1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2019 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 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
13 enable features from the draft ISO C2X standard. Only some features from
14 this draft standard are supported by the GNU C Library, and as the draft
15 is under active development, the set of features enabled by this macro is
16 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
17 by compiling with "gcc -std=gnu2x".
19 * The <math.h> functions that round their results to a narrower type now
20 have corresponding type-generic macros in <tgmath.h>, as defined in TS
21 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
22 Clarification Request 13 to TS 18661-3.
24 Deprecated and removed features, and other changes affecting compatibility:
26 * The totalorder and totalordermag functions, and the corresponding
27 functions for other floating-point types, now take pointer arguments to
28 avoid signaling NaNs possibly being converted to quiet NaNs in argument
29 passing. This is in accordance with the resolution of Clarification
30 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
31 floating-point arguments directly will continue to work.
33 * The obsolete function stime is no longer available to newly linked
34 binaries and it has been removed from <time.h> header. This function
35 has been deprecated in favor of clock_settime.
37 Changes to build and runtime requirements:
39 [Add changes to build and runtime requirements here]
41 Security related changes:
43 [Add security related changes here]
45 The following bugs are resolved with this release:
47 [The release manager will add the list generated by
48 scripts/list-fixed-bugs.py just before the release.]
55 * Unicode 12.1.0 Support: Character encoding, character type info, and
56 transliteration tables are all updated to Unicode 12.1.0, using
57 generator scripts contributed by Mike FABIAN (Red Hat).
59 * The dynamic linker accepts the --preload argument to preload shared
60 objects, in addition to the LD_PRELOAD environment variable.
62 * The twalk_r function has been added. It is similar to the existing
63 twalk function, but it passes an additional caller-supplied argument
64 to the callback function.
66 * On Linux, the getdents64, gettid, and tgkill functions have been added.
68 * Minguo (Republic of China) calendar support has been added as an
69 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
72 * The entry for the new Japanese era has been added for ja_JP locale.
74 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
75 pvalloc, memalign, and posix_memalign fail now with total object size
76 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
77 pointer subtraction within the allocated object, where results might
78 overflow the ptrdiff_t type.
80 * The dynamic linker no longer refuses to load objects which reference
81 versioned symbols whose implementation has moved to a different soname
82 since the object has been linked. The old error message, symbol
83 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
84 link time reference, is gone.
86 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
87 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
88 functions. These behave similarly to their "timed" equivalents, but also
89 accept a clockid_t parameter to determine which clock their timeout should
90 be measured against. All functions allow waiting against CLOCK_MONOTONIC
91 and CLOCK_REALTIME. The decision of which clock to be used is made at the
92 time of the wait (unlike with pthread_condattr_setclock, which requires
93 the clock choice at initialization time).
95 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
96 work, new resolvers can use a second argument which can be extended in
97 the future, currently it contains the AT_HWCAP2 value.
99 Deprecated and removed features, and other changes affecting compatibility:
101 * The copy_file_range function fails with ENOSYS if the kernel does not
102 support the system call of the same name. Previously, user space
103 emulation was performed, but its behavior did not match the kernel
104 behavior, which was deemed too confusing. Applications which use the
105 copy_file_range function can no longer rely on glibc to provide a fallback
106 on kernels that do not support the copy_file_range system call, and if
107 this function returns ENOSYS, they will need to use their own fallback.
108 Support for copy_file_range for most architectures was added in version
109 4.5 of the mainline Linux kernel.
111 * The functions clock_gettime, clock_getres, clock_settime,
112 clock_getcpuclockid, clock_nanosleep were removed from the librt library
113 for new applications (on architectures which had them). Instead, the
114 definitions in libc will be used automatically, which have been available
117 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
118 and <sys/stropts.h> have been removed.
120 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
121 resolver flag (deprecated in glibc 2.25) have been removed.
123 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
124 resolver have been removed from <resolv.h>.
126 * With --enable-bind-now, installed programs are now linked with the
129 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
130 configurations) has been removed, following the deprecation of this
131 subarchitecture in version 8 of GCC, and its removal in version 9.
133 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
134 header have been removed.
136 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
137 deprecated and will be removed from a future version of glibc.
138 Application should directly access /proc instead. For obtaining random
139 bits, the getentropy function can be used.
141 Changes to build and runtime requirements:
143 * GCC 6.2 or later is required to build the GNU C Library.
145 Older GCC versions and non-GNU compilers are still supported when
146 compiling programs that use the GNU C Library.
148 Security related changes:
150 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
151 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
152 has undefined behavior. On x32, the size_t argument may be passed
153 in the lower 32 bits of the 64-bit RDX register with non-zero upper
154 32 bits. When it happened with the sign bit of RDX register set,
155 memcmp gave the wrong result since it treated the size argument as
156 zero. Reported by H.J. Lu.
158 CVE-2019-9169: Attempted case-insensitive regular-expression match
159 via proceed_next_node in posix/regexec.c leads to heap-based buffer
160 over-read. Reported by Hongxu Chen.
162 The following bugs are resolved with this release:
164 [2872] locale: Transliteration Cyrillic -> ASCII fails
165 [6399] libc: gettid() should have a wrapper
166 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
167 [16976] glob: fnmatch unbounded stack VLA for collating symbols
168 [17396] localedata: globbing for locale by [[.collating-element.]]
169 [18035] dynamic-link: pldd does no longer work, enters infinite loop
170 [18465] malloc: memusagestat is built using system C library
171 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
172 invalid input drops valid char
173 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
174 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
175 [21897] localedata: Afar locales: Fix mon, abmon, and abday
176 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
177 [23352] malloc: __malloc_check_init still defined in public header
179 [23403] nptl: Wrong alignment of TLS variables
180 [23501] libc: nftw() doesn't return dangling symlink's inode
181 [23733] malloc: Check the count before calling tcache_get()
182 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
184 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
185 [23844] nptl: pthread_rwlock_trywrlock results in hang
186 [23983] argparse: Missing compat versions of argp_failure and argp_error
187 for long double = double
188 [23984] libc: Missing compat versions of err.h and error.h functions for
190 [23996] localedata: Dutch salutations
191 [24040] libc: riscv64: unterminated call chain in __thread_start
192 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
194 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
195 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
197 [24114] regex: regexec buffer read overrun in "grep -i
198 '\(\(\)*.\)*\(\)\(\)\1'"
199 [24122] libc: Segfaults if 0 returned from la_version
200 [24153] stdio: Some input functions do not react to stdin assignment
201 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
202 RDX is set) (CVE-2019-7309)
203 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
204 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
205 not the default "nor"
206 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
207 false positives, change to modern flexible array
208 [24180] nptl: pthread_mutex_trylock does not use the correct order of
209 instructions while maintaining the robust mutex list due to missing
211 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
212 unnecessary librt dependencies
213 [24200] localedata: Revert first_weekday removal in en_IE locale
214 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
215 [24215] nptl: pthread_timedjoin_np should be a cancellation point
216 [24216] malloc: Check for large bin list corruption when inserting
218 [24228] stdio: old x86 applications that use legacy libio crash on exit
219 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
221 [24293] localedata: Missing Minguo calendar support for TW locales
222 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
224 [24307] localedata: Update locale data to Unicode 12.0.0
225 [24323] dynamic-link: dlopen should not be able open PIE objects
226 [24335] build: "Obsolete types detected" with Linux 5.0 headers
227 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
229 [24370] localedata: Add lang_name for tt_RU locale
230 [24372] locale: Binary locale files are not architecture independent
231 [24394] time: strptime %Ey mis-parses final year of era
232 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
234 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
236 [24531] malloc: Malloc tunables give tcache assertion failures
237 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
239 [24535] localedata: Update locale data to Unicode 12.1.0
240 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
241 kernels and break testing
242 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
243 [24556] build: [GCC 9] error: ā%sā directive argument is null
244 [-Werror=format-overflow=]
245 [24570] libc: alpha: compat msgctl uses __IPC_64
246 [24584] locale: Data race in __wcsmbs_clone_conv
247 [24588] stdio: Remove codecvt vtables from libio
248 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
250 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
251 [24632] stdio: Old binaries which use freopen with default stdio handles
253 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
255 [24652] localedata: szl_PL spelling correction
256 [24695] nss: nss_db: calling getpwent after endpwent crashes
257 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
258 in /etc/nsswitch.conf
259 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
260 [24740] libc: getdents64 type confusion
261 [24741] dynamic-link: ld.so should not require that a versioned symbol is
262 always implemented in the same library
263 [24744] libc: Remove copy_file_range emulation
264 [24757] malloc: memusagestat is linked against system libpthread
265 [24794] libc: Partial test suite run builds corrupt test-in-container
273 * The getcpu wrapper function has been added, which returns the currently
274 used CPU and NUMA node. This function is Linux-specific.
276 * A new convenience target has been added for distribution maintainers
277 to build and install all locales as directories with files. The new
278 target is run by issuing the following command in your build tree:
279 'make localedata/install-locale-files', with an optional DESTDIR
280 to set the install root if you wish to install into a non-default
283 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
285 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
286 for _GNU_SOURCE, to match BSD environments.
288 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
289 indicates that it will abort the transaction prior to entering the kernel
290 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
291 suspended, and this caused some undefined side-effects issues by aborting
292 transactions manually. Glibc avoided it by abort transactions manually on
293 each syscall, but it lead to performance issues on newer kernels where the
294 HTM state is saved and restore lazily (the state being saved even when the
295 process actually does not use HTM).
297 * The functions posix_spawn_file_actions_addchdir_np and
298 posix_spawn_file_actions_addfchdir_np have been added, enabling
299 posix_spawn and posix_spawnp to run the new process in a different
300 directory. These functions are GNU extensions. The function
301 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
304 * The popen and system do not run atfork handlers anymore (BZ#17490).
305 Although it is a possible POSIX violation, the POSIX rationale in
306 pthread_atfork documentation regarding atfork handlers is to handle
307 inconsistent mutex state after a fork call in a multi-threaded process.
308 In both popen and system there is no direct access to user-defined mutexes.
310 * Support for the C-SKY ABIV2 running on Linux has been added. This port
311 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
313 - C-SKY ABIV2 soft-float little-endian
314 - C-SKY ABIV2 hard-float little-endian
316 * strftime's default formatting of a locale's alternative year (%Ey)
317 has been changed to zero-pad the year to a minimum of two digits,
318 like "%y". This improves the display of Japanese era years during
319 the first nine years of a new era, and is expected to be harmless
320 for all other locales (only Japanese locales regularly have
321 alternative year numbers less than 10). Zero-padding can be
322 overridden with the '_' or '-' flags (which are GNU extensions).
324 * As a GNU extension, the '_' and '-' flags can now be applied to
325 "%EY" to control how the year number is formatted; they have the
326 same effect that they would on "%Ey".
328 Deprecated and removed features, and other changes affecting compatibility:
330 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
331 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
333 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
334 in <sys/procfs.h>, has been corrected to match the type actually used by
335 the Linux kernel. This affects the size and layout of that structure on
336 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
338 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
339 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
340 defined in <sys/procfs.h>, has been corrected to match the type actually
341 used by the Linux kernel. This affects the size and layout of those
344 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
345 meant to scan a string and allocate space for it with malloc, is now
346 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
347 defined. This extension conflicts with C99's use of '%a' to scan a
348 hexadecimal floating-point number, which is now available to programs
349 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
351 POSIX.1-2008 includes the feature of allocating a buffer for string input
352 with malloc, using the modifier letter 'm' instead. Programs using
353 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
354 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
355 C99 '%a' no longer need to avoid _GNU_SOURCE.
357 GCC's -Wformat warnings can detect most uses of this extension, as long
358 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
359 __attribute__ ((format (scanf, ...))).
361 Changes to build and runtime requirements:
363 * Python 3.4 or later is required to build the GNU C Library.
365 * On most architectures, GCC 5 or later is required to build the GNU C
366 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
368 Older GCC versions and non-GNU compilers are still supported when
369 compiling programs that use the GNU C Library.
371 Security related changes:
373 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
374 denial of service due to resource exhaustion when processing getaddrinfo
375 calls with crafted host names. Reported by Guido Vranken.
377 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
378 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
379 happened, accessing the 32-bit size_t value as the full 64-bit register
380 in the assembly string/memory functions would cause a buffer overflow.
383 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
384 addresses with arbitrary trailing characters, potentially leading to data
385 or command injection issues in applications.
387 The following bugs are resolved with this release:
389 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
390 [10496] localedata: 12h time representation in multiple locales faulty
391 [10797] localedata: it_IT locale numeric does not have a separator for
393 [11319] libc: dprintf doesn't handle errors properly
394 [16346] time: mktime: potentially unsafe use of localtime_offset
395 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
397 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
398 posix_spawn_file_actions_addfchdir_np
399 [17426] localedata: Indian locales: set the correct date format
400 [17490] stdio: popen should not invoke atfork handlers
401 [17783] libc: TIOCSER_TEMT conditions inconsistent
402 [18040] regex: use-after-free in regexec/get_subexp
403 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
404 [20018] network: getaddrinfo should reject IP addresses with trailing
405 characters (CVE-2016-10739)
406 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
407 [20271] libc: Missing "\n" in __libc_fatal calls
408 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
409 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
410 pointer argument is non-NULL
411 [21037] stdio: open_memstream and freopen
412 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
413 [21716] time: Crash in glibc's mktime in low-memory situations
414 [22834] stdio: Subprocess forked by popen may crash in Linux when
415 multithreads call popen
416 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
417 and pthread_create fails.
418 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
419 [23125] libc: riscv64: endless loop when throwing an exception from a
421 [23275] nptl: Race in pthread_mutex_lock while promoting to
422 PTHREAD_MUTEX_ELISION_NP.
423 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
425 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
427 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
429 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
430 [23509] dynamic-link: CET enabled glibc is incompatible with the older
432 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
433 [23521] nss: get_next_alias nss_files file stream leak
434 [23538] nptl: Hang in pthread_cond_broadcast
435 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
436 [23578] regex: Invalid memory access if regex pattern contains NUL byte
437 [23579] libc: Errors misreported in preadv2
438 [23597] build: support/test-container.c doesn't work with different
440 [23603] time: mktime signed integer overflow on large timestamps
441 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
442 [23614] libc: powerpc: missing CFI register information in __mpn_*
444 [23637] string: Generic strstr/strcasestr fails with huge needles
445 [23640] libc: no way to easily clear FD_CLOEXEC in
446 posix_spawn_file_actions_adddup2()
447 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
449 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
451 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
452 [23689] libc: Bug in documentation for rusage.ru_ixrss in
453 bits/types/struct_rusage.h
454 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
456 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
458 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
459 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
460 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
462 [23724] localedata: Albanian date formats are incorrect
463 [23735] math: libnldbl_nonshared.a references internal libm symbols
464 [23740] localedata: kl_GL: Month names and date formats need update
465 [23744] regex: regex refactorings to remove BE, avoid duplication
466 [23745] time: mktime fix for Gnulib + coreutils
467 [23758] time: Improve the width of alternate representation for year in
469 [23783] libc: [mips] Missing CMSPAR bits/termios.h
470 [23789] time: mktime does not set errno on failure
471 [23791] localedata: Wrong monetary format for ca_ES locale
472 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
473 [23794] locale: c16rtomb does not handle surrogate pairs
474 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
475 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
476 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
477 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
478 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
479 [23862] libc: [sh] missing kernel-features.h undefines
480 [23864] libc: [riscv] missing kernel-features.h undefines
481 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
482 [23907] malloc: Incorrect double-free malloc tcache check disregards
484 [23913] libc: off-by-one in function maybe_script_execute in
485 sysdeps/posix/spawni.c
486 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
487 [23923] locale: Add --no-hard-links option to localedef
488 [23927] network: Linux if_nametoindex() does not close descriptor
490 [23961] math: powf can overflow to inf without setting errno in non-
491 nearest rounding mode
492 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
493 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
494 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
495 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
496 [24011] localedata: Fixed small type in comment for locale bs_BA
497 [24018] libc: gettext() may return NULL
498 [24022] build: riscv build failure with Linux kernel 4.20-rc7
499 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
500 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
502 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
503 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
505 [24046] localedata: en_US locale doesn't define date_fmt
506 [24063] manual: @var{errno} should be @code{errno}
507 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
508 [24088] libc: VSCR field is not being correctly read in ucontext_t on
510 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
512 [24097] string: Can't use 64-bit register for size_t in assembly codes for
514 [24110] hurd: SS_DISABLE never set in stack_t value returned by
516 [24112] network: Do not send DNS queries for non-host names (where all
517 answers will be rejected)
518 [24130] libc: alpha __remqu corrupts $f3 register
525 * The localization data for ISO 14651 is updated to match the 2016
526 Edition 4 release of the standard, this matches data provided by
527 Unicode 9.0.0. This update introduces significant improvements to the
528 collation of Unicode characters. This release deviates slightly from
529 the standard in that the collation element ordering for lowercase and
530 uppercase LATIN script characters is adjusted to ensure that regular
531 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
532 is not matched by [a-z]. With the update many locales have been
533 updated to take advantage of the new collation information. The new
534 collation information has increased the size of the compiled locale
535 archive or binary locales.
537 * The GNU C Library can now be compiled with support for Intel CET, AKA
538 Intel Control-flow Enforcement Technology. When the library is built
539 with --enable-cet, the resulting glibc is protected with indirect
540 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
541 compatible with all existing executables and shared libraries. This
542 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
543 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
544 capable of multi-byte NOPs, like x86-64 processors as well as Intel
545 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
546 x86_64 and x32 on non-CET processors. --enable-cet has been tested
547 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
550 * The GNU C Library now has correct support for ABSOLUTE symbols
551 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
552 relocated incorrectly or in some cases discarded. The GNU linker can
553 make use of the newer semantics, but it must communicate it to the
554 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
555 field) to indicate such support is required.
557 * Unicode 11.0.0 Support: Character encoding, character type info, and
558 transliteration tables are all updated to Unicode 11.0.0, using
559 generator scripts contributed by Mike FABIAN (Red Hat).
561 * <math.h> functions that round their results to a narrower type are added
562 from TS 18661-1:2014 and TS 18661-3:2015:
564 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
567 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
570 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
573 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
576 * Two grammatical forms of month names are now supported for the following
577 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
578 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
579 support two grammatical forms in abbreviated month names: Catalan, Greek,
582 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
583 include the support for two grammatical forms of month names.
585 * Building and running on GNU/Hurd systems now works without out-of-tree
588 * The renameat2 function has been added, a variant of the renameat function
589 which has a flags argument. If the flags are zero, the renameat2 function
590 acts like renameat. If the flag is not zero and there is no kernel
591 support for renameat2, the function will fail with an errno value of
592 EINVAL. This is different from the existing gnulib function renameatu,
593 which performs a plain rename operation in case of a RENAME_NOREPLACE
594 flags and a non-existing destination (and therefore has a race condition
595 that can clobber the destination inadvertently).
597 * The statx function has been added, a variant of the fstatat64
598 function with an additional flags argument. If there is no direct
599 kernel support for statx, glibc provides basic stat support based on
600 the fstatat64 function.
602 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
603 library if installed. libidn2 version 2.0.5 or later is recommended. If
604 libidn2 is not available, internationalized domain names are not encoded
605 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
606 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
607 with an encoding error.) Flags which used to change the IDN encoding and
608 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
609 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
610 deprecated. They no longer have any effect.
612 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
613 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
614 range of ELF gABI expressions including such constructs as
615 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
616 have been further restricted, and where in the past a dynamic string
617 token sequence may have been interpreted as a literal string it will
618 now cause a load failure. These load failures were always considered
619 unspecified behaviour from the perspective of the dynamic loader, and
620 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
621 results in a load failure now.
623 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
624 implementation includes all the standard functions provided by
627 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
628 thrd_detach, thrd_exit, and thrd_join for thread management.
630 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
631 mtx_destroy for mutual exclusion.
633 - call_once for function call synchronization.
635 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
636 cnd_wait for conditional variables.
638 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
640 Application developers must link against libpthread to use ISO C threads.
642 Deprecated and removed features, and other changes affecting compatibility:
644 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
645 installed. Software that was using either header should be updated to
646 use standard <stdio.h> interfaces instead.
648 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
649 This was never required by the C standard, and the macros just expanded
650 to call alternative names for the same functions. If you hoped getc and
651 putc would provide performance improvements over fgetc and fputc, instead
652 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
653 necessary, flockfile and funlockfile.
655 * All stdio functions now treat end-of-file as a sticky condition. If you
656 read from a file until EOF, and then the file is enlarged by another
657 process, you must call clearerr or another function with the same effect
658 (e.g. fseek, rewind) before you can read the additional data. This
659 corrects a longstanding C99 conformance bug. It is most likely to affect
660 programs that use stdio to read interactive input from a terminal.
663 * The macros 'major', 'minor', and 'makedev' are now only available from
664 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
665 headers that happen to include <sys/types.h>. These macros are rarely
666 used, not part of POSIX nor XSI, and their names frequently collide with
667 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
670 <sys/sysmacros.h> is a GNU extension. Portable programs that require
671 these macros should first include <sys/types.h>, and then include
672 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
674 * The tilegx*-*-linux-gnu configurations are no longer supported.
676 * The obsolete function ustat is no longer available to newly linked
677 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
678 function has been deprecated in favor of fstatfs and statfs.
680 * The obsolete function nfsservctl is no longer available to newly linked
681 binaries. This function was specific to systems using the Linux kernel
682 and could not usefully be used with the GNU C Library on systems with
683 version 3.1 or later of the Linux kernel.
685 * The obsolete function name llseek is no longer available to newly linked
686 binaries. This function was specific to systems using the Linux kernel
687 and was not declared in a header. Programs should use the lseek64 name
688 for this function instead.
690 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
691 getaddrinfo and getnameinfo functions have been deprecated. The behavior
692 previously selected by them is now always enabled.
694 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
695 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
696 restriction (rejecting '_' in host names, among other things) has been
697 removed, for increased compatibility with non-IDN name resolution.
699 * The fcntl function now have a Long File Support variant named fcntl64. It
700 is added to fix some Linux Open File Description (OFD) locks usage on non
701 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
702 fcntl and LFS support is handled transparently. Also for Linux, the OFD
703 locks act as a cancellation entrypoint.
705 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
706 ecb_crypt, and des_setparity are no longer available to newly linked
707 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
708 longer installed. These functions encrypted and decrypted data with the
709 DES block cipher, which is no longer considered secure. Software that
710 still uses these functions should switch to a modern cryptography library,
713 * Reflecting the removal of the encrypt and setkey functions above, the
714 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
715 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
718 * The obsolete function fcrypt is no longer available to newly linked
719 binaries. It was just another name for the standard function crypt,
720 and it has not appeared in any header file in many years.
722 * We have tentative plans to hand off maintenance of the passphrase-hashing
723 library, libcrypt, to a separate development project that will, we hope,
724 keep up better with new passphrase-hashing algorithms. We will continue
725 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
726 'crypt_r' should not need to change at all; however, distributions will
727 need to install <crypt.h> and libcrypt from a separate project.
729 In this release, if the configure option --disable-crypt is used, glibc
730 will not install <crypt.h> or libcrypt, making room for the separate
731 project's versions of these files. The plan is to make this the default
732 behavior in a future release.
734 Changes to build and runtime requirements:
736 GNU make 4.0 or later is now required to build glibc.
738 Security related changes:
740 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
741 been fixed by removing the glibc-internal IDNA implementation and using
742 the system-provided libidn2 library instead. Originally reported by Hanno
743 Bƶck and Christian Weisgerber.
745 CVE-2017-18269: An SSE2-based memmove implementation for the i386
746 architecture could corrupt memory. Reported by Max Horn.
748 CVE-2018-11236: Very long pathname arguments to realpath function could
749 result in an integer overflow and buffer overflow. Reported by Alexey
752 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
753 architecture could write beyond the target buffer, resulting in a buffer
754 overflow. Reported by Andreas Schwab.
756 The following bugs are resolved with this release:
758 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
759 [6889] manual: 'PWD' mentioned but not specified
760 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
761 when __WORDSIZE != 64
762 [13762] regex: re_search etc. should return -2 on memory exhaustion
763 [13888] build: /tmp usage during testing
764 [13932] math: dbl-64 pow unexpectedly slow for some inputs
765 [14092] nptl: Support C11 threads
766 [14095] localedata: Review / update collation data from Unicode / ISO
768 [14508] libc: -Wformat warnings
769 [14553] libc: Namespace pollution loff_t in sys/types.h
770 [14890] libc: Make NT_PRFPREG canonical.
771 [15105] libc: Extra PLT references with -Os
772 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
774 [16335] manual: Feature test macro documentation incomplete and out of
776 [16552] libc: Unify umount implementations in terms of umount2
777 [17082] libc: htons et al.: statement-expressions prevent use on global
778 scope with -O1 and higher
779 [17343] libc: Signed integer overflow in /stdlib/random_r.c
780 [17438] localedata: pt_BR: wrong d_fmt delimiter
781 [17662] libc: please implement binding for the new renameat2 syscall
782 [17721] libc: __restrict defined as /* Ignore */ even in c11
783 [17979] libc: inconsistency between uchar.h and stdint.h
784 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
785 [18023] libc: extend_alloca is broken (questionable pointer comparison,
786 horrible machine code)
787 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
789 [18471] libc: llseek should be a compat symbol
790 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
792 [18991] nss: nss_files skips large entry in database
793 [19239] libc: Including stdlib.h ends up with macros major and minor being
795 [19463] libc: linknamespace failures when compiled with -Os
796 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
797 [19527] locale: Normalized charset name not recognized by setlocale
798 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
799 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
801 [19728] network: out of bounds stack read in libidn function
802 idna_to_ascii_4i (CVE-2016-6261)
803 [19729] network: out of bounds heap read on invalid utf-8 inputs in
804 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
805 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
807 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
808 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
809 [20419] dynamic-link: files with large allocated notes crash in
811 [20530] libc: bswap_16 should use __builtin_bswap16() when available
812 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
813 [20980] manual: CFLAGS environment variable replaces vital options
814 [21163] regex: Assertion failure in pop_fail_stack when executing a
815 malformed regexp (CVE-2015-8985)
816 [21234] manual: use of CFLAGS makes glibc detect no optimization
817 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
818 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
819 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
820 [21508] locale: intl/tst-gettext failure with latest msgfmt
821 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
822 [21812] network: getifaddrs() returns entries with ifa_name == NULL
823 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
825 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
827 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
828 [22247] network: Integer overflow in the decode_digit function in
829 puny_decode.c in libidn (CVE-2017-14062)
830 [22342] nscd: NSCD not properly caching netgroup
831 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
832 [22550] localedata: es_ES locale (and other es_* locales): collation
833 should treat Ʊ as a primary different character, sync the collation
834 for Spanish with CLDR
835 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
836 by gcc configured with --enable-default-pie
837 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
838 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
839 crossing 2GB threshold (CVE-2017-18269)
840 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
842 [22735] time: Misleading typo in time.h source comment regarding
844 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
845 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
846 `__assert_perror_fail ()' to `__assert_fail_base ()'
847 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
849 [22786] libc: Stack buffer overflow in realpath() if input size is close
850 to SSIZE_MAX (CVE-2018-11236)
851 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
852 through an absolute DT_NEEDED path
853 [22792] build: tcb-offsets.h dependency dropped
854 [22797] libc: pkey_get() uses non-reserved name of argument
855 [22807] libc: PTRACE_* constants missing for powerpc
856 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
857 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
858 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
859 [22848] localedata: ca_ES: update date definitions from CLDR
860 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
861 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
862 [22896] localedata: Update locale data for an_ES
863 [22902] math: float128 test failures with GCC 8
864 [22918] libc: multiple common of `__nss_shadow_database'
865 [22919] libc: sparc32: backtrace yields infinite backtrace with
867 [22926] libc: FTBFS on powerpcspe
868 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
870 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
871 [22947] libc: FAIL: misc/tst-preadvwritev2
872 [22963] localedata: cs_CZ: Add alternative month names
873 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
874 [22996] localedata: change LC_PAPER to en_US in es_BO locale
875 [22998] dynamic-link: execstack tests are disabled when SELinux is
877 [23005] network: Crash in __res_context_send after memory allocation
879 [23007] math: strtod cannot handle -nan
880 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
881 [23036] regex: regex equivalence class regression
882 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
883 [23069] libc: sigaction broken on riscv64-linux-gnu
884 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
885 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
886 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
887 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
888 and libc build with -Os)
889 [23140] localedata: More languages need two forms of month names
890 [23145] libc: _init/_fini aren't marked as hidden
891 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
892 [23171] math: C++ iseqsig for long double converts arguments to double
893 [23178] nscd: sudo will fail when it is run in concurrent with commands
894 that changes /etc/passwd
895 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
897 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
898 [23208] localedata: New locale - Lower Sorbian (dsb)
899 [23233] regex: Memory leak in build_charclass_op function in file
901 [23236] stdio: Harden function pointers in _IO_str_fields
902 [23250] nptl: Offset of __private_ss differs from GCC
903 [23253] math: tgamma test suite failures on i686 with -march=x86-64
904 -mtune=generic -mfpmath=sse
905 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
907 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
908 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
910 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
911 [23277] math: nan function should not have const attribute
912 [23279] math: scanf and strtod wrong for some hex floating-point
913 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
915 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
916 [23303] build: undefined reference to symbol
917 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
918 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
920 [23313] stdio: libio vtables validation and standard file object
922 [23329] libc: The __libc_freeres infrastructure is not properly run across
924 [23349] libc: Various glibc headers no longer compatible with
926 [23351] malloc: Remove unused code related to heap dumps and malloc
928 [23363] stdio: stdio-common/tst-printf.c has non-free license
929 [23396] regex: Regex equivalence regression in single-byte locales
930 [23422] localedata: oc_FR: More updates of locale data
931 [23442] build: New warning with GCC 8
932 [23448] libc: Out of bounds access in IBM-1390 converter
933 [23456] libc: Wrong index_cpu_LZCNT
934 [23458] build: tst-get-cpu-features-static isn't added to tests
935 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
937 [23467] dynamic-link: x86/CET: A property note parser bug
944 * The GNU C Library can now be compiled with support for building static
945 PIE executables (See --enable-static-pie in INSTALL). These static PIE
946 executables are like static executables but can be loaded at any address
947 and provide additional security hardening benefits at the cost of some
948 memory and performance. When the library is built with --enable-static-pie
949 the resulting libc.a is usable with GCC 8 and above to create static PIE
950 executables using the GCC option '-static-pie'. This feature is currently
951 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
952 aarch64 with binutils 2.30 or later.
954 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
955 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
958 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
960 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
962 * In order to support faster and safer process termination the malloc API
963 family of functions will no longer print a failure address and stack
964 backtrace after detecting heap corruption. The goal is to minimize the
965 amount of work done after corruption is detected and to avoid potential
966 security issues in continued process execution. Reducing shutdown time
967 leads to lower overall process restart latency, so there is benefit both
968 from a security and performance perspective.
970 * The abort function terminates the process immediately, without flushing
971 stdio streams. Previous glibc versions used to flush streams, resulting
972 in deadlocks and further data corruption. This change also affects
973 process aborts as the result of assertion failures.
975 * On platforms where long double has the IEEE binary128 format (aarch64,
976 alpha, mips64, riscv, s390 and sparc), the math library now implements
977 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
978 These are the same interfaces added in version 2.26 for some platforms where
979 this format is supported but is not the format of long double.
981 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
982 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
983 implements interfaces for that type, as defined by ISO/IEC TS
984 18661-3:2015. These are corresponding interfaces to those supported for
987 * The math library now implements interfaces for the _Float32, _Float64 and
988 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
989 corresponding interfaces to those supported for _Float128.
991 * glibc now implements the memfd_create and mlock2 functions on Linux.
993 * Support for memory protection keys was added. The <sys/mman.h> header now
994 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
997 * The copy_file_range function was added.
999 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1001 * The ldconfig utility now processes `include' directives using the C/POSIX
1002 collation ordering. Previous glibc versions used locale-specific
1003 ordering, the change might break systems that relied on that.
1005 * Support for two grammatical forms of month names has been added.
1006 In a call to strftime, the "%B" and "%b" format specifiers will now
1007 produce the grammatical form required when the month is used as part
1008 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1009 required when the month is named by itself. For instance, in Greek
1010 and in many Slavic and Baltic languages, "%B" will produce the month
1011 in genitive case, and "%OB" will produce the month in nominative case.
1013 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1014 are all valid and will all accept any known form of month
1015 name---standalone or complete, abbreviated or full. In a call to
1016 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1017 the strings used by "%B" and "%b", respectively. New query
1018 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1019 used by "%OB" and "%Ob", respectively.
1021 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1022 define the strings for %OB and %Ob, respectively; these have the
1023 same syntax as "mon" and "abmon". These arrays are optional; if they
1024 are not provided then they have the same content as "mon" and "abmon",
1027 These features are provided for locales which define "alt_mon" and/or
1028 "ab_alt_mon" in their locale source data. This release includes such
1029 alternative month name data for the following languages: Belarusian,
1030 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1032 This feature is currently a GNU extension, but it is expected to
1033 be added to the next revision of POSIX, and it is also already
1034 available on some BSD-derived operating systems.
1036 This feature will cause existing statically compiled applications
1037 to fail to load locales and fall back to the builtin C/POSIX locales.
1038 See notes below for other changes affecting compatibility.
1040 * Support for the RISC-V ISA running on Linux has been added. This port
1041 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1042 for the following ISA and ABI pairs:
1048 Deprecated and removed features, and other changes affecting compatibility:
1050 * Statically compiled applications attempting to load locales compiled for the
1051 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1052 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1053 support for two grammatical forms of the month names, also extends the locale
1054 data binary format. Static applications needing locale support must be
1055 recompiled to match the runtime and data they are deployed with. In some
1056 distributions there is an upgrade window where dynamically linked applications
1057 may use a new library but the old locale data and also fall back to the
1058 builtin C/POSIX locales; restarting the application process is sufficient to
1061 * Support for statically linked applications which call dlopen is deprecated
1062 and will be removed in a future version of glibc. Applications which call
1063 dlopen need to be linked dynamically instead.
1065 * Support for old programs which use internal stdio data structures and
1066 functions is deprecated. This includes programs which use the C++ streams
1067 provided by libstdc++ in GCC 2.95. Programs which use the internal
1068 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1069 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1070 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1071 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1072 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1073 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1074 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1075 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1076 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1077 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1078 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1079 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1080 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1081 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1082 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1083 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1084 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1085 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1086 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1087 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1088 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1089 future version of glibc. Unlike other symbol removals, these old
1090 applications will not be supported using compatibility symbols.
1092 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1093 defined by <sys/ptrace.h>.
1095 * libm no longer supports SVID error handling (calling a user-provided
1096 matherr function on error) or the _LIB_VERSION variable to control error
1097 handling. (SVID error handling and the _LIB_VERSION variable still work
1098 for binaries linked against older versions of the GNU C Library.) The
1099 libieee.a library is no longer provided. math.h no longer defines struct
1100 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1101 TLOSS, PLOSS and HUGE.
1103 * The libm functions pow10, pow10f and pow10l are no longer supported for
1104 new programs. Programs should use the standard names exp10, exp10f and
1105 exp10l for these functions instead.
1107 * The mcontext_t type is no longer the same as struct sigcontext. On
1108 platforms where it was previously the same, this changes the C++ name
1109 mangling for interfaces involving this type.
1111 * The add-ons mechanism for building additional packages at the same time as
1112 glibc has been removed. The --enable-add-ons configure option is now
1115 * The --without-fp configure option is now ignored. Whether hardware
1116 floating-point instructions are used is now configured based on whether
1117 the compiler used at configure time (without any options implied by a
1118 --with-cpu= configure option) uses such instructions.
1120 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1121 the specified string can be parsed as a domain name.
1123 * In the malloc_info output, the <heap> element may contain another <aspace>
1124 element, "subheaps", which contains the number of sub-heaps.
1126 * The libresolv function p_secstodate is no longer supported for new
1129 * The tilepro-*-linux-gnu configuration is no longer supported.
1131 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1132 and will be removed in a future release. Software that is still using
1133 either header should be updated to use standard <stdio.h> interfaces
1136 libio.h was originally the header for a set of supported GNU extensions,
1137 but they have not been maintained as such in many years, they are now
1138 standing in the way of improvements to stdio, and we don't think there are
1139 any remaining external users. _G_config.h was never intended for public
1140 use, but predates the bits convention.
1142 Changes to build and runtime requirements:
1144 * bison version 2.7 or later is required to generate code in the 'intl'
1147 Security related changes:
1149 CVE-2009-5064: The ldd script would sometimes run the program under
1150 examination directly, without preventing code execution through the
1151 dynamic linker. (The glibc project disputes that this is a security
1152 vulnerability; only trusted binaries must be examined using the ldd
1155 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1156 suffered from a one-byte overflow during ~ operator processing (either
1157 on the stack or the heap, depending on the length of the user name).
1158 Reported by Tim RĆ¼hsen.
1160 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1161 would sometimes fail to free memory allocated during ~ operator
1162 processing, leading to a memory leak and, potentially, to a denial
1165 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1166 without GLOB_NOESCAPE, could write past the end of a buffer while
1167 unescaping user names. Reported by Tim RĆ¼hsen.
1169 CVE-2017-17426: The malloc function, when called with an object size near
1170 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1171 instead of NULL. This was a regression introduced with the new malloc
1172 thread cache in glibc 2.26. Reported by Iain Buclaw.
1174 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1175 to the allocation of too much memory. (This is not a security bug per se,
1176 it is mentioned here only because of the CVE assignment.) Reported by
1179 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1180 of the number of search path components. (This is not a security
1181 vulnerability per se because no trust boundary is crossed if the fix for
1182 CVE-2017-1000366 has been applied, but it is mentioned here only because
1183 of the CVE assignment.) Reported by Qualys.
1185 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1186 for AT_SECURE or SUID binaries could be used to load libraries from the
1189 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1190 succeeds without returning an absolute path due to unexpected behaviour
1191 of the Linux kernel getcwd syscall. Reported by halfdog.
1193 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1194 an object size near the value of SIZE_MAX, would return a pointer to a
1195 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1197 CVE-2018-6551: The malloc function, when called with an object size near
1198 the value of SIZE_MAX, would return a pointer to a buffer which is too
1199 small, instead of NULL.
1201 The following bugs are resolved with this release:
1203 [866] glob: glob should match dangling symlinks
1204 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1205 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1207 [5997] math: Very slow execution of sinf function
1208 [10580] localedata: hr_HR: updated locale
1209 [10871] locale: 'mon' array should contain both nominative and genitive
1211 [12349] localedata: eu_ES: incorrect thousands separator
1212 [13605] localedata: shn_MM: new Shan locale
1213 [13805] localedata: ru_RU: currency should use ',' as radix point
1214 [13953] localedata: km_KH: locale update
1215 [13994] localedata: mjw_IN: new locale
1216 [14121] build: make writes .mo files in po directory
1217 [14333] libc: Fix the race between atexit() and exit()
1218 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1219 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1221 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1222 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1223 width Latin characters
1224 [15332] localedata: es_CU: locale update
1225 [15436] stdio: Don't close or flush stdio streams on abort
1226 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1228 [16148] localedata: ca_ES: incorrect thousands separator
1229 [16750] dynamic-link: ldd should not try to execute the binaries
1231 [16777] localedata: pl_PL: incorrect thousands separator in locale
1232 [16905] localedata: hanzi: new collation
1233 [17563] localedata: cmn_TW: add hanzi collation
1234 [17750] localedata: wrong collation order of diacritics in most locales
1235 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1237 [17956] build: Build fails on missing definitions from header file
1238 nss/nss.h when Mozilla NSS is used for cryptography
1239 [18203] libc: realpath() does not handle unreachable paths correctly
1240 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1241 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1242 [18822] libc: Internal functions are called via PLT
1243 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1244 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1245 [19574] libc: glibc should support building static PIE binaries
1246 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1248 [19971] glob: glob: Do not skip entries with zero d_ino values
1249 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1250 [20008] localedata: km_KH: convert to translit_neutral
1251 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1252 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1253 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1254 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1255 [20498] localedata: miq_NI: new MĆskitu / Miskito (miq) language locale
1257 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1258 they're set, wrong errors returned by gaih_inet when lookup functions
1260 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1261 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1263 [20952] localedata: yuw_PG: new locale
1264 [21084] localedata: charmaps/IBM858: new codepage
1265 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1266 [21242] libc: assert gives pedantic warning in old gcc versions
1267 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1268 __regcall calling convention
1269 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1270 [21326] libc: C99 functions are not declared for C++11 and later if
1271 _GNU_SOURCE is not predefined by g++
1272 [21457] libc: sys/ucontext.h namespace
1273 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1274 [21660] math: GCC fails to compile a formula with tgmath.h
1275 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1276 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1277 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1278 [21684] math: tgmath.h handling of complex integers
1279 [21685] math: tgmath.h handling of bit-fields
1280 [21686] math: tgmath.h handling of __int128
1281 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1283 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1285 [21750] localedata: column width of characters incompatible with classical
1287 [21754] malloc: malloc: Perform as little work as possible after heap
1288 consistency check failures
1289 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1290 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1291 [21791] string: Unused XXX_chk_XXX functions in libc.a
1292 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1294 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1296 [21845] localedata: Added new Locale bho_NP
1297 [21853] localedata: Fix abday Which looks same as day in zh_SG
1298 [21854] localedata: Added New Locale en_SC
1299 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1300 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1301 _dl_runtime_resolve_avx_slow
1302 [21885] network: getaddrinfo: gethosts does not release resolver context
1303 on memory allocation failure
1304 [21899] libc: XPG4.2 sigaction namespace
1305 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1307 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1309 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1310 errno value, causing getaddrinfo to fail
1311 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1312 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1313 instead of EAI_NODATA
1314 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1315 constant PTRACE_SEIZE_DEVEL
1316 [21930] math: C-only gcc builtins used in <math.h> isinf
1317 [21932] network: Unpaired __resolv_context_get in generic get*_r
1319 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1320 [21944] libc: sigval namespace
1321 [21951] localedata: Update hanzi collation by stroke
1322 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1323 sysdeps/x86_64/fpu/e_expf.S
1324 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1325 allocation in syscall loops)
1326 [21959] localedata: Fix Country name for xh_ZA
1327 [21960] localedata: Fix abmon for bem_ZM
1328 [21966] math: AVX2 mathvec functions use FMA without checking
1329 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1330 [21971] localedata: Added New Locale for mfe_MU
1331 [21972] libc: assert macro requires operator== (int) for its argument type
1332 [21973] math: [sparc] libm missing sqrtl compat symbol
1333 [21974] libc: Remove __bb_init_func and __bb_exit_func
1334 [21982] string: stratcliff.c: error: assuming signed overflow does not
1336 [21986] stdio: __guess_grouping is called incorrectly
1337 [21987] math: [sparc32] wrong bits/long-double.h installed
1338 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1340 [22022] localedata: Missing country_name for mni_IN
1341 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1343 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1345 [22026] locale: iconv_open: heap overflow on gconv_init failure
1346 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1347 [22035] math: [m68k] bits/math-inline.h macro namespace
1348 [22038] localedata: Fix abbreviated weeks and months for Somali
1349 [22044] localedata: Remove redundant data for Limburgish Language
1350 [22050] malloc: Linking with -lmcheck does not hook
1351 __malloc_initialize_hook correctly
1352 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1353 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1354 [22070] localedata: charmaps/UTF-8: wcwidth for
1355 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1356 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1357 Jungseong and Jongseong) should be 0
1358 [22078] nss: nss_files performance issue in multi mode
1359 [22082] math: bits/math-finite.h exp10 condition
1360 [22086] libc: pcprofiledump incorrect cross-endian condition
1361 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1362 [22095] network: Name server address allocation memory leak in resolv.conf
1364 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1366 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1367 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1369 [22111] malloc: malloc: per thread cache is not returned when thread exits
1370 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1371 [22134] libc: [linux] implement fexecve with execveat
1372 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1374 [22145] libc: ttyname() gives up too early in the face of namespaces
1375 [22146] math: C++ build issue with float128 on x86_64
1376 [22153] nptl: nptl: save error code before process termination
1377 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1378 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1379 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1380 [22165] libc: [hppa] Text relocations in libc.so
1381 [22180] libc: destructor registered via __cxa_atexit is called twice
1382 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1383 symlinks") cause "make" segfaults
1384 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1386 [22207] libc: FAIL: stdlib/test-atexit-race
1387 [22225] math: nearbyint arithmetic moved before feholdexcept
1388 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1389 [22235] math: iscanonical in C++ and float128
1390 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1391 the svid compat wrapper
1392 [22244] math: ynf and yn are wrong without the svid compat wrapper
1393 [22273] libc: Improper assert in Linux posix_spawn implementation
1394 [22284] libc: -pg -pie doesn't work
1395 [22292] locale: localedef exits with error 4 when it should be error 1
1396 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1397 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1399 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1400 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1402 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1403 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1404 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1405 [22322] libc: [mips64] wrong bits/long-double.h installed
1406 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1407 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1409 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1410 [22343] malloc: Integer overflow in posix_memalign
1411 [22347] libc: getrandom() returns the number of bytes that were copied to
1412 the buffer even though the comments say "Return 0 on success and -1 on
1414 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1415 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1417 [22370] dynamic-link: Incorrect note padding check
1418 [22375] libc: malloc returns pointer from tcache_get when should return
1419 NULL (CVE-2017-17426)
1420 [22377] math: iseqsig, float128 and C++
1421 [22382] localedata: Error in tpi_PG locale
1422 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1423 inside the ASCII printable range
1424 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1426 [22403] localedata: Slash needs escaping in some locales
1427 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1428 [22409] network: res_hnok does not accept some host names used on the
1430 [22412] network: res_dnok, res_hnok should perform syntax checks
1431 [22413] network: ns_name_pton ignores syntactically invalid trailing
1433 [22415] stdio: setvbuf can lead to invalid free/segfault
1434 [22432] build: Non-deterministic build
1435 [22439] malloc: malloc_info should compute summary statistics for all sub-
1437 [22442] network: if_nametoindex could report index for the wrong
1438 networking interface
1439 [22446] build: aliasing violation calling readlink in handle_request
1440 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1441 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1442 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1443 __nscd_hash/__nss_hash
1444 [22463] network: p_secstodate overflow handling
1445 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1446 [22478] libc: sigwait can fail with EINTR
1447 [22505] libc: ldconfig processes include directive in locale-specific
1449 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1450 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1451 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1452 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1453 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1454 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1455 same as for Croatian
1456 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1457 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1458 [22577] libc: missing newline after "cannot allocate TLS data structures
1460 [22588] manual: manual/conf.texi: missing underscore in front of
1462 [22593] math: nextafter and nexttoward are declared with const attribute
1463 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1464 [22603] string: ia64 memchr overflows internal pointer check
1465 [22605] libc: SH clone does not set the exit code correctly
1466 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1468 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1469 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1470 modified in case of success
1471 [22614] build: gcc: error: unrecognized command line option ā-no-pieā
1472 [22615] manual: manual: ambiguous wording about errno value in case of
1474 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1476 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1477 binaries or if /proc is not mounted (CVE-2017-16997)
1478 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1479 [22630] build: $(no-pie-ldflag) is no longer effective
1480 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1481 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1482 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1483 [22637] nptl: guard size is subtracted from thread stack size instead of
1485 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1486 [22657] localedata: hu_HU: Avoid double space in date
1487 [22660] math: fmax, fmin sNaN handling on alpha
1488 [22664] libc: New warning of GCC8
1489 [22665] math: alpha: ceil and floor raise inexact exceptions
1490 [22666] math: alpha: trunc raise inexact exceptions
1491 [22667] libc: makecontext lacks stack alignment on i386
1492 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1493 [22679] libc: getcwd(3) can succeed without returning an absolute path
1495 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1496 elision and tunables
1497 [22687] math: [powerpc-nofpu] complex long double functions spurious
1499 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1500 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1501 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1503 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1504 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1506 [22701] nis: Incomplete removal of libnsl
1507 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1508 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1509 [22715] dynamic-link: FAIL: elf/tst-audit10
1510 [22719] libc: Backtrace tests fail on hppa
1511 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1512 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1513 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1514 before the first call to crypt_r () in crypt/badsalttest.c
1521 * A per-thread cache has been added to malloc. Access to the cache requires
1522 no locks and therefore significantly accelerates the fast path to allocate
1523 and free small amounts of memory. Refilling an empty cache requires locking
1524 the underlying arena. Performance measurements show significant gains in a
1525 wide variety of user workloads. Workloads were captured using a special
1526 instrumented malloc and analyzed with a malloc simulator. Contributed by
1527 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1529 * Unicode 10.0.0 Support: Character encoding, character type info, and
1530 transliteration tables are all updated to Unicode 10.0.0, using
1531 generator scripts contributed by Mike FABIAN (Red Hat).
1532 These updates cause user visible changes, especially the changes in
1533 wcwidth for many emoji characters cause problems when emoji sequences
1534 are rendered with pango, see for example:
1535 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1537 * Collation of Hungarian has been overhauled and is now consistent with "The
1538 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1541 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1543 - The GNU C Library will now detect when /etc/resolv.conf has been
1544 modified and reload the changed configuration. The new resolver option
1545 āno-reloadā (RES_NORELOAD) disables this behavior.
1547 - The GNU C Library now supports an arbitrary number of search domains
1548 (configured using the āsearchā directive in /etc/resolv.conf);
1549 previously, there was a hard limit of six domains. For backward
1550 compatibility, applications that directly modify the ā_resā global
1551 object are still limited to six search domains.
1553 - When the ārotateā (RES_ROTATE) resolver option is active, the GNU C
1554 Library will now randomly pick a name server from the configuration as a
1555 starting point. (Previously, the second name server was always used.)
1557 * The tunables feature is now enabled by default. This allows users to tweak
1558 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1560 * New function reallocarray, which resizes an allocated block (like realloc)
1561 to the product of two sizes, with a guaranteed clean failure upon integer
1562 overflow in the multiplication. Originally from OpenBSD, contributed by
1563 Dennis Wƶlfing and RĆ¼diger Sonderfeld.
1565 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1566 These are extended versions of preadv and pwritev, respectively, taking an
1567 additional flags argument. The set of supported flags depends on the
1568 running kernel; full support currently requires kernel 4.7 or later.
1570 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1571 create a new session ID for the spawned process. This feature is
1572 scheduled to be added to the next major revision of POSIX; for the time
1573 being, it is available under _GNU_SOURCE.
1575 * errno.h is now safe to use from C-preprocessed assembly language on all
1576 supported operating systems. In this context, it will only define the
1577 Exxxx constants, as preprocessor macros expanding to integer literals.
1579 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1580 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1581 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1582 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1584 To compile programs that use this feature, the compiler must support
1585 128-bit floating point with the type name _Float128 (as defined by TS
1586 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1587 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1588 must be defined to make the new interfaces visible.
1590 The new functions and macros correspond to those present for other
1591 floating-point types (except for a few obsolescent interfaces not
1592 supported for the new type), with F128 or f128 suffixes; for example,
1593 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1594 printf or scanf formats for the new type; the strfromf128 and strtof128
1595 interfaces should be used instead.
1597 Deprecated and removed features, and other changes affecting compatibility:
1599 * The synchronization that pthread_spin_unlock performs has been changed to
1600 now be equivalent to a C11 atomic store with release memory order to the
1601 spin lock's memory location. Previously, several (but not all)
1602 architectures used stronger synchronization (e.g., containing what is
1603 often called a full barrier). This change can improve performance, but
1604 may affect odd fringe uses of spin locks that depend on the previous
1605 behavior (e.g., using spin locks as atomic variables to try to implement
1606 Dekker's mutual exclusion algorithm).
1608 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1611 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1612 will only be built and installed when the GNU C Library is configured with
1613 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1614 as TIRPC or rpcsvc-proto, to be used.
1616 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1617 libnss_compat, are deprecated, and will not be built or installed by
1620 The NIS(+) support library, libnsl, is also deprecated. By default, a
1621 compatibility shared library will be built and installed, but not headers
1622 or development libraries. Only a few NIS-related programs require this
1623 library. (In particular, the GNU C Library has never required programs
1624 that use 'gethostbyname' to be linked with libnsl.)
1626 Replacement implementations based on TIRPC, which additionally support
1627 IPv6, are available from <https://github.com/thkukuk/>. The configure
1628 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1629 name service modules, to be built and installed.
1631 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1632 support is enabled, the configured recursive resolver must support EDNS.
1633 (Responding to EDNS-enabled queries with responses which are not
1634 EDNS-enabled is fine, but FORMERR responses are not.)
1636 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1637 servers have not supported this opcode for a long time.
1639 * The _res_opcodes variable has been removed from libresolv. It had been
1640 exported by accident.
1642 * <string.h> no longer includes inline versions of any string functions,
1643 as this kind of optimization is better done by the compiler. The macros
1644 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1646 * The nonstandard header <xlocale.h> has been removed. Most programs should
1647 use <locale.h> instead. If you have a specific need for the definition of
1648 locale_t with no other declarations, please contact
1649 libc-alpha@sourceware.org and explain.
1651 * The obsolete header <sys/ultrasound.h> has been removed.
1653 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1655 * The obsolete function cfree has been removed. Applications should use
1658 * The stack_t type no longer has the name struct sigaltstack. This changes
1659 the C++ name mangling for interfaces involving this type.
1661 * The ucontext_t type no longer has the name struct ucontext. This changes
1662 the C++ name mangling for interfaces involving this type.
1664 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1665 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1666 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1667 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1668 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1669 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1670 fpregset_t type no longer has the name struct fpu. This changes the C++
1671 name mangling for interfaces involving those types.
1673 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1674 synced with the kernel:
1676 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1677 are not supported on this architecture and have been removed.
1679 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1680 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1681 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1683 Programs that assume the GET/SETREGS ptrace requests are universally
1684 available will now fail to build, instead of malfunctioning at runtime.
1686 Changes to build and runtime requirements:
1688 * Linux kernel 3.2 or later is required at runtime, on all architectures
1689 supported by that kernel. (This is a change from version 2.25 only for
1692 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1694 * On most architectures, GCC 4.9 or later is required to build the GNU C
1695 Library. On powerpc64le, GCC 6.2 or later is required.
1697 Older GCC versions and non-GNU compilers are still supported when
1698 compiling programs that use the GNU C Library. (We do not know exactly
1699 how old, and some GNU extensions to C may be _de facto_ required. If you
1700 are interested in helping us make this statement less vague, please
1701 contact libc-alpha@sourceware.org.)
1703 Security related changes:
1705 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1706 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1708 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1709 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1711 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1712 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1715 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1716 fixed (CVE-2017-12133).
1718 The following bugs are resolved with this release:
1720 [984] network: Respond to changed resolv.conf in gethostbyname
1721 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1722 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1724 [12189] libc: __stack_chk_fail should not attempt a backtrace
1726 [14096] time: Race condition on timezone/tst-timezone.out
1727 [14172] localedata: az_IR: new locale
1728 [14995] build: glibc fails to build if gold is the default linker, even if
1730 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1731 [16637] network: inet_pton function is accepting IPv6 with bad format
1732 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1733 x86 and other generic code
1734 [16875] localedata: ko_KR: fix lang_name
1735 [17225] localedata: ar_SY: localized month names for May and June are
1737 [17297] localedata: da_DK: wrong date_fmt string
1738 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1739 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1740 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1741 [19066] localedata: ar_SA abbreviated day and month names are in English
1742 [19569] network: resolv: Support an arbitrary number of search domains
1743 [19570] network: Implement random DNS server selection in the stub
1745 [19838] locale: localedef fails on PA-RISC
1746 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1747 order of 0D36 and 0D37
1748 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1750 [20098] libc: FAIL: debug/backtrace-tst on hppa
1751 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1753 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1755 [20313] localedata: Update locale data to Unicode 9.0
1756 [20424] manual: Document how to provide a malloc replacement
1757 [20496] localedata: agr_PE: new language locale AwajĆŗn / Aguaruna (agr)
1759 [20686] locale: Add el_GR@euro to SUPPORTED.
1760 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1761 failures consistently
1762 [21015] dynamic-link: Document and fix --enable-bind-now
1763 [21016] nptl: pthread_cond support is broken on hppa
1764 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1765 frame-pointer on i386
1766 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1768 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1769 [21088] libc: Build fails with --enable-static-nss
1770 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1771 generic c code is used
1772 [21109] libc: Tunables broken on big-endian
1773 [21112] math: powf has large ulp errors with base close to 1 and exponent
1775 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1777 [21120] malloc: glibc malloc is incompatible with GCC 7
1778 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1780 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1781 (-0.0) when linking with -lieee
1782 [21171] math: log10, log2 and lgamma return incorrect results
1783 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1784 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1785 [21207] localedata: ce_RU: update weekdays from CLDR
1786 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1787 [21217] localedata: Update months from CLDR-31
1788 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1789 [21243] libc: support_delete_temp_file should issue warning for failed
1791 [21244] libc: support resolv_test_start() socket fd close should be
1793 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1794 new posix_spawn implementation
1795 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1796 leads to lower CPU frequency
1797 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1798 [21261] libc: [sparc64] bits/setjmp.h namespace
1799 [21267] network: [mips] bits/socket.h IOC* namespace
1800 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1801 [21270] libc: mmap64 silently truncates large offset values
1802 [21275] libc: posix_spawn always crashes on ia64 now
1803 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1804 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1805 [21289] libc: Incorrect declaration for 32-bit platforms with
1806 _FILE_OFFSET_BITS=64 causes build error
1807 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1808 not support gethostbyname4_r
1809 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1811 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1813 [21340] libc: Support POSIX_SPAWN_SETSID
1814 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1815 [21359] network: ns_name_pack needs additional byte in destination buffer
1816 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1817 against fragmentation attacks (CVE-2017-12132)
1818 [21369] network: resolv: Remove EDNS fallback
1819 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1821 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1822 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1823 [21393] stdio: Missing dup3 error check in freopen, freopen64
1824 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1825 [21399] localedata: Bad description for U00EC in
1826 localedata/charmaps/CP1254
1827 [21411] malloc: realloc documentation error
1828 [21426] network: sys/socket.h uio.h namespace
1829 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1830 [21445] libc: signal.h bsd_signal namespace
1831 [21455] network: Network headers stdint.h namespace
1832 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1834 [21475] network: resolv: Overlong search path is truncated mid-label
1835 [21511] libc: sigstack namespace
1836 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1837 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1838 bits/syscall.h: No such file or directory
1839 [21517] libc: struct sigaltstack namespace
1840 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1841 [21533] localedata: Update locale data to Unicode 10.0
1843 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1844 junk at end of line, first unrecognized character is `@'
1845 [21538] libc: SIG_HOLD missing for XPG4
1846 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1847 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1848 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1849 [21543] libc: sigevent namespace
1850 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1851 size for general purpose registers in mcontext_t structure
1852 [21550] libc: sigwait namespace
1853 [21552] libc: XPG4 bsd_signal namespace
1854 [21554] libc: sigpause namespace
1855 [21560] libc: sys/wait.h signal.h namespace
1856 [21561] libc: waitid namespace
1857 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1858 '/usr/include/stdlib.h': Permission denied
1859 [21575] libc: sys/wait.h missing struct rusage definition
1860 [21584] libc: sigaltstack etc namespace
1861 [21597] libc: siginterrupt namespace
1862 [21607] math: hppa: FAIL: math/test-tgmath
1863 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1865 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1866 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1867 stack and heap (CVE-2017-1000366)
1868 [21625] libc: wait3 namespace
1869 [21654] nss: Incorrect pointer alignment in NSS group merge result
1871 [21657] network: Parse interface zone id for node-local multicast
1872 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1874 [21666] libc: .symver is used on common symbol
1875 [21668] network: resolv: res_init cross-thread broadcast introduces race
1877 [21687] math: tgmath.h totalorder, totalordermag return type
1878 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1880 [21696] libc: Incorrect assumption of of __cpu_mask in
1881 posix/sched_cpucount.c
1882 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1883 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1885 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1886 leading to relocation crash
1887 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1888 `resolv_conf_matches (resp, conf)' failed.
1889 [21710] localedata: Added Samoan language locale for Samoa
1890 [21711] localedata: Pashto yesstr/nostr locale are missing
1891 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1892 __have_pthread_attr_t can cause redefinition of typedef āpthread_attr_tā
1893 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1894 [21723] localedata: yesstr/nostr missing for Chinese language locale
1895 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1897 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1899 [21728] localedata: New Locale for Tongan language
1900 [21729] localedata: incorrect LC_NAME fields for hi_IN
1901 [21733] localedata: yesstr and nostr are missing for zh_HK
1902 [21734] localedata: Missing yesstr and nostr are for kw_GB
1903 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1904 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1905 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1906 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1908 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1910 [21749] localedata: Wrong abbreviated day name (āabdayā) for
1912 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1913 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1914 [21759] localedata: missing yesstr and nostr for Tigrinya
1915 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1916 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1917 [21767] localedata: Missing Bislama locales
1918 [21768] localedata: Missing yesstr and nostr for aa_ET
1919 [21770] localedata: Missing Field in li_NL
1920 [21778] nptl: Robust mutex may deadlock
1921 [21779] libc: MicroBlaze segfaults when loading libpthread
1922 [21783] localedata: Fix int_select international_call_prefixes
1923 [21784] localedata: Inconsistency in country_isbn
1924 [21788] localedata: Missing Country Postal Abbreviations
1925 [21794] localedata: Added-country_isbn-for-Italy
1926 [21795] localedata: Add/Fix country_isbn for France
1927 [21796] localedata: Added country_isbn for Republic of Korea
1928 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1929 [21799] localedata: Added int_select international_call_prefixes
1930 [21801] localedata: Added int_select international_call_prefixes
1931 [21804] nptl: Double semicolon in thread-shared-types.h
1932 [21807] localedata: LC_ADDRESS fix for pap_CW
1933 [21808] localedata: Fix LC_ADDRESS for pap_AW
1934 [21821] localedata: Added country_name in mai_IN
1935 [21822] localedata: Fix LC_TIME for mai_IN
1936 [21823] localedata: missing yesstr, nostr for sa_IN
1937 [21825] localedata: Fix name_mrs for mag_IN
1938 [21828] localedata: 2.26 changelog should mention user visible changes
1940 [21835] localedata: Added Maithili language locale for Nepal
1941 [21838] localedata: Removed redundant data for the_NP
1942 [21839] localedata: Fix LC_MONETARY for ta_LK
1943 [21844] localedata: Fix Latin characters and Months Sequence.
1944 [21848] localedata: Fix mai_NP Title Name
1949 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1950 24731-2:2010, is supported to enable declarations of functions from that
1951 TR. Note that not all functions from that TR are supported by the GNU C
1954 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1955 18661-1:2014, is supported to enable declarations of functions and macros
1956 from that TS. Note that not all features from that TS are supported by
1959 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1960 18661-4:2015, is supported to enable declarations of functions and macros
1961 from that TS. Note that most features from that TS are not supported by
1964 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1965 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1966 Since the GNU C Library defaults to a much newer revision of POSIX, this
1967 will only affect programs that specifically request an old conformance
1968 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1969 see a change in the visible declarations, but a program compiled with
1970 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1973 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1974 defined by all multithreaded code, but glibc has not required this for
1977 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1978 means that in a future release, the macros āmajorā, āminorā, and āmakedevā
1979 will only be available from <sys/sysmacros.h>.
1981 These macros are not part of POSIX nor XSI, and their names frequently
1982 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1983 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1984 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1987 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1988 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1989 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1991 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1992 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1993 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1994 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1995 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1996 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1997 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1998 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1999 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2000 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2001 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2004 * New <math.h> features are added from TS 18661-1:2014:
2006 - Signaling NaN macros: SNANF, SNAN, SNANL.
2008 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2009 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2010 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2012 - llogb functions: the llogb, llogbf and llogbl functions, and the
2013 FP_LLOGB0 and FP_LLOGBNAN macros.
2015 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2018 - Comparison macros: iseqsig.
2020 - Classification macros: iscanonical, issubnormal, iszero.
2022 - Total order functions: totalorder, totalorderf, totalorderl,
2023 totalordermag, totalordermagf, totalordermagl.
2025 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2027 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2028 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2030 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2031 are added to libc. They convert a floating-point number into string.
2033 * Most of glibc can now be built with the stack smashing protector enabled.
2034 It is recommended to build glibc with --enable-stack-protector=strong.
2035 Implemented by Nick Alcock (Oracle).
2037 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2038 intended to be used instead of memset() to erase sensitive data after use;
2039 the compiler will not optimize out calls to explicit_bzero even if they
2040 are "unnecessary" (in the sense that no _correct_ program can observe the
2041 effects of the memory clear).
2043 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2044 to float instead of double. This does not affect the ABI of any libraries
2045 that are part of the GNU C Library, but may affect the ABI of other
2046 libraries that use this type in their interfaces.
2048 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2049 float_t and double_t types are now defined to long double instead of float
2050 and double. These options are not the default, and this does not affect
2051 the ABI of any libraries that are part of the GNU C Library, but it may
2052 affect the ABI of other libraries that use this type in their interfaces,
2053 if they are compiled or used with those options.
2055 * The getentropy and getrandom functions, and the <sys/random.h> header file
2058 * The buffer size for byte-oriented stdio streams is now limited to 8192
2059 bytes by default. Previously, on Linux, the default buffer size on most
2060 file systems was 4096 bytes (and thus remains unchanged), except on
2061 network file systems, where the buffer size was unpredictable and could be
2062 as large as several megabytes.
2064 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2065 for the Linux quota interface which predates kernel version 2.4.22 has
2068 * The malloc_get_state and malloc_set_state functions have been removed.
2069 Already-existing binaries that dynamically link to these functions will
2070 get a hidden implementation in which malloc_get_state is a stub. As far
2071 as we know, these functions are used only by GNU Emacs and this change
2072 will not adversely affect already-built Emacs executables. Any undumped
2073 Emacs executables, which normally exist only during an Emacs build, should
2074 be rebuilt by re-running ā./configure; makeā in the Emacs build tree.
2076 * The āip6-dotintā and āno-ip6-dotintā resolver options, and the
2077 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2078 āno-ip6-dotintā had already been the default, and support for the
2079 āip6-dotintā option was removed from the Internet in 2006.
2081 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2082 flag from <resolv.h> have been removed. The option relied on a
2083 backwards-incompatible DNS extension which was never deployed on the
2086 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2087 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2088 They were already unimplemented.
2090 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2091 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2092 removed again from the IETF name lookup interface specification in RFC
2093 2553. Applications should use getaddrinfo instead.
2095 * DNSSEC-related declarations and definitions have been removed from the
2096 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2097 decode the data part of DNSSEC record types. Previous versions of glibc
2098 only implemented minimal support for the previous version of DNSSEC, which
2099 is incompatible with the currently deployed version.
2101 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2102 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2103 <arpa/nameser.h> header file because the distinction between RR types and
2104 meta-RR types is not officially standardized, subject to revision, and
2105 thus not suitable for encoding in a macro.
2107 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2108 and rhook members of the res_state type in <resolv.h> have been removed.
2109 The glibc stub resolver did not support these hooks, but the header file
2110 did not reflect that.
2112 * For multi-arch support it is recommended to use a GCC which has
2113 been built with support for GNU indirect functions. This ensures
2114 that correct debugging information is generated for functions
2115 selected by IFUNC resolvers. This support can either be enabled by
2116 configuring GCC with '--enable-gnu-indirect-function', or by
2117 enabling it by default by setting 'default_gnu_indirect_function'
2118 variable for a particular architecture in the GCC source file
2121 * GDB pretty printers have been added for mutex and condition variable
2122 structures in POSIX Threads. When installed and loaded in gdb these pretty
2123 printers show various pthread variables in human-readable form when read
2124 using the 'print' or 'display' commands in gdb.
2126 * Tunables feature added to allow tweaking of the runtime for an application
2127 program. This feature can be enabled with the '--enable-tunables' configure
2128 flag. The GNU C Library manual has details on usage and README.tunables has
2129 instructions on adding new tunables to the library.
2131 * A new version of condition variables functions have been implemented in
2132 the NPTL implementation of POSIX Threads to provide stronger ordering
2135 * A new version of pthread_rwlock functions have been implemented to use a more
2136 scalable algorithm primarily through not using a critical section anymore to
2139 Security related changes:
2141 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2142 have been created with makecontext could fail to terminate due to a
2143 missing .cantunwind annotation. This has been observed to lead to a hang
2144 (denial of service) in some Go applications compiled with gccgo. Reported
2145 by Andreas Schwab. (CVE-2016-6323)
2147 * The DNS stub resolver functions would crash due to a NULL pointer
2148 dereference when processing a query with a valid DNS question type which
2149 was used internally in the implementation. The stub resolver now uses a
2150 question type which is outside the range of valid question type values.
2153 The following bugs are resolved with this release:
2155 [4099] stdio: Overly agressive caching by stream i/o functions.
2156 [7065] build: Support building glibc with -fstack-protector or -fstack-
2158 [9842] localedata: en_CA: incorrect date format
2159 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2160 before it started waiting
2161 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2162 [15765] nptl: sem_open is wrongly a cancellation point
2163 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2164 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2166 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2167 library linked with pthread
2168 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2169 "FIXME: Ingo" issue)
2170 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2171 [17252] libc: getrandom and getentropy syscall
2172 [17730] malloc: thread-local storage is sometimes improperly free()'d
2173 after being __libc_memalign()'d
2174 [18241] stdio: failed fseek on memstream does not set errno and can fail
2176 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2178 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2179 PTHREAD_PRIO_INHERIT mutex on ARM
2180 [18784] network: res_query and related function crash for special record
2181 type queries (CVE-2015-5180)
2182 [19380] math: strtod does not raise "inexact"
2183 [19387] string: Integer overflow in memchr
2184 [19390] string: Integer overflow in strncat
2185 [19398] build: linknamespace tests fail with massively parallel build
2186 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2188 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2189 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2190 [19514] libc: [PATCH] Fix spelling errors in spelling
2191 "implement"/"implementation" in several places
2192 [19582] network: Deprecate RES_USE_INET6
2193 [19673] manual: clog10 docs appear to be erroneous
2194 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2195 causes a segmentation fault
2196 [19826] libc: invalid pointer returned from __tls_get_addr with static
2198 [20016] network: resolv: Remove hooks support from the API
2199 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2201 [20033] math: [x86_64] vectorized math function don't call the __finite
2203 [20116] nptl: use after free in pthread_create
2204 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2205 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2207 [20311] nptl: please install proc_service.h
2208 [20366] libc: Compilation errors in installed headers in strict-compliance
2210 [20370] malloc: malloc: Arena free list management is still racy
2211 (incorrect fix in bug 19243)
2212 [20386] libc: assert (X = 0) does not result in GCC warning
2213 [20432] malloc: malloc: Minimize interface required for interposition
2214 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2215 in _Unwind_Backtrace (CVE-2016-6323)
2216 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2217 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2219 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2220 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2221 [20477] network: resolv: incorrect double-checked locking related to
2223 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2225 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2227 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2228 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2229 cause transition penalty
2230 [20517] math: sparcv9 missing fdiml compat symbol
2231 [20524] manual: strverscmp is inconsistent
2232 [20525] libc: <sys/quota.h> should be based on kernel headers
2233 [20539] math: GCC 7 -static -lm fails to link at -O3
2234 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2236 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2238 [20591] network: Remove obsolete DNSSEC support
2239 [20592] network: DNS resource record type classification macros in
2240 <arpa/nameser.h> are incorrect
2241 [20593] network: Update DNS RR type definitions
2242 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2243 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2245 [20629] network: libresolv: Remove support for bitstring labels
2247 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2248 assertion: "maxidx >= 2"
2249 [20660] math: [arm] Use VSQRT
2250 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2251 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2252 [20689] libc: Test for FMA should also check for AVX.
2253 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2254 [20715] math: iszero macro breaks existing code
2255 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2256 [20728] libc: powerpc: Missing TOC stub in clone
2257 [20729] build: glibc-2.24 fails to build for i486 with -Os
2258 [20750] build: Build fails with default PIE enabled gcc-6.x
2259 [20768] math: [alpha] sqrt fegetenv namespace
2260 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2262 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2263 __FLT_EVAL_METHOD__ is 2
2264 [20790] network: rpcgen buffer overrun in get_prog_declaration
2265 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2266 [20829] libc: crypt snprintf namespace
2267 [20847] libc: tst-vfork3 failure
2268 [20855] math: Default bits/mathdef.h has inappropriate float_t
2269 [20859] math: [sh4] FP_ILOGB0 invalid
2270 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2271 U+20AC), not same as GBK
2272 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2273 [20916] math: pow handling of sNaN arguments
2274 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2275 [20919] math: Bad pow (qNaN, 0) result with -lieee
2276 [20940] math: hypot sNaN handling
2277 [20947] math: fmax, fmin sNaN handling
2278 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2279 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2281 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2282 [20973] nptl: robust mutexes: Lost wake-ups
2283 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2284 [20978] nis: strlen on null pointer in nss_nisplus
2285 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2287 [21014] string: i686 memchr overflows internal pointer check
2288 [21019] libc: [mips] n32 lseek incorrect on overflow
2289 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2290 [21026] libc: [MIPS] readahead syscall is broken on n64
2291 [21028] math: Fallback fesetexceptflag should always succeed
2292 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2293 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2295 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2296 [21061] librt: [microblaze] librt lost clock_* exports
2297 [21073] libc: tunables: insecure environment variables passed to
2298 subprocesses with AT_SECURE
2299 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2303 * The minimum Linux kernel version that this version of the GNU C Library
2304 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2305 kernel version 2.6.32 or later suffices (on architectures that already
2306 required kernel versions more recent than 3.2, those requirements remain
2307 unchanged). Linux 3.2 or later kernel headers are required on all
2310 * The pap_AN locale has been deleted. This has been deprecated for a long
2311 time. It has been replaced by pap_AW & pap_CW, both of which have long
2312 been included in previous releases.
2314 * The readdir_r and readdir64_r functions have been deprecated. It is
2315 recommended to use readdir and readdir64 instead.
2317 * The type āunion waitā has been removed. It was deprecated in the early
2318 1990s and never part of POSIX. Application code should use the int type
2319 instead of āunion waitā.
2321 * A new NSS action is added to facilitate large distributed system
2322 administration. The action, MERGE, allows remote user stores like LDAP
2323 to be merged into local user stores like /etc/groups in order to provide
2324 easy to use, updated, and managed sets of merged credentials. The new
2325 action can be used by configuring it in /etc/nsswitch.conf:
2326 group: files [SUCCESS=merge] nis
2327 Implemented by Stephen Gallagher (Red Hat).
2329 * The deprecated __malloc_initialize_hook variable has been removed from the
2332 * The long unused localedef --old-style option has been removed. It hasn't
2333 done anything in over 16 years. Scripts using this option can safely
2336 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2337 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2338 return the next representable value in the direction of positive infinity
2339 and the nextdown functions return the next representable value in the
2340 direction of negative infinity. These are currently enabled as GNU
2343 Security related changes:
2345 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2346 could result in a stack overflow when getnetbyname was called with an
2347 overly long name. (CVE-2016-3075)
2349 * Previously, getaddrinfo copied large amounts of address data to the stack,
2350 even after the fix for CVE-2013-4458 has been applied, potentially
2351 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2352 instead. Reported by Michael Petlan. (CVE-2016-3706)
2354 * The glob function suffered from a stack-based buffer overflow when it was
2355 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2356 Reported by Alexander Cherepanov. (CVE-2016-1234)
2358 * The Sun RPC UDP client could exhaust all available stack space when
2359 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2360 alloca plugin for GCC. (CVE-2016-4429)
2362 * The IPv6 name server management code in libresolv could result in a memory
2363 leak for each thread which is created, performs a failing naming lookup,
2364 and exits. Over time, this could result in a denial of service due to
2365 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2367 The following bugs are resolved with this release:
2369 [1170] localedata: ne_NP: update Nepali locale definition file
2370 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2372 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2373 [6796] math: fdim() does not set errno on overflow
2374 [10354] libc: posix_spawn should use vfork() in more cases than presently
2375 [11213] localedata: localedata: add copyright disclaimer to locale files
2376 [12143] localedata: chr_US: new Cherokee locale
2377 [12450] localedata: sgs_LT: new locale
2378 [12676] localedata: ln_CD: new locale
2379 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2381 [13304] math: fma, fmaf, fmal produce wrong results
2382 [14259] build: --localedir arg to configure is ignored
2383 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2384 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2385 [14934] localedata: es_CL: wrong first weekday chilean locale
2386 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2388 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2390 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2391 [15368] nptl: raise() is not async-signal-safe
2392 [15479] math: ceil, floor, round and trunc raise inexact exception
2393 [15578] localedata: kk_KZ: various updates
2394 [16003] localedata: pap_AN: punt old locale
2395 [16137] localedata: iw_IL: punt old locale
2396 [16190] localedata: eo: new esperanto locale
2397 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2398 [16742] malloc: race condition: pthread_atfork() called before first
2399 malloc() results in unexpected locking behaviour/deadlocks
2400 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2402 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2403 [17565] localedata: pt_PT: wrong (work-)week start
2404 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2405 [17950] build: Build fails with -msse
2406 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2407 [18433] libc: posix_spawn does not return correctly upon failure to
2409 [18453] localedata: charmaps/IBM875: incorrect codes
2410 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2412 [18896] localedata: he_IL: improvements for currency
2413 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2414 Romanian locale data
2415 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2417 [19056] libc: Deprecate readdir_r
2418 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2420 [19198] localedata: nl_NL: small improvements for Dutch locales
2421 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2422 nameservers (CVE-2016-5417)
2423 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2425 [19400] locale: Language missing in "iso-639.def", trivial fix in
2427 [19431] malloc: Deadlock between fflush, getdelim, and fork
2428 [19505] libc: Incorrect file descriptor validity checks in
2429 posix_spawn_file_actions_add{open,close,dup2}
2430 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2431 when using RTLD_NEXT
2432 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2433 `intl/{gettextP,loadinfo}.h'
2434 [19534] libc: execle, execlp may use malloc
2435 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2436 [19573] network: res_nclose and __res_maybe_init disagree about name
2437 server initialization, breaking Hesiod
2438 [19575] localedata: Status of GB18030 tables
2439 [19581] localedata: sr_* date_fmt string contains additional newline
2440 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2442 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2443 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2444 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2445 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2447 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2449 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2451 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2452 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2453 [19633] locale: strfmon_l applies global locale to number formatting
2454 [19642] network: Memory leak in getnameinfo
2455 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2456 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2458 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2459 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2461 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2462 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2464 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2466 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2468 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2469 pointers and lengths in error-case.
2470 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2471 report errors on UTF-16 surrogates values.
2472 [19755] nscd: nscd assertion failure in gc
2473 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2474 [19759] libc: mempcpy shouldn't be inlined
2475 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2476 [19765] libc: s390 needs an optimized mempcpy
2477 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2478 NAME_MAX limit assumption (CVE-2016-1234)
2479 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2480 [19787] network: Missing and incorrect truncation checks in getnameinfo
2481 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2483 [19791] network: Assertion failure in res_query.c with un-connectable name
2485 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2486 [19822] math: libm.so install clobbers old version
2487 [19825] network: resolv: send_vc can return uninitialized data in second
2488 response to getaddrinfo
2489 [19830] network: nss_dns: should check RDATA length against buffer length
2490 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2491 confronted with A/AAAA records of invalid size
2492 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2493 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2494 [19853] stdio: Printing IBM long double in decimal with high precision is
2496 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2497 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2498 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2500 [19865] network: Assertion failure or memory leak in
2501 _nss_dns_getcanonname_r
2502 [19868] network: nss_dns: netent code does not skip over non-PTR records
2503 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2505 [19881] string: Improve x86-64 memset
2506 [19907] string: Incorrect memcpy tests
2507 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2509 [19925] libc: termios.h XCASE namespace
2510 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2511 [19929] libc: limits.h NL_NMAX namespace
2512 [19931] stdio: Memory leak in vfprintf
2513 [19957] libc: clone(CLONE_VM) access invalid parent memory
2514 [19963] localedata: en_IL: New locale
2515 [19989] stdio: stdio.h cuserid namespace
2516 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2518 [19996] locale: langinfo.h nl_langinfo_l namespace
2519 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2520 [20010] network: getaddrinfo: Stack overflow in hostent translation
2522 [20012] stdio: libio: fmemopen append mode failure
2523 [20014] stdio: stdio.h namespace for pre-threads POSIX
2524 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2525 [20023] libc: fcntl.h timespec namespace
2526 [20024] math: [x86_64] vectorized sincos trashes the stack
2527 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2528 [20041] time: sys/time.h timespec namespace
2529 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2530 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2531 [20051] libc: ttyslot in wrong header under wrong conditions
2532 [20054] libc: gethostname not declared for XPG4
2533 [20055] libc: termios.h missing tcgetsid for XPG4
2534 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2536 [20073] libc: sys/stat.h fchmod namespace
2537 [20074] libc: stdlib.h rand_r namespace
2538 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2539 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2541 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2542 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2544 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2545 [20119] libc: Wrong mask for processors level type from CPUID
2546 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2547 AS not supporting AVX512
2548 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2550 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2551 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2553 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2554 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2555 [20178] libc: posix_spawn{p} should not call exit
2556 [20191] stdio: libio: vtables hardening
2557 [20195] string: FMA4 detection requires CPUID execution with register
2559 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2560 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2562 [20212] math: acos (sNaN) returns sNaN
2563 [20213] math: asin (sNaN) returns sNaN
2564 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2565 [20218] math: [i386] asinhl (sNaN) returns sNaN
2566 [20219] math: [i386] atanhl (sNaN) returns sNaN
2567 [20222] stdio: fopencookie: Mangle function pointers
2568 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2569 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2570 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2572 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2573 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2574 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2575 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2576 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2577 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2578 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2579 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2580 [20240] math: modf (sNaN) returns sNaN
2581 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2582 [20250] math: frexp (sNaN) returns sNaN
2583 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2584 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2586 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2587 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2588 subscript is below array bounds [-Werror=array-bounds]
2589 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2590 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2592 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2593 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2595 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2596 "invalid" exceptions
2597 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2598 [20316] localedata: id_ID: Februari instead of Pebruari
2599 [20327] string: POWER8 strcasecmp returns incorrect result
2600 [20347] math: Failure: Test: j0_downward (0xap+0)
2601 [20348] libc: FAIL: misc/tst-preadvwritev64
2602 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2603 [20350] libc: There is no test for p{read,write}64
2604 [20357] math: Incorrect cos result for 1.5174239687223976
2605 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2609 * Unicode 8.0.0 Support: Character encoding, character type info, and
2610 transliteration tables are all updated to Unicode 8.0.0, using new
2611 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2612 These updates cause user visible changes, such as the fixes for bugs
2613 89, 16061, and 18568.
2615 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2616 kernel-internal CPU set size. This means that requests that change the
2617 CPU affinity which failed before (for example, an all-ones CPU mask) will
2618 now succeed. Applications that need to determine the effective CPU
2619 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2620 setting it because the kernel can adjust it (and the previous size check
2621 would not detect this in the majority of cases).
2623 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2624 the following new symbols are used: fts64_children, fts64_close,
2625 fts64_open, fts64_read and fts64_set.
2627 * getaddrinfo now detects certain invalid responses on an internal netlink
2628 socket. If such responses are received, an affected process will
2629 terminate with an error message of "Unexpected error <number> on netlink
2630 descriptor <number>" or "Unexpected netlink response of size <number> on
2631 descriptor <number>". The most likely cause for these errors is a
2632 multi-threaded application which erroneously closes and reuses the netlink
2633 file descriptor while it is used by getaddrinfo.
2635 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2636 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2637 unnecessary serialization of memory allocation requests across threads.
2638 The defect is now corrected. Users should see a substantial increase in
2639 the concurent throughput of allocation requests for applications which
2640 trigger this bug. Affected applications typically create and
2641 destroy threads frequently. (Bug 19048 was reported and analyzed by
2644 * There is now a --disable-timezone-tools configure option for disabling the
2645 building and installing of the timezone related utilities (zic, zdump, and
2646 tzselect). This is useful for people who build the timezone data and code
2647 independent of the GNU C Library.
2649 * The obsolete header <regexp.h> has been removed. Programs that require
2650 this header must be updated to use <regex.h> instead.
2652 * The obsolete functions bdflush, create_module, get_kernel_syms,
2653 query_module and uselib are no longer available to newly linked binaries;
2654 the header <sys/kdaemon.h> has been removed. These functions and header
2655 were specific to systems using the Linux kernel and could not usefully be
2656 used with the GNU C Library on systems with version 2.6 or later of the
2659 * Optimized string, wcsmbs and memory functions for IBM z13.
2660 Implemented by Stefan Liebler.
2662 * Newly linked programs that define a variable called signgam will no longer
2663 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2664 require signgam to be set by those functions must ensure that they use the
2665 variable provided by the GNU C Library and declared in <math.h>, without
2666 defining their own copy.
2668 * The minimum GCC version that can be used to build this version of the GNU
2669 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2670 still be used to compile programs using the GNU C Library.
2672 Security related changes:
2674 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2675 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2677 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2678 the pointer guard feature. It is always enabled. Previously,
2679 LD_POINTER_GUARD could be used to disable security hardening in binaries
2680 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2683 * An integer overflow in hcreate and hcreate_r could lead to an
2684 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2686 * The catopen function no longer has unbounded stack usage. Reported by
2687 Max. (CVE-2015-8779)
2689 * The nan, nanf and nanl functions no longer have unbounded stack usage
2690 depending on the length of the string passed as an argument to the
2691 functions. Reported by Joseph Myers. (CVE-2014-9761)
2693 * A stack-based buffer overflow was found in libresolv when invoked from
2694 libnss_dns, allowing specially crafted DNS responses to seize control
2695 of execution flow in the DNS client. The buffer overflow occurs in
2696 the functions send_dg (send datagram) and send_vc (send TCP) for the
2697 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2698 family. The use of AF_UNSPEC triggers the low-level resolver code to
2699 send out two parallel queries for A and AAAA. A mismanagement of the
2700 buffers used for those queries could result in the response of a query
2701 writing beyond the alloca allocated buffer created by
2702 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2703 the overflow. Thanks to the Google Security Team and Red Hat for
2704 reporting the security impact of this issue, and Robert Holiday of
2705 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2707 The following bugs are resolved with this release:
2709 [89] localedata: Locales nb_NO and nn_NO should transliterate ƦĆøĆ„
2710 [887] math: Math library function "logb" and "nextafter" inconsistent
2711 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2712 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2713 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2714 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2716 [4404] localedata: German translation of "Alarm clock" is misleading
2717 [6799] math: nextafter() and nexttoward() doen't set errno on
2718 overflow/underflow errors
2719 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2721 [10432] nis: _nss_nis_setnetgrent assertion failure
2722 [11460] libc: fts has no LFS support
2723 [12926] network: getaddrinfo()/make_request() may spin forever
2724 [13065] nptl: Race condition in pthread barriers
2725 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2726 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2728 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2729 [14912] libc: Rename non-installed bits/*.h headers
2730 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2731 [15367] math: Let gcc use __builtin_isinf
2732 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2733 [15421] math: lgamma wrongly sets signgam for ISO C
2734 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2735 FE_INVALID with argument out of range
2736 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2738 [15786] dynamic-link: ifunc resolver functions can smash function
2740 [15918] math: Unnecessary check for equality in hypotf()
2741 [16061] localedata: Review / update transliteration data
2742 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2744 [16141] time: strptime %z offset restriction
2745 [16171] math: drem should be alias of remainder
2746 [16296] math: fegetround is pure?
2747 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2748 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2750 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2751 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2753 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2754 "Exception "Inexact" set" on ppc32
2755 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2756 [16517] math: Missing underflow exception from tanf/tan/tanl
2757 [16519] math: Missing underflow exception from sinhf
2758 [16520] math: Missing underflow exception from tanhf
2759 [16521] math: Missing underflow exception from exp2
2760 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2762 [16734] stdio: fopen calls mmap to allocate its buffer
2763 [16961] math: nan function incorrect handling of bad sequences
2764 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2765 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2766 [16985] locale: localedef: confusing error message when opening output
2768 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2769 [17197] locale: Redundant shift character in iconv conversion output at
2771 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2772 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2773 [17250] dynamic-link: static linking breaks nss loading
2774 (getaddrinfo/getpwnam/etc...)
2775 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2777 [17441] math: isnan() should use __builtin_isnan() in GCC
2778 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2779 (related to lock elision)
2780 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2781 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2782 [17887] time: strptime should be able to parse "+01:00" style timezones
2783 [17905] libc: catopen() Multiple unbounded stack allocations
2785 [18084] libc: backtrace (..., 0) dumps core on x86
2786 [18086] libc: nice() sets errno to 0 on success
2787 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2788 is too large (CVE-2015-8778)
2789 [18251] dynamic-link: SONAME missing when audit modules provides path
2790 [18265] libc: add attributes for wchar string and memory functions
2791 [18370] math: csqrt missing underflows
2792 [18421] libc: [hppa] read-only segment has dynamic relocations
2793 [18472] libc: Obsolete syscall wrappers should be compat symbols
2794 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2795 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2796 [18525] localedata: Remove locale timezone information
2797 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2798 [18568] localedata: Update locale data to Unicode 8.0
2799 [18589] locale: sort-test.sh fails at random
2800 [18595] math: ctan, ctanh missing underflows
2801 [18604] libc: assert macro-expands its argument
2802 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2803 contains a vector instruction exception.
2804 [18611] math: j1, jn missing errno setting on underflow
2805 [18618] localedata: sync Chechen locale definitions with other *_RU
2807 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2808 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2809 [18665] network: In send_dg, the recvfrom function is NOT always using the
2810 buffer size of a newly created buffer (CVE-2015-7547)
2811 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2813 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2815 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2816 [18699] math: tilegx cproj() for various complex infinities does not yield
2818 [18724] libc: Harden put*ent functions against data injection
2819 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2820 [18755] build: build errors with -DNDEBUG
2821 [18757] stdio: fmemopen fails to set errno on failure
2822 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2824 [18781] libc: openat64 lacks O_LARGEFILE
2825 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2826 error: canāt find a register in class āR1_REGSā while reloading āasmā
2827 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2828 [18790] math: [ldbl-128ibm] tanhl inaccurate
2829 [18795] libc: stpncpy fortification misses buffer lengths that are
2830 statically too large
2831 [18796] build: build fails for --disable-mathvec
2832 [18803] math: hypot missing underflows
2833 [18820] stdio: fmemopen may leak memory on failure
2834 [18823] math: csqrt spurious underflows
2835 [18824] math: fma spurious underflows
2836 [18825] math: pow missing underflows
2837 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2838 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2839 [18870] build: sem_open.c fails to compile with missing symbol
2841 [18872] stdio: Fix memory leak in printf_positional
2842 [18873] libc: posix_fallocate overflow check ineffective
2843 [18875] math: Excess precision leads incorrect libm
2844 [18877] libc: arm: mmap offset regression
2845 [18887] libc: memory corruption when using getmntent on blank lines
2846 [18918] localedata: hu_HU: change time to HH:MM:SS format
2847 [18921] libc: Regression: extraneous stat() and fstat() performed by
2849 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2850 binaries (CVE-2015-8777)
2851 [18951] math: tgamma missing underflows
2852 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2854 [18953] localedata: lt_LT: change currency symbol to the euro
2855 [18956] math: powf inaccuracy
2856 [18961] math: [i386] exp missing underflows
2857 [18966] math: [i386] exp10 missing underflows
2858 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2859 [18969] build: multiple string test failures due to missing locale
2861 [18970] libc: Reference of pthread_setcancelstate in libc.a
2862 [18977] math: float / long double Bessel functions not in XSI POSIX
2863 [18980] math: i386 libm functions return with excess range and precision
2864 [18981] math: i386 scalb*, ldexp return with excess range and precision
2865 [18982] stdio: va_list and vprintf
2866 [18985] time: Passing out of range data to strftime() causes a segfault
2868 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2869 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2870 [19012] locale: iconv_open leaks memory on error path
2871 [19016] math: clog, clog10 inaccuracy
2872 [19018] nptl: Mangle function pointers in tls_dtor_list
2873 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2874 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2875 [19048] malloc: malloc: arena free list can become cyclic, increasing
2877 [19049] math: [powerpc] erfc incorrect zero sign
2878 [19050] math: [powerpc] log* incorrect zero sign
2879 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2880 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2881 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2882 [19074] network: Data race in _res_hconf_reorder_addrs
2883 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2884 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2885 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2887 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2889 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2890 [19086] manual: posix_fallocate64 documented argument order is wrong.
2891 [19088] math: lround, llround missing exceptions close to overflow
2893 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2894 [19095] math: dbl-64 lrint incorrect for 64-bit long
2895 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2896 [19124] dynamic-link: ld.so failed to build with older assmebler
2897 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2898 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2899 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2900 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2901 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2902 pthread_setaffinity_np
2903 [19156] math: [ldbl-128] j0l spurious underflows
2904 [19164] nptl: tst-getcpu fails with many possible CPUs
2905 [19168] math: math/test-ildoubl and math/test-ldouble failure
2906 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2907 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2909 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2910 (FE_NOMASK_ENV) do not clear SSE exceptions
2911 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2912 _int_new_arena/reused_arena
2913 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2914 [19201] math: dbl-64 remainder incorrect sign of zero result
2915 [19205] math: bits/math-finite.h conditions do not match math.h and
2917 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2918 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2919 for C99-based standards
2920 [19212] libc: features.h not -Wundef clean
2921 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2923 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2924 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2925 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2927 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2928 "inexact" exceptions
2929 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2931 [19242] libc: strtol incorrect in Turkish locales
2932 [19243] malloc: reused_arena can pick an arena on the free list, leading
2933 to an assertion failure and reference count corruption
2934 [19253] time: tzset() ineffective when temporary TZ did not include DST
2936 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2937 [19270] math: [hppa] Shared libm missing __isnanl
2938 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2939 MAP_HUGETLB and MAP_STACK defines
2940 [19313] nptl: Wrong __cpu_mask for x32
2941 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2942 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2943 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2944 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2945 [19363] time: x32: times() return value wrongly truncates/sign extends
2947 [19367] dynamic-link: Improve branch prediction on Silvermont
2948 [19369] network: Default domain name not reset by res_ninit when "search"
2949 / "domain" entry is removed from resolv.conf
2950 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2952 [19385] localedata: bg_BG: time separator should be colon, not comma
2953 [19408] libc: linux personality syscall wrapper may erroneously return an
2954 error on 32-bit architectures
2955 [19415] libc: dladdr returns wrong names on hppa
2956 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2957 IBM905, IBM907, and IBM909
2958 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2959 [19443] build: build failures with -DDEBUG
2960 [19451] build: Make check fails on test-double-vlen2
2961 [19462] libc: Glibc failed to build with -Os
2962 [19465] math: Wrong code with -Os
2963 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2965 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2967 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2968 [19486] math: S390: Math tests fail with "Exception Inexact set".
2969 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2970 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2972 [19590] math: Fail to build shared objects that use libmvec.so functions.
2976 * The following bugs are resolved with this release:
2978 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2979 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2980 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2981 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2982 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2983 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2984 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2985 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2986 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2987 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2988 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2989 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2990 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2991 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2992 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2993 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2994 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2995 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2996 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2997 18657, 18676, 18694, 18696, 18887.
2999 * Cache information can be queried via sysconf() function on s390 e.g. with
3000 _SC_LEVEL1_ICACHE_SIZE as argument.
3002 * A buffer overflow in gethostbyname_r and related functions performing DNS
3003 requests has been fixed. If the NSS functions were called with a
3004 misaligned buffer, the buffer length change due to pointer alignment was
3005 not taken into account. This could result in application crashes or,
3006 potentially arbitrary code execution, using crafted, but syntactically
3007 valid DNS responses. (CVE-2015-1781)
3009 * The time zone file parser has been made more robust against crafted time
3010 zone files, avoiding heap buffer overflows related to the processing of
3011 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3012 large time zone data files. Overly long time zone specifiers in the TZ
3013 variable no longer result in stack overflows and crashes.
3015 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3016 for LD and GD on x86 and x86-64, has been implemented. You will need
3017 binutils-2.24 or later to enable this optimization.
3019 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3020 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3021 Hat). These updates cause user visible changes, such as the fix for bug
3024 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3025 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3026 condition in some applications.
3028 * Added vector math library named libmvec with the following vectorized x86_64
3029 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3031 The library can be disabled with --disable-mathvec. Use of the functions is
3032 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3033 Shared library libmvec.so is linked in as needed when using -lm (no need to
3034 specify -lmvec explicitly for not static builds).
3035 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3037 * A new fmemopen implementation has been added with the goal of POSIX
3038 compliance. The new implementation fixes the following long-standing
3039 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3040 old implementation is still present for use be by existing binaries.
3042 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3043 releases. It has been fixed to match 2.19 and older, but binaries built
3044 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3046 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3047 Contributed by Roland McGrath (Google).
3049 * The header <regexp.h> is deprecated, and will be removed in a future
3050 release. Use of this header will trigger a deprecation warning.
3051 Application developers should update their code to use <regex.h> instead.
3053 This header was formerly part of SUS, but was deprecated in 1994 and
3054 removed from the standard in 2001. Also, the glibc implementation
3055 leaks memory. See BZ#18681 for more details.
3059 * The following bugs are resolved with this release:
3061 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3062 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3063 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3064 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3065 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3066 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3067 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3068 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3069 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3070 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3073 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3074 too little memory for the to-be-scanned arguments and overflow the
3075 allocated buffer. The implementation now correctly computes the required
3076 buffer size when using malloc, and switches to malloc from alloca as
3079 * A new semaphore algorithm has been implemented in generic C code for all
3080 machines. Previous custom assembly implementations of semaphore were
3081 difficult to reason about or ensure that they were safe. The new version
3082 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3083 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3084 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3086 * Port to Altera Nios II has been contributed by Mentor Graphics.
3088 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3089 implementations for powerpc64/powerpc64le.
3090 Implemented by Adhemerval Zanella (IBM).
3092 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3093 and powerpc64le. This may improve lock scaling of existing programs on
3094 HTM capable systems. The lock elision code is only enabled with
3095 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3096 powerpc will issue a transaction abort on every syscall to avoid side
3097 effects being visible outside transactions.
3099 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3100 AArch64. Contributed by ARM Ltd.
3102 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3104 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3105 under certain input conditions resulting in the execution of a shell for
3106 command substitution when the application did not request it. The
3107 implementation now checks WRDE_NOCMD immediately before executing the
3108 shell and returns the error WRDE_CMDSUB as expected.
3110 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3111 processing format strings with a large number of format specifiers.
3113 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3114 infinite loop if the DNS response contained a PTR record of an unexpected
3117 * The minimum GCC version that can be used to build this version of the GNU
3118 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3119 still be used to compile programs using the GNU C Library.
3121 * The GNU C Library is now built with -Werror by default. This can be
3122 disabled by configuring with --disable-werror.
3124 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3126 * The obsolete sigvec function has been removed. This was the original
3127 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3128 programs have been using instead for about 25 years. Of course, ABI
3129 compatibility for old binaries using sigvec remains intact.
3131 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3132 with newer versions of bison.
3134 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3135 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3136 registers overlay two consecutive single-precision registers. MIPS32R2
3137 introduced a new FPU mode (FR=1) where double-precision registers extend the
3138 corresponding single-precision registers which is incompatible with the
3139 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3140 require the use of FR=1 making a transition necessary. New o32 ABI
3141 extensions enable users to migrate over time from the original o32 ABI
3142 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3143 tracks the ABI of any loaded object and verifies that new objects are
3144 compatible. Mode transitions will also be requested as required and
3145 unsupportable objects will be rejected. The ABI checks include both soft and
3146 hard float ABIs for o32, n32 and n64.
3148 GCC 5 with GNU binutils 2.25 onwards:
3149 It is strongly recommended that all o32 system libraries are built using the
3150 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3151 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3152 compiler using --with-fp-32=xx to set this by default.
3156 * The following bugs are resolved with this release:
3158 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3159 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3160 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3161 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3162 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3163 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3164 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3165 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3166 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3167 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3168 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3169 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3170 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3171 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3172 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3174 * Reverted change of ABI data structures for s390 and s390x:
3175 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3176 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3177 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3178 are preserved pointing straight to the same implementation as the old ones.
3179 Given that, new callers will simply provide a too-big buffer to these
3180 functions. Any applications/libraries out there that embed jmp_buf or
3181 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3182 against 2.19 headers will have to rebuilt again. This is necessary in any
3183 case to revert the breakage in their ABI caused by the glibc change.
3185 * Support for file description locks is added to systems running the
3186 Linux kernel. The standard file locking interfaces are extended to
3187 operate on file descriptions, not file descriptors, via the use of
3188 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3189 are associated with an open file instead of a process.
3191 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3193 * The minimum Linux kernel version that this version of the GNU C Library
3194 can be used with is 2.6.32.
3196 * Running the testsuite no longer terminates as soon as a test fails.
3197 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3198 with PASS or FAIL lines for individual tests. A summary of the results is
3199 printed, including a list of failing lists, and "make check" exits with
3200 error status if there were any unexpected failures. "make check
3201 stop-on-test-failure=y" may be used to keep the old behavior.
3203 * The am33 port, which had not worked for several years, has been removed
3206 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3207 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3208 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3209 conflicted with POSIX (support for which was removed in 2.19), the
3210 interfaces those macros enabled remain available when compiling with
3211 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3212 test macros defined.
3214 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3216 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3217 This may improve lock scaling of existing programs on TX capable systems.
3218 The lock elision code is only built with --enable-lock-elision=yes and
3219 then requires a GCC version supporting the TX builtins. With lock elision
3220 default mutexes are elided via __builtin_tbegin, if the cpu supports
3221 transactions. By default lock elision is not enabled and the elision code
3224 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3225 copy the path argument. This allowed programs to cause posix_spawn to
3226 deference a dangling pointer, or use an unexpected pathname argument if
3227 the string was modified after the posix_spawn_file_actions_addopen
3230 * All supported architectures now use the main glibc sysdeps directory
3231 instead of some being in a separate "ports" directory (which was
3232 distributed separately before glibc 2.17).
3234 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3235 On configurations that support it (all Linux configurations), it's now
3236 used regardless of the --enable-add-ons switch to configure. It is no
3237 longer possible to build such configurations without pthreads support.
3239 * Locale names, including those obtained from environment variables (LANG
3240 and the LC_* variables), are more tightly checked for proper syntax.
3241 setlocale will now fail (with EINVAL) for locale names that are overly
3242 long, contain slashes without starting with a slash, or contain ".." path
3243 components. (CVE-2014-0475) Previously, some valid locale names were
3244 silently replaced with the "C" locale when running in AT_SECURE mode
3245 (e.g., in a SUID program). This is no longer necessary because of the
3248 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3249 with application code using Intel MPX instructions. (With all previous
3250 versions, the MPX register state could be clobbered when making calls
3251 into or out of a shared library.) Note that while the new dynamic
3252 linker is compatible with all known x86 hardware whether or not it
3253 supports Intel MPX, some x86 instruction-set emulators might fail to
3254 handle the new instruction encodings. This is known to affect Valgrind
3255 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3256 release), and might affect other tools that do instruction emulation.
3258 * Support for loadable gconv transliteration modules has been removed.
3259 The support for transliteration modules has been non-functional for
3260 over a decade, and the removal is prompted by security defects. The
3261 normal gconv conversion modules are still supported. Transliteration
3262 with //TRANSLIT is still possible, and the //IGNORE specifier
3263 continues to be supported. (CVE-2014-5119)
3265 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3266 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3267 resulting a denial-of-service security vulnerability in applications which
3268 use functions related to iconv. (CVE-2014-6040)
3272 * The following bugs are resolved with this release:
3274 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3275 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3276 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3277 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3278 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3279 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3280 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3281 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3282 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3283 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3284 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3285 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3286 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3287 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3288 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3289 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3290 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3291 16431, 16453, 16474, 16506, 16510, 16529
3293 * Slovenian translations for glibc messages have been contributed by the
3294 Translation Project's Slovenian team of translators.
3296 * The public headers no longer use __unused nor __block. This change is to
3297 support compiling programs that are derived from BSD sources and use
3298 __unused internally, and to support compiling with Clang's -fblock
3299 extension which uses __block.
3301 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3302 large collation sequences to optimize multiple passes. This cache
3303 computation may overflow for large collation sequences and may cause a
3304 stack or buffer overflow. This is now fixed to use a slower algorithm
3305 which does not use a cache if there is an integer overflow.
3307 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3308 rules for large collation sequences to optimize multiple passes and falls
3309 back to alloca if malloc fails, resulting in a possible stack overflow.
3310 The implementation now falls back to an uncached collation sequence lookup
3313 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3314 initialized for static applications resulting in the security feature
3315 being disabled. The pointer guard is now correctly initialized to a
3316 random value for static applications. Existing static applications need
3317 to be recompiled to take advantage of the fix (bug 15754).
3319 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3320 to the d_name member of struct dirent, or omit the terminating NUL
3321 character. (Bugzilla #14699).
3323 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3324 aligned_alloc functions could allocate too few bytes or corrupt the
3325 heap when passed very large allocation size values (Bugzilla #15855,
3328 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3329 for AF_INET6 has been fixed (Bugzilla #16072).
3331 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3332 pap_CW, quz_PE, the_NP.
3334 * Substantially revised locales: gd_GB, ht_HT
3336 * The LC_ADDRESS field was updated to support country_car for almost all
3339 * ISO 1427 definitions were updated.
3341 * ISO 3166 definitions were updated.
3343 * The localedef utility now supports --big-endian and --little-endian
3344 command-line options to generate locales for a different system from that
3345 for which the C library was built.
3347 * Binary locale files now only depend on the endianness of the system for
3348 which they are generated and not on other properties of that system. As a
3349 consequence, binary files generated with new localedef may be incompatible
3350 with old versions of the GNU C Library, and binary files generated with
3351 old localedef may be incompatible with this version of the GNU C Library,
3352 in the following circumstances:
3354 + Locale files may be incompatible on m68k systems.
3356 + Locale archive files (but not separate files for individual locales) may
3357 be incompatible on systems where plain "char" is signed.
3359 * The configure option --disable-versioning has been removed. Builds with
3360 --disable-versioning had not worked for several years.
3362 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3363 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3365 * SystemTap probes for malloc have been introduced.
3367 * SystemTap probes for slow multiple precision fallback paths of
3368 transcendental functions have been introduced.
3370 * Support for powerpc64le has been added.
3372 * The soft-float powerpc port now supports e500 processors.
3374 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3376 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3377 set of header declarations that are enabled by default, even when other
3378 feature test macros or compiler options such as -std=c99 would otherwise
3379 disable some of those declarations.
3381 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3382 conflict with POSIX. The libbsd-compat library (which was a dummy library
3383 that did nothing) has also been removed.
3385 * Preliminary documentation about Multi-Thread, Async-Signal and
3386 Async-Cancel Safety has been added.
3388 * Change of ABI data structures for s390 and s390x:
3389 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3390 allow for future hardware extensions. All library functions that accept or
3391 return these structures were versioned in order to provide backwards
3392 compatibility with existing code. However, not all cases can be handled
3393 with interface versioning. If an application embeds either structure into
3394 another structure and that structure is passed to another compilation unit
3395 which expects the newer larger-sized object then any access to the new
3396 fields will result in undefined behaviour. Similarly any access to fields
3397 that were moved by the enlarging of the structures will cause undefined
3398 behaviour. To fix the undefined behaviour all objects that are part of the
3399 final in-memory image must agree on the size of structures, and this may
3400 require recompilation.
3404 * The following bugs are resolved with this release:
3406 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3407 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3408 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3409 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3410 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3411 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3412 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3413 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3414 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3415 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3416 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3417 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3418 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3421 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3422 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3423 Distributions can re-enable building and using pt_chown via the new configure
3424 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3425 considerable security risks and should only be used if the distribution
3426 understands and accepts the risks.
3428 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3431 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3432 fixed (Bugzilla #15330).
3434 * Add support for calling C++11 thread_local object destructors on thread
3435 and program exit. This needs compiler support for offloading C++11
3436 destructor calls to glibc.
3438 * Improved worst case performance of libm functions with double inputs and
3441 * Support for priority inherited mutexes in pthread condition variables on
3442 non-x86 architectures.
3444 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3446 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3448 * Optimized string functions for ARM. Implemented by Will Newton and
3451 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3453 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3456 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3457 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3459 * Added a benchmark framework to track performance of functions in glibc.
3461 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3462 It is based on draft TS 18661 and currently enabled as a GNU extension.
3464 * On Linux, the clock function now uses the clock_gettime system call
3465 for improved precision, rather than old times system call.
3467 * Added support for version-3 tz format files. This is needed when using
3468 the tz database release 2013e or later, and affects a few unusual cases --
3469 currently only TZ='America/Godthab' for time stamps after 2037.
3471 * Added new API functions pthread_getattr_default_np and
3472 pthread_setattr_default_np to get and set the default pthread
3473 attributes of a process.
3475 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3476 This may improve lock scaling of existing programs on TSX capable systems.
3477 When the --enable-lock-elision=yes parameter is specified at configure
3478 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3481 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3482 availability). Implemented by Ryan S. Arnold.
3484 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3488 * The following bugs are resolved with this release:
3490 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3491 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3492 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3493 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3494 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3495 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3496 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3497 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3498 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3499 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3500 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3501 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3502 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3503 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3504 14879, 14889, 14893, 14898, 14914.
3506 * Optimization of memcpy for MIPS.
3508 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3509 EMFILE has been fixed (Bugzilla #14889).
3511 * The add-on ports collection is now distributed in the "ports" subdirectory
3512 of the main GNU C Library distribution, rather than separately.
3514 * Port to ARM AArch64 contributed by Linaro.
3516 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3517 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3519 Implemented by Andreas Krebbel.
3521 * The new function secure_getenv allows secure access to the environment,
3522 returning NULL if running in a SUID/SGID process. This function replaces
3523 the internal function __secure_getenv.
3525 * SystemTap static probes have been added into the dynamic linker.
3526 Implemented by Gary Benson.
3528 * Optimizations of string functions strstr, strcasestr and memmem.
3529 Implemented by Maxim Kuvyrkov.
3531 * The minimum Linux kernel version that this version of the GNU C Library
3532 can be used with is 2.6.16.
3534 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3535 powerpc POWER7. Implemented by Will Schmidt.
3537 * New configure option --disable-nscd builds the C library such that it
3538 never attempts to contact the Name Service Caching Daemon (nscd).
3539 New configure option --disable-build-nscd avoids building nscd itself;
3540 this is the default if --disable-nscd is used.
3542 * Improved support for cross-compilation, including cross-testing and
3543 bootstrap builds without a previously built glibc.
3545 * Several testsuite tests are now able to test multiple IFUNC variants of an
3546 interface, rather than just testing the one that would be chooen by
3549 * New configure options --with-bugurl and --with-pkgversion, for
3550 distributors to use to embed their bug-reporting and package version
3551 information in --help and --version output.
3553 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3554 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3555 allows creation of chroots without the procfs mounted on /proc.
3557 * The `crypt' function now fails if passed salt bytes that violate the
3558 specification for those values. On Linux, the `crypt' function will
3559 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3560 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3561 when the mode is enabled.
3563 * The `clock_*' suite of functions (declared in <time.h>) is now available
3564 directly in the main C library. Previously it was necessary to link with
3565 -lrt to use these functions. This change has the effect that a
3566 single-threaded program that uses a function such as `clock_gettime' (and
3567 is not linked with -lrt) will no longer implicitly load the pthreads
3568 library at runtime and so will not suffer the overheads associated with
3569 multi-thread support in other code such as the C++ runtime library.
3571 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3576 * The following bugs are resolved with this release:
3578 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3579 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3580 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3581 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3582 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3583 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3584 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3585 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3586 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3587 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3588 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3589 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3590 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3591 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3592 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3593 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3594 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3595 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3596 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3597 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3598 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3599 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3602 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3603 configuring glibc with:
3604 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3605 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3606 Implemented by H.J. Lu.
3610 + define static_assert
3612 + do not declare gets
3614 + declare at_quick_exit and quick_exit also for ISO C11
3616 + aligned_alloc. NB: The code is deliberately allows the size parameter
3617 to not be a multiple of the alignment. This is a moronic requirement
3618 in the standard but it is only a requirement on the caller, not the
3621 + timespec_get added
3623 + uchar.h support added
3625 + CMPLX, CMPLXF, CMPLXL added
3627 Implemented by Ulrich Drepper.
3629 * Support for the IA-64 has been moved to ports.
3631 * Remove support for anything but ELF binary format
3633 * Checking versions of poll, ppoll added.
3634 Implemented by Ulrich Drepper.
3636 * More generic and 64-bit performance optimizations to math functions.
3637 Implemented by Ulrich Drepper.
3639 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3640 headers and functions available at compile time as they were before
3641 version 2.14. This option will be removed at some time in the future
3642 after the TI-RPC library becomes fully sufficient for the needs of
3643 existing applications.
3645 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3646 Note that glibc is not expected to work with any Linux kernel version
3649 * New header <sys/auxv.h> and function getauxval allowing easy access to
3650 the AT_* key-value pairs passed from the Linux kernel. The header also
3651 defines the HWCAP_* bits associated with the AT_HWCAP key.
3653 * New locales: mag_IN
3655 * New configure option --enable-systemtap builds SystemTap static probes
3656 into libc for setjmp and longjmp and into libpthread for various operations.
3657 So far the setjmp/longjmp probes and some of the libpthread probes are
3658 provided only for i*86 and x86_64.
3659 Implemented by Roland McGrath and Rayson Ho.
3661 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3663 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3666 * More optimized functions for SPARC. Implemented by David S. Miller.
3668 * Improved support for cross-compilation, especially bootstrap builds
3669 without a previously built glibc.
3671 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3672 Chris Metcalf from Tilera.
3674 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3675 now supported for ARM processors.
3677 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3678 as the name of the dynamic linker, to distinguish it from the
3679 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3681 * Support for CRIS has been removed from ports.
3683 * A new class of installed header has been documented for low-level
3684 platform-specific functionality. PowerPC added the first instance with a
3685 function to provide time base register access. Contributed by Tulio
3686 Magno Quites Machado Filho.
3688 * ix86 configurations now install header files that are consistent with
3689 what x86-64 configurations install. These same header files can be used
3690 for -m32, -m64, or -mx32 builds.
3691 Contributed by H.J. Lu.
3693 * Math library bug fixes. A thorough audit of all open math library bugs was
3694 conducted by Joseph Myers. Significant progress was made on many math
3695 library bugs resulting in more accurate exceptions and function results.
3696 Many thanks to all those that contributed including Andreas Jaeger for his
3697 patch review and work on the x87 trigonometric instruction issues.
3699 * Timezone data is no longer installed. Timezone-related binaries and scripts
3700 will continue to be installed. Users should obtain their timezone data from
3701 their distribution provider or from the tzdata package at
3702 <ftp://munnari.oz.au/pub/>.
3706 * The following bugs are resolved with this release:
3708 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3709 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3710 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3711 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3712 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3713 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3714 13484, 13506, 13515, 13523, 13524, 13538, 13540
3716 * New program pldd to list loaded object of a process
3717 Implemented by Ulrich Drepper.
3719 * Add nss_db support back to glibc. No more dependency on Berkeley db
3720 and support for initgroups lookups.
3721 Implemented by Ulrich Drepper.
3723 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3724 Contributed by HJ Lu.
3726 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3727 Contributed by HJ Lu.
3729 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3730 on x86-32 and x86-64.
3731 Contributed by Liubov Dmitrieva.
3733 * Optimized strchr and strrchr for SSE on x86-32.
3734 Contributed by Liubov Dmitrieva.
3736 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3737 for x86-64 and x86-32.
3738 Contributed by Liubov Dmitrieva.
3740 * New interfaces: scandirat, scandirat64
3741 Implemented by Ulrich Drepper.
3743 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3744 Implemented by Ulrich Drepper.
3746 * nscd now also caches the netgroup database.
3747 Implemented by Ulrich Drepper.
3749 * Integrate libm with gcc's -ffinite-math-only option.
3750 Implemented by Ulrich Drepper.
3752 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3753 to math functions. Implemented by Ulrich Drepper.
3755 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3756 Implemented by Ulrich Drepper.
3758 * New Linux interfaces: process_vm_readv, process_vm_writev
3760 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3761 Implemented by Ulrich Drepper.
3763 * Optimized nearbyint and strcasecmp for PPC.
3764 Implemented by Adhemerval Zanella.
3766 * New locales: bho_IN, unm_US, es_CU, ta_LK
3770 * The following bugs are resolved with this release:
3772 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3773 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3774 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3775 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3776 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3777 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3778 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3779 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3780 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3781 12795, 12811, 12813, 12814, 12841
3783 * The RPC implementation in libc is obsoleted. Old programs keep working
3784 but new programs cannot be linked with the routines in libc anymore.
3785 Programs in need of RPC functionality must be linked against TI-RPC.
3786 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3788 Visible changes of this change include (obviously) the inability to link
3789 programs using RPC functions without referencing the TI-RPC library and the
3790 removal of the RPC headers from the glibc headers.
3791 Implemented by Ulrich Drepper.
3793 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3794 syncfs, setns, sendmmsg
3796 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3797 yue_HK, lij_IT, mhr_RU
3799 * New encodings: CP770, CP771, CP772, CP773, CP774
3801 * New program sotruss to trace calls through PLTs
3802 Implemented by Ulrich Drepper.
3804 * The malloc hook implementation is marked deprecated and will be removed
3805 from the default implementation in the next version. The design never
3806 worked ever since the introduction of threads. Even programs which do
3807 not create threads themselves can use multiple threads created internally.
3811 * The following bugs are resolved with this release:
3813 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3814 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3815 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3816 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3819 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3821 * POWER7 optimizations: memset, memcmp, strncmp
3823 * New optimized string functions for x86-64: strnlen (SSE2),
3824 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3825 Implemented by Ulrich Drepper.
3829 * The following bugs are resolved with this release:
3831 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3832 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3833 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3834 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3835 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3836 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3837 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3838 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3840 * New interfaces: pthread_getname_np, pthread_setname_np
3842 * New Linux interface: recvmmsg
3844 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3846 * The dynamic linker now recognizes supported ABI versions from the
3847 EI_ABIVERSION field in the ELF header.
3848 Implemented by Ulrich Drepper.
3850 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3851 will not be used to fill in password fields in the passwd.byname replies.
3852 Instead it is used to synthesize the shadow.byname table, should it be
3853 missing. This is a useful mode in some installations involving Solaris.
3854 Implemented by Ulrich Drepper.
3856 * New locales: kok_IN, sq_MK, cv_RU
3860 * The following bugs are resolved with this release:
3862 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3863 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3864 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3865 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3866 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3867 10789, 10817, 10823, 10840, 10847
3869 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3871 Implemented by Ulrich Drepper.
3873 * Checking version of longjmp added that fails if an uninitialized stack
3874 frame would be created. Implemented by Ulrich Drepper.
3876 * STT_GNU_IFUNC is now supported in static executables.
3877 Implemented by H.J. Lu.
3879 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3881 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3882 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3883 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3884 Contributed by H.J. Lu.
3886 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3887 Implemented by Ulrich Drepper.
3889 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3891 Contributed by H.J. Lu.
3893 * Support for fma instruction in AVX on x86-64.
3894 Implemented by H.J. Lu and Ulrich Drepper.
3896 * AVX support in x86-64 auditing support in ld.so.
3897 Implemented by H.J. Lu.
3899 * STB_GNU_UNIQUE support added.
3900 Implemented by Ulrich Drepper.
3902 * Implement second fallback mode for optimized DNS lookup for even more
3903 broken environments. If two requests from the same port are not
3904 handled correctly close the socket and open a new one before sending
3905 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3906 can be used to select this mode right away, instead of rediscovering the
3907 necessity is every process again.
3908 Implemented by Ulrich Drepper.
3910 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3911 Implemented by Adam Tkac.
3913 * Optimized iconv conversions for S390x.
3914 Implemented by Andreas Krebbel.
3916 * Using condvars with PI mutexes is now more efficient due to kernel
3917 support for requeueing to PI futexes. NPTL support added for x86-64.
3918 Implemented by Ulrich Drepper.
3920 * New locales: ps_AF, my_MM
3924 * The following bugs are resolved with this release:
3926 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3927 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3928 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3929 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3930 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3932 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3933 Implemented by Ulrich Drepper.
3935 * New Linux interfaces: accept4, fallocate, fallocate64.
3936 Implemented by Ulrich Drepper.
3938 * Correct declarations of string function when used in C++ code. This
3939 could lead to compile errors for invalid C++ code.
3941 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3944 * New POSIX 2008 interface: psiginfo
3945 Implemented by Ulrich Drepper.
3947 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3948 Implemented by Ulrich Drepper.
3950 * Support for selecting between multiple function definitions at runtime
3951 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3953 * The libcrypt library can now use the hash function implementations in
3954 NSS. Implemented by Ulrich Drepper.
3956 * The malloc implementation can be compiled to be less memory efficient
3957 but higher performing in multi-threaded programs.
3958 Implemented by Ulrich Drepper.
3960 * New locales: nan_TW@latin, ks_IN
3962 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3963 Implemented by Ulrich Drepper.
3965 * Extended printf hook support. It is possible to use user-defined types
3966 and extend existing format specifiers.
3967 Implemented by Ulrich Drepper.
3969 * Handling for group shadow files has been added.
3970 Implemented by Ulrich Drepper.
3972 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3973 servers (the case, e.g., for some people using the built-in DNS
3974 server in ADSL modems/routers). There is a once-per-process timeout
3975 in case of a broken server. To avoid it, users can run nscd or put
3976 'options single-request' in /etc/resolv.conf.
3977 Implemented by Ulrich Drepper.
3981 * The following bugs are resolved with this release:
3983 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3984 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3985 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3986 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3987 6968, 6974, 6980, 6995, 7008, 7009, 7029
3989 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3990 up at the same time. Implemented by Ulrich Drepper.
3992 * TLS descriptors for LD and GD on x86 and x86-64.
3993 Implemented by Alexandre Oliva.
3995 * getaddrinfo now handles DCCP and UDPlite.
3996 Implemented by Ulrich Drepper.
3998 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3999 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4000 Implemented by Ulrich Drepper.
4002 * New implementation of memmem, strstr, and strcasestr which is O(n).
4003 Implemented by Eric Blake.
4005 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4007 * Implement "e" option for popen to open file descriptor with the
4008 close-on-exec flag set. Implemented by Ulrich Drepper.
4010 * Implement "b" mode for fmemopen. In this mode writes writes don't
4011 implicitly add a NUL byte and seeks from the end of the buffer really
4012 use the buffer end, not the string length as the basis.
4013 Implemented by Ulrich Drepper.
4015 * Many functions, exported and internal, now atomically set the close-on-exec
4016 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4018 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4020 Implemented by Pravin Satpute.
4022 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4026 * The following bugs are resolved with this release:
4028 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4029 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4030 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4031 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4032 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4033 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4034 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4036 * New locales: bo_CN, bo_IN, shs_CA.
4038 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4040 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4041 Implemented by Pravin Satpute.
4043 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4045 * nscd caches now all timeouts for DNS entries
4046 Implemented by Ulrich Drepper.
4048 * nscd is more efficient and wakes up less often.
4049 Implemented by Ulrich Drepper.
4051 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4052 vdprintf, and obstack_vprintf.
4053 Implemented by Jakub Jelinek.
4055 * Faster memset for x86-64.
4056 Implemented by Harsha Jagasia and H.J. Lu.
4058 * Faster memcpy on x86.
4059 Implemented by Ulrich Drepper.
4061 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4062 Implemented by Ulrich Drepper.
4064 * Faster sqrt and sqrtf implemention for some PPC variants.
4065 Implemented by Steven Munroe.
4069 * The following bugs are resolved with this release:
4071 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4072 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4073 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4074 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4075 5071, 5103, 5104, 5112, 5113, 5184, 5186
4077 * More checking functions: fread, fread_unlocked, open*, mq_open.
4078 Implemented by Jakub Jelinek and Ulrich Drepper.
4080 * Extend fortification to C++. Implemented by Jakub Jelinek.
4082 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4083 by not recognizing 'a' as a modifier when those specs are requested.
4084 Implemented by Jakub Jelinek.
4086 * PPC optimizations to math and string functions.
4087 Implemented by Steven Munroe.
4089 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4090 options to be passed. Implemented by Ulrich Drepper.
4092 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4094 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4095 Implemented by Ulrich Drepper.
4097 * Handle private futexes in the NPTL implementation.
4098 Implemented by Jakub Jelinek and Ulrich Drepper.
4100 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4101 Implemented by Roland McGrath and Ulrich Drepper.
4103 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4105 * SHA-256 and SHA-512 based password encryption.
4106 Implemented by Ulrich Drepper.
4108 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4109 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4112 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4113 Implemented by Ulrich Drepper.
4117 * The following bugs are resolved with this release:
4119 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4120 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4121 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4122 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4123 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4124 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4125 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4128 * New Linux interfaces: epoll_pwait, sched_getcpu.
4130 * New generic interfaces: strerror_l.
4132 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4136 * The following bugs are resolved with this release:
4138 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4139 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4140 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4141 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4142 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4143 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4144 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4145 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4146 3225, 3251, 3252, 3253, 3273
4148 * For Linux, the sorting of addresses returned by getaddrinfo now also
4149 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4150 Implemented by Ulrich Drepper.
4152 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4153 Implemented by Ulrich Drepper.
4155 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4157 * New iconv module for MIK. Contributed by Alexander Shopov.
4159 * For sites with broken group and/or passwd database, the auto-propagate
4160 option of nscd can prevent creating ID lookup entries from the results
4161 of a name lookup and vice versa. This usually is no problem but some
4162 site might have problems with the default behavior.
4163 Implemented by Ulrich Drepper.
4165 * Iterating over entire database in NIS can be slow. With the
4166 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4167 to trade time for memory. The entire database will be read at once.
4168 Implemented by Ulrich Drepper.
4170 * The interfaces introduced in RFC 3542 have been implemented by
4173 * Support for the new ELF hash table format was added by Ulrich Drepper.
4175 * Support for priority inheritance mutexes added by Jakub Jelinek and
4178 * Support for priority protected mutexes added by Jakub Jelinek.
4180 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4181 or_IN, csb_PL, fy_NL, sr_ME.
4185 * More overflow detection functions.
4187 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4188 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4190 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4191 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4192 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4193 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4194 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4195 by Masahide Washizawa.
4197 * It is now possible to install audit libraries for the dynamic linker using
4198 LD_AUDIT. Implemented by Ulrich Drepper.
4200 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4201 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4202 For a libc and libpthread that works well on Linux 2.4 kernels, we
4203 recommend using the stable 2.3 branch.
4205 * The new function open_wmemstream acts like open_memstream,
4206 but uses a wchar_t wide character buffer.
4208 * The new function ppoll is an improved version of poll, similar to pselect.
4210 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4211 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4212 renameat, unlinkat, linkat, symlinkat, readlinkat.
4214 * New Linux kernel system calls: unshare,
4215 inotify_init, inotify_add_watch, inotify_rm_watch.
4217 * The euidaccess function is now also known by the alias eaccess,
4218 for compatibility with some other systems.
4220 * Timezone data updated to 2006b version.
4224 * The following bugs are resolved with this release:
4226 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4227 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4228 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4229 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4230 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4231 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4233 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4235 * As of this release, GCC 4 can be used to compile the C Library.
4237 * Timezone data updated to 2005m version.
4241 * The following bugs are resolved with this release:
4243 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4244 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4245 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4246 777, 787, 821, 822, 823, 825
4248 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4252 * Support for RFC 3678. Real implementations exist only for Linux so far.
4253 Implemented by Ulrich Drepper.
4255 * nscd can now cache entries persistently. Expiring entries are reloaded.
4256 For speedups the cache can be shared in memory with client processes.
4257 Implemented by Ulrich Drepper.
4259 * nscd can now perform SELinux checks.
4260 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4262 * getaddrinfo queries are now cached. Canonical name lookup is performed
4264 Implemented by Ulrich Drepper.
4266 * The nothrow function attribute is used when headers are used by gcc when
4267 compiling C code. This can avoid significant amounts of exception
4270 * The malloc functions perform more error checking and are stricter when
4271 it comes to reacting on errors. The default action is to terminate
4272 the process after showing an error message. Implemented by Ulrich Drepper.
4274 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4275 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4277 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4278 namespaces using the new function dlmopen(). This feature is of course,
4279 like most other dynamic loading functionality, not available in statically
4280 linked applications. Implemented by Ulrich Drepper.
4282 * Low-overhead boundary checking variants of string and some stdio functions
4283 were added. These are to be used in conjunction with a gcc patch by
4284 Jakub Jelinek which adds calls to these functions if possible.
4285 Implemented by Jakub Jelinek and Ulrich Drepper.
4287 * Old code for several operating systems and machine architectures that
4288 have not been in working condition in a long time have been removed from
4289 the main source tree maintained by the GNU C Library's maintainers.
4290 These files are now reside in the separate `ports' source module
4291 that is usable as an add-on when building the library.
4295 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4296 interrogate the dynamic linker, compatible with the Solaris interface.
4298 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4299 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4301 * getifaddrs now uses the netlink interface on Linux to get its information.
4302 Implemented by Thorsten Kukuk.
4304 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4305 Implemented by Ulrich Drepper.
4307 * support for non-executable stacks on x86 has been added. Changes mostly
4310 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4313 * getaddrinfo now performs destination address selection according to
4318 * Thread-safe interfaces for many functions that access locale data
4319 were added in version 2.3, but these features were omitted from NEWS.
4320 Many functions have variants with an `_l' suffix that take a `locale_t'
4321 object as a parameter rather than consulting the current locale.
4322 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4323 create and maintain `locale_t' objects. Additionally, the new function
4324 `uselocale' sets "the current locale" (as used by functions not so
4325 parameterized) set for an individual thread. These features were added
4326 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4328 * The functions getresuid, getresgid, setresuid, and setresgid, which
4329 have long been available on Linux, are now declared in <unistd.h>
4330 and are now also available on the Hurd.
4332 * ELF thread-local storage support (TLS) now works on x86-64.
4334 * The new dynamic string token $LIB is expanded in shared library names.
4335 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4337 * Aldy Hernandez contributed complete software floating point support for
4338 PowerPC machines with no FPU.
4340 * fexecve is implemented on Linux.
4342 * The `btowc' function should work at least twice as fast due to
4343 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4345 * With approriate thread add-ons cancelable functions are now implemented
4346 in libc.so as well. No need to call the function in libpthread. This
4347 change allowed to finally disable the incorrect and expensive handling
4348 of weak definition in ld.so.
4350 * Yet more PLT entries in libc.so have been removed. We finally arrived
4351 at the bare minimum. Startup times improved appropriately.
4353 * Support for the new Linux/x86 system call interface was added. The
4354 AT_SYSINFO auxiliary vector entry is recognized and handled.
4358 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4361 * iconv (the program and the interface) now accepts empty names (excluding
4362 options like //TRANSLIT) to mean "use charset of current locale".
4364 * localedef can now transliterate characters in strings which are not in
4365 the provided charmap. The information from the input locale is used.
4367 * Prelinking support was added for ELF targets. This requires additional
4368 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4370 * Read-only stdio streams now use mmap to speed up operation by eliminating
4371 copying and buffer underflows. To use add 'm' to the mode string of
4372 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4374 * The malloc functions were completely rewritten by Wolfram Gloger based
4375 on Doug Lea's malloc-2.7.0.c.
4377 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4378 implementation of regex.
4380 * Bruno Haible upgraded the iconv and locale implementation to support
4383 * Contents of the LC_* and LANG environment variables in the CEN style are
4384 not recognized anymore. It never was used. Change by Ulrich Drepper.
4386 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4387 thread-local storage (TLS) ABI on some platforms.
4388 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4390 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4391 EUC-JISX0213, and TSCII.
4393 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4394 BSD-compatible interface for getting all network interface addresses.
4395 Implementation for IPv4 by Roland McGrath.
4397 * Loading of locale data is faster due to the introduction of a locale
4398 archive. Implemented by Roland McGrath and Ulrich Drepper.
4400 * Startup times are significantly reduced by not using exported functions
4401 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4404 * Steven Munroe contributed a port to PowerPC64/Linux.
4408 * The Hurd now uses the GNU libio implementation of stdio rather than the
4409 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4411 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4412 with the same behavior as the Linux system call of the same name.
4416 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4417 128-bit long double format.
4419 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4420 IBM1161, and IBM1162 charsets.
4422 * Andreas Jaeger contributed a port to x86-64/Linux.
4424 * Peter Bruin contributed a port to PowerPC/Hurd.
4426 * libc functions using I/O streams now can handle wide-oriented streams
4429 * optimizations in the dynamic linker. Binaries created by recent binutils
4430 versions start up quicker due to reduced time spent on relocations.
4432 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4436 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4437 asinh, atanh, j0 for the 128-bit long double format.
4439 * Bruno Haible updated all the code handling Unicode in some form to
4440 support Unicode 3.1.
4442 * Speed of regex for single-byte locales is back to previous levels.
4443 Patch by Isamu Hasegawa.
4445 * Alpha, SPARC, and IA-64 now also using floating stacks.
4447 * Startup time of internationalized applications greatly improved through
4448 iconv cache. Use iconvconfig to generate the cache file.
4449 Contributed by Ulrich Drepper.
4451 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4452 severe performance problems. Patch by David Mosberger.
4454 * The Hurd port got a lot more functionality like AIO, various stdio
4455 extensions, etc. Mainly done by Roland McGrath.
4457 * mtrace can now lookup symbols in shared libraries.
4461 * Intel's IA-64 math library is largely integrated. It provides fast and
4462 accurate implementatations for most basic and standard math functions
4463 in float, double, and long double format.
4465 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4466 and asin for the 96-bit long double format and asin, log, tan for the
4467 128-bit long double format.
4469 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4470 The basic double functions exist today. Contributed by Abraham Ziv
4471 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4472 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4474 * An asynchronous name lookup library was added. The interface is designed
4475 after POSIX AIO. The proposal was circulated beforehand to get comments.
4476 No negative ones came in. Implemented by Ulrich Drepper.
4478 * Port to S390/64bit contributed by Martin Schwidefsky
4479 <schwidefsky@de.ibm.com>.
4481 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4482 of functions for Linux/IA-64.
4484 * The RPC code is now thread safe. Threads can now use the same service
4485 of different services at the same time. Patch by Eric Norum
4486 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4488 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4489 family of functions for Linux/S390.
4491 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4492 of functions for Linux/x86.
4494 * Port to Linux/CRIS contributed by Axis Communications.
4498 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4499 we can now check for namespace violations and missing declarations. The
4500 result is that almost all headers are now Unix-compliant (as defined in
4501 the upcoming XPG6). The negative side is that some programs might need
4502 corrections, too, if they depend on the incorrect form of the headers in
4503 previous versions which defined too many symbols and included too many
4506 * regex now handles multibyte character sets correctly.
4507 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4509 * iconv (the program) does now conform to the upcoming XPG6 and handles
4510 charmaps. Instead of the charset names the path of charmaps can be
4511 provided and the conversion happens based on this data.
4512 Contributed by Ulrich Drepper.
4514 * The locale program now provides detailed information about the installed
4519 only lists the names of the supported locales
4523 provides details such as country, language, and codeset name.
4524 Contributed by Ulrich Drepper.
4528 * The gencat program now parses the input file according to the charset
4529 selected by the LC_CTYPE category. This is important for stateful
4530 character sets. To make generating catalogs easier there is a way
4531 to overwrite the charset selected by the locale: before the first
4532 message or $ quote line the catalog can contain a line like
4534 $ codeset=ISO-8859-2
4536 to select the charset (ISO-8859-2 in this case).
4538 Implemented by Shinya Hanataka and Ulrich Drepper.
4540 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4541 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4542 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4544 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4545 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4547 * The LANGUAGE environment variable is now ignored unless the locale is
4548 changed from the default "C" locale.
4550 * The usual bug fixes.
4554 * Greg McGary added runtime support for bounds checking using gcc's
4555 new -fbounded-pointers option. ix86 target is complete. PowerPC
4558 * Thorsten Kukuk added secure mode support to nscd.
4560 * The Berkeley db libraries have been removed.
4562 Related, the nss_db module is now in a separate package since it
4563 obviously requires a database library being available.
4565 * Wide character I/O streams implemented by Ulrich Drepper.
4567 * Functions from the extended socket API added by Ulrich Drepper.
4569 * Functions feenableexcept and fedisableexcept to control the
4570 behaviour of individual exceptions have been added by Andreas Jaeger.
4572 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4574 * The resolver code has been updated from bind 8.2.3-T5B which supports
4575 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4578 This change could in some situations effect backward compatibility. Since
4579 now `_res' is a thread-local instead of a global variable, modifying it
4580 in one thread does not have any effect in other threads.
4582 The resolver library was also extended to allow IPv6 as the transport
4583 protocol for the requests. This work was done by Stig Venaas.
4585 * Compatibility code for K&R C compilers has been removed from the
4586 header files. A ISO C compiler is needed to use the library
4587 (conforming to either C89 or C99 standard).
4589 * Complete rewrite of the localedef program to support multibyte character
4590 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4591 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4592 Implemented by Ulrich Drepper.
4594 Bruno Haible significantly improved the generation and use of the data
4595 structures for the wide character tables.
4597 * Plural handling in gettext implemented by Ulrich Drepper.
4599 * The utmp daemon has been removed.
4601 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4603 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4606 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4608 * POSIX barriers implemented by Kaz Kylheku.
4610 * POSIX spawn function family implemented by Ulrich Drepper.
4612 * POSIX spinlocks are now available.
4614 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4616 * the configure option --enable-kernel=X.Y.Z allows to strip out
4617 compatibility for kernel versions before X.Y.Z. This is currently only
4618 implemented for Linux.
4620 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4621 field sin6_scope_id. This means that all programs using IPv6 should be
4622 recompiled. Don't expect binary compatibility with previous glibc
4625 * various conversion modules for IBM character sets contributed by
4628 * IA-64 port by Jes Sorensen and HJ Lu.
4642 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4644 * New xdr functions are added; some rpc functions are now 64bit clean.
4646 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4648 * Fixed known incompatibilities with glibc 2.0.
4650 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4652 * Optimized a number of functions (especially the ELF dynamic loader).
4654 * Update timezone data files.
4656 * lots of charmaps corrections
4658 * some new locale definitions and charmaps
4663 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4664 conform to POSIX member type requirements. Symbol versions have been
4665 adjusted as needed within the library, and for direct use by applications,
4666 but there is potential for problems if third-party libraries use
4667 struct timeval as part of their interface. This does not present
4668 a problem for X and other "essential" system libraries.
4670 * An additional locale model to support C++ Standard Library locale
4671 model and probably more was implemented by Ulrich Drepper.
4673 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4676 * Miles Bader provided the `argp' function family to support hierachical
4677 command line argument parsing, layered on top of getopt.
4679 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4681 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4684 * scanf recognizes the %a and %A format for scanning floating point numbers.
4686 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4687 information and interfaces for the available integer types.
4689 * about 130 new math functions were added to implement the ISO C9x math
4692 * the new header <complex.h> contains definitions of the complex math
4693 functions from ISO C 9X.
4695 * the new header <tgmath.h> defines generic macros to use complex or
4696 real valued functions.
4698 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4700 * Andreas Jaeger provided a test suite for the math library.
4702 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4704 * Ulrich Drepper added character set conversion functions (iconv).
4706 * Optimized string functions have been added.
4708 * The localedata addon is now part of glibc.
4710 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4712 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4713 daemon for NSS (nscd).
4715 Missing a better place here are some numbers on improvements. Under
4716 Linux 2.1.125 un-tar-ing the kernel sources takes
4720 using local files 12.19s 6.88s 22.91s
4722 using NIS 13.92s 8.91s 26.34s
4724 using NIS & nscd 10.37s 7.34s 25.30s
4726 using NIS+ 27.57s 30.37s 640.46s
4728 using NIS+ & nscd 10.25s 7.83s 26.51s
4730 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4732 Keep in mind that non-namelookup related operations dominate above times.
4733 It was just a common complain that using NIS+ unpacking the kernel is
4736 [1] The old nscd implementation is not available anymore since it was
4737 distributed with glibc up to version 2.0.98 and thus is now replaced.
4739 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4741 * Mark Kettenis provided a Hesiod NSS module.
4743 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4744 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4746 * rcmd can now handle netgroups (Dick Streefland).
4748 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4751 * Support for the IPv6 protocol has been added to the socket API, as per the
4752 latest draft standards.
4754 * Support for Linux 2.2 has been added.
4756 * Interface changes relative to the latest 2.0.x release:
4757 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4758 addseverity NEW: Unix98
4759 alphasort64 NEW: LFS
4760 argp_err_exit_status NEW: argp, GNU ext
4761 argp_error NEW: argp, GNU ext
4762 argp_failure NEW: argp, GNU ext
4763 argp_help NEW: argp, GNU ext
4764 argp_parse NEW: argp, GNU ext
4765 argp_program_bug_address NEW: argp, GNU ext
4766 argp_program_version NEW: argp, GNU ext
4767 argp_program_version_hook NEW: argp, GNU ext
4768 argp_state_help NEW: argp, GNU ext
4769 argp_usage NEW: argp, GNU ext
4770 authdes_create NEW: Secure RPC
4771 authdes_getucred NEW: Secure RPC
4772 authdes_pk_create NEW: Secure RPC
4773 backtrace NEW: GNU ext.
4774 backtrace_symbols NEW: GNU ext.
4775 backtrace_symbols_fd NEW: GNU ext.
4777 cacosf NEW: ISO C 9x
4778 cacosh NEW: ISO C 9x
4779 cacoshf NEW: ISO C 9x
4780 cacoshl NEW: ISO C 9x
4781 cacosl NEW: ISO C 9x
4788 casinf NEW: ISO C 9x
4789 casinh NEW: ISO C 9x
4790 casinhf NEW: ISO C 9x
4791 casinhl NEW: ISO C 9x
4792 casinl NEW: ISO C 9x
4794 catanf NEW: ISO C 9x
4795 catanh NEW: ISO C 9x
4796 catanhf NEW: ISO C 9x
4797 catanhl NEW: ISO C 9x
4798 catanl NEW: ISO C 9x
4799 cbc_crypt NEW: Secure RPC
4803 ccoshf NEW: ISO C 9x
4804 ccoshl NEW: ISO C 9x
4810 cimagf NEW: ISO C 9x
4811 cimagl NEW: ISO C 9x
4812 clearerr_locked REMOVED
4813 clntunix_create NEW: sunrpc ext
4815 clog10 NEW: ISO C 9x
4816 clog10f NEW: ISO C 9x
4817 clog10l NEW: ISO C 9x
4827 cprojf NEW: ISO C 9x
4828 cprojl NEW: ISO C 9x
4830 crealf NEW: ISO C 9x
4831 creall NEW: ISO C 9x
4836 csinhf NEW: ISO C 9x
4837 csinhl NEW: ISO C 9x
4840 csqrtf NEW: ISO C 9x
4841 csqrtl NEW: ISO C 9x
4845 ctanhf NEW: ISO C 9x
4846 ctanhl NEW: ISO C 9x
4848 des_setparity NEW: Secure RPC
4849 ecb_crypt NEW: Secure RPC
4850 endutxent NEW: Unix98
4852 exp10f NEW: ISO C 9x
4853 exp10l NEW: ISO C 9x
4857 fattach NEW: STREAMS
4858 fdetach NEW: STREAMS
4862 feclearexcept NEW: ISO C 9x
4863 fegetenv NEW: ISO C 9x
4864 fegetexceptflag NEW: ISO C 9x
4865 fegetround NEW: ISO C 9x
4866 feholdexcept NEW: ISO C 9x
4868 feraiseexcept NEW: ISO C 9x
4869 ferror_locked REMOVED
4870 fesetenv NEW: ISO C 9x
4871 fesetexceptflag NEW: ISO C 9x
4872 fesetround NEW: ISO C 9x
4873 fetestexcept NEW: ISO C 9x
4874 feupdateenv NEW: ISO C 9x
4875 fflush_locked REMOVED
4879 fgets_unlocked NEW: GNU ext.
4880 fileno_locked REMOVED
4892 fputc_locked REMOVED
4893 fputs_unlocked NEW: GNU ext.
4894 fread_unlocked NEW: GNU ext.
4899 fstatvfs NEW: Unix98
4903 ftruncate64 NEW: LFS
4905 fwrite_unlocked NEW: GNU ext.
4906 gai_strerror NEW: IPv6
4910 getchar_locked REMOVED
4912 getdate_err NEW: Unix98
4913 getdate_r NEW: GNU ext.
4915 getnameinfo NEW: IPv6
4916 getnetname NEW: Secure RPC
4917 getpmsg NEW: STREAMS
4918 getpt NEW: Unix98 PTY
4919 getrlimit64 NEW: LFS
4920 getutxent NEW: Unix98
4921 getutxid NEW: Unix98
4922 getutxline NEW: Unix98
4923 glob64 NEW: GNU ext.
4924 globfree64 NEW: GNU ext.
4925 gnu_get_libc_release NEW: GNU ext.
4926 gnu_get_libc_version NEW: GNU ext.
4927 grantpt NEW: Unix98 PTY
4928 host2netname NEW: Secure RPC
4930 iconv_close NEW: iconv
4931 iconv_open NEW: iconv
4932 if_freenameindex NEW: IPv6
4933 if_indextoname NEW: IPv6
4934 if_nameindex NEW: IPv6
4935 if_nametoindex NEW: IPv6
4936 in6addr_any NEW: IPv6
4937 in6addr_loopback NEW: IPv6
4938 inet6_isipv4mapped NEW: IPv6
4939 isastream NEW: STREAMS
4940 iswblank NEW: GNU ext.
4941 key_decryptsession NEW: Secure RPC
4942 key_decryptsession_pk NEW: Secure RPC
4943 key_encryptsession NEW: Secure RPC
4944 key_encryptsession_pk NEW: Secure RPC
4945 key_gendes NEW: Secure RPC
4946 key_get_conv NEW: Secure RPC
4947 key_secretkey_is_set NEW: Secure RPC
4948 key_setnet NEW: Secure RPC
4949 key_setsecret NEW: Secure RPC
4950 llrint NEW: ISO C 9x
4951 llrintf NEW: ISO C 9x
4952 llrintl NEW: ISO C 9x
4953 llround NEW: ISO C 9x
4954 llroundf NEW: ISO C 9x
4955 llroundl NEW: ISO C 9x
4960 lrintf NEW: ISO C 9x
4961 lrintl NEW: ISO C 9x
4962 lround NEW: ISO C 9x
4963 lroundf NEW: ISO C 9x
4964 lroundl NEW: ISO C 9x
4966 makecontext NEW: Unix98
4967 mempcpy NEW: GNU ext.
4970 modify_ldt NEW: kernel
4974 nearbyint NEW: ISO C 9x
4975 nearbyintf NEW: ISO C 9x
4976 nearbyintl NEW: ISO C 9x
4977 netname2host NEW: Secure RPC
4978 netname2user NEW: Secure RPC
4979 nexttoward NEW: ISO C 9x
4980 nexttowardf NEW: ISO C 9x
4981 nexttowardl NEW: ISO C 9x
4985 passwd2des NEW: Secure RPC
4987 pow10f NEW: GNU ext.
4988 pow10l NEW: GNU ext.
4991 printf_size NEW: GNU ext.
4992 printf_size_info NEW: GNU ext.
4993 profil_counter REMOVED
4994 pthread_mutexattr_getkind_np REPLACED
4995 pthread_mutexattr_setkind_np REPLACED
4996 ptsname NEW: Unix98 PTY
4997 ptsname_r NEW: Unix98 PTY
4999 putchar_locked REMOVED
5000 putgrent NEW: GNU ext.
5002 putpmsg NEW: STREAMS
5003 pututxline NEW: Unix98
5007 readdir64_r NEW: LFS
5008 remquo NEW: ISO C 9x
5009 remquof NEW: ISO C 9x
5010 remquol NEW: ISO C 9x
5012 roundf NEW: ISO C 9x
5013 roundl NEW: ISO C 9x
5015 scalbln NEW: ISO C 9x
5016 scalblnf NEW: ISO C 9x
5017 scalblnl NEW: ISO C 9x
5019 sendfile NEW: kernel
5020 setcontext NEW: Unix98
5021 setrlimit64 NEW: LFS
5022 setutxent NEW: Unix98
5024 sigignore NEW: Unix98
5025 sigqueue NEW: POSIX.1b
5026 sigrelse NEW: Unix98
5027 sigset NEW: POSIX.1b
5028 sigtimedwait NEW: POSIX.1b
5029 sigwaitinfo NEW: POSIX.1b
5030 sincos NEW: GNU ext.
5031 sincosf NEW: GNU ext.
5032 sincosl NEW: GNU ext.
5036 strcasestr NEW: GNU ext.
5037 strtoimax NEW: ISO C 9x
5038 strtoumax NEW: ISO C 9x
5039 strverscmp NEW: GNU ext.
5040 svcauthdes_stats NEW: Secure RPC
5041 svcunix_create NEW: sunrpc etx
5042 svcunixfd_create NEW: sunrpc ext
5043 swapcontext NEW: Unix98
5044 tcgetsid NEW: Unix98 PTY
5045 tdestroy NEW: GNU ext.
5046 tgamma NEW: ISO C 9x
5047 tgammaf NEW: ISO C 9x
5048 tgammal NEW: ISO C 9x
5052 truncf NEW: ISO C 9x
5053 truncl NEW: ISO C 9x
5055 unlockpt NEW: Unix98 PTY
5056 updwtmpx NEW: Unix98
5057 user2netname NEW: Secure RPC
5058 utmpxname NEW: Unix98
5059 versionsort NEW: GNU ext.
5060 versionsort64 NEW: GNU ext.
5062 wcscasecmp NEW: GNU ext.
5063 wcsncasecmp NEW: GNU ext.
5064 wcsnlen NEW: GNU ext.
5065 wcstoimax NEW: ISO C 9x
5066 wcstoll NEW: ISO C 9x
5067 wcstoull NEW: ISO C 9x
5068 wcstoumax NEW: ISO C 9x
5070 wordexp NEW: POSIX.2
5071 wordfree NEW: POSIX.2
5072 write_profiling REMOVED
5073 xdecrypt NEW: Secure RPC
5074 xdr_authdes_cred NEW: Secure RPC
5075 xdr_authdes_verf NEW: Secure RPC
5076 xdr_cryptkeyarg NEW: Secure RPC
5077 xdr_cryptkeyarg2 NEW: Secure RPC
5078 xdr_cryptkeyres NEW: Secure RPC
5079 xdr_getcredres NEW: Secure RPC
5080 xdr_key_netstarg NEW: Secure RPC
5081 xdr_key_netstres NEW: Secure RPC
5082 xdr_keybuf NEW: Secure RPC
5083 xdr_keystatus NEW: Secure RPC
5084 xdr_netnamestr NEW: Secure RPC
5085 xdr_sizeof NEW: Secure RPC
5086 xdr_unixcred NEW: sunrpc ext
5087 xencrypt NEW: Secure RPC
5088 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5099 * inet_ntoa is thread-safe
5101 * updwtmp is moved from libutil to libc
5103 * rewrite of cbrt function
5105 * update of timezone data
5119 * add atoll function
5121 * fix complex problems in Berkeley DB code
5123 * fix math functions
5127 * fixed lots of header problems (especially Linux/GNU specific)
5129 * dynamic loader preserves all registers
5131 * Roland McGrath provided support for handling of auxiliary objects in
5132 the ELF dynamic loader.
5134 * support for parallel builds is improved
5138 * GNU extensions are no longer declared by default. To enable them you
5139 must define the macro `_GNU_SOURCE' in your program or compile with
5142 * The library has changed from using GNU ld symbol aliases to using weak
5143 symbols where available. The ELF object file format supports weak
5144 symbols; GNU ld also supports weak symbols in the a.out format. (There
5145 is also now support for other GNU ld extensions in ELF. Use the
5146 `--with-elf' option to configure to indicate you have ELF, and
5147 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5148 of many files which contained only symbol aliases, reducing the size of
5149 the source and the compiled library; many other files were renamed to
5150 less cryptic names previously occupied by the symbol alias files.
5151 There is a new header file <elf.h> for programs which operate on
5152 files in the ELF format.
5154 * Converted to Autoconf version 2, so `configure' has more options.
5155 Run `configure --help' to see the details.
5157 * The library can now be configured to build profiling, highly-optimized
5158 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5159 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5160 `configure' enable building these extra libraries. The shared library is
5161 built by default when using both ELF and GNU ld. When shared libraries
5162 are enabled, the new library `-ldl' is available for arbitrary run-time
5163 loading of shared objects; its interface is defined in <dlfcn.h>. The
5164 new header file <link.h> gives access to the internals of the run-time
5165 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5166 application of same name on other systems and it provides information
5167 about dynamically linked binaries.
5169 * The C library now provides the run-time support code for profiling
5170 executables compiled with `-pg'. Programs can control the profiling code
5171 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5172 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5173 the support for this file format was contributed by David Mosberger-Tang.
5175 * The math code has been replaced with a math library based on fdlibm from
5176 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5177 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5178 functions. The math functions now reside in a separate library, so
5179 programs using them will need to use `-lm' their linking commands.
5181 * John C. Bowman contributed optimized ix87 assembler inline functions.
5183 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5184 mechanism similar to that found in Solaris 2. This is now used for the
5185 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5186 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5187 file controls what services are used for each individual database. This
5188 works by loading shared libraries with names specified in `nsswitch.conf',
5189 so service modules can be changed or added at any time without even
5190 relinking any program. Currently there are the file, db, and NIS based
5191 NSS services available.
5193 * The new functions `strtoq' and `strtouq' parse integer values from
5194 strings, like `strtol' and `strtoul', but they return `long long int' and
5195 `unsigned long long int' values, respectively (64-bit quantities).
5197 * The new functions `strtof' and `strtold' parse floating-point values from
5198 strings, like `strtod', but they return `float' and `long double' values,
5199 respectively (on some machines `double' and `long double' are the same).
5201 * Ulrich Drepper has contributed new implementations of the floating-point
5202 printing and reading code used in the `printf' family of functions and
5203 `strtod', `strtof', and `strtold'. These new functions are perfectly
5204 accurate, and much faster than the old ones.
5206 * The implementation of the POSIX locale model was completely rewritten by
5207 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5208 to compile the POSIX locale definition.
5210 * The former dummy implementations of the strcoll and strxfrm function are
5211 now replaced by fully functional code contributed by Ulrich Drepper. The
5212 collation information comes from the POSIX locale definitions.
5214 * The new header <langinfo.h> defines an interface for accessing
5215 various locale-dependent data (using the locale chosen with `setlocale').
5217 * Ulrich Drepper has contributed a new suite of functions for operation on
5218 wide-character and multibyte-character strings, in <wchar.h>;
5219 and classification and case conversion of wide characters, in <wctype.h>.
5220 These new functions are conforming to the ISO C, Amendement 1 specification.
5222 * There is now a second implementation of the standard I/O library available.
5223 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5224 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5226 * You can now use positional parameter specifications in format strings
5227 for the `printf' and `scanf' families of functions. For example,
5228 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5229 ``Number 6, Mr Jones''. This is mainly useful when providing different
5230 format strings for different languages, whose grammars may dictate
5231 different orderings of the values being printed. To support this
5232 feature, the interface for `register_printf_handler' has changed; see
5233 the header file <printf.h> for details.
5235 * The `printf' and `scanf' families of functions now understand a new
5236 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5237 to group numbers as indicated by the locale; for `scanf' and friends, this
5238 says to accept as valid only a number with all the proper grouping
5239 separators in the right places. In the default "C" locale, numbers are
5240 not grouped; but locales for specific countries will define the usual
5241 conventions (i.e. separate thousands with `,' in the US locale).
5243 * The pgrp functions have been regularized, slightly incompatibly but much
5244 less confusingly. The core functions are now `getpgid' and `setpgid',
5245 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5246 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5247 provided for compatibility. There is no longer an incompatible `getpgrp'
5248 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5250 * The new header file <fts.h> and suite of functions simplify programs that
5251 operate on directory trees. This code comes from 4.4 BSD.
5253 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5254 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5255 NSS scheme used in glibc.
5257 * There is a new malloc debugging hook `__memalign_hook'.
5259 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5260 `unsigned int' in <sys/types.h>. These are for compatibility only and
5261 their use is discouraged.
5263 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5264 done differently, so that it works even without GNU ld.
5266 * New function `euidaccess' checks allowed access to a file like `access',
5267 but using the effective IDs instead of the real IDs.
5269 * The time zone data files have been updated for the latest and greatest
5270 local time conventions of the countries of the world.
5272 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5275 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5276 for formatting floating-point numbers. They are provided only for
5277 compatibility; new programs should use `sprintf' instead. There are
5278 also equivalent function for the `long double' floating-point type and
5279 all functions also exist in a reentrant form.
5281 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5282 functions for maintaining the login-record files (primarily of use to
5283 system programs such as `login'), and convenient functions for
5284 allocating and initializing a pseudo-terminal (pty) device.
5286 * Ulrich Drepper has contributed new support for System V style
5287 shared memory and IPC on systems that support it.
5289 * Ulrich Drepper has contributed several miscellaneous new functions found
5290 in System V: The `hsearch' family of functions provide an effective
5291 implementation of hash tables; `a64l' and `l64a' provide a very simple
5292 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5295 * Ulrich Drepper has contributed new reentrant counterparts for the
5296 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5298 * Ulrich Drepper has contributed new, highly-optimized versions of several
5299 string functions for the i486/Pentium family of processors.
5301 * Ulrich Drepper has updated the Linux-specific code, based largely
5302 on work done in Hongjiu Lu's version of GNU libc for Linux.
5303 The GNU library now supports Linux versions 2.0.10 and later,
5304 using the ELF object file format (i[3456]86-*-linux).
5306 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5308 * David Mosberger-Tang and Richard Henderson have ported the C library
5309 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5310 dynamic linking support for ELF/Alpha.
5312 * Richard Henderson contributed several Alpha optimized assembler function
5313 for arithmetic and string handling.
5315 * Ulrich Drepper has contributed a new set of message catalog functions to
5316 support multiple languages using the <libintl.h> interface, for use with
5317 his new package GNU gettext. Translation volunteers have contributed
5318 catalogs of the library's messages in Spanish, German, and Korean.
5320 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5321 program and the `catgets' function for reading the catalog files it
5322 creates. (The <libintl.h> interface is preferred; we include the
5323 <nl_types.h> interface using `catgets' only for source compatibility with
5324 programs already written to use it.)
5326 * New header file <values.h> gives SVID-compatible names for <limits.h>
5329 * Various new macros, declarations, and small header files for compatibility
5332 * New function `group_member' is a convenient way to check if a process has
5333 a given effective group ID.
5335 * When using GCC 2.7 and later, the socket functions are now declared in a
5336 special way so that passing an argument of type `struct sockaddr_in *',
5337 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5338 `struct sockaddr *' type, does not generate a type-clash warning.
5340 * New function `error' declared in header file <error.h> is a convenient
5341 function for printing error messages and optionally exiting; this is the
5342 canonical function used in GNU programs. The new functions `err', `warn',
5343 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5344 doing the same thing.
5346 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5347 POSIX.2 `glob' function to do ~ and {...} expansion.
5349 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5350 `clearenv' which is used in POSIX.9 is also available.
5352 * New function `getsid' returns session ID number on systems that support it.
5354 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5355 files <db.h> and <mpool.h> provide a rich set of functions for several
5356 types of simple databases stored in memory and in files, and <ndbm.h> is
5357 an old `ndbm'-compatible interface using the `db' functions. Link with
5358 `-ldb' to get these functions.
5360 * New macro `strdupa' copies a string like `strdup', but uses local stack
5361 space from `alloca' instead of dynamic heap space from `malloc'.
5363 * New function `strnlen' is like `strlen' but searches only a given maximum
5364 number of characters for the null terminator. `stpncpy', `strndup' and
5365 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5368 * New function `statfs' in header <sys/statfs.h>.
5370 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5371 provide convenient functions for operating on blocks of null-terminated
5374 * A new suite of functions in <utmp.h> handle all the details of reading
5375 and writing the utmp file.
5377 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5380 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5381 completely POSIX compliant and also implemented the extended functionality
5382 to handle alternate digit representation and alternate era date formats.
5384 * Ulrich Drepper provided an implementation of the `strptime' function
5385 defined in XPG4.2 which transforms a string into a `struct tm' value.
5387 * Paul Eggert provided the tzselect shell script as part of the timezone
5388 code. The shell script makes it easy to select the correct timezone
5391 * The implementation of the malloc family of functions is completely replaced
5392 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5393 The implementation uses the mmap function (if available) and it is
5394 optimized for the use in multi threaded programs.
5396 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5397 functions. This new functionality is usable by specifying a special
5398 salt string and it is compatible with implementation on *BSD systems.
5400 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5401 `getsubopt' to handle second level command line options, `bsd_signal'
5402 to access BSD style `signal' functionality, the obsolete `regexp' style
5405 * the `lchown' function is available on system which support this
5408 * The implementation of the shadow password handling function was contributed
5411 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5413 * POSIX.1g support was added. The <sys/select.h> header is available,
5414 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5415 implementation of `getaddrinfo'.
5419 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5421 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5422 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5424 * The new function `daemon' from 4.4 BSD is useful for server programs that
5425 want to put themselves in the background.
5427 * Joel Sherrill has contributed support for several standalone boards that
5428 run without an operating system.
5430 * `printf', `scanf' and friends now accept a `q' type modifier for long
5431 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5433 * All of the code taken from BSD (notably most of the math and networking
5434 routines) has been updated from the BSD 4.4-Lite release.
5436 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5438 * The new functions `getdomainname' and `setdomainname' fetch or change the
5439 YP/NIS domain name. These are system calls which exist on systems which
5442 * The time zone data files have been updated for the latest international
5445 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5446 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5450 * The C library now includes support for Sun RPC, from Sun's free
5451 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5452 are included. (There is still no support for YP.)
5454 * Tom Quinn has contributed a port of the C library to SGI machines running
5455 Irix 4 (mips-sgi-irix4).
5457 * The new `lockf' function is a simplified interface to the locking
5458 facilities of `fcntl', included for compatibility.
5460 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5462 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5464 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5467 * The error message printed by `assert' for a failed assertion now includes
5468 the name of the program (if using GNU ld) and the name of the calling
5469 function (with versions of GCC that support this).
5471 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5473 * The library now includes the <sys/mman.h> header file and memory
5474 management functions `mmap', `munmap', `mprotect', `msync', and
5475 `madvise', on systems that support those facilities.
5477 * The interface for `mcheck' has changed slightly: the function called to
5478 abort the program when an allocation inconsistency is detected now takes
5479 an argument that indicates the type of failure. The new function
5480 `mprobe' lets you request a consistency check for a particular block at
5481 any time (checks are normally done only when you call `free' or `realloc'
5484 * It is now possible to easily cross-compile the C library, building on one
5485 system a library to run on another machine and/or operating system. All
5486 you need to do is set the variable `HOST_CC' in `configparms' to the
5487 native compiler for programs to run on the machine you are building on (a
5488 few generator programs are used on Unix systems); set `CC' to the
5491 * The new function `fexecve' (only implemented on the GNU system) executes
5492 a program file given a file descriptor already open on the file.
5496 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5497 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5499 * You can set the variable `libprefix' in `configparms' to specify a prefix
5500 to be prepended to installed library files; this makes it easy to install
5501 the GNU C library to be linked as `-lgnuc' or whatever.
5503 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5504 copies a limited number of characters from a string, and returns the
5505 address of the last character written.
5507 * You no longer need to check for whether the installed `stddef.h' is
5508 compatible with the GNU C library. configure now checks for you.
5510 * You can now define a per-stream `fileno' function to convert the
5511 stream's cookie into an integral file descriptor.
5513 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5514 allocates zero bytes of storage, and returns a unique pointer which
5515 you can pass to `realloc' or `free'. The behavior is undefined if
5516 you dereference this pointer.
5518 * The C library now runs on Sony NEWS m68k machines running either
5519 NewsOS 3 or NewsOS 4.
5521 * The new `syscall' function is a system-dependent primitive function
5522 for invoking system calls. It has the canonical behavior on Unix
5523 systems, including unreliable return values for some calls (such as
5524 `pipe', `fork' and `getppid').
5526 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5527 to `EAGAIN', which is the preferred name. On systems whose kernels
5528 use two distinct codes, the C library now translates EWOULDBLOCK to
5529 EAGAIN in every system call function.
5533 * The GNU C Library Reference Manual is now distributed with the library.
5534 `make dvi' will produce a DVI file of the printed manual.
5535 `make info' will produce Info files that you can read on line using C-h i
5536 in Emacs or the `info' program.
5537 Please send comments on the manual to bug-glibc-manual@gnu.org.
5539 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5541 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5543 * Jason Merrill has contributed a port to the Sequent Symmetry running
5544 Dynix version 3 (i386-sequent-dynix).
5546 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5547 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5549 * New function `memory_warnings' lets you arrange to get warnings when
5550 malloc is running out of memory to allocate, like Emacs gives you.
5552 * The C library now contains the relocating allocator used in Emacs 19 for
5553 its editing buffers. This allocator (ralloc) minimizes allocation
5554 overhead and fragmentation by moving allocated regions around whenever it
5555 needs to. You always refer to a ralloc'd region with a "handle" (a
5556 pointer to a pointer--an object of type `void **').
5558 * There is a new `printf' format: `%m' gives you the string corresponding
5559 to the error code in `errno'.
5561 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5562 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5563 pass, the `a' modifier says to fill in a `char **' you pass with a
5566 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5567 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5568 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5570 * `mkstemp' is a traditional Unix function to atomically create and open a
5571 uniquely-named temporary file.
5575 * The standard location for the file that says what the local timezone is
5576 has changed again. It is now `/usr/local/etc/localtime' (or more
5577 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5579 * The distribution no longer contains any files with names longer than 14
5582 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5583 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5585 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5589 * The configuration process has changed quite a bit. The `configure'
5590 script is now used just like the configuration scripts for other GNU
5591 packages. The `sysdeps' directory hierarchy is much rearranged.
5592 The file `INSTALL' explains the new scheme in detail.
5594 * The header files no longer need to be processed into ANSI C and
5595 traditional C versions. There is just one set of files to install, and
5596 it will work with ANSI or old C compilers (including `gcc -traditional').
5598 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5599 MIPS DECStation running Ultrix 4.
5601 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5602 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5603 made itself into a shared library.
5605 * Yet further improved support for the i386, running 4.3 BSD-like systems
5606 (such as Mach 3 with the Unix single-server), or System V.
5608 * New function `strncasecmp' to do case-insensitive string comparison
5609 with limited length.
5611 * New function `strsep' is a reentrant alternative to `strtok'.
5613 * New functions `scandir' and `alphasort' for searching directories.
5615 * New function `setenv' is a better interface to `putenv'.
5617 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5618 function for traversing a directory tree.
5620 * The GNU obstack package is now also part of the C library.
5621 The new function `open_obstack_stream' creates a stdio stream that
5622 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5623 formatted output directly to an obstack.
5625 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5626 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5628 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5630 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5631 things to your strings.
5633 * There are some new test programs: test-fseek, testmb, and testrand.
5635 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5636 These ports are not finished, but are a good starting place for really
5637 supporting those systems.
5639 * `/etc/localtime' is now the standard location for the file that says what
5640 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5641 This follows the general principle that `/etc' is the place for all local
5642 configuration files.
5644 * The C library header files now use `extern "C"' when used by the C++
5645 compiler, so the C library should now work with C++ code.
5647 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5648 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5651 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5652 function which uses the `merge sort' algorithm, and is said to be
5653 significantly faster than the old GNU `qsort' function. Merge sort is
5654 now the standard `qsort' function. The new algorithm can require a lot
5655 of temporary storage; so, the old sorting function is called when the
5656 required storage is not available.
5658 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5659 provides the Unix `crypt' function, plus some other entry points.
5661 * The code and header files taken from 4.4 BSD have been updated with the
5662 latest files released from Berkeley.
5664 ----------------------------------------------------------------------
5665 Copyright information:
5667 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5669 Permission is granted to anyone to make or distribute verbatim copies
5670 of this document as received, in any medium, provided that the
5671 copyright notice and this permission notice are preserved,
5672 thus giving the recipient permission to redistribute in turn.
5674 Permission is granted to distribute modified versions
5675 of this document, or of portions of it,
5676 under the above conditions, provided also that they
5677 carry prominent notices stating who last changed them.
5680 version-control: never