the month is named by itself. For instance, in Greek
1215 and in many Slavic and Baltic languages, "%B" will produce the month
1216 in genitive case, and "%OB" will produce the month in nominative case.
1218 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1219 are all valid and will all accept any known form of month
1220 name---standalone or complete, abbreviated or full. In a call to
1221 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1222 the strings used by "%B" and "%b", respectively. New query
1223 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1224 used by "%OB" and "%Ob", respectively.
1226 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1227 define the strings for %OB and %Ob, respectively; these have the
1228 same syntax as "mon" and "abmon". These arrays are optional; if they
1229 are not provided then they have the same content as "mon" and "abmon",
1232 These features are provided for locales which define "alt_mon" and/or
1233 "ab_alt_mon" in their locale source data. This release includes such
1234 alternative month name data for the following languages: Belarusian,
1235 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1237 This feature is currently a GNU extension, but it is expected to
1238 be added to the next revision of POSIX, and it is also already
1239 available on some BSD-derived operating systems.
1241 This feature will cause existing statically compiled applications
1242 to fail to load locales and fall back to the builtin C/POSIX locales.
1243 See notes below for other changes affecting compatibility.
1245 * Support for the RISC-V ISA running on Linux has been added. This port
1246 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1247 for the following ISA and ABI pairs:
1253 Deprecated and removed features, and other changes affecting compatibility:
1255 * Statically compiled applications attempting to load locales compiled for the
1256 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1257 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1258 support for two grammatical forms of the month names, also extends the locale
1259 data binary format. Static applications needing locale support must be
1260 recompiled to match the runtime and data they are deployed with. In some
1261 distributions there is an upgrade window where dynamically linked applications
1262 may use a new library but the old locale data and also fall back to the
1263 builtin C/POSIX locales; restarting the application process is sufficient to
1266 * Support for statically linked applications which call dlopen is deprecated
1267 and will be removed in a future version of glibc. Applications which call
1268 dlopen need to be linked dynamically instead.
1270 * Support for old programs which use internal stdio data structures and
1271 functions is deprecated. This includes programs which use the C++ streams
1272 provided by libstdc++ in GCC 2.95. Programs which use the internal
1273 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1274 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1275 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1276 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1277 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1278 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1279 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1280 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1281 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1282 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1283 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1284 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1285 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1286 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1287 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1288 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1289 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1290 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1291 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1292 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1293 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1294 future version of glibc. Unlike other symbol removals, these old
1295 applications will not be supported using compatibility symbols.
1297 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1298 defined by <sys/ptrace.h>.
1300 * libm no longer supports SVID error handling (calling a user-provided
1301 matherr function on error) or the _LIB_VERSION variable to control error
1302 handling. (SVID error handling and the _LIB_VERSION variable still work
1303 for binaries linked against older versions of the GNU C Library.) The
1304 libieee.a library is no longer provided. math.h no longer defines struct
1305 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1306 TLOSS, PLOSS and HUGE.
1308 * The libm functions pow10, pow10f and pow10l are no longer supported for
1309 new programs. Programs should use the standard names exp10, exp10f and
1310 exp10l for these functions instead.
1312 * The mcontext_t type is no longer the same as struct sigcontext. On
1313 platforms where it was previously the same, this changes the C++ name
1314 mangling for interfaces involving this type.
1316 * The add-ons mechanism for building additional packages at the same time as
1317 glibc has been removed. The --enable-add-ons configure option is now
1320 * The --without-fp configure option is now ignored. Whether hardware
1321 floating-point instructions are used is now configured based on whether
1322 the compiler used at configure time (without any options implied by a
1323 --with-cpu= configure option) uses such instructions.
1325 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1326 the specified string can be parsed as a domain name.
1328 * In the malloc_info output, the <heap> element may contain another <aspace>
1329 element, "subheaps", which contains the number of sub-heaps.
1331 * The libresolv function p_secstodate is no longer supported for new
1334 * The tilepro-*-linux-gnu configuration is no longer supported.
1336 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1337 and will be removed in a future release. Software that is still using
1338 either header should be updated to use standard <stdio.h> interfaces
1341 libio.h was originally the header for a set of supported GNU extensions,
1342 but they have not been maintained as such in many years, they are now
1343 standing in the way of improvements to stdio, and we don't think there are
1344 any remaining external users. _G_config.h was never intended for public
1345 use, but predates the bits convention.
1347 Changes to build and runtime requirements:
1349 * bison version 2.7 or later is required to generate code in the 'intl'
1352 Security related changes:
1354 CVE-2009-5064: The ldd script would sometimes run the program under
1355 examination directly, without preventing code execution through the
1356 dynamic linker. (The glibc project disputes that this is a security
1357 vulnerability; only trusted binaries must be examined using the ldd
1360 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1361 suffered from a one-byte overflow during ~ operator processing (either
1362 on the stack or the heap, depending on the length of the user name).
1363 Reported by Tim RĂŒhsen.
1365 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1366 would sometimes fail to free memory allocated during ~ operator
1367 processing, leading to a memory leak and, potentially, to a denial
1370 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1371 without GLOB_NOESCAPE, could write past the end of a buffer while
1372 unescaping user names. Reported by Tim RĂŒhsen.
1374 CVE-2017-17426: The malloc function, when called with an object size near
1375 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1376 instead of NULL. This was a regression introduced with the new malloc
1377 thread cache in glibc 2.26. Reported by Iain Buclaw.
1379 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1380 to the allocation of too much memory. (This is not a security bug per se,
1381 it is mentioned here only because of the CVE assignment.) Reported by
1384 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1385 of the number of search path components. (This is not a security
1386 vulnerability per se because no trust boundary is crossed if the fix for
1387 CVE-2017-1000366 has been applied, but it is mentioned here only because
1388 of the CVE assignment.) Reported by Qualys.
1390 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1391 for AT_SECURE or SUID binaries could be used to load libraries from the
1394 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1395 succeeds without returning an absolute path due to unexpected behaviour
1396 of the Linux kernel getcwd syscall. Reported by halfdog.
1398 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1399 an object size near the value of SIZE_MAX, would return a pointer to a
1400 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1402 CVE-2018-6551: The malloc function, when called with an object size near
1403 the value of SIZE_MAX, would return a pointer to a buffer which is too
1404 small, instead of NULL.
1406 The following bugs are resolved with this release:
1408 [866] glob: glob should match dangling symlinks
1409 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1410 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1412 [5997] math: Very slow execution of sinf function
1413 [10580] localedata: hr_HR: updated locale
1414 [10871] locale: 'mon' array should contain both nominative and genitive
1416 [12349] localedata: eu_ES: incorrect thousands separator
1417 [13605] localedata: shn_MM: new Shan locale
1418 [13805] localedata: ru_RU: currency should use ',' as radix point
1419 [13953] localedata: km_KH: locale update
1420 [13994] localedata: mjw_IN: new locale
1421 [14121] build: make writes .mo files in po directory
1422 [14333] libc: Fix the race between atexit() and exit()
1423 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1424 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1426 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1427 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1428 width Latin characters
1429 [15332] localedata: es_CU: locale update
1430 [15436] stdio: Don't close or flush stdio streams on abort
1431 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1433 [16148] localedata: ca_ES: incorrect thousands separator
1434 [16750] dynamic-link: ldd should not try to execute the binaries
1436 [16777] localedata: pl_PL: incorrect thousands separator in locale
1437 [16905] localedata: hanzi: new collation
1438 [17563] localedata: cmn_TW: add hanzi collation
1439 [17750] localedata: wrong collation order of diacritics in most locales
1440 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1442 [17956] build: Build fails on missing definitions from header file
1443 nss/nss.h when Mozilla NSS is used for cryptography
1444 [18203] libc: realpath() does not handle unreachable paths correctly
1445 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1446 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1447 [18822] libc: Internal functions are called via PLT
1448 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1449 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1450 [19574] libc: glibc should support building static PIE binaries
1451 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1453 [19971] glob: glob: Do not skip entries with zero d_ino values
1454 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1455 [20008] localedata: km_KH: convert to translit_neutral
1456 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1457 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1458 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1459 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1460 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1462 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1463 they're set, wrong errors returned by gaih_inet when lookup functions
1465 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1466 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1468 [20952] localedata: yuw_PG: new locale
1469 [21084] localedata: charmaps/IBM858: new codepage
1470 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1471 [21242] libc: assert gives pedantic warning in old gcc versions
1472 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1473 __regcall calling convention
1474 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1475 [21326] libc: C99 functions are not declared for C++11 and later if
1476 _GNU_SOURCE is not predefined by g++
1477 [21457] libc: sys/ucontext.h namespace
1478 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1479 [21660] math: GCC fails to compile a formula with tgmath.h
1480 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1481 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1482 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1483 [21684] math: tgmath.h handling of complex integers
1484 [21685] math: tgmath.h handling of bit-fields
1485 [21686] math: tgmath.h handling of __int128
1486 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1488 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1490 [21750] localedata: column width of characters incompatible with classical
1492 [21754] malloc: malloc: Perform as little work as possible after heap
1493 consistency check failures
1494 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1495 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1496 [21791] string: Unused XXX_chk_XXX functions in libc.a
1497 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1499 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1501 [21845] localedata: Added new Locale bho_NP
1502 [21853] localedata: Fix abday Which looks same as day in zh_SG
1503 [21854] localedata: Added New Locale en_SC
1504 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1505 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1506 _dl_runtime_resolve_avx_slow
1507 [21885] network: getaddrinfo: gethosts does not release resolver context
1508 on memory allocation failure
1509 [21899] libc: XPG4.2 sigaction namespace
1510 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1512 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1514 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1515 errno value, causing getaddrinfo to fail
1516 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1517 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1518 instead of EAI_NODATA
1519 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1520 constant PTRACE_SEIZE_DEVEL
1521 [21930] math: C-only gcc builtins used in <math.h> isinf
1522 [21932] network: Unpaired __resolv_context_get in generic get*_r
1524 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1525 [21944] libc: sigval namespace
1526 [21951] localedata: Update hanzi collation by stroke
1527 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1528 sysdeps/x86_64/fpu/e_expf.S
1529 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1530 allocation in syscall loops)
1531 [21959] localedata: Fix Country name for xh_ZA
1532 [21960] localedata: Fix abmon for bem_ZM
1533 [21966] math: AVX2 mathvec functions use FMA without checking
1534 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1535 [21971] localedata: Added New Locale for mfe_MU
1536 [21972] libc: assert macro requires operator== (int) for its argument type
1537 [21973] math: [sparc] libm missing sqrtl compat symbol
1538 [21974] libc: Remove __bb_init_func and __bb_exit_func
1539 [21982] string: stratcliff.c: error: assuming signed overflow does not
1541 [21986] stdio: __guess_grouping is called incorrectly
1542 [21987] math: [sparc32] wrong bits/long-double.h installed
1543 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1545 [22022] localedata: Missing country_name for mni_IN
1546 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1548 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1550 [22026] locale: iconv_open: heap overflow on gconv_init failure
1551 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1552 [22035] math: [m68k] bits/math-inline.h macro namespace
1553 [22038] localedata: Fix abbreviated weeks and months for Somali
1554 [22044] localedata: Remove redundant data for Limburgish Language
1555 [22050] malloc: Linking with -lmcheck does not hook
1556 __malloc_initialize_hook correctly
1557 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1558 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1559 [22070] localedata: charmaps/UTF-8: wcwidth for
1560 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1561 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1562 Jungseong and Jongseong) should be 0
1563 [22078] nss: nss_files performance issue in multi mode
1564 [22082] math: bits/math-finite.h exp10 condition
1565 [22086] libc: pcprofiledump incorrect cross-endian condition
1566 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1567 [22095] network: Name server address allocation memory leak in resolv.conf
1569 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1571 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1572 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1574 [22111] malloc: malloc: per thread cache is not returned when thread exits
1575 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1576 [22134] libc: [linux] implement fexecve with execveat
1577 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1579 [22145] libc: ttyname() gives up too early in the face of namespaces
1580 [22146] math: C++ build issue with float128 on x86_64
1581 [22153] nptl: nptl: save error code before process termination
1582 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1583 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1584 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1585 [22165] libc: [hppa] Text relocations in libc.so
1586 [22180] libc: destructor registered via __cxa_atexit is called twice
1587 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1588 symlinks") cause "make" segfaults
1589 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1591 [22207] libc: FAIL: stdlib/test-atexit-race
1592 [22225] math: nearbyint arithmetic moved before feholdexcept
1593 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1594 [22235] math: iscanonical in C++ and float128
1595 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1596 the svid compat wrapper
1597 [22244] math: ynf and yn are wrong without the svid compat wrapper
1598 [22273] libc: Improper assert in Linux posix_spawn implementation
1599 [22284] libc: -pg -pie doesn't work
1600 [22292] locale: localedef exits with error 4 when it should be error 1
1601 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1602 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1604 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1605 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1607 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1608 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1609 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1610 [22322] libc: [mips64] wrong bits/long-double.h installed
1611 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1612 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1614 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1615 [22343] malloc: Integer overflow in posix_memalign
1616 [22347] libc: getrandom() returns the number of bytes that were copied to
1617 the buffer even though the comments say "Return 0 on success and -1 on
1619 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1620 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1622 [22370] dynamic-link: Incorrect note padding check
1623 [22375] libc: malloc returns pointer from tcache_get when should return
1624 NULL (CVE-2017-17426)
1625 [22377] math: iseqsig, float128 and C++
1626 [22382] localedata: Error in tpi_PG locale
1627 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1628 inside the ASCII printable range
1629 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1631 [22403] localedata: Slash needs escaping in some locales
1632 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1633 [22409] network: res_hnok does not accept some host names used on the
1635 [22412] network: res_dnok, res_hnok should perform syntax checks
1636 [22413] network: ns_name_pton ignores syntactically invalid trailing
1638 [22415] stdio: setvbuf can lead to invalid free/segfault
1639 [22432] build: Non-deterministic build
1640 [22439] malloc: malloc_info should compute summary statistics for all sub-
1642 [22442] network: if_nametoindex could report index for the wrong
1643 networking interface
1644 [22446] build: aliasing violation calling readlink in handle_request
1645 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1646 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1647 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1648 __nscd_hash/__nss_hash
1649 [22463] network: p_secstodate overflow handling
1650 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1651 [22478] libc: sigwait can fail with EINTR
1652 [22505] libc: ldconfig processes include directive in locale-specific
1654 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1655 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1656 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1657 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1658 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1659 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1660 same as for Croatian
1661 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1662 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1663 [22577] libc: missing newline after "cannot allocate TLS data structures
1665 [22588] manual: manual/conf.texi: missing underscore in front of
1667 [22593] math: nextafter and nexttoward are declared with const attribute
1668 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1669 [22603] string: ia64 memchr overflows internal pointer check
1670 [22605] libc: SH clone does not set the exit code correctly
1671 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1673 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1674 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1675 modified in case of success
1676 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1677 [22615] manual: manual: ambiguous wording about errno value in case of
1679 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1681 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1682 binaries or if /proc is not mounted (CVE-2017-16997)
1683 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1684 [22630] build: $(no-pie-ldflag) is no longer effective
1685 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1686 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1687 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1688 [22637] nptl: guard size is subtracted from thread stack size instead of
1690 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1691 [22657] localedata: hu_HU: Avoid double space in date
1692 [22660] math: fmax, fmin sNaN handling on alpha
1693 [22664] libc: New warning of GCC8
1694 [22665] math: alpha: ceil and floor raise inexact exceptions
1695 [22666] math: alpha: trunc raise inexact exceptions
1696 [22667] libc: makecontext lacks stack alignment on i386
1697 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1698 [22679] libc: getcwd(3) can succeed without returning an absolute path
1700 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1701 elision and tunables
1702 [22687] math: [powerpc-nofpu] complex long double functions spurious
1704 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1705 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1706 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1708 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1709 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1711 [22701] nis: Incomplete removal of libnsl
1712 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1713 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1714 [22715] dynamic-link: FAIL: elf/tst-audit10
1715 [22719] libc: Backtrace tests fail on hppa
1716 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1717 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1718 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1719 before the first call to crypt_r () in crypt/badsalttest.c
1726 * A per-thread cache has been added to malloc. Access to the cache requires
1727 no locks and therefore significantly accelerates the fast path to allocate
1728 and free small amounts of memory. Refilling an empty cache requires locking
1729 the underlying arena. Performance measurements show significant gains in a
1730 wide variety of user workloads. Workloads were captured using a special
1731 instrumented malloc and analyzed with a malloc simulator. Contributed by
1732 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1734 * Unicode 10.0.0 Support: Character encoding, character type info, and
1735 transliteration tables are all updated to Unicode 10.0.0, using
1736 generator scripts contributed by Mike FABIAN (Red Hat).
1737 These updates cause user visible changes, especially the changes in
1738 wcwidth for many emoji characters cause problems when emoji sequences
1739 are rendered with pango, see for example:
1740 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1742 * Collation of Hungarian has been overhauled and is now consistent with "The
1743 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1746 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1748 - The GNU C Library will now detect when /etc/resolv.conf has been
1749 modified and reload the changed configuration. The new resolver option
1750 âno-reloadâ (RES_NORELOAD) disables this behavior.
1752 - The GNU C Library now supports an arbitrary number of search domains
1753 (configured using the âsearchâ directive in /etc/resolv.conf);
1754 previously, there was a hard limit of six domains. For backward
1755 compatibility, applications that directly modify the â_resâ global
1756 object are still limited to six search domains.
1758 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1759 Library will now randomly pick a name server from the configuration as a
1760 starting point. (Previously, the second name server was always used.)
1762 * The tunables feature is now enabled by default. This allows users to tweak
1763 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1765 * New function reallocarray, which resizes an allocated block (like realloc)
1766 to the product of two sizes, with a guaranteed clean failure upon integer
1767 overflow in the multiplication. Originally from OpenBSD, contributed by
1768 Dennis Wölfing and RĂŒdiger Sonderfeld.
1770 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1771 These are extended versions of preadv and pwritev, respectively, taking an
1772 additional flags argument. The set of supported flags depends on the
1773 running kernel; full support currently requires kernel 4.7 or later.
1775 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1776 create a new session ID for the spawned process. This feature is
1777 scheduled to be added to the next major revision of POSIX; for the time
1778 being, it is available under _GNU_SOURCE.
1780 * errno.h is now safe to use from C-preprocessed assembly language on all
1781 supported operating systems. In this context, it will only define the
1782 Exxxx constants, as preprocessor macros expanding to integer literals.
1784 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1785 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1786 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1787 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1789 To compile programs that use this feature, the compiler must support
1790 128-bit floating point with the type name _Float128 (as defined by TS
1791 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1792 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1793 must be defined to make the new interfaces visible.
1795 The new functions and macros correspond to those present for other
1796 floating-point types (except for a few obsolescent interfaces not
1797 supported for the new type), with F128 or f128 suffixes; for example,
1798 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1799 printf or scanf formats for the new type; the strfromf128 and strtof128
1800 interfaces should be used instead.
1802 Deprecated and removed features, and other changes affecting compatibility:
1804 * The synchronization that pthread_spin_unlock performs has been changed to
1805 now be equivalent to a C11 atomic store with release memory order to the
1806 spin lock's memory location. Previously, several (but not all)
1807 architectures used stronger synchronization (e.g., containing what is
1808 often called a full barrier). This change can improve performance, but
1809 may affect odd fringe uses of spin locks that depend on the previous
1810 behavior (e.g., using spin locks as atomic variables to try to implement
1811 Dekker's mutual exclusion algorithm).
1813 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1816 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1817 will only be built and installed when the GNU C Library is configured with
1818 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1819 as TIRPC or rpcsvc-proto, to be used.
1821 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1822 libnss_compat, are deprecated, and will not be built or installed by
1825 The NIS(+) support library, libnsl, is also deprecated. By default, a
1826 compatibility shared library will be built and installed, but not headers
1827 or development libraries. Only a few NIS-related programs require this
1828 library. (In particular, the GNU C Library has never required programs
1829 that use 'gethostbyname' to be linked with libnsl.)
1831 Replacement implementations based on TIRPC, which additionally support
1832 IPv6, are available from <https://github.com/thkukuk/>. The configure
1833 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1834 name service modules, to be built and installed.
1836 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1837 support is enabled, the configured recursive resolver must support EDNS.
1838 (Responding to EDNS-enabled queries with responses which are not
1839 EDNS-enabled is fine, but FORMERR responses are not.)
1841 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1842 servers have not supported this opcode for a long time.
1844 * The _res_opcodes variable has been removed from libresolv. It had been
1845 exported by accident.
1847 * <string.h> no longer includes inline versions of any string functions,
1848 as this kind of optimization is better done by the compiler. The macros
1849 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1851 * The nonstandard header <xlocale.h> has been removed. Most programs should
1852 use <locale.h> instead. If you have a specific need for the definition of
1853 locale_t with no other declarations, please contact
1854 libc-alpha@sourceware.org and explain.
1856 * The obsolete header <sys/ultrasound.h> has been removed.
1858 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1860 * The obsolete function cfree has been removed. Applications should use
1863 * The stack_t type no longer has the name struct sigaltstack. This changes
1864 the C++ name mangling for interfaces involving this type.
1866 * The ucontext_t type no longer has the name struct ucontext. This changes
1867 the C++ name mangling for interfaces involving this type.
1869 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1870 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1871 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1872 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1873 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1874 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1875 fpregset_t type no longer has the name struct fpu. This changes the C++
1876 name mangling for interfaces involving those types.
1878 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1879 synced with the kernel:
1881 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1882 are not supported on this architecture and have been removed.
1884 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1885 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1886 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1888 Programs that assume the GET/SETREGS ptrace requests are universally
1889 available will now fail to build, instead of malfunctioning at runtime.
1891 Changes to build and runtime requirements:
1893 * Linux kernel 3.2 or later is required at runtime, on all architectures
1894 supported by that kernel. (This is a change from version 2.25 only for
1897 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1899 * On most architectures, GCC 4.9 or later is required to build the GNU C
1900 Library. On powerpc64le, GCC 6.2 or later is required.
1902 Older GCC versions and non-GNU compilers are still supported when
1903 compiling programs that use the GNU C Library. (We do not know exactly
1904 how old, and some GNU extensions to C may be _de facto_ required. If you
1905 are interested in helping us make this statement less vague, please
1906 contact libc-alpha@sourceware.org.)
1908 Security related changes:
1910 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1911 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1913 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1914 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1916 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1917 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1920 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1921 fixed (CVE-2017-12133).
1923 The following bugs are resolved with this release:
1925 [984] network: Respond to changed resolv.conf in gethostbyname
1926 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1927 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1929 [12189] libc: __stack_chk_fail should not attempt a backtrace
1931 [14096] time: Race condition on timezone/tst-timezone.out
1932 [14172] localedata: az_IR: new locale
1933 [14995] build: glibc fails to build if gold is the default linker, even if
1935 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1936 [16637] network: inet_pton function is accepting IPv6 with bad format
1937 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1938 x86 and other generic code
1939 [16875] localedata: ko_KR: fix lang_name
1940 [17225] localedata: ar_SY: localized month names for May and June are
1942 [17297] localedata: da_DK: wrong date_fmt string
1943 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1944 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1945 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1946 [19066] localedata: ar_SA abbreviated day and month names are in English
1947 [19569] network: resolv: Support an arbitrary number of search domains
1948 [19570] network: Implement random DNS server selection in the stub
1950 [19838] locale: localedef fails on PA-RISC
1951 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1952 order of 0D36 and 0D37
1953 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1955 [20098] libc: FAIL: debug/backtrace-tst on hppa
1956 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1958 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1960 [20313] localedata: Update locale data to Unicode 9.0
1961 [20424] manual: Document how to provide a malloc replacement
1962 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1964 [20686] locale: Add el_GR@euro to SUPPORTED.
1965 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1966 failures consistently
1967 [21015] dynamic-link: Document and fix --enable-bind-now
1968 [21016] nptl: pthread_cond support is broken on hppa
1969 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1970 frame-pointer on i386
1971 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1973 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1974 [21088] libc: Build fails with --enable-static-nss
1975 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1976 generic c code is used
1977 [21109] libc: Tunables broken on big-endian
1978 [21112] math: powf has large ulp errors with base close to 1 and exponent
1980 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1982 [21120] malloc: glibc malloc is incompatible with GCC 7
1983 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1985 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1986 (-0.0) when linking with -lieee
1987 [21171] math: log10, log2 and lgamma return incorrect results
1988 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1989 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1990 [21207] localedata: ce_RU: update weekdays from CLDR
1991 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1992 [21217] localedata: Update months from CLDR-31
1993 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1994 [21243] libc: support_delete_temp_file should issue warning for failed
1996 [21244] libc: support resolv_test_start() socket fd close should be
1998 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1999 new posix_spawn implementation
2000 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2001 leads to lower CPU frequency
2002 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2003 [21261] libc: [sparc64] bits/setjmp.h namespace
2004 [21267] network: [mips] bits/socket.h IOC* namespace
2005 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2006 [21270] libc: mmap64 silently truncates large offset values
2007 [21275] libc: posix_spawn always crashes on ia64 now
2008 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2009 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2010 [21289] libc: Incorrect declaration for 32-bit platforms with
2011 _FILE_OFFSET_BITS=64 causes build error
2012 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2013 not support gethostbyname4_r
2014 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2016 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2018 [21340] libc: Support POSIX_SPAWN_SETSID
2019 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2020 [21359] network: ns_name_pack needs additional byte in destination buffer
2021 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2022 against fragmentation attacks (CVE-2017-12132)
2023 [21369] network: resolv: Remove EDNS fallback
2024 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2026 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2027 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2028 [21393] stdio: Missing dup3 error check in freopen, freopen64
2029 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2030 [21399] localedata: Bad description for U00EC in
2031 localedata/charmaps/CP1254
2032 [21411] malloc: realloc documentation error
2033 [21426] network: sys/socket.h uio.h namespace
2034 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2035 [21445] libc: signal.h bsd_signal namespace
2036 [21455] network: Network headers stdint.h namespace
2037 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2039 [21475] network: resolv: Overlong search path is truncated mid-label
2040 [21511] libc: sigstack namespace
2041 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2042 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2043 bits/syscall.h: No such file or directory
2044 [21517] libc: struct sigaltstack namespace
2045 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2046 [21533] localedata: Update locale data to Unicode 10.0
2048 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2049 junk at end of line, first unrecognized character is `@'
2050 [21538] libc: SIG_HOLD missing for XPG4
2051 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2052 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2053 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2054 [21543] libc: sigevent namespace
2055 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2056 size for general purpose registers in mcontext_t structure
2057 [21550] libc: sigwait namespace
2058 [21552] libc: XPG4 bsd_signal namespace
2059 [21554] libc: sigpause namespace
2060 [21560] libc: sys/wait.h signal.h namespace
2061 [21561] libc: waitid namespace
2062 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2063 '/usr/include/stdlib.h': Permission denied
2064 [21575] libc: sys/wait.h missing struct rusage definition
2065 [21584] libc: sigaltstack etc namespace
2066 [21597] libc: siginterrupt namespace
2067 [21607] math: hppa: FAIL: math/test-tgmath
2068 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2070 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2071 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2072 stack and heap (CVE-2017-1000366)
2073 [21625] libc: wait3 namespace
2074 [21654] nss: Incorrect pointer alignment in NSS group merge result
2076 [21657] network: Parse interface zone id for node-local multicast
2077 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2079 [21666] libc: .symver is used on common symbol
2080 [21668] network: resolv: res_init cross-thread broadcast introduces race
2082 [21687] math: tgmath.h totalorder, totalordermag return type
2083 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2085 [21696] libc: Incorrect assumption of of __cpu_mask in
2086 posix/sched_cpucount.c
2087 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2088 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2090 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2091 leading to relocation crash
2092 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2093 `resolv_conf_matches (resp, conf)' failed.
2094 [21710] localedata: Added Samoan language locale for Samoa
2095 [21711] localedata: Pashto yesstr/nostr locale are missing
2096 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2097 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2098 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2099 [21723] localedata: yesstr/nostr missing for Chinese language locale
2100 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2102 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2104 [21728] localedata: New Locale for Tongan language
2105 [21729] localedata: incorrect LC_NAME fields for hi_IN
2106 [21733] localedata: yesstr and nostr are missing for zh_HK
2107 [21734] localedata: Missing yesstr and nostr are for kw_GB
2108 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2109 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2110 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2111 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2113 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2115 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2117 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2118 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2119 [21759] localedata: missing yesstr and nostr for Tigrinya
2120 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2121 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2122 [21767] localedata: Missing Bislama locales
2123 [21768] localedata: Missing yesstr and nostr for aa_ET
2124 [21770] localedata: Missing Field in li_NL
2125 [21778] nptl: Robust mutex may deadlock
2126 [21779] libc: MicroBlaze segfaults when loading libpthread
2127 [21783] localedata: Fix int_select international_call_prefixes
2128 [21784] localedata: Inconsistency in country_isbn
2129 [21788] localedata: Missing Country Postal Abbreviations
2130 [21794] localedata: Added-country_isbn-for-Italy
2131 [21795] localedata: Add/Fix country_isbn for France
2132 [21796] localedata: Added country_isbn for Republic of Korea
2133 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2134 [21799] localedata: Added int_select international_call_prefixes
2135 [21801] localedata: Added int_select international_call_prefixes
2136 [21804] nptl: Double semicolon in thread-shared-types.h
2137 [21807] localedata: LC_ADDRESS fix for pap_CW
2138 [21808] localedata: Fix LC_ADDRESS for pap_AW
2139 [21821] localedata: Added country_name in mai_IN
2140 [21822] localedata: Fix LC_TIME for mai_IN
2141 [21823] localedata: missing yesstr, nostr for sa_IN
2142 [21825] localedata: Fix name_mrs for mag_IN
2143 [21828] localedata: 2.26 changelog should mention user visible changes
2145 [21835] localedata: Added Maithili language locale for Nepal
2146 [21838] localedata: Removed redundant data for the_NP
2147 [21839] localedata: Fix LC_MONETARY for ta_LK
2148 [21844] localedata: Fix Latin characters and Months Sequence.
2149 [21848] localedata: Fix mai_NP Title Name
2154 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2155 24731-2:2010, is supported to enable declarations of functions from that
2156 TR. Note that not all functions from that TR are supported by the GNU C
2159 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2160 18661-1:2014, is supported to enable declarations of functions and macros
2161 from that TS. Note that not all features from that TS are supported by
2164 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2165 18661-4:2015, is supported to enable declarations of functions and macros
2166 from that TS. Note that most features from that TS are not supported by
2169 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2170 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2171 Since the GNU C Library defaults to a much newer revision of POSIX, this
2172 will only affect programs that specifically request an old conformance
2173 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2174 see a change in the visible declarations, but a program compiled with
2175 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2178 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2179 defined by all multithreaded code, but glibc has not required this for
2182 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2183 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2184 will only be available from <sys/sysmacros.h>.
2186 These macros are not part of POSIX nor XSI, and their names frequently
2187 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2188 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2189 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2192 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2193 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2194 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2196 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2197 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2198 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2199 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2200 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2201 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2202 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2203 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2204 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2205 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2206 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2209 * New <math.h> features are added from TS 18661-1:2014:
2211 - Signaling NaN macros: SNANF, SNAN, SNANL.
2213 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2214 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2215 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2217 - llogb functions: the llogb, llogbf and llogbl functions, and the
2218 FP_LLOGB0 and FP_LLOGBNAN macros.
2220 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2223 - Comparison macros: iseqsig.
2225 - Classification macros: iscanonical, issubnormal, iszero.
2227 - Total order functions: totalorder, totalorderf, totalorderl,
2228 totalordermag, totalordermagf, totalordermagl.
2230 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2232 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2233 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2235 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2236 are added to libc. They convert a floating-point number into string.
2238 * Most of glibc can now be built with the stack smashing protector enabled.
2239 It is recommended to build glibc with --enable-stack-protector=strong.
2240 Implemented by Nick Alcock (Oracle).
2242 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2243 intended to be used instead of memset() to erase sensitive data after use;
2244 the compiler will not optimize out calls to explicit_bzero even if they
2245 are "unnecessary" (in the sense that no _correct_ program can observe the
2246 effects of the memory clear).
2248 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2249 to float instead of double. This does not affect the ABI of any libraries
2250 that are part of the GNU C Library, but may affect the ABI of other
2251 libraries that use this type in their interfaces.
2253 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2254 float_t and double_t types are now defined to long double instead of float
2255 and double. These options are not the default, and this does not affect
2256 the ABI of any libraries that are part of the GNU C Library, but it may
2257 affect the ABI of other libraries that use this type in their interfaces,
2258 if they are compiled or used with those options.
2260 * The getentropy and getrandom functions, and the <sys/random.h> header file
2263 * The buffer size for byte-oriented stdio streams is now limited to 8192
2264 bytes by default. Previously, on Linux, the default buffer size on most
2265 file systems was 4096 bytes (and thus remains unchanged), except on
2266 network file systems, where the buffer size was unpredictable and could be
2267 as large as several megabytes.
2269 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2270 for the Linux quota interface which predates kernel version 2.4.22 has
2273 * The malloc_get_state and malloc_set_state functions have been removed.
2274 Already-existing binaries that dynamically link to these functions will
2275 get a hidden implementation in which malloc_get_state is a stub. As far
2276 as we know, these functions are used only by GNU Emacs and this change
2277 will not adversely affect already-built Emacs executables. Any undumped
2278 Emacs executables, which normally exist only during an Emacs build, should
2279 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2281 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2282 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2283 âno-ip6-dotintâ had already been the default, and support for the
2284 âip6-dotintâ option was removed from the Internet in 2006.
2286 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2287 flag from <resolv.h> have been removed. The option relied on a
2288 backwards-incompatible DNS extension which was never deployed on the
2291 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2292 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2293 They were already unimplemented.
2295 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2296 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2297 removed again from the IETF name lookup interface specification in RFC
2298 2553. Applications should use getaddrinfo instead.
2300 * DNSSEC-related declarations and definitions have been removed from the
2301 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2302 decode the data part of DNSSEC record types. Previous versions of glibc
2303 only implemented minimal support for the previous version of DNSSEC, which
2304 is incompatible with the currently deployed version.
2306 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2307 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2308 <arpa/nameser.h> header file because the distinction between RR types and
2309 meta-RR types is not officially standardized, subject to revision, and
2310 thus not suitable for encoding in a macro.
2312 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2313 and rhook members of the res_state type in <resolv.h> have been removed.
2314 The glibc stub resolver did not support these hooks, but the header file
2315 did not reflect that.
2317 * For multi-arch support it is recommended to use a GCC which has
2318 been built with support for GNU indirect functions. This ensures
2319 that correct debugging information is generated for functions
2320 selected by IFUNC resolvers. This support can either be enabled by
2321 configuring GCC with '--enable-gnu-indirect-function', or by
2322 enabling it by default by setting 'default_gnu_indirect_function'
2323 variable for a particular architecture in the GCC source file
2326 * GDB pretty printers have been added for mutex and condition variable
2327 structures in POSIX Threads. When installed and loaded in gdb these pretty
2328 printers show various pthread variables in human-readable form when read
2329 using the 'print' or 'display' commands in gdb.
2331 * Tunables feature added to allow tweaking of the runtime for an application
2332 program. This feature can be enabled with the '--enable-tunables' configure
2333 flag. The GNU C Library manual has details on usage and README.tunables has
2334 instructions on adding new tunables to the library.
2336 * A new version of condition variables functions have been implemented in
2337 the NPTL implementation of POSIX Threads to provide stronger ordering
2340 * A new version of pthread_rwlock functions have been implemented to use a more
2341 scalable algorithm primarily through not using a critical section anymore to
2344 Security related changes:
2346 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2347 have been created with makecontext could fail to terminate due to a
2348 missing .cantunwind annotation. This has been observed to lead to a hang
2349 (denial of service) in some Go applications compiled with gccgo. Reported
2350 by Andreas Schwab. (CVE-2016-6323)
2352 * The DNS stub resolver functions would crash due to a NULL pointer
2353 dereference when processing a query with a valid DNS question type which
2354 was used internally in the implementation. The stub resolver now uses a
2355 question type which is outside the range of valid question type values.
2358 The following bugs are resolved with this release:
2360 [4099] stdio: Overly agressive caching by stream i/o functions.
2361 [7065] build: Support building glibc with -fstack-protector or -fstack-
2363 [9842] localedata: en_CA: incorrect date format
2364 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2365 before it started waiting
2366 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2367 [15765] nptl: sem_open is wrongly a cancellation point
2368 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2369 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2371 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2372 library linked with pthread
2373 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2374 "FIXME: Ingo" issue)
2375 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2376 [17252] libc: getrandom and getentropy syscall
2377 [17730] malloc: thread-local storage is sometimes improperly free()'d
2378 after being __libc_memalign()'d
2379 [18241] stdio: failed fseek on memstream does not set errno and can fail
2381 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2383 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2384 PTHREAD_PRIO_INHERIT mutex on ARM
2385 [18784] network: res_query and related function crash for special record
2386 type queries (CVE-2015-5180)
2387 [19380] math: strtod does not raise "inexact"
2388 [19387] string: Integer overflow in memchr
2389 [19390] string: Integer overflow in strncat
2390 [19398] build: linknamespace tests fail with massively parallel build
2391 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2393 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2394 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2395 [19514] libc: [PATCH] Fix spelling errors in spelling
2396 "implement"/"implementation" in several places
2397 [19582] network: Deprecate RES_USE_INET6
2398 [19673] manual: clog10 docs appear to be erroneous
2399 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2400 causes a segmentation fault
2401 [19826] libc: invalid pointer returned from __tls_get_addr with static
2403 [20016] network: resolv: Remove hooks support from the API
2404 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2406 [20033] math: [x86_64] vectorized math function don't call the __finite
2408 [20116] nptl: use after free in pthread_create
2409 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2410 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2412 [20311] nptl: please install proc_service.h
2413 [20366] libc: Compilation errors in installed headers in strict-compliance
2415 [20370] malloc: malloc: Arena free list management is still racy
2416 (incorrect fix in bug 19243)
2417 [20386] libc: assert (X = 0) does not result in GCC warning
2418 [20432] malloc: malloc: Minimize interface required for interposition
2419 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2420 in _Unwind_Backtrace (CVE-2016-6323)
2421 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2422 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2424 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2425 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2426 [20477] network: resolv: incorrect double-checked locking related to
2428 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2430 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2432 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2433 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2434 cause transition penalty
2435 [20517] math: sparcv9 missing fdiml compat symbol
2436 [20524] manual: strverscmp is inconsistent
2437 [20525] libc: <sys/quota.h> should be based on kernel headers
2438 [20539] math: GCC 7 -static -lm fails to link at -O3
2439 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2441 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2443 [20591] network: Remove obsolete DNSSEC support
2444 [20592] network: DNS resource record type classification macros in
2445 <arpa/nameser.h> are incorrect
2446 [20593] network: Update DNS RR type definitions
2447 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2448 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2450 [20629] network: libresolv: Remove support for bitstring labels
2452 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2453 assertion: "maxidx >= 2"
2454 [20660] math: [arm] Use VSQRT
2455 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2456 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2457 [20689] libc: Test for FMA should also check for AVX.
2458 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2459 [20715] math: iszero macro breaks existing code
2460 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2461 [20728] libc: powerpc: Missing TOC stub in clone
2462 [20729] build: glibc-2.24 fails to build for i486 with -Os
2463 [20750] build: Build fails with default PIE enabled gcc-6.x
2464 [20768] math: [alpha] sqrt fegetenv namespace
2465 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2467 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2468 __FLT_EVAL_METHOD__ is 2
2469 [20790] network: rpcgen buffer overrun in get_prog_declaration
2470 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2471 [20829] libc: crypt snprintf namespace
2472 [20847] libc: tst-vfork3 failure
2473 [20855] math: Default bits/mathdef.h has inappropriate float_t
2474 [20859] math: [sh4] FP_ILOGB0 invalid
2475 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2476 U+20AC), not same as GBK
2477 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2478 [20916] math: pow handling of sNaN arguments
2479 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2480 [20919] math: Bad pow (qNaN, 0) result with -lieee
2481 [20940] math: hypot sNaN handling
2482 [20947] math: fmax, fmin sNaN handling
2483 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2484 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2486 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2487 [20973] nptl: robust mutexes: Lost wake-ups
2488 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2489 [20978] nis: strlen on null pointer in nss_nisplus
2490 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2492 [21014] string: i686 memchr overflows internal pointer check
2493 [21019] libc: [mips] n32 lseek incorrect on overflow
2494 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2495 [21026] libc: [MIPS] readahead syscall is broken on n64
2496 [21028] math: Fallback fesetexceptflag should always succeed
2497 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2498 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2500 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2501 [21061] librt: [microblaze] librt lost clock_* exports
2502 [21073] libc: tunables: insecure environment variables passed to
2503 subprocesses with AT_SECURE
2504 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2508 * The minimum Linux kernel version that this version of the GNU C Library
2509 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2510 kernel version 2.6.32 or later suffices (on architectures that already
2511 required kernel versions more recent than 3.2, those requirements remain
2512 unchanged). Linux 3.2 or later kernel headers are required on all
2515 * The pap_AN locale has been deleted. This has been deprecated for a long
2516 time. It has been replaced by pap_AW & pap_CW, both of which have long
2517 been included in previous releases.
2519 * The readdir_r and readdir64_r functions have been deprecated. It is
2520 recommended to use readdir and readdir64 instead.
2522 * The type âunion waitâ has been removed. It was deprecated in the early
2523 1990s and never part of POSIX. Application code should use the int type
2524 instead of âunion waitâ.
2526 * A new NSS action is added to facilitate large distributed system
2527 administration. The action, MERGE, allows remote user stores like LDAP
2528 to be merged into local user stores like /etc/groups in order to provide
2529 easy to use, updated, and managed sets of merged credentials. The new
2530 action can be used by configuring it in /etc/nsswitch.conf:
2531 group: files [SUCCESS=merge] nis
2532 Implemented by Stephen Gallagher (Red Hat).
2534 * The deprecated __malloc_initialize_hook variable has been removed from the
2537 * The long unused localedef --old-style option has been removed. It hasn't
2538 done anything in over 16 years. Scripts using this option can safely
2541 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2542 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2543 return the next representable value in the direction of positive infinity
2544 and the nextdown functions return the next representable value in the
2545 direction of negative infinity. These are currently enabled as GNU
2548 Security related changes:
2550 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2551 could result in a stack overflow when getnetbyname was called with an
2552 overly long name. (CVE-2016-3075)
2554 * Previously, getaddrinfo copied large amounts of address data to the stack,
2555 even after the fix for CVE-2013-4458 has been applied, potentially
2556 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2557 instead. Reported by Michael Petlan. (CVE-2016-3706)
2559 * The glob function suffered from a stack-based buffer overflow when it was
2560 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2561 Reported by Alexander Cherepanov. (CVE-2016-1234)
2563 * The Sun RPC UDP client could exhaust all available stack space when
2564 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2565 alloca plugin for GCC. (CVE-2016-4429)
2567 * The IPv6 name server management code in libresolv could result in a memory
2568 leak for each thread which is created, performs a failing naming lookup,
2569 and exits. Over time, this could result in a denial of service due to
2570 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2572 The following bugs are resolved with this release:
2574 [1170] localedata: ne_NP: update Nepali locale definition file
2575 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2577 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2578 [6796] math: fdim() does not set errno on overflow
2579 [10354] libc: posix_spawn should use vfork() in more cases than presently
2580 [11213] localedata: localedata: add copyright disclaimer to locale files
2581 [12143] localedata: chr_US: new Cherokee locale
2582 [12450] localedata: sgs_LT: new locale
2583 [12676] localedata: ln_CD: new locale
2584 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2586 [13304] math: fma, fmaf, fmal produce wrong results
2587 [14259] build: --localedir arg to configure is ignored
2588 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2589 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2590 [14934] localedata: es_CL: wrong first weekday chilean locale
2591 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2593 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2595 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2596 [15368] nptl: raise() is not async-signal-safe
2597 [15479] math: ceil, floor, round and trunc raise inexact exception
2598 [15578] localedata: kk_KZ: various updates
2599 [16003] localedata: pap_AN: punt old locale
2600 [16137] localedata: iw_IL: punt old locale
2601 [16190] localedata: eo: new esperanto locale
2602 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2603 [16742] malloc: race condition: pthread_atfork() called before first
2604 malloc() results in unexpected locking behaviour/deadlocks
2605 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2607 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2608 [17565] localedata: pt_PT: wrong (work-)week start
2609 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2610 [17950] build: Build fails with -msse
2611 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2612 [18433] libc: posix_spawn does not return correctly upon failure to
2614 [18453] localedata: charmaps/IBM875: incorrect codes
2615 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2617 [18896] localedata: he_IL: improvements for currency
2618 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2619 Romanian locale data
2620 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2622 [19056] libc: Deprecate readdir_r
2623 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2625 [19198] localedata: nl_NL: small improvements for Dutch locales
2626 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2627 nameservers (CVE-2016-5417)
2628 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2630 [19400] locale: Language missing in "iso-639.def", trivial fix in
2632 [19431] malloc: Deadlock between fflush, getdelim, and fork
2633 [19505] libc: Incorrect file descriptor validity checks in
2634 posix_spawn_file_actions_add{open,close,dup2}
2635 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2636 when using RTLD_NEXT
2637 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2638 `intl/{gettextP,loadinfo}.h'
2639 [19534] libc: execle, execlp may use malloc
2640 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2641 [19573] network: res_nclose and __res_maybe_init disagree about name
2642 server initialization, breaking Hesiod
2643 [19575] localedata: Status of GB18030 tables
2644 [19581] localedata: sr_* date_fmt string contains additional newline
2645 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2647 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2648 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2649 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2650 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2652 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2654 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2656 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2657 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2658 [19633] locale: strfmon_l applies global locale to number formatting
2659 [19642] network: Memory leak in getnameinfo
2660 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2661 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2663 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2664 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2666 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2667 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2669 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2671 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2673 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2674 pointers and lengths in error-case.
2675 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2676 report errors on UTF-16 surrogates values.
2677 [19755] nscd: nscd assertion failure in gc
2678 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2679 [19759] libc: mempcpy shouldn't be inlined
2680 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2681 [19765] libc: s390 needs an optimized mempcpy
2682 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2683 NAME_MAX limit assumption (CVE-2016-1234)
2684 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2685 [19787] network: Missing and incorrect truncation checks in getnameinfo
2686 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2688 [19791] network: Assertion failure in res_query.c with un-connectable name
2690 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2691 [19822] math: libm.so install clobbers old version
2692 [19825] network: resolv: send_vc can return uninitialized data in second
2693 response to getaddrinfo
2694 [19830] network: nss_dns: should check RDATA length against buffer length
2695 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2696 confronted with A/AAAA records of invalid size
2697 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2698 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2699 [19853] stdio: Printing IBM long double in decimal with high precision is
2701 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2702 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2703 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2705 [19865] network: Assertion failure or memory leak in
2706 _nss_dns_getcanonname_r
2707 [19868] network: nss_dns: netent code does not skip over non-PTR records
2708 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2710 [19881] string: Improve x86-64 memset
2711 [19907] string: Incorrect memcpy tests
2712 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2714 [19925] libc: termios.h XCASE namespace
2715 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2716 [19929] libc: limits.h NL_NMAX namespace
2717 [19931] stdio: Memory leak in vfprintf
2718 [19957] libc: clone(CLONE_VM) access invalid parent memory
2719 [19963] localedata: en_IL: New locale
2720 [19989] stdio: stdio.h cuserid namespace
2721 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2723 [19996] locale: langinfo.h nl_langinfo_l namespace
2724 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2725 [20010] network: getaddrinfo: Stack overflow in hostent translation
2727 [20012] stdio: libio: fmemopen append mode failure
2728 [20014] stdio: stdio.h namespace for pre-threads POSIX
2729 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2730 [20023] libc: fcntl.h timespec namespace
2731 [20024] math: [x86_64] vectorized sincos trashes the stack
2732 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2733 [20041] time: sys/time.h timespec namespace
2734 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2735 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2736 [20051] libc: ttyslot in wrong header under wrong conditions
2737 [20054] libc: gethostname not declared for XPG4
2738 [20055] libc: termios.h missing tcgetsid for XPG4
2739 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2741 [20073] libc: sys/stat.h fchmod namespace
2742 [20074] libc: stdlib.h rand_r namespace
2743 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2744 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2746 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2747 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2749 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2750 [20119] libc: Wrong mask for processors level type from CPUID
2751 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2752 AS not supporting AVX512
2753 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2755 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2756 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2758 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2759 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2760 [20178] libc: posix_spawn{p} should not call exit
2761 [20191] stdio: libio: vtables hardening
2762 [20195] string: FMA4 detection requires CPUID execution with register
2764 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2765 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2767 [20212] math: acos (sNaN) returns sNaN
2768 [20213] math: asin (sNaN) returns sNaN
2769 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2770 [20218] math: [i386] asinhl (sNaN) returns sNaN
2771 [20219] math: [i386] atanhl (sNaN) returns sNaN
2772 [20222] stdio: fopencookie: Mangle function pointers
2773 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2774 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2775 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2777 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2778 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2779 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2780 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2781 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2782 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2783 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2784 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2785 [20240] math: modf (sNaN) returns sNaN
2786 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2787 [20250] math: frexp (sNaN) returns sNaN
2788 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2789 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2791 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2792 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2793 subscript is below array bounds [-Werror=array-bounds]
2794 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2795 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2797 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2798 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2800 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2801 "invalid" exceptions
2802 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2803 [20316] localedata: id_ID: Februari instead of Pebruari
2804 [20327] string: POWER8 strcasecmp returns incorrect result
2805 [20347] math: Failure: Test: j0_downward (0xap+0)
2806 [20348] libc: FAIL: misc/tst-preadvwritev64
2807 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2808 [20350] libc: There is no test for p{read,write}64
2809 [20357] math: Incorrect cos result for 1.5174239687223976
2810 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2814 * Unicode 8.0.0 Support: Character encoding, character type info, and
2815 transliteration tables are all updated to Unicode 8.0.0, using new
2816 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2817 These updates cause user visible changes, such as the fixes for bugs
2818 89, 16061, and 18568.
2820 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2821 kernel-internal CPU set size. This means that requests that change the
2822 CPU affinity which failed before (for example, an all-ones CPU mask) will
2823 now succeed. Applications that need to determine the effective CPU
2824 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2825 setting it because the kernel can adjust it (and the previous size check
2826 would not detect this in the majority of cases).
2828 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2829 the following new symbols are used: fts64_children, fts64_close,
2830 fts64_open, fts64_read and fts64_set.
2832 * getaddrinfo now detects certain invalid responses on an internal netlink
2833 socket. If such responses are received, an affected process will
2834 terminate with an error message of "Unexpected error <number> on netlink
2835 descriptor <number>" or "Unexpected netlink response of size <number> on
2836 descriptor <number>". The most likely cause for these errors is a
2837 multi-threaded application which erroneously closes and reuses the netlink
2838 file descriptor while it is used by getaddrinfo.
2840 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2841 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2842 unnecessary serialization of memory allocation requests across threads.
2843 The defect is now corrected. Users should see a substantial increase in
2844 the concurent throughput of allocation requests for applications which
2845 trigger this bug. Affected applications typically create and
2846 destroy threads frequently. (Bug 19048 was reported and analyzed by
2849 * There is now a --disable-timezone-tools configure option for disabling the
2850 building and installing of the timezone related utilities (zic, zdump, and
2851 tzselect). This is useful for people who build the timezone data and code
2852 independent of the GNU C Library.
2854 * The obsolete header <regexp.h> has been removed. Programs that require
2855 this header must be updated to use <regex.h> instead.
2857 * The obsolete functions bdflush, create_module, get_kernel_syms,
2858 query_module and uselib are no longer available to newly linked binaries;
2859 the header <sys/kdaemon.h> has been removed. These functions and header
2860 were specific to systems using the Linux kernel and could not usefully be
2861 used with the GNU C Library on systems with version 2.6 or later of the
2864 * Optimized string, wcsmbs and memory functions for IBM z13.
2865 Implemented by Stefan Liebler.
2867 * Newly linked programs that define a variable called signgam will no longer
2868 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2869 require signgam to be set by those functions must ensure that they use the
2870 variable provided by the GNU C Library and declared in <math.h>, without
2871 defining their own copy.
2873 * The minimum GCC version that can be used to build this version of the GNU
2874 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2875 still be used to compile programs using the GNU C Library.
2877 Security related changes:
2879 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2880 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2882 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2883 the pointer guard feature. It is always enabled. Previously,
2884 LD_POINTER_GUARD could be used to disable security hardening in binaries
2885 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2888 * An integer overflow in hcreate and hcreate_r could lead to an
2889 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2891 * The catopen function no longer has unbounded stack usage. Reported by
2892 Max. (CVE-2015-8779)
2894 * The nan, nanf and nanl functions no longer have unbounded stack usage
2895 depending on the length of the string passed as an argument to the
2896 functions. Reported by Joseph Myers. (CVE-2014-9761)
2898 * A stack-based buffer overflow was found in libresolv when invoked from
2899 libnss_dns, allowing specially crafted DNS responses to seize control
2900 of execution flow in the DNS client. The buffer overflow occurs in
2901 the functions send_dg (send datagram) and send_vc (send TCP) for the
2902 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2903 family. The use of AF_UNSPEC triggers the low-level resolver code to
2904 send out two parallel queries for A and AAAA. A mismanagement of the
2905 buffers used for those queries could result in the response of a query
2906 writing beyond the alloca allocated buffer created by
2907 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2908 the overflow. Thanks to the Google Security Team and Red Hat for
2909 reporting the security impact of this issue, and Robert Holiday of
2910 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2912 The following bugs are resolved with this release:
2914 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2915 [887] math: Math library function "logb" and "nextafter" inconsistent
2916 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2917 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2918 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2919 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2921 [4404] localedata: German translation of "Alarm clock" is misleading
2922 [6799] math: nextafter() and nexttoward() doen't set errno on
2923 overflow/underflow errors
2924 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2926 [10432] nis: _nss_nis_setnetgrent assertion failure
2927 [11460] libc: fts has no LFS support
2928 [12926] network: getaddrinfo()/make_request() may spin forever
2929 [13065] nptl: Race condition in pthread barriers
2930 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2931 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2933 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2934 [14912] libc: Rename non-installed bits/*.h headers
2935 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2936 [15367] math: Let gcc use __builtin_isinf
2937 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2938 [15421] math: lgamma wrongly sets signgam for ISO C
2939 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2940 FE_INVALID with argument out of range
2941 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2943 [15786] dynamic-link: ifunc resolver functions can smash function
2945 [15918] math: Unnecessary check for equality in hypotf()
2946 [16061] localedata: Review / update transliteration data
2947 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2949 [16141] time: strptime %z offset restriction
2950 [16171] math: drem should be alias of remainder
2951 [16296] math: fegetround is pure?
2952 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2953 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2955 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2956 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2958 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2959 "Exception "Inexact" set" on ppc32
2960 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2961 [16517] math: Missing underflow exception from tanf/tan/tanl
2962 [16519] math: Missing underflow exception from sinhf
2963 [16520] math: Missing underflow exception from tanhf
2964 [16521] math: Missing underflow exception from exp2
2965 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2967 [16734] stdio: fopen calls mmap to allocate its buffer
2968 [16961] math: nan function incorrect handling of bad sequences
2969 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2970 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2971 [16985] locale: localedef: confusing error message when opening output
2973 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2974 [17197] locale: Redundant shift character in iconv conversion output at
2976 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2977 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2978 [17250] dynamic-link: static linking breaks nss loading
2979 (getaddrinfo/getpwnam/etc...)
2980 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2982 [17441] math: isnan() should use __builtin_isnan() in GCC
2983 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2984 (related to lock elision)
2985 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2986 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2987 [17887] time: strptime should be able to parse "+01:00" style timezones
2988 [17905] libc: catopen() Multiple unbounded stack allocations
2990 [18084] libc: backtrace (..., 0) dumps core on x86
2991 [18086] libc: nice() sets errno to 0 on success
2992 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2993 is too large (CVE-2015-8778)
2994 [18251] dynamic-link: SONAME missing when audit modules provides path
2995 [18265] libc: add attributes for wchar string and memory functions
2996 [18370] math: csqrt missing underflows
2997 [18421] libc: [hppa] read-only segment has dynamic relocations
2998 [18472] libc: Obsolete syscall wrappers should be compat symbols
2999 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3000 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3001 [18525] localedata: Remove locale timezone information
3002 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3003 [18568] localedata: Update locale data to Unicode 8.0
3004 [18589] locale: sort-test.sh fails at random
3005 [18595] math: ctan, ctanh missing underflows
3006 [18604] libc: assert macro-expands its argument
3007 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3008 contains a vector instruction exception.
3009 [18611] math: j1, jn missing errno setting on underflow
3010 [18618] localedata: sync Chechen locale definitions with other *_RU
3012 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3013 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3014 [18665] network: In send_dg, the recvfrom function is NOT always using the
3015 buffer size of a newly created buffer (CVE-2015-7547)
3016 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3018 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3020 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3021 [18699] math: tilegx cproj() for various complex infinities does not yield
3023 [18724] libc: Harden put*ent functions against data injection
3024 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3025 [18755] build: build errors with -DNDEBUG
3026 [18757] stdio: fmemopen fails to set errno on failure
3027 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3029 [18781] libc: openat64 lacks O_LARGEFILE
3030 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3031 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3032 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3033 [18790] math: [ldbl-128ibm] tanhl inaccurate
3034 [18795] libc: stpncpy fortification misses buffer lengths that are
3035 statically too large
3036 [18796] build: build fails for --disable-mathvec
3037 [18803] math: hypot missing underflows
3038 [18820] stdio: fmemopen may leak memory on failure
3039 [18823] math: csqrt spurious underflows
3040 [18824] math: fma spurious underflows
3041 [18825] math: pow missing underflows
3042 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3043 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3044 [18870] build: sem_open.c fails to compile with missing symbol
3046 [18872] stdio: Fix memory leak in printf_positional
3047 [18873] libc: posix_fallocate overflow check ineffective
3048 [18875] math: Excess precision leads incorrect libm
3049 [18877] libc: arm: mmap offset regression
3050 [18887] libc: memory corruption when using getmntent on blank lines
3051 [18918] localedata: hu_HU: change time to HH:MM:SS format
3052 [18921] libc: Regression: extraneous stat() and fstat() performed by
3054 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3055 binaries (CVE-2015-8777)
3056 [18951] math: tgamma missing underflows
3057 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3059 [18953] localedata: lt_LT: change currency symbol to the euro
3060 [18956] math: powf inaccuracy
3061 [18961] math: [i386] exp missing underflows
3062 [18966] math: [i386] exp10 missing underflows
3063 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3064 [18969] build: multiple string test failures due to missing locale
3066 [18970] libc: Reference of pthread_setcancelstate in libc.a
3067 [18977] math: float / long double Bessel functions not in XSI POSIX
3068 [18980] math: i386 libm functions return with excess range and precision
3069 [18981] math: i386 scalb*, ldexp return with excess range and precision
3070 [18982] stdio: va_list and vprintf
3071 [18985] time: Passing out of range data to strftime() causes a segfault
3073 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3074 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3075 [19012] locale: iconv_open leaks memory on error path
3076 [19016] math: clog, clog10 inaccuracy
3077 [19018] nptl: Mangle function pointers in tls_dtor_list
3078 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3079 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3080 [19048] malloc: malloc: arena free list can become cyclic, increasing
3082 [19049] math: [powerpc] erfc incorrect zero sign
3083 [19050] math: [powerpc] log* incorrect zero sign
3084 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3085 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3086 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3087 [19074] network: Data race in _res_hconf_reorder_addrs
3088 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3089 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3090 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3092 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3094 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3095 [19086] manual: posix_fallocate64 documented argument order is wrong.
3096 [19088] math: lround, llround missing exceptions close to overflow
3098 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3099 [19095] math: dbl-64 lrint incorrect for 64-bit long
3100 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3101 [19124] dynamic-link: ld.so failed to build with older assmebler
3102 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3103 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3104 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3105 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3106 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3107 pthread_setaffinity_np
3108 [19156] math: [ldbl-128] j0l spurious underflows
3109 [19164] nptl: tst-getcpu fails with many possible CPUs
3110 [19168] math: math/test-ildoubl and math/test-ldouble failure
3111 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3112 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3114 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3115 (FE_NOMASK_ENV) do not clear SSE exceptions
3116 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3117 _int_new_arena/reused_arena
3118 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3119 [19201] math: dbl-64 remainder incorrect sign of zero result
3120 [19205] math: bits/math-finite.h conditions do not match math.h and
3122 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3123 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3124 for C99-based standards
3125 [19212] libc: features.h not -Wundef clean
3126 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3128 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3129 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3130 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3132 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3133 "inexact" exceptions
3134 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3136 [19242] libc: strtol incorrect in Turkish locales
3137 [19243] malloc: reused_arena can pick an arena on the free list, leading
3138 to an assertion failure and reference count corruption
3139 [19253] time: tzset() ineffective when temporary TZ did not include DST
3141 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3142 [19270] math: [hppa] Shared libm missing __isnanl
3143 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3144 MAP_HUGETLB and MAP_STACK defines
3145 [19313] nptl: Wrong __cpu_mask for x32
3146 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3147 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3148 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3149 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3150 [19363] time: x32: times() return value wrongly truncates/sign extends
3152 [19367] dynamic-link: Improve branch prediction on Silvermont
3153 [19369] network: Default domain name not reset by res_ninit when "search"
3154 / "domain" entry is removed from resolv.conf
3155 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3157 [19385] localedata: bg_BG: time separator should be colon, not comma
3158 [19408] libc: linux personality syscall wrapper may erroneously return an
3159 error on 32-bit architectures
3160 [19415] libc: dladdr returns wrong names on hppa
3161 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3162 IBM905, IBM907, and IBM909
3163 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3164 [19443] build: build failures with -DDEBUG
3165 [19451] build: Make check fails on test-double-vlen2
3166 [19462] libc: Glibc failed to build with -Os
3167 [19465] math: Wrong code with -Os
3168 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3170 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3172 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3173 [19486] math: S390: Math tests fail with "Exception Inexact set".
3174 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3175 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3177 [19590] math: Fail to build shared objects that use libmvec.so functions.
3181 * The following bugs are resolved with this release:
3183 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3184 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3185 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3186 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3187 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3188 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3189 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3190 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3191 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3192 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3193 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3194 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3195 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3196 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3197 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3198 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3199 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3200 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3201 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3202 18657, 18676, 18694, 18696, 18887.
3204 * Cache information can be queried via sysconf() function on s390 e.g. with
3205 _SC_LEVEL1_ICACHE_SIZE as argument.
3207 * A buffer overflow in gethostbyname_r and related functions performing DNS
3208 requests has been fixed. If the NSS functions were called with a
3209 misaligned buffer, the buffer length change due to pointer alignment was
3210 not taken into account. This could result in application crashes or,
3211 potentially arbitrary code execution, using crafted, but syntactically
3212 valid DNS responses. (CVE-2015-1781)
3214 * The time zone file parser has been made more robust against crafted time
3215 zone files, avoiding heap buffer overflows related to the processing of
3216 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3217 large time zone data files. Overly long time zone specifiers in the TZ
3218 variable no longer result in stack overflows and crashes.
3220 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3221 for LD and GD on x86 and x86-64, has been implemented. You will need
3222 binutils-2.24 or later to enable this optimization.
3224 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3225 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3226 Hat). These updates cause user visible changes, such as the fix for bug
3229 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3230 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3231 condition in some applications.
3233 * Added vector math library named libmvec with the following vectorized x86_64
3234 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3236 The library can be disabled with --disable-mathvec. Use of the functions is
3237 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3238 Shared library libmvec.so is linked in as needed when using -lm (no need to
3239 specify -lmvec explicitly for not static builds).
3240 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3242 * A new fmemopen implementation has been added with the goal of POSIX
3243 compliance. The new implementation fixes the following long-standing
3244 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3245 old implementation is still present for use be by existing binaries.
3247 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3248 releases. It has been fixed to match 2.19 and older, but binaries built
3249 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3251 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3252 Contributed by Roland McGrath (Google).
3254 * The header <regexp.h> is deprecated, and will be removed in a future
3255 release. Use of this header will trigger a deprecation warning.
3256 Application developers should update their code to use <regex.h> instead.
3258 This header was formerly part of SUS, but was deprecated in 1994 and
3259 removed from the standard in 2001. Also, the glibc implementation
3260 leaks memory. See BZ#18681 for more details.
3264 * The following bugs are resolved with this release:
3266 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3267 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3268 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3269 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3270 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3271 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3272 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3273 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3274 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3275 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3278 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3279 too little memory for the to-be-scanned arguments and overflow the
3280 allocated buffer. The implementation now correctly computes the required
3281 buffer size when using malloc, and switches to malloc from alloca as
3284 * A new semaphore algorithm has been implemented in generic C code for all
3285 machines. Previous custom assembly implementations of semaphore were
3286 difficult to reason about or ensure that they were safe. The new version
3287 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3288 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3289 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3291 * Port to Altera Nios II has been contributed by Mentor Graphics.
3293 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3294 implementations for powerpc64/powerpc64le.
3295 Implemented by Adhemerval Zanella (IBM).
3297 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3298 and powerpc64le. This may improve lock scaling of existing programs on
3299 HTM capable systems. The lock elision code is only enabled with
3300 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3301 powerpc will issue a transaction abort on every syscall to avoid side
3302 effects being visible outside transactions.
3304 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3305 AArch64. Contributed by ARM Ltd.
3307 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3309 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3310 under certain input conditions resulting in the execution of a shell for
3311 command substitution when the application did not request it. The
3312 implementation now checks WRDE_NOCMD immediately before executing the
3313 shell and returns the error WRDE_CMDSUB as expected.
3315 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3316 processing format strings with a large number of format specifiers.
3318 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3319 infinite loop if the DNS response contained a PTR record of an unexpected
3322 * The minimum GCC version that can be used to build this version of the GNU
3323 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3324 still be used to compile programs using the GNU C Library.
3326 * The GNU C Library is now built with -Werror by default. This can be
3327 disabled by configuring with --disable-werror.
3329 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3331 * The obsolete sigvec function has been removed. This was the original
3332 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3333 programs have been using instead for about 25 years. Of course, ABI
3334 compatibility for old binaries using sigvec remains intact.
3336 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3337 with newer versions of bison.
3339 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3340 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3341 registers overlay two consecutive single-precision registers. MIPS32R2
3342 introduced a new FPU mode (FR=1) where double-precision registers extend the
3343 corresponding single-precision registers which is incompatible with the
3344 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3345 require the use of FR=1 making a transition necessary. New o32 ABI
3346 extensions enable users to migrate over time from the original o32 ABI
3347 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3348 tracks the ABI of any loaded object and verifies that new objects are
3349 compatible. Mode transitions will also be requested as required and
3350 unsupportable objects will be rejected. The ABI checks include both soft and
3351 hard float ABIs for o32, n32 and n64.
3353 GCC 5 with GNU binutils 2.25 onwards:
3354 It is strongly recommended that all o32 system libraries are built using the
3355 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3356 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3357 compiler using --with-fp-32=xx to set this by default.
3361 * The following bugs are resolved with this release:
3363 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3364 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3365 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3366 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3367 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3368 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3369 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3370 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3371 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3372 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3373 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3374 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3375 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3376 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3377 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3379 * Reverted change of ABI data structures for s390 and s390x:
3380 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3381 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3382 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3383 are preserved pointing straight to the same implementation as the old ones.
3384 Given that, new callers will simply provide a too-big buffer to these
3385 functions. Any applications/libraries out there that embed jmp_buf or
3386 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3387 against 2.19 headers will have to rebuilt again. This is necessary in any
3388 case to revert the breakage in their ABI caused by the glibc change.
3390 * Support for file description locks is added to systems running the
3391 Linux kernel. The standard file locking interfaces are extended to
3392 operate on file descriptions, not file descriptors, via the use of
3393 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3394 are associated with an open file instead of a process.
3396 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3398 * The minimum Linux kernel version that this version of the GNU C Library
3399 can be used with is 2.6.32.
3401 * Running the testsuite no longer terminates as soon as a test fails.
3402 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3403 with PASS or FAIL lines for individual tests. A summary of the results is
3404 printed, including a list of failing lists, and "make check" exits with
3405 error status if there were any unexpected failures. "make check
3406 stop-on-test-failure=y" may be used to keep the old behavior.
3408 * The am33 port, which had not worked for several years, has been removed
3411 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3412 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3413 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3414 conflicted with POSIX (support for which was removed in 2.19), the
3415 interfaces those macros enabled remain available when compiling with
3416 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3417 test macros defined.
3419 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3421 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3422 This may improve lock scaling of existing programs on TX capable systems.
3423 The lock elision code is only built with --enable-lock-elision=yes and
3424 then requires a GCC version supporting the TX builtins. With lock elision
3425 default mutexes are elided via __builtin_tbegin, if the cpu supports
3426 transactions. By default lock elision is not enabled and the elision code
3429 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3430 copy the path argument. This allowed programs to cause posix_spawn to
3431 deference a dangling pointer, or use an unexpected pathname argument if
3432 the string was modified after the posix_spawn_file_actions_addopen
3435 * All supported architectures now use the main glibc sysdeps directory
3436 instead of some being in a separate "ports" directory (which was
3437 distributed separately before glibc 2.17).
3439 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3440 On configurations that support it (all Linux configurations), it's now
3441 used regardless of the --enable-add-ons switch to configure. It is no
3442 longer possible to build such configurations without pthreads support.
3444 * Locale names, including those obtained from environment variables (LANG
3445 and the LC_* variables), are more tightly checked for proper syntax.
3446 setlocale will now fail (with EINVAL) for locale names that are overly
3447 long, contain slashes without starting with a slash, or contain ".." path
3448 components. (CVE-2014-0475) Previously, some valid locale names were
3449 silently replaced with the "C" locale when running in AT_SECURE mode
3450 (e.g., in a SUID program). This is no longer necessary because of the
3453 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3454 with application code using Intel MPX instructions. (With all previous
3455 versions, the MPX register state could be clobbered when making calls
3456 into or out of a shared library.) Note that while the new dynamic
3457 linker is compatible with all known x86 hardware whether or not it
3458 supports Intel MPX, some x86 instruction-set emulators might fail to
3459 handle the new instruction encodings. This is known to affect Valgrind
3460 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3461 release), and might affect other tools that do instruction emulation.
3463 * Support for loadable gconv transliteration modules has been removed.
3464 The support for transliteration modules has been non-functional for
3465 over a decade, and the removal is prompted by security defects. The
3466 normal gconv conversion modules are still supported. Transliteration
3467 with //TRANSLIT is still possible, and the //IGNORE specifier
3468 continues to be supported. (CVE-2014-5119)
3470 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3471 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3472 resulting a denial-of-service security vulnerability in applications which
3473 use functions related to iconv. (CVE-2014-6040)
3477 * The following bugs are resolved with this release:
3479 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3480 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3481 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3482 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3483 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3484 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3485 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3486 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3487 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3488 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3489 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3490 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3491 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3492 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3493 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3494 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3495 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3496 16431, 16453, 16474, 16506, 16510, 16529
3498 * Slovenian translations for glibc messages have been contributed by the
3499 Translation Project's Slovenian team of translators.
3501 * The public headers no longer use __unused nor __block. This change is to
3502 support compiling programs that are derived from BSD sources and use
3503 __unused internally, and to support compiling with Clang's -fblock
3504 extension which uses __block.
3506 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3507 large collation sequences to optimize multiple passes. This cache
3508 computation may overflow for large collation sequences and may cause a
3509 stack or buffer overflow. This is now fixed to use a slower algorithm
3510 which does not use a cache if there is an integer overflow.
3512 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3513 rules for large collation sequences to optimize multiple passes and falls
3514 back to alloca if malloc fails, resulting in a possible stack overflow.
3515 The implementation now falls back to an uncached collation sequence lookup
3518 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3519 initialized for static applications resulting in the security feature
3520 being disabled. The pointer guard is now correctly initialized to a
3521 random value for static applications. Existing static applications need
3522 to be recompiled to take advantage of the fix (bug 15754).
3524 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3525 to the d_name member of struct dirent, or omit the terminating NUL
3526 character. (Bugzilla #14699).
3528 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3529 aligned_alloc functions could allocate too few bytes or corrupt the
3530 heap when passed very large allocation size values (Bugzilla #15855,
3533 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3534 for AF_INET6 has been fixed (Bugzilla #16072).
3536 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3537 pap_CW, quz_PE, the_NP.
3539 * Substantially revised locales: gd_GB, ht_HT
3541 * The LC_ADDRESS field was updated to support country_car for almost all
3544 * ISO 1427 definitions were updated.
3546 * ISO 3166 definitions were updated.
3548 * The localedef utility now supports --big-endian and --little-endian
3549 command-line options to generate locales for a different system from that
3550 for which the C library was built.
3552 * Binary locale files now only depend on the endianness of the system for
3553 which they are generated and not on other properties of that system. As a
3554 consequence, binary files generated with new localedef may be incompatible
3555 with old versions of the GNU C Library, and binary files generated with
3556 old localedef may be incompatible with this version of the GNU C Library,
3557 in the following circumstances:
3559 + Locale files may be incompatible on m68k systems.
3561 + Locale archive files (but not separate files for individual locales) may
3562 be incompatible on systems where plain "char" is signed.
3564 * The configure option --disable-versioning has been removed. Builds with
3565 --disable-versioning had not worked for several years.
3567 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3568 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3570 * SystemTap probes for malloc have been introduced.
3572 * SystemTap probes for slow multiple precision fallback paths of
3573 transcendental functions have been introduced.
3575 * Support for powerpc64le has been added.
3577 * The soft-float powerpc port now supports e500 processors.
3579 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3581 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3582 set of header declarations that are enabled by default, even when other
3583 feature test macros or compiler options such as -std=c99 would otherwise
3584 disable some of those declarations.
3586 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3587 conflict with POSIX. The libbsd-compat library (which was a dummy library
3588 that did nothing) has also been removed.
3590 * Preliminary documentation about Multi-Thread, Async-Signal and
3591 Async-Cancel Safety has been added.
3593 * Change of ABI data structures for s390 and s390x:
3594 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3595 allow for future hardware extensions. All library functions that accept or
3596 return these structures were versioned in order to provide backwards
3597 compatibility with existing code. However, not all cases can be handled
3598 with interface versioning. If an application embeds either structure into
3599 another structure and that structure is passed to another compilation unit
3600 which expects the newer larger-sized object then any access to the new
3601 fields will result in undefined behaviour. Similarly any access to fields
3602 that were moved by the enlarging of the structures will cause undefined
3603 behaviour. To fix the undefined behaviour all objects that are part of the
3604 final in-memory image must agree on the size of structures, and this may
3605 require recompilation.
3609 * The following bugs are resolved with this release:
3611 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3612 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3613 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3614 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3615 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3616 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3617 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3618 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3619 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3620 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3621 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3622 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3623 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3626 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3627 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3628 Distributions can re-enable building and using pt_chown via the new configure
3629 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3630 considerable security risks and should only be used if the distribution
3631 understands and accepts the risks.
3633 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3636 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3637 fixed (Bugzilla #15330).
3639 * Add support for calling C++11 thread_local object destructors on thread
3640 and program exit. This needs compiler support for offloading C++11
3641 destructor calls to glibc.
3643 * Improved worst case performance of libm functions with double inputs and
3646 * Support for priority inherited mutexes in pthread condition variables on
3647 non-x86 architectures.
3649 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3651 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3653 * Optimized string functions for ARM. Implemented by Will Newton and
3656 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3658 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3661 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3662 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3664 * Added a benchmark framework to track performance of functions in glibc.
3666 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3667 It is based on draft TS 18661 and currently enabled as a GNU extension.
3669 * On Linux, the clock function now uses the clock_gettime system call
3670 for improved precision, rather than old times system call.
3672 * Added support for version-3 tz format files. This is needed when using
3673 the tz database release 2013e or later, and affects a few unusual cases --
3674 currently only TZ='America/Godthab' for time stamps after 2037.
3676 * Added new API functions pthread_getattr_default_np and
3677 pthread_setattr_default_np to get and set the default pthread
3678 attributes of a process.
3680 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3681 This may improve lock scaling of existing programs on TSX capable systems.
3682 When the --enable-lock-elision=yes parameter is specified at configure
3683 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3686 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3687 availability). Implemented by Ryan S. Arnold.
3689 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3693 * The following bugs are resolved with this release:
3695 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3696 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3697 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3698 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3699 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3700 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3701 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3702 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3703 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3704 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3705 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3706 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3707 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3708 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3709 14879, 14889, 14893, 14898, 14914.
3711 * Optimization of memcpy for MIPS.
3713 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3714 EMFILE has been fixed (Bugzilla #14889).
3716 * The add-on ports collection is now distributed in the "ports" subdirectory
3717 of the main GNU C Library distribution, rather than separately.
3719 * Port to ARM AArch64 contributed by Linaro.
3721 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3722 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3724 Implemented by Andreas Krebbel.
3726 * The new function secure_getenv allows secure access to the environment,
3727 returning NULL if running in a SUID/SGID process. This function replaces
3728 the internal function __secure_getenv.
3730 * SystemTap static probes have been added into the dynamic linker.
3731 Implemented by Gary Benson.
3733 * Optimizations of string functions strstr, strcasestr and memmem.
3734 Implemented by Maxim Kuvyrkov.
3736 * The minimum Linux kernel version that this version of the GNU C Library
3737 can be used with is 2.6.16.
3739 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3740 powerpc POWER7. Implemented by Will Schmidt.
3742 * New configure option --disable-nscd builds the C library such that it
3743 never attempts to contact the Name Service Caching Daemon (nscd).
3744 New configure option --disable-build-nscd avoids building nscd itself;
3745 this is the default if --disable-nscd is used.
3747 * Improved support for cross-compilation, including cross-testing and
3748 bootstrap builds without a previously built glibc.
3750 * Several testsuite tests are now able to test multiple IFUNC variants of an
3751 interface, rather than just testing the one that would be chooen by
3754 * New configure options --with-bugurl and --with-pkgversion, for
3755 distributors to use to embed their bug-reporting and package version
3756 information in --help and --version output.
3758 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3759 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3760 allows creation of chroots without the procfs mounted on /proc.
3762 * The `crypt' function now fails if passed salt bytes that violate the
3763 specification for those values. On Linux, the `crypt' function will
3764 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3765 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3766 when the mode is enabled.
3768 * The `clock_*' suite of functions (declared in <time.h>) is now available
3769 directly in the main C library. Previously it was necessary to link with
3770 -lrt to use these functions. This change has the effect that a
3771 single-threaded program that uses a function such as `clock_gettime' (and
3772 is not linked with -lrt) will no longer implicitly load the pthreads
3773 library at runtime and so will not suffer the overheads associated with
3774 multi-thread support in other code such as the C++ runtime library.
3776 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3781 * The following bugs are resolved with this release:
3783 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3784 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3785 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3786 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3787 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3788 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3789 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3790 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3791 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3792 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3793 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3794 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3795 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3796 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3797 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3798 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3799 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3800 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3801 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3802 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3803 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3804 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3807 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3808 configuring glibc with:
3809 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3810 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3811 Implemented by H.J. Lu.
3815 + define static_assert
3817 + do not declare gets
3819 + declare at_quick_exit and quick_exit also for ISO C11
3821 + aligned_alloc. NB: The code is deliberately allows the size parameter
3822 to not be a multiple of the alignment. This is a moronic requirement
3823 in the standard but it is only a requirement on the caller, not the
3826 + timespec_get added
3828 + uchar.h support added
3830 + CMPLX, CMPLXF, CMPLXL added
3832 Implemented by Ulrich Drepper.
3834 * Support for the IA-64 has been moved to ports.
3836 * Remove support for anything but ELF binary format
3838 * Checking versions of poll, ppoll added.
3839 Implemented by Ulrich Drepper.
3841 * More generic and 64-bit performance optimizations to math functions.
3842 Implemented by Ulrich Drepper.
3844 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3845 headers and functions available at compile time as they were before
3846 version 2.14. This option will be removed at some time in the future
3847 after the TI-RPC library becomes fully sufficient for the needs of
3848 existing applications.
3850 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3851 Note that glibc is not expected to work with any Linux kernel version
3854 * New header <sys/auxv.h> and function getauxval allowing easy access to
3855 the AT_* key-value pairs passed from the Linux kernel. The header also
3856 defines the HWCAP_* bits associated with the AT_HWCAP key.
3858 * New locales: mag_IN
3860 * New configure option --enable-systemtap builds SystemTap static probes
3861 into libc for setjmp and longjmp and into libpthread for various operations.
3862 So far the setjmp/longjmp probes and some of the libpthread probes are
3863 provided only for i*86 and x86_64.
3864 Implemented by Roland McGrath and Rayson Ho.
3866 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3868 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3871 * More optimized functions for SPARC. Implemented by David S. Miller.
3873 * Improved support for cross-compilation, especially bootstrap builds
3874 without a previously built glibc.
3876 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3877 Chris Metcalf from Tilera.
3879 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3880 now supported for ARM processors.
3882 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3883 as the name of the dynamic linker, to distinguish it from the
3884 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3886 * Support for CRIS has been removed from ports.
3888 * A new class of installed header has been documented for low-level
3889 platform-specific functionality. PowerPC added the first instance with a
3890 function to provide time base register access. Contributed by Tulio
3891 Magno Quites Machado Filho.
3893 * ix86 configurations now install header files that are consistent with
3894 what x86-64 configurations install. These same header files can be used
3895 for -m32, -m64, or -mx32 builds.
3896 Contributed by H.J. Lu.
3898 * Math library bug fixes. A thorough audit of all open math library bugs was
3899 conducted by Joseph Myers. Significant progress was made on many math
3900 library bugs resulting in more accurate exceptions and function results.
3901 Many thanks to all those that contributed including Andreas Jaeger for his
3902 patch review and work on the x87 trigonometric instruction issues.
3904 * Timezone data is no longer installed. Timezone-related binaries and scripts
3905 will continue to be installed. Users should obtain their timezone data from
3906 their distribution provider or from the tzdata package at
3907 <ftp://munnari.oz.au/pub/>.
3911 * The following bugs are resolved with this release:
3913 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3914 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3915 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3916 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3917 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3918 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3919 13484, 13506, 13515, 13523, 13524, 13538, 13540
3921 * New program pldd to list loaded object of a process
3922 Implemented by Ulrich Drepper.
3924 * Add nss_db support back to glibc. No more dependency on Berkeley db
3925 and support for initgroups lookups.
3926 Implemented by Ulrich Drepper.
3928 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3929 Contributed by HJ Lu.
3931 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3932 Contributed by HJ Lu.
3934 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3935 on x86-32 and x86-64.
3936 Contributed by Liubov Dmitrieva.
3938 * Optimized strchr and strrchr for SSE on x86-32.
3939 Contributed by Liubov Dmitrieva.
3941 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3942 for x86-64 and x86-32.
3943 Contributed by Liubov Dmitrieva.
3945 * New interfaces: scandirat, scandirat64
3946 Implemented by Ulrich Drepper.
3948 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3949 Implemented by Ulrich Drepper.
3951 * nscd now also caches the netgroup database.
3952 Implemented by Ulrich Drepper.
3954 * Integrate libm with gcc's -ffinite-math-only option.
3955 Implemented by Ulrich Drepper.
3957 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3958 to math functions. Implemented by Ulrich Drepper.
3960 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3961 Implemented by Ulrich Drepper.
3963 * New Linux interfaces: process_vm_readv, process_vm_writev
3965 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3966 Implemented by Ulrich Drepper.
3968 * Optimized nearbyint and strcasecmp for PPC.
3969 Implemented by Adhemerval Zanella.
3971 * New locales: bho_IN, unm_US, es_CU, ta_LK
3975 * The following bugs are resolved with this release:
3977 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3978 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3979 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3980 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3981 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3982 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3983 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3984 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3985 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3986 12795, 12811, 12813, 12814, 12841
3988 * The RPC implementation in libc is obsoleted. Old programs keep working
3989 but new programs cannot be linked with the routines in libc anymore.
3990 Programs in need of RPC functionality must be linked against TI-RPC.
3991 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3993 Visible changes of this change include (obviously) the inability to link
3994 programs using RPC functions without referencing the TI-RPC library and the
3995 removal of the RPC headers from the glibc headers.
3996 Implemented by Ulrich Drepper.
3998 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3999 syncfs, setns, sendmmsg
4001 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4002 yue_HK, lij_IT, mhr_RU
4004 * New encodings: CP770, CP771, CP772, CP773, CP774
4006 * New program sotruss to trace calls through PLTs
4007 Implemented by Ulrich Drepper.
4009 * The malloc hook implementation is marked deprecated and will be removed
4010 from the default implementation in the next version. The design never
4011 worked ever since the introduction of threads. Even programs which do
4012 not create threads themselves can use multiple threads created internally.
4016 * The following bugs are resolved with this release:
4018 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4019 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4020 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4021 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4024 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4026 * POWER7 optimizations: memset, memcmp, strncmp
4028 * New optimized string functions for x86-64: strnlen (SSE2),
4029 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4030 Implemented by Ulrich Drepper.
4034 * The following bugs are resolved with this release:
4036 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4037 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4038 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4039 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4040 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4041 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4042 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4043 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4045 * New interfaces: pthread_getname_np, pthread_setname_np
4047 * New Linux interface: recvmmsg
4049 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4051 * The dynamic linker now recognizes supported ABI versions from the
4052 EI_ABIVERSION field in the ELF header.
4053 Implemented by Ulrich Drepper.
4055 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4056 will not be used to fill in password fields in the passwd.byname replies.
4057 Instead it is used to synthesize the shadow.byname table, should it be
4058 missing. This is a useful mode in some installations involving Solaris.
4059 Implemented by Ulrich Drepper.
4061 * New locales: kok_IN, sq_MK, cv_RU
4065 * The following bugs are resolved with this release:
4067 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4068 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4069 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4070 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4071 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4072 10789, 10817, 10823, 10840, 10847
4074 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4076 Implemented by Ulrich Drepper.
4078 * Checking version of longjmp added that fails if an uninitialized stack
4079 frame would be created. Implemented by Ulrich Drepper.
4081 * STT_GNU_IFUNC is now supported in static executables.
4082 Implemented by H.J. Lu.
4084 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4086 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4087 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4088 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4089 Contributed by H.J. Lu.
4091 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4092 Implemented by Ulrich Drepper.
4094 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4096 Contributed by H.J. Lu.
4098 * Support for fma instruction in AVX on x86-64.
4099 Implemented by H.J. Lu and Ulrich Drepper.
4101 * AVX support in x86-64 auditing support in ld.so.
4102 Implemented by H.J. Lu.
4104 * STB_GNU_UNIQUE support added.
4105 Implemented by Ulrich Drepper.
4107 * Implement second fallback mode for optimized DNS lookup for even more
4108 broken environments. If two requests from the same port are not
4109 handled correctly close the socket and open a new one before sending
4110 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4111 can be used to select this mode right away, instead of rediscovering the
4112 necessity is every process again.
4113 Implemented by Ulrich Drepper.
4115 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4116 Implemented by Adam Tkac.
4118 * Optimized iconv conversions for S390x.
4119 Implemented by Andreas Krebbel.
4121 * Using condvars with PI mutexes is now more efficient due to kernel
4122 support for requeueing to PI futexes. NPTL support added for x86-64.
4123 Implemented by Ulrich Drepper.
4125 * New locales: ps_AF, my_MM
4129 * The following bugs are resolved with this release:
4131 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4132 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4133 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4134 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4135 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4137 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4138 Implemented by Ulrich Drepper.
4140 * New Linux interfaces: accept4, fallocate, fallocate64.
4141 Implemented by Ulrich Drepper.
4143 * Correct declarations of string function when used in C++ code. This
4144 could lead to compile errors for invalid C++ code.
4146 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4149 * New POSIX 2008 interface: psiginfo
4150 Implemented by Ulrich Drepper.
4152 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4153 Implemented by Ulrich Drepper.
4155 * Support for selecting between multiple function definitions at runtime
4156 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4158 * The libcrypt library can now use the hash function implementations in
4159 NSS. Implemented by Ulrich Drepper.
4161 * The malloc implementation can be compiled to be less memory efficient
4162 but higher performing in multi-threaded programs.
4163 Implemented by Ulrich Drepper.
4165 * New locales: nan_TW@latin, ks_IN
4167 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4168 Implemented by Ulrich Drepper.
4170 * Extended printf hook support. It is possible to use user-defined types
4171 and extend existing format specifiers.
4172 Implemented by Ulrich Drepper.
4174 * Handling for group shadow files has been added.
4175 Implemented by Ulrich Drepper.
4177 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4178 servers (the case, e.g., for some people using the built-in DNS
4179 server in ADSL modems/routers). There is a once-per-process timeout
4180 in case of a broken server. To avoid it, users can run nscd or put
4181 'options single-request' in /etc/resolv.conf.
4182 Implemented by Ulrich Drepper.
4186 * The following bugs are resolved with this release:
4188 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4189 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4190 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4191 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4192 6968, 6974, 6980, 6995, 7008, 7009, 7029
4194 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4195 up at the same time. Implemented by Ulrich Drepper.
4197 * TLS descriptors for LD and GD on x86 and x86-64.
4198 Implemented by Alexandre Oliva.
4200 * getaddrinfo now handles DCCP and UDPlite.
4201 Implemented by Ulrich Drepper.
4203 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4204 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4205 Implemented by Ulrich Drepper.
4207 * New implementation of memmem, strstr, and strcasestr which is O(n).
4208 Implemented by Eric Blake.
4210 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4212 * Implement "e" option for popen to open file descriptor with the
4213 close-on-exec flag set. Implemented by Ulrich Drepper.
4215 * Implement "b" mode for fmemopen. In this mode writes writes don't
4216 implicitly add a NUL byte and seeks from the end of the buffer really
4217 use the buffer end, not the string length as the basis.
4218 Implemented by Ulrich Drepper.
4220 * Many functions, exported and internal, now atomically set the close-on-exec
4221 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4223 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4225 Implemented by Pravin Satpute.
4227 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4231 * The following bugs are resolved with this release:
4233 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4234 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4235 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4236 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4237 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4238 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4239 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4241 * New locales: bo_CN, bo_IN, shs_CA.
4243 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4245 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4246 Implemented by Pravin Satpute.
4248 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4250 * nscd caches now all timeouts for DNS entries
4251 Implemented by Ulrich Drepper.
4253 * nscd is more efficient and wakes up less often.
4254 Implemented by Ulrich Drepper.
4256 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4257 vdprintf, and obstack_vprintf.
4258 Implemented by Jakub Jelinek.
4260 * Faster memset for x86-64.
4261 Implemented by Harsha Jagasia and H.J. Lu.
4263 * Faster memcpy on x86.
4264 Implemented by Ulrich Drepper.
4266 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4267 Implemented by Ulrich Drepper.
4269 * Faster sqrt and sqrtf implemention for some PPC variants.
4270 Implemented by Steven Munroe.
4274 * The following bugs are resolved with this release:
4276 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4277 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4278 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4279 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4280 5071, 5103, 5104, 5112, 5113, 5184, 5186
4282 * More checking functions: fread, fread_unlocked, open*, mq_open.
4283 Implemented by Jakub Jelinek and Ulrich Drepper.
4285 * Extend fortification to C++. Implemented by Jakub Jelinek.
4287 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4288 by not recognizing 'a' as a modifier when those specs are requested.
4289 Implemented by Jakub Jelinek.
4291 * PPC optimizations to math and string functions.
4292 Implemented by Steven Munroe.
4294 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4295 options to be passed. Implemented by Ulrich Drepper.
4297 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4299 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4300 Implemented by Ulrich Drepper.
4302 * Handle private futexes in the NPTL implementation.
4303 Implemented by Jakub Jelinek and Ulrich Drepper.
4305 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4306 Implemented by Roland McGrath and Ulrich Drepper.
4308 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4310 * SHA-256 and SHA-512 based password encryption.
4311 Implemented by Ulrich Drepper.
4313 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4314 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4317 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4318 Implemented by Ulrich Drepper.
4322 * The following bugs are resolved with this release:
4324 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4325 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4326 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4327 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4328 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4329 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4330 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4333 * New Linux interfaces: epoll_pwait, sched_getcpu.
4335 * New generic interfaces: strerror_l.
4337 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4341 * The following bugs are resolved with this release:
4343 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4344 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4345 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4346 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4347 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4348 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4349 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4350 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4351 3225, 3251, 3252, 3253, 3273
4353 * For Linux, the sorting of addresses returned by getaddrinfo now also
4354 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4355 Implemented by Ulrich Drepper.
4357 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4358 Implemented by Ulrich Drepper.
4360 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4362 * New iconv module for MIK. Contributed by Alexander Shopov.
4364 * For sites with broken group and/or passwd database, the auto-propagate
4365 option of nscd can prevent creating ID lookup entries from the results
4366 of a name lookup and vice versa. This usually is no problem but some
4367 site might have problems with the default behavior.
4368 Implemented by Ulrich Drepper.
4370 * Iterating over entire database in NIS can be slow. With the
4371 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4372 to trade time for memory. The entire database will be read at once.
4373 Implemented by Ulrich Drepper.
4375 * The interfaces introduced in RFC 3542 have been implemented by
4378 * Support for the new ELF hash table format was added by Ulrich Drepper.
4380 * Support for priority inheritance mutexes added by Jakub Jelinek and
4383 * Support for priority protected mutexes added by Jakub Jelinek.
4385 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4386 or_IN, csb_PL, fy_NL, sr_ME.
4390 * More overflow detection functions.
4392 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4393 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4395 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4396 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4397 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4398 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4399 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4400 by Masahide Washizawa.
4402 * It is now possible to install audit libraries for the dynamic linker using
4403 LD_AUDIT. Implemented by Ulrich Drepper.
4405 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4406 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4407 For a libc and libpthread that works well on Linux 2.4 kernels, we
4408 recommend using the stable 2.3 branch.
4410 * The new function open_wmemstream acts like open_memstream,
4411 but uses a wchar_t wide character buffer.
4413 * The new function ppoll is an improved version of poll, similar to pselect.
4415 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4416 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4417 renameat, unlinkat, linkat, symlinkat, readlinkat.
4419 * New Linux kernel system calls: unshare,
4420 inotify_init, inotify_add_watch, inotify_rm_watch.
4422 * The euidaccess function is now also known by the alias eaccess,
4423 for compatibility with some other systems.
4425 * Timezone data updated to 2006b version.
4429 * The following bugs are resolved with this release:
4431 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4432 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4433 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4434 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4435 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4436 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4438 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4440 * As of this release, GCC 4 can be used to compile the C Library.
4442 * Timezone data updated to 2005m version.
4446 * The following bugs are resolved with this release:
4448 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4449 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4450 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4451 777, 787, 821, 822, 823, 825
4453 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4457 * Support for RFC 3678. Real implementations exist only for Linux so far.
4458 Implemented by Ulrich Drepper.
4460 * nscd can now cache entries persistently. Expiring entries are reloaded.
4461 For speedups the cache can be shared in memory with client processes.
4462 Implemented by Ulrich Drepper.
4464 * nscd can now perform SELinux checks.
4465 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4467 * getaddrinfo queries are now cached. Canonical name lookup is performed
4469 Implemented by Ulrich Drepper.
4471 * The nothrow function attribute is used when headers are used by gcc when
4472 compiling C code. This can avoid significant amounts of exception
4475 * The malloc functions perform more error checking and are stricter when
4476 it comes to reacting on errors. The default action is to terminate
4477 the process after showing an error message. Implemented by Ulrich Drepper.
4479 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4480 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4482 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4483 namespaces using the new function dlmopen(). This feature is of course,
4484 like most other dynamic loading functionality, not available in statically
4485 linked applications. Implemented by Ulrich Drepper.
4487 * Low-overhead boundary checking variants of string and some stdio functions
4488 were added. These are to be used in conjunction with a gcc patch by
4489 Jakub Jelinek which adds calls to these functions if possible.
4490 Implemented by Jakub Jelinek and Ulrich Drepper.
4492 * Old code for several operating systems and machine architectures that
4493 have not been in working condition in a long time have been removed from
4494 the main source tree maintained by the GNU C Library's maintainers.
4495 These files are now reside in the separate `ports' source module
4496 that is usable as an add-on when building the library.
4500 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4501 interrogate the dynamic linker, compatible with the Solaris interface.
4503 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4504 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4506 * getifaddrs now uses the netlink interface on Linux to get its information.
4507 Implemented by Thorsten Kukuk.
4509 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4510 Implemented by Ulrich Drepper.
4512 * support for non-executable stacks on x86 has been added. Changes mostly
4515 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4518 * getaddrinfo now performs destination address selection according to
4523 * Thread-safe interfaces for many functions that access locale data
4524 were added in version 2.3, but these features were omitted from NEWS.
4525 Many functions have variants with an `_l' suffix that take a `locale_t'
4526 object as a parameter rather than consulting the current locale.
4527 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4528 create and maintain `locale_t' objects. Additionally, the new function
4529 `uselocale' sets "the current locale" (as used by functions not so
4530 parameterized) set for an individual thread. These features were added
4531 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4533 * The functions getresuid, getresgid, setresuid, and setresgid, which
4534 have long been available on Linux, are now declared in <unistd.h>
4535 and are now also available on the Hurd.
4537 * ELF thread-local storage support (TLS) now works on x86-64.
4539 * The new dynamic string token $LIB is expanded in shared library names.
4540 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4542 * Aldy Hernandez contributed complete software floating point support for
4543 PowerPC machines with no FPU.
4545 * fexecve is implemented on Linux.
4547 * The `btowc' function should work at least twice as fast due to
4548 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4550 * With approriate thread add-ons cancelable functions are now implemented
4551 in libc.so as well. No need to call the function in libpthread. This
4552 change allowed to finally disable the incorrect and expensive handling
4553 of weak definition in ld.so.
4555 * Yet more PLT entries in libc.so have been removed. We finally arrived
4556 at the bare minimum. Startup times improved appropriately.
4558 * Support for the new Linux/x86 system call interface was added. The
4559 AT_SYSINFO auxiliary vector entry is recognized and handled.
4563 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4566 * iconv (the program and the interface) now accepts empty names (excluding
4567 options like //TRANSLIT) to mean "use charset of current locale".
4569 * localedef can now transliterate characters in strings which are not in
4570 the provided charmap. The information from the input locale is used.
4572 * Prelinking support was added for ELF targets. This requires additional
4573 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4575 * Read-only stdio streams now use mmap to speed up operation by eliminating
4576 copying and buffer underflows. To use add 'm' to the mode string of
4577 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4579 * The malloc functions were completely rewritten by Wolfram Gloger based
4580 on Doug Lea's malloc-2.7.0.c.
4582 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4583 implementation of regex.
4585 * Bruno Haible upgraded the iconv and locale implementation to support
4588 * Contents of the LC_* and LANG environment variables in the CEN style are
4589 not recognized anymore. It never was used. Change by Ulrich Drepper.
4591 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4592 thread-local storage (TLS) ABI on some platforms.
4593 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4595 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4596 EUC-JISX0213, and TSCII.
4598 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4599 BSD-compatible interface for getting all network interface addresses.
4600 Implementation for IPv4 by Roland McGrath.
4602 * Loading of locale data is faster due to the introduction of a locale
4603 archive. Implemented by Roland McGrath and Ulrich Drepper.
4605 * Startup times are significantly reduced by not using exported functions
4606 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4609 * Steven Munroe contributed a port to PowerPC64/Linux.
4613 * The Hurd now uses the GNU libio implementation of stdio rather than the
4614 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4616 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4617 with the same behavior as the Linux system call of the same name.
4621 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4622 128-bit long double format.
4624 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4625 IBM1161, and IBM1162 charsets.
4627 * Andreas Jaeger contributed a port to x86-64/Linux.
4629 * Peter Bruin contributed a port to PowerPC/Hurd.
4631 * libc functions using I/O streams now can handle wide-oriented streams
4634 * optimizations in the dynamic linker. Binaries created by recent binutils
4635 versions start up quicker due to reduced time spent on relocations.
4637 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4641 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4642 asinh, atanh, j0 for the 128-bit long double format.
4644 * Bruno Haible updated all the code handling Unicode in some form to
4645 support Unicode 3.1.
4647 * Speed of regex for single-byte locales is back to previous levels.
4648 Patch by Isamu Hasegawa.
4650 * Alpha, SPARC, and IA-64 now also using floating stacks.
4652 * Startup time of internationalized applications greatly improved through
4653 iconv cache. Use iconvconfig to generate the cache file.
4654 Contributed by Ulrich Drepper.
4656 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4657 severe performance problems. Patch by David Mosberger.
4659 * The Hurd port got a lot more functionality like AIO, various stdio
4660 extensions, etc. Mainly done by Roland McGrath.
4662 * mtrace can now lookup symbols in shared libraries.
4666 * Intel's IA-64 math library is largely integrated. It provides fast and
4667 accurate implementatations for most basic and standard math functions
4668 in float, double, and long double format.
4670 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4671 and asin for the 96-bit long double format and asin, log, tan for the
4672 128-bit long double format.
4674 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4675 The basic double functions exist today. Contributed by Abraham Ziv
4676 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4677 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4679 * An asynchronous name lookup library was added. The interface is designed
4680 after POSIX AIO. The proposal was circulated beforehand to get comments.
4681 No negative ones came in. Implemented by Ulrich Drepper.
4683 * Port to S390/64bit contributed by Martin Schwidefsky
4684 <schwidefsky@de.ibm.com>.
4686 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4687 of functions for Linux/IA-64.
4689 * The RPC code is now thread safe. Threads can now use the same service
4690 of different services at the same time. Patch by Eric Norum
4691 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4693 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4694 family of functions for Linux/S390.
4696 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4697 of functions for Linux/x86.
4699 * Port to Linux/CRIS contributed by Axis Communications.
4703 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4704 we can now check for namespace violations and missing declarations. The
4705 result is that almost all headers are now Unix-compliant (as defined in
4706 the upcoming XPG6). The negative side is that some programs might need
4707 corrections, too, if they depend on the incorrect form of the headers in
4708 previous versions which defined too many symbols and included too many
4711 * regex now handles multibyte character sets correctly.
4712 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4714 * iconv (the program) does now conform to the upcoming XPG6 and handles
4715 charmaps. Instead of the charset names the path of charmaps can be
4716 provided and the conversion happens based on this data.
4717 Contributed by Ulrich Drepper.
4719 * The locale program now provides detailed information about the installed
4724 only lists the names of the supported locales
4728 provides details such as country, language, and codeset name.
4729 Contributed by Ulrich Drepper.
4733 * The gencat program now parses the input file according to the charset
4734 selected by the LC_CTYPE category. This is important for stateful
4735 character sets. To make generating catalogs easier there is a way
4736 to overwrite the charset selected by the locale: before the first
4737 message or $ quote line the catalog can contain a line like
4739 $ codeset=ISO-8859-2
4741 to select the charset (ISO-8859-2 in this case).
4743 Implemented by Shinya Hanataka and Ulrich Drepper.
4745 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4746 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4747 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4749 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4750 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4752 * The LANGUAGE environment variable is now ignored unless the locale is
4753 changed from the default "C" locale.
4755 * The usual bug fixes.
4759 * Greg McGary added runtime support for bounds checking using gcc's
4760 new -fbounded-pointers option. ix86 target is complete. PowerPC
4763 * Thorsten Kukuk added secure mode support to nscd.
4765 * The Berkeley db libraries have been removed.
4767 Related, the nss_db module is now in a separate package since it
4768 obviously requires a database library being available.
4770 * Wide character I/O streams implemented by Ulrich Drepper.
4772 * Functions from the extended socket API added by Ulrich Drepper.
4774 * Functions feenableexcept and fedisableexcept to control the
4775 behaviour of individual exceptions have been added by Andreas Jaeger.
4777 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4779 * The resolver code has been updated from bind 8.2.3-T5B which supports
4780 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4783 This change could in some situations effect backward compatibility. Since
4784 now `_res' is a thread-local instead of a global variable, modifying it
4785 in one thread does not have any effect in other threads.
4787 The resolver library was also extended to allow IPv6 as the transport
4788 protocol for the requests. This work was done by Stig Venaas.
4790 * Compatibility code for K&R C compilers has been removed from the
4791 header files. A ISO C compiler is needed to use the library
4792 (conforming to either C89 or C99 standard).
4794 * Complete rewrite of the localedef program to support multibyte character
4795 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4796 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4797 Implemented by Ulrich Drepper.
4799 Bruno Haible significantly improved the generation and use of the data
4800 structures for the wide character tables.
4802 * Plural handling in gettext implemented by Ulrich Drepper.
4804 * The utmp daemon has been removed.
4806 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4808 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4811 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4813 * POSIX barriers implemented by Kaz Kylheku.
4815 * POSIX spawn function family implemented by Ulrich Drepper.
4817 * POSIX spinlocks are now available.
4819 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4821 * the configure option --enable-kernel=X.Y.Z allows to strip out
4822 compatibility for kernel versions before X.Y.Z. This is currently only
4823 implemented for Linux.
4825 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4826 field sin6_scope_id. This means that all programs using IPv6 should be
4827 recompiled. Don't expect binary compatibility with previous glibc
4830 * various conversion modules for IBM character sets contributed by
4833 * IA-64 port by Jes Sorensen and HJ Lu.
4847 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4849 * New xdr functions are added; some rpc functions are now 64bit clean.
4851 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4853 * Fixed known incompatibilities with glibc 2.0.
4855 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4857 * Optimized a number of functions (especially the ELF dynamic loader).
4859 * Update timezone data files.
4861 * lots of charmaps corrections
4863 * some new locale definitions and charmaps
4868 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4869 conform to POSIX member type requirements. Symbol versions have been
4870 adjusted as needed within the library, and for direct use by applications,
4871 but there is potential for problems if third-party libraries use
4872 struct timeval as part of their interface. This does not present
4873 a problem for X and other "essential" system libraries.
4875 * An additional locale model to support C++ Standard Library locale
4876 model and probably more was implemented by Ulrich Drepper.
4878 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4881 * Miles Bader provided the `argp' function family to support hierachical
4882 command line argument parsing, layered on top of getopt.
4884 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4886 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4889 * scanf recognizes the %a and %A format for scanning floating point numbers.
4891 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4892 information and interfaces for the available integer types.
4894 * about 130 new math functions were added to implement the ISO C9x math
4897 * the new header <complex.h> contains definitions of the complex math
4898 functions from ISO C 9X.
4900 * the new header <tgmath.h> defines generic macros to use complex or
4901 real valued functions.
4903 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4905 * Andreas Jaeger provided a test suite for the math library.
4907 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4909 * Ulrich Drepper added character set conversion functions (iconv).
4911 * Optimized string functions have been added.
4913 * The localedata addon is now part of glibc.
4915 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4917 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4918 daemon for NSS (nscd).
4920 Missing a better place here are some numbers on improvements. Under
4921 Linux 2.1.125 un-tar-ing the kernel sources takes
4925 using local files 12.19s 6.88s 22.91s
4927 using NIS 13.92s 8.91s 26.34s
4929 using NIS & nscd 10.37s 7.34s 25.30s
4931 using NIS+ 27.57s 30.37s 640.46s
4933 using NIS+ & nscd 10.25s 7.83s 26.51s
4935 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4937 Keep in mind that non-namelookup related operations dominate above times.
4938 It was just a common complain that using NIS+ unpacking the kernel is
4941 [1] The old nscd implementation is not available anymore since it was
4942 distributed with glibc up to version 2.0.98 and thus is now replaced.
4944 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4946 * Mark Kettenis provided a Hesiod NSS module.
4948 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4949 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4951 * rcmd can now handle netgroups (Dick Streefland).
4953 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4956 * Support for the IPv6 protocol has been added to the socket API, as per the
4957 latest draft standards.
4959 * Support for Linux 2.2 has been added.
4961 * Interface changes relative to the latest 2.0.x release:
4962 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4963 addseverity NEW: Unix98
4964 alphasort64 NEW: LFS
4965 argp_err_exit_status NEW: argp, GNU ext
4966 argp_error NEW: argp, GNU ext
4967 argp_failure NEW: argp, GNU ext
4968 argp_help NEW: argp, GNU ext
4969 argp_parse NEW: argp, GNU ext
4970 argp_program_bug_address NEW: argp, GNU ext
4971 argp_program_version NEW: argp, GNU ext
4972 argp_program_version_hook NEW: argp, GNU ext
4973 argp_state_help NEW: argp, GNU ext
4974 argp_usage NEW: argp, GNU ext
4975 authdes_create NEW: Secure RPC
4976 authdes_getucred NEW: Secure RPC
4977 authdes_pk_create NEW: Secure RPC
4978 backtrace NEW: GNU ext.
4979 backtrace_symbols NEW: GNU ext.
4980 backtrace_symbols_fd NEW: GNU ext.
4982 cacosf NEW: ISO C 9x
4983 cacosh NEW: ISO C 9x
4984 cacoshf NEW: ISO C 9x
4985 cacoshl NEW: ISO C 9x
4986 cacosl NEW: ISO C 9x
4993 casinf NEW: ISO C 9x
4994 casinh NEW: ISO C 9x
4995 casinhf NEW: ISO C 9x
4996 casinhl NEW: ISO C 9x
4997 casinl NEW: ISO C 9x
4999 catanf NEW: ISO C 9x
5000 catanh NEW: ISO C 9x
5001 catanhf NEW: ISO C 9x
5002 catanhl NEW: ISO C 9x
5003 catanl NEW: ISO C 9x
5004 cbc_crypt NEW: Secure RPC
5008 ccoshf NEW: ISO C 9x
5009 ccoshl NEW: ISO C 9x
5015 cimagf NEW: ISO C 9x
5016 cimagl NEW: ISO C 9x
5017 clearerr_locked REMOVED
5018 clntunix_create NEW: sunrpc ext
5020 clog10 NEW: ISO C 9x
5021 clog10f NEW: ISO C 9x
5022 clog10l NEW: ISO C 9x
5032 cprojf NEW: ISO C 9x
5033 cprojl NEW: ISO C 9x
5035 crealf NEW: ISO C 9x
5036 creall NEW: ISO C 9x
5041 csinhf NEW: ISO C 9x
5042 csinhl NEW: ISO C 9x
5045 csqrtf NEW: ISO C 9x
5046 csqrtl NEW: ISO C 9x
5050 ctanhf NEW: ISO C 9x
5051 ctanhl NEW: ISO C 9x
5053 des_setparity NEW: Secure RPC
5054 ecb_crypt NEW: Secure RPC
5055 endutxent NEW: Unix98
5057 exp10f NEW: ISO C 9x
5058 exp10l NEW: ISO C 9x
5062 fattach NEW: STREAMS
5063 fdetach NEW: STREAMS
5067 feclearexcept NEW: ISO C 9x
5068 fegetenv NEW: ISO C 9x
5069 fegetexceptflag NEW: ISO C 9x
5070 fegetround NEW: ISO C 9x
5071 feholdexcept NEW: ISO C 9x
5073 feraiseexcept NEW: ISO C 9x
5074 ferror_locked REMOVED
5075 fesetenv NEW: ISO C 9x
5076 fesetexceptflag NEW: ISO C 9x
5077 fesetround NEW: ISO C 9x
5078 fetestexcept NEW: ISO C 9x
5079 feupdateenv NEW: ISO C 9x
5080 fflush_locked REMOVED
5084 fgets_unlocked NEW: GNU ext.
5085 fileno_locked REMOVED
5097 fputc_locked REMOVED
5098 fputs_unlocked NEW: GNU ext.
5099 fread_unlocked NEW: GNU ext.
5104 fstatvfs NEW: Unix98
5108 ftruncate64 NEW: LFS
5110 fwrite_unlocked NEW: GNU ext.
5111 gai_strerror NEW: IPv6
5115 getchar_locked REMOVED
5117 getdate_err NEW: Unix98
5118 getdate_r NEW: GNU ext.
5120 getnameinfo NEW: IPv6
5121 getnetname NEW: Secure RPC
5122 getpmsg NEW: STREAMS
5123 getpt NEW: Unix98 PTY
5124 getrlimit64 NEW: LFS
5125 getutxent NEW: Unix98
5126 getutxid NEW: Unix98
5127 getutxline NEW: Unix98
5128 glob64 NEW: GNU ext.
5129 globfree64 NEW: GNU ext.
5130 gnu_get_libc_release NEW: GNU ext.
5131 gnu_get_libc_version NEW: GNU ext.
5132 grantpt NEW: Unix98 PTY
5133 host2netname NEW: Secure RPC
5135 iconv_close NEW: iconv
5136 iconv_open NEW: iconv
5137 if_freenameindex NEW: IPv6
5138 if_indextoname NEW: IPv6
5139 if_nameindex NEW: IPv6
5140 if_nametoindex NEW: IPv6
5141 in6addr_any NEW: IPv6
5142 in6addr_loopback NEW: IPv6
5143 inet6_isipv4mapped NEW: IPv6
5144 isastream NEW: STREAMS
5145 iswblank NEW: GNU ext.
5146 key_decryptsession NEW: Secure RPC
5147 key_decryptsession_pk NEW: Secure RPC
5148 key_encryptsession NEW: Secure RPC
5149 key_encryptsession_pk NEW: Secure RPC
5150 key_gendes NEW: Secure RPC
5151 key_get_conv NEW: Secure RPC
5152 key_secretkey_is_set NEW: Secure RPC
5153 key_setnet NEW: Secure RPC
5154 key_setsecret NEW: Secure RPC
5155 llrint NEW: ISO C 9x
5156 llrintf NEW: ISO C 9x
5157 llrintl NEW: ISO C 9x
5158 llround NEW: ISO C 9x
5159 llroundf NEW: ISO C 9x
5160 llroundl NEW: ISO C 9x
5165 lrintf NEW: ISO C 9x
5166 lrintl NEW: ISO C 9x
5167 lround NEW: ISO C 9x
5168 lroundf NEW: ISO C 9x
5169 lroundl NEW: ISO C 9x
5171 makecontext NEW: Unix98
5172 mempcpy NEW: GNU ext.
5175 modify_ldt NEW: kernel
5179 nearbyint NEW: ISO C 9x
5180 nearbyintf NEW: ISO C 9x
5181 nearbyintl NEW: ISO C 9x
5182 netname2host NEW: Secure RPC
5183 netname2user NEW: Secure RPC
5184 nexttoward NEW: ISO C 9x
5185 nexttowardf NEW: ISO C 9x
5186 nexttowardl NEW: ISO C 9x
5190 passwd2des NEW: Secure RPC
5192 pow10f NEW: GNU ext.
5193 pow10l NEW: GNU ext.
5196 printf_size NEW: GNU ext.
5197 printf_size_info NEW: GNU ext.
5198 profil_counter REMOVED
5199 pthread_mutexattr_getkind_np REPLACED
5200 pthread_mutexattr_setkind_np REPLACED
5201 ptsname NEW: Unix98 PTY
5202 ptsname_r NEW: Unix98 PTY
5204 putchar_locked REMOVED
5205 putgrent NEW: GNU ext.
5207 putpmsg NEW: STREAMS
5208 pututxline NEW: Unix98
5212 readdir64_r NEW: LFS
5213 remquo NEW: ISO C 9x
5214 remquof NEW: ISO C 9x
5215 remquol NEW: ISO C 9x
5217 roundf NEW: ISO C 9x
5218 roundl NEW: ISO C 9x
5220 scalbln NEW: ISO C 9x
5221 scalblnf NEW: ISO C 9x
5222 scalblnl NEW: ISO C 9x
5224 sendfile NEW: kernel
5225 setcontext NEW: Unix98
5226 setrlimit64 NEW: LFS
5227 setutxent NEW: Unix98
5229 sigignore NEW: Unix98
5230 sigqueue NEW: POSIX.1b
5231 sigrelse NEW: Unix98
5232 sigset NEW: POSIX.1b
5233 sigtimedwait NEW: POSIX.1b
5234 sigwaitinfo NEW: POSIX.1b
5235 sincos NEW: GNU ext.
5236 sincosf NEW: GNU ext.
5237 sincosl NEW: GNU ext.
5241 strcasestr NEW: GNU ext.
5242 strtoimax NEW: ISO C 9x
5243 strtoumax NEW: ISO C 9x
5244 strverscmp NEW: GNU ext.
5245 svcauthdes_stats NEW: Secure RPC
5246 svcunix_create NEW: sunrpc etx
5247 svcunixfd_create NEW: sunrpc ext
5248 swapcontext NEW: Unix98
5249 tcgetsid NEW: Unix98 PTY
5250 tdestroy NEW: GNU ext.
5251 tgamma NEW: ISO C 9x
5252 tgammaf NEW: ISO C 9x
5253 tgammal NEW: ISO C 9x
5257 truncf NEW: ISO C 9x
5258 truncl NEW: ISO C 9x
5260 unlockpt NEW: Unix98 PTY
5261 updwtmpx NEW: Unix98
5262 user2netname NEW: Secure RPC
5263 utmpxname NEW: Unix98
5264 versionsort NEW: GNU ext.
5265 versionsort64 NEW: GNU ext.
5267 wcscasecmp NEW: GNU ext.
5268 wcsncasecmp NEW: GNU ext.
5269 wcsnlen NEW: GNU ext.
5270 wcstoimax NEW: ISO C 9x
5271 wcstoll NEW: ISO C 9x
5272 wcstoull NEW: ISO C 9x
5273 wcstoumax NEW: ISO C 9x
5275 wordexp NEW: POSIX.2
5276 wordfree NEW: POSIX.2
5277 write_profiling REMOVED
5278 xdecrypt NEW: Secure RPC
5279 xdr_authdes_cred NEW: Secure RPC
5280 xdr_authdes_verf NEW: Secure RPC
5281 xdr_cryptkeyarg NEW: Secure RPC
5282 xdr_cryptkeyarg2 NEW: Secure RPC
5283 xdr_cryptkeyres NEW: Secure RPC
5284 xdr_getcredres NEW: Secure RPC
5285 xdr_key_netstarg NEW: Secure RPC
5286 xdr_key_netstres NEW: Secure RPC
5287 xdr_keybuf NEW: Secure RPC
5288 xdr_keystatus NEW: Secure RPC
5289 xdr_netnamestr NEW: Secure RPC
5290 xdr_sizeof NEW: Secure RPC
5291 xdr_unixcred NEW: sunrpc ext
5292 xencrypt NEW: Secure RPC
5293 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5304 * inet_ntoa is thread-safe
5306 * updwtmp is moved from libutil to libc
5308 * rewrite of cbrt function
5310 * update of timezone data
5324 * add atoll function
5326 * fix complex problems in Berkeley DB code
5328 * fix math functions
5332 * fixed lots of header problems (especially Linux/GNU specific)
5334 * dynamic loader preserves all registers
5336 * Roland McGrath provided support for handling of auxiliary objects in
5337 the ELF dynamic loader.
5339 * support for parallel builds is improved
5343 * GNU extensions are no longer declared by default. To enable them you
5344 must define the macro `_GNU_SOURCE' in your program or compile with
5347 * The library has changed from using GNU ld symbol aliases to using weak
5348 symbols where available. The ELF object file format supports weak
5349 symbols; GNU ld also supports weak symbols in the a.out format. (There
5350 is also now support for other GNU ld extensions in ELF. Use the
5351 `--with-elf' option to configure to indicate you have ELF, and
5352 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5353 of many files which contained only symbol aliases, reducing the size of
5354 the source and the compiled library; many other files were renamed to
5355 less cryptic names previously occupied by the symbol alias files.
5356 There is a new header file <elf.h> for programs which operate on
5357 files in the ELF format.
5359 * Converted to Autoconf version 2, so `configure' has more options.
5360 Run `configure --help' to see the details.
5362 * The library can now be configured to build profiling, highly-optimized
5363 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5364 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5365 `configure' enable building these extra libraries. The shared library is
5366 built by default when using both ELF and GNU ld. When shared libraries
5367 are enabled, the new library `-ldl' is available for arbitrary run-time
5368 loading of shared objects; its interface is defined in <dlfcn.h>. The
5369 new header file <link.h> gives access to the internals of the run-time
5370 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5371 application of same name on other systems and it provides information
5372 about dynamically linked binaries.
5374 * The C library now provides the run-time support code for profiling
5375 executables compiled with `-pg'. Programs can control the profiling code
5376 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5377 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5378 the support for this file format was contributed by David Mosberger-Tang.
5380 * The math code has been replaced with a math library based on fdlibm from
5381 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5382 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5383 functions. The math functions now reside in a separate library, so
5384 programs using them will need to use `-lm' their linking commands.
5386 * John C. Bowman contributed optimized ix87 assembler inline functions.
5388 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5389 mechanism similar to that found in Solaris 2. This is now used for the
5390 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5391 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5392 file controls what services are used for each individual database. This
5393 works by loading shared libraries with names specified in `nsswitch.conf',
5394 so service modules can be changed or added at any time without even
5395 relinking any program. Currently there are the file, db, and NIS based
5396 NSS services available.
5398 * The new functions `strtoq' and `strtouq' parse integer values from
5399 strings, like `strtol' and `strtoul', but they return `long long int' and
5400 `unsigned long long int' values, respectively (64-bit quantities).
5402 * The new functions `strtof' and `strtold' parse floating-point values from
5403 strings, like `strtod', but they return `float' and `long double' values,
5404 respectively (on some machines `double' and `long double' are the same).
5406 * Ulrich Drepper has contributed new implementations of the floating-point
5407 printing and reading code used in the `printf' family of functions and
5408 `strtod', `strtof', and `strtold'. These new functions are perfectly
5409 accurate, and much faster than the old ones.
5411 * The implementation of the POSIX locale model was completely rewritten by
5412 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5413 to compile the POSIX locale definition.
5415 * The former dummy implementations of the strcoll and strxfrm function are
5416 now replaced by fully functional code contributed by Ulrich Drepper. The
5417 collation information comes from the POSIX locale definitions.
5419 * The new header <langinfo.h> defines an interface for accessing
5420 various locale-dependent data (using the locale chosen with `setlocale').
5422 * Ulrich Drepper has contributed a new suite of functions for operation on
5423 wide-character and multibyte-character strings, in <wchar.h>;
5424 and classification and case conversion of wide characters, in <wctype.h>.
5425 These new functions are conforming to the ISO C, Amendement 1 specification.
5427 * There is now a second implementation of the standard I/O library available.
5428 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5429 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5431 * You can now use positional parameter specifications in format strings
5432 for the `printf' and `scanf' families of functions. For example,
5433 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5434 ``Number 6, Mr Jones''. This is mainly useful when providing different
5435 format strings for different languages, whose grammars may dictate
5436 different orderings of the values being printed. To support this
5437 feature, the interface for `register_printf_handler' has changed; see
5438 the header file <printf.h> for details.
5440 * The `printf' and `scanf' families of functions now understand a new
5441 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5442 to group numbers as indicated by the locale; for `scanf' and friends, this
5443 says to accept as valid only a number with all the proper grouping
5444 separators in the right places. In the default "C" locale, numbers are
5445 not grouped; but locales for specific countries will define the usual
5446 conventions (i.e. separate thousands with `,' in the US locale).
5448 * The pgrp functions have been regularized, slightly incompatibly but much
5449 less confusingly. The core functions are now `getpgid' and `setpgid',
5450 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5451 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5452 provided for compatibility. There is no longer an incompatible `getpgrp'
5453 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5455 * The new header file <fts.h> and suite of functions simplify programs that
5456 operate on directory trees. This code comes from 4.4 BSD.
5458 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5459 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5460 NSS scheme used in glibc.
5462 * There is a new malloc debugging hook `__memalign_hook'.
5464 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5465 `unsigned int' in <sys/types.h>. These are for compatibility only and
5466 their use is discouraged.
5468 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5469 done differently, so that it works even without GNU ld.
5471 * New function `euidaccess' checks allowed access to a file like `access',
5472 but using the effective IDs instead of the real IDs.
5474 * The time zone data files have been updated for the latest and greatest
5475 local time conventions of the countries of the world.
5477 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5480 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5481 for formatting floating-point numbers. They are provided only for
5482 compatibility; new programs should use `sprintf' instead. There are
5483 also equivalent function for the `long double' floating-point type and
5484 all functions also exist in a reentrant form.
5486 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5487 functions for maintaining the login-record files (primarily of use to
5488 system programs such as `login'), and convenient functions for
5489 allocating and initializing a pseudo-terminal (pty) device.
5491 * Ulrich Drepper has contributed new support for System V style
5492 shared memory and IPC on systems that support it.
5494 * Ulrich Drepper has contributed several miscellaneous new functions found
5495 in System V: The `hsearch' family of functions provide an effective
5496 implementation of hash tables; `a64l' and `l64a' provide a very simple
5497 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5500 * Ulrich Drepper has contributed new reentrant counterparts for the
5501 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5503 * Ulrich Drepper has contributed new, highly-optimized versions of several
5504 string functions for the i486/Pentium family of processors.
5506 * Ulrich Drepper has updated the Linux-specific code, based largely
5507 on work done in Hongjiu Lu's version of GNU libc for Linux.
5508 The GNU library now supports Linux versions 2.0.10 and later,
5509 using the ELF object file format (i[3456]86-*-linux).
5511 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5513 * David Mosberger-Tang and Richard Henderson have ported the C library
5514 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5515 dynamic linking support for ELF/Alpha.
5517 * Richard Henderson contributed several Alpha optimized assembler function
5518 for arithmetic and string handling.
5520 * Ulrich Drepper has contributed a new set of message catalog functions to
5521 support multiple languages using the <libintl.h> interface, for use with
5522 his new package GNU gettext. Translation volunteers have contributed
5523 catalogs of the library's messages in Spanish, German, and Korean.
5525 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5526 program and the `catgets' function for reading the catalog files it
5527 creates. (The <libintl.h> interface is preferred; we include the
5528 <nl_types.h> interface using `catgets' only for source compatibility with
5529 programs already written to use it.)
5531 * New header file <values.h> gives SVID-compatible names for <limits.h>
5534 * Various new macros, declarations, and small header files for compatibility
5537 * New function `group_member' is a convenient way to check if a process has
5538 a given effective group ID.
5540 * When using GCC 2.7 and later, the socket functions are now declared in a
5541 special way so that passing an argument of type `struct sockaddr_in *',
5542 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5543 `struct sockaddr *' type, does not generate a type-clash warning.
5545 * New function `error' declared in header file <error.h> is a convenient
5546 function for printing error messages and optionally exiting; this is the
5547 canonical function used in GNU programs. The new functions `err', `warn',
5548 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5549 doing the same thing.
5551 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5552 POSIX.2 `glob' function to do ~ and {...} expansion.
5554 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5555 `clearenv' which is used in POSIX.9 is also available.
5557 * New function `getsid' returns session ID number on systems that support it.
5559 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5560 files <db.h> and <mpool.h> provide a rich set of functions for several
5561 types of simple databases stored in memory and in files, and <ndbm.h> is
5562 an old `ndbm'-compatible interface using the `db' functions. Link with
5563 `-ldb' to get these functions.
5565 * New macro `strdupa' copies a string like `strdup', but uses local stack
5566 space from `alloca' instead of dynamic heap space from `malloc'.
5568 * New function `strnlen' is like `strlen' but searches only a given maximum
5569 number of characters for the null terminator. `stpncpy', `strndup' and
5570 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5573 * New function `statfs' in header <sys/statfs.h>.
5575 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5576 provide convenient functions for operating on blocks of null-terminated
5579 * A new suite of functions in <utmp.h> handle all the details of reading
5580 and writing the utmp file.
5582 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5585 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5586 completely POSIX compliant and also implemented the extended functionality
5587 to handle alternate digit representation and alternate era date formats.
5589 * Ulrich Drepper provided an implementation of the `strptime' function
5590 defined in XPG4.2 which transforms a string into a `struct tm' value.
5592 * Paul Eggert provided the tzselect shell script as part of the timezone
5593 code. The shell script makes it easy to select the correct timezone
5596 * The implementation of the malloc family of functions is completely replaced
5597 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5598 The implementation uses the mmap function (if available) and it is
5599 optimized for the use in multi threaded programs.
5601 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5602 functions. This new functionality is usable by specifying a special
5603 salt string and it is compatible with implementation on *BSD systems.
5605 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5606 `getsubopt' to handle second level command line options, `bsd_signal'
5607 to access BSD style `signal' functionality, the obsolete `regexp' style
5610 * the `lchown' function is available on system which support this
5613 * The implementation of the shadow password handling function was contributed
5616 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5618 * POSIX.1g support was added. The <sys/select.h> header is available,
5619 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5620 implementation of `getaddrinfo'.
5624 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5626 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5627 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5629 * The new function `daemon' from 4.4 BSD is useful for server programs that
5630 want to put themselves in the background.
5632 * Joel Sherrill has contributed support for several standalone boards that
5633 run without an operating system.
5635 * `printf', `scanf' and friends now accept a `q' type modifier for long
5636 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5638 * All of the code taken from BSD (notably most of the math and networking
5639 routines) has been updated from the BSD 4.4-Lite release.
5641 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5643 * The new functions `getdomainname' and `setdomainname' fetch or change the
5644 YP/NIS domain name. These are system calls which exist on systems which
5647 * The time zone data files have been updated for the latest international
5650 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5651 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5655 * The C library now includes support for Sun RPC, from Sun's free
5656 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5657 are included. (There is still no support for YP.)
5659 * Tom Quinn has contributed a port of the C library to SGI machines running
5660 Irix 4 (mips-sgi-irix4).
5662 * The new `lockf' function is a simplified interface to the locking
5663 facilities of `fcntl', included for compatibility.
5665 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5667 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5669 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5672 * The error message printed by `assert' for a failed assertion now includes
5673 the name of the program (if using GNU ld) and the name of the calling
5674 function (with versions of GCC that support this).
5676 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5678 * The library now includes the <sys/mman.h> header file and memory
5679 management functions `mmap', `munmap', `mprotect', `msync', and
5680 `madvise', on systems that support those facilities.
5682 * The interface for `mcheck' has changed slightly: the function called to
5683 abort the program when an allocation inconsistency is detected now takes
5684 an argument that indicates the type of failure. The new function
5685 `mprobe' lets you request a consistency check for a particular block at
5686 any time (checks are normally done only when you call `free' or `realloc'
5689 * It is now possible to easily cross-compile the C library, building on one
5690 system a library to run on another machine and/or operating system. All
5691 you need to do is set the variable `HOST_CC' in `configparms' to the
5692 native compiler for programs to run on the machine you are building on (a
5693 few generator programs are used on Unix systems); set `CC' to the
5696 * The new function `fexecve' (only implemented on the GNU system) executes
5697 a program file given a file descriptor already open on the file.
5701 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5702 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5704 * You can set the variable `libprefix' in `configparms' to specify a prefix
5705 to be prepended to installed library files; this makes it easy to install
5706 the GNU C library to be linked as `-lgnuc' or whatever.
5708 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5709 copies a limited number of characters from a string, and returns the
5710 address of the last character written.
5712 * You no longer need to check for whether the installed `stddef.h' is
5713 compatible with the GNU C library. configure now checks for you.
5715 * You can now define a per-stream `fileno' function to convert the
5716 stream's cookie into an integral file descriptor.
5718 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5719 allocates zero bytes of storage, and returns a unique pointer which
5720 you can pass to `realloc' or `free'. The behavior is undefined if
5721 you dereference this pointer.
5723 * The C library now runs on Sony NEWS m68k machines running either
5724 NewsOS 3 or NewsOS 4.
5726 * The new `syscall' function is a system-dependent primitive function
5727 for invoking system calls. It has the canonical behavior on Unix
5728 systems, including unreliable return values for some calls (such as
5729 `pipe', `fork' and `getppid').
5731 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5732 to `EAGAIN', which is the preferred name. On systems whose kernels
5733 use two distinct codes, the C library now translates EWOULDBLOCK to
5734 EAGAIN in every system call function.
5738 * The GNU C Library Reference Manual is now distributed with the library.
5739 `make dvi' will produce a DVI file of the printed manual.
5740 `make info' will produce Info files that you can read on line using C-h i
5741 in Emacs or the `info' program.
5742 Please send comments on the manual to bug-glibc-manual@gnu.org.
5744 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5746 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5748 * Jason Merrill has contributed a port to the Sequent Symmetry running
5749 Dynix version 3 (i386-sequent-dynix).
5751 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5752 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5754 * New function `memory_warnings' lets you arrange to get warnings when
5755 malloc is running out of memory to allocate, like Emacs gives you.
5757 * The C library now contains the relocating allocator used in Emacs 19 for
5758 its editing buffers. This allocator (ralloc) minimizes allocation
5759 overhead and fragmentation by moving allocated regions around whenever it
5760 needs to. You always refer to a ralloc'd region with a "handle" (a
5761 pointer to a pointer--an object of type `void **').
5763 * There is a new `printf' format: `%m' gives you the string corresponding
5764 to the error code in `errno'.
5766 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5767 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5768 pass, the `a' modifier says to fill in a `char **' you pass with a
5771 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5772 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5773 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5775 * `mkstemp' is a traditional Unix function to atomically create and open a
5776 uniquely-named temporary file.
5780 * The standard location for the file that says what the local timezone is
5781 has changed again. It is now `/usr/local/etc/localtime' (or more
5782 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5784 * The distribution no longer contains any files with names longer than 14
5787 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5788 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5790 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5794 * The configuration process has changed quite a bit. The `configure'
5795 script is now used just like the configuration scripts for other GNU
5796 packages. The `sysdeps' directory hierarchy is much rearranged.
5797 The file `INSTALL' explains the new scheme in detail.
5799 * The header files no longer need to be processed into ANSI C and
5800 traditional C versions. There is just one set of files to install, and
5801 it will work with ANSI or old C compilers (including `gcc -traditional').
5803 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5804 MIPS DECStation running Ultrix 4.
5806 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5807 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5808 made itself into a shared library.
5810 * Yet further improved support for the i386, running 4.3 BSD-like systems
5811 (such as Mach 3 with the Unix single-server), or System V.
5813 * New function `strncasecmp' to do case-insensitive string comparison
5814 with limited length.
5816 * New function `strsep' is a reentrant alternative to `strtok'.
5818 * New functions `scandir' and `alphasort' for searching directories.
5820 * New function `setenv' is a better interface to `putenv'.
5822 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5823 function for traversing a directory tree.
5825 * The GNU obstack package is now also part of the C library.
5826 The new function `open_obstack_stream' creates a stdio stream that
5827 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5828 formatted output directly to an obstack.
5830 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5831 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5833 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5835 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5836 things to your strings.
5838 * There are some new test programs: test-fseek, testmb, and testrand.
5840 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5841 These ports are not finished, but are a good starting place for really
5842 supporting those systems.
5844 * `/etc/localtime' is now the standard location for the file that says what
5845 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5846 This follows the general principle that `/etc' is the place for all local
5847 configuration files.
5849 * The C library header files now use `extern "C"' when used by the C++
5850 compiler, so the C library should now work with C++ code.
5852 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5853 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5856 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5857 function which uses the `merge sort' algorithm, and is said to be
5858 significantly faster than the old GNU `qsort' function. Merge sort is
5859 now the standard `qsort' function. The new algorithm can require a lot
5860 of temporary storage; so, the old sorting function is called when the
5861 required storage is not available.
5863 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5864 provides the Unix `crypt' function, plus some other entry points.
5866 * The code and header files taken from 4.4 BSD have been updated with the
5867 latest files released from Berkeley.
5869 ----------------------------------------------------------------------
5870 Copyright information:
5872 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5874 Permission is granted to anyone to make or distribute verbatim copies
5875 of this document as received, in any medium, provided that the
5876 copyright notice and this permission notice are preserved,
5877 thus giving the recipient permission to redistribute in turn.
5879 Permission is granted to distribute modified versions
5880 of this document, or of portions of it,
5881 under the above conditions, provided also that they
5882 carry prominent notices stating who last changed them.
5885 version-control: never