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 [Add new features here]
14 Deprecated and removed features, and other changes affecting compatibility:
16 [Add deprecations, removals and changes affecting compatibility here]
18 Changes to build and runtime requirements:
20 [Add changes to build and runtime requirements here]
22 Security related changes:
24 [Add security related changes here]
26 The following bugs are resolved with this release:
28 [The release manager will add the list generated by
29 scripts/list-fixed-bugs.py just before the release.]
36 * Unicode 12.1.0 Support: Character encoding, character type info, and
37 transliteration tables are all updated to Unicode 12.1.0, using
38 generator scripts contributed by Mike FABIAN (Red Hat).
40 * The dynamic linker accepts the --preload argument to preload shared
41 objects, in addition to the LD_PRELOAD environment variable.
43 * The twalk_r function has been added. It is similar to the existing
44 twalk function, but it passes an additional caller-supplied argument
45 to the callback function.
47 * On Linux, the getdents64, gettid, and tgkill functions have been added.
49 * Minguo (Republic of China) calendar support has been added as an
50 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
53 * The entry for the new Japanese era has been added for ja_JP locale.
55 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
56 pvalloc, memalign, and posix_memalign fail now with total object size
57 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
58 pointer subtraction within the allocated object, where results might
59 overflow the ptrdiff_t type.
61 * The dynamic linker no longer refuses to load objects which reference
62 versioned symbols whose implementation has moved to a different soname
63 since the object has been linked. The old error message, symbol
64 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
65 link time reference, is gone.
67 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
68 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
69 functions. These behave similarly to their "timed" equivalents, but also
70 accept a clockid_t parameter to determine which clock their timeout should
71 be measured against. All functions allow waiting against CLOCK_MONOTONIC
72 and CLOCK_REALTIME. The decision of which clock to be used is made at the
73 time of the wait (unlike with pthread_condattr_setclock, which requires
74 the clock choice at initialization time).
76 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
77 work, new resolvers can use a second argument which can be extended in
78 the future, currently it contains the AT_HWCAP2 value.
80 Deprecated and removed features, and other changes affecting compatibility:
82 * The copy_file_range function fails with ENOSYS if the kernel does not
83 support the system call of the same name. Previously, user space
84 emulation was performed, but its behavior did not match the kernel
85 behavior, which was deemed too confusing. Applications which use the
86 copy_file_range function can no longer rely on glibc to provide a fallback
87 on kernels that do not support the copy_file_range system call, and if
88 this function returns ENOSYS, they will need to use their own fallback.
89 Support for copy_file_range for most architectures was added in version
90 4.5 of the mainline Linux kernel.
92 * The functions clock_gettime, clock_getres, clock_settime,
93 clock_getcpuclockid, clock_nanosleep were removed from the librt library
94 for new applications (on architectures which had them). Instead, the
95 definitions in libc will be used automatically, which have been available
98 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
99 and <sys/stropts.h> have been removed.
101 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
102 resolver flag (deprecated in glibc 2.25) have been removed.
104 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
105 resolver have been removed from <resolv.h>.
107 * With --enable-bind-now, installed programs are now linked with the
110 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
111 configurations) has been removed, following the deprecation of this
112 subarchitecture in version 8 of GCC, and its removal in version 9.
114 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
115 header have been removed.
117 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
118 deprecated and will be removed from a future version of glibc.
119 Application should directly access /proc instead. For obtaining random
120 bits, the getentropy function can be used.
122 Changes to build and runtime requirements:
124 * GCC 6.2 or later is required to build the GNU C Library.
126 Older GCC versions and non-GNU compilers are still supported when
127 compiling programs that use the GNU C Library.
129 Security related changes:
131 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
132 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
133 has undefined behavior. On x32, the size_t argument may be passed
134 in the lower 32 bits of the 64-bit RDX register with non-zero upper
135 32 bits. When it happened with the sign bit of RDX register set,
136 memcmp gave the wrong result since it treated the size argument as
137 zero. Reported by H.J. Lu.
139 CVE-2019-9169: Attempted case-insensitive regular-expression match
140 via proceed_next_node in posix/regexec.c leads to heap-based buffer
141 over-read. Reported by Hongxu Chen.
143 The following bugs are resolved with this release:
145 [2872] locale: Transliteration Cyrillic -> ASCII fails
146 [6399] libc: gettid() should have a wrapper
147 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
148 [16976] glob: fnmatch unbounded stack VLA for collating symbols
149 [17396] localedata: globbing for locale by [[.collating-element.]]
150 [18035] dynamic-link: pldd does no longer work, enters infinite loop
151 [18465] malloc: memusagestat is built using system C library
152 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
153 invalid input drops valid char
154 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
155 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
156 [21897] localedata: Afar locales: Fix mon, abmon, and abday
157 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
158 [23352] malloc: __malloc_check_init still defined in public header
160 [23403] nptl: Wrong alignment of TLS variables
161 [23501] libc: nftw() doesn't return dangling symlink's inode
162 [23733] malloc: Check the count before calling tcache_get()
163 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
165 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
166 [23844] nptl: pthread_rwlock_trywrlock results in hang
167 [23983] argparse: Missing compat versions of argp_failure and argp_error
168 for long double = double
169 [23984] libc: Missing compat versions of err.h and error.h functions for
171 [23996] localedata: Dutch salutations
172 [24040] libc: riscv64: unterminated call chain in __thread_start
173 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
175 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
176 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
178 [24114] regex: regexec buffer read overrun in "grep -i
179 '\(\(\)*.\)*\(\)\(\)\1'"
180 [24122] libc: Segfaults if 0 returned from la_version
181 [24153] stdio: Some input functions do not react to stdin assignment
182 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
183 RDX is set) (CVE-2019-7309)
184 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
185 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
186 not the default "nor"
187 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
188 false positives, change to modern flexible array
189 [24180] nptl: pthread_mutex_trylock does not use the correct order of
190 instructions while maintaining the robust mutex list due to missing
192 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
193 unnecessary librt dependencies
194 [24200] localedata: Revert first_weekday removal in en_IE locale
195 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
196 [24215] nptl: pthread_timedjoin_np should be a cancellation point
197 [24216] malloc: Check for large bin list corruption when inserting
199 [24228] stdio: old x86 applications that use legacy libio crash on exit
200 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
202 [24293] localedata: Missing Minguo calendar support for TW locales
203 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
205 [24307] localedata: Update locale data to Unicode 12.0.0
206 [24323] dynamic-link: dlopen should not be able open PIE objects
207 [24335] build: "Obsolete types detected" with Linux 5.0 headers
208 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
210 [24370] localedata: Add lang_name for tt_RU locale
211 [24372] locale: Binary locale files are not architecture independent
212 [24394] time: strptime %Ey mis-parses final year of era
213 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
215 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
217 [24531] malloc: Malloc tunables give tcache assertion failures
218 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
220 [24535] localedata: Update locale data to Unicode 12.1.0
221 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
222 kernels and break testing
223 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
224 [24556] build: [GCC 9] error: ā%sā directive argument is null
225 [-Werror=format-overflow=]
226 [24570] libc: alpha: compat msgctl uses __IPC_64
227 [24584] locale: Data race in __wcsmbs_clone_conv
228 [24588] stdio: Remove codecvt vtables from libio
229 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
231 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
232 [24632] stdio: Old binaries which use freopen with default stdio handles
234 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
236 [24652] localedata: szl_PL spelling correction
237 [24695] nss: nss_db: calling getpwent after endpwent crashes
238 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
239 in /etc/nsswitch.conf
240 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
241 [24740] libc: getdents64 type confusion
242 [24741] dynamic-link: ld.so should not require that a versioned symbol is
243 always implemented in the same library
244 [24744] libc: Remove copy_file_range emulation
245 [24757] malloc: memusagestat is linked against system libpthread
246 [24794] libc: Partial test suite run builds corrupt test-in-container
254 * The getcpu wrapper function has been added, which returns the currently
255 used CPU and NUMA node. This function is Linux-specific.
257 * A new convenience target has been added for distribution maintainers
258 to build and install all locales as directories with files. The new
259 target is run by issuing the following command in your build tree:
260 'make localedata/install-locale-files', with an optional DESTDIR
261 to set the install root if you wish to install into a non-default
264 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
266 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
267 for _GNU_SOURCE, to match BSD environments.
269 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
270 indicates that it will abort the transaction prior to entering the kernel
271 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
272 suspended, and this caused some undefined side-effects issues by aborting
273 transactions manually. Glibc avoided it by abort transactions manually on
274 each syscall, but it lead to performance issues on newer kernels where the
275 HTM state is saved and restore lazily (the state being saved even when the
276 process actually does not use HTM).
278 * The functions posix_spawn_file_actions_addchdir_np and
279 posix_spawn_file_actions_addfchdir_np have been added, enabling
280 posix_spawn and posix_spawnp to run the new process in a different
281 directory. These functions are GNU extensions. The function
282 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
285 * The popen and system do not run atfork handlers anymore (BZ#17490).
286 Although it is a possible POSIX violation, the POSIX rationale in
287 pthread_atfork documentation regarding atfork handlers is to handle
288 inconsistent mutex state after a fork call in a multi-threaded process.
289 In both popen and system there is no direct access to user-defined mutexes.
291 * Support for the C-SKY ABIV2 running on Linux has been added. This port
292 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
294 - C-SKY ABIV2 soft-float little-endian
295 - C-SKY ABIV2 hard-float little-endian
297 * strftime's default formatting of a locale's alternative year (%Ey)
298 has been changed to zero-pad the year to a minimum of two digits,
299 like "%y". This improves the display of Japanese era years during
300 the first nine years of a new era, and is expected to be harmless
301 for all other locales (only Japanese locales regularly have
302 alternative year numbers less than 10). Zero-padding can be
303 overridden with the '_' or '-' flags (which are GNU extensions).
305 * As a GNU extension, the '_' and '-' flags can now be applied to
306 "%EY" to control how the year number is formatted; they have the
307 same effect that they would on "%Ey".
309 Deprecated and removed features, and other changes affecting compatibility:
311 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
312 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
314 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
315 in <sys/procfs.h>, has been corrected to match the type actually used by
316 the Linux kernel. This affects the size and layout of that structure on
317 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
319 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
320 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
321 defined in <sys/procfs.h>, has been corrected to match the type actually
322 used by the Linux kernel. This affects the size and layout of those
325 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
326 meant to scan a string and allocate space for it with malloc, is now
327 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
328 defined. This extension conflicts with C99's use of '%a' to scan a
329 hexadecimal floating-point number, which is now available to programs
330 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
332 POSIX.1-2008 includes the feature of allocating a buffer for string input
333 with malloc, using the modifier letter 'm' instead. Programs using
334 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
335 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
336 C99 '%a' no longer need to avoid _GNU_SOURCE.
338 GCC's -Wformat warnings can detect most uses of this extension, as long
339 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
340 __attribute__ ((format (scanf, ...))).
342 Changes to build and runtime requirements:
344 * Python 3.4 or later is required to build the GNU C Library.
346 * On most architectures, GCC 5 or later is required to build the GNU C
347 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
349 Older GCC versions and non-GNU compilers are still supported when
350 compiling programs that use the GNU C Library.
352 Security related changes:
354 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
355 denial of service due to resource exhaustion when processing getaddrinfo
356 calls with crafted host names. Reported by Guido Vranken.
358 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
359 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
360 happened, accessing the 32-bit size_t value as the full 64-bit register
361 in the assembly string/memory functions would cause a buffer overflow.
364 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
365 addresses with arbitrary trailing characters, potentially leading to data
366 or command injection issues in applications.
368 The following bugs are resolved with this release:
370 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
371 [10496] localedata: 12h time representation in multiple locales faulty
372 [10797] localedata: it_IT locale numeric does not have a separator for
374 [11319] libc: dprintf doesn't handle errors properly
375 [16346] time: mktime: potentially unsafe use of localtime_offset
376 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
378 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
379 posix_spawn_file_actions_addfchdir_np
380 [17426] localedata: Indian locales: set the correct date format
381 [17490] stdio: popen should not invoke atfork handlers
382 [17783] libc: TIOCSER_TEMT conditions inconsistent
383 [18040] regex: use-after-free in regexec/get_subexp
384 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
385 [20018] network: getaddrinfo should reject IP addresses with trailing
386 characters (CVE-2016-10739)
387 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
388 [20271] libc: Missing "\n" in __libc_fatal calls
389 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
390 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
391 pointer argument is non-NULL
392 [21037] stdio: open_memstream and freopen
393 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
394 [21716] time: Crash in glibc's mktime in low-memory situations
395 [22834] stdio: Subprocess forked by popen may crash in Linux when
396 multithreads call popen
397 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
398 and pthread_create fails.
399 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
400 [23125] libc: riscv64: endless loop when throwing an exception from a
402 [23275] nptl: Race in pthread_mutex_lock while promoting to
403 PTHREAD_MUTEX_ELISION_NP.
404 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
406 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
408 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
410 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
411 [23509] dynamic-link: CET enabled glibc is incompatible with the older
413 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
414 [23521] nss: get_next_alias nss_files file stream leak
415 [23538] nptl: Hang in pthread_cond_broadcast
416 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
417 [23578] regex: Invalid memory access if regex pattern contains NUL byte
418 [23579] libc: Errors misreported in preadv2
419 [23597] build: support/test-container.c doesn't work with different
421 [23603] time: mktime signed integer overflow on large timestamps
422 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
423 [23614] libc: powerpc: missing CFI register information in __mpn_*
425 [23637] string: Generic strstr/strcasestr fails with huge needles
426 [23640] libc: no way to easily clear FD_CLOEXEC in
427 posix_spawn_file_actions_adddup2()
428 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
430 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
432 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
433 [23689] libc: Bug in documentation for rusage.ru_ixrss in
434 bits/types/struct_rusage.h
435 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
437 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
439 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
440 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
441 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
443 [23724] localedata: Albanian date formats are incorrect
444 [23735] math: libnldbl_nonshared.a references internal libm symbols
445 [23740] localedata: kl_GL: Month names and date formats need update
446 [23744] regex: regex refactorings to remove BE, avoid duplication
447 [23745] time: mktime fix for Gnulib + coreutils
448 [23758] time: Improve the width of alternate representation for year in
450 [23783] libc: [mips] Missing CMSPAR bits/termios.h
451 [23789] time: mktime does not set errno on failure
452 [23791] localedata: Wrong monetary format for ca_ES locale
453 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
454 [23794] locale: c16rtomb does not handle surrogate pairs
455 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
456 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
457 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
458 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
459 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
460 [23862] libc: [sh] missing kernel-features.h undefines
461 [23864] libc: [riscv] missing kernel-features.h undefines
462 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
463 [23907] malloc: Incorrect double-free malloc tcache check disregards
465 [23913] libc: off-by-one in function maybe_script_execute in
466 sysdeps/posix/spawni.c
467 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
468 [23923] locale: Add --no-hard-links option to localedef
469 [23927] network: Linux if_nametoindex() does not close descriptor
471 [23961] math: powf can overflow to inf without setting errno in non-
472 nearest rounding mode
473 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
474 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
475 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
476 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
477 [24011] localedata: Fixed small type in comment for locale bs_BA
478 [24018] libc: gettext() may return NULL
479 [24022] build: riscv build failure with Linux kernel 4.20-rc7
480 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
481 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
483 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
484 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
486 [24046] localedata: en_US locale doesn't define date_fmt
487 [24063] manual: @var{errno} should be @code{errno}
488 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
489 [24088] libc: VSCR field is not being correctly read in ucontext_t on
491 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
493 [24097] string: Can't use 64-bit register for size_t in assembly codes for
495 [24110] hurd: SS_DISABLE never set in stack_t value returned by
497 [24112] network: Do not send DNS queries for non-host names (where all
498 answers will be rejected)
499 [24130] libc: alpha __remqu corrupts $f3 register
506 * The localization data for ISO 14651 is updated to match the 2016
507 Edition 4 release of the standard, this matches data provided by
508 Unicode 9.0.0. This update introduces significant improvements to the
509 collation of Unicode characters. This release deviates slightly from
510 the standard in that the collation element ordering for lowercase and
511 uppercase LATIN script characters is adjusted to ensure that regular
512 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
513 is not matched by [a-z]. With the update many locales have been
514 updated to take advantage of the new collation information. The new
515 collation information has increased the size of the compiled locale
516 archive or binary locales.
518 * The GNU C Library can now be compiled with support for Intel CET, AKA
519 Intel Control-flow Enforcement Technology. When the library is built
520 with --enable-cet, the resulting glibc is protected with indirect
521 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
522 compatible with all existing executables and shared libraries. This
523 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
524 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
525 capable of multi-byte NOPs, like x86-64 processors as well as Intel
526 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
527 x86_64 and x32 on non-CET processors. --enable-cet has been tested
528 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
531 * The GNU C Library now has correct support for ABSOLUTE symbols
532 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
533 relocated incorrectly or in some cases discarded. The GNU linker can
534 make use of the newer semantics, but it must communicate it to the
535 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
536 field) to indicate such support is required.
538 * Unicode 11.0.0 Support: Character encoding, character type info, and
539 transliteration tables are all updated to Unicode 11.0.0, using
540 generator scripts contributed by Mike FABIAN (Red Hat).
542 * <math.h> functions that round their results to a narrower type are added
543 from TS 18661-1:2014 and TS 18661-3:2015:
545 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
548 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
551 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
554 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
557 * Two grammatical forms of month names are now supported for the following
558 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
559 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
560 support two grammatical forms in abbreviated month names: Catalan, Greek,
563 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
564 include the support for two grammatical forms of month names.
566 * Building and running on GNU/Hurd systems now works without out-of-tree
569 * The renameat2 function has been added, a variant of the renameat function
570 which has a flags argument. If the flags are zero, the renameat2 function
571 acts like renameat. If the flag is not zero and there is no kernel
572 support for renameat2, the function will fail with an errno value of
573 EINVAL. This is different from the existing gnulib function renameatu,
574 which performs a plain rename operation in case of a RENAME_NOREPLACE
575 flags and a non-existing destination (and therefore has a race condition
576 that can clobber the destination inadvertently).
578 * The statx function has been added, a variant of the fstatat64
579 function with an additional flags argument. If there is no direct
580 kernel support for statx, glibc provides basic stat support based on
581 the fstatat64 function.
583 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
584 library if installed. libidn2 version 2.0.5 or later is recommended. If
585 libidn2 is not available, internationalized domain names are not encoded
586 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
587 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
588 with an encoding error.) Flags which used to change the IDN encoding and
589 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
590 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
591 deprecated. They no longer have any effect.
593 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
594 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
595 range of ELF gABI expressions including such constructs as
596 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
597 have been further restricted, and where in the past a dynamic string
598 token sequence may have been interpreted as a literal string it will
599 now cause a load failure. These load failures were always considered
600 unspecified behaviour from the perspective of the dynamic loader, and
601 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
602 results in a load failure now.
604 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
605 implementation includes all the standard functions provided by
608 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
609 thrd_detach, thrd_exit, and thrd_join for thread management.
611 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
612 mtx_destroy for mutual exclusion.
614 - call_once for function call synchronization.
616 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
617 cnd_wait for conditional variables.
619 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
621 Application developers must link against libpthread to use ISO C threads.
623 Deprecated and removed features, and other changes affecting compatibility:
625 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
626 installed. Software that was using either header should be updated to
627 use standard <stdio.h> interfaces instead.
629 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
630 This was never required by the C standard, and the macros just expanded
631 to call alternative names for the same functions. If you hoped getc and
632 putc would provide performance improvements over fgetc and fputc, instead
633 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
634 necessary, flockfile and funlockfile.
636 * All stdio functions now treat end-of-file as a sticky condition. If you
637 read from a file until EOF, and then the file is enlarged by another
638 process, you must call clearerr or another function with the same effect
639 (e.g. fseek, rewind) before you can read the additional data. This
640 corrects a longstanding C99 conformance bug. It is most likely to affect
641 programs that use stdio to read interactive input from a terminal.
644 * The macros 'major', 'minor', and 'makedev' are now only available from
645 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
646 headers that happen to include <sys/types.h>. These macros are rarely
647 used, not part of POSIX nor XSI, and their names frequently collide with
648 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
651 <sys/sysmacros.h> is a GNU extension. Portable programs that require
652 these macros should first include <sys/types.h>, and then include
653 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
655 * The tilegx*-*-linux-gnu configurations are no longer supported.
657 * The obsolete function ustat is no longer available to newly linked
658 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
659 function has been deprecated in favor of fstatfs and statfs.
661 * The obsolete function nfsservctl is no longer available to newly linked
662 binaries. This function was specific to systems using the Linux kernel
663 and could not usefully be used with the GNU C Library on systems with
664 version 3.1 or later of the Linux kernel.
666 * The obsolete function name llseek is no longer available to newly linked
667 binaries. This function was specific to systems using the Linux kernel
668 and was not declared in a header. Programs should use the lseek64 name
669 for this function instead.
671 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
672 getaddrinfo and getnameinfo functions have been deprecated. The behavior
673 previously selected by them is now always enabled.
675 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
676 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
677 restriction (rejecting '_' in host names, among other things) has been
678 removed, for increased compatibility with non-IDN name resolution.
680 * The fcntl function now have a Long File Support variant named fcntl64. It
681 is added to fix some Linux Open File Description (OFD) locks usage on non
682 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
683 fcntl and LFS support is handled transparently. Also for Linux, the OFD
684 locks act as a cancellation entrypoint.
686 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
687 ecb_crypt, and des_setparity are no longer available to newly linked
688 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
689 longer installed. These functions encrypted and decrypted data with the
690 DES block cipher, which is no longer considered secure. Software that
691 still uses these functions should switch to a modern cryptography library,
694 * Reflecting the removal of the encrypt and setkey functions above, the
695 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
696 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
699 * The obsolete function fcrypt is no longer available to newly linked
700 binaries. It was just another name for the standard function crypt,
701 and it has not appeared in any header file in many years.
703 * We have tentative plans to hand off maintenance of the passphrase-hashing
704 library, libcrypt, to a separate development project that will, we hope,
705 keep up better with new passphrase-hashing algorithms. We will continue
706 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
707 'crypt_r' should not need to change at all; however, distributions will
708 need to install <crypt.h> and libcrypt from a separate project.
710 In this release, if the configure option --disable-crypt is used, glibc
711 will not install <crypt.h> or libcrypt, making room for the separate
712 project's versions of these files. The plan is to make this the default
713 behavior in a future release.
715 Changes to build and runtime requirements:
717 GNU make 4.0 or later is now required to build glibc.
719 Security related changes:
721 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
722 been fixed by removing the glibc-internal IDNA implementation and using
723 the system-provided libidn2 library instead. Originally reported by Hanno
724 Bƶck and Christian Weisgerber.
726 CVE-2017-18269: An SSE2-based memmove implementation for the i386
727 architecture could corrupt memory. Reported by Max Horn.
729 CVE-2018-11236: Very long pathname arguments to realpath function could
730 result in an integer overflow and buffer overflow. Reported by Alexey
733 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
734 architecture could write beyond the target buffer, resulting in a buffer
735 overflow. Reported by Andreas Schwab.
737 The following bugs are resolved with this release:
739 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
740 [6889] manual: 'PWD' mentioned but not specified
741 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
742 when __WORDSIZE != 64
743 [13762] regex: re_search etc. should return -2 on memory exhaustion
744 [13888] build: /tmp usage during testing
745 [13932] math: dbl-64 pow unexpectedly slow for some inputs
746 [14092] nptl: Support C11 threads
747 [14095] localedata: Review / update collation data from Unicode / ISO
749 [14508] libc: -Wformat warnings
750 [14553] libc: Namespace pollution loff_t in sys/types.h
751 [14890] libc: Make NT_PRFPREG canonical.
752 [15105] libc: Extra PLT references with -Os
753 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
755 [16335] manual: Feature test macro documentation incomplete and out of
757 [16552] libc: Unify umount implementations in terms of umount2
758 [17082] libc: htons et al.: statement-expressions prevent use on global
759 scope with -O1 and higher
760 [17343] libc: Signed integer overflow in /stdlib/random_r.c
761 [17438] localedata: pt_BR: wrong d_fmt delimiter
762 [17662] libc: please implement binding for the new renameat2 syscall
763 [17721] libc: __restrict defined as /* Ignore */ even in c11
764 [17979] libc: inconsistency between uchar.h and stdint.h
765 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
766 [18023] libc: extend_alloca is broken (questionable pointer comparison,
767 horrible machine code)
768 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
770 [18471] libc: llseek should be a compat symbol
771 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
773 [18991] nss: nss_files skips large entry in database
774 [19239] libc: Including stdlib.h ends up with macros major and minor being
776 [19463] libc: linknamespace failures when compiled with -Os
777 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
778 [19527] locale: Normalized charset name not recognized by setlocale
779 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
780 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
782 [19728] network: out of bounds stack read in libidn function
783 idna_to_ascii_4i (CVE-2016-6261)
784 [19729] network: out of bounds heap read on invalid utf-8 inputs in
785 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
786 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
788 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
789 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
790 [20419] dynamic-link: files with large allocated notes crash in
792 [20530] libc: bswap_16 should use __builtin_bswap16() when available
793 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
794 [20980] manual: CFLAGS environment variable replaces vital options
795 [21163] regex: Assertion failure in pop_fail_stack when executing a
796 malformed regexp (CVE-2015-8985)
797 [21234] manual: use of CFLAGS makes glibc detect no optimization
798 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
799 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
800 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
801 [21508] locale: intl/tst-gettext failure with latest msgfmt
802 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
803 [21812] network: getifaddrs() returns entries with ifa_name == NULL
804 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
806 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
808 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
809 [22247] network: Integer overflow in the decode_digit function in
810 puny_decode.c in libidn (CVE-2017-14062)
811 [22342] nscd: NSCD not properly caching netgroup
812 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
813 [22550] localedata: es_ES locale (and other es_* locales): collation
814 should treat Ʊ as a primary different character, sync the collation
815 for Spanish with CLDR
816 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
817 by gcc configured with --enable-default-pie
818 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
819 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
820 crossing 2GB threshold (CVE-2017-18269)
821 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
823 [22735] time: Misleading typo in time.h source comment regarding
825 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
826 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
827 `__assert_perror_fail ()' to `__assert_fail_base ()'
828 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
830 [22786] libc: Stack buffer overflow in realpath() if input size is close
831 to SSIZE_MAX (CVE-2018-11236)
832 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
833 through an absolute DT_NEEDED path
834 [22792] build: tcb-offsets.h dependency dropped
835 [22797] libc: pkey_get() uses non-reserved name of argument
836 [22807] libc: PTRACE_* constants missing for powerpc
837 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
838 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
839 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
840 [22848] localedata: ca_ES: update date definitions from CLDR
841 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
842 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
843 [22896] localedata: Update locale data for an_ES
844 [22902] math: float128 test failures with GCC 8
845 [22918] libc: multiple common of `__nss_shadow_database'
846 [22919] libc: sparc32: backtrace yields infinite backtrace with
848 [22926] libc: FTBFS on powerpcspe
849 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
851 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
852 [22947] libc: FAIL: misc/tst-preadvwritev2
853 [22963] localedata: cs_CZ: Add alternative month names
854 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
855 [22996] localedata: change LC_PAPER to en_US in es_BO locale
856 [22998] dynamic-link: execstack tests are disabled when SELinux is
858 [23005] network: Crash in __res_context_send after memory allocation
860 [23007] math: strtod cannot handle -nan
861 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
862 [23036] regex: regex equivalence class regression
863 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
864 [23069] libc: sigaction broken on riscv64-linux-gnu
865 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
866 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
867 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
868 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
869 and libc build with -Os)
870 [23140] localedata: More languages need two forms of month names
871 [23145] libc: _init/_fini aren't marked as hidden
872 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
873 [23171] math: C++ iseqsig for long double converts arguments to double
874 [23178] nscd: sudo will fail when it is run in concurrent with commands
875 that changes /etc/passwd
876 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
878 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
879 [23208] localedata: New locale - Lower Sorbian (dsb)
880 [23233] regex: Memory leak in build_charclass_op function in file
882 [23236] stdio: Harden function pointers in _IO_str_fields
883 [23250] nptl: Offset of __private_ss differs from GCC
884 [23253] math: tgamma test suite failures on i686 with -march=x86-64
885 -mtune=generic -mfpmath=sse
886 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
888 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
889 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
891 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
892 [23277] math: nan function should not have const attribute
893 [23279] math: scanf and strtod wrong for some hex floating-point
894 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
896 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
897 [23303] build: undefined reference to symbol
898 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
899 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
901 [23313] stdio: libio vtables validation and standard file object
903 [23329] libc: The __libc_freeres infrastructure is not properly run across
905 [23349] libc: Various glibc headers no longer compatible with
907 [23351] malloc: Remove unused code related to heap dumps and malloc
909 [23363] stdio: stdio-common/tst-printf.c has non-free license
910 [23396] regex: Regex equivalence regression in single-byte locales
911 [23422] localedata: oc_FR: More updates of locale data
912 [23442] build: New warning with GCC 8
913 [23448] libc: Out of bounds access in IBM-1390 converter
914 [23456] libc: Wrong index_cpu_LZCNT
915 [23458] build: tst-get-cpu-features-static isn't added to tests
916 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
918 [23467] dynamic-link: x86/CET: A property note parser bug
925 * The GNU C Library can now be compiled with support for building static
926 PIE executables (See --enable-static-pie in INSTALL). These static PIE
927 executables are like static executables but can be loaded at any address
928 and provide additional security hardening benefits at the cost of some
929 memory and performance. When the library is built with --enable-static-pie
930 the resulting libc.a is usable with GCC 8 and above to create static PIE
931 executables using the GCC option '-static-pie'. This feature is currently
932 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
933 aarch64 with binutils 2.30 or later.
935 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
936 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
939 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
941 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
943 * In order to support faster and safer process termination the malloc API
944 family of functions will no longer print a failure address and stack
945 backtrace after detecting heap corruption. The goal is to minimize the
946 amount of work done after corruption is detected and to avoid potential
947 security issues in continued process execution. Reducing shutdown time
948 leads to lower overall process restart latency, so there is benefit both
949 from a security and performance perspective.
951 * The abort function terminates the process immediately, without flushing
952 stdio streams. Previous glibc versions used to flush streams, resulting
953 in deadlocks and further data corruption. This change also affects
954 process aborts as the result of assertion failures.
956 * On platforms where long double has the IEEE binary128 format (aarch64,
957 alpha, mips64, riscv, s390 and sparc), the math library now implements
958 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
959 These are the same interfaces added in version 2.26 for some platforms where
960 this format is supported but is not the format of long double.
962 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
963 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
964 implements interfaces for that type, as defined by ISO/IEC TS
965 18661-3:2015. These are corresponding interfaces to those supported for
968 * The math library now implements interfaces for the _Float32, _Float64 and
969 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
970 corresponding interfaces to those supported for _Float128.
972 * glibc now implements the memfd_create and mlock2 functions on Linux.
974 * Support for memory protection keys was added. The <sys/mman.h> header now
975 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
978 * The copy_file_range function was added.
980 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
982 * The ldconfig utility now processes `include' directives using the C/POSIX
983 collation ordering. Previous glibc versions used locale-specific
984 ordering, the change might break systems that relied on that.
986 * Support for two grammatical forms of month names has been added.
987 In a call to strftime, the "%B" and "%b" format specifiers will now
988 produce the grammatical form required when the month is used as part
989 of a complete date. New "%OB" and "%Ob" specifiers produce the form
990 required when the month is named by itself. For instance, in Greek
991 and in many Slavic and Baltic languages, "%B" will produce the month
992 in genitive case, and "%OB" will produce the month in nominative case.
994 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
995 are all valid and will all accept any known form of month
996 name---standalone or complete, abbreviated or full. In a call to
997 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
998 the strings used by "%B" and "%b", respectively. New query
999 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1000 used by "%OB" and "%Ob", respectively.
1002 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1003 define the strings for %OB and %Ob, respectively; these have the
1004 same syntax as "mon" and "abmon". These arrays are optional; if they
1005 are not provided then they have the same content as "mon" and "abmon",
1008 These features are provided for locales which define "alt_mon" and/or
1009 "ab_alt_mon" in their locale source data. This release includes such
1010 alternative month name data for the following languages: Belarusian,
1011 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1013 This feature is currently a GNU extension, but it is expected to
1014 be added to the next revision of POSIX, and it is also already
1015 available on some BSD-derived operating systems.
1017 This feature will cause existing statically compiled applications
1018 to fail to load locales and fall back to the builtin C/POSIX locales.
1019 See notes below for other changes affecting compatibility.
1021 * Support for the RISC-V ISA running on Linux has been added. This port
1022 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1023 for the following ISA and ABI pairs:
1029 Deprecated and removed features, and other changes affecting compatibility:
1031 * Statically compiled applications attempting to load locales compiled for the
1032 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1033 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1034 support for two grammatical forms of the month names, also extends the locale
1035 data binary format. Static applications needing locale support must be
1036 recompiled to match the runtime and data they are deployed with. In some
1037 distributions there is an upgrade window where dynamically linked applications
1038 may use a new library but the old locale data and also fall back to the
1039 builtin C/POSIX locales; restarting the application process is sufficient to
1042 * Support for statically linked applications which call dlopen is deprecated
1043 and will be removed in a future version of glibc. Applications which call
1044 dlopen need to be linked dynamically instead.
1046 * Support for old programs which use internal stdio data structures and
1047 functions is deprecated. This includes programs which use the C++ streams
1048 provided by libstdc++ in GCC 2.95. Programs which use the internal
1049 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1050 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1051 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1052 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1053 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1054 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1055 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1056 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1057 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1058 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1059 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1060 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1061 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1062 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1063 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1064 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1065 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1066 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1067 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1068 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1069 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1070 future version of glibc. Unlike other symbol removals, these old
1071 applications will not be supported using compatibility symbols.
1073 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1074 defined by <sys/ptrace.h>.
1076 * libm no longer supports SVID error handling (calling a user-provided
1077 matherr function on error) or the _LIB_VERSION variable to control error
1078 handling. (SVID error handling and the _LIB_VERSION variable still work
1079 for binaries linked against older versions of the GNU C Library.) The
1080 libieee.a library is no longer provided. math.h no longer defines struct
1081 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1082 TLOSS, PLOSS and HUGE.
1084 * The libm functions pow10, pow10f and pow10l are no longer supported for
1085 new programs. Programs should use the standard names exp10, exp10f and
1086 exp10l for these functions instead.
1088 * The mcontext_t type is no longer the same as struct sigcontext. On
1089 platforms where it was previously the same, this changes the C++ name
1090 mangling for interfaces involving this type.
1092 * The add-ons mechanism for building additional packages at the same time as
1093 glibc has been removed. The --enable-add-ons configure option is now
1096 * The --without-fp configure option is now ignored. Whether hardware
1097 floating-point instructions are used is now configured based on whether
1098 the compiler used at configure time (without any options implied by a
1099 --with-cpu= configure option) uses such instructions.
1101 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1102 the specified string can be parsed as a domain name.
1104 * In the malloc_info output, the <heap> element may contain another <aspace>
1105 element, "subheaps", which contains the number of sub-heaps.
1107 * The libresolv function p_secstodate is no longer supported for new
1110 * The tilepro-*-linux-gnu configuration is no longer supported.
1112 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1113 and will be removed in a future release. Software that is still using
1114 either header should be updated to use standard <stdio.h> interfaces
1117 libio.h was originally the header for a set of supported GNU extensions,
1118 but they have not been maintained as such in many years, they are now
1119 standing in the way of improvements to stdio, and we don't think there are
1120 any remaining external users. _G_config.h was never intended for public
1121 use, but predates the bits convention.
1123 Changes to build and runtime requirements:
1125 * bison version 2.7 or later is required to generate code in the 'intl'
1128 Security related changes:
1130 CVE-2009-5064: The ldd script would sometimes run the program under
1131 examination directly, without preventing code execution through the
1132 dynamic linker. (The glibc project disputes that this is a security
1133 vulnerability; only trusted binaries must be examined using the ldd
1136 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1137 suffered from a one-byte overflow during ~ operator processing (either
1138 on the stack or the heap, depending on the length of the user name).
1139 Reported by Tim RĆ¼hsen.
1141 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1142 would sometimes fail to free memory allocated during ~ operator
1143 processing, leading to a memory leak and, potentially, to a denial
1146 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1147 without GLOB_NOESCAPE, could write past the end of a buffer while
1148 unescaping user names. Reported by Tim RĆ¼hsen.
1150 CVE-2017-17426: The malloc function, when called with an object size near
1151 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1152 instead of NULL. This was a regression introduced with the new malloc
1153 thread cache in glibc 2.26. Reported by Iain Buclaw.
1155 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1156 to the allocation of too much memory. (This is not a security bug per se,
1157 it is mentioned here only because of the CVE assignment.) Reported by
1160 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1161 of the number of search path components. (This is not a security
1162 vulnerability per se because no trust boundary is crossed if the fix for
1163 CVE-2017-1000366 has been applied, but it is mentioned here only because
1164 of the CVE assignment.) Reported by Qualys.
1166 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1167 for AT_SECURE or SUID binaries could be used to load libraries from the
1170 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1171 succeeds without returning an absolute path due to unexpected behaviour
1172 of the Linux kernel getcwd syscall. Reported by halfdog.
1174 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1175 an object size near the value of SIZE_MAX, would return a pointer to a
1176 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1178 CVE-2018-6551: The malloc function, when called with an object size near
1179 the value of SIZE_MAX, would return a pointer to a buffer which is too
1180 small, instead of NULL.
1182 The following bugs are resolved with this release:
1184 [866] glob: glob should match dangling symlinks
1185 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1186 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1188 [5997] math: Very slow execution of sinf function
1189 [10580] localedata: hr_HR: updated locale
1190 [10871] locale: 'mon' array should contain both nominative and genitive
1192 [12349] localedata: eu_ES: incorrect thousands separator
1193 [13605] localedata: shn_MM: new Shan locale
1194 [13805] localedata: ru_RU: currency should use ',' as radix point
1195 [13953] localedata: km_KH: locale update
1196 [13994] localedata: mjw_IN: new locale
1197 [14121] build: make writes .mo files in po directory
1198 [14333] libc: Fix the race between atexit() and exit()
1199 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1200 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1202 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1203 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1204 width Latin characters
1205 [15332] localedata: es_CU: locale update
1206 [15436] stdio: Don't close or flush stdio streams on abort
1207 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1209 [16148] localedata: ca_ES: incorrect thousands separator
1210 [16750] dynamic-link: ldd should not try to execute the binaries
1212 [16777] localedata: pl_PL: incorrect thousands separator in locale
1213 [16905] localedata: hanzi: new collation
1214 [17563] localedata: cmn_TW: add hanzi collation
1215 [17750] localedata: wrong collation order of diacritics in most locales
1216 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1218 [17956] build: Build fails on missing definitions from header file
1219 nss/nss.h when Mozilla NSS is used for cryptography
1220 [18203] libc: realpath() does not handle unreachable paths correctly
1221 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1222 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1223 [18822] libc: Internal functions are called via PLT
1224 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1225 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1226 [19574] libc: glibc should support building static PIE binaries
1227 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1229 [19971] glob: glob: Do not skip entries with zero d_ino values
1230 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1231 [20008] localedata: km_KH: convert to translit_neutral
1232 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1233 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1234 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1235 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1236 [20498] localedata: miq_NI: new MĆskitu / Miskito (miq) language locale
1238 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1239 they're set, wrong errors returned by gaih_inet when lookup functions
1241 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1242 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1244 [20952] localedata: yuw_PG: new locale
1245 [21084] localedata: charmaps/IBM858: new codepage
1246 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1247 [21242] libc: assert gives pedantic warning in old gcc versions
1248 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1249 __regcall calling convention
1250 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1251 [21326] libc: C99 functions are not declared for C++11 and later if
1252 _GNU_SOURCE is not predefined by g++
1253 [21457] libc: sys/ucontext.h namespace
1254 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1255 [21660] math: GCC fails to compile a formula with tgmath.h
1256 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1257 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1258 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1259 [21684] math: tgmath.h handling of complex integers
1260 [21685] math: tgmath.h handling of bit-fields
1261 [21686] math: tgmath.h handling of __int128
1262 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1264 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1266 [21750] localedata: column width of characters incompatible with classical
1268 [21754] malloc: malloc: Perform as little work as possible after heap
1269 consistency check failures
1270 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1271 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1272 [21791] string: Unused XXX_chk_XXX functions in libc.a
1273 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1275 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1277 [21845] localedata: Added new Locale bho_NP
1278 [21853] localedata: Fix abday Which looks same as day in zh_SG
1279 [21854] localedata: Added New Locale en_SC
1280 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1281 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1282 _dl_runtime_resolve_avx_slow
1283 [21885] network: getaddrinfo: gethosts does not release resolver context
1284 on memory allocation failure
1285 [21899] libc: XPG4.2 sigaction namespace
1286 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1288 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1290 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1291 errno value, causing getaddrinfo to fail
1292 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1293 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1294 instead of EAI_NODATA
1295 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1296 constant PTRACE_SEIZE_DEVEL
1297 [21930] math: C-only gcc builtins used in <math.h> isinf
1298 [21932] network: Unpaired __resolv_context_get in generic get*_r
1300 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1301 [21944] libc: sigval namespace
1302 [21951] localedata: Update hanzi collation by stroke
1303 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1304 sysdeps/x86_64/fpu/e_expf.S
1305 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1306 allocation in syscall loops)
1307 [21959] localedata: Fix Country name for xh_ZA
1308 [21960] localedata: Fix abmon for bem_ZM
1309 [21966] math: AVX2 mathvec functions use FMA without checking
1310 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1311 [21971] localedata: Added New Locale for mfe_MU
1312 [21972] libc: assert macro requires operator== (int) for its argument type
1313 [21973] math: [sparc] libm missing sqrtl compat symbol
1314 [21974] libc: Remove __bb_init_func and __bb_exit_func
1315 [21982] string: stratcliff.c: error: assuming signed overflow does not
1317 [21986] stdio: __guess_grouping is called incorrectly
1318 [21987] math: [sparc32] wrong bits/long-double.h installed
1319 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1321 [22022] localedata: Missing country_name for mni_IN
1322 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1324 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1326 [22026] locale: iconv_open: heap overflow on gconv_init failure
1327 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1328 [22035] math: [m68k] bits/math-inline.h macro namespace
1329 [22038] localedata: Fix abbreviated weeks and months for Somali
1330 [22044] localedata: Remove redundant data for Limburgish Language
1331 [22050] malloc: Linking with -lmcheck does not hook
1332 __malloc_initialize_hook correctly
1333 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1334 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1335 [22070] localedata: charmaps/UTF-8: wcwidth for
1336 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1337 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1338 Jungseong and Jongseong) should be 0
1339 [22078] nss: nss_files performance issue in multi mode
1340 [22082] math: bits/math-finite.h exp10 condition
1341 [22086] libc: pcprofiledump incorrect cross-endian condition
1342 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1343 [22095] network: Name server address allocation memory leak in resolv.conf
1345 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1347 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1348 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1350 [22111] malloc: malloc: per thread cache is not returned when thread exits
1351 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1352 [22134] libc: [linux] implement fexecve with execveat
1353 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1355 [22145] libc: ttyname() gives up too early in the face of namespaces
1356 [22146] math: C++ build issue with float128 on x86_64
1357 [22153] nptl: nptl: save error code before process termination
1358 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1359 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1360 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1361 [22165] libc: [hppa] Text relocations in libc.so
1362 [22180] libc: destructor registered via __cxa_atexit is called twice
1363 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1364 symlinks") cause "make" segfaults
1365 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1367 [22207] libc: FAIL: stdlib/test-atexit-race
1368 [22225] math: nearbyint arithmetic moved before feholdexcept
1369 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1370 [22235] math: iscanonical in C++ and float128
1371 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1372 the svid compat wrapper
1373 [22244] math: ynf and yn are wrong without the svid compat wrapper
1374 [22273] libc: Improper assert in Linux posix_spawn implementation
1375 [22284] libc: -pg -pie doesn't work
1376 [22292] locale: localedef exits with error 4 when it should be error 1
1377 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1378 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1380 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1381 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1383 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1384 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1385 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1386 [22322] libc: [mips64] wrong bits/long-double.h installed
1387 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1388 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1390 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1391 [22343] malloc: Integer overflow in posix_memalign
1392 [22347] libc: getrandom() returns the number of bytes that were copied to
1393 the buffer even though the comments say "Return 0 on success and -1 on
1395 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1396 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1398 [22370] dynamic-link: Incorrect note padding check
1399 [22375] libc: malloc returns pointer from tcache_get when should return
1400 NULL (CVE-2017-17426)
1401 [22377] math: iseqsig, float128 and C++
1402 [22382] localedata: Error in tpi_PG locale
1403 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1404 inside the ASCII printable range
1405 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1407 [22403] localedata: Slash needs escaping in some locales
1408 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1409 [22409] network: res_hnok does not accept some host names used on the
1411 [22412] network: res_dnok, res_hnok should perform syntax checks
1412 [22413] network: ns_name_pton ignores syntactically invalid trailing
1414 [22415] stdio: setvbuf can lead to invalid free/segfault
1415 [22432] build: Non-deterministic build
1416 [22439] malloc: malloc_info should compute summary statistics for all sub-
1418 [22442] network: if_nametoindex could report index for the wrong
1419 networking interface
1420 [22446] build: aliasing violation calling readlink in handle_request
1421 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1422 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1423 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1424 __nscd_hash/__nss_hash
1425 [22463] network: p_secstodate overflow handling
1426 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1427 [22478] libc: sigwait can fail with EINTR
1428 [22505] libc: ldconfig processes include directive in locale-specific
1430 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1431 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1432 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1433 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1434 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1435 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1436 same as for Croatian
1437 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1438 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1439 [22577] libc: missing newline after "cannot allocate TLS data structures
1441 [22588] manual: manual/conf.texi: missing underscore in front of
1443 [22593] math: nextafter and nexttoward are declared with const attribute
1444 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1445 [22603] string: ia64 memchr overflows internal pointer check
1446 [22605] libc: SH clone does not set the exit code correctly
1447 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1449 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1450 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1451 modified in case of success
1452 [22614] build: gcc: error: unrecognized command line option ā-no-pieā
1453 [22615] manual: manual: ambiguous wording about errno value in case of
1455 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1457 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1458 binaries or if /proc is not mounted (CVE-2017-16997)
1459 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1460 [22630] build: $(no-pie-ldflag) is no longer effective
1461 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1462 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1463 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1464 [22637] nptl: guard size is subtracted from thread stack size instead of
1466 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1467 [22657] localedata: hu_HU: Avoid double space in date
1468 [22660] math: fmax, fmin sNaN handling on alpha
1469 [22664] libc: New warning of GCC8
1470 [22665] math: alpha: ceil and floor raise inexact exceptions
1471 [22666] math: alpha: trunc raise inexact exceptions
1472 [22667] libc: makecontext lacks stack alignment on i386
1473 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1474 [22679] libc: getcwd(3) can succeed without returning an absolute path
1476 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1477 elision and tunables
1478 [22687] math: [powerpc-nofpu] complex long double functions spurious
1480 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1481 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1482 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1484 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1485 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1487 [22701] nis: Incomplete removal of libnsl
1488 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1489 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1490 [22715] dynamic-link: FAIL: elf/tst-audit10
1491 [22719] libc: Backtrace tests fail on hppa
1492 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1493 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1494 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1495 before the first call to crypt_r () in crypt/badsalttest.c
1502 * A per-thread cache has been added to malloc. Access to the cache requires
1503 no locks and therefore significantly accelerates the fast path to allocate
1504 and free small amounts of memory. Refilling an empty cache requires locking
1505 the underlying arena. Performance measurements show significant gains in a
1506 wide variety of user workloads. Workloads were captured using a special
1507 instrumented malloc and analyzed with a malloc simulator. Contributed by
1508 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1510 * Unicode 10.0.0 Support: Character encoding, character type info, and
1511 transliteration tables are all updated to Unicode 10.0.0, using
1512 generator scripts contributed by Mike FABIAN (Red Hat).
1513 These updates cause user visible changes, especially the changes in
1514 wcwidth for many emoji characters cause problems when emoji sequences
1515 are rendered with pango, see for example:
1516 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1518 * Collation of Hungarian has been overhauled and is now consistent with "The
1519 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1522 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1524 - The GNU C Library will now detect when /etc/resolv.conf has been
1525 modified and reload the changed configuration. The new resolver option
1526 āno-reloadā (RES_NORELOAD) disables this behavior.
1528 - The GNU C Library now supports an arbitrary number of search domains
1529 (configured using the āsearchā directive in /etc/resolv.conf);
1530 previously, there was a hard limit of six domains. For backward
1531 compatibility, applications that directly modify the ā_resā global
1532 object are still limited to six search domains.
1534 - When the ārotateā (RES_ROTATE) resolver option is active, the GNU C
1535 Library will now randomly pick a name server from the configuration as a
1536 starting point. (Previously, the second name server was always used.)
1538 * The tunables feature is now enabled by default. This allows users to tweak
1539 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1541 * New function reallocarray, which resizes an allocated block (like realloc)
1542 to the product of two sizes, with a guaranteed clean failure upon integer
1543 overflow in the multiplication. Originally from OpenBSD, contributed by
1544 Dennis Wƶlfing and RĆ¼diger Sonderfeld.
1546 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1547 These are extended versions of preadv and pwritev, respectively, taking an
1548 additional flags argument. The set of supported flags depends on the
1549 running kernel; full support currently requires kernel 4.7 or later.
1551 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1552 create a new session ID for the spawned process. This feature is
1553 scheduled to be added to the next major revision of POSIX; for the time
1554 being, it is available under _GNU_SOURCE.
1556 * errno.h is now safe to use from C-preprocessed assembly language on all
1557 supported operating systems. In this context, it will only define the
1558 Exxxx constants, as preprocessor macros expanding to integer literals.
1560 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1561 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1562 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1563 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1565 To compile programs that use this feature, the compiler must support
1566 128-bit floating point with the type name _Float128 (as defined by TS
1567 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1568 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1569 must be defined to make the new interfaces visible.
1571 The new functions and macros correspond to those present for other
1572 floating-point types (except for a few obsolescent interfaces not
1573 supported for the new type), with F128 or f128 suffixes; for example,
1574 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1575 printf or scanf formats for the new type; the strfromf128 and strtof128
1576 interfaces should be used instead.
1578 Deprecated and removed features, and other changes affecting compatibility:
1580 * The synchronization that pthread_spin_unlock performs has been changed to
1581 now be equivalent to a C11 atomic store with release memory order to the
1582 spin lock's memory location. Previously, several (but not all)
1583 architectures used stronger synchronization (e.g., containing what is
1584 often called a full barrier). This change can improve performance, but
1585 may affect odd fringe uses of spin locks that depend on the previous
1586 behavior (e.g., using spin locks as atomic variables to try to implement
1587 Dekker's mutual exclusion algorithm).
1589 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1592 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1593 will only be built and installed when the GNU C Library is configured with
1594 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1595 as TIRPC or rpcsvc-proto, to be used.
1597 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1598 libnss_compat, are deprecated, and will not be built or installed by
1601 The NIS(+) support library, libnsl, is also deprecated. By default, a
1602 compatibility shared library will be built and installed, but not headers
1603 or development libraries. Only a few NIS-related programs require this
1604 library. (In particular, the GNU C Library has never required programs
1605 that use 'gethostbyname' to be linked with libnsl.)
1607 Replacement implementations based on TIRPC, which additionally support
1608 IPv6, are available from <https://github.com/thkukuk/>. The configure
1609 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1610 name service modules, to be built and installed.
1612 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1613 support is enabled, the configured recursive resolver must support EDNS.
1614 (Responding to EDNS-enabled queries with responses which are not
1615 EDNS-enabled is fine, but FORMERR responses are not.)
1617 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1618 servers have not supported this opcode for a long time.
1620 * The _res_opcodes variable has been removed from libresolv. It had been
1621 exported by accident.
1623 * <string.h> no longer includes inline versions of any string functions,
1624 as this kind of optimization is better done by the compiler. The macros
1625 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1627 * The nonstandard header <xlocale.h> has been removed. Most programs should
1628 use <locale.h> instead. If you have a specific need for the definition of
1629 locale_t with no other declarations, please contact
1630 libc-alpha@sourceware.org and explain.
1632 * The obsolete header <sys/ultrasound.h> has been removed.
1634 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1636 * The obsolete function cfree has been removed. Applications should use
1639 * The stack_t type no longer has the name struct sigaltstack. This changes
1640 the C++ name mangling for interfaces involving this type.
1642 * The ucontext_t type no longer has the name struct ucontext. This changes
1643 the C++ name mangling for interfaces involving this type.
1645 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1646 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1647 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1648 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1649 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1650 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1651 fpregset_t type no longer has the name struct fpu. This changes the C++
1652 name mangling for interfaces involving those types.
1654 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1655 synced with the kernel:
1657 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1658 are not supported on this architecture and have been removed.
1660 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1661 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1662 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1664 Programs that assume the GET/SETREGS ptrace requests are universally
1665 available will now fail to build, instead of malfunctioning at runtime.
1667 Changes to build and runtime requirements:
1669 * Linux kernel 3.2 or later is required at runtime, on all architectures
1670 supported by that kernel. (This is a change from version 2.25 only for
1673 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1675 * On most architectures, GCC 4.9 or later is required to build the GNU C
1676 Library. On powerpc64le, GCC 6.2 or later is required.
1678 Older GCC versions and non-GNU compilers are still supported when
1679 compiling programs that use the GNU C Library. (We do not know exactly
1680 how old, and some GNU extensions to C may be _de facto_ required. If you
1681 are interested in helping us make this statement less vague, please
1682 contact libc-alpha@sourceware.org.)
1684 Security related changes:
1686 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1687 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1689 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1690 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1692 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1693 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1696 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1697 fixed (CVE-2017-12133).
1699 The following bugs are resolved with this release:
1701 [984] network: Respond to changed resolv.conf in gethostbyname
1702 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1703 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1705 [12189] libc: __stack_chk_fail should not attempt a backtrace
1707 [14096] time: Race condition on timezone/tst-timezone.out
1708 [14172] localedata: az_IR: new locale
1709 [14995] build: glibc fails to build if gold is the default linker, even if
1711 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1712 [16637] network: inet_pton function is accepting IPv6 with bad format
1713 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1714 x86 and other generic code
1715 [16875] localedata: ko_KR: fix lang_name
1716 [17225] localedata: ar_SY: localized month names for May and June are
1718 [17297] localedata: da_DK: wrong date_fmt string
1719 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1720 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1721 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1722 [19066] localedata: ar_SA abbreviated day and month names are in English
1723 [19569] network: resolv: Support an arbitrary number of search domains
1724 [19570] network: Implement random DNS server selection in the stub
1726 [19838] locale: localedef fails on PA-RISC
1727 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1728 order of 0D36 and 0D37
1729 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1731 [20098] libc: FAIL: debug/backtrace-tst on hppa
1732 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1734 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1736 [20313] localedata: Update locale data to Unicode 9.0
1737 [20424] manual: Document how to provide a malloc replacement
1738 [20496] localedata: agr_PE: new language locale AwajĆŗn / Aguaruna (agr)
1740 [20686] locale: Add el_GR@euro to SUPPORTED.
1741 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1742 failures consistently
1743 [21015] dynamic-link: Document and fix --enable-bind-now
1744 [21016] nptl: pthread_cond support is broken on hppa
1745 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1746 frame-pointer on i386
1747 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1749 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1750 [21088] libc: Build fails with --enable-static-nss
1751 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1752 generic c code is used
1753 [21109] libc: Tunables broken on big-endian
1754 [21112] math: powf has large ulp errors with base close to 1 and exponent
1756 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1758 [21120] malloc: glibc malloc is incompatible with GCC 7
1759 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1761 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1762 (-0.0) when linking with -lieee
1763 [21171] math: log10, log2 and lgamma return incorrect results
1764 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1765 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1766 [21207] localedata: ce_RU: update weekdays from CLDR
1767 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1768 [21217] localedata: Update months from CLDR-31
1769 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1770 [21243] libc: support_delete_temp_file should issue warning for failed
1772 [21244] libc: support resolv_test_start() socket fd close should be
1774 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1775 new posix_spawn implementation
1776 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1777 leads to lower CPU frequency
1778 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1779 [21261] libc: [sparc64] bits/setjmp.h namespace
1780 [21267] network: [mips] bits/socket.h IOC* namespace
1781 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1782 [21270] libc: mmap64 silently truncates large offset values
1783 [21275] libc: posix_spawn always crashes on ia64 now
1784 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1785 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1786 [21289] libc: Incorrect declaration for 32-bit platforms with
1787 _FILE_OFFSET_BITS=64 causes build error
1788 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1789 not support gethostbyname4_r
1790 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1792 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1794 [21340] libc: Support POSIX_SPAWN_SETSID
1795 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1796 [21359] network: ns_name_pack needs additional byte in destination buffer
1797 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1798 against fragmentation attacks (CVE-2017-12132)
1799 [21369] network: resolv: Remove EDNS fallback
1800 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1802 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1803 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1804 [21393] stdio: Missing dup3 error check in freopen, freopen64
1805 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1806 [21399] localedata: Bad description for U00EC in
1807 localedata/charmaps/CP1254
1808 [21411] malloc: realloc documentation error
1809 [21426] network: sys/socket.h uio.h namespace
1810 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1811 [21445] libc: signal.h bsd_signal namespace
1812 [21455] network: Network headers stdint.h namespace
1813 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1815 [21475] network: resolv: Overlong search path is truncated mid-label
1816 [21511] libc: sigstack namespace
1817 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1818 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1819 bits/syscall.h: No such file or directory
1820 [21517] libc: struct sigaltstack namespace
1821 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1822 [21533] localedata: Update locale data to Unicode 10.0
1824 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1825 junk at end of line, first unrecognized character is `@'
1826 [21538] libc: SIG_HOLD missing for XPG4
1827 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1828 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1829 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1830 [21543] libc: sigevent namespace
1831 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1832 size for general purpose registers in mcontext_t structure
1833 [21550] libc: sigwait namespace
1834 [21552] libc: XPG4 bsd_signal namespace
1835 [21554] libc: sigpause namespace
1836 [21560] libc: sys/wait.h signal.h namespace
1837 [21561] libc: waitid namespace
1838 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1839 '/usr/include/stdlib.h': Permission denied
1840 [21575] libc: sys/wait.h missing struct rusage definition
1841 [21584] libc: sigaltstack etc namespace
1842 [21597] libc: siginterrupt namespace
1843 [21607] math: hppa: FAIL: math/test-tgmath
1844 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1846 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1847 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1848 stack and heap (CVE-2017-1000366)
1849 [21625] libc: wait3 namespace
1850 [21654] nss: Incorrect pointer alignment in NSS group merge result
1852 [21657] network: Parse interface zone id for node-local multicast
1853 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1855 [21666] libc: .symver is used on common symbol
1856 [21668] network: resolv: res_init cross-thread broadcast introduces race
1858 [21687] math: tgmath.h totalorder, totalordermag return type
1859 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1861 [21696] libc: Incorrect assumption of of __cpu_mask in
1862 posix/sched_cpucount.c
1863 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1864 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1866 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1867 leading to relocation crash
1868 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1869 `resolv_conf_matches (resp, conf)' failed.
1870 [21710] localedata: Added Samoan language locale for Samoa
1871 [21711] localedata: Pashto yesstr/nostr locale are missing
1872 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1873 __have_pthread_attr_t can cause redefinition of typedef āpthread_attr_tā
1874 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1875 [21723] localedata: yesstr/nostr missing for Chinese language locale
1876 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1878 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1880 [21728] localedata: New Locale for Tongan language
1881 [21729] localedata: incorrect LC_NAME fields for hi_IN
1882 [21733] localedata: yesstr and nostr are missing for zh_HK
1883 [21734] localedata: Missing yesstr and nostr are for kw_GB
1884 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1885 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1886 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1887 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1889 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1891 [21749] localedata: Wrong abbreviated day name (āabdayā) for
1893 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1894 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1895 [21759] localedata: missing yesstr and nostr for Tigrinya
1896 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1897 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1898 [21767] localedata: Missing Bislama locales
1899 [21768] localedata: Missing yesstr and nostr for aa_ET
1900 [21770] localedata: Missing Field in li_NL
1901 [21778] nptl: Robust mutex may deadlock
1902 [21779] libc: MicroBlaze segfaults when loading libpthread
1903 [21783] localedata: Fix int_select international_call_prefixes
1904 [21784] localedata: Inconsistency in country_isbn
1905 [21788] localedata: Missing Country Postal Abbreviations
1906 [21794] localedata: Added-country_isbn-for-Italy
1907 [21795] localedata: Add/Fix country_isbn for France
1908 [21796] localedata: Added country_isbn for Republic of Korea
1909 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1910 [21799] localedata: Added int_select international_call_prefixes
1911 [21801] localedata: Added int_select international_call_prefixes
1912 [21804] nptl: Double semicolon in thread-shared-types.h
1913 [21807] localedata: LC_ADDRESS fix for pap_CW
1914 [21808] localedata: Fix LC_ADDRESS for pap_AW
1915 [21821] localedata: Added country_name in mai_IN
1916 [21822] localedata: Fix LC_TIME for mai_IN
1917 [21823] localedata: missing yesstr, nostr for sa_IN
1918 [21825] localedata: Fix name_mrs for mag_IN
1919 [21828] localedata: 2.26 changelog should mention user visible changes
1921 [21835] localedata: Added Maithili language locale for Nepal
1922 [21838] localedata: Removed redundant data for the_NP
1923 [21839] localedata: Fix LC_MONETARY for ta_LK
1924 [21844] localedata: Fix Latin characters and Months Sequence.
1925 [21848] localedata: Fix mai_NP Title Name
1930 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1931 24731-2:2010, is supported to enable declarations of functions from that
1932 TR. Note that not all functions from that TR are supported by the GNU C
1935 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1936 18661-1:2014, is supported to enable declarations of functions and macros
1937 from that TS. Note that not all features from that TS are supported by
1940 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1941 18661-4:2015, is supported to enable declarations of functions and macros
1942 from that TS. Note that most features from that TS are not supported by
1945 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1946 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1947 Since the GNU C Library defaults to a much newer revision of POSIX, this
1948 will only affect programs that specifically request an old conformance
1949 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1950 see a change in the visible declarations, but a program compiled with
1951 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1954 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1955 defined by all multithreaded code, but glibc has not required this for
1958 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1959 means that in a future release, the macros āmajorā, āminorā, and āmakedevā
1960 will only be available from <sys/sysmacros.h>.
1962 These macros are not part of POSIX nor XSI, and their names frequently
1963 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1964 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1965 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1968 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1969 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1970 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1972 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1973 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1974 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1975 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1976 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1977 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1978 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1979 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1980 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1981 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1982 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1985 * New <math.h> features are added from TS 18661-1:2014:
1987 - Signaling NaN macros: SNANF, SNAN, SNANL.
1989 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1990 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1991 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1993 - llogb functions: the llogb, llogbf and llogbl functions, and the
1994 FP_LLOGB0 and FP_LLOGBNAN macros.
1996 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1999 - Comparison macros: iseqsig.
2001 - Classification macros: iscanonical, issubnormal, iszero.
2003 - Total order functions: totalorder, totalorderf, totalorderl,
2004 totalordermag, totalordermagf, totalordermagl.
2006 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2008 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2009 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2011 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2012 are added to libc. They convert a floating-point number into string.
2014 * Most of glibc can now be built with the stack smashing protector enabled.
2015 It is recommended to build glibc with --enable-stack-protector=strong.
2016 Implemented by Nick Alcock (Oracle).
2018 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2019 intended to be used instead of memset() to erase sensitive data after use;
2020 the compiler will not optimize out calls to explicit_bzero even if they
2021 are "unnecessary" (in the sense that no _correct_ program can observe the
2022 effects of the memory clear).
2024 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2025 to float instead of double. This does not affect the ABI of any libraries
2026 that are part of the GNU C Library, but may affect the ABI of other
2027 libraries that use this type in their interfaces.
2029 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2030 float_t and double_t types are now defined to long double instead of float
2031 and double. These options are not the default, and this does not affect
2032 the ABI of any libraries that are part of the GNU C Library, but it may
2033 affect the ABI of other libraries that use this type in their interfaces,
2034 if they are compiled or used with those options.
2036 * The getentropy and getrandom functions, and the <sys/random.h> header file
2039 * The buffer size for byte-oriented stdio streams is now limited to 8192
2040 bytes by default. Previously, on Linux, the default buffer size on most
2041 file systems was 4096 bytes (and thus remains unchanged), except on
2042 network file systems, where the buffer size was unpredictable and could be
2043 as large as several megabytes.
2045 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2046 for the Linux quota interface which predates kernel version 2.4.22 has
2049 * The malloc_get_state and malloc_set_state functions have been removed.
2050 Already-existing binaries that dynamically link to these functions will
2051 get a hidden implementation in which malloc_get_state is a stub. As far
2052 as we know, these functions are used only by GNU Emacs and this change
2053 will not adversely affect already-built Emacs executables. Any undumped
2054 Emacs executables, which normally exist only during an Emacs build, should
2055 be rebuilt by re-running ā./configure; makeā in the Emacs build tree.
2057 * The āip6-dotintā and āno-ip6-dotintā resolver options, and the
2058 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2059 āno-ip6-dotintā had already been the default, and support for the
2060 āip6-dotintā option was removed from the Internet in 2006.
2062 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2063 flag from <resolv.h> have been removed. The option relied on a
2064 backwards-incompatible DNS extension which was never deployed on the
2067 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2068 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2069 They were already unimplemented.
2071 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2072 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2073 removed again from the IETF name lookup interface specification in RFC
2074 2553. Applications should use getaddrinfo instead.
2076 * DNSSEC-related declarations and definitions have been removed from the
2077 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2078 decode the data part of DNSSEC record types. Previous versions of glibc
2079 only implemented minimal support for the previous version of DNSSEC, which
2080 is incompatible with the currently deployed version.
2082 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2083 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2084 <arpa/nameser.h> header file because the distinction between RR types and
2085 meta-RR types is not officially standardized, subject to revision, and
2086 thus not suitable for encoding in a macro.
2088 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2089 and rhook members of the res_state type in <resolv.h> have been removed.
2090 The glibc stub resolver did not support these hooks, but the header file
2091 did not reflect that.
2093 * For multi-arch support it is recommended to use a GCC which has
2094 been built with support for GNU indirect functions. This ensures
2095 that correct debugging information is generated for functions
2096 selected by IFUNC resolvers. This support can either be enabled by
2097 configuring GCC with '--enable-gnu-indirect-function', or by
2098 enabling it by default by setting 'default_gnu_indirect_function'
2099 variable for a particular architecture in the GCC source file
2102 * GDB pretty printers have been added for mutex and condition variable
2103 structures in POSIX Threads. When installed and loaded in gdb these pretty
2104 printers show various pthread variables in human-readable form when read
2105 using the 'print' or 'display' commands in gdb.
2107 * Tunables feature added to allow tweaking of the runtime for an application
2108 program. This feature can be enabled with the '--enable-tunables' configure
2109 flag. The GNU C Library manual has details on usage and README.tunables has
2110 instructions on adding new tunables to the library.
2112 * A new version of condition variables functions have been implemented in
2113 the NPTL implementation of POSIX Threads to provide stronger ordering
2116 * A new version of pthread_rwlock functions have been implemented to use a more
2117 scalable algorithm primarily through not using a critical section anymore to
2120 Security related changes:
2122 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2123 have been created with makecontext could fail to terminate due to a
2124 missing .cantunwind annotation. This has been observed to lead to a hang
2125 (denial of service) in some Go applications compiled with gccgo. Reported
2126 by Andreas Schwab. (CVE-2016-6323)
2128 * The DNS stub resolver functions would crash due to a NULL pointer
2129 dereference when processing a query with a valid DNS question type which
2130 was used internally in the implementation. The stub resolver now uses a
2131 question type which is outside the range of valid question type values.
2134 The following bugs are resolved with this release:
2136 [4099] stdio: Overly agressive caching by stream i/o functions.
2137 [7065] build: Support building glibc with -fstack-protector or -fstack-
2139 [9842] localedata: en_CA: incorrect date format
2140 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2141 before it started waiting
2142 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2143 [15765] nptl: sem_open is wrongly a cancellation point
2144 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2145 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2147 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2148 library linked with pthread
2149 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2150 "FIXME: Ingo" issue)
2151 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2152 [17252] libc: getrandom and getentropy syscall
2153 [17730] malloc: thread-local storage is sometimes improperly free()'d
2154 after being __libc_memalign()'d
2155 [18241] stdio: failed fseek on memstream does not set errno and can fail
2157 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2159 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2160 PTHREAD_PRIO_INHERIT mutex on ARM
2161 [18784] network: res_query and related function crash for special record
2162 type queries (CVE-2015-5180)
2163 [19380] math: strtod does not raise "inexact"
2164 [19387] string: Integer overflow in memchr
2165 [19390] string: Integer overflow in strncat
2166 [19398] build: linknamespace tests fail with massively parallel build
2167 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2169 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2170 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2171 [19514] libc: [PATCH] Fix spelling errors in spelling
2172 "implement"/"implementation" in several places
2173 [19582] network: Deprecate RES_USE_INET6
2174 [19673] manual: clog10 docs appear to be erroneous
2175 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2176 causes a segmentation fault
2177 [19826] libc: invalid pointer returned from __tls_get_addr with static
2179 [20016] network: resolv: Remove hooks support from the API
2180 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2182 [20033] math: [x86_64] vectorized math function don't call the __finite
2184 [20116] nptl: use after free in pthread_create
2185 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2186 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2188 [20311] nptl: please install proc_service.h
2189 [20366] libc: Compilation errors in installed headers in strict-compliance
2191 [20370] malloc: malloc: Arena free list management is still racy
2192 (incorrect fix in bug 19243)
2193 [20386] libc: assert (X = 0) does not result in GCC warning
2194 [20432] malloc: malloc: Minimize interface required for interposition
2195 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2196 in _Unwind_Backtrace (CVE-2016-6323)
2197 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2198 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2200 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2201 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2202 [20477] network: resolv: incorrect double-checked locking related to
2204 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2206 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2208 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2209 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2210 cause transition penalty
2211 [20517] math: sparcv9 missing fdiml compat symbol
2212 [20524] manual: strverscmp is inconsistent
2213 [20525] libc: <sys/quota.h> should be based on kernel headers
2214 [20539] math: GCC 7 -static -lm fails to link at -O3
2215 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2217 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2219 [20591] network: Remove obsolete DNSSEC support
2220 [20592] network: DNS resource record type classification macros in
2221 <arpa/nameser.h> are incorrect
2222 [20593] network: Update DNS RR type definitions
2223 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2224 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2226 [20629] network: libresolv: Remove support for bitstring labels
2228 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2229 assertion: "maxidx >= 2"
2230 [20660] math: [arm] Use VSQRT
2231 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2232 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2233 [20689] libc: Test for FMA should also check for AVX.
2234 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2235 [20715] math: iszero macro breaks existing code
2236 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2237 [20728] libc: powerpc: Missing TOC stub in clone
2238 [20729] build: glibc-2.24 fails to build for i486 with -Os
2239 [20750] build: Build fails with default PIE enabled gcc-6.x
2240 [20768] math: [alpha] sqrt fegetenv namespace
2241 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2243 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2244 __FLT_EVAL_METHOD__ is 2
2245 [20790] network: rpcgen buffer overrun in get_prog_declaration
2246 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2247 [20829] libc: crypt snprintf namespace
2248 [20847] libc: tst-vfork3 failure
2249 [20855] math: Default bits/mathdef.h has inappropriate float_t
2250 [20859] math: [sh4] FP_ILOGB0 invalid
2251 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2252 U+20AC), not same as GBK
2253 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2254 [20916] math: pow handling of sNaN arguments
2255 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2256 [20919] math: Bad pow (qNaN, 0) result with -lieee
2257 [20940] math: hypot sNaN handling
2258 [20947] math: fmax, fmin sNaN handling
2259 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2260 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2262 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2263 [20973] nptl: robust mutexes: Lost wake-ups
2264 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2265 [20978] nis: strlen on null pointer in nss_nisplus
2266 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2268 [21014] string: i686 memchr overflows internal pointer check
2269 [21019] libc: [mips] n32 lseek incorrect on overflow
2270 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2271 [21026] libc: [MIPS] readahead syscall is broken on n64
2272 [21028] math: Fallback fesetexceptflag should always succeed
2273 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2274 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2276 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2277 [21061] librt: [microblaze] librt lost clock_* exports
2278 [21073] libc: tunables: insecure environment variables passed to
2279 subprocesses with AT_SECURE
2280 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2284 * The minimum Linux kernel version that this version of the GNU C Library
2285 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2286 kernel version 2.6.32 or later suffices (on architectures that already
2287 required kernel versions more recent than 3.2, those requirements remain
2288 unchanged). Linux 3.2 or later kernel headers are required on all
2291 * The pap_AN locale has been deleted. This has been deprecated for a long
2292 time. It has been replaced by pap_AW & pap_CW, both of which have long
2293 been included in previous releases.
2295 * The readdir_r and readdir64_r functions have been deprecated. It is
2296 recommended to use readdir and readdir64 instead.
2298 * The type āunion waitā has been removed. It was deprecated in the early
2299 1990s and never part of POSIX. Application code should use the int type
2300 instead of āunion waitā.
2302 * A new NSS action is added to facilitate large distributed system
2303 administration. The action, MERGE, allows remote user stores like LDAP
2304 to be merged into local user stores like /etc/groups in order to provide
2305 easy to use, updated, and managed sets of merged credentials. The new
2306 action can be used by configuring it in /etc/nsswitch.conf:
2307 group: files [SUCCESS=merge] nis
2308 Implemented by Stephen Gallagher (Red Hat).
2310 * The deprecated __malloc_initialize_hook variable has been removed from the
2313 * The long unused localedef --old-style option has been removed. It hasn't
2314 done anything in over 16 years. Scripts using this option can safely
2317 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2318 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2319 return the next representable value in the direction of positive infinity
2320 and the nextdown functions return the next representable value in the
2321 direction of negative infinity. These are currently enabled as GNU
2324 Security related changes:
2326 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2327 could result in a stack overflow when getnetbyname was called with an
2328 overly long name. (CVE-2016-3075)
2330 * Previously, getaddrinfo copied large amounts of address data to the stack,
2331 even after the fix for CVE-2013-4458 has been applied, potentially
2332 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2333 instead. Reported by Michael Petlan. (CVE-2016-3706)
2335 * The glob function suffered from a stack-based buffer overflow when it was
2336 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2337 Reported by Alexander Cherepanov. (CVE-2016-1234)
2339 * The Sun RPC UDP client could exhaust all available stack space when
2340 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2341 alloca plugin for GCC. (CVE-2016-4429)
2343 * The IPv6 name server management code in libresolv could result in a memory
2344 leak for each thread which is created, performs a failing naming lookup,
2345 and exits. Over time, this could result in a denial of service due to
2346 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2348 The following bugs are resolved with this release:
2350 [1170] localedata: ne_NP: update Nepali locale definition file
2351 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2353 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2354 [6796] math: fdim() does not set errno on overflow
2355 [10354] libc: posix_spawn should use vfork() in more cases than presently
2356 [11213] localedata: localedata: add copyright disclaimer to locale files
2357 [12143] localedata: chr_US: new Cherokee locale
2358 [12450] localedata: sgs_LT: new locale
2359 [12676] localedata: ln_CD: new locale
2360 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2362 [13304] math: fma, fmaf, fmal produce wrong results
2363 [14259] build: --localedir arg to configure is ignored
2364 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2365 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2366 [14934] localedata: es_CL: wrong first weekday chilean locale
2367 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2369 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2371 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2372 [15368] nptl: raise() is not async-signal-safe
2373 [15479] math: ceil, floor, round and trunc raise inexact exception
2374 [15578] localedata: kk_KZ: various updates
2375 [16003] localedata: pap_AN: punt old locale
2376 [16137] localedata: iw_IL: punt old locale
2377 [16190] localedata: eo: new esperanto locale
2378 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2379 [16742] malloc: race condition: pthread_atfork() called before first
2380 malloc() results in unexpected locking behaviour/deadlocks
2381 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2383 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2384 [17565] localedata: pt_PT: wrong (work-)week start
2385 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2386 [17950] build: Build fails with -msse
2387 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2388 [18433] libc: posix_spawn does not return correctly upon failure to
2390 [18453] localedata: charmaps/IBM875: incorrect codes
2391 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2393 [18896] localedata: he_IL: improvements for currency
2394 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2395 Romanian locale data
2396 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2398 [19056] libc: Deprecate readdir_r
2399 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2401 [19198] localedata: nl_NL: small improvements for Dutch locales
2402 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2403 nameservers (CVE-2016-5417)
2404 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2406 [19400] locale: Language missing in "iso-639.def", trivial fix in
2408 [19431] malloc: Deadlock between fflush, getdelim, and fork
2409 [19505] libc: Incorrect file descriptor validity checks in
2410 posix_spawn_file_actions_add{open,close,dup2}
2411 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2412 when using RTLD_NEXT
2413 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2414 `intl/{gettextP,loadinfo}.h'
2415 [19534] libc: execle, execlp may use malloc
2416 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2417 [19573] network: res_nclose and __res_maybe_init disagree about name
2418 server initialization, breaking Hesiod
2419 [19575] localedata: Status of GB18030 tables
2420 [19581] localedata: sr_* date_fmt string contains additional newline
2421 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2423 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2424 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2425 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2426 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2428 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2430 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2432 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2433 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2434 [19633] locale: strfmon_l applies global locale to number formatting
2435 [19642] network: Memory leak in getnameinfo
2436 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2437 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2439 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2440 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2442 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2443 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2445 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2447 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2449 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2450 pointers and lengths in error-case.
2451 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2452 report errors on UTF-16 surrogates values.
2453 [19755] nscd: nscd assertion failure in gc
2454 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2455 [19759] libc: mempcpy shouldn't be inlined
2456 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2457 [19765] libc: s390 needs an optimized mempcpy
2458 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2459 NAME_MAX limit assumption (CVE-2016-1234)
2460 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2461 [19787] network: Missing and incorrect truncation checks in getnameinfo
2462 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2464 [19791] network: Assertion failure in res_query.c with un-connectable name
2466 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2467 [19822] math: libm.so install clobbers old version
2468 [19825] network: resolv: send_vc can return uninitialized data in second
2469 response to getaddrinfo
2470 [19830] network: nss_dns: should check RDATA length against buffer length
2471 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2472 confronted with A/AAAA records of invalid size
2473 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2474 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2475 [19853] stdio: Printing IBM long double in decimal with high precision is
2477 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2478 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2479 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2481 [19865] network: Assertion failure or memory leak in
2482 _nss_dns_getcanonname_r
2483 [19868] network: nss_dns: netent code does not skip over non-PTR records
2484 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2486 [19881] string: Improve x86-64 memset
2487 [19907] string: Incorrect memcpy tests
2488 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2490 [19925] libc: termios.h XCASE namespace
2491 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2492 [19929] libc: limits.h NL_NMAX namespace
2493 [19931] stdio: Memory leak in vfprintf
2494 [19957] libc: clone(CLONE_VM) access invalid parent memory
2495 [19963] localedata: en_IL: New locale
2496 [19989] stdio: stdio.h cuserid namespace
2497 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2499 [19996] locale: langinfo.h nl_langinfo_l namespace
2500 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2501 [20010] network: getaddrinfo: Stack overflow in hostent translation
2503 [20012] stdio: libio: fmemopen append mode failure
2504 [20014] stdio: stdio.h namespace for pre-threads POSIX
2505 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2506 [20023] libc: fcntl.h timespec namespace
2507 [20024] math: [x86_64] vectorized sincos trashes the stack
2508 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2509 [20041] time: sys/time.h timespec namespace
2510 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2511 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2512 [20051] libc: ttyslot in wrong header under wrong conditions
2513 [20054] libc: gethostname not declared for XPG4
2514 [20055] libc: termios.h missing tcgetsid for XPG4
2515 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2517 [20073] libc: sys/stat.h fchmod namespace
2518 [20074] libc: stdlib.h rand_r namespace
2519 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2520 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2522 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2523 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2525 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2526 [20119] libc: Wrong mask for processors level type from CPUID
2527 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2528 AS not supporting AVX512
2529 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2531 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2532 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2534 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2535 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2536 [20178] libc: posix_spawn{p} should not call exit
2537 [20191] stdio: libio: vtables hardening
2538 [20195] string: FMA4 detection requires CPUID execution with register
2540 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2541 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2543 [20212] math: acos (sNaN) returns sNaN
2544 [20213] math: asin (sNaN) returns sNaN
2545 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2546 [20218] math: [i386] asinhl (sNaN) returns sNaN
2547 [20219] math: [i386] atanhl (sNaN) returns sNaN
2548 [20222] stdio: fopencookie: Mangle function pointers
2549 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2550 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2551 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2553 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2554 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2555 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2556 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2557 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2558 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2559 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2560 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2561 [20240] math: modf (sNaN) returns sNaN
2562 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2563 [20250] math: frexp (sNaN) returns sNaN
2564 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2565 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2567 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2568 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2569 subscript is below array bounds [-Werror=array-bounds]
2570 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2571 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2573 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2574 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2576 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2577 "invalid" exceptions
2578 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2579 [20316] localedata: id_ID: Februari instead of Pebruari
2580 [20327] string: POWER8 strcasecmp returns incorrect result
2581 [20347] math: Failure: Test: j0_downward (0xap+0)
2582 [20348] libc: FAIL: misc/tst-preadvwritev64
2583 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2584 [20350] libc: There is no test for p{read,write}64
2585 [20357] math: Incorrect cos result for 1.5174239687223976
2586 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2590 * Unicode 8.0.0 Support: Character encoding, character type info, and
2591 transliteration tables are all updated to Unicode 8.0.0, using new
2592 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2593 These updates cause user visible changes, such as the fixes for bugs
2594 89, 16061, and 18568.
2596 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2597 kernel-internal CPU set size. This means that requests that change the
2598 CPU affinity which failed before (for example, an all-ones CPU mask) will
2599 now succeed. Applications that need to determine the effective CPU
2600 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2601 setting it because the kernel can adjust it (and the previous size check
2602 would not detect this in the majority of cases).
2604 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2605 the following new symbols are used: fts64_children, fts64_close,
2606 fts64_open, fts64_read and fts64_set.
2608 * getaddrinfo now detects certain invalid responses on an internal netlink
2609 socket. If such responses are received, an affected process will
2610 terminate with an error message of "Unexpected error <number> on netlink
2611 descriptor <number>" or "Unexpected netlink response of size <number> on
2612 descriptor <number>". The most likely cause for these errors is a
2613 multi-threaded application which erroneously closes and reuses the netlink
2614 file descriptor while it is used by getaddrinfo.
2616 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2617 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2618 unnecessary serialization of memory allocation requests across threads.
2619 The defect is now corrected. Users should see a substantial increase in
2620 the concurent throughput of allocation requests for applications which
2621 trigger this bug. Affected applications typically create and
2622 destroy threads frequently. (Bug 19048 was reported and analyzed by
2625 * There is now a --disable-timezone-tools configure option for disabling the
2626 building and installing of the timezone related utilities (zic, zdump, and
2627 tzselect). This is useful for people who build the timezone data and code
2628 independent of the GNU C Library.
2630 * The obsolete header <regexp.h> has been removed. Programs that require
2631 this header must be updated to use <regex.h> instead.
2633 * The obsolete functions bdflush, create_module, get_kernel_syms,
2634 query_module and uselib are no longer available to newly linked binaries;
2635 the header <sys/kdaemon.h> has been removed. These functions and header
2636 were specific to systems using the Linux kernel and could not usefully be
2637 used with the GNU C Library on systems with version 2.6 or later of the
2640 * Optimized string, wcsmbs and memory functions for IBM z13.
2641 Implemented by Stefan Liebler.
2643 * Newly linked programs that define a variable called signgam will no longer
2644 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2645 require signgam to be set by those functions must ensure that they use the
2646 variable provided by the GNU C Library and declared in <math.h>, without
2647 defining their own copy.
2649 * The minimum GCC version that can be used to build this version of the GNU
2650 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2651 still be used to compile programs using the GNU C Library.
2653 Security related changes:
2655 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2656 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2658 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2659 the pointer guard feature. It is always enabled. Previously,
2660 LD_POINTER_GUARD could be used to disable security hardening in binaries
2661 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2664 * An integer overflow in hcreate and hcreate_r could lead to an
2665 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2667 * The catopen function no longer has unbounded stack usage. Reported by
2668 Max. (CVE-2015-8779)
2670 * The nan, nanf and nanl functions no longer have unbounded stack usage
2671 depending on the length of the string passed as an argument to the
2672 functions. Reported by Joseph Myers. (CVE-2014-9761)
2674 * A stack-based buffer overflow was found in libresolv when invoked from
2675 libnss_dns, allowing specially crafted DNS responses to seize control
2676 of execution flow in the DNS client. The buffer overflow occurs in
2677 the functions send_dg (send datagram) and send_vc (send TCP) for the
2678 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2679 family. The use of AF_UNSPEC triggers the low-level resolver code to
2680 send out two parallel queries for A and AAAA. A mismanagement of the
2681 buffers used for those queries could result in the response of a query
2682 writing beyond the alloca allocated buffer created by
2683 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2684 the overflow. Thanks to the Google Security Team and Red Hat for
2685 reporting the security impact of this issue, and Robert Holiday of
2686 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2688 The following bugs are resolved with this release:
2690 [89] localedata: Locales nb_NO and nn_NO should transliterate ƦĆøĆ„
2691 [887] math: Math library function "logb" and "nextafter" inconsistent
2692 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2693 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2694 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2695 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2697 [4404] localedata: German translation of "Alarm clock" is misleading
2698 [6799] math: nextafter() and nexttoward() doen't set errno on
2699 overflow/underflow errors
2700 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2702 [10432] nis: _nss_nis_setnetgrent assertion failure
2703 [11460] libc: fts has no LFS support
2704 [12926] network: getaddrinfo()/make_request() may spin forever
2705 [13065] nptl: Race condition in pthread barriers
2706 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2707 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2709 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2710 [14912] libc: Rename non-installed bits/*.h headers
2711 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2712 [15367] math: Let gcc use __builtin_isinf
2713 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2714 [15421] math: lgamma wrongly sets signgam for ISO C
2715 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2716 FE_INVALID with argument out of range
2717 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2719 [15786] dynamic-link: ifunc resolver functions can smash function
2721 [15918] math: Unnecessary check for equality in hypotf()
2722 [16061] localedata: Review / update transliteration data
2723 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2725 [16141] time: strptime %z offset restriction
2726 [16171] math: drem should be alias of remainder
2727 [16296] math: fegetround is pure?
2728 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2729 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2731 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2732 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2734 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2735 "Exception "Inexact" set" on ppc32
2736 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2737 [16517] math: Missing underflow exception from tanf/tan/tanl
2738 [16519] math: Missing underflow exception from sinhf
2739 [16520] math: Missing underflow exception from tanhf
2740 [16521] math: Missing underflow exception from exp2
2741 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2743 [16734] stdio: fopen calls mmap to allocate its buffer
2744 [16961] math: nan function incorrect handling of bad sequences
2745 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2746 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2747 [16985] locale: localedef: confusing error message when opening output
2749 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2750 [17197] locale: Redundant shift character in iconv conversion output at
2752 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2753 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2754 [17250] dynamic-link: static linking breaks nss loading
2755 (getaddrinfo/getpwnam/etc...)
2756 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2758 [17441] math: isnan() should use __builtin_isnan() in GCC
2759 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2760 (related to lock elision)
2761 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2762 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2763 [17887] time: strptime should be able to parse "+01:00" style timezones
2764 [17905] libc: catopen() Multiple unbounded stack allocations
2766 [18084] libc: backtrace (..., 0) dumps core on x86
2767 [18086] libc: nice() sets errno to 0 on success
2768 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2769 is too large (CVE-2015-8778)
2770 [18251] dynamic-link: SONAME missing when audit modules provides path
2771 [18265] libc: add attributes for wchar string and memory functions
2772 [18370] math: csqrt missing underflows
2773 [18421] libc: [hppa] read-only segment has dynamic relocations
2774 [18472] libc: Obsolete syscall wrappers should be compat symbols
2775 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2776 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2777 [18525] localedata: Remove locale timezone information
2778 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2779 [18568] localedata: Update locale data to Unicode 8.0
2780 [18589] locale: sort-test.sh fails at random
2781 [18595] math: ctan, ctanh missing underflows
2782 [18604] libc: assert macro-expands its argument
2783 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2784 contains a vector instruction exception.
2785 [18611] math: j1, jn missing errno setting on underflow
2786 [18618] localedata: sync Chechen locale definitions with other *_RU
2788 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2789 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2790 [18665] network: In send_dg, the recvfrom function is NOT always using the
2791 buffer size of a newly created buffer (CVE-2015-7547)
2792 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2794 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2796 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2797 [18699] math: tilegx cproj() for various complex infinities does not yield
2799 [18724] libc: Harden put*ent functions against data injection
2800 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2801 [18755] build: build errors with -DNDEBUG
2802 [18757] stdio: fmemopen fails to set errno on failure
2803 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2805 [18781] libc: openat64 lacks O_LARGEFILE
2806 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2807 error: canāt find a register in class āR1_REGSā while reloading āasmā
2808 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2809 [18790] math: [ldbl-128ibm] tanhl inaccurate
2810 [18795] libc: stpncpy fortification misses buffer lengths that are
2811 statically too large
2812 [18796] build: build fails for --disable-mathvec
2813 [18803] math: hypot missing underflows
2814 [18820] stdio: fmemopen may leak memory on failure
2815 [18823] math: csqrt spurious underflows
2816 [18824] math: fma spurious underflows
2817 [18825] math: pow missing underflows
2818 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2819 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2820 [18870] build: sem_open.c fails to compile with missing symbol
2822 [18872] stdio: Fix memory leak in printf_positional
2823 [18873] libc: posix_fallocate overflow check ineffective
2824 [18875] math: Excess precision leads incorrect libm
2825 [18877] libc: arm: mmap offset regression
2826 [18887] libc: memory corruption when using getmntent on blank lines
2827 [18918] localedata: hu_HU: change time to HH:MM:SS format
2828 [18921] libc: Regression: extraneous stat() and fstat() performed by
2830 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2831 binaries (CVE-2015-8777)
2832 [18951] math: tgamma missing underflows
2833 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2835 [18953] localedata: lt_LT: change currency symbol to the euro
2836 [18956] math: powf inaccuracy
2837 [18961] math: [i386] exp missing underflows
2838 [18966] math: [i386] exp10 missing underflows
2839 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2840 [18969] build: multiple string test failures due to missing locale
2842 [18970] libc: Reference of pthread_setcancelstate in libc.a
2843 [18977] math: float / long double Bessel functions not in XSI POSIX
2844 [18980] math: i386 libm functions return with excess range and precision
2845 [18981] math: i386 scalb*, ldexp return with excess range and precision
2846 [18982] stdio: va_list and vprintf
2847 [18985] time: Passing out of range data to strftime() causes a segfault
2849 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2850 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2851 [19012] locale: iconv_open leaks memory on error path
2852 [19016] math: clog, clog10 inaccuracy
2853 [19018] nptl: Mangle function pointers in tls_dtor_list
2854 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2855 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2856 [19048] malloc: malloc: arena free list can become cyclic, increasing
2858 [19049] math: [powerpc] erfc incorrect zero sign
2859 [19050] math: [powerpc] log* incorrect zero sign
2860 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2861 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2862 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2863 [19074] network: Data race in _res_hconf_reorder_addrs
2864 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2865 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2866 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2868 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2870 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2871 [19086] manual: posix_fallocate64 documented argument order is wrong.
2872 [19088] math: lround, llround missing exceptions close to overflow
2874 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2875 [19095] math: dbl-64 lrint incorrect for 64-bit long
2876 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2877 [19124] dynamic-link: ld.so failed to build with older assmebler
2878 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2879 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2880 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2881 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2882 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2883 pthread_setaffinity_np
2884 [19156] math: [ldbl-128] j0l spurious underflows
2885 [19164] nptl: tst-getcpu fails with many possible CPUs
2886 [19168] math: math/test-ildoubl and math/test-ldouble failure
2887 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2888 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2890 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2891 (FE_NOMASK_ENV) do not clear SSE exceptions
2892 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2893 _int_new_arena/reused_arena
2894 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2895 [19201] math: dbl-64 remainder incorrect sign of zero result
2896 [19205] math: bits/math-finite.h conditions do not match math.h and
2898 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2899 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2900 for C99-based standards
2901 [19212] libc: features.h not -Wundef clean
2902 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2904 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2905 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2906 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2908 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2909 "inexact" exceptions
2910 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2912 [19242] libc: strtol incorrect in Turkish locales
2913 [19243] malloc: reused_arena can pick an arena on the free list, leading
2914 to an assertion failure and reference count corruption
2915 [19253] time: tzset() ineffective when temporary TZ did not include DST
2917 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2918 [19270] math: [hppa] Shared libm missing __isnanl
2919 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2920 MAP_HUGETLB and MAP_STACK defines
2921 [19313] nptl: Wrong __cpu_mask for x32
2922 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2923 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2924 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2925 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2926 [19363] time: x32: times() return value wrongly truncates/sign extends
2928 [19367] dynamic-link: Improve branch prediction on Silvermont
2929 [19369] network: Default domain name not reset by res_ninit when "search"
2930 / "domain" entry is removed from resolv.conf
2931 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2933 [19385] localedata: bg_BG: time separator should be colon, not comma
2934 [19408] libc: linux personality syscall wrapper may erroneously return an
2935 error on 32-bit architectures
2936 [19415] libc: dladdr returns wrong names on hppa
2937 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2938 IBM905, IBM907, and IBM909
2939 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2940 [19443] build: build failures with -DDEBUG
2941 [19451] build: Make check fails on test-double-vlen2
2942 [19462] libc: Glibc failed to build with -Os
2943 [19465] math: Wrong code with -Os
2944 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2946 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2948 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2949 [19486] math: S390: Math tests fail with "Exception Inexact set".
2950 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2951 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2953 [19590] math: Fail to build shared objects that use libmvec.so functions.
2957 * The following bugs are resolved with this release:
2959 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2960 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2961 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2962 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2963 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2964 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2965 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2966 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2967 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2968 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2969 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2970 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2971 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2972 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2973 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2974 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2975 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2976 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2977 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2978 18657, 18676, 18694, 18696, 18887.
2980 * Cache information can be queried via sysconf() function on s390 e.g. with
2981 _SC_LEVEL1_ICACHE_SIZE as argument.
2983 * A buffer overflow in gethostbyname_r and related functions performing DNS
2984 requests has been fixed. If the NSS functions were called with a
2985 misaligned buffer, the buffer length change due to pointer alignment was
2986 not taken into account. This could result in application crashes or,
2987 potentially arbitrary code execution, using crafted, but syntactically
2988 valid DNS responses. (CVE-2015-1781)
2990 * The time zone file parser has been made more robust against crafted time
2991 zone files, avoiding heap buffer overflows related to the processing of
2992 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2993 large time zone data files. Overly long time zone specifiers in the TZ
2994 variable no longer result in stack overflows and crashes.
2996 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2997 for LD and GD on x86 and x86-64, has been implemented. You will need
2998 binutils-2.24 or later to enable this optimization.
3000 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3001 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3002 Hat). These updates cause user visible changes, such as the fix for bug
3005 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3006 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3007 condition in some applications.
3009 * Added vector math library named libmvec with the following vectorized x86_64
3010 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3012 The library can be disabled with --disable-mathvec. Use of the functions is
3013 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3014 Shared library libmvec.so is linked in as needed when using -lm (no need to
3015 specify -lmvec explicitly for not static builds).
3016 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3018 * A new fmemopen implementation has been added with the goal of POSIX
3019 compliance. The new implementation fixes the following long-standing
3020 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3021 old implementation is still present for use be by existing binaries.
3023 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3024 releases. It has been fixed to match 2.19 and older, but binaries built
3025 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3027 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3028 Contributed by Roland McGrath (Google).
3030 * The header <regexp.h> is deprecated, and will be removed in a future
3031 release. Use of this header will trigger a deprecation warning.
3032 Application developers should update their code to use <regex.h> instead.
3034 This header was formerly part of SUS, but was deprecated in 1994 and
3035 removed from the standard in 2001. Also, the glibc implementation
3036 leaks memory. See BZ#18681 for more details.
3040 * The following bugs are resolved with this release:
3042 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3043 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3044 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3045 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3046 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3047 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3048 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3049 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3050 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3051 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3054 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3055 too little memory for the to-be-scanned arguments and overflow the
3056 allocated buffer. The implementation now correctly computes the required
3057 buffer size when using malloc, and switches to malloc from alloca as
3060 * A new semaphore algorithm has been implemented in generic C code for all
3061 machines. Previous custom assembly implementations of semaphore were
3062 difficult to reason about or ensure that they were safe. The new version
3063 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3064 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3065 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3067 * Port to Altera Nios II has been contributed by Mentor Graphics.
3069 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3070 implementations for powerpc64/powerpc64le.
3071 Implemented by Adhemerval Zanella (IBM).
3073 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3074 and powerpc64le. This may improve lock scaling of existing programs on
3075 HTM capable systems. The lock elision code is only enabled with
3076 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3077 powerpc will issue a transaction abort on every syscall to avoid side
3078 effects being visible outside transactions.
3080 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3081 AArch64. Contributed by ARM Ltd.
3083 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3085 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3086 under certain input conditions resulting in the execution of a shell for
3087 command substitution when the application did not request it. The
3088 implementation now checks WRDE_NOCMD immediately before executing the
3089 shell and returns the error WRDE_CMDSUB as expected.
3091 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3092 processing format strings with a large number of format specifiers.
3094 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3095 infinite loop if the DNS response contained a PTR record of an unexpected
3098 * The minimum GCC version that can be used to build this version of the GNU
3099 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3100 still be used to compile programs using the GNU C Library.
3102 * The GNU C Library is now built with -Werror by default. This can be
3103 disabled by configuring with --disable-werror.
3105 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3107 * The obsolete sigvec function has been removed. This was the original
3108 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3109 programs have been using instead for about 25 years. Of course, ABI
3110 compatibility for old binaries using sigvec remains intact.
3112 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3113 with newer versions of bison.
3115 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3116 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3117 registers overlay two consecutive single-precision registers. MIPS32R2
3118 introduced a new FPU mode (FR=1) where double-precision registers extend the
3119 corresponding single-precision registers which is incompatible with the
3120 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3121 require the use of FR=1 making a transition necessary. New o32 ABI
3122 extensions enable users to migrate over time from the original o32 ABI
3123 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3124 tracks the ABI of any loaded object and verifies that new objects are
3125 compatible. Mode transitions will also be requested as required and
3126 unsupportable objects will be rejected. The ABI checks include both soft and
3127 hard float ABIs for o32, n32 and n64.
3129 GCC 5 with GNU binutils 2.25 onwards:
3130 It is strongly recommended that all o32 system libraries are built using the
3131 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3132 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3133 compiler using --with-fp-32=xx to set this by default.
3137 * The following bugs are resolved with this release:
3139 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3140 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3141 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3142 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3143 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3144 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3145 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3146 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3147 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3148 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3149 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3150 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3151 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3152 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3153 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3155 * Reverted change of ABI data structures for s390 and s390x:
3156 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3157 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3158 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3159 are preserved pointing straight to the same implementation as the old ones.
3160 Given that, new callers will simply provide a too-big buffer to these
3161 functions. Any applications/libraries out there that embed jmp_buf or
3162 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3163 against 2.19 headers will have to rebuilt again. This is necessary in any
3164 case to revert the breakage in their ABI caused by the glibc change.
3166 * Support for file description locks is added to systems running the
3167 Linux kernel. The standard file locking interfaces are extended to
3168 operate on file descriptions, not file descriptors, via the use of
3169 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3170 are associated with an open file instead of a process.
3172 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3174 * The minimum Linux kernel version that this version of the GNU C Library
3175 can be used with is 2.6.32.
3177 * Running the testsuite no longer terminates as soon as a test fails.
3178 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3179 with PASS or FAIL lines for individual tests. A summary of the results is
3180 printed, including a list of failing lists, and "make check" exits with
3181 error status if there were any unexpected failures. "make check
3182 stop-on-test-failure=y" may be used to keep the old behavior.
3184 * The am33 port, which had not worked for several years, has been removed
3187 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3188 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3189 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3190 conflicted with POSIX (support for which was removed in 2.19), the
3191 interfaces those macros enabled remain available when compiling with
3192 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3193 test macros defined.
3195 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3197 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3198 This may improve lock scaling of existing programs on TX capable systems.
3199 The lock elision code is only built with --enable-lock-elision=yes and
3200 then requires a GCC version supporting the TX builtins. With lock elision
3201 default mutexes are elided via __builtin_tbegin, if the cpu supports
3202 transactions. By default lock elision is not enabled and the elision code
3205 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3206 copy the path argument. This allowed programs to cause posix_spawn to
3207 deference a dangling pointer, or use an unexpected pathname argument if
3208 the string was modified after the posix_spawn_file_actions_addopen
3211 * All supported architectures now use the main glibc sysdeps directory
3212 instead of some being in a separate "ports" directory (which was
3213 distributed separately before glibc 2.17).
3215 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3216 On configurations that support it (all Linux configurations), it's now
3217 used regardless of the --enable-add-ons switch to configure. It is no
3218 longer possible to build such configurations without pthreads support.
3220 * Locale names, including those obtained from environment variables (LANG
3221 and the LC_* variables), are more tightly checked for proper syntax.
3222 setlocale will now fail (with EINVAL) for locale names that are overly
3223 long, contain slashes without starting with a slash, or contain ".." path
3224 components. (CVE-2014-0475) Previously, some valid locale names were
3225 silently replaced with the "C" locale when running in AT_SECURE mode
3226 (e.g., in a SUID program). This is no longer necessary because of the
3229 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3230 with application code using Intel MPX instructions. (With all previous
3231 versions, the MPX register state could be clobbered when making calls
3232 into or out of a shared library.) Note that while the new dynamic
3233 linker is compatible with all known x86 hardware whether or not it
3234 supports Intel MPX, some x86 instruction-set emulators might fail to
3235 handle the new instruction encodings. This is known to affect Valgrind
3236 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3237 release), and might affect other tools that do instruction emulation.
3239 * Support for loadable gconv transliteration modules has been removed.
3240 The support for transliteration modules has been non-functional for
3241 over a decade, and the removal is prompted by security defects. The
3242 normal gconv conversion modules are still supported. Transliteration
3243 with //TRANSLIT is still possible, and the //IGNORE specifier
3244 continues to be supported. (CVE-2014-5119)
3246 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3247 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3248 resulting a denial-of-service security vulnerability in applications which
3249 use functions related to iconv. (CVE-2014-6040)
3253 * The following bugs are resolved with this release:
3255 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3256 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3257 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3258 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3259 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3260 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3261 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3262 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3263 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3264 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3265 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3266 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3267 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3268 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3269 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3270 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3271 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3272 16431, 16453, 16474, 16506, 16510, 16529
3274 * Slovenian translations for glibc messages have been contributed by the
3275 Translation Project's Slovenian team of translators.
3277 * The public headers no longer use __unused nor __block. This change is to
3278 support compiling programs that are derived from BSD sources and use
3279 __unused internally, and to support compiling with Clang's -fblock
3280 extension which uses __block.
3282 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3283 large collation sequences to optimize multiple passes. This cache
3284 computation may overflow for large collation sequences and may cause a
3285 stack or buffer overflow. This is now fixed to use a slower algorithm
3286 which does not use a cache if there is an integer overflow.
3288 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3289 rules for large collation sequences to optimize multiple passes and falls
3290 back to alloca if malloc fails, resulting in a possible stack overflow.
3291 The implementation now falls back to an uncached collation sequence lookup
3294 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3295 initialized for static applications resulting in the security feature
3296 being disabled. The pointer guard is now correctly initialized to a
3297 random value for static applications. Existing static applications need
3298 to be recompiled to take advantage of the fix (bug 15754).
3300 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3301 to the d_name member of struct dirent, or omit the terminating NUL
3302 character. (Bugzilla #14699).
3304 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3305 aligned_alloc functions could allocate too few bytes or corrupt the
3306 heap when passed very large allocation size values (Bugzilla #15855,
3309 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3310 for AF_INET6 has been fixed (Bugzilla #16072).
3312 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3313 pap_CW, quz_PE, the_NP.
3315 * Substantially revised locales: gd_GB, ht_HT
3317 * The LC_ADDRESS field was updated to support country_car for almost all
3320 * ISO 1427 definitions were updated.
3322 * ISO 3166 definitions were updated.
3324 * The localedef utility now supports --big-endian and --little-endian
3325 command-line options to generate locales for a different system from that
3326 for which the C library was built.
3328 * Binary locale files now only depend on the endianness of the system for
3329 which they are generated and not on other properties of that system. As a
3330 consequence, binary files generated with new localedef may be incompatible
3331 with old versions of the GNU C Library, and binary files generated with
3332 old localedef may be incompatible with this version of the GNU C Library,
3333 in the following circumstances:
3335 + Locale files may be incompatible on m68k systems.
3337 + Locale archive files (but not separate files for individual locales) may
3338 be incompatible on systems where plain "char" is signed.
3340 * The configure option --disable-versioning has been removed. Builds with
3341 --disable-versioning had not worked for several years.
3343 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3344 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3346 * SystemTap probes for malloc have been introduced.
3348 * SystemTap probes for slow multiple precision fallback paths of
3349 transcendental functions have been introduced.
3351 * Support for powerpc64le has been added.
3353 * The soft-float powerpc port now supports e500 processors.
3355 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3357 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3358 set of header declarations that are enabled by default, even when other
3359 feature test macros or compiler options such as -std=c99 would otherwise
3360 disable some of those declarations.
3362 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3363 conflict with POSIX. The libbsd-compat library (which was a dummy library
3364 that did nothing) has also been removed.
3366 * Preliminary documentation about Multi-Thread, Async-Signal and
3367 Async-Cancel Safety has been added.
3369 * Change of ABI data structures for s390 and s390x:
3370 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3371 allow for future hardware extensions. All library functions that accept or
3372 return these structures were versioned in order to provide backwards
3373 compatibility with existing code. However, not all cases can be handled
3374 with interface versioning. If an application embeds either structure into
3375 another structure and that structure is passed to another compilation unit
3376 which expects the newer larger-sized object then any access to the new
3377 fields will result in undefined behaviour. Similarly any access to fields
3378 that were moved by the enlarging of the structures will cause undefined
3379 behaviour. To fix the undefined behaviour all objects that are part of the
3380 final in-memory image must agree on the size of structures, and this may
3381 require recompilation.
3385 * The following bugs are resolved with this release:
3387 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3388 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3389 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3390 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3391 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3392 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3393 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3394 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3395 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3396 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3397 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3398 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3399 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3402 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3403 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3404 Distributions can re-enable building and using pt_chown via the new configure
3405 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3406 considerable security risks and should only be used if the distribution
3407 understands and accepts the risks.
3409 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3412 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3413 fixed (Bugzilla #15330).
3415 * Add support for calling C++11 thread_local object destructors on thread
3416 and program exit. This needs compiler support for offloading C++11
3417 destructor calls to glibc.
3419 * Improved worst case performance of libm functions with double inputs and
3422 * Support for priority inherited mutexes in pthread condition variables on
3423 non-x86 architectures.
3425 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3427 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3429 * Optimized string functions for ARM. Implemented by Will Newton and
3432 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3434 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3437 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3438 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3440 * Added a benchmark framework to track performance of functions in glibc.
3442 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3443 It is based on draft TS 18661 and currently enabled as a GNU extension.
3445 * On Linux, the clock function now uses the clock_gettime system call
3446 for improved precision, rather than old times system call.
3448 * Added support for version-3 tz format files. This is needed when using
3449 the tz database release 2013e or later, and affects a few unusual cases --
3450 currently only TZ='America/Godthab' for time stamps after 2037.
3452 * Added new API functions pthread_getattr_default_np and
3453 pthread_setattr_default_np to get and set the default pthread
3454 attributes of a process.
3456 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3457 This may improve lock scaling of existing programs on TSX capable systems.
3458 When the --enable-lock-elision=yes parameter is specified at configure
3459 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3462 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3463 availability). Implemented by Ryan S. Arnold.
3465 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3469 * The following bugs are resolved with this release:
3471 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3472 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3473 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3474 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3475 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3476 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3477 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3478 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3479 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3480 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3481 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3482 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3483 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3484 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3485 14879, 14889, 14893, 14898, 14914.
3487 * Optimization of memcpy for MIPS.
3489 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3490 EMFILE has been fixed (Bugzilla #14889).
3492 * The add-on ports collection is now distributed in the "ports" subdirectory
3493 of the main GNU C Library distribution, rather than separately.
3495 * Port to ARM AArch64 contributed by Linaro.
3497 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3498 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3500 Implemented by Andreas Krebbel.
3502 * The new function secure_getenv allows secure access to the environment,
3503 returning NULL if running in a SUID/SGID process. This function replaces
3504 the internal function __secure_getenv.
3506 * SystemTap static probes have been added into the dynamic linker.
3507 Implemented by Gary Benson.
3509 * Optimizations of string functions strstr, strcasestr and memmem.
3510 Implemented by Maxim Kuvyrkov.
3512 * The minimum Linux kernel version that this version of the GNU C Library
3513 can be used with is 2.6.16.
3515 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3516 powerpc POWER7. Implemented by Will Schmidt.
3518 * New configure option --disable-nscd builds the C library such that it
3519 never attempts to contact the Name Service Caching Daemon (nscd).
3520 New configure option --disable-build-nscd avoids building nscd itself;
3521 this is the default if --disable-nscd is used.
3523 * Improved support for cross-compilation, including cross-testing and
3524 bootstrap builds without a previously built glibc.
3526 * Several testsuite tests are now able to test multiple IFUNC variants of an
3527 interface, rather than just testing the one that would be chooen by
3530 * New configure options --with-bugurl and --with-pkgversion, for
3531 distributors to use to embed their bug-reporting and package version
3532 information in --help and --version output.
3534 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3535 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3536 allows creation of chroots without the procfs mounted on /proc.
3538 * The `crypt' function now fails if passed salt bytes that violate the
3539 specification for those values. On Linux, the `crypt' function will
3540 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3541 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3542 when the mode is enabled.
3544 * The `clock_*' suite of functions (declared in <time.h>) is now available
3545 directly in the main C library. Previously it was necessary to link with
3546 -lrt to use these functions. This change has the effect that a
3547 single-threaded program that uses a function such as `clock_gettime' (and
3548 is not linked with -lrt) will no longer implicitly load the pthreads
3549 library at runtime and so will not suffer the overheads associated with
3550 multi-thread support in other code such as the C++ runtime library.
3552 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3557 * The following bugs are resolved with this release:
3559 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3560 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3561 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3562 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3563 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3564 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3565 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3566 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3567 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3568 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3569 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3570 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3571 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3572 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3573 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3574 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3575 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3576 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3577 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3578 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3579 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3580 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3583 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3584 configuring glibc with:
3585 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3586 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3587 Implemented by H.J. Lu.
3591 + define static_assert
3593 + do not declare gets
3595 + declare at_quick_exit and quick_exit also for ISO C11
3597 + aligned_alloc. NB: The code is deliberately allows the size parameter
3598 to not be a multiple of the alignment. This is a moronic requirement
3599 in the standard but it is only a requirement on the caller, not the
3602 + timespec_get added
3604 + uchar.h support added
3606 + CMPLX, CMPLXF, CMPLXL added
3608 Implemented by Ulrich Drepper.
3610 * Support for the IA-64 has been moved to ports.
3612 * Remove support for anything but ELF binary format
3614 * Checking versions of poll, ppoll added.
3615 Implemented by Ulrich Drepper.
3617 * More generic and 64-bit performance optimizations to math functions.
3618 Implemented by Ulrich Drepper.
3620 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3621 headers and functions available at compile time as they were before
3622 version 2.14. This option will be removed at some time in the future
3623 after the TI-RPC library becomes fully sufficient for the needs of
3624 existing applications.
3626 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3627 Note that glibc is not expected to work with any Linux kernel version
3630 * New header <sys/auxv.h> and function getauxval allowing easy access to
3631 the AT_* key-value pairs passed from the Linux kernel. The header also
3632 defines the HWCAP_* bits associated with the AT_HWCAP key.
3634 * New locales: mag_IN
3636 * New configure option --enable-systemtap builds SystemTap static probes
3637 into libc for setjmp and longjmp and into libpthread for various operations.
3638 So far the setjmp/longjmp probes and some of the libpthread probes are
3639 provided only for i*86 and x86_64.
3640 Implemented by Roland McGrath and Rayson Ho.
3642 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3644 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3647 * More optimized functions for SPARC. Implemented by David S. Miller.
3649 * Improved support for cross-compilation, especially bootstrap builds
3650 without a previously built glibc.
3652 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3653 Chris Metcalf from Tilera.
3655 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3656 now supported for ARM processors.
3658 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3659 as the name of the dynamic linker, to distinguish it from the
3660 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3662 * Support for CRIS has been removed from ports.
3664 * A new class of installed header has been documented for low-level
3665 platform-specific functionality. PowerPC added the first instance with a
3666 function to provide time base register access. Contributed by Tulio
3667 Magno Quites Machado Filho.
3669 * ix86 configurations now install header files that are consistent with
3670 what x86-64 configurations install. These same header files can be used
3671 for -m32, -m64, or -mx32 builds.
3672 Contributed by H.J. Lu.
3674 * Math library bug fixes. A thorough audit of all open math library bugs was
3675 conducted by Joseph Myers. Significant progress was made on many math
3676 library bugs resulting in more accurate exceptions and function results.
3677 Many thanks to all those that contributed including Andreas Jaeger for his
3678 patch review and work on the x87 trigonometric instruction issues.
3680 * Timezone data is no longer installed. Timezone-related binaries and scripts
3681 will continue to be installed. Users should obtain their timezone data from
3682 their distribution provider or from the tzdata package at
3683 <ftp://munnari.oz.au/pub/>.
3687 * The following bugs are resolved with this release:
3689 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3690 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3691 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3692 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3693 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3694 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3695 13484, 13506, 13515, 13523, 13524, 13538, 13540
3697 * New program pldd to list loaded object of a process
3698 Implemented by Ulrich Drepper.
3700 * Add nss_db support back to glibc. No more dependency on Berkeley db
3701 and support for initgroups lookups.
3702 Implemented by Ulrich Drepper.
3704 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3705 Contributed by HJ Lu.
3707 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3708 Contributed by HJ Lu.
3710 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3711 on x86-32 and x86-64.
3712 Contributed by Liubov Dmitrieva.
3714 * Optimized strchr and strrchr for SSE on x86-32.
3715 Contributed by Liubov Dmitrieva.
3717 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3718 for x86-64 and x86-32.
3719 Contributed by Liubov Dmitrieva.
3721 * New interfaces: scandirat, scandirat64
3722 Implemented by Ulrich Drepper.
3724 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3725 Implemented by Ulrich Drepper.
3727 * nscd now also caches the netgroup database.
3728 Implemented by Ulrich Drepper.
3730 * Integrate libm with gcc's -ffinite-math-only option.
3731 Implemented by Ulrich Drepper.
3733 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3734 to math functions. Implemented by Ulrich Drepper.
3736 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3737 Implemented by Ulrich Drepper.
3739 * New Linux interfaces: process_vm_readv, process_vm_writev
3741 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3742 Implemented by Ulrich Drepper.
3744 * Optimized nearbyint and strcasecmp for PPC.
3745 Implemented by Adhemerval Zanella.
3747 * New locales: bho_IN, unm_US, es_CU, ta_LK
3751 * The following bugs are resolved with this release:
3753 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3754 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3755 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3756 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3757 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3758 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3759 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3760 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3761 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3762 12795, 12811, 12813, 12814, 12841
3764 * The RPC implementation in libc is obsoleted. Old programs keep working
3765 but new programs cannot be linked with the routines in libc anymore.
3766 Programs in need of RPC functionality must be linked against TI-RPC.
3767 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3769 Visible changes of this change include (obviously) the inability to link
3770 programs using RPC functions without referencing the TI-RPC library and the
3771 removal of the RPC headers from the glibc headers.
3772 Implemented by Ulrich Drepper.
3774 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3775 syncfs, setns, sendmmsg
3777 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3778 yue_HK, lij_IT, mhr_RU
3780 * New encodings: CP770, CP771, CP772, CP773, CP774
3782 * New program sotruss to trace calls through PLTs
3783 Implemented by Ulrich Drepper.
3785 * The malloc hook implementation is marked deprecated and will be removed
3786 from the default implementation in the next version. The design never
3787 worked ever since the introduction of threads. Even programs which do
3788 not create threads themselves can use multiple threads created internally.
3792 * The following bugs are resolved with this release:
3794 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3795 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3796 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3797 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3800 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3802 * POWER7 optimizations: memset, memcmp, strncmp
3804 * New optimized string functions for x86-64: strnlen (SSE2),
3805 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3806 Implemented by Ulrich Drepper.
3810 * The following bugs are resolved with this release:
3812 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3813 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3814 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3815 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3816 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3817 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3818 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3819 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3821 * New interfaces: pthread_getname_np, pthread_setname_np
3823 * New Linux interface: recvmmsg
3825 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3827 * The dynamic linker now recognizes supported ABI versions from the
3828 EI_ABIVERSION field in the ELF header.
3829 Implemented by Ulrich Drepper.
3831 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3832 will not be used to fill in password fields in the passwd.byname replies.
3833 Instead it is used to synthesize the shadow.byname table, should it be
3834 missing. This is a useful mode in some installations involving Solaris.
3835 Implemented by Ulrich Drepper.
3837 * New locales: kok_IN, sq_MK, cv_RU
3841 * The following bugs are resolved with this release:
3843 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3844 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3845 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3846 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3847 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3848 10789, 10817, 10823, 10840, 10847
3850 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3852 Implemented by Ulrich Drepper.
3854 * Checking version of longjmp added that fails if an uninitialized stack
3855 frame would be created. Implemented by Ulrich Drepper.
3857 * STT_GNU_IFUNC is now supported in static executables.
3858 Implemented by H.J. Lu.
3860 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3862 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3863 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3864 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3865 Contributed by H.J. Lu.
3867 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3868 Implemented by Ulrich Drepper.
3870 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3872 Contributed by H.J. Lu.
3874 * Support for fma instruction in AVX on x86-64.
3875 Implemented by H.J. Lu and Ulrich Drepper.
3877 * AVX support in x86-64 auditing support in ld.so.
3878 Implemented by H.J. Lu.
3880 * STB_GNU_UNIQUE support added.
3881 Implemented by Ulrich Drepper.
3883 * Implement second fallback mode for optimized DNS lookup for even more
3884 broken environments. If two requests from the same port are not
3885 handled correctly close the socket and open a new one before sending
3886 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3887 can be used to select this mode right away, instead of rediscovering the
3888 necessity is every process again.
3889 Implemented by Ulrich Drepper.
3891 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3892 Implemented by Adam Tkac.
3894 * Optimized iconv conversions for S390x.
3895 Implemented by Andreas Krebbel.
3897 * Using condvars with PI mutexes is now more efficient due to kernel
3898 support for requeueing to PI futexes. NPTL support added for x86-64.
3899 Implemented by Ulrich Drepper.
3901 * New locales: ps_AF, my_MM
3905 * The following bugs are resolved with this release:
3907 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3908 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3909 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3910 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3911 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3913 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3914 Implemented by Ulrich Drepper.
3916 * New Linux interfaces: accept4, fallocate, fallocate64.
3917 Implemented by Ulrich Drepper.
3919 * Correct declarations of string function when used in C++ code. This
3920 could lead to compile errors for invalid C++ code.
3922 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3925 * New POSIX 2008 interface: psiginfo
3926 Implemented by Ulrich Drepper.
3928 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3929 Implemented by Ulrich Drepper.
3931 * Support for selecting between multiple function definitions at runtime
3932 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3934 * The libcrypt library can now use the hash function implementations in
3935 NSS. Implemented by Ulrich Drepper.
3937 * The malloc implementation can be compiled to be less memory efficient
3938 but higher performing in multi-threaded programs.
3939 Implemented by Ulrich Drepper.
3941 * New locales: nan_TW@latin, ks_IN
3943 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3944 Implemented by Ulrich Drepper.
3946 * Extended printf hook support. It is possible to use user-defined types
3947 and extend existing format specifiers.
3948 Implemented by Ulrich Drepper.
3950 * Handling for group shadow files has been added.
3951 Implemented by Ulrich Drepper.
3953 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3954 servers (the case, e.g., for some people using the built-in DNS
3955 server in ADSL modems/routers). There is a once-per-process timeout
3956 in case of a broken server. To avoid it, users can run nscd or put
3957 'options single-request' in /etc/resolv.conf.
3958 Implemented by Ulrich Drepper.
3962 * The following bugs are resolved with this release:
3964 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3965 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3966 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3967 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3968 6968, 6974, 6980, 6995, 7008, 7009, 7029
3970 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3971 up at the same time. Implemented by Ulrich Drepper.
3973 * TLS descriptors for LD and GD on x86 and x86-64.
3974 Implemented by Alexandre Oliva.
3976 * getaddrinfo now handles DCCP and UDPlite.
3977 Implemented by Ulrich Drepper.
3979 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3980 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3981 Implemented by Ulrich Drepper.
3983 * New implementation of memmem, strstr, and strcasestr which is O(n).
3984 Implemented by Eric Blake.
3986 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3988 * Implement "e" option for popen to open file descriptor with the
3989 close-on-exec flag set. Implemented by Ulrich Drepper.
3991 * Implement "b" mode for fmemopen. In this mode writes writes don't
3992 implicitly add a NUL byte and seeks from the end of the buffer really
3993 use the buffer end, not the string length as the basis.
3994 Implemented by Ulrich Drepper.
3996 * Many functions, exported and internal, now atomically set the close-on-exec
3997 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3999 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4001 Implemented by Pravin Satpute.
4003 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4007 * The following bugs are resolved with this release:
4009 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4010 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4011 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4012 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4013 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4014 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4015 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4017 * New locales: bo_CN, bo_IN, shs_CA.
4019 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4021 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4022 Implemented by Pravin Satpute.
4024 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4026 * nscd caches now all timeouts for DNS entries
4027 Implemented by Ulrich Drepper.
4029 * nscd is more efficient and wakes up less often.
4030 Implemented by Ulrich Drepper.
4032 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4033 vdprintf, and obstack_vprintf.
4034 Implemented by Jakub Jelinek.
4036 * Faster memset for x86-64.
4037 Implemented by Harsha Jagasia and H.J. Lu.
4039 * Faster memcpy on x86.
4040 Implemented by Ulrich Drepper.
4042 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4043 Implemented by Ulrich Drepper.
4045 * Faster sqrt and sqrtf implemention for some PPC variants.
4046 Implemented by Steven Munroe.
4050 * The following bugs are resolved with this release:
4052 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4053 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4054 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4055 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4056 5071, 5103, 5104, 5112, 5113, 5184, 5186
4058 * More checking functions: fread, fread_unlocked, open*, mq_open.
4059 Implemented by Jakub Jelinek and Ulrich Drepper.
4061 * Extend fortification to C++. Implemented by Jakub Jelinek.
4063 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4064 by not recognizing 'a' as a modifier when those specs are requested.
4065 Implemented by Jakub Jelinek.
4067 * PPC optimizations to math and string functions.
4068 Implemented by Steven Munroe.
4070 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4071 options to be passed. Implemented by Ulrich Drepper.
4073 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4075 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4076 Implemented by Ulrich Drepper.
4078 * Handle private futexes in the NPTL implementation.
4079 Implemented by Jakub Jelinek and Ulrich Drepper.
4081 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4082 Implemented by Roland McGrath and Ulrich Drepper.
4084 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4086 * SHA-256 and SHA-512 based password encryption.
4087 Implemented by Ulrich Drepper.
4089 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4090 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4093 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4094 Implemented by Ulrich Drepper.
4098 * The following bugs are resolved with this release:
4100 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4101 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4102 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4103 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4104 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4105 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4106 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4109 * New Linux interfaces: epoll_pwait, sched_getcpu.
4111 * New generic interfaces: strerror_l.
4113 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4117 * The following bugs are resolved with this release:
4119 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4120 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4121 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4122 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4123 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4124 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4125 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4126 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4127 3225, 3251, 3252, 3253, 3273
4129 * For Linux, the sorting of addresses returned by getaddrinfo now also
4130 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4131 Implemented by Ulrich Drepper.
4133 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4134 Implemented by Ulrich Drepper.
4136 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4138 * New iconv module for MIK. Contributed by Alexander Shopov.
4140 * For sites with broken group and/or passwd database, the auto-propagate
4141 option of nscd can prevent creating ID lookup entries from the results
4142 of a name lookup and vice versa. This usually is no problem but some
4143 site might have problems with the default behavior.
4144 Implemented by Ulrich Drepper.
4146 * Iterating over entire database in NIS can be slow. With the
4147 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4148 to trade time for memory. The entire database will be read at once.
4149 Implemented by Ulrich Drepper.
4151 * The interfaces introduced in RFC 3542 have been implemented by
4154 * Support for the new ELF hash table format was added by Ulrich Drepper.
4156 * Support for priority inheritance mutexes added by Jakub Jelinek and
4159 * Support for priority protected mutexes added by Jakub Jelinek.
4161 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4162 or_IN, csb_PL, fy_NL, sr_ME.
4166 * More overflow detection functions.
4168 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4169 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4171 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4172 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4173 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4174 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4175 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4176 by Masahide Washizawa.
4178 * It is now possible to install audit libraries for the dynamic linker using
4179 LD_AUDIT. Implemented by Ulrich Drepper.
4181 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4182 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4183 For a libc and libpthread that works well on Linux 2.4 kernels, we
4184 recommend using the stable 2.3 branch.
4186 * The new function open_wmemstream acts like open_memstream,
4187 but uses a wchar_t wide character buffer.
4189 * The new function ppoll is an improved version of poll, similar to pselect.
4191 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4192 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4193 renameat, unlinkat, linkat, symlinkat, readlinkat.
4195 * New Linux kernel system calls: unshare,
4196 inotify_init, inotify_add_watch, inotify_rm_watch.
4198 * The euidaccess function is now also known by the alias eaccess,
4199 for compatibility with some other systems.
4201 * Timezone data updated to 2006b version.
4205 * The following bugs are resolved with this release:
4207 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4208 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4209 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4210 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4211 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4212 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4214 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4216 * As of this release, GCC 4 can be used to compile the C Library.
4218 * Timezone data updated to 2005m version.
4222 * The following bugs are resolved with this release:
4224 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4225 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4226 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4227 777, 787, 821, 822, 823, 825
4229 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4233 * Support for RFC 3678. Real implementations exist only for Linux so far.
4234 Implemented by Ulrich Drepper.
4236 * nscd can now cache entries persistently. Expiring entries are reloaded.
4237 For speedups the cache can be shared in memory with client processes.
4238 Implemented by Ulrich Drepper.
4240 * nscd can now perform SELinux checks.
4241 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4243 * getaddrinfo queries are now cached. Canonical name lookup is performed
4245 Implemented by Ulrich Drepper.
4247 * The nothrow function attribute is used when headers are used by gcc when
4248 compiling C code. This can avoid significant amounts of exception
4251 * The malloc functions perform more error checking and are stricter when
4252 it comes to reacting on errors. The default action is to terminate
4253 the process after showing an error message. Implemented by Ulrich Drepper.
4255 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4256 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4258 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4259 namespaces using the new function dlmopen(). This feature is of course,
4260 like most other dynamic loading functionality, not available in statically
4261 linked applications. Implemented by Ulrich Drepper.
4263 * Low-overhead boundary checking variants of string and some stdio functions
4264 were added. These are to be used in conjunction with a gcc patch by
4265 Jakub Jelinek which adds calls to these functions if possible.
4266 Implemented by Jakub Jelinek and Ulrich Drepper.
4268 * Old code for several operating systems and machine architectures that
4269 have not been in working condition in a long time have been removed from
4270 the main source tree maintained by the GNU C Library's maintainers.
4271 These files are now reside in the separate `ports' source module
4272 that is usable as an add-on when building the library.
4276 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4277 interrogate the dynamic linker, compatible with the Solaris interface.
4279 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4280 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4282 * getifaddrs now uses the netlink interface on Linux to get its information.
4283 Implemented by Thorsten Kukuk.
4285 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4286 Implemented by Ulrich Drepper.
4288 * support for non-executable stacks on x86 has been added. Changes mostly
4291 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4294 * getaddrinfo now performs destination address selection according to
4299 * Thread-safe interfaces for many functions that access locale data
4300 were added in version 2.3, but these features were omitted from NEWS.
4301 Many functions have variants with an `_l' suffix that take a `locale_t'
4302 object as a parameter rather than consulting the current locale.
4303 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4304 create and maintain `locale_t' objects. Additionally, the new function
4305 `uselocale' sets "the current locale" (as used by functions not so
4306 parameterized) set for an individual thread. These features were added
4307 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4309 * The functions getresuid, getresgid, setresuid, and setresgid, which
4310 have long been available on Linux, are now declared in <unistd.h>
4311 and are now also available on the Hurd.
4313 * ELF thread-local storage support (TLS) now works on x86-64.
4315 * The new dynamic string token $LIB is expanded in shared library names.
4316 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4318 * Aldy Hernandez contributed complete software floating point support for
4319 PowerPC machines with no FPU.
4321 * fexecve is implemented on Linux.
4323 * The `btowc' function should work at least twice as fast due to
4324 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4326 * With approriate thread add-ons cancelable functions are now implemented
4327 in libc.so as well. No need to call the function in libpthread. This
4328 change allowed to finally disable the incorrect and expensive handling
4329 of weak definition in ld.so.
4331 * Yet more PLT entries in libc.so have been removed. We finally arrived
4332 at the bare minimum. Startup times improved appropriately.
4334 * Support for the new Linux/x86 system call interface was added. The
4335 AT_SYSINFO auxiliary vector entry is recognized and handled.
4339 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4342 * iconv (the program and the interface) now accepts empty names (excluding
4343 options like //TRANSLIT) to mean "use charset of current locale".
4345 * localedef can now transliterate characters in strings which are not in
4346 the provided charmap. The information from the input locale is used.
4348 * Prelinking support was added for ELF targets. This requires additional
4349 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4351 * Read-only stdio streams now use mmap to speed up operation by eliminating
4352 copying and buffer underflows. To use add 'm' to the mode string of
4353 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4355 * The malloc functions were completely rewritten by Wolfram Gloger based
4356 on Doug Lea's malloc-2.7.0.c.
4358 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4359 implementation of regex.
4361 * Bruno Haible upgraded the iconv and locale implementation to support
4364 * Contents of the LC_* and LANG environment variables in the CEN style are
4365 not recognized anymore. It never was used. Change by Ulrich Drepper.
4367 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4368 thread-local storage (TLS) ABI on some platforms.
4369 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4371 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4372 EUC-JISX0213, and TSCII.
4374 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4375 BSD-compatible interface for getting all network interface addresses.
4376 Implementation for IPv4 by Roland McGrath.
4378 * Loading of locale data is faster due to the introduction of a locale
4379 archive. Implemented by Roland McGrath and Ulrich Drepper.
4381 * Startup times are significantly reduced by not using exported functions
4382 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4385 * Steven Munroe contributed a port to PowerPC64/Linux.
4389 * The Hurd now uses the GNU libio implementation of stdio rather than the
4390 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4392 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4393 with the same behavior as the Linux system call of the same name.
4397 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4398 128-bit long double format.
4400 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4401 IBM1161, and IBM1162 charsets.
4403 * Andreas Jaeger contributed a port to x86-64/Linux.
4405 * Peter Bruin contributed a port to PowerPC/Hurd.
4407 * libc functions using I/O streams now can handle wide-oriented streams
4410 * optimizations in the dynamic linker. Binaries created by recent binutils
4411 versions start up quicker due to reduced time spent on relocations.
4413 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4417 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4418 asinh, atanh, j0 for the 128-bit long double format.
4420 * Bruno Haible updated all the code handling Unicode in some form to
4421 support Unicode 3.1.
4423 * Speed of regex for single-byte locales is back to previous levels.
4424 Patch by Isamu Hasegawa.
4426 * Alpha, SPARC, and IA-64 now also using floating stacks.
4428 * Startup time of internationalized applications greatly improved through
4429 iconv cache. Use iconvconfig to generate the cache file.
4430 Contributed by Ulrich Drepper.
4432 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4433 severe performance problems. Patch by David Mosberger.
4435 * The Hurd port got a lot more functionality like AIO, various stdio
4436 extensions, etc. Mainly done by Roland McGrath.
4438 * mtrace can now lookup symbols in shared libraries.
4442 * Intel's IA-64 math library is largely integrated. It provides fast and
4443 accurate implementatations for most basic and standard math functions
4444 in float, double, and long double format.
4446 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4447 and asin for the 96-bit long double format and asin, log, tan for the
4448 128-bit long double format.
4450 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4451 The basic double functions exist today. Contributed by Abraham Ziv
4452 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4453 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4455 * An asynchronous name lookup library was added. The interface is designed
4456 after POSIX AIO. The proposal was circulated beforehand to get comments.
4457 No negative ones came in. Implemented by Ulrich Drepper.
4459 * Port to S390/64bit contributed by Martin Schwidefsky
4460 <schwidefsky@de.ibm.com>.
4462 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4463 of functions for Linux/IA-64.
4465 * The RPC code is now thread safe. Threads can now use the same service
4466 of different services at the same time. Patch by Eric Norum
4467 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4469 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4470 family of functions for Linux/S390.
4472 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4473 of functions for Linux/x86.
4475 * Port to Linux/CRIS contributed by Axis Communications.
4479 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4480 we can now check for namespace violations and missing declarations. The
4481 result is that almost all headers are now Unix-compliant (as defined in
4482 the upcoming XPG6). The negative side is that some programs might need
4483 corrections, too, if they depend on the incorrect form of the headers in
4484 previous versions which defined too many symbols and included too many
4487 * regex now handles multibyte character sets correctly.
4488 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4490 * iconv (the program) does now conform to the upcoming XPG6 and handles
4491 charmaps. Instead of the charset names the path of charmaps can be
4492 provided and the conversion happens based on this data.
4493 Contributed by Ulrich Drepper.
4495 * The locale program now provides detailed information about the installed
4500 only lists the names of the supported locales
4504 provides details such as country, language, and codeset name.
4505 Contributed by Ulrich Drepper.
4509 * The gencat program now parses the input file according to the charset
4510 selected by the LC_CTYPE category. This is important for stateful
4511 character sets. To make generating catalogs easier there is a way
4512 to overwrite the charset selected by the locale: before the first
4513 message or $ quote line the catalog can contain a line like
4515 $ codeset=ISO-8859-2
4517 to select the charset (ISO-8859-2 in this case).
4519 Implemented by Shinya Hanataka and Ulrich Drepper.
4521 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4522 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4523 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4525 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4526 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4528 * The LANGUAGE environment variable is now ignored unless the locale is
4529 changed from the default "C" locale.
4531 * The usual bug fixes.
4535 * Greg McGary added runtime support for bounds checking using gcc's
4536 new -fbounded-pointers option. ix86 target is complete. PowerPC
4539 * Thorsten Kukuk added secure mode support to nscd.
4541 * The Berkeley db libraries have been removed.
4543 Related, the nss_db module is now in a separate package since it
4544 obviously requires a database library being available.
4546 * Wide character I/O streams implemented by Ulrich Drepper.
4548 * Functions from the extended socket API added by Ulrich Drepper.
4550 * Functions feenableexcept and fedisableexcept to control the
4551 behaviour of individual exceptions have been added by Andreas Jaeger.
4553 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4555 * The resolver code has been updated from bind 8.2.3-T5B which supports
4556 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4559 This change could in some situations effect backward compatibility. Since
4560 now `_res' is a thread-local instead of a global variable, modifying it
4561 in one thread does not have any effect in other threads.
4563 The resolver library was also extended to allow IPv6 as the transport
4564 protocol for the requests. This work was done by Stig Venaas.
4566 * Compatibility code for K&R C compilers has been removed from the
4567 header files. A ISO C compiler is needed to use the library
4568 (conforming to either C89 or C99 standard).
4570 * Complete rewrite of the localedef program to support multibyte character
4571 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4572 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4573 Implemented by Ulrich Drepper.
4575 Bruno Haible significantly improved the generation and use of the data
4576 structures for the wide character tables.
4578 * Plural handling in gettext implemented by Ulrich Drepper.
4580 * The utmp daemon has been removed.
4582 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4584 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4587 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4589 * POSIX barriers implemented by Kaz Kylheku.
4591 * POSIX spawn function family implemented by Ulrich Drepper.
4593 * POSIX spinlocks are now available.
4595 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4597 * the configure option --enable-kernel=X.Y.Z allows to strip out
4598 compatibility for kernel versions before X.Y.Z. This is currently only
4599 implemented for Linux.
4601 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4602 field sin6_scope_id. This means that all programs using IPv6 should be
4603 recompiled. Don't expect binary compatibility with previous glibc
4606 * various conversion modules for IBM character sets contributed by
4609 * IA-64 port by Jes Sorensen and HJ Lu.
4623 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4625 * New xdr functions are added; some rpc functions are now 64bit clean.
4627 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4629 * Fixed known incompatibilities with glibc 2.0.
4631 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4633 * Optimized a number of functions (especially the ELF dynamic loader).
4635 * Update timezone data files.
4637 * lots of charmaps corrections
4639 * some new locale definitions and charmaps
4644 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4645 conform to POSIX member type requirements. Symbol versions have been
4646 adjusted as needed within the library, and for direct use by applications,
4647 but there is potential for problems if third-party libraries use
4648 struct timeval as part of their interface. This does not present
4649 a problem for X and other "essential" system libraries.
4651 * An additional locale model to support C++ Standard Library locale
4652 model and probably more was implemented by Ulrich Drepper.
4654 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4657 * Miles Bader provided the `argp' function family to support hierachical
4658 command line argument parsing, layered on top of getopt.
4660 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4662 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4665 * scanf recognizes the %a and %A format for scanning floating point numbers.
4667 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4668 information and interfaces for the available integer types.
4670 * about 130 new math functions were added to implement the ISO C9x math
4673 * the new header <complex.h> contains definitions of the complex math
4674 functions from ISO C 9X.
4676 * the new header <tgmath.h> defines generic macros to use complex or
4677 real valued functions.
4679 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4681 * Andreas Jaeger provided a test suite for the math library.
4683 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4685 * Ulrich Drepper added character set conversion functions (iconv).
4687 * Optimized string functions have been added.
4689 * The localedata addon is now part of glibc.
4691 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4693 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4694 daemon for NSS (nscd).
4696 Missing a better place here are some numbers on improvements. Under
4697 Linux 2.1.125 un-tar-ing the kernel sources takes
4701 using local files 12.19s 6.88s 22.91s
4703 using NIS 13.92s 8.91s 26.34s
4705 using NIS & nscd 10.37s 7.34s 25.30s
4707 using NIS+ 27.57s 30.37s 640.46s
4709 using NIS+ & nscd 10.25s 7.83s 26.51s
4711 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4713 Keep in mind that non-namelookup related operations dominate above times.
4714 It was just a common complain that using NIS+ unpacking the kernel is
4717 [1] The old nscd implementation is not available anymore since it was
4718 distributed with glibc up to version 2.0.98 and thus is now replaced.
4720 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4722 * Mark Kettenis provided a Hesiod NSS module.
4724 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4725 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4727 * rcmd can now handle netgroups (Dick Streefland).
4729 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4732 * Support for the IPv6 protocol has been added to the socket API, as per the
4733 latest draft standards.
4735 * Support for Linux 2.2 has been added.
4737 * Interface changes relative to the latest 2.0.x release:
4738 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4739 addseverity NEW: Unix98
4740 alphasort64 NEW: LFS
4741 argp_err_exit_status NEW: argp, GNU ext
4742 argp_error NEW: argp, GNU ext
4743 argp_failure NEW: argp, GNU ext
4744 argp_help NEW: argp, GNU ext
4745 argp_parse NEW: argp, GNU ext
4746 argp_program_bug_address NEW: argp, GNU ext
4747 argp_program_version NEW: argp, GNU ext
4748 argp_program_version_hook NEW: argp, GNU ext
4749 argp_state_help NEW: argp, GNU ext
4750 argp_usage NEW: argp, GNU ext
4751 authdes_create NEW: Secure RPC
4752 authdes_getucred NEW: Secure RPC
4753 authdes_pk_create NEW: Secure RPC
4754 backtrace NEW: GNU ext.
4755 backtrace_symbols NEW: GNU ext.
4756 backtrace_symbols_fd NEW: GNU ext.
4758 cacosf NEW: ISO C 9x
4759 cacosh NEW: ISO C 9x
4760 cacoshf NEW: ISO C 9x
4761 cacoshl NEW: ISO C 9x
4762 cacosl NEW: ISO C 9x
4769 casinf NEW: ISO C 9x
4770 casinh NEW: ISO C 9x
4771 casinhf NEW: ISO C 9x
4772 casinhl NEW: ISO C 9x
4773 casinl NEW: ISO C 9x
4775 catanf NEW: ISO C 9x
4776 catanh NEW: ISO C 9x
4777 catanhf NEW: ISO C 9x
4778 catanhl NEW: ISO C 9x
4779 catanl NEW: ISO C 9x
4780 cbc_crypt NEW: Secure RPC
4784 ccoshf NEW: ISO C 9x
4785 ccoshl NEW: ISO C 9x
4791 cimagf NEW: ISO C 9x
4792 cimagl NEW: ISO C 9x
4793 clearerr_locked REMOVED
4794 clntunix_create NEW: sunrpc ext
4796 clog10 NEW: ISO C 9x
4797 clog10f NEW: ISO C 9x
4798 clog10l NEW: ISO C 9x
4808 cprojf NEW: ISO C 9x
4809 cprojl NEW: ISO C 9x
4811 crealf NEW: ISO C 9x
4812 creall NEW: ISO C 9x
4817 csinhf NEW: ISO C 9x
4818 csinhl NEW: ISO C 9x
4821 csqrtf NEW: ISO C 9x
4822 csqrtl NEW: ISO C 9x
4826 ctanhf NEW: ISO C 9x
4827 ctanhl NEW: ISO C 9x
4829 des_setparity NEW: Secure RPC
4830 ecb_crypt NEW: Secure RPC
4831 endutxent NEW: Unix98
4833 exp10f NEW: ISO C 9x
4834 exp10l NEW: ISO C 9x
4838 fattach NEW: STREAMS
4839 fdetach NEW: STREAMS
4843 feclearexcept NEW: ISO C 9x
4844 fegetenv NEW: ISO C 9x
4845 fegetexceptflag NEW: ISO C 9x
4846 fegetround NEW: ISO C 9x
4847 feholdexcept NEW: ISO C 9x
4849 feraiseexcept NEW: ISO C 9x
4850 ferror_locked REMOVED
4851 fesetenv NEW: ISO C 9x
4852 fesetexceptflag NEW: ISO C 9x
4853 fesetround NEW: ISO C 9x
4854 fetestexcept NEW: ISO C 9x
4855 feupdateenv NEW: ISO C 9x
4856 fflush_locked REMOVED
4860 fgets_unlocked NEW: GNU ext.
4861 fileno_locked REMOVED
4873 fputc_locked REMOVED
4874 fputs_unlocked NEW: GNU ext.
4875 fread_unlocked NEW: GNU ext.
4880 fstatvfs NEW: Unix98
4884 ftruncate64 NEW: LFS
4886 fwrite_unlocked NEW: GNU ext.
4887 gai_strerror NEW: IPv6
4891 getchar_locked REMOVED
4893 getdate_err NEW: Unix98
4894 getdate_r NEW: GNU ext.
4896 getnameinfo NEW: IPv6
4897 getnetname NEW: Secure RPC
4898 getpmsg NEW: STREAMS
4899 getpt NEW: Unix98 PTY
4900 getrlimit64 NEW: LFS
4901 getutxent NEW: Unix98
4902 getutxid NEW: Unix98
4903 getutxline NEW: Unix98
4904 glob64 NEW: GNU ext.
4905 globfree64 NEW: GNU ext.
4906 gnu_get_libc_release NEW: GNU ext.
4907 gnu_get_libc_version NEW: GNU ext.
4908 grantpt NEW: Unix98 PTY
4909 host2netname NEW: Secure RPC
4911 iconv_close NEW: iconv
4912 iconv_open NEW: iconv
4913 if_freenameindex NEW: IPv6
4914 if_indextoname NEW: IPv6
4915 if_nameindex NEW: IPv6
4916 if_nametoindex NEW: IPv6
4917 in6addr_any NEW: IPv6
4918 in6addr_loopback NEW: IPv6
4919 inet6_isipv4mapped NEW: IPv6
4920 isastream NEW: STREAMS
4921 iswblank NEW: GNU ext.
4922 key_decryptsession NEW: Secure RPC
4923 key_decryptsession_pk NEW: Secure RPC
4924 key_encryptsession NEW: Secure RPC
4925 key_encryptsession_pk NEW: Secure RPC
4926 key_gendes NEW: Secure RPC
4927 key_get_conv NEW: Secure RPC
4928 key_secretkey_is_set NEW: Secure RPC
4929 key_setnet NEW: Secure RPC
4930 key_setsecret NEW: Secure RPC
4931 llrint NEW: ISO C 9x
4932 llrintf NEW: ISO C 9x
4933 llrintl NEW: ISO C 9x
4934 llround NEW: ISO C 9x
4935 llroundf NEW: ISO C 9x
4936 llroundl NEW: ISO C 9x
4941 lrintf NEW: ISO C 9x
4942 lrintl NEW: ISO C 9x
4943 lround NEW: ISO C 9x
4944 lroundf NEW: ISO C 9x
4945 lroundl NEW: ISO C 9x
4947 makecontext NEW: Unix98
4948 mempcpy NEW: GNU ext.
4951 modify_ldt NEW: kernel
4955 nearbyint NEW: ISO C 9x
4956 nearbyintf NEW: ISO C 9x
4957 nearbyintl NEW: ISO C 9x
4958 netname2host NEW: Secure RPC
4959 netname2user NEW: Secure RPC
4960 nexttoward NEW: ISO C 9x
4961 nexttowardf NEW: ISO C 9x
4962 nexttowardl NEW: ISO C 9x
4966 passwd2des NEW: Secure RPC
4968 pow10f NEW: GNU ext.
4969 pow10l NEW: GNU ext.
4972 printf_size NEW: GNU ext.
4973 printf_size_info NEW: GNU ext.
4974 profil_counter REMOVED
4975 pthread_mutexattr_getkind_np REPLACED
4976 pthread_mutexattr_setkind_np REPLACED
4977 ptsname NEW: Unix98 PTY
4978 ptsname_r NEW: Unix98 PTY
4980 putchar_locked REMOVED
4981 putgrent NEW: GNU ext.
4983 putpmsg NEW: STREAMS
4984 pututxline NEW: Unix98
4988 readdir64_r NEW: LFS
4989 remquo NEW: ISO C 9x
4990 remquof NEW: ISO C 9x
4991 remquol NEW: ISO C 9x
4993 roundf NEW: ISO C 9x
4994 roundl NEW: ISO C 9x
4996 scalbln NEW: ISO C 9x
4997 scalblnf NEW: ISO C 9x
4998 scalblnl NEW: ISO C 9x
5000 sendfile NEW: kernel
5001 setcontext NEW: Unix98
5002 setrlimit64 NEW: LFS
5003 setutxent NEW: Unix98
5005 sigignore NEW: Unix98
5006 sigqueue NEW: POSIX.1b
5007 sigrelse NEW: Unix98
5008 sigset NEW: POSIX.1b
5009 sigtimedwait NEW: POSIX.1b
5010 sigwaitinfo NEW: POSIX.1b
5011 sincos NEW: GNU ext.
5012 sincosf NEW: GNU ext.
5013 sincosl NEW: GNU ext.
5017 strcasestr NEW: GNU ext.
5018 strtoimax NEW: ISO C 9x
5019 strtoumax NEW: ISO C 9x
5020 strverscmp NEW: GNU ext.
5021 svcauthdes_stats NEW: Secure RPC
5022 svcunix_create NEW: sunrpc etx
5023 svcunixfd_create NEW: sunrpc ext
5024 swapcontext NEW: Unix98
5025 tcgetsid NEW: Unix98 PTY
5026 tdestroy NEW: GNU ext.
5027 tgamma NEW: ISO C 9x
5028 tgammaf NEW: ISO C 9x
5029 tgammal NEW: ISO C 9x
5033 truncf NEW: ISO C 9x
5034 truncl NEW: ISO C 9x
5036 unlockpt NEW: Unix98 PTY
5037 updwtmpx NEW: Unix98
5038 user2netname NEW: Secure RPC
5039 utmpxname NEW: Unix98
5040 versionsort NEW: GNU ext.
5041 versionsort64 NEW: GNU ext.
5043 wcscasecmp NEW: GNU ext.
5044 wcsncasecmp NEW: GNU ext.
5045 wcsnlen NEW: GNU ext.
5046 wcstoimax NEW: ISO C 9x
5047 wcstoll NEW: ISO C 9x
5048 wcstoull NEW: ISO C 9x
5049 wcstoumax NEW: ISO C 9x
5051 wordexp NEW: POSIX.2
5052 wordfree NEW: POSIX.2
5053 write_profiling REMOVED
5054 xdecrypt NEW: Secure RPC
5055 xdr_authdes_cred NEW: Secure RPC
5056 xdr_authdes_verf NEW: Secure RPC
5057 xdr_cryptkeyarg NEW: Secure RPC
5058 xdr_cryptkeyarg2 NEW: Secure RPC
5059 xdr_cryptkeyres NEW: Secure RPC
5060 xdr_getcredres NEW: Secure RPC
5061 xdr_key_netstarg NEW: Secure RPC
5062 xdr_key_netstres NEW: Secure RPC
5063 xdr_keybuf NEW: Secure RPC
5064 xdr_keystatus NEW: Secure RPC
5065 xdr_netnamestr NEW: Secure RPC
5066 xdr_sizeof NEW: Secure RPC
5067 xdr_unixcred NEW: sunrpc ext
5068 xencrypt NEW: Secure RPC
5069 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5080 * inet_ntoa is thread-safe
5082 * updwtmp is moved from libutil to libc
5084 * rewrite of cbrt function
5086 * update of timezone data
5100 * add atoll function
5102 * fix complex problems in Berkeley DB code
5104 * fix math functions
5108 * fixed lots of header problems (especially Linux/GNU specific)
5110 * dynamic loader preserves all registers
5112 * Roland McGrath provided support for handling of auxiliary objects in
5113 the ELF dynamic loader.
5115 * support for parallel builds is improved
5119 * GNU extensions are no longer declared by default. To enable them you
5120 must define the macro `_GNU_SOURCE' in your program or compile with
5123 * The library has changed from using GNU ld symbol aliases to using weak
5124 symbols where available. The ELF object file format supports weak
5125 symbols; GNU ld also supports weak symbols in the a.out format. (There
5126 is also now support for other GNU ld extensions in ELF. Use the
5127 `--with-elf' option to configure to indicate you have ELF, and
5128 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5129 of many files which contained only symbol aliases, reducing the size of
5130 the source and the compiled library; many other files were renamed to
5131 less cryptic names previously occupied by the symbol alias files.
5132 There is a new header file <elf.h> for programs which operate on
5133 files in the ELF format.
5135 * Converted to Autoconf version 2, so `configure' has more options.
5136 Run `configure --help' to see the details.
5138 * The library can now be configured to build profiling, highly-optimized
5139 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5140 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5141 `configure' enable building these extra libraries. The shared library is
5142 built by default when using both ELF and GNU ld. When shared libraries
5143 are enabled, the new library `-ldl' is available for arbitrary run-time
5144 loading of shared objects; its interface is defined in <dlfcn.h>. The
5145 new header file <link.h> gives access to the internals of the run-time
5146 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5147 application of same name on other systems and it provides information
5148 about dynamically linked binaries.
5150 * The C library now provides the run-time support code for profiling
5151 executables compiled with `-pg'. Programs can control the profiling code
5152 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5153 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5154 the support for this file format was contributed by David Mosberger-Tang.
5156 * The math code has been replaced with a math library based on fdlibm from
5157 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5158 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5159 functions. The math functions now reside in a separate library, so
5160 programs using them will need to use `-lm' their linking commands.
5162 * John C. Bowman contributed optimized ix87 assembler inline functions.
5164 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5165 mechanism similar to that found in Solaris 2. This is now used for the
5166 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5167 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5168 file controls what services are used for each individual database. This
5169 works by loading shared libraries with names specified in `nsswitch.conf',
5170 so service modules can be changed or added at any time without even
5171 relinking any program. Currently there are the file, db, and NIS based
5172 NSS services available.
5174 * The new functions `strtoq' and `strtouq' parse integer values from
5175 strings, like `strtol' and `strtoul', but they return `long long int' and
5176 `unsigned long long int' values, respectively (64-bit quantities).
5178 * The new functions `strtof' and `strtold' parse floating-point values from
5179 strings, like `strtod', but they return `float' and `long double' values,
5180 respectively (on some machines `double' and `long double' are the same).
5182 * Ulrich Drepper has contributed new implementations of the floating-point
5183 printing and reading code used in the `printf' family of functions and
5184 `strtod', `strtof', and `strtold'. These new functions are perfectly
5185 accurate, and much faster than the old ones.
5187 * The implementation of the POSIX locale model was completely rewritten by
5188 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5189 to compile the POSIX locale definition.
5191 * The former dummy implementations of the strcoll and strxfrm function are
5192 now replaced by fully functional code contributed by Ulrich Drepper. The
5193 collation information comes from the POSIX locale definitions.
5195 * The new header <langinfo.h> defines an interface for accessing
5196 various locale-dependent data (using the locale chosen with `setlocale').
5198 * Ulrich Drepper has contributed a new suite of functions for operation on
5199 wide-character and multibyte-character strings, in <wchar.h>;
5200 and classification and case conversion of wide characters, in <wctype.h>.
5201 These new functions are conforming to the ISO C, Amendement 1 specification.
5203 * There is now a second implementation of the standard I/O library available.
5204 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5205 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5207 * You can now use positional parameter specifications in format strings
5208 for the `printf' and `scanf' families of functions. For example,
5209 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5210 ``Number 6, Mr Jones''. This is mainly useful when providing different
5211 format strings for different languages, whose grammars may dictate
5212 different orderings of the values being printed. To support this
5213 feature, the interface for `register_printf_handler' has changed; see
5214 the header file <printf.h> for details.
5216 * The `printf' and `scanf' families of functions now understand a new
5217 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5218 to group numbers as indicated by the locale; for `scanf' and friends, this
5219 says to accept as valid only a number with all the proper grouping
5220 separators in the right places. In the default "C" locale, numbers are
5221 not grouped; but locales for specific countries will define the usual
5222 conventions (i.e. separate thousands with `,' in the US locale).
5224 * The pgrp functions have been regularized, slightly incompatibly but much
5225 less confusingly. The core functions are now `getpgid' and `setpgid',
5226 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5227 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5228 provided for compatibility. There is no longer an incompatible `getpgrp'
5229 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5231 * The new header file <fts.h> and suite of functions simplify programs that
5232 operate on directory trees. This code comes from 4.4 BSD.
5234 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5235 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5236 NSS scheme used in glibc.
5238 * There is a new malloc debugging hook `__memalign_hook'.
5240 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5241 `unsigned int' in <sys/types.h>. These are for compatibility only and
5242 their use is discouraged.
5244 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5245 done differently, so that it works even without GNU ld.
5247 * New function `euidaccess' checks allowed access to a file like `access',
5248 but using the effective IDs instead of the real IDs.
5250 * The time zone data files have been updated for the latest and greatest
5251 local time conventions of the countries of the world.
5253 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5256 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5257 for formatting floating-point numbers. They are provided only for
5258 compatibility; new programs should use `sprintf' instead. There are
5259 also equivalent function for the `long double' floating-point type and
5260 all functions also exist in a reentrant form.
5262 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5263 functions for maintaining the login-record files (primarily of use to
5264 system programs such as `login'), and convenient functions for
5265 allocating and initializing a pseudo-terminal (pty) device.
5267 * Ulrich Drepper has contributed new support for System V style
5268 shared memory and IPC on systems that support it.
5270 * Ulrich Drepper has contributed several miscellaneous new functions found
5271 in System V: The `hsearch' family of functions provide an effective
5272 implementation of hash tables; `a64l' and `l64a' provide a very simple
5273 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5276 * Ulrich Drepper has contributed new reentrant counterparts for the
5277 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5279 * Ulrich Drepper has contributed new, highly-optimized versions of several
5280 string functions for the i486/Pentium family of processors.
5282 * Ulrich Drepper has updated the Linux-specific code, based largely
5283 on work done in Hongjiu Lu's version of GNU libc for Linux.
5284 The GNU library now supports Linux versions 2.0.10 and later,
5285 using the ELF object file format (i[3456]86-*-linux).
5287 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5289 * David Mosberger-Tang and Richard Henderson have ported the C library
5290 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5291 dynamic linking support for ELF/Alpha.
5293 * Richard Henderson contributed several Alpha optimized assembler function
5294 for arithmetic and string handling.
5296 * Ulrich Drepper has contributed a new set of message catalog functions to
5297 support multiple languages using the <libintl.h> interface, for use with
5298 his new package GNU gettext. Translation volunteers have contributed
5299 catalogs of the library's messages in Spanish, German, and Korean.
5301 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5302 program and the `catgets' function for reading the catalog files it
5303 creates. (The <libintl.h> interface is preferred; we include the
5304 <nl_types.h> interface using `catgets' only for source compatibility with
5305 programs already written to use it.)
5307 * New header file <values.h> gives SVID-compatible names for <limits.h>
5310 * Various new macros, declarations, and small header files for compatibility
5313 * New function `group_member' is a convenient way to check if a process has
5314 a given effective group ID.
5316 * When using GCC 2.7 and later, the socket functions are now declared in a
5317 special way so that passing an argument of type `struct sockaddr_in *',
5318 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5319 `struct sockaddr *' type, does not generate a type-clash warning.
5321 * New function `error' declared in header file <error.h> is a convenient
5322 function for printing error messages and optionally exiting; this is the
5323 canonical function used in GNU programs. The new functions `err', `warn',
5324 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5325 doing the same thing.
5327 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5328 POSIX.2 `glob' function to do ~ and {...} expansion.
5330 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5331 `clearenv' which is used in POSIX.9 is also available.
5333 * New function `getsid' returns session ID number on systems that support it.
5335 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5336 files <db.h> and <mpool.h> provide a rich set of functions for several
5337 types of simple databases stored in memory and in files, and <ndbm.h> is
5338 an old `ndbm'-compatible interface using the `db' functions. Link with
5339 `-ldb' to get these functions.
5341 * New macro `strdupa' copies a string like `strdup', but uses local stack
5342 space from `alloca' instead of dynamic heap space from `malloc'.
5344 * New function `strnlen' is like `strlen' but searches only a given maximum
5345 number of characters for the null terminator. `stpncpy', `strndup' and
5346 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5349 * New function `statfs' in header <sys/statfs.h>.
5351 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5352 provide convenient functions for operating on blocks of null-terminated
5355 * A new suite of functions in <utmp.h> handle all the details of reading
5356 and writing the utmp file.
5358 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5361 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5362 completely POSIX compliant and also implemented the extended functionality
5363 to handle alternate digit representation and alternate era date formats.
5365 * Ulrich Drepper provided an implementation of the `strptime' function
5366 defined in XPG4.2 which transforms a string into a `struct tm' value.
5368 * Paul Eggert provided the tzselect shell script as part of the timezone
5369 code. The shell script makes it easy to select the correct timezone
5372 * The implementation of the malloc family of functions is completely replaced
5373 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5374 The implementation uses the mmap function (if available) and it is
5375 optimized for the use in multi threaded programs.
5377 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5378 functions. This new functionality is usable by specifying a special
5379 salt string and it is compatible with implementation on *BSD systems.
5381 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5382 `getsubopt' to handle second level command line options, `bsd_signal'
5383 to access BSD style `signal' functionality, the obsolete `regexp' style
5386 * the `lchown' function is available on system which support this
5389 * The implementation of the shadow password handling function was contributed
5392 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5394 * POSIX.1g support was added. The <sys/select.h> header is available,
5395 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5396 implementation of `getaddrinfo'.
5400 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5402 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5403 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5405 * The new function `daemon' from 4.4 BSD is useful for server programs that
5406 want to put themselves in the background.
5408 * Joel Sherrill has contributed support for several standalone boards that
5409 run without an operating system.
5411 * `printf', `scanf' and friends now accept a `q' type modifier for long
5412 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5414 * All of the code taken from BSD (notably most of the math and networking
5415 routines) has been updated from the BSD 4.4-Lite release.
5417 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5419 * The new functions `getdomainname' and `setdomainname' fetch or change the
5420 YP/NIS domain name. These are system calls which exist on systems which
5423 * The time zone data files have been updated for the latest international
5426 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5427 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5431 * The C library now includes support for Sun RPC, from Sun's free
5432 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5433 are included. (There is still no support for YP.)
5435 * Tom Quinn has contributed a port of the C library to SGI machines running
5436 Irix 4 (mips-sgi-irix4).
5438 * The new `lockf' function is a simplified interface to the locking
5439 facilities of `fcntl', included for compatibility.
5441 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5443 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5445 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5448 * The error message printed by `assert' for a failed assertion now includes
5449 the name of the program (if using GNU ld) and the name of the calling
5450 function (with versions of GCC that support this).
5452 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5454 * The library now includes the <sys/mman.h> header file and memory
5455 management functions `mmap', `munmap', `mprotect', `msync', and
5456 `madvise', on systems that support those facilities.
5458 * The interface for `mcheck' has changed slightly: the function called to
5459 abort the program when an allocation inconsistency is detected now takes
5460 an argument that indicates the type of failure. The new function
5461 `mprobe' lets you request a consistency check for a particular block at
5462 any time (checks are normally done only when you call `free' or `realloc'
5465 * It is now possible to easily cross-compile the C library, building on one
5466 system a library to run on another machine and/or operating system. All
5467 you need to do is set the variable `HOST_CC' in `configparms' to the
5468 native compiler for programs to run on the machine you are building on (a
5469 few generator programs are used on Unix systems); set `CC' to the
5472 * The new function `fexecve' (only implemented on the GNU system) executes
5473 a program file given a file descriptor already open on the file.
5477 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5478 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5480 * You can set the variable `libprefix' in `configparms' to specify a prefix
5481 to be prepended to installed library files; this makes it easy to install
5482 the GNU C library to be linked as `-lgnuc' or whatever.
5484 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5485 copies a limited number of characters from a string, and returns the
5486 address of the last character written.
5488 * You no longer need to check for whether the installed `stddef.h' is
5489 compatible with the GNU C library. configure now checks for you.
5491 * You can now define a per-stream `fileno' function to convert the
5492 stream's cookie into an integral file descriptor.
5494 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5495 allocates zero bytes of storage, and returns a unique pointer which
5496 you can pass to `realloc' or `free'. The behavior is undefined if
5497 you dereference this pointer.
5499 * The C library now runs on Sony NEWS m68k machines running either
5500 NewsOS 3 or NewsOS 4.
5502 * The new `syscall' function is a system-dependent primitive function
5503 for invoking system calls. It has the canonical behavior on Unix
5504 systems, including unreliable return values for some calls (such as
5505 `pipe', `fork' and `getppid').
5507 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5508 to `EAGAIN', which is the preferred name. On systems whose kernels
5509 use two distinct codes, the C library now translates EWOULDBLOCK to
5510 EAGAIN in every system call function.
5514 * The GNU C Library Reference Manual is now distributed with the library.
5515 `make dvi' will produce a DVI file of the printed manual.
5516 `make info' will produce Info files that you can read on line using C-h i
5517 in Emacs or the `info' program.
5518 Please send comments on the manual to bug-glibc-manual@gnu.org.
5520 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5522 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5524 * Jason Merrill has contributed a port to the Sequent Symmetry running
5525 Dynix version 3 (i386-sequent-dynix).
5527 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5528 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5530 * New function `memory_warnings' lets you arrange to get warnings when
5531 malloc is running out of memory to allocate, like Emacs gives you.
5533 * The C library now contains the relocating allocator used in Emacs 19 for
5534 its editing buffers. This allocator (ralloc) minimizes allocation
5535 overhead and fragmentation by moving allocated regions around whenever it
5536 needs to. You always refer to a ralloc'd region with a "handle" (a
5537 pointer to a pointer--an object of type `void **').
5539 * There is a new `printf' format: `%m' gives you the string corresponding
5540 to the error code in `errno'.
5542 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5543 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5544 pass, the `a' modifier says to fill in a `char **' you pass with a
5547 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5548 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5549 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5551 * `mkstemp' is a traditional Unix function to atomically create and open a
5552 uniquely-named temporary file.
5556 * The standard location for the file that says what the local timezone is
5557 has changed again. It is now `/usr/local/etc/localtime' (or more
5558 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5560 * The distribution no longer contains any files with names longer than 14
5563 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5564 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5566 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5570 * The configuration process has changed quite a bit. The `configure'
5571 script is now used just like the configuration scripts for other GNU
5572 packages. The `sysdeps' directory hierarchy is much rearranged.
5573 The file `INSTALL' explains the new scheme in detail.
5575 * The header files no longer need to be processed into ANSI C and
5576 traditional C versions. There is just one set of files to install, and
5577 it will work with ANSI or old C compilers (including `gcc -traditional').
5579 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5580 MIPS DECStation running Ultrix 4.
5582 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5583 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5584 made itself into a shared library.
5586 * Yet further improved support for the i386, running 4.3 BSD-like systems
5587 (such as Mach 3 with the Unix single-server), or System V.
5589 * New function `strncasecmp' to do case-insensitive string comparison
5590 with limited length.
5592 * New function `strsep' is a reentrant alternative to `strtok'.
5594 * New functions `scandir' and `alphasort' for searching directories.
5596 * New function `setenv' is a better interface to `putenv'.
5598 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5599 function for traversing a directory tree.
5601 * The GNU obstack package is now also part of the C library.
5602 The new function `open_obstack_stream' creates a stdio stream that
5603 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5604 formatted output directly to an obstack.
5606 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5607 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5609 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5611 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5612 things to your strings.
5614 * There are some new test programs: test-fseek, testmb, and testrand.
5616 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5617 These ports are not finished, but are a good starting place for really
5618 supporting those systems.
5620 * `/etc/localtime' is now the standard location for the file that says what
5621 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5622 This follows the general principle that `/etc' is the place for all local
5623 configuration files.
5625 * The C library header files now use `extern "C"' when used by the C++
5626 compiler, so the C library should now work with C++ code.
5628 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5629 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5632 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5633 function which uses the `merge sort' algorithm, and is said to be
5634 significantly faster than the old GNU `qsort' function. Merge sort is
5635 now the standard `qsort' function. The new algorithm can require a lot
5636 of temporary storage; so, the old sorting function is called when the
5637 required storage is not available.
5639 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5640 provides the Unix `crypt' function, plus some other entry points.
5642 * The code and header files taken from 4.4 BSD have been updated with the
5643 latest files released from Berkeley.
5645 ----------------------------------------------------------------------
5646 Copyright information:
5648 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5650 Permission is granted to anyone to make or distribute verbatim copies
5651 of this document as received, in any medium, provided that the
5652 copyright notice and this permission notice are preserved,
5653 thus giving the recipient permission to redistribute in turn.
5655 Permission is granted to distribute modified versions
5656 of this document, or of portions of it,
5657 under the above conditions, provided also that they
5658 carry prominent notices stating who last changed them.
5661 version-control: never