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 * Unicode 12.0.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.0.0, using
14 generator scripts contributed by Mike FABIAN (Red Hat).
16 * The dynamic linker accepts the --preload argument to preload shared
17 objects, in addition to the LD_PRELOAD environment variable.
19 * On Linux, the gettid function has been added.
21 * Minguo (Republic of China) calendar support has been added as an
22 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
25 * The entry for the new Japanese era has been added for ja_JP locale.
27 Deprecated and removed features, and other changes affecting compatibility:
29 * The functions clock_gettime, clock_getres, clock_settime,
30 clock_getcpuclockid, clock_nanosleep were removed from the librt library
31 for new applications (on architectures which had them). Instead, the
32 definitions in libc will be used automatically, which have been available
35 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
36 and <sys/stropts.h> have been removed.
38 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
39 resolver flag (deprecated in glibc 2.25) have been removed.
41 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
42 resolver have been removed from <resolv.h>.
44 Changes to build and runtime requirements:
46 * GCC 6.2 or later is required to build the GNU C Library.
48 Older GCC versions and non-GNU compilers are still supported when
49 compiling programs that use the GNU C Library.
51 Security related changes:
53 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
54 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
55 has undefined behavior. On x32, the size_t argument may be passed
56 in the lower 32 bits of the 64-bit RDX register with non-zero upper
57 32 bits. When it happened with the sign bit of RDX register set,
58 memcmp gave the wrong result since it treated the size argument as
59 zero. Reported by H.J. Lu.
61 CVE-2019-9169: Attempted case-insensitive regular-expression match
62 via proceed_next_node in posix/regexec.c leads to heap-based buffer
63 over-read. Reported by Hongxu Chen.
65 The following bugs are resolved with this release:
67 [The release manager will add the list generated by
68 scripts/list-fixed-bugs.py just before the release.]
75 * The getcpu wrapper function has been added, which returns the currently
76 used CPU and NUMA node. This function is Linux-specific.
78 * A new convenience target has been added for distribution maintainers
79 to build and install all locales as directories with files. The new
80 target is run by issuing the following command in your build tree:
81 'make localedata/install-locale-files', with an optional DESTDIR
82 to set the install root if you wish to install into a non-default
85 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
87 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
88 for _GNU_SOURCE, to match BSD environments.
90 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
91 indicates that it will abort the transaction prior to entering the kernel
92 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
93 suspended, and this caused some undefined side-effects issues by aborting
94 transactions manually. Glibc avoided it by abort transactions manually on
95 each syscall, but it lead to performance issues on newer kernels where the
96 HTM state is saved and restore lazily (the state being saved even when the
97 process actually does not use HTM).
99 * The functions posix_spawn_file_actions_addchdir_np and
100 posix_spawn_file_actions_addfchdir_np have been added, enabling
101 posix_spawn and posix_spawnp to run the new process in a different
102 directory. These functions are GNU extensions. The function
103 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
106 * The popen and system do not run atfork handlers anymore (BZ#17490).
107 Although it is a possible POSIX violation, the POSIX rationale in
108 pthread_atfork documentation regarding atfork handlers is to handle
109 inconsistent mutex state after a fork call in a multi-threaded process.
110 In both popen and system there is no direct access to user-defined mutexes.
112 * Support for the C-SKY ABIV2 running on Linux has been added. This port
113 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
115 - C-SKY ABIV2 soft-float little-endian
116 - C-SKY ABIV2 hard-float little-endian
118 * strftime's default formatting of a locale's alternative year (%Ey)
119 has been changed to zero-pad the year to a minimum of two digits,
120 like "%y". This improves the display of Japanese era years during
121 the first nine years of a new era, and is expected to be harmless
122 for all other locales (only Japanese locales regularly have
123 alternative year numbers less than 10). Zero-padding can be
124 overridden with the '_' or '-' flags (which are GNU extensions).
126 * As a GNU extension, the '_' and '-' flags can now be applied to
127 "%EY" to control how the year number is formatted; they have the
128 same effect that they would on "%Ey".
130 Deprecated and removed features, and other changes affecting compatibility:
132 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
133 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
135 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
136 in <sys/procfs.h>, has been corrected to match the type actually used by
137 the Linux kernel. This affects the size and layout of that structure on
138 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
140 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
141 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
142 defined in <sys/procfs.h>, has been corrected to match the type actually
143 used by the Linux kernel. This affects the size and layout of those
146 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
147 meant to scan a string and allocate space for it with malloc, is now
148 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
149 defined. This extension conflicts with C99's use of '%a' to scan a
150 hexadecimal floating-point number, which is now available to programs
151 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
153 POSIX.1-2008 includes the feature of allocating a buffer for string input
154 with malloc, using the modifier letter 'm' instead. Programs using
155 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
156 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
157 C99 '%a' no longer need to avoid _GNU_SOURCE.
159 GCC's -Wformat warnings can detect most uses of this extension, as long
160 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
161 __attribute__ ((format (scanf, ...))).
163 Changes to build and runtime requirements:
165 * Python 3.4 or later is required to build the GNU C Library.
167 * On most architectures, GCC 5 or later is required to build the GNU C
168 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
170 Older GCC versions and non-GNU compilers are still supported when
171 compiling programs that use the GNU C Library.
173 Security related changes:
175 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
176 denial of service due to resource exhaustion when processing getaddrinfo
177 calls with crafted host names. Reported by Guido Vranken.
179 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
180 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
181 happened, accessing the 32-bit size_t value as the full 64-bit register
182 in the assembly string/memory functions would cause a buffer overflow.
185 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
186 addresses with arbitrary trailing characters, potentially leading to data
187 or command injection issues in applications.
189 The following bugs are resolved with this release:
191 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
192 [10496] localedata: 12h time representation in multiple locales faulty
193 [10797] localedata: it_IT locale numeric does not have a separator for
195 [11319] libc: dprintf doesn't handle errors properly
196 [16346] time: mktime: potentially unsafe use of localtime_offset
197 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
199 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
200 posix_spawn_file_actions_addfchdir_np
201 [17426] localedata: Indian locales: set the correct date format
202 [17490] stdio: popen should not invoke atfork handlers
203 [17783] libc: TIOCSER_TEMT conditions inconsistent
204 [18040] regex: use-after-free in regexec/get_subexp
205 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
206 [20018] network: getaddrinfo should reject IP addresses with trailing
207 characters (CVE-2016-10739)
208 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
209 [20271] libc: Missing "\n" in __libc_fatal calls
210 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
211 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
212 pointer argument is non-NULL
213 [21037] stdio: open_memstream and freopen
214 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
215 [21716] time: Crash in glibc's mktime in low-memory situations
216 [22834] stdio: Subprocess forked by popen may crash in Linux when
217 multithreads call popen
218 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
219 and pthread_create fails.
220 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
221 [23125] libc: riscv64: endless loop when throwing an exception from a
223 [23275] nptl: Race in pthread_mutex_lock while promoting to
224 PTHREAD_MUTEX_ELISION_NP.
225 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
227 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
229 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
231 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
232 [23509] dynamic-link: CET enabled glibc is incompatible with the older
234 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
235 [23521] nss: get_next_alias nss_files file stream leak
236 [23538] nptl: Hang in pthread_cond_broadcast
237 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
238 [23578] regex: Invalid memory access if regex pattern contains NUL byte
239 [23579] libc: Errors misreported in preadv2
240 [23597] build: support/test-container.c doesn't work with different
242 [23603] time: mktime signed integer overflow on large timestamps
243 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
244 [23614] libc: powerpc: missing CFI register information in __mpn_*
246 [23637] string: Generic strstr/strcasestr fails with huge needles
247 [23640] libc: no way to easily clear FD_CLOEXEC in
248 posix_spawn_file_actions_adddup2()
249 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
251 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
253 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
254 [23689] libc: Bug in documentation for rusage.ru_ixrss in
255 bits/types/struct_rusage.h
256 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
258 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
260 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
261 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
262 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
264 [23724] localedata: Albanian date formats are incorrect
265 [23735] math: libnldbl_nonshared.a references internal libm symbols
266 [23740] localedata: kl_GL: Month names and date formats need update
267 [23744] regex: regex refactorings to remove BE, avoid duplication
268 [23745] time: mktime fix for Gnulib + coreutils
269 [23758] time: Improve the width of alternate representation for year in
271 [23783] libc: [mips] Missing CMSPAR bits/termios.h
272 [23789] time: mktime does not set errno on failure
273 [23791] localedata: Wrong monetary format for ca_ES locale
274 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
275 [23794] locale: c16rtomb does not handle surrogate pairs
276 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
277 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
278 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
279 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
280 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
281 [23862] libc: [sh] missing kernel-features.h undefines
282 [23864] libc: [riscv] missing kernel-features.h undefines
283 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
284 [23907] malloc: Incorrect double-free malloc tcache check disregards
286 [23913] libc: off-by-one in function maybe_script_execute in
287 sysdeps/posix/spawni.c
288 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
289 [23923] locale: Add --no-hard-links option to localedef
290 [23927] network: Linux if_nametoindex() does not close descriptor
292 [23961] math: powf can overflow to inf without setting errno in non-
293 nearest rounding mode
294 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
295 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
296 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
297 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
298 [24011] localedata: Fixed small type in comment for locale bs_BA
299 [24018] libc: gettext() may return NULL
300 [24022] build: riscv build failure with Linux kernel 4.20-rc7
301 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
302 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
304 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
305 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
307 [24046] localedata: en_US locale doesn't define date_fmt
308 [24063] manual: @var{errno} should be @code{errno}
309 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
310 [24088] libc: VSCR field is not being correctly read in ucontext_t on
312 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
314 [24097] string: Can't use 64-bit register for size_t in assembly codes for
316 [24110] hurd: SS_DISABLE never set in stack_t value returned by
318 [24112] network: Do not send DNS queries for non-host names (where all
319 answers will be rejected)
320 [24130] libc: alpha __remqu corrupts $f3 register
327 * The localization data for ISO 14651 is updated to match the 2016
328 Edition 4 release of the standard, this matches data provided by
329 Unicode 9.0.0. This update introduces significant improvements to the
330 collation of Unicode characters. This release deviates slightly from
331 the standard in that the collation element ordering for lowercase and
332 uppercase LATIN script characters is adjusted to ensure that regular
333 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
334 is not matched by [a-z]. With the update many locales have been
335 updated to take advantage of the new collation information. The new
336 collation information has increased the size of the compiled locale
337 archive or binary locales.
339 * The GNU C Library can now be compiled with support for Intel CET, AKA
340 Intel Control-flow Enforcement Technology. When the library is built
341 with --enable-cet, the resulting glibc is protected with indirect
342 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
343 compatible with all existing executables and shared libraries. This
344 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
345 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
346 capable of multi-byte NOPs, like x86-64 processors as well as Intel
347 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
348 x86_64 and x32 on non-CET processors. --enable-cet has been tested
349 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
352 * The GNU C Library now has correct support for ABSOLUTE symbols
353 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
354 relocated incorrectly or in some cases discarded. The GNU linker can
355 make use of the newer semantics, but it must communicate it to the
356 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
357 field) to indicate such support is required.
359 * Unicode 11.0.0 Support: Character encoding, character type info, and
360 transliteration tables are all updated to Unicode 11.0.0, using
361 generator scripts contributed by Mike FABIAN (Red Hat).
363 * <math.h> functions that round their results to a narrower type are added
364 from TS 18661-1:2014 and TS 18661-3:2015:
366 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
369 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
372 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
375 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
378 * Two grammatical forms of month names are now supported for the following
379 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
380 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
381 support two grammatical forms in abbreviated month names: Catalan, Greek,
384 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
385 include the support for two grammatical forms of month names.
387 * Building and running on GNU/Hurd systems now works without out-of-tree
390 * The renameat2 function has been added, a variant of the renameat function
391 which has a flags argument. If the flags are zero, the renameat2 function
392 acts like renameat. If the flag is not zero and there is no kernel
393 support for renameat2, the function will fail with an errno value of
394 EINVAL. This is different from the existing gnulib function renameatu,
395 which performs a plain rename operation in case of a RENAME_NOREPLACE
396 flags and a non-existing destination (and therefore has a race condition
397 that can clobber the destination inadvertently).
399 * The statx function has been added, a variant of the fstatat64
400 function with an additional flags argument. If there is no direct
401 kernel support for statx, glibc provides basic stat support based on
402 the fstatat64 function.
404 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
405 library if installed. libidn2 version 2.0.5 or later is recommended. If
406 libidn2 is not available, internationalized domain names are not encoded
407 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
408 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
409 with an encoding error.) Flags which used to change the IDN encoding and
410 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
411 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
412 deprecated. They no longer have any effect.
414 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
415 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
416 range of ELF gABI expressions including such constructs as
417 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
418 have been further restricted, and where in the past a dynamic string
419 token sequence may have been interpreted as a literal string it will
420 now cause a load failure. These load failures were always considered
421 unspecified behaviour from the perspective of the dynamic loader, and
422 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
423 results in a load failure now.
425 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
426 implementation includes all the standard functions provided by
429 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
430 thrd_detach, thrd_exit, and thrd_join for thread management.
432 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
433 mtx_destroy for mutual exclusion.
435 - call_once for function call synchronization.
437 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
438 cnd_wait for conditional variables.
440 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
442 Application developers must link against libpthread to use ISO C threads.
444 Deprecated and removed features, and other changes affecting compatibility:
446 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
447 installed. Software that was using either header should be updated to
448 use standard <stdio.h> interfaces instead.
450 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
451 This was never required by the C standard, and the macros just expanded
452 to call alternative names for the same functions. If you hoped getc and
453 putc would provide performance improvements over fgetc and fputc, instead
454 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
455 necessary, flockfile and funlockfile.
457 * All stdio functions now treat end-of-file as a sticky condition. If you
458 read from a file until EOF, and then the file is enlarged by another
459 process, you must call clearerr or another function with the same effect
460 (e.g. fseek, rewind) before you can read the additional data. This
461 corrects a longstanding C99 conformance bug. It is most likely to affect
462 programs that use stdio to read interactive input from a terminal.
465 * The macros 'major', 'minor', and 'makedev' are now only available from
466 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
467 headers that happen to include <sys/types.h>. These macros are rarely
468 used, not part of POSIX nor XSI, and their names frequently collide with
469 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
472 <sys/sysmacros.h> is a GNU extension. Portable programs that require
473 these macros should first include <sys/types.h>, and then include
474 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
476 * The tilegx*-*-linux-gnu configurations are no longer supported.
478 * The obsolete function ustat is no longer available to newly linked
479 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
480 function has been deprecated in favor of fstatfs and statfs.
482 * The obsolete function nfsservctl is no longer available to newly linked
483 binaries. This function was specific to systems using the Linux kernel
484 and could not usefully be used with the GNU C Library on systems with
485 version 3.1 or later of the Linux kernel.
487 * The obsolete function name llseek is no longer available to newly linked
488 binaries. This function was specific to systems using the Linux kernel
489 and was not declared in a header. Programs should use the lseek64 name
490 for this function instead.
492 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
493 getaddrinfo and getnameinfo functions have been deprecated. The behavior
494 previously selected by them is now always enabled.
496 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
497 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
498 restriction (rejecting '_' in host names, among other things) has been
499 removed, for increased compatibility with non-IDN name resolution.
501 * The fcntl function now have a Long File Support variant named fcntl64. It
502 is added to fix some Linux Open File Description (OFD) locks usage on non
503 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
504 fcntl and LFS support is handled transparently. Also for Linux, the OFD
505 locks act as a cancellation entrypoint.
507 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
508 ecb_crypt, and des_setparity are no longer available to newly linked
509 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
510 longer installed. These functions encrypted and decrypted data with the
511 DES block cipher, which is no longer considered secure. Software that
512 still uses these functions should switch to a modern cryptography library,
515 * Reflecting the removal of the encrypt and setkey functions above, the
516 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
517 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
520 * The obsolete function fcrypt is no longer available to newly linked
521 binaries. It was just another name for the standard function crypt,
522 and it has not appeared in any header file in many years.
524 * We have tentative plans to hand off maintenance of the passphrase-hashing
525 library, libcrypt, to a separate development project that will, we hope,
526 keep up better with new passphrase-hashing algorithms. We will continue
527 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
528 'crypt_r' should not need to change at all; however, distributions will
529 need to install <crypt.h> and libcrypt from a separate project.
531 In this release, if the configure option --disable-crypt is used, glibc
532 will not install <crypt.h> or libcrypt, making room for the separate
533 project's versions of these files. The plan is to make this the default
534 behavior in a future release.
536 Changes to build and runtime requirements:
538 GNU make 4.0 or later is now required to build glibc.
540 Security related changes:
542 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
543 been fixed by removing the glibc-internal IDNA implementation and using
544 the system-provided libidn2 library instead. Originally reported by Hanno
545 Böck and Christian Weisgerber.
547 CVE-2017-18269: An SSE2-based memmove implementation for the i386
548 architecture could corrupt memory. Reported by Max Horn.
550 CVE-2018-11236: Very long pathname arguments to realpath function could
551 result in an integer overflow and buffer overflow. Reported by Alexey
554 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
555 architecture could write beyond the target buffer, resulting in a buffer
556 overflow. Reported by Andreas Schwab.
558 The following bugs are resolved with this release:
560 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
561 [6889] manual: 'PWD' mentioned but not specified
562 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
563 when __WORDSIZE != 64
564 [13762] regex: re_search etc. should return -2 on memory exhaustion
565 [13888] build: /tmp usage during testing
566 [13932] math: dbl-64 pow unexpectedly slow for some inputs
567 [14092] nptl: Support C11 threads
568 [14095] localedata: Review / update collation data from Unicode / ISO
570 [14508] libc: -Wformat warnings
571 [14553] libc: Namespace pollution loff_t in sys/types.h
572 [14890] libc: Make NT_PRFPREG canonical.
573 [15105] libc: Extra PLT references with -Os
574 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
576 [16335] manual: Feature test macro documentation incomplete and out of
578 [16552] libc: Unify umount implementations in terms of umount2
579 [17082] libc: htons et al.: statement-expressions prevent use on global
580 scope with -O1 and higher
581 [17343] libc: Signed integer overflow in /stdlib/random_r.c
582 [17438] localedata: pt_BR: wrong d_fmt delimiter
583 [17662] libc: please implement binding for the new renameat2 syscall
584 [17721] libc: __restrict defined as /* Ignore */ even in c11
585 [17979] libc: inconsistency between uchar.h and stdint.h
586 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
587 [18023] libc: extend_alloca is broken (questionable pointer comparison,
588 horrible machine code)
589 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
591 [18471] libc: llseek should be a compat symbol
592 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
594 [18991] nss: nss_files skips large entry in database
595 [19239] libc: Including stdlib.h ends up with macros major and minor being
597 [19463] libc: linknamespace failures when compiled with -Os
598 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
599 [19527] locale: Normalized charset name not recognized by setlocale
600 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
601 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
603 [19728] network: out of bounds stack read in libidn function
604 idna_to_ascii_4i (CVE-2016-6261)
605 [19729] network: out of bounds heap read on invalid utf-8 inputs in
606 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
607 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
609 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
610 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
611 [20419] dynamic-link: files with large allocated notes crash in
613 [20530] libc: bswap_16 should use __builtin_bswap16() when available
614 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
615 [20980] manual: CFLAGS environment variable replaces vital options
616 [21163] regex: Assertion failure in pop_fail_stack when executing a
617 malformed regexp (CVE-2015-8985)
618 [21234] manual: use of CFLAGS makes glibc detect no optimization
619 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
620 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
621 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
622 [21508] locale: intl/tst-gettext failure with latest msgfmt
623 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
624 [21812] network: getifaddrs() returns entries with ifa_name == NULL
625 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
627 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
629 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
630 [22247] network: Integer overflow in the decode_digit function in
631 puny_decode.c in libidn (CVE-2017-14062)
632 [22342] nscd: NSCD not properly caching netgroup
633 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
634 [22550] localedata: es_ES locale (and other es_* locales): collation
635 should treat ñ as a primary different character, sync the collation
636 for Spanish with CLDR
637 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
638 by gcc configured with --enable-default-pie
639 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
640 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
641 crossing 2GB threshold (CVE-2017-18269)
642 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
644 [22735] time: Misleading typo in time.h source comment regarding
646 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
647 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
648 `__assert_perror_fail ()' to `__assert_fail_base ()'
649 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
651 [22786] libc: Stack buffer overflow in realpath() if input size is close
652 to SSIZE_MAX (CVE-2018-11236)
653 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
654 through an absolute DT_NEEDED path
655 [22792] build: tcb-offsets.h dependency dropped
656 [22797] libc: pkey_get() uses non-reserved name of argument
657 [22807] libc: PTRACE_* constants missing for powerpc
658 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
659 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
660 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
661 [22848] localedata: ca_ES: update date definitions from CLDR
662 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
663 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
664 [22896] localedata: Update locale data for an_ES
665 [22902] math: float128 test failures with GCC 8
666 [22918] libc: multiple common of `__nss_shadow_database'
667 [22919] libc: sparc32: backtrace yields infinite backtrace with
669 [22926] libc: FTBFS on powerpcspe
670 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
672 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
673 [22947] libc: FAIL: misc/tst-preadvwritev2
674 [22963] localedata: cs_CZ: Add alternative month names
675 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
676 [22996] localedata: change LC_PAPER to en_US in es_BO locale
677 [22998] dynamic-link: execstack tests are disabled when SELinux is
679 [23005] network: Crash in __res_context_send after memory allocation
681 [23007] math: strtod cannot handle -nan
682 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
683 [23036] regex: regex equivalence class regression
684 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
685 [23069] libc: sigaction broken on riscv64-linux-gnu
686 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
687 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
688 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
689 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
690 and libc build with -Os)
691 [23140] localedata: More languages need two forms of month names
692 [23145] libc: _init/_fini aren't marked as hidden
693 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
694 [23171] math: C++ iseqsig for long double converts arguments to double
695 [23178] nscd: sudo will fail when it is run in concurrent with commands
696 that changes /etc/passwd
697 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
699 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
700 [23208] localedata: New locale - Lower Sorbian (dsb)
701 [23233] regex: Memory leak in build_charclass_op function in file
703 [23236] stdio: Harden function pointers in _IO_str_fields
704 [23250] nptl: Offset of __private_ss differs from GCC
705 [23253] math: tgamma test suite failures on i686 with -march=x86-64
706 -mtune=generic -mfpmath=sse
707 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
709 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
710 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
712 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
713 [23277] math: nan function should not have const attribute
714 [23279] math: scanf and strtod wrong for some hex floating-point
715 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
717 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
718 [23303] build: undefined reference to symbol
719 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
720 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
722 [23313] stdio: libio vtables validation and standard file object
724 [23329] libc: The __libc_freeres infrastructure is not properly run across
726 [23349] libc: Various glibc headers no longer compatible with
728 [23351] malloc: Remove unused code related to heap dumps and malloc
730 [23363] stdio: stdio-common/tst-printf.c has non-free license
731 [23396] regex: Regex equivalence regression in single-byte locales
732 [23422] localedata: oc_FR: More updates of locale data
733 [23442] build: New warning with GCC 8
734 [23448] libc: Out of bounds access in IBM-1390 converter
735 [23456] libc: Wrong index_cpu_LZCNT
736 [23458] build: tst-get-cpu-features-static isn't added to tests
737 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
739 [23467] dynamic-link: x86/CET: A property note parser bug
746 * The GNU C Library can now be compiled with support for building static
747 PIE executables (See --enable-static-pie in INSTALL). These static PIE
748 executables are like static executables but can be loaded at any address
749 and provide additional security hardening benefits at the cost of some
750 memory and performance. When the library is built with --enable-static-pie
751 the resulting libc.a is usable with GCC 8 and above to create static PIE
752 executables using the GCC option '-static-pie'. This feature is currently
753 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
754 aarch64 with binutils 2.30 or later.
756 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
757 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
760 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
762 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
764 * In order to support faster and safer process termination the malloc API
765 family of functions will no longer print a failure address and stack
766 backtrace after detecting heap corruption. The goal is to minimize the
767 amount of work done after corruption is detected and to avoid potential
768 security issues in continued process execution. Reducing shutdown time
769 leads to lower overall process restart latency, so there is benefit both
770 from a security and performance perspective.
772 * The abort function terminates the process immediately, without flushing
773 stdio streams. Previous glibc versions used to flush streams, resulting
774 in deadlocks and further data corruption. This change also affects
775 process aborts as the result of assertion failures.
777 * On platforms where long double has the IEEE binary128 format (aarch64,
778 alpha, mips64, riscv, s390 and sparc), the math library now implements
779 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
780 These are the same interfaces added in version 2.26 for some platforms where
781 this format is supported but is not the format of long double.
783 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
784 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
785 implements interfaces for that type, as defined by ISO/IEC TS
786 18661-3:2015. These are corresponding interfaces to those supported for
789 * The math library now implements interfaces for the _Float32, _Float64 and
790 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
791 corresponding interfaces to those supported for _Float128.
793 * glibc now implements the memfd_create and mlock2 functions on Linux.
795 * Support for memory protection keys was added. The <sys/mman.h> header now
796 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
799 * The copy_file_range function was added.
801 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
803 * The ldconfig utility now processes `include' directives using the C/POSIX
804 collation ordering. Previous glibc versions used locale-specific
805 ordering, the change might break systems that relied on that.
807 * Support for two grammatical forms of month names has been added.
808 In a call to strftime, the "%B" and "%b" format specifiers will now
809 produce the grammatical form required when the month is used as part
810 of a complete date. New "%OB" and "%Ob" specifiers produce the form
811 required when the month is named by itself. For instance, in Greek
812 and in many Slavic and Baltic languages, "%B" will produce the month
813 in genitive case, and "%OB" will produce the month in nominative case.
815 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
816 are all valid and will all accept any known form of month
817 name---standalone or complete, abbreviated or full. In a call to
818 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
819 the strings used by "%B" and "%b", respectively. New query
820 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
821 used by "%OB" and "%Ob", respectively.
823 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
824 define the strings for %OB and %Ob, respectively; these have the
825 same syntax as "mon" and "abmon". These arrays are optional; if they
826 are not provided then they have the same content as "mon" and "abmon",
829 These features are provided for locales which define "alt_mon" and/or
830 "ab_alt_mon" in their locale source data. This release includes such
831 alternative month name data for the following languages: Belarusian,
832 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
834 This feature is currently a GNU extension, but it is expected to
835 be added to the next revision of POSIX, and it is also already
836 available on some BSD-derived operating systems.
838 This feature will cause existing statically compiled applications
839 to fail to load locales and fall back to the builtin C/POSIX locales.
840 See notes below for other changes affecting compatibility.
842 * Support for the RISC-V ISA running on Linux has been added. This port
843 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
844 for the following ISA and ABI pairs:
850 Deprecated and removed features, and other changes affecting compatibility:
852 * Statically compiled applications attempting to load locales compiled for the
853 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
854 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
855 support for two grammatical forms of the month names, also extends the locale
856 data binary format. Static applications needing locale support must be
857 recompiled to match the runtime and data they are deployed with. In some
858 distributions there is an upgrade window where dynamically linked applications
859 may use a new library but the old locale data and also fall back to the
860 builtin C/POSIX locales; restarting the application process is sufficient to
863 * Support for statically linked applications which call dlopen is deprecated
864 and will be removed in a future version of glibc. Applications which call
865 dlopen need to be linked dynamically instead.
867 * Support for old programs which use internal stdio data structures and
868 functions is deprecated. This includes programs which use the C++ streams
869 provided by libstdc++ in GCC 2.95. Programs which use the internal
870 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
871 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
872 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
873 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
874 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
875 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
876 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
877 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
878 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
879 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
880 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
881 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
882 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
883 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
884 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
885 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
886 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
887 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
888 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
889 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
890 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
891 future version of glibc. Unlike other symbol removals, these old
892 applications will not be supported using compatibility symbols.
894 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
895 defined by <sys/ptrace.h>.
897 * libm no longer supports SVID error handling (calling a user-provided
898 matherr function on error) or the _LIB_VERSION variable to control error
899 handling. (SVID error handling and the _LIB_VERSION variable still work
900 for binaries linked against older versions of the GNU C Library.) The
901 libieee.a library is no longer provided. math.h no longer defines struct
902 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
903 TLOSS, PLOSS and HUGE.
905 * The libm functions pow10, pow10f and pow10l are no longer supported for
906 new programs. Programs should use the standard names exp10, exp10f and
907 exp10l for these functions instead.
909 * The mcontext_t type is no longer the same as struct sigcontext. On
910 platforms where it was previously the same, this changes the C++ name
911 mangling for interfaces involving this type.
913 * The add-ons mechanism for building additional packages at the same time as
914 glibc has been removed. The --enable-add-ons configure option is now
917 * The --without-fp configure option is now ignored. Whether hardware
918 floating-point instructions are used is now configured based on whether
919 the compiler used at configure time (without any options implied by a
920 --with-cpu= configure option) uses such instructions.
922 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
923 the specified string can be parsed as a domain name.
925 * In the malloc_info output, the <heap> element may contain another <aspace>
926 element, "subheaps", which contains the number of sub-heaps.
928 * The libresolv function p_secstodate is no longer supported for new
931 * The tilepro-*-linux-gnu configuration is no longer supported.
933 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
934 and will be removed in a future release. Software that is still using
935 either header should be updated to use standard <stdio.h> interfaces
938 libio.h was originally the header for a set of supported GNU extensions,
939 but they have not been maintained as such in many years, they are now
940 standing in the way of improvements to stdio, and we don't think there are
941 any remaining external users. _G_config.h was never intended for public
942 use, but predates the bits convention.
944 Changes to build and runtime requirements:
946 * bison version 2.7 or later is required to generate code in the 'intl'
949 Security related changes:
951 CVE-2009-5064: The ldd script would sometimes run the program under
952 examination directly, without preventing code execution through the
953 dynamic linker. (The glibc project disputes that this is a security
954 vulnerability; only trusted binaries must be examined using the ldd
957 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
958 suffered from a one-byte overflow during ~ operator processing (either
959 on the stack or the heap, depending on the length of the user name).
960 Reported by Tim Rühsen.
962 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
963 would sometimes fail to free memory allocated during ~ operator
964 processing, leading to a memory leak and, potentially, to a denial
967 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
968 without GLOB_NOESCAPE, could write past the end of a buffer while
969 unescaping user names. Reported by Tim Rühsen.
971 CVE-2017-17426: The malloc function, when called with an object size near
972 the value SIZE_MAX, would return a pointer to a buffer which is too small,
973 instead of NULL. This was a regression introduced with the new malloc
974 thread cache in glibc 2.26. Reported by Iain Buclaw.
976 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
977 to the allocation of too much memory. (This is not a security bug per se,
978 it is mentioned here only because of the CVE assignment.) Reported by
981 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
982 of the number of search path components. (This is not a security
983 vulnerability per se because no trust boundary is crossed if the fix for
984 CVE-2017-1000366 has been applied, but it is mentioned here only because
985 of the CVE assignment.) Reported by Qualys.
987 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
988 for AT_SECURE or SUID binaries could be used to load libraries from the
991 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
992 succeeds without returning an absolute path due to unexpected behaviour
993 of the Linux kernel getcwd syscall. Reported by halfdog.
995 CVE-2018-6485: The posix_memalign and memalign functions, when called with
996 an object size near the value of SIZE_MAX, would return a pointer to a
997 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
999 CVE-2018-6551: The malloc function, when called with an object size near
1000 the value of SIZE_MAX, would return a pointer to a buffer which is too
1001 small, instead of NULL.
1003 The following bugs are resolved with this release:
1005 [866] glob: glob should match dangling symlinks
1006 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1007 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1009 [5997] math: Very slow execution of sinf function
1010 [10580] localedata: hr_HR: updated locale
1011 [10871] locale: 'mon' array should contain both nominative and genitive
1013 [12349] localedata: eu_ES: incorrect thousands separator
1014 [13605] localedata: shn_MM: new Shan locale
1015 [13805] localedata: ru_RU: currency should use ',' as radix point
1016 [13953] localedata: km_KH: locale update
1017 [13994] localedata: mjw_IN: new locale
1018 [14121] build: make writes .mo files in po directory
1019 [14333] libc: Fix the race between atexit() and exit()
1020 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1021 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1023 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1024 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1025 width Latin characters
1026 [15332] localedata: es_CU: locale update
1027 [15436] stdio: Don't close or flush stdio streams on abort
1028 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1030 [16148] localedata: ca_ES: incorrect thousands separator
1031 [16750] dynamic-link: ldd should not try to execute the binaries
1033 [16777] localedata: pl_PL: incorrect thousands separator in locale
1034 [16905] localedata: hanzi: new collation
1035 [17563] localedata: cmn_TW: add hanzi collation
1036 [17750] localedata: wrong collation order of diacritics in most locales
1037 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1039 [17956] build: Build fails on missing definitions from header file
1040 nss/nss.h when Mozilla NSS is used for cryptography
1041 [18203] libc: realpath() does not handle unreachable paths correctly
1042 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1043 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1044 [18822] libc: Internal functions are called via PLT
1045 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1046 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1047 [19574] libc: glibc should support building static PIE binaries
1048 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1050 [19971] glob: glob: Do not skip entries with zero d_ino values
1051 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1052 [20008] localedata: km_KH: convert to translit_neutral
1053 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1054 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1055 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1056 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1057 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1059 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1060 they're set, wrong errors returned by gaih_inet when lookup functions
1062 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1063 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1065 [20952] localedata: yuw_PG: new locale
1066 [21084] localedata: charmaps/IBM858: new codepage
1067 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1068 [21242] libc: assert gives pedantic warning in old gcc versions
1069 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1070 __regcall calling convention
1071 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1072 [21326] libc: C99 functions are not declared for C++11 and later if
1073 _GNU_SOURCE is not predefined by g++
1074 [21457] libc: sys/ucontext.h namespace
1075 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1076 [21660] math: GCC fails to compile a formula with tgmath.h
1077 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1078 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1079 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1080 [21684] math: tgmath.h handling of complex integers
1081 [21685] math: tgmath.h handling of bit-fields
1082 [21686] math: tgmath.h handling of __int128
1083 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1085 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1087 [21750] localedata: column width of characters incompatible with classical
1089 [21754] malloc: malloc: Perform as little work as possible after heap
1090 consistency check failures
1091 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1092 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1093 [21791] string: Unused XXX_chk_XXX functions in libc.a
1094 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1096 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1098 [21845] localedata: Added new Locale bho_NP
1099 [21853] localedata: Fix abday Which looks same as day in zh_SG
1100 [21854] localedata: Added New Locale en_SC
1101 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1102 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1103 _dl_runtime_resolve_avx_slow
1104 [21885] network: getaddrinfo: gethosts does not release resolver context
1105 on memory allocation failure
1106 [21899] libc: XPG4.2 sigaction namespace
1107 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1109 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1111 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1112 errno value, causing getaddrinfo to fail
1113 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1114 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1115 instead of EAI_NODATA
1116 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1117 constant PTRACE_SEIZE_DEVEL
1118 [21930] math: C-only gcc builtins used in <math.h> isinf
1119 [21932] network: Unpaired __resolv_context_get in generic get*_r
1121 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1122 [21944] libc: sigval namespace
1123 [21951] localedata: Update hanzi collation by stroke
1124 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1125 sysdeps/x86_64/fpu/e_expf.S
1126 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1127 allocation in syscall loops)
1128 [21959] localedata: Fix Country name for xh_ZA
1129 [21960] localedata: Fix abmon for bem_ZM
1130 [21966] math: AVX2 mathvec functions use FMA without checking
1131 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1132 [21971] localedata: Added New Locale for mfe_MU
1133 [21972] libc: assert macro requires operator== (int) for its argument type
1134 [21973] math: [sparc] libm missing sqrtl compat symbol
1135 [21974] libc: Remove __bb_init_func and __bb_exit_func
1136 [21982] string: stratcliff.c: error: assuming signed overflow does not
1138 [21986] stdio: __guess_grouping is called incorrectly
1139 [21987] math: [sparc32] wrong bits/long-double.h installed
1140 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1142 [22022] localedata: Missing country_name for mni_IN
1143 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1145 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1147 [22026] locale: iconv_open: heap overflow on gconv_init failure
1148 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1149 [22035] math: [m68k] bits/math-inline.h macro namespace
1150 [22038] localedata: Fix abbreviated weeks and months for Somali
1151 [22044] localedata: Remove redundant data for Limburgish Language
1152 [22050] malloc: Linking with -lmcheck does not hook
1153 __malloc_initialize_hook correctly
1154 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1155 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1156 [22070] localedata: charmaps/UTF-8: wcwidth for
1157 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1158 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1159 Jungseong and Jongseong) should be 0
1160 [22078] nss: nss_files performance issue in multi mode
1161 [22082] math: bits/math-finite.h exp10 condition
1162 [22086] libc: pcprofiledump incorrect cross-endian condition
1163 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1164 [22095] network: Name server address allocation memory leak in resolv.conf
1166 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1168 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1169 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1171 [22111] malloc: malloc: per thread cache is not returned when thread exits
1172 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1173 [22134] libc: [linux] implement fexecve with execveat
1174 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1176 [22145] libc: ttyname() gives up too early in the face of namespaces
1177 [22146] math: C++ build issue with float128 on x86_64
1178 [22153] nptl: nptl: save error code before process termination
1179 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1180 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1181 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1182 [22165] libc: [hppa] Text relocations in libc.so
1183 [22180] libc: destructor registered via __cxa_atexit is called twice
1184 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1185 symlinks") cause "make" segfaults
1186 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1188 [22207] libc: FAIL: stdlib/test-atexit-race
1189 [22225] math: nearbyint arithmetic moved before feholdexcept
1190 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1191 [22235] math: iscanonical in C++ and float128
1192 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1193 the svid compat wrapper
1194 [22244] math: ynf and yn are wrong without the svid compat wrapper
1195 [22273] libc: Improper assert in Linux posix_spawn implementation
1196 [22284] libc: -pg -pie doesn't work
1197 [22292] locale: localedef exits with error 4 when it should be error 1
1198 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1199 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1201 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1202 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1204 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1205 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1206 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1207 [22322] libc: [mips64] wrong bits/long-double.h installed
1208 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1209 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1211 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1212 [22343] malloc: Integer overflow in posix_memalign
1213 [22347] libc: getrandom() returns the number of bytes that were copied to
1214 the buffer even though the comments say "Return 0 on success and -1 on
1216 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1217 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1219 [22370] dynamic-link: Incorrect note padding check
1220 [22375] libc: malloc returns pointer from tcache_get when should return
1221 NULL (CVE-2017-17426)
1222 [22377] math: iseqsig, float128 and C++
1223 [22382] localedata: Error in tpi_PG locale
1224 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1225 inside the ASCII printable range
1226 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1228 [22403] localedata: Slash needs escaping in some locales
1229 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1230 [22409] network: res_hnok does not accept some host names used on the
1232 [22412] network: res_dnok, res_hnok should perform syntax checks
1233 [22413] network: ns_name_pton ignores syntactically invalid trailing
1235 [22415] stdio: setvbuf can lead to invalid free/segfault
1236 [22432] build: Non-deterministic build
1237 [22439] malloc: malloc_info should compute summary statistics for all sub-
1239 [22442] network: if_nametoindex could report index for the wrong
1240 networking interface
1241 [22446] build: aliasing violation calling readlink in handle_request
1242 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1243 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1244 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1245 __nscd_hash/__nss_hash
1246 [22463] network: p_secstodate overflow handling
1247 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1248 [22478] libc: sigwait can fail with EINTR
1249 [22505] libc: ldconfig processes include directive in locale-specific
1251 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1252 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1253 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1254 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1255 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1256 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1257 same as for Croatian
1258 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1259 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1260 [22577] libc: missing newline after "cannot allocate TLS data structures
1262 [22588] manual: manual/conf.texi: missing underscore in front of
1264 [22593] math: nextafter and nexttoward are declared with const attribute
1265 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1266 [22603] string: ia64 memchr overflows internal pointer check
1267 [22605] libc: SH clone does not set the exit code correctly
1268 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1270 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1271 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1272 modified in case of success
1273 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1274 [22615] manual: manual: ambiguous wording about errno value in case of
1276 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1278 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1279 binaries or if /proc is not mounted (CVE-2017-16997)
1280 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1281 [22630] build: $(no-pie-ldflag) is no longer effective
1282 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1283 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1284 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1285 [22637] nptl: guard size is subtracted from thread stack size instead of
1287 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1288 [22657] localedata: hu_HU: Avoid double space in date
1289 [22660] math: fmax, fmin sNaN handling on alpha
1290 [22664] libc: New warning of GCC8
1291 [22665] math: alpha: ceil and floor raise inexact exceptions
1292 [22666] math: alpha: trunc raise inexact exceptions
1293 [22667] libc: makecontext lacks stack alignment on i386
1294 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1295 [22679] libc: getcwd(3) can succeed without returning an absolute path
1297 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1298 elision and tunables
1299 [22687] math: [powerpc-nofpu] complex long double functions spurious
1301 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1302 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1303 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1305 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1306 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1308 [22701] nis: Incomplete removal of libnsl
1309 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1310 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1311 [22715] dynamic-link: FAIL: elf/tst-audit10
1312 [22719] libc: Backtrace tests fail on hppa
1313 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1314 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1315 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1316 before the first call to crypt_r () in crypt/badsalttest.c
1323 * A per-thread cache has been added to malloc. Access to the cache requires
1324 no locks and therefore significantly accelerates the fast path to allocate
1325 and free small amounts of memory. Refilling an empty cache requires locking
1326 the underlying arena. Performance measurements show significant gains in a
1327 wide variety of user workloads. Workloads were captured using a special
1328 instrumented malloc and analyzed with a malloc simulator. Contributed by
1329 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1331 * Unicode 10.0.0 Support: Character encoding, character type info, and
1332 transliteration tables are all updated to Unicode 10.0.0, using
1333 generator scripts contributed by Mike FABIAN (Red Hat).
1334 These updates cause user visible changes, especially the changes in
1335 wcwidth for many emoji characters cause problems when emoji sequences
1336 are rendered with pango, see for example:
1337 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1339 * Collation of Hungarian has been overhauled and is now consistent with "The
1340 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1343 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1345 - The GNU C Library will now detect when /etc/resolv.conf has been
1346 modified and reload the changed configuration. The new resolver option
1347 “no-reload” (RES_NORELOAD) disables this behavior.
1349 - The GNU C Library now supports an arbitrary number of search domains
1350 (configured using the “search” directive in /etc/resolv.conf);
1351 previously, there was a hard limit of six domains. For backward
1352 compatibility, applications that directly modify the ‘_res’ global
1353 object are still limited to six search domains.
1355 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
1356 Library will now randomly pick a name server from the configuration as a
1357 starting point. (Previously, the second name server was always used.)
1359 * The tunables feature is now enabled by default. This allows users to tweak
1360 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1362 * New function reallocarray, which resizes an allocated block (like realloc)
1363 to the product of two sizes, with a guaranteed clean failure upon integer
1364 overflow in the multiplication. Originally from OpenBSD, contributed by
1365 Dennis Wölfing and Rüdiger Sonderfeld.
1367 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1368 These are extended versions of preadv and pwritev, respectively, taking an
1369 additional flags argument. The set of supported flags depends on the
1370 running kernel; full support currently requires kernel 4.7 or later.
1372 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1373 create a new session ID for the spawned process. This feature is
1374 scheduled to be added to the next major revision of POSIX; for the time
1375 being, it is available under _GNU_SOURCE.
1377 * errno.h is now safe to use from C-preprocessed assembly language on all
1378 supported operating systems. In this context, it will only define the
1379 Exxxx constants, as preprocessor macros expanding to integer literals.
1381 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1382 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1383 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1384 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1386 To compile programs that use this feature, the compiler must support
1387 128-bit floating point with the type name _Float128 (as defined by TS
1388 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1389 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1390 must be defined to make the new interfaces visible.
1392 The new functions and macros correspond to those present for other
1393 floating-point types (except for a few obsolescent interfaces not
1394 supported for the new type), with F128 or f128 suffixes; for example,
1395 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1396 printf or scanf formats for the new type; the strfromf128 and strtof128
1397 interfaces should be used instead.
1399 Deprecated and removed features, and other changes affecting compatibility:
1401 * The synchronization that pthread_spin_unlock performs has been changed to
1402 now be equivalent to a C11 atomic store with release memory order to the
1403 spin lock's memory location. Previously, several (but not all)
1404 architectures used stronger synchronization (e.g., containing what is
1405 often called a full barrier). This change can improve performance, but
1406 may affect odd fringe uses of spin locks that depend on the previous
1407 behavior (e.g., using spin locks as atomic variables to try to implement
1408 Dekker's mutual exclusion algorithm).
1410 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1413 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1414 will only be built and installed when the GNU C Library is configured with
1415 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1416 as TIRPC or rpcsvc-proto, to be used.
1418 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1419 libnss_compat, are deprecated, and will not be built or installed by
1422 The NIS(+) support library, libnsl, is also deprecated. By default, a
1423 compatibility shared library will be built and installed, but not headers
1424 or development libraries. Only a few NIS-related programs require this
1425 library. (In particular, the GNU C Library has never required programs
1426 that use 'gethostbyname' to be linked with libnsl.)
1428 Replacement implementations based on TIRPC, which additionally support
1429 IPv6, are available from <https://github.com/thkukuk/>. The configure
1430 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1431 name service modules, to be built and installed.
1433 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1434 support is enabled, the configured recursive resolver must support EDNS.
1435 (Responding to EDNS-enabled queries with responses which are not
1436 EDNS-enabled is fine, but FORMERR responses are not.)
1438 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1439 servers have not supported this opcode for a long time.
1441 * The _res_opcodes variable has been removed from libresolv. It had been
1442 exported by accident.
1444 * <string.h> no longer includes inline versions of any string functions,
1445 as this kind of optimization is better done by the compiler. The macros
1446 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1448 * The nonstandard header <xlocale.h> has been removed. Most programs should
1449 use <locale.h> instead. If you have a specific need for the definition of
1450 locale_t with no other declarations, please contact
1451 libc-alpha@sourceware.org and explain.
1453 * The obsolete header <sys/ultrasound.h> has been removed.
1455 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1457 * The obsolete function cfree has been removed. Applications should use
1460 * The stack_t type no longer has the name struct sigaltstack. This changes
1461 the C++ name mangling for interfaces involving this type.
1463 * The ucontext_t type no longer has the name struct ucontext. This changes
1464 the C++ name mangling for interfaces involving this type.
1466 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1467 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1468 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1469 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1470 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1471 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1472 fpregset_t type no longer has the name struct fpu. This changes the C++
1473 name mangling for interfaces involving those types.
1475 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1476 synced with the kernel:
1478 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1479 are not supported on this architecture and have been removed.
1481 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1482 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1483 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1485 Programs that assume the GET/SETREGS ptrace requests are universally
1486 available will now fail to build, instead of malfunctioning at runtime.
1488 Changes to build and runtime requirements:
1490 * Linux kernel 3.2 or later is required at runtime, on all architectures
1491 supported by that kernel. (This is a change from version 2.25 only for
1494 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1496 * On most architectures, GCC 4.9 or later is required to build the GNU C
1497 Library. On powerpc64le, GCC 6.2 or later is required.
1499 Older GCC versions and non-GNU compilers are still supported when
1500 compiling programs that use the GNU C Library. (We do not know exactly
1501 how old, and some GNU extensions to C may be _de facto_ required. If you
1502 are interested in helping us make this statement less vague, please
1503 contact libc-alpha@sourceware.org.)
1505 Security related changes:
1507 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1508 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1510 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1511 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1513 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1514 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1517 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1518 fixed (CVE-2017-12133).
1520 The following bugs are resolved with this release:
1522 [984] network: Respond to changed resolv.conf in gethostbyname
1523 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1524 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1526 [12189] libc: __stack_chk_fail should not attempt a backtrace
1528 [14096] time: Race condition on timezone/tst-timezone.out
1529 [14172] localedata: az_IR: new locale
1530 [14995] build: glibc fails to build if gold is the default linker, even if
1532 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1533 [16637] network: inet_pton function is accepting IPv6 with bad format
1534 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1535 x86 and other generic code
1536 [16875] localedata: ko_KR: fix lang_name
1537 [17225] localedata: ar_SY: localized month names for May and June are
1539 [17297] localedata: da_DK: wrong date_fmt string
1540 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1541 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1542 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1543 [19066] localedata: ar_SA abbreviated day and month names are in English
1544 [19569] network: resolv: Support an arbitrary number of search domains
1545 [19570] network: Implement random DNS server selection in the stub
1547 [19838] locale: localedef fails on PA-RISC
1548 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1549 order of 0D36 and 0D37
1550 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1552 [20098] libc: FAIL: debug/backtrace-tst on hppa
1553 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1555 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1557 [20313] localedata: Update locale data to Unicode 9.0
1558 [20424] manual: Document how to provide a malloc replacement
1559 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1561 [20686] locale: Add el_GR@euro to SUPPORTED.
1562 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1563 failures consistently
1564 [21015] dynamic-link: Document and fix --enable-bind-now
1565 [21016] nptl: pthread_cond support is broken on hppa
1566 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1567 frame-pointer on i386
1568 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1570 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1571 [21088] libc: Build fails with --enable-static-nss
1572 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1573 generic c code is used
1574 [21109] libc: Tunables broken on big-endian
1575 [21112] math: powf has large ulp errors with base close to 1 and exponent
1577 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1579 [21120] malloc: glibc malloc is incompatible with GCC 7
1580 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1582 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1583 (-0.0) when linking with -lieee
1584 [21171] math: log10, log2 and lgamma return incorrect results
1585 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1586 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1587 [21207] localedata: ce_RU: update weekdays from CLDR
1588 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1589 [21217] localedata: Update months from CLDR-31
1590 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1591 [21243] libc: support_delete_temp_file should issue warning for failed
1593 [21244] libc: support resolv_test_start() socket fd close should be
1595 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1596 new posix_spawn implementation
1597 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1598 leads to lower CPU frequency
1599 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1600 [21261] libc: [sparc64] bits/setjmp.h namespace
1601 [21267] network: [mips] bits/socket.h IOC* namespace
1602 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1603 [21270] libc: mmap64 silently truncates large offset values
1604 [21275] libc: posix_spawn always crashes on ia64 now
1605 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1606 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1607 [21289] libc: Incorrect declaration for 32-bit platforms with
1608 _FILE_OFFSET_BITS=64 causes build error
1609 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1610 not support gethostbyname4_r
1611 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1613 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1615 [21340] libc: Support POSIX_SPAWN_SETSID
1616 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1617 [21359] network: ns_name_pack needs additional byte in destination buffer
1618 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1619 against fragmentation attacks (CVE-2017-12132)
1620 [21369] network: resolv: Remove EDNS fallback
1621 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1623 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1624 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1625 [21393] stdio: Missing dup3 error check in freopen, freopen64
1626 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1627 [21399] localedata: Bad description for U00EC in
1628 localedata/charmaps/CP1254
1629 [21411] malloc: realloc documentation error
1630 [21426] network: sys/socket.h uio.h namespace
1631 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1632 [21445] libc: signal.h bsd_signal namespace
1633 [21455] network: Network headers stdint.h namespace
1634 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1636 [21475] network: resolv: Overlong search path is truncated mid-label
1637 [21511] libc: sigstack namespace
1638 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1639 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1640 bits/syscall.h: No such file or directory
1641 [21517] libc: struct sigaltstack namespace
1642 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1643 [21533] localedata: Update locale data to Unicode 10.0
1645 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1646 junk at end of line, first unrecognized character is `@'
1647 [21538] libc: SIG_HOLD missing for XPG4
1648 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1649 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1650 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1651 [21543] libc: sigevent namespace
1652 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1653 size for general purpose registers in mcontext_t structure
1654 [21550] libc: sigwait namespace
1655 [21552] libc: XPG4 bsd_signal namespace
1656 [21554] libc: sigpause namespace
1657 [21560] libc: sys/wait.h signal.h namespace
1658 [21561] libc: waitid namespace
1659 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1660 '/usr/include/stdlib.h': Permission denied
1661 [21575] libc: sys/wait.h missing struct rusage definition
1662 [21584] libc: sigaltstack etc namespace
1663 [21597] libc: siginterrupt namespace
1664 [21607] math: hppa: FAIL: math/test-tgmath
1665 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1667 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1668 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1669 stack and heap (CVE-2017-1000366)
1670 [21625] libc: wait3 namespace
1671 [21654] nss: Incorrect pointer alignment in NSS group merge result
1673 [21657] network: Parse interface zone id for node-local multicast
1674 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1676 [21666] libc: .symver is used on common symbol
1677 [21668] network: resolv: res_init cross-thread broadcast introduces race
1679 [21687] math: tgmath.h totalorder, totalordermag return type
1680 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1682 [21696] libc: Incorrect assumption of of __cpu_mask in
1683 posix/sched_cpucount.c
1684 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1685 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1687 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1688 leading to relocation crash
1689 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1690 `resolv_conf_matches (resp, conf)' failed.
1691 [21710] localedata: Added Samoan language locale for Samoa
1692 [21711] localedata: Pashto yesstr/nostr locale are missing
1693 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1694 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1695 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1696 [21723] localedata: yesstr/nostr missing for Chinese language locale
1697 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1699 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1701 [21728] localedata: New Locale for Tongan language
1702 [21729] localedata: incorrect LC_NAME fields for hi_IN
1703 [21733] localedata: yesstr and nostr are missing for zh_HK
1704 [21734] localedata: Missing yesstr and nostr are for kw_GB
1705 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1706 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1707 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1708 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1710 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1712 [21749] localedata: Wrong abbreviated day name (“abday”) for
1714 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1715 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1716 [21759] localedata: missing yesstr and nostr for Tigrinya
1717 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1718 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1719 [21767] localedata: Missing Bislama locales
1720 [21768] localedata: Missing yesstr and nostr for aa_ET
1721 [21770] localedata: Missing Field in li_NL
1722 [21778] nptl: Robust mutex may deadlock
1723 [21779] libc: MicroBlaze segfaults when loading libpthread
1724 [21783] localedata: Fix int_select international_call_prefixes
1725 [21784] localedata: Inconsistency in country_isbn
1726 [21788] localedata: Missing Country Postal Abbreviations
1727 [21794] localedata: Added-country_isbn-for-Italy
1728 [21795] localedata: Add/Fix country_isbn for France
1729 [21796] localedata: Added country_isbn for Republic of Korea
1730 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1731 [21799] localedata: Added int_select international_call_prefixes
1732 [21801] localedata: Added int_select international_call_prefixes
1733 [21804] nptl: Double semicolon in thread-shared-types.h
1734 [21807] localedata: LC_ADDRESS fix for pap_CW
1735 [21808] localedata: Fix LC_ADDRESS for pap_AW
1736 [21821] localedata: Added country_name in mai_IN
1737 [21822] localedata: Fix LC_TIME for mai_IN
1738 [21823] localedata: missing yesstr, nostr for sa_IN
1739 [21825] localedata: Fix name_mrs for mag_IN
1740 [21828] localedata: 2.26 changelog should mention user visible changes
1742 [21835] localedata: Added Maithili language locale for Nepal
1743 [21838] localedata: Removed redundant data for the_NP
1744 [21839] localedata: Fix LC_MONETARY for ta_LK
1745 [21844] localedata: Fix Latin characters and Months Sequence.
1746 [21848] localedata: Fix mai_NP Title Name
1751 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1752 24731-2:2010, is supported to enable declarations of functions from that
1753 TR. Note that not all functions from that TR are supported by the GNU C
1756 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1757 18661-1:2014, is supported to enable declarations of functions and macros
1758 from that TS. Note that not all features from that TS are supported by
1761 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1762 18661-4:2015, is supported to enable declarations of functions and macros
1763 from that TS. Note that most features from that TS are not supported by
1766 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1767 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1768 Since the GNU C Library defaults to a much newer revision of POSIX, this
1769 will only affect programs that specifically request an old conformance
1770 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1771 see a change in the visible declarations, but a program compiled with
1772 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1775 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1776 defined by all multithreaded code, but glibc has not required this for
1779 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1780 means that in a future release, the macros “major”, “minor”, and “makedev”
1781 will only be available from <sys/sysmacros.h>.
1783 These macros are not part of POSIX nor XSI, and their names frequently
1784 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1785 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1786 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1789 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1790 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1791 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1793 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1794 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1795 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1796 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1797 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1798 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1799 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1800 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1801 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1802 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1803 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1806 * New <math.h> features are added from TS 18661-1:2014:
1808 - Signaling NaN macros: SNANF, SNAN, SNANL.
1810 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1811 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1812 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1814 - llogb functions: the llogb, llogbf and llogbl functions, and the
1815 FP_LLOGB0 and FP_LLOGBNAN macros.
1817 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1820 - Comparison macros: iseqsig.
1822 - Classification macros: iscanonical, issubnormal, iszero.
1824 - Total order functions: totalorder, totalorderf, totalorderl,
1825 totalordermag, totalordermagf, totalordermagl.
1827 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1829 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1830 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1832 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1833 are added to libc. They convert a floating-point number into string.
1835 * Most of glibc can now be built with the stack smashing protector enabled.
1836 It is recommended to build glibc with --enable-stack-protector=strong.
1837 Implemented by Nick Alcock (Oracle).
1839 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1840 intended to be used instead of memset() to erase sensitive data after use;
1841 the compiler will not optimize out calls to explicit_bzero even if they
1842 are "unnecessary" (in the sense that no _correct_ program can observe the
1843 effects of the memory clear).
1845 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1846 to float instead of double. This does not affect the ABI of any libraries
1847 that are part of the GNU C Library, but may affect the ABI of other
1848 libraries that use this type in their interfaces.
1850 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1851 float_t and double_t types are now defined to long double instead of float
1852 and double. These options are not the default, and this does not affect
1853 the ABI of any libraries that are part of the GNU C Library, but it may
1854 affect the ABI of other libraries that use this type in their interfaces,
1855 if they are compiled or used with those options.
1857 * The getentropy and getrandom functions, and the <sys/random.h> header file
1860 * The buffer size for byte-oriented stdio streams is now limited to 8192
1861 bytes by default. Previously, on Linux, the default buffer size on most
1862 file systems was 4096 bytes (and thus remains unchanged), except on
1863 network file systems, where the buffer size was unpredictable and could be
1864 as large as several megabytes.
1866 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1867 for the Linux quota interface which predates kernel version 2.4.22 has
1870 * The malloc_get_state and malloc_set_state functions have been removed.
1871 Already-existing binaries that dynamically link to these functions will
1872 get a hidden implementation in which malloc_get_state is a stub. As far
1873 as we know, these functions are used only by GNU Emacs and this change
1874 will not adversely affect already-built Emacs executables. Any undumped
1875 Emacs executables, which normally exist only during an Emacs build, should
1876 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1878 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1879 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1880 “no-ip6-dotint” had already been the default, and support for the
1881 “ip6-dotint” option was removed from the Internet in 2006.
1883 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1884 flag from <resolv.h> have been removed. The option relied on a
1885 backwards-incompatible DNS extension which was never deployed on the
1888 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1889 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1890 They were already unimplemented.
1892 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1893 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1894 removed again from the IETF name lookup interface specification in RFC
1895 2553. Applications should use getaddrinfo instead.
1897 * DNSSEC-related declarations and definitions have been removed from the
1898 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1899 decode the data part of DNSSEC record types. Previous versions of glibc
1900 only implemented minimal support for the previous version of DNSSEC, which
1901 is incompatible with the currently deployed version.
1903 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1904 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1905 <arpa/nameser.h> header file because the distinction between RR types and
1906 meta-RR types is not officially standardized, subject to revision, and
1907 thus not suitable for encoding in a macro.
1909 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1910 and rhook members of the res_state type in <resolv.h> have been removed.
1911 The glibc stub resolver did not support these hooks, but the header file
1912 did not reflect that.
1914 * For multi-arch support it is recommended to use a GCC which has
1915 been built with support for GNU indirect functions. This ensures
1916 that correct debugging information is generated for functions
1917 selected by IFUNC resolvers. This support can either be enabled by
1918 configuring GCC with '--enable-gnu-indirect-function', or by
1919 enabling it by default by setting 'default_gnu_indirect_function'
1920 variable for a particular architecture in the GCC source file
1923 * GDB pretty printers have been added for mutex and condition variable
1924 structures in POSIX Threads. When installed and loaded in gdb these pretty
1925 printers show various pthread variables in human-readable form when read
1926 using the 'print' or 'display' commands in gdb.
1928 * Tunables feature added to allow tweaking of the runtime for an application
1929 program. This feature can be enabled with the '--enable-tunables' configure
1930 flag. The GNU C Library manual has details on usage and README.tunables has
1931 instructions on adding new tunables to the library.
1933 * A new version of condition variables functions have been implemented in
1934 the NPTL implementation of POSIX Threads to provide stronger ordering
1937 * A new version of pthread_rwlock functions have been implemented to use a more
1938 scalable algorithm primarily through not using a critical section anymore to
1941 Security related changes:
1943 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1944 have been created with makecontext could fail to terminate due to a
1945 missing .cantunwind annotation. This has been observed to lead to a hang
1946 (denial of service) in some Go applications compiled with gccgo. Reported
1947 by Andreas Schwab. (CVE-2016-6323)
1949 * The DNS stub resolver functions would crash due to a NULL pointer
1950 dereference when processing a query with a valid DNS question type which
1951 was used internally in the implementation. The stub resolver now uses a
1952 question type which is outside the range of valid question type values.
1955 The following bugs are resolved with this release:
1957 [4099] stdio: Overly agressive caching by stream i/o functions.
1958 [7065] build: Support building glibc with -fstack-protector or -fstack-
1960 [9842] localedata: en_CA: incorrect date format
1961 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1962 before it started waiting
1963 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1964 [15765] nptl: sem_open is wrongly a cancellation point
1965 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1966 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1968 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1969 library linked with pthread
1970 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1971 "FIXME: Ingo" issue)
1972 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1973 [17252] libc: getrandom and getentropy syscall
1974 [17730] malloc: thread-local storage is sometimes improperly free()'d
1975 after being __libc_memalign()'d
1976 [18241] stdio: failed fseek on memstream does not set errno and can fail
1978 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
1980 [18463] nptl: pthread_cond_broadcast issue when surrounded by
1981 PTHREAD_PRIO_INHERIT mutex on ARM
1982 [18784] network: res_query and related function crash for special record
1983 type queries (CVE-2015-5180)
1984 [19380] math: strtod does not raise "inexact"
1985 [19387] string: Integer overflow in memchr
1986 [19390] string: Integer overflow in strncat
1987 [19398] build: linknamespace tests fail with massively parallel build
1988 [19402] nptl: Deadlock with robust shared mutex and asynchronous
1990 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
1991 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
1992 [19514] libc: [PATCH] Fix spelling errors in spelling
1993 "implement"/"implementation" in several places
1994 [19582] network: Deprecate RES_USE_INET6
1995 [19673] manual: clog10 docs appear to be erroneous
1996 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
1997 causes a segmentation fault
1998 [19826] libc: invalid pointer returned from __tls_get_addr with static
2000 [20016] network: resolv: Remove hooks support from the API
2001 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2003 [20033] math: [x86_64] vectorized math function don't call the __finite
2005 [20116] nptl: use after free in pthread_create
2006 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2007 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2009 [20311] nptl: please install proc_service.h
2010 [20366] libc: Compilation errors in installed headers in strict-compliance
2012 [20370] malloc: malloc: Arena free list management is still racy
2013 (incorrect fix in bug 19243)
2014 [20386] libc: assert (X = 0) does not result in GCC warning
2015 [20432] malloc: malloc: Minimize interface required for interposition
2016 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2017 in _Unwind_Backtrace (CVE-2016-6323)
2018 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2019 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2021 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2022 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2023 [20477] network: resolv: incorrect double-checked locking related to
2025 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2027 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2029 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2030 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2031 cause transition penalty
2032 [20517] math: sparcv9 missing fdiml compat symbol
2033 [20524] manual: strverscmp is inconsistent
2034 [20525] libc: <sys/quota.h> should be based on kernel headers
2035 [20539] math: GCC 7 -static -lm fails to link at -O3
2036 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2038 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2040 [20591] network: Remove obsolete DNSSEC support
2041 [20592] network: DNS resource record type classification macros in
2042 <arpa/nameser.h> are incorrect
2043 [20593] network: Update DNS RR type definitions
2044 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2045 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2047 [20629] network: libresolv: Remove support for bitstring labels
2049 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2050 assertion: "maxidx >= 2"
2051 [20660] math: [arm] Use VSQRT
2052 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2053 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2054 [20689] libc: Test for FMA should also check for AVX.
2055 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2056 [20715] math: iszero macro breaks existing code
2057 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2058 [20728] libc: powerpc: Missing TOC stub in clone
2059 [20729] build: glibc-2.24 fails to build for i486 with -Os
2060 [20750] build: Build fails with default PIE enabled gcc-6.x
2061 [20768] math: [alpha] sqrt fegetenv namespace
2062 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2064 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2065 __FLT_EVAL_METHOD__ is 2
2066 [20790] network: rpcgen buffer overrun in get_prog_declaration
2067 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2068 [20829] libc: crypt snprintf namespace
2069 [20847] libc: tst-vfork3 failure
2070 [20855] math: Default bits/mathdef.h has inappropriate float_t
2071 [20859] math: [sh4] FP_ILOGB0 invalid
2072 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2073 U+20AC), not same as GBK
2074 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2075 [20916] math: pow handling of sNaN arguments
2076 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2077 [20919] math: Bad pow (qNaN, 0) result with -lieee
2078 [20940] math: hypot sNaN handling
2079 [20947] math: fmax, fmin sNaN handling
2080 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2081 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2083 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2084 [20973] nptl: robust mutexes: Lost wake-ups
2085 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2086 [20978] nis: strlen on null pointer in nss_nisplus
2087 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2089 [21014] string: i686 memchr overflows internal pointer check
2090 [21019] libc: [mips] n32 lseek incorrect on overflow
2091 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2092 [21026] libc: [MIPS] readahead syscall is broken on n64
2093 [21028] math: Fallback fesetexceptflag should always succeed
2094 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2095 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2097 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2098 [21061] librt: [microblaze] librt lost clock_* exports
2099 [21073] libc: tunables: insecure environment variables passed to
2100 subprocesses with AT_SECURE
2101 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2105 * The minimum Linux kernel version that this version of the GNU C Library
2106 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2107 kernel version 2.6.32 or later suffices (on architectures that already
2108 required kernel versions more recent than 3.2, those requirements remain
2109 unchanged). Linux 3.2 or later kernel headers are required on all
2112 * The pap_AN locale has been deleted. This has been deprecated for a long
2113 time. It has been replaced by pap_AW & pap_CW, both of which have long
2114 been included in previous releases.
2116 * The readdir_r and readdir64_r functions have been deprecated. It is
2117 recommended to use readdir and readdir64 instead.
2119 * The type “union wait” has been removed. It was deprecated in the early
2120 1990s and never part of POSIX. Application code should use the int type
2121 instead of “union wait”.
2123 * A new NSS action is added to facilitate large distributed system
2124 administration. The action, MERGE, allows remote user stores like LDAP
2125 to be merged into local user stores like /etc/groups in order to provide
2126 easy to use, updated, and managed sets of merged credentials. The new
2127 action can be used by configuring it in /etc/nsswitch.conf:
2128 group: files [SUCCESS=merge] nis
2129 Implemented by Stephen Gallagher (Red Hat).
2131 * The deprecated __malloc_initialize_hook variable has been removed from the
2134 * The long unused localedef --old-style option has been removed. It hasn't
2135 done anything in over 16 years. Scripts using this option can safely
2138 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2139 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2140 return the next representable value in the direction of positive infinity
2141 and the nextdown functions return the next representable value in the
2142 direction of negative infinity. These are currently enabled as GNU
2145 Security related changes:
2147 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2148 could result in a stack overflow when getnetbyname was called with an
2149 overly long name. (CVE-2016-3075)
2151 * Previously, getaddrinfo copied large amounts of address data to the stack,
2152 even after the fix for CVE-2013-4458 has been applied, potentially
2153 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2154 instead. Reported by Michael Petlan. (CVE-2016-3706)
2156 * The glob function suffered from a stack-based buffer overflow when it was
2157 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2158 Reported by Alexander Cherepanov. (CVE-2016-1234)
2160 * The Sun RPC UDP client could exhaust all available stack space when
2161 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2162 alloca plugin for GCC. (CVE-2016-4429)
2164 * The IPv6 name server management code in libresolv could result in a memory
2165 leak for each thread which is created, performs a failing naming lookup,
2166 and exits. Over time, this could result in a denial of service due to
2167 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2169 The following bugs are resolved with this release:
2171 [1170] localedata: ne_NP: update Nepali locale definition file
2172 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2174 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2175 [6796] math: fdim() does not set errno on overflow
2176 [10354] libc: posix_spawn should use vfork() in more cases than presently
2177 [11213] localedata: localedata: add copyright disclaimer to locale files
2178 [12143] localedata: chr_US: new Cherokee locale
2179 [12450] localedata: sgs_LT: new locale
2180 [12676] localedata: ln_CD: new locale
2181 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2183 [13304] math: fma, fmaf, fmal produce wrong results
2184 [14259] build: --localedir arg to configure is ignored
2185 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2186 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2187 [14934] localedata: es_CL: wrong first weekday chilean locale
2188 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2190 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2192 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2193 [15368] nptl: raise() is not async-signal-safe
2194 [15479] math: ceil, floor, round and trunc raise inexact exception
2195 [15578] localedata: kk_KZ: various updates
2196 [16003] localedata: pap_AN: punt old locale
2197 [16137] localedata: iw_IL: punt old locale
2198 [16190] localedata: eo: new esperanto locale
2199 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2200 [16742] malloc: race condition: pthread_atfork() called before first
2201 malloc() results in unexpected locking behaviour/deadlocks
2202 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2204 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2205 [17565] localedata: pt_PT: wrong (work-)week start
2206 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2207 [17950] build: Build fails with -msse
2208 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2209 [18433] libc: posix_spawn does not return correctly upon failure to
2211 [18453] localedata: charmaps/IBM875: incorrect codes
2212 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2214 [18896] localedata: he_IL: improvements for currency
2215 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2216 Romanian locale data
2217 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2219 [19056] libc: Deprecate readdir_r
2220 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2222 [19198] localedata: nl_NL: small improvements for Dutch locales
2223 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2224 nameservers (CVE-2016-5417)
2225 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2227 [19400] locale: Language missing in "iso-639.def", trivial fix in
2229 [19431] malloc: Deadlock between fflush, getdelim, and fork
2230 [19505] libc: Incorrect file descriptor validity checks in
2231 posix_spawn_file_actions_add{open,close,dup2}
2232 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2233 when using RTLD_NEXT
2234 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2235 `intl/{gettextP,loadinfo}.h'
2236 [19534] libc: execle, execlp may use malloc
2237 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2238 [19573] network: res_nclose and __res_maybe_init disagree about name
2239 server initialization, breaking Hesiod
2240 [19575] localedata: Status of GB18030 tables
2241 [19581] localedata: sr_* date_fmt string contains additional newline
2242 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2244 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2245 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2246 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2247 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2249 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2251 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2253 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2254 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2255 [19633] locale: strfmon_l applies global locale to number formatting
2256 [19642] network: Memory leak in getnameinfo
2257 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2258 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2260 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2261 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2263 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2264 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2266 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2268 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2270 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2271 pointers and lengths in error-case.
2272 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2273 report errors on UTF-16 surrogates values.
2274 [19755] nscd: nscd assertion failure in gc
2275 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2276 [19759] libc: mempcpy shouldn't be inlined
2277 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2278 [19765] libc: s390 needs an optimized mempcpy
2279 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2280 NAME_MAX limit assumption (CVE-2016-1234)
2281 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2282 [19787] network: Missing and incorrect truncation checks in getnameinfo
2283 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2285 [19791] network: Assertion failure in res_query.c with un-connectable name
2287 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2288 [19822] math: libm.so install clobbers old version
2289 [19825] network: resolv: send_vc can return uninitialized data in second
2290 response to getaddrinfo
2291 [19830] network: nss_dns: should check RDATA length against buffer length
2292 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2293 confronted with A/AAAA records of invalid size
2294 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2295 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2296 [19853] stdio: Printing IBM long double in decimal with high precision is
2298 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2299 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2300 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2302 [19865] network: Assertion failure or memory leak in
2303 _nss_dns_getcanonname_r
2304 [19868] network: nss_dns: netent code does not skip over non-PTR records
2305 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2307 [19881] string: Improve x86-64 memset
2308 [19907] string: Incorrect memcpy tests
2309 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2311 [19925] libc: termios.h XCASE namespace
2312 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2313 [19929] libc: limits.h NL_NMAX namespace
2314 [19931] stdio: Memory leak in vfprintf
2315 [19957] libc: clone(CLONE_VM) access invalid parent memory
2316 [19963] localedata: en_IL: New locale
2317 [19989] stdio: stdio.h cuserid namespace
2318 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2320 [19996] locale: langinfo.h nl_langinfo_l namespace
2321 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2322 [20010] network: getaddrinfo: Stack overflow in hostent translation
2324 [20012] stdio: libio: fmemopen append mode failure
2325 [20014] stdio: stdio.h namespace for pre-threads POSIX
2326 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2327 [20023] libc: fcntl.h timespec namespace
2328 [20024] math: [x86_64] vectorized sincos trashes the stack
2329 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2330 [20041] time: sys/time.h timespec namespace
2331 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2332 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2333 [20051] libc: ttyslot in wrong header under wrong conditions
2334 [20054] libc: gethostname not declared for XPG4
2335 [20055] libc: termios.h missing tcgetsid for XPG4
2336 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2338 [20073] libc: sys/stat.h fchmod namespace
2339 [20074] libc: stdlib.h rand_r namespace
2340 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2341 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2343 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2344 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2346 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2347 [20119] libc: Wrong mask for processors level type from CPUID
2348 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2349 AS not supporting AVX512
2350 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2352 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2353 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2355 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2356 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2357 [20178] libc: posix_spawn{p} should not call exit
2358 [20191] stdio: libio: vtables hardening
2359 [20195] string: FMA4 detection requires CPUID execution with register
2361 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2362 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2364 [20212] math: acos (sNaN) returns sNaN
2365 [20213] math: asin (sNaN) returns sNaN
2366 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2367 [20218] math: [i386] asinhl (sNaN) returns sNaN
2368 [20219] math: [i386] atanhl (sNaN) returns sNaN
2369 [20222] stdio: fopencookie: Mangle function pointers
2370 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2371 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2372 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2374 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2375 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2376 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2377 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2378 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2379 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2380 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2381 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2382 [20240] math: modf (sNaN) returns sNaN
2383 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2384 [20250] math: frexp (sNaN) returns sNaN
2385 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2386 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2388 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2389 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2390 subscript is below array bounds [-Werror=array-bounds]
2391 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2392 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2394 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2395 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2397 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2398 "invalid" exceptions
2399 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2400 [20316] localedata: id_ID: Februari instead of Pebruari
2401 [20327] string: POWER8 strcasecmp returns incorrect result
2402 [20347] math: Failure: Test: j0_downward (0xap+0)
2403 [20348] libc: FAIL: misc/tst-preadvwritev64
2404 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2405 [20350] libc: There is no test for p{read,write}64
2406 [20357] math: Incorrect cos result for 1.5174239687223976
2407 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2411 * Unicode 8.0.0 Support: Character encoding, character type info, and
2412 transliteration tables are all updated to Unicode 8.0.0, using new
2413 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2414 These updates cause user visible changes, such as the fixes for bugs
2415 89, 16061, and 18568.
2417 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2418 kernel-internal CPU set size. This means that requests that change the
2419 CPU affinity which failed before (for example, an all-ones CPU mask) will
2420 now succeed. Applications that need to determine the effective CPU
2421 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2422 setting it because the kernel can adjust it (and the previous size check
2423 would not detect this in the majority of cases).
2425 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2426 the following new symbols are used: fts64_children, fts64_close,
2427 fts64_open, fts64_read and fts64_set.
2429 * getaddrinfo now detects certain invalid responses on an internal netlink
2430 socket. If such responses are received, an affected process will
2431 terminate with an error message of "Unexpected error <number> on netlink
2432 descriptor <number>" or "Unexpected netlink response of size <number> on
2433 descriptor <number>". The most likely cause for these errors is a
2434 multi-threaded application which erroneously closes and reuses the netlink
2435 file descriptor while it is used by getaddrinfo.
2437 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2438 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2439 unnecessary serialization of memory allocation requests across threads.
2440 The defect is now corrected. Users should see a substantial increase in
2441 the concurent throughput of allocation requests for applications which
2442 trigger this bug. Affected applications typically create and
2443 destroy threads frequently. (Bug 19048 was reported and analyzed by
2446 * There is now a --disable-timezone-tools configure option for disabling the
2447 building and installing of the timezone related utilities (zic, zdump, and
2448 tzselect). This is useful for people who build the timezone data and code
2449 independent of the GNU C Library.
2451 * The obsolete header <regexp.h> has been removed. Programs that require
2452 this header must be updated to use <regex.h> instead.
2454 * The obsolete functions bdflush, create_module, get_kernel_syms,
2455 query_module and uselib are no longer available to newly linked binaries;
2456 the header <sys/kdaemon.h> has been removed. These functions and header
2457 were specific to systems using the Linux kernel and could not usefully be
2458 used with the GNU C Library on systems with version 2.6 or later of the
2461 * Optimized string, wcsmbs and memory functions for IBM z13.
2462 Implemented by Stefan Liebler.
2464 * Newly linked programs that define a variable called signgam will no longer
2465 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2466 require signgam to be set by those functions must ensure that they use the
2467 variable provided by the GNU C Library and declared in <math.h>, without
2468 defining their own copy.
2470 * The minimum GCC version that can be used to build this version of the GNU
2471 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2472 still be used to compile programs using the GNU C Library.
2474 Security related changes:
2476 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2477 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2479 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2480 the pointer guard feature. It is always enabled. Previously,
2481 LD_POINTER_GUARD could be used to disable security hardening in binaries
2482 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2485 * An integer overflow in hcreate and hcreate_r could lead to an
2486 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2488 * The catopen function no longer has unbounded stack usage. Reported by
2489 Max. (CVE-2015-8779)
2491 * The nan, nanf and nanl functions no longer have unbounded stack usage
2492 depending on the length of the string passed as an argument to the
2493 functions. Reported by Joseph Myers. (CVE-2014-9761)
2495 * A stack-based buffer overflow was found in libresolv when invoked from
2496 libnss_dns, allowing specially crafted DNS responses to seize control
2497 of execution flow in the DNS client. The buffer overflow occurs in
2498 the functions send_dg (send datagram) and send_vc (send TCP) for the
2499 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2500 family. The use of AF_UNSPEC triggers the low-level resolver code to
2501 send out two parallel queries for A and AAAA. A mismanagement of the
2502 buffers used for those queries could result in the response of a query
2503 writing beyond the alloca allocated buffer created by
2504 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2505 the overflow. Thanks to the Google Security Team and Red Hat for
2506 reporting the security impact of this issue, and Robert Holiday of
2507 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2509 The following bugs are resolved with this release:
2511 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2512 [887] math: Math library function "logb" and "nextafter" inconsistent
2513 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2514 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2515 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2516 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2518 [4404] localedata: German translation of "Alarm clock" is misleading
2519 [6799] math: nextafter() and nexttoward() doen't set errno on
2520 overflow/underflow errors
2521 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2523 [10432] nis: _nss_nis_setnetgrent assertion failure
2524 [11460] libc: fts has no LFS support
2525 [12926] network: getaddrinfo()/make_request() may spin forever
2526 [13065] nptl: Race condition in pthread barriers
2527 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2528 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2530 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2531 [14912] libc: Rename non-installed bits/*.h headers
2532 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2533 [15367] math: Let gcc use __builtin_isinf
2534 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2535 [15421] math: lgamma wrongly sets signgam for ISO C
2536 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2537 FE_INVALID with argument out of range
2538 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2540 [15786] dynamic-link: ifunc resolver functions can smash function
2542 [15918] math: Unnecessary check for equality in hypotf()
2543 [16061] localedata: Review / update transliteration data
2544 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2546 [16141] time: strptime %z offset restriction
2547 [16171] math: drem should be alias of remainder
2548 [16296] math: fegetround is pure?
2549 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2550 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2552 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2553 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2555 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2556 "Exception "Inexact" set" on ppc32
2557 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2558 [16517] math: Missing underflow exception from tanf/tan/tanl
2559 [16519] math: Missing underflow exception from sinhf
2560 [16520] math: Missing underflow exception from tanhf
2561 [16521] math: Missing underflow exception from exp2
2562 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2564 [16734] stdio: fopen calls mmap to allocate its buffer
2565 [16961] math: nan function incorrect handling of bad sequences
2566 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2567 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2568 [16985] locale: localedef: confusing error message when opening output
2570 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2571 [17197] locale: Redundant shift character in iconv conversion output at
2573 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2574 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2575 [17250] dynamic-link: static linking breaks nss loading
2576 (getaddrinfo/getpwnam/etc...)
2577 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2579 [17441] math: isnan() should use __builtin_isnan() in GCC
2580 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2581 (related to lock elision)
2582 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2583 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2584 [17887] time: strptime should be able to parse "+01:00" style timezones
2585 [17905] libc: catopen() Multiple unbounded stack allocations
2587 [18084] libc: backtrace (..., 0) dumps core on x86
2588 [18086] libc: nice() sets errno to 0 on success
2589 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2590 is too large (CVE-2015-8778)
2591 [18251] dynamic-link: SONAME missing when audit modules provides path
2592 [18265] libc: add attributes for wchar string and memory functions
2593 [18370] math: csqrt missing underflows
2594 [18421] libc: [hppa] read-only segment has dynamic relocations
2595 [18472] libc: Obsolete syscall wrappers should be compat symbols
2596 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2597 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2598 [18525] localedata: Remove locale timezone information
2599 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2600 [18568] localedata: Update locale data to Unicode 8.0
2601 [18589] locale: sort-test.sh fails at random
2602 [18595] math: ctan, ctanh missing underflows
2603 [18604] libc: assert macro-expands its argument
2604 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2605 contains a vector instruction exception.
2606 [18611] math: j1, jn missing errno setting on underflow
2607 [18618] localedata: sync Chechen locale definitions with other *_RU
2609 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2610 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2611 [18665] network: In send_dg, the recvfrom function is NOT always using the
2612 buffer size of a newly created buffer (CVE-2015-7547)
2613 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2615 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2617 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2618 [18699] math: tilegx cproj() for various complex infinities does not yield
2620 [18724] libc: Harden put*ent functions against data injection
2621 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2622 [18755] build: build errors with -DNDEBUG
2623 [18757] stdio: fmemopen fails to set errno on failure
2624 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2626 [18781] libc: openat64 lacks O_LARGEFILE
2627 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2628 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2629 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2630 [18790] math: [ldbl-128ibm] tanhl inaccurate
2631 [18795] libc: stpncpy fortification misses buffer lengths that are
2632 statically too large
2633 [18796] build: build fails for --disable-mathvec
2634 [18803] math: hypot missing underflows
2635 [18820] stdio: fmemopen may leak memory on failure
2636 [18823] math: csqrt spurious underflows
2637 [18824] math: fma spurious underflows
2638 [18825] math: pow missing underflows
2639 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2640 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2641 [18870] build: sem_open.c fails to compile with missing symbol
2643 [18872] stdio: Fix memory leak in printf_positional
2644 [18873] libc: posix_fallocate overflow check ineffective
2645 [18875] math: Excess precision leads incorrect libm
2646 [18877] libc: arm: mmap offset regression
2647 [18887] libc: memory corruption when using getmntent on blank lines
2648 [18918] localedata: hu_HU: change time to HH:MM:SS format
2649 [18921] libc: Regression: extraneous stat() and fstat() performed by
2651 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2652 binaries (CVE-2015-8777)
2653 [18951] math: tgamma missing underflows
2654 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2656 [18953] localedata: lt_LT: change currency symbol to the euro
2657 [18956] math: powf inaccuracy
2658 [18961] math: [i386] exp missing underflows
2659 [18966] math: [i386] exp10 missing underflows
2660 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2661 [18969] build: multiple string test failures due to missing locale
2663 [18970] libc: Reference of pthread_setcancelstate in libc.a
2664 [18977] math: float / long double Bessel functions not in XSI POSIX
2665 [18980] math: i386 libm functions return with excess range and precision
2666 [18981] math: i386 scalb*, ldexp return with excess range and precision
2667 [18982] stdio: va_list and vprintf
2668 [18985] time: Passing out of range data to strftime() causes a segfault
2670 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2671 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2672 [19012] locale: iconv_open leaks memory on error path
2673 [19016] math: clog, clog10 inaccuracy
2674 [19018] nptl: Mangle function pointers in tls_dtor_list
2675 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2676 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2677 [19048] malloc: malloc: arena free list can become cyclic, increasing
2679 [19049] math: [powerpc] erfc incorrect zero sign
2680 [19050] math: [powerpc] log* incorrect zero sign
2681 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2682 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2683 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2684 [19074] network: Data race in _res_hconf_reorder_addrs
2685 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2686 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2687 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2689 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2691 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2692 [19086] manual: posix_fallocate64 documented argument order is wrong.
2693 [19088] math: lround, llround missing exceptions close to overflow
2695 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2696 [19095] math: dbl-64 lrint incorrect for 64-bit long
2697 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2698 [19124] dynamic-link: ld.so failed to build with older assmebler
2699 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2700 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2701 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2702 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2703 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2704 pthread_setaffinity_np
2705 [19156] math: [ldbl-128] j0l spurious underflows
2706 [19164] nptl: tst-getcpu fails with many possible CPUs
2707 [19168] math: math/test-ildoubl and math/test-ldouble failure
2708 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2709 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2711 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2712 (FE_NOMASK_ENV) do not clear SSE exceptions
2713 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2714 _int_new_arena/reused_arena
2715 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2716 [19201] math: dbl-64 remainder incorrect sign of zero result
2717 [19205] math: bits/math-finite.h conditions do not match math.h and
2719 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2720 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2721 for C99-based standards
2722 [19212] libc: features.h not -Wundef clean
2723 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2725 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2726 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2727 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2729 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2730 "inexact" exceptions
2731 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2733 [19242] libc: strtol incorrect in Turkish locales
2734 [19243] malloc: reused_arena can pick an arena on the free list, leading
2735 to an assertion failure and reference count corruption
2736 [19253] time: tzset() ineffective when temporary TZ did not include DST
2738 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2739 [19270] math: [hppa] Shared libm missing __isnanl
2740 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2741 MAP_HUGETLB and MAP_STACK defines
2742 [19313] nptl: Wrong __cpu_mask for x32
2743 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2744 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2745 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2746 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2747 [19363] time: x32: times() return value wrongly truncates/sign extends
2749 [19367] dynamic-link: Improve branch prediction on Silvermont
2750 [19369] network: Default domain name not reset by res_ninit when "search"
2751 / "domain" entry is removed from resolv.conf
2752 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2754 [19385] localedata: bg_BG: time separator should be colon, not comma
2755 [19408] libc: linux personality syscall wrapper may erroneously return an
2756 error on 32-bit architectures
2757 [19415] libc: dladdr returns wrong names on hppa
2758 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2759 IBM905, IBM907, and IBM909
2760 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2761 [19443] build: build failures with -DDEBUG
2762 [19451] build: Make check fails on test-double-vlen2
2763 [19462] libc: Glibc failed to build with -Os
2764 [19465] math: Wrong code with -Os
2765 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2767 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2769 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2770 [19486] math: S390: Math tests fail with "Exception Inexact set".
2771 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2772 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2774 [19590] math: Fail to build shared objects that use libmvec.so functions.
2778 * The following bugs are resolved with this release:
2780 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2781 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2782 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2783 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2784 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2785 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2786 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2787 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2788 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2789 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2790 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2791 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2792 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2793 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2794 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2795 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2796 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2797 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2798 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2799 18657, 18676, 18694, 18696, 18887.
2801 * Cache information can be queried via sysconf() function on s390 e.g. with
2802 _SC_LEVEL1_ICACHE_SIZE as argument.
2804 * A buffer overflow in gethostbyname_r and related functions performing DNS
2805 requests has been fixed. If the NSS functions were called with a
2806 misaligned buffer, the buffer length change due to pointer alignment was
2807 not taken into account. This could result in application crashes or,
2808 potentially arbitrary code execution, using crafted, but syntactically
2809 valid DNS responses. (CVE-2015-1781)
2811 * The time zone file parser has been made more robust against crafted time
2812 zone files, avoiding heap buffer overflows related to the processing of
2813 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2814 large time zone data files. Overly long time zone specifiers in the TZ
2815 variable no longer result in stack overflows and crashes.
2817 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2818 for LD and GD on x86 and x86-64, has been implemented. You will need
2819 binutils-2.24 or later to enable this optimization.
2821 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2822 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2823 Hat). These updates cause user visible changes, such as the fix for bug
2826 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2827 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2828 condition in some applications.
2830 * Added vector math library named libmvec with the following vectorized x86_64
2831 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2833 The library can be disabled with --disable-mathvec. Use of the functions is
2834 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2835 Shared library libmvec.so is linked in as needed when using -lm (no need to
2836 specify -lmvec explicitly for not static builds).
2837 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2839 * A new fmemopen implementation has been added with the goal of POSIX
2840 compliance. The new implementation fixes the following long-standing
2841 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2842 old implementation is still present for use be by existing binaries.
2844 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2845 releases. It has been fixed to match 2.19 and older, but binaries built
2846 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2848 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2849 Contributed by Roland McGrath (Google).
2851 * The header <regexp.h> is deprecated, and will be removed in a future
2852 release. Use of this header will trigger a deprecation warning.
2853 Application developers should update their code to use <regex.h> instead.
2855 This header was formerly part of SUS, but was deprecated in 1994 and
2856 removed from the standard in 2001. Also, the glibc implementation
2857 leaks memory. See BZ#18681 for more details.
2861 * The following bugs are resolved with this release:
2863 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2864 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2865 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2866 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2867 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2868 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2869 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2870 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2871 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2872 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2875 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2876 too little memory for the to-be-scanned arguments and overflow the
2877 allocated buffer. The implementation now correctly computes the required
2878 buffer size when using malloc, and switches to malloc from alloca as
2881 * A new semaphore algorithm has been implemented in generic C code for all
2882 machines. Previous custom assembly implementations of semaphore were
2883 difficult to reason about or ensure that they were safe. The new version
2884 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2885 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2886 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2888 * Port to Altera Nios II has been contributed by Mentor Graphics.
2890 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2891 implementations for powerpc64/powerpc64le.
2892 Implemented by Adhemerval Zanella (IBM).
2894 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2895 and powerpc64le. This may improve lock scaling of existing programs on
2896 HTM capable systems. The lock elision code is only enabled with
2897 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2898 powerpc will issue a transaction abort on every syscall to avoid side
2899 effects being visible outside transactions.
2901 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2902 AArch64. Contributed by ARM Ltd.
2904 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2906 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2907 under certain input conditions resulting in the execution of a shell for
2908 command substitution when the application did not request it. The
2909 implementation now checks WRDE_NOCMD immediately before executing the
2910 shell and returns the error WRDE_CMDSUB as expected.
2912 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2913 processing format strings with a large number of format specifiers.
2915 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2916 infinite loop if the DNS response contained a PTR record of an unexpected
2919 * The minimum GCC version that can be used to build this version of the GNU
2920 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2921 still be used to compile programs using the GNU C Library.
2923 * The GNU C Library is now built with -Werror by default. This can be
2924 disabled by configuring with --disable-werror.
2926 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2928 * The obsolete sigvec function has been removed. This was the original
2929 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2930 programs have been using instead for about 25 years. Of course, ABI
2931 compatibility for old binaries using sigvec remains intact.
2933 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2934 with newer versions of bison.
2936 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2937 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2938 registers overlay two consecutive single-precision registers. MIPS32R2
2939 introduced a new FPU mode (FR=1) where double-precision registers extend the
2940 corresponding single-precision registers which is incompatible with the
2941 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2942 require the use of FR=1 making a transition necessary. New o32 ABI
2943 extensions enable users to migrate over time from the original o32 ABI
2944 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2945 tracks the ABI of any loaded object and verifies that new objects are
2946 compatible. Mode transitions will also be requested as required and
2947 unsupportable objects will be rejected. The ABI checks include both soft and
2948 hard float ABIs for o32, n32 and n64.
2950 GCC 5 with GNU binutils 2.25 onwards:
2951 It is strongly recommended that all o32 system libraries are built using the
2952 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2953 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2954 compiler using --with-fp-32=xx to set this by default.
2958 * The following bugs are resolved with this release:
2960 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2961 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2962 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2963 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2964 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2965 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2966 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2967 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2968 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2969 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2970 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2971 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2972 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2973 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2974 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2976 * Reverted change of ABI data structures for s390 and s390x:
2977 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2978 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2979 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
2980 are preserved pointing straight to the same implementation as the old ones.
2981 Given that, new callers will simply provide a too-big buffer to these
2982 functions. Any applications/libraries out there that embed jmp_buf or
2983 ucontext_t in an ABI-relevant data structure that have already been rebuilt
2984 against 2.19 headers will have to rebuilt again. This is necessary in any
2985 case to revert the breakage in their ABI caused by the glibc change.
2987 * Support for file description locks is added to systems running the
2988 Linux kernel. The standard file locking interfaces are extended to
2989 operate on file descriptions, not file descriptors, via the use of
2990 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
2991 are associated with an open file instead of a process.
2993 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
2995 * The minimum Linux kernel version that this version of the GNU C Library
2996 can be used with is 2.6.32.
2998 * Running the testsuite no longer terminates as soon as a test fails.
2999 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3000 with PASS or FAIL lines for individual tests. A summary of the results is
3001 printed, including a list of failing lists, and "make check" exits with
3002 error status if there were any unexpected failures. "make check
3003 stop-on-test-failure=y" may be used to keep the old behavior.
3005 * The am33 port, which had not worked for several years, has been removed
3008 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3009 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3010 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3011 conflicted with POSIX (support for which was removed in 2.19), the
3012 interfaces those macros enabled remain available when compiling with
3013 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3014 test macros defined.
3016 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3018 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3019 This may improve lock scaling of existing programs on TX capable systems.
3020 The lock elision code is only built with --enable-lock-elision=yes and
3021 then requires a GCC version supporting the TX builtins. With lock elision
3022 default mutexes are elided via __builtin_tbegin, if the cpu supports
3023 transactions. By default lock elision is not enabled and the elision code
3026 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3027 copy the path argument. This allowed programs to cause posix_spawn to
3028 deference a dangling pointer, or use an unexpected pathname argument if
3029 the string was modified after the posix_spawn_file_actions_addopen
3032 * All supported architectures now use the main glibc sysdeps directory
3033 instead of some being in a separate "ports" directory (which was
3034 distributed separately before glibc 2.17).
3036 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3037 On configurations that support it (all Linux configurations), it's now
3038 used regardless of the --enable-add-ons switch to configure. It is no
3039 longer possible to build such configurations without pthreads support.
3041 * Locale names, including those obtained from environment variables (LANG
3042 and the LC_* variables), are more tightly checked for proper syntax.
3043 setlocale will now fail (with EINVAL) for locale names that are overly
3044 long, contain slashes without starting with a slash, or contain ".." path
3045 components. (CVE-2014-0475) Previously, some valid locale names were
3046 silently replaced with the "C" locale when running in AT_SECURE mode
3047 (e.g., in a SUID program). This is no longer necessary because of the
3050 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3051 with application code using Intel MPX instructions. (With all previous
3052 versions, the MPX register state could be clobbered when making calls
3053 into or out of a shared library.) Note that while the new dynamic
3054 linker is compatible with all known x86 hardware whether or not it
3055 supports Intel MPX, some x86 instruction-set emulators might fail to
3056 handle the new instruction encodings. This is known to affect Valgrind
3057 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3058 release), and might affect other tools that do instruction emulation.
3060 * Support for loadable gconv transliteration modules has been removed.
3061 The support for transliteration modules has been non-functional for
3062 over a decade, and the removal is prompted by security defects. The
3063 normal gconv conversion modules are still supported. Transliteration
3064 with //TRANSLIT is still possible, and the //IGNORE specifier
3065 continues to be supported. (CVE-2014-5119)
3067 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3068 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3069 resulting a denial-of-service security vulnerability in applications which
3070 use functions related to iconv. (CVE-2014-6040)
3074 * The following bugs are resolved with this release:
3076 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3077 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3078 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3079 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3080 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3081 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3082 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3083 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3084 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3085 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3086 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3087 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3088 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3089 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3090 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3091 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3092 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3093 16431, 16453, 16474, 16506, 16510, 16529
3095 * Slovenian translations for glibc messages have been contributed by the
3096 Translation Project's Slovenian team of translators.
3098 * The public headers no longer use __unused nor __block. This change is to
3099 support compiling programs that are derived from BSD sources and use
3100 __unused internally, and to support compiling with Clang's -fblock
3101 extension which uses __block.
3103 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3104 large collation sequences to optimize multiple passes. This cache
3105 computation may overflow for large collation sequences and may cause a
3106 stack or buffer overflow. This is now fixed to use a slower algorithm
3107 which does not use a cache if there is an integer overflow.
3109 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3110 rules for large collation sequences to optimize multiple passes and falls
3111 back to alloca if malloc fails, resulting in a possible stack overflow.
3112 The implementation now falls back to an uncached collation sequence lookup
3115 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3116 initialized for static applications resulting in the security feature
3117 being disabled. The pointer guard is now correctly initialized to a
3118 random value for static applications. Existing static applications need
3119 to be recompiled to take advantage of the fix (bug 15754).
3121 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3122 to the d_name member of struct dirent, or omit the terminating NUL
3123 character. (Bugzilla #14699).
3125 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3126 aligned_alloc functions could allocate too few bytes or corrupt the
3127 heap when passed very large allocation size values (Bugzilla #15855,
3130 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3131 for AF_INET6 has been fixed (Bugzilla #16072).
3133 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3134 pap_CW, quz_PE, the_NP.
3136 * Substantially revised locales: gd_GB, ht_HT
3138 * The LC_ADDRESS field was updated to support country_car for almost all
3141 * ISO 1427 definitions were updated.
3143 * ISO 3166 definitions were updated.
3145 * The localedef utility now supports --big-endian and --little-endian
3146 command-line options to generate locales for a different system from that
3147 for which the C library was built.
3149 * Binary locale files now only depend on the endianness of the system for
3150 which they are generated and not on other properties of that system. As a
3151 consequence, binary files generated with new localedef may be incompatible
3152 with old versions of the GNU C Library, and binary files generated with
3153 old localedef may be incompatible with this version of the GNU C Library,
3154 in the following circumstances:
3156 + Locale files may be incompatible on m68k systems.
3158 + Locale archive files (but not separate files for individual locales) may
3159 be incompatible on systems where plain "char" is signed.
3161 * The configure option --disable-versioning has been removed. Builds with
3162 --disable-versioning had not worked for several years.
3164 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3165 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3167 * SystemTap probes for malloc have been introduced.
3169 * SystemTap probes for slow multiple precision fallback paths of
3170 transcendental functions have been introduced.
3172 * Support for powerpc64le has been added.
3174 * The soft-float powerpc port now supports e500 processors.
3176 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3178 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3179 set of header declarations that are enabled by default, even when other
3180 feature test macros or compiler options such as -std=c99 would otherwise
3181 disable some of those declarations.
3183 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3184 conflict with POSIX. The libbsd-compat library (which was a dummy library
3185 that did nothing) has also been removed.
3187 * Preliminary documentation about Multi-Thread, Async-Signal and
3188 Async-Cancel Safety has been added.
3190 * Change of ABI data structures for s390 and s390x:
3191 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3192 allow for future hardware extensions. All library functions that accept or
3193 return these structures were versioned in order to provide backwards
3194 compatibility with existing code. However, not all cases can be handled
3195 with interface versioning. If an application embeds either structure into
3196 another structure and that structure is passed to another compilation unit
3197 which expects the newer larger-sized object then any access to the new
3198 fields will result in undefined behaviour. Similarly any access to fields
3199 that were moved by the enlarging of the structures will cause undefined
3200 behaviour. To fix the undefined behaviour all objects that are part of the
3201 final in-memory image must agree on the size of structures, and this may
3202 require recompilation.
3206 * The following bugs are resolved with this release:
3208 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3209 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3210 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3211 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3212 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3213 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3214 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3215 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3216 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3217 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3218 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3219 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3220 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3223 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3224 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3225 Distributions can re-enable building and using pt_chown via the new configure
3226 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3227 considerable security risks and should only be used if the distribution
3228 understands and accepts the risks.
3230 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3233 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3234 fixed (Bugzilla #15330).
3236 * Add support for calling C++11 thread_local object destructors on thread
3237 and program exit. This needs compiler support for offloading C++11
3238 destructor calls to glibc.
3240 * Improved worst case performance of libm functions with double inputs and
3243 * Support for priority inherited mutexes in pthread condition variables on
3244 non-x86 architectures.
3246 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3248 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3250 * Optimized string functions for ARM. Implemented by Will Newton and
3253 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3255 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3258 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3259 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3261 * Added a benchmark framework to track performance of functions in glibc.
3263 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3264 It is based on draft TS 18661 and currently enabled as a GNU extension.
3266 * On Linux, the clock function now uses the clock_gettime system call
3267 for improved precision, rather than old times system call.
3269 * Added support for version-3 tz format files. This is needed when using
3270 the tz database release 2013e or later, and affects a few unusual cases --
3271 currently only TZ='America/Godthab' for time stamps after 2037.
3273 * Added new API functions pthread_getattr_default_np and
3274 pthread_setattr_default_np to get and set the default pthread
3275 attributes of a process.
3277 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3278 This may improve lock scaling of existing programs on TSX capable systems.
3279 When the --enable-lock-elision=yes parameter is specified at configure
3280 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3283 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3284 availability). Implemented by Ryan S. Arnold.
3286 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3290 * The following bugs are resolved with this release:
3292 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3293 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3294 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3295 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3296 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3297 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3298 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3299 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3300 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3301 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3302 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3303 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3304 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3305 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3306 14879, 14889, 14893, 14898, 14914.
3308 * Optimization of memcpy for MIPS.
3310 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3311 EMFILE has been fixed (Bugzilla #14889).
3313 * The add-on ports collection is now distributed in the "ports" subdirectory
3314 of the main GNU C Library distribution, rather than separately.
3316 * Port to ARM AArch64 contributed by Linaro.
3318 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3319 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3321 Implemented by Andreas Krebbel.
3323 * The new function secure_getenv allows secure access to the environment,
3324 returning NULL if running in a SUID/SGID process. This function replaces
3325 the internal function __secure_getenv.
3327 * SystemTap static probes have been added into the dynamic linker.
3328 Implemented by Gary Benson.
3330 * Optimizations of string functions strstr, strcasestr and memmem.
3331 Implemented by Maxim Kuvyrkov.
3333 * The minimum Linux kernel version that this version of the GNU C Library
3334 can be used with is 2.6.16.
3336 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3337 powerpc POWER7. Implemented by Will Schmidt.
3339 * New configure option --disable-nscd builds the C library such that it
3340 never attempts to contact the Name Service Caching Daemon (nscd).
3341 New configure option --disable-build-nscd avoids building nscd itself;
3342 this is the default if --disable-nscd is used.
3344 * Improved support for cross-compilation, including cross-testing and
3345 bootstrap builds without a previously built glibc.
3347 * Several testsuite tests are now able to test multiple IFUNC variants of an
3348 interface, rather than just testing the one that would be chooen by
3351 * New configure options --with-bugurl and --with-pkgversion, for
3352 distributors to use to embed their bug-reporting and package version
3353 information in --help and --version output.
3355 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3356 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3357 allows creation of chroots without the procfs mounted on /proc.
3359 * The `crypt' function now fails if passed salt bytes that violate the
3360 specification for those values. On Linux, the `crypt' function will
3361 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3362 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3363 when the mode is enabled.
3365 * The `clock_*' suite of functions (declared in <time.h>) is now available
3366 directly in the main C library. Previously it was necessary to link with
3367 -lrt to use these functions. This change has the effect that a
3368 single-threaded program that uses a function such as `clock_gettime' (and
3369 is not linked with -lrt) will no longer implicitly load the pthreads
3370 library at runtime and so will not suffer the overheads associated with
3371 multi-thread support in other code such as the C++ runtime library.
3373 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3378 * The following bugs are resolved with this release:
3380 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3381 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3382 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3383 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3384 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3385 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3386 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3387 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3388 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3389 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3390 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3391 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3392 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3393 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3394 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3395 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3396 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3397 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3398 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3399 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3400 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3401 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3404 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3405 configuring glibc with:
3406 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3407 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3408 Implemented by H.J. Lu.
3412 + define static_assert
3414 + do not declare gets
3416 + declare at_quick_exit and quick_exit also for ISO C11
3418 + aligned_alloc. NB: The code is deliberately allows the size parameter
3419 to not be a multiple of the alignment. This is a moronic requirement
3420 in the standard but it is only a requirement on the caller, not the
3423 + timespec_get added
3425 + uchar.h support added
3427 + CMPLX, CMPLXF, CMPLXL added
3429 Implemented by Ulrich Drepper.
3431 * Support for the IA-64 has been moved to ports.
3433 * Remove support for anything but ELF binary format
3435 * Checking versions of poll, ppoll added.
3436 Implemented by Ulrich Drepper.
3438 * More generic and 64-bit performance optimizations to math functions.
3439 Implemented by Ulrich Drepper.
3441 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3442 headers and functions available at compile time as they were before
3443 version 2.14. This option will be removed at some time in the future
3444 after the TI-RPC library becomes fully sufficient for the needs of
3445 existing applications.
3447 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3448 Note that glibc is not expected to work with any Linux kernel version
3451 * New header <sys/auxv.h> and function getauxval allowing easy access to
3452 the AT_* key-value pairs passed from the Linux kernel. The header also
3453 defines the HWCAP_* bits associated with the AT_HWCAP key.
3455 * New locales: mag_IN
3457 * New configure option --enable-systemtap builds SystemTap static probes
3458 into libc for setjmp and longjmp and into libpthread for various operations.
3459 So far the setjmp/longjmp probes and some of the libpthread probes are
3460 provided only for i*86 and x86_64.
3461 Implemented by Roland McGrath and Rayson Ho.
3463 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3465 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3468 * More optimized functions for SPARC. Implemented by David S. Miller.
3470 * Improved support for cross-compilation, especially bootstrap builds
3471 without a previously built glibc.
3473 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3474 Chris Metcalf from Tilera.
3476 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3477 now supported for ARM processors.
3479 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3480 as the name of the dynamic linker, to distinguish it from the
3481 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3483 * Support for CRIS has been removed from ports.
3485 * A new class of installed header has been documented for low-level
3486 platform-specific functionality. PowerPC added the first instance with a
3487 function to provide time base register access. Contributed by Tulio
3488 Magno Quites Machado Filho.
3490 * ix86 configurations now install header files that are consistent with
3491 what x86-64 configurations install. These same header files can be used
3492 for -m32, -m64, or -mx32 builds.
3493 Contributed by H.J. Lu.
3495 * Math library bug fixes. A thorough audit of all open math library bugs was
3496 conducted by Joseph Myers. Significant progress was made on many math
3497 library bugs resulting in more accurate exceptions and function results.
3498 Many thanks to all those that contributed including Andreas Jaeger for his
3499 patch review and work on the x87 trigonometric instruction issues.
3501 * Timezone data is no longer installed. Timezone-related binaries and scripts
3502 will continue to be installed. Users should obtain their timezone data from
3503 their distribution provider or from the tzdata package at
3504 <ftp://munnari.oz.au/pub/>.
3508 * The following bugs are resolved with this release:
3510 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3511 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3512 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3513 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3514 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3515 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3516 13484, 13506, 13515, 13523, 13524, 13538, 13540
3518 * New program pldd to list loaded object of a process
3519 Implemented by Ulrich Drepper.
3521 * Add nss_db support back to glibc. No more dependency on Berkeley db
3522 and support for initgroups lookups.
3523 Implemented by Ulrich Drepper.
3525 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3526 Contributed by HJ Lu.
3528 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3529 Contributed by HJ Lu.
3531 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3532 on x86-32 and x86-64.
3533 Contributed by Liubov Dmitrieva.
3535 * Optimized strchr and strrchr for SSE on x86-32.
3536 Contributed by Liubov Dmitrieva.
3538 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3539 for x86-64 and x86-32.
3540 Contributed by Liubov Dmitrieva.
3542 * New interfaces: scandirat, scandirat64
3543 Implemented by Ulrich Drepper.
3545 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3546 Implemented by Ulrich Drepper.
3548 * nscd now also caches the netgroup database.
3549 Implemented by Ulrich Drepper.
3551 * Integrate libm with gcc's -ffinite-math-only option.
3552 Implemented by Ulrich Drepper.
3554 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3555 to math functions. Implemented by Ulrich Drepper.
3557 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3558 Implemented by Ulrich Drepper.
3560 * New Linux interfaces: process_vm_readv, process_vm_writev
3562 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3563 Implemented by Ulrich Drepper.
3565 * Optimized nearbyint and strcasecmp for PPC.
3566 Implemented by Adhemerval Zanella.
3568 * New locales: bho_IN, unm_US, es_CU, ta_LK
3572 * The following bugs are resolved with this release:
3574 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3575 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3576 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3577 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3578 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3579 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3580 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3581 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3582 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3583 12795, 12811, 12813, 12814, 12841
3585 * The RPC implementation in libc is obsoleted. Old programs keep working
3586 but new programs cannot be linked with the routines in libc anymore.
3587 Programs in need of RPC functionality must be linked against TI-RPC.
3588 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3590 Visible changes of this change include (obviously) the inability to link
3591 programs using RPC functions without referencing the TI-RPC library and the
3592 removal of the RPC headers from the glibc headers.
3593 Implemented by Ulrich Drepper.
3595 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3596 syncfs, setns, sendmmsg
3598 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3599 yue_HK, lij_IT, mhr_RU
3601 * New encodings: CP770, CP771, CP772, CP773, CP774
3603 * New program sotruss to trace calls through PLTs
3604 Implemented by Ulrich Drepper.
3606 * The malloc hook implementation is marked deprecated and will be removed
3607 from the default implementation in the next version. The design never
3608 worked ever since the introduction of threads. Even programs which do
3609 not create threads themselves can use multiple threads created internally.
3613 * The following bugs are resolved with this release:
3615 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3616 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3617 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3618 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3621 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3623 * POWER7 optimizations: memset, memcmp, strncmp
3625 * New optimized string functions for x86-64: strnlen (SSE2),
3626 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3627 Implemented by Ulrich Drepper.
3631 * The following bugs are resolved with this release:
3633 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3634 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3635 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3636 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3637 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3638 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3639 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3640 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3642 * New interfaces: pthread_getname_np, pthread_setname_np
3644 * New Linux interface: recvmmsg
3646 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3648 * The dynamic linker now recognizes supported ABI versions from the
3649 EI_ABIVERSION field in the ELF header.
3650 Implemented by Ulrich Drepper.
3652 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3653 will not be used to fill in password fields in the passwd.byname replies.
3654 Instead it is used to synthesize the shadow.byname table, should it be
3655 missing. This is a useful mode in some installations involving Solaris.
3656 Implemented by Ulrich Drepper.
3658 * New locales: kok_IN, sq_MK, cv_RU
3662 * The following bugs are resolved with this release:
3664 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3665 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3666 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3667 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3668 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3669 10789, 10817, 10823, 10840, 10847
3671 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3673 Implemented by Ulrich Drepper.
3675 * Checking version of longjmp added that fails if an uninitialized stack
3676 frame would be created. Implemented by Ulrich Drepper.
3678 * STT_GNU_IFUNC is now supported in static executables.
3679 Implemented by H.J. Lu.
3681 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3683 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3684 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3685 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3686 Contributed by H.J. Lu.
3688 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3689 Implemented by Ulrich Drepper.
3691 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3693 Contributed by H.J. Lu.
3695 * Support for fma instruction in AVX on x86-64.
3696 Implemented by H.J. Lu and Ulrich Drepper.
3698 * AVX support in x86-64 auditing support in ld.so.
3699 Implemented by H.J. Lu.
3701 * STB_GNU_UNIQUE support added.
3702 Implemented by Ulrich Drepper.
3704 * Implement second fallback mode for optimized DNS lookup for even more
3705 broken environments. If two requests from the same port are not
3706 handled correctly close the socket and open a new one before sending
3707 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3708 can be used to select this mode right away, instead of rediscovering the
3709 necessity is every process again.
3710 Implemented by Ulrich Drepper.
3712 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3713 Implemented by Adam Tkac.
3715 * Optimized iconv conversions for S390x.
3716 Implemented by Andreas Krebbel.
3718 * Using condvars with PI mutexes is now more efficient due to kernel
3719 support for requeueing to PI futexes. NPTL support added for x86-64.
3720 Implemented by Ulrich Drepper.
3722 * New locales: ps_AF, my_MM
3726 * The following bugs are resolved with this release:
3728 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3729 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3730 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3731 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3732 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3734 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3735 Implemented by Ulrich Drepper.
3737 * New Linux interfaces: accept4, fallocate, fallocate64.
3738 Implemented by Ulrich Drepper.
3740 * Correct declarations of string function when used in C++ code. This
3741 could lead to compile errors for invalid C++ code.
3743 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3746 * New POSIX 2008 interface: psiginfo
3747 Implemented by Ulrich Drepper.
3749 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3750 Implemented by Ulrich Drepper.
3752 * Support for selecting between multiple function definitions at runtime
3753 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3755 * The libcrypt library can now use the hash function implementations in
3756 NSS. Implemented by Ulrich Drepper.
3758 * The malloc implementation can be compiled to be less memory efficient
3759 but higher performing in multi-threaded programs.
3760 Implemented by Ulrich Drepper.
3762 * New locales: nan_TW@latin, ks_IN
3764 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3765 Implemented by Ulrich Drepper.
3767 * Extended printf hook support. It is possible to use user-defined types
3768 and extend existing format specifiers.
3769 Implemented by Ulrich Drepper.
3771 * Handling for group shadow files has been added.
3772 Implemented by Ulrich Drepper.
3774 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3775 servers (the case, e.g., for some people using the built-in DNS
3776 server in ADSL modems/routers). There is a once-per-process timeout
3777 in case of a broken server. To avoid it, users can run nscd or put
3778 'options single-request' in /etc/resolv.conf.
3779 Implemented by Ulrich Drepper.
3783 * The following bugs are resolved with this release:
3785 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3786 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3787 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3788 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3789 6968, 6974, 6980, 6995, 7008, 7009, 7029
3791 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3792 up at the same time. Implemented by Ulrich Drepper.
3794 * TLS descriptors for LD and GD on x86 and x86-64.
3795 Implemented by Alexandre Oliva.
3797 * getaddrinfo now handles DCCP and UDPlite.
3798 Implemented by Ulrich Drepper.
3800 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3801 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3802 Implemented by Ulrich Drepper.
3804 * New implementation of memmem, strstr, and strcasestr which is O(n).
3805 Implemented by Eric Blake.
3807 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3809 * Implement "e" option for popen to open file descriptor with the
3810 close-on-exec flag set. Implemented by Ulrich Drepper.
3812 * Implement "b" mode for fmemopen. In this mode writes writes don't
3813 implicitly add a NUL byte and seeks from the end of the buffer really
3814 use the buffer end, not the string length as the basis.
3815 Implemented by Ulrich Drepper.
3817 * Many functions, exported and internal, now atomically set the close-on-exec
3818 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3820 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3822 Implemented by Pravin Satpute.
3824 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3828 * The following bugs are resolved with this release:
3830 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3831 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3832 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3833 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3834 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3835 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3836 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3838 * New locales: bo_CN, bo_IN, shs_CA.
3840 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3842 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3843 Implemented by Pravin Satpute.
3845 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3847 * nscd caches now all timeouts for DNS entries
3848 Implemented by Ulrich Drepper.
3850 * nscd is more efficient and wakes up less often.
3851 Implemented by Ulrich Drepper.
3853 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3854 vdprintf, and obstack_vprintf.
3855 Implemented by Jakub Jelinek.
3857 * Faster memset for x86-64.
3858 Implemented by Harsha Jagasia and H.J. Lu.
3860 * Faster memcpy on x86.
3861 Implemented by Ulrich Drepper.
3863 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3864 Implemented by Ulrich Drepper.
3866 * Faster sqrt and sqrtf implemention for some PPC variants.
3867 Implemented by Steven Munroe.
3871 * The following bugs are resolved with this release:
3873 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3874 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3875 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3876 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3877 5071, 5103, 5104, 5112, 5113, 5184, 5186
3879 * More checking functions: fread, fread_unlocked, open*, mq_open.
3880 Implemented by Jakub Jelinek and Ulrich Drepper.
3882 * Extend fortification to C++. Implemented by Jakub Jelinek.
3884 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3885 by not recognizing 'a' as a modifier when those specs are requested.
3886 Implemented by Jakub Jelinek.
3888 * PPC optimizations to math and string functions.
3889 Implemented by Steven Munroe.
3891 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3892 options to be passed. Implemented by Ulrich Drepper.
3894 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3896 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3897 Implemented by Ulrich Drepper.
3899 * Handle private futexes in the NPTL implementation.
3900 Implemented by Jakub Jelinek and Ulrich Drepper.
3902 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3903 Implemented by Roland McGrath and Ulrich Drepper.
3905 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3907 * SHA-256 and SHA-512 based password encryption.
3908 Implemented by Ulrich Drepper.
3910 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3911 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3914 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3915 Implemented by Ulrich Drepper.
3919 * The following bugs are resolved with this release:
3921 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3922 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3923 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3924 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3925 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3926 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3927 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3930 * New Linux interfaces: epoll_pwait, sched_getcpu.
3932 * New generic interfaces: strerror_l.
3934 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3938 * The following bugs are resolved with this release:
3940 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3941 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3942 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3943 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3944 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3945 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3946 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3947 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3948 3225, 3251, 3252, 3253, 3273
3950 * For Linux, the sorting of addresses returned by getaddrinfo now also
3951 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3952 Implemented by Ulrich Drepper.
3954 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3955 Implemented by Ulrich Drepper.
3957 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3959 * New iconv module for MIK. Contributed by Alexander Shopov.
3961 * For sites with broken group and/or passwd database, the auto-propagate
3962 option of nscd can prevent creating ID lookup entries from the results
3963 of a name lookup and vice versa. This usually is no problem but some
3964 site might have problems with the default behavior.
3965 Implemented by Ulrich Drepper.
3967 * Iterating over entire database in NIS can be slow. With the
3968 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3969 to trade time for memory. The entire database will be read at once.
3970 Implemented by Ulrich Drepper.
3972 * The interfaces introduced in RFC 3542 have been implemented by
3975 * Support for the new ELF hash table format was added by Ulrich Drepper.
3977 * Support for priority inheritance mutexes added by Jakub Jelinek and
3980 * Support for priority protected mutexes added by Jakub Jelinek.
3982 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
3983 or_IN, csb_PL, fy_NL, sr_ME.
3987 * More overflow detection functions.
3989 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
3990 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
3992 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
3993 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
3994 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
3995 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
3996 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
3997 by Masahide Washizawa.
3999 * It is now possible to install audit libraries for the dynamic linker using
4000 LD_AUDIT. Implemented by Ulrich Drepper.
4002 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4003 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4004 For a libc and libpthread that works well on Linux 2.4 kernels, we
4005 recommend using the stable 2.3 branch.
4007 * The new function open_wmemstream acts like open_memstream,
4008 but uses a wchar_t wide character buffer.
4010 * The new function ppoll is an improved version of poll, similar to pselect.
4012 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4013 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4014 renameat, unlinkat, linkat, symlinkat, readlinkat.
4016 * New Linux kernel system calls: unshare,
4017 inotify_init, inotify_add_watch, inotify_rm_watch.
4019 * The euidaccess function is now also known by the alias eaccess,
4020 for compatibility with some other systems.
4022 * Timezone data updated to 2006b version.
4026 * The following bugs are resolved with this release:
4028 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4029 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4030 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4031 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4032 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4033 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4035 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4037 * As of this release, GCC 4 can be used to compile the C Library.
4039 * Timezone data updated to 2005m version.
4043 * The following bugs are resolved with this release:
4045 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4046 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4047 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4048 777, 787, 821, 822, 823, 825
4050 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4054 * Support for RFC 3678. Real implementations exist only for Linux so far.
4055 Implemented by Ulrich Drepper.
4057 * nscd can now cache entries persistently. Expiring entries are reloaded.
4058 For speedups the cache can be shared in memory with client processes.
4059 Implemented by Ulrich Drepper.
4061 * nscd can now perform SELinux checks.
4062 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4064 * getaddrinfo queries are now cached. Canonical name lookup is performed
4066 Implemented by Ulrich Drepper.
4068 * The nothrow function attribute is used when headers are used by gcc when
4069 compiling C code. This can avoid significant amounts of exception
4072 * The malloc functions perform more error checking and are stricter when
4073 it comes to reacting on errors. The default action is to terminate
4074 the process after showing an error message. Implemented by Ulrich Drepper.
4076 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4077 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4079 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4080 namespaces using the new function dlmopen(). This feature is of course,
4081 like most other dynamic loading functionality, not available in statically
4082 linked applications. Implemented by Ulrich Drepper.
4084 * Low-overhead boundary checking variants of string and some stdio functions
4085 were added. These are to be used in conjunction with a gcc patch by
4086 Jakub Jelinek which adds calls to these functions if possible.
4087 Implemented by Jakub Jelinek and Ulrich Drepper.
4089 * Old code for several operating systems and machine architectures that
4090 have not been in working condition in a long time have been removed from
4091 the main source tree maintained by the GNU C Library's maintainers.
4092 These files are now reside in the separate `ports' source module
4093 that is usable as an add-on when building the library.
4097 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4098 interrogate the dynamic linker, compatible with the Solaris interface.
4100 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4101 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4103 * getifaddrs now uses the netlink interface on Linux to get its information.
4104 Implemented by Thorsten Kukuk.
4106 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4107 Implemented by Ulrich Drepper.
4109 * support for non-executable stacks on x86 has been added. Changes mostly
4112 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4115 * getaddrinfo now performs destination address selection according to
4120 * Thread-safe interfaces for many functions that access locale data
4121 were added in version 2.3, but these features were omitted from NEWS.
4122 Many functions have variants with an `_l' suffix that take a `locale_t'
4123 object as a parameter rather than consulting the current locale.
4124 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4125 create and maintain `locale_t' objects. Additionally, the new function
4126 `uselocale' sets "the current locale" (as used by functions not so
4127 parameterized) set for an individual thread. These features were added
4128 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4130 * The functions getresuid, getresgid, setresuid, and setresgid, which
4131 have long been available on Linux, are now declared in <unistd.h>
4132 and are now also available on the Hurd.
4134 * ELF thread-local storage support (TLS) now works on x86-64.
4136 * The new dynamic string token $LIB is expanded in shared library names.
4137 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4139 * Aldy Hernandez contributed complete software floating point support for
4140 PowerPC machines with no FPU.
4142 * fexecve is implemented on Linux.
4144 * The `btowc' function should work at least twice as fast due to
4145 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4147 * With approriate thread add-ons cancelable functions are now implemented
4148 in libc.so as well. No need to call the function in libpthread. This
4149 change allowed to finally disable the incorrect and expensive handling
4150 of weak definition in ld.so.
4152 * Yet more PLT entries in libc.so have been removed. We finally arrived
4153 at the bare minimum. Startup times improved appropriately.
4155 * Support for the new Linux/x86 system call interface was added. The
4156 AT_SYSINFO auxiliary vector entry is recognized and handled.
4160 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4163 * iconv (the program and the interface) now accepts empty names (excluding
4164 options like //TRANSLIT) to mean "use charset of current locale".
4166 * localedef can now transliterate characters in strings which are not in
4167 the provided charmap. The information from the input locale is used.
4169 * Prelinking support was added for ELF targets. This requires additional
4170 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4172 * Read-only stdio streams now use mmap to speed up operation by eliminating
4173 copying and buffer underflows. To use add 'm' to the mode string of
4174 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4176 * The malloc functions were completely rewritten by Wolfram Gloger based
4177 on Doug Lea's malloc-2.7.0.c.
4179 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4180 implementation of regex.
4182 * Bruno Haible upgraded the iconv and locale implementation to support
4185 * Contents of the LC_* and LANG environment variables in the CEN style are
4186 not recognized anymore. It never was used. Change by Ulrich Drepper.
4188 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4189 thread-local storage (TLS) ABI on some platforms.
4190 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4192 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4193 EUC-JISX0213, and TSCII.
4195 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4196 BSD-compatible interface for getting all network interface addresses.
4197 Implementation for IPv4 by Roland McGrath.
4199 * Loading of locale data is faster due to the introduction of a locale
4200 archive. Implemented by Roland McGrath and Ulrich Drepper.
4202 * Startup times are significantly reduced by not using exported functions
4203 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4206 * Steven Munroe contributed a port to PowerPC64/Linux.
4210 * The Hurd now uses the GNU libio implementation of stdio rather than the
4211 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4213 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4214 with the same behavior as the Linux system call of the same name.
4218 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4219 128-bit long double format.
4221 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4222 IBM1161, and IBM1162 charsets.
4224 * Andreas Jaeger contributed a port to x86-64/Linux.
4226 * Peter Bruin contributed a port to PowerPC/Hurd.
4228 * libc functions using I/O streams now can handle wide-oriented streams
4231 * optimizations in the dynamic linker. Binaries created by recent binutils
4232 versions start up quicker due to reduced time spent on relocations.
4234 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4238 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4239 asinh, atanh, j0 for the 128-bit long double format.
4241 * Bruno Haible updated all the code handling Unicode in some form to
4242 support Unicode 3.1.
4244 * Speed of regex for single-byte locales is back to previous levels.
4245 Patch by Isamu Hasegawa.
4247 * Alpha, SPARC, and IA-64 now also using floating stacks.
4249 * Startup time of internationalized applications greatly improved through
4250 iconv cache. Use iconvconfig to generate the cache file.
4251 Contributed by Ulrich Drepper.
4253 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4254 severe performance problems. Patch by David Mosberger.
4256 * The Hurd port got a lot more functionality like AIO, various stdio
4257 extensions, etc. Mainly done by Roland McGrath.
4259 * mtrace can now lookup symbols in shared libraries.
4263 * Intel's IA-64 math library is largely integrated. It provides fast and
4264 accurate implementatations for most basic and standard math functions
4265 in float, double, and long double format.
4267 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4268 and asin for the 96-bit long double format and asin, log, tan for the
4269 128-bit long double format.
4271 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4272 The basic double functions exist today. Contributed by Abraham Ziv
4273 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4274 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4276 * An asynchronous name lookup library was added. The interface is designed
4277 after POSIX AIO. The proposal was circulated beforehand to get comments.
4278 No negative ones came in. Implemented by Ulrich Drepper.
4280 * Port to S390/64bit contributed by Martin Schwidefsky
4281 <schwidefsky@de.ibm.com>.
4283 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4284 of functions for Linux/IA-64.
4286 * The RPC code is now thread safe. Threads can now use the same service
4287 of different services at the same time. Patch by Eric Norum
4288 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4290 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4291 family of functions for Linux/S390.
4293 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4294 of functions for Linux/x86.
4296 * Port to Linux/CRIS contributed by Axis Communications.
4300 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4301 we can now check for namespace violations and missing declarations. The
4302 result is that almost all headers are now Unix-compliant (as defined in
4303 the upcoming XPG6). The negative side is that some programs might need
4304 corrections, too, if they depend on the incorrect form of the headers in
4305 previous versions which defined too many symbols and included too many
4308 * regex now handles multibyte character sets correctly.
4309 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4311 * iconv (the program) does now conform to the upcoming XPG6 and handles
4312 charmaps. Instead of the charset names the path of charmaps can be
4313 provided and the conversion happens based on this data.
4314 Contributed by Ulrich Drepper.
4316 * The locale program now provides detailed information about the installed
4321 only lists the names of the supported locales
4325 provides details such as country, language, and codeset name.
4326 Contributed by Ulrich Drepper.
4330 * The gencat program now parses the input file according to the charset
4331 selected by the LC_CTYPE category. This is important for stateful
4332 character sets. To make generating catalogs easier there is a way
4333 to overwrite the charset selected by the locale: before the first
4334 message or $ quote line the catalog can contain a line like
4336 $ codeset=ISO-8859-2
4338 to select the charset (ISO-8859-2 in this case).
4340 Implemented by Shinya Hanataka and Ulrich Drepper.
4342 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4343 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4344 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4346 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4347 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4349 * The LANGUAGE environment variable is now ignored unless the locale is
4350 changed from the default "C" locale.
4352 * The usual bug fixes.
4356 * Greg McGary added runtime support for bounds checking using gcc's
4357 new -fbounded-pointers option. ix86 target is complete. PowerPC
4360 * Thorsten Kukuk added secure mode support to nscd.
4362 * The Berkeley db libraries have been removed.
4364 Related, the nss_db module is now in a separate package since it
4365 obviously requires a database library being available.
4367 * Wide character I/O streams implemented by Ulrich Drepper.
4369 * Functions from the extended socket API added by Ulrich Drepper.
4371 * Functions feenableexcept and fedisableexcept to control the
4372 behaviour of individual exceptions have been added by Andreas Jaeger.
4374 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4376 * The resolver code has been updated from bind 8.2.3-T5B which supports
4377 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4380 This change could in some situations effect backward compatibility. Since
4381 now `_res' is a thread-local instead of a global variable, modifying it
4382 in one thread does not have any effect in other threads.
4384 The resolver library was also extended to allow IPv6 as the transport
4385 protocol for the requests. This work was done by Stig Venaas.
4387 * Compatibility code for K&R C compilers has been removed from the
4388 header files. A ISO C compiler is needed to use the library
4389 (conforming to either C89 or C99 standard).
4391 * Complete rewrite of the localedef program to support multibyte character
4392 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4393 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4394 Implemented by Ulrich Drepper.
4396 Bruno Haible significantly improved the generation and use of the data
4397 structures for the wide character tables.
4399 * Plural handling in gettext implemented by Ulrich Drepper.
4401 * The utmp daemon has been removed.
4403 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4405 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4408 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4410 * POSIX barriers implemented by Kaz Kylheku.
4412 * POSIX spawn function family implemented by Ulrich Drepper.
4414 * POSIX spinlocks are now available.
4416 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4418 * the configure option --enable-kernel=X.Y.Z allows to strip out
4419 compatibility for kernel versions before X.Y.Z. This is currently only
4420 implemented for Linux.
4422 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4423 field sin6_scope_id. This means that all programs using IPv6 should be
4424 recompiled. Don't expect binary compatibility with previous glibc
4427 * various conversion modules for IBM character sets contributed by
4430 * IA-64 port by Jes Sorensen and HJ Lu.
4444 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4446 * New xdr functions are added; some rpc functions are now 64bit clean.
4448 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4450 * Fixed known incompatibilities with glibc 2.0.
4452 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4454 * Optimized a number of functions (especially the ELF dynamic loader).
4456 * Update timezone data files.
4458 * lots of charmaps corrections
4460 * some new locale definitions and charmaps
4465 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4466 conform to POSIX member type requirements. Symbol versions have been
4467 adjusted as needed within the library, and for direct use by applications,
4468 but there is potential for problems if third-party libraries use
4469 struct timeval as part of their interface. This does not present
4470 a problem for X and other "essential" system libraries.
4472 * An additional locale model to support C++ Standard Library locale
4473 model and probably more was implemented by Ulrich Drepper.
4475 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4478 * Miles Bader provided the `argp' function family to support hierachical
4479 command line argument parsing, layered on top of getopt.
4481 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4483 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4486 * scanf recognizes the %a and %A format for scanning floating point numbers.
4488 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4489 information and interfaces for the available integer types.
4491 * about 130 new math functions were added to implement the ISO C9x math
4494 * the new header <complex.h> contains definitions of the complex math
4495 functions from ISO C 9X.
4497 * the new header <tgmath.h> defines generic macros to use complex or
4498 real valued functions.
4500 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4502 * Andreas Jaeger provided a test suite for the math library.
4504 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4506 * Ulrich Drepper added character set conversion functions (iconv).
4508 * Optimized string functions have been added.
4510 * The localedata addon is now part of glibc.
4512 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4514 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4515 daemon for NSS (nscd).
4517 Missing a better place here are some numbers on improvements. Under
4518 Linux 2.1.125 un-tar-ing the kernel sources takes
4522 using local files 12.19s 6.88s 22.91s
4524 using NIS 13.92s 8.91s 26.34s
4526 using NIS & nscd 10.37s 7.34s 25.30s
4528 using NIS+ 27.57s 30.37s 640.46s
4530 using NIS+ & nscd 10.25s 7.83s 26.51s
4532 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4534 Keep in mind that non-namelookup related operations dominate above times.
4535 It was just a common complain that using NIS+ unpacking the kernel is
4538 [1] The old nscd implementation is not available anymore since it was
4539 distributed with glibc up to version 2.0.98 and thus is now replaced.
4541 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4543 * Mark Kettenis provided a Hesiod NSS module.
4545 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4546 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4548 * rcmd can now handle netgroups (Dick Streefland).
4550 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4553 * Support for the IPv6 protocol has been added to the socket API, as per the
4554 latest draft standards.
4556 * Support for Linux 2.2 has been added.
4558 * Interface changes relative to the latest 2.0.x release:
4559 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4560 addseverity NEW: Unix98
4561 alphasort64 NEW: LFS
4562 argp_err_exit_status NEW: argp, GNU ext
4563 argp_error NEW: argp, GNU ext
4564 argp_failure NEW: argp, GNU ext
4565 argp_help NEW: argp, GNU ext
4566 argp_parse NEW: argp, GNU ext
4567 argp_program_bug_address NEW: argp, GNU ext
4568 argp_program_version NEW: argp, GNU ext
4569 argp_program_version_hook NEW: argp, GNU ext
4570 argp_state_help NEW: argp, GNU ext
4571 argp_usage NEW: argp, GNU ext
4572 authdes_create NEW: Secure RPC
4573 authdes_getucred NEW: Secure RPC
4574 authdes_pk_create NEW: Secure RPC
4575 backtrace NEW: GNU ext.
4576 backtrace_symbols NEW: GNU ext.
4577 backtrace_symbols_fd NEW: GNU ext.
4579 cacosf NEW: ISO C 9x
4580 cacosh NEW: ISO C 9x
4581 cacoshf NEW: ISO C 9x
4582 cacoshl NEW: ISO C 9x
4583 cacosl NEW: ISO C 9x
4590 casinf NEW: ISO C 9x
4591 casinh NEW: ISO C 9x
4592 casinhf NEW: ISO C 9x
4593 casinhl NEW: ISO C 9x
4594 casinl NEW: ISO C 9x
4596 catanf NEW: ISO C 9x
4597 catanh NEW: ISO C 9x
4598 catanhf NEW: ISO C 9x
4599 catanhl NEW: ISO C 9x
4600 catanl NEW: ISO C 9x
4601 cbc_crypt NEW: Secure RPC
4605 ccoshf NEW: ISO C 9x
4606 ccoshl NEW: ISO C 9x
4612 cimagf NEW: ISO C 9x
4613 cimagl NEW: ISO C 9x
4614 clearerr_locked REMOVED
4615 clntunix_create NEW: sunrpc ext
4617 clog10 NEW: ISO C 9x
4618 clog10f NEW: ISO C 9x
4619 clog10l NEW: ISO C 9x
4629 cprojf NEW: ISO C 9x
4630 cprojl NEW: ISO C 9x
4632 crealf NEW: ISO C 9x
4633 creall NEW: ISO C 9x
4638 csinhf NEW: ISO C 9x
4639 csinhl NEW: ISO C 9x
4642 csqrtf NEW: ISO C 9x
4643 csqrtl NEW: ISO C 9x
4647 ctanhf NEW: ISO C 9x
4648 ctanhl NEW: ISO C 9x
4650 des_setparity NEW: Secure RPC
4651 ecb_crypt NEW: Secure RPC
4652 endutxent NEW: Unix98
4654 exp10f NEW: ISO C 9x
4655 exp10l NEW: ISO C 9x
4659 fattach NEW: STREAMS
4660 fdetach NEW: STREAMS
4664 feclearexcept NEW: ISO C 9x
4665 fegetenv NEW: ISO C 9x
4666 fegetexceptflag NEW: ISO C 9x
4667 fegetround NEW: ISO C 9x
4668 feholdexcept NEW: ISO C 9x
4670 feraiseexcept NEW: ISO C 9x
4671 ferror_locked REMOVED
4672 fesetenv NEW: ISO C 9x
4673 fesetexceptflag NEW: ISO C 9x
4674 fesetround NEW: ISO C 9x
4675 fetestexcept NEW: ISO C 9x
4676 feupdateenv NEW: ISO C 9x
4677 fflush_locked REMOVED
4681 fgets_unlocked NEW: GNU ext.
4682 fileno_locked REMOVED
4694 fputc_locked REMOVED
4695 fputs_unlocked NEW: GNU ext.
4696 fread_unlocked NEW: GNU ext.
4701 fstatvfs NEW: Unix98
4705 ftruncate64 NEW: LFS
4707 fwrite_unlocked NEW: GNU ext.
4708 gai_strerror NEW: IPv6
4712 getchar_locked REMOVED
4714 getdate_err NEW: Unix98
4715 getdate_r NEW: GNU ext.
4717 getnameinfo NEW: IPv6
4718 getnetname NEW: Secure RPC
4719 getpmsg NEW: STREAMS
4720 getpt NEW: Unix98 PTY
4721 getrlimit64 NEW: LFS
4722 getutxent NEW: Unix98
4723 getutxid NEW: Unix98
4724 getutxline NEW: Unix98
4725 glob64 NEW: GNU ext.
4726 globfree64 NEW: GNU ext.
4727 gnu_get_libc_release NEW: GNU ext.
4728 gnu_get_libc_version NEW: GNU ext.
4729 grantpt NEW: Unix98 PTY
4730 host2netname NEW: Secure RPC
4732 iconv_close NEW: iconv
4733 iconv_open NEW: iconv
4734 if_freenameindex NEW: IPv6
4735 if_indextoname NEW: IPv6
4736 if_nameindex NEW: IPv6
4737 if_nametoindex NEW: IPv6
4738 in6addr_any NEW: IPv6
4739 in6addr_loopback NEW: IPv6
4740 inet6_isipv4mapped NEW: IPv6
4741 isastream NEW: STREAMS
4742 iswblank NEW: GNU ext.
4743 key_decryptsession NEW: Secure RPC
4744 key_decryptsession_pk NEW: Secure RPC
4745 key_encryptsession NEW: Secure RPC
4746 key_encryptsession_pk NEW: Secure RPC
4747 key_gendes NEW: Secure RPC
4748 key_get_conv NEW: Secure RPC
4749 key_secretkey_is_set NEW: Secure RPC
4750 key_setnet NEW: Secure RPC
4751 key_setsecret NEW: Secure RPC
4752 llrint NEW: ISO C 9x
4753 llrintf NEW: ISO C 9x
4754 llrintl NEW: ISO C 9x
4755 llround NEW: ISO C 9x
4756 llroundf NEW: ISO C 9x
4757 llroundl NEW: ISO C 9x
4762 lrintf NEW: ISO C 9x
4763 lrintl NEW: ISO C 9x
4764 lround NEW: ISO C 9x
4765 lroundf NEW: ISO C 9x
4766 lroundl NEW: ISO C 9x
4768 makecontext NEW: Unix98
4769 mempcpy NEW: GNU ext.
4772 modify_ldt NEW: kernel
4776 nearbyint NEW: ISO C 9x
4777 nearbyintf NEW: ISO C 9x
4778 nearbyintl NEW: ISO C 9x
4779 netname2host NEW: Secure RPC
4780 netname2user NEW: Secure RPC
4781 nexttoward NEW: ISO C 9x
4782 nexttowardf NEW: ISO C 9x
4783 nexttowardl NEW: ISO C 9x
4787 passwd2des NEW: Secure RPC
4789 pow10f NEW: GNU ext.
4790 pow10l NEW: GNU ext.
4793 printf_size NEW: GNU ext.
4794 printf_size_info NEW: GNU ext.
4795 profil_counter REMOVED
4796 pthread_mutexattr_getkind_np REPLACED
4797 pthread_mutexattr_setkind_np REPLACED
4798 ptsname NEW: Unix98 PTY
4799 ptsname_r NEW: Unix98 PTY
4801 putchar_locked REMOVED
4802 putgrent NEW: GNU ext.
4804 putpmsg NEW: STREAMS
4805 pututxline NEW: Unix98
4809 readdir64_r NEW: LFS
4810 remquo NEW: ISO C 9x
4811 remquof NEW: ISO C 9x
4812 remquol NEW: ISO C 9x
4814 roundf NEW: ISO C 9x
4815 roundl NEW: ISO C 9x
4817 scalbln NEW: ISO C 9x
4818 scalblnf NEW: ISO C 9x
4819 scalblnl NEW: ISO C 9x
4821 sendfile NEW: kernel
4822 setcontext NEW: Unix98
4823 setrlimit64 NEW: LFS
4824 setutxent NEW: Unix98
4826 sigignore NEW: Unix98
4827 sigqueue NEW: POSIX.1b
4828 sigrelse NEW: Unix98
4829 sigset NEW: POSIX.1b
4830 sigtimedwait NEW: POSIX.1b
4831 sigwaitinfo NEW: POSIX.1b
4832 sincos NEW: GNU ext.
4833 sincosf NEW: GNU ext.
4834 sincosl NEW: GNU ext.
4838 strcasestr NEW: GNU ext.
4839 strtoimax NEW: ISO C 9x
4840 strtoumax NEW: ISO C 9x
4841 strverscmp NEW: GNU ext.
4842 svcauthdes_stats NEW: Secure RPC
4843 svcunix_create NEW: sunrpc etx
4844 svcunixfd_create NEW: sunrpc ext
4845 swapcontext NEW: Unix98
4846 tcgetsid NEW: Unix98 PTY
4847 tdestroy NEW: GNU ext.
4848 tgamma NEW: ISO C 9x
4849 tgammaf NEW: ISO C 9x
4850 tgammal NEW: ISO C 9x
4854 truncf NEW: ISO C 9x
4855 truncl NEW: ISO C 9x
4857 unlockpt NEW: Unix98 PTY
4858 updwtmpx NEW: Unix98
4859 user2netname NEW: Secure RPC
4860 utmpxname NEW: Unix98
4861 versionsort NEW: GNU ext.
4862 versionsort64 NEW: GNU ext.
4864 wcscasecmp NEW: GNU ext.
4865 wcsncasecmp NEW: GNU ext.
4866 wcsnlen NEW: GNU ext.
4867 wcstoimax NEW: ISO C 9x
4868 wcstoll NEW: ISO C 9x
4869 wcstoull NEW: ISO C 9x
4870 wcstoumax NEW: ISO C 9x
4872 wordexp NEW: POSIX.2
4873 wordfree NEW: POSIX.2
4874 write_profiling REMOVED
4875 xdecrypt NEW: Secure RPC
4876 xdr_authdes_cred NEW: Secure RPC
4877 xdr_authdes_verf NEW: Secure RPC
4878 xdr_cryptkeyarg NEW: Secure RPC
4879 xdr_cryptkeyarg2 NEW: Secure RPC
4880 xdr_cryptkeyres NEW: Secure RPC
4881 xdr_getcredres NEW: Secure RPC
4882 xdr_key_netstarg NEW: Secure RPC
4883 xdr_key_netstres NEW: Secure RPC
4884 xdr_keybuf NEW: Secure RPC
4885 xdr_keystatus NEW: Secure RPC
4886 xdr_netnamestr NEW: Secure RPC
4887 xdr_sizeof NEW: Secure RPC
4888 xdr_unixcred NEW: sunrpc ext
4889 xencrypt NEW: Secure RPC
4890 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4901 * inet_ntoa is thread-safe
4903 * updwtmp is moved from libutil to libc
4905 * rewrite of cbrt function
4907 * update of timezone data
4921 * add atoll function
4923 * fix complex problems in Berkeley DB code
4925 * fix math functions
4929 * fixed lots of header problems (especially Linux/GNU specific)
4931 * dynamic loader preserves all registers
4933 * Roland McGrath provided support for handling of auxiliary objects in
4934 the ELF dynamic loader.
4936 * support for parallel builds is improved
4940 * GNU extensions are no longer declared by default. To enable them you
4941 must define the macro `_GNU_SOURCE' in your program or compile with
4944 * The library has changed from using GNU ld symbol aliases to using weak
4945 symbols where available. The ELF object file format supports weak
4946 symbols; GNU ld also supports weak symbols in the a.out format. (There
4947 is also now support for other GNU ld extensions in ELF. Use the
4948 `--with-elf' option to configure to indicate you have ELF, and
4949 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4950 of many files which contained only symbol aliases, reducing the size of
4951 the source and the compiled library; many other files were renamed to
4952 less cryptic names previously occupied by the symbol alias files.
4953 There is a new header file <elf.h> for programs which operate on
4954 files in the ELF format.
4956 * Converted to Autoconf version 2, so `configure' has more options.
4957 Run `configure --help' to see the details.
4959 * The library can now be configured to build profiling, highly-optimized
4960 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4961 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4962 `configure' enable building these extra libraries. The shared library is
4963 built by default when using both ELF and GNU ld. When shared libraries
4964 are enabled, the new library `-ldl' is available for arbitrary run-time
4965 loading of shared objects; its interface is defined in <dlfcn.h>. The
4966 new header file <link.h> gives access to the internals of the run-time
4967 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4968 application of same name on other systems and it provides information
4969 about dynamically linked binaries.
4971 * The C library now provides the run-time support code for profiling
4972 executables compiled with `-pg'. Programs can control the profiling code
4973 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4974 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4975 the support for this file format was contributed by David Mosberger-Tang.
4977 * The math code has been replaced with a math library based on fdlibm from
4978 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4979 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
4980 functions. The math functions now reside in a separate library, so
4981 programs using them will need to use `-lm' their linking commands.
4983 * John C. Bowman contributed optimized ix87 assembler inline functions.
4985 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
4986 mechanism similar to that found in Solaris 2. This is now used for the
4987 group, passwd, hosts, networks, services, protocols, rpc, ethers,
4988 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
4989 file controls what services are used for each individual database. This
4990 works by loading shared libraries with names specified in `nsswitch.conf',
4991 so service modules can be changed or added at any time without even
4992 relinking any program. Currently there are the file, db, and NIS based
4993 NSS services available.
4995 * The new functions `strtoq' and `strtouq' parse integer values from
4996 strings, like `strtol' and `strtoul', but they return `long long int' and
4997 `unsigned long long int' values, respectively (64-bit quantities).
4999 * The new functions `strtof' and `strtold' parse floating-point values from
5000 strings, like `strtod', but they return `float' and `long double' values,
5001 respectively (on some machines `double' and `long double' are the same).
5003 * Ulrich Drepper has contributed new implementations of the floating-point
5004 printing and reading code used in the `printf' family of functions and
5005 `strtod', `strtof', and `strtold'. These new functions are perfectly
5006 accurate, and much faster than the old ones.
5008 * The implementation of the POSIX locale model was completely rewritten by
5009 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5010 to compile the POSIX locale definition.
5012 * The former dummy implementations of the strcoll and strxfrm function are
5013 now replaced by fully functional code contributed by Ulrich Drepper. The
5014 collation information comes from the POSIX locale definitions.
5016 * The new header <langinfo.h> defines an interface for accessing
5017 various locale-dependent data (using the locale chosen with `setlocale').
5019 * Ulrich Drepper has contributed a new suite of functions for operation on
5020 wide-character and multibyte-character strings, in <wchar.h>;
5021 and classification and case conversion of wide characters, in <wctype.h>.
5022 These new functions are conforming to the ISO C, Amendement 1 specification.
5024 * There is now a second implementation of the standard I/O library available.
5025 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5026 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5028 * You can now use positional parameter specifications in format strings
5029 for the `printf' and `scanf' families of functions. For example,
5030 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5031 ``Number 6, Mr Jones''. This is mainly useful when providing different
5032 format strings for different languages, whose grammars may dictate
5033 different orderings of the values being printed. To support this
5034 feature, the interface for `register_printf_handler' has changed; see
5035 the header file <printf.h> for details.
5037 * The `printf' and `scanf' families of functions now understand a new
5038 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5039 to group numbers as indicated by the locale; for `scanf' and friends, this
5040 says to accept as valid only a number with all the proper grouping
5041 separators in the right places. In the default "C" locale, numbers are
5042 not grouped; but locales for specific countries will define the usual
5043 conventions (i.e. separate thousands with `,' in the US locale).
5045 * The pgrp functions have been regularized, slightly incompatibly but much
5046 less confusingly. The core functions are now `getpgid' and `setpgid',
5047 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5048 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5049 provided for compatibility. There is no longer an incompatible `getpgrp'
5050 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5052 * The new header file <fts.h> and suite of functions simplify programs that
5053 operate on directory trees. This code comes from 4.4 BSD.
5055 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5056 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5057 NSS scheme used in glibc.
5059 * There is a new malloc debugging hook `__memalign_hook'.
5061 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5062 `unsigned int' in <sys/types.h>. These are for compatibility only and
5063 their use is discouraged.
5065 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5066 done differently, so that it works even without GNU ld.
5068 * New function `euidaccess' checks allowed access to a file like `access',
5069 but using the effective IDs instead of the real IDs.
5071 * The time zone data files have been updated for the latest and greatest
5072 local time conventions of the countries of the world.
5074 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5077 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5078 for formatting floating-point numbers. They are provided only for
5079 compatibility; new programs should use `sprintf' instead. There are
5080 also equivalent function for the `long double' floating-point type and
5081 all functions also exist in a reentrant form.
5083 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5084 functions for maintaining the login-record files (primarily of use to
5085 system programs such as `login'), and convenient functions for
5086 allocating and initializing a pseudo-terminal (pty) device.
5088 * Ulrich Drepper has contributed new support for System V style
5089 shared memory and IPC on systems that support it.
5091 * Ulrich Drepper has contributed several miscellaneous new functions found
5092 in System V: The `hsearch' family of functions provide an effective
5093 implementation of hash tables; `a64l' and `l64a' provide a very simple
5094 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5097 * Ulrich Drepper has contributed new reentrant counterparts for the
5098 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5100 * Ulrich Drepper has contributed new, highly-optimized versions of several
5101 string functions for the i486/Pentium family of processors.
5103 * Ulrich Drepper has updated the Linux-specific code, based largely
5104 on work done in Hongjiu Lu's version of GNU libc for Linux.
5105 The GNU library now supports Linux versions 2.0.10 and later,
5106 using the ELF object file format (i[3456]86-*-linux).
5108 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5110 * David Mosberger-Tang and Richard Henderson have ported the C library
5111 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5112 dynamic linking support for ELF/Alpha.
5114 * Richard Henderson contributed several Alpha optimized assembler function
5115 for arithmetic and string handling.
5117 * Ulrich Drepper has contributed a new set of message catalog functions to
5118 support multiple languages using the <libintl.h> interface, for use with
5119 his new package GNU gettext. Translation volunteers have contributed
5120 catalogs of the library's messages in Spanish, German, and Korean.
5122 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5123 program and the `catgets' function for reading the catalog files it
5124 creates. (The <libintl.h> interface is preferred; we include the
5125 <nl_types.h> interface using `catgets' only for source compatibility with
5126 programs already written to use it.)
5128 * New header file <values.h> gives SVID-compatible names for <limits.h>
5131 * Various new macros, declarations, and small header files for compatibility
5134 * New function `group_member' is a convenient way to check if a process has
5135 a given effective group ID.
5137 * When using GCC 2.7 and later, the socket functions are now declared in a
5138 special way so that passing an argument of type `struct sockaddr_in *',
5139 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5140 `struct sockaddr *' type, does not generate a type-clash warning.
5142 * New function `error' declared in header file <error.h> is a convenient
5143 function for printing error messages and optionally exiting; this is the
5144 canonical function used in GNU programs. The new functions `err', `warn',
5145 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5146 doing the same thing.
5148 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5149 POSIX.2 `glob' function to do ~ and {...} expansion.
5151 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5152 `clearenv' which is used in POSIX.9 is also available.
5154 * New function `getsid' returns session ID number on systems that support it.
5156 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5157 files <db.h> and <mpool.h> provide a rich set of functions for several
5158 types of simple databases stored in memory and in files, and <ndbm.h> is
5159 an old `ndbm'-compatible interface using the `db' functions. Link with
5160 `-ldb' to get these functions.
5162 * New macro `strdupa' copies a string like `strdup', but uses local stack
5163 space from `alloca' instead of dynamic heap space from `malloc'.
5165 * New function `strnlen' is like `strlen' but searches only a given maximum
5166 number of characters for the null terminator. `stpncpy', `strndup' and
5167 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5170 * New function `statfs' in header <sys/statfs.h>.
5172 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5173 provide convenient functions for operating on blocks of null-terminated
5176 * A new suite of functions in <utmp.h> handle all the details of reading
5177 and writing the utmp file.
5179 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5182 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5183 completely POSIX compliant and also implemented the extended functionality
5184 to handle alternate digit representation and alternate era date formats.
5186 * Ulrich Drepper provided an implementation of the `strptime' function
5187 defined in XPG4.2 which transforms a string into a `struct tm' value.
5189 * Paul Eggert provided the tzselect shell script as part of the timezone
5190 code. The shell script makes it easy to select the correct timezone
5193 * The implementation of the malloc family of functions is completely replaced
5194 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5195 The implementation uses the mmap function (if available) and it is
5196 optimized for the use in multi threaded programs.
5198 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5199 functions. This new functionality is usable by specifying a special
5200 salt string and it is compatible with implementation on *BSD systems.
5202 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5203 `getsubopt' to handle second level command line options, `bsd_signal'
5204 to access BSD style `signal' functionality, the obsolete `regexp' style
5207 * the `lchown' function is available on system which support this
5210 * The implementation of the shadow password handling function was contributed
5213 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5215 * POSIX.1g support was added. The <sys/select.h> header is available,
5216 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5217 implementation of `getaddrinfo'.
5221 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5223 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5224 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5226 * The new function `daemon' from 4.4 BSD is useful for server programs that
5227 want to put themselves in the background.
5229 * Joel Sherrill has contributed support for several standalone boards that
5230 run without an operating system.
5232 * `printf', `scanf' and friends now accept a `q' type modifier for long
5233 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5235 * All of the code taken from BSD (notably most of the math and networking
5236 routines) has been updated from the BSD 4.4-Lite release.
5238 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5240 * The new functions `getdomainname' and `setdomainname' fetch or change the
5241 YP/NIS domain name. These are system calls which exist on systems which
5244 * The time zone data files have been updated for the latest international
5247 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5248 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5252 * The C library now includes support for Sun RPC, from Sun's free
5253 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5254 are included. (There is still no support for YP.)
5256 * Tom Quinn has contributed a port of the C library to SGI machines running
5257 Irix 4 (mips-sgi-irix4).
5259 * The new `lockf' function is a simplified interface to the locking
5260 facilities of `fcntl', included for compatibility.
5262 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5264 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5266 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5269 * The error message printed by `assert' for a failed assertion now includes
5270 the name of the program (if using GNU ld) and the name of the calling
5271 function (with versions of GCC that support this).
5273 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5275 * The library now includes the <sys/mman.h> header file and memory
5276 management functions `mmap', `munmap', `mprotect', `msync', and
5277 `madvise', on systems that support those facilities.
5279 * The interface for `mcheck' has changed slightly: the function called to
5280 abort the program when an allocation inconsistency is detected now takes
5281 an argument that indicates the type of failure. The new function
5282 `mprobe' lets you request a consistency check for a particular block at
5283 any time (checks are normally done only when you call `free' or `realloc'
5286 * It is now possible to easily cross-compile the C library, building on one
5287 system a library to run on another machine and/or operating system. All
5288 you need to do is set the variable `HOST_CC' in `configparms' to the
5289 native compiler for programs to run on the machine you are building on (a
5290 few generator programs are used on Unix systems); set `CC' to the
5293 * The new function `fexecve' (only implemented on the GNU system) executes
5294 a program file given a file descriptor already open on the file.
5298 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5299 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5301 * You can set the variable `libprefix' in `configparms' to specify a prefix
5302 to be prepended to installed library files; this makes it easy to install
5303 the GNU C library to be linked as `-lgnuc' or whatever.
5305 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5306 copies a limited number of characters from a string, and returns the
5307 address of the last character written.
5309 * You no longer need to check for whether the installed `stddef.h' is
5310 compatible with the GNU C library. configure now checks for you.
5312 * You can now define a per-stream `fileno' function to convert the
5313 stream's cookie into an integral file descriptor.
5315 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5316 allocates zero bytes of storage, and returns a unique pointer which
5317 you can pass to `realloc' or `free'. The behavior is undefined if
5318 you dereference this pointer.
5320 * The C library now runs on Sony NEWS m68k machines running either
5321 NewsOS 3 or NewsOS 4.
5323 * The new `syscall' function is a system-dependent primitive function
5324 for invoking system calls. It has the canonical behavior on Unix
5325 systems, including unreliable return values for some calls (such as
5326 `pipe', `fork' and `getppid').
5328 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5329 to `EAGAIN', which is the preferred name. On systems whose kernels
5330 use two distinct codes, the C library now translates EWOULDBLOCK to
5331 EAGAIN in every system call function.
5335 * The GNU C Library Reference Manual is now distributed with the library.
5336 `make dvi' will produce a DVI file of the printed manual.
5337 `make info' will produce Info files that you can read on line using C-h i
5338 in Emacs or the `info' program.
5339 Please send comments on the manual to bug-glibc-manual@gnu.org.
5341 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5343 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5345 * Jason Merrill has contributed a port to the Sequent Symmetry running
5346 Dynix version 3 (i386-sequent-dynix).
5348 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5349 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5351 * New function `memory_warnings' lets you arrange to get warnings when
5352 malloc is running out of memory to allocate, like Emacs gives you.
5354 * The C library now contains the relocating allocator used in Emacs 19 for
5355 its editing buffers. This allocator (ralloc) minimizes allocation
5356 overhead and fragmentation by moving allocated regions around whenever it
5357 needs to. You always refer to a ralloc'd region with a "handle" (a
5358 pointer to a pointer--an object of type `void **').
5360 * There is a new `printf' format: `%m' gives you the string corresponding
5361 to the error code in `errno'.
5363 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5364 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5365 pass, the `a' modifier says to fill in a `char **' you pass with a
5368 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5369 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5370 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5372 * `mkstemp' is a traditional Unix function to atomically create and open a
5373 uniquely-named temporary file.
5377 * The standard location for the file that says what the local timezone is
5378 has changed again. It is now `/usr/local/etc/localtime' (or more
5379 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5381 * The distribution no longer contains any files with names longer than 14
5384 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5385 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5387 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5391 * The configuration process has changed quite a bit. The `configure'
5392 script is now used just like the configuration scripts for other GNU
5393 packages. The `sysdeps' directory hierarchy is much rearranged.
5394 The file `INSTALL' explains the new scheme in detail.
5396 * The header files no longer need to be processed into ANSI C and
5397 traditional C versions. There is just one set of files to install, and
5398 it will work with ANSI or old C compilers (including `gcc -traditional').
5400 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5401 MIPS DECStation running Ultrix 4.
5403 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5404 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5405 made itself into a shared library.
5407 * Yet further improved support for the i386, running 4.3 BSD-like systems
5408 (such as Mach 3 with the Unix single-server), or System V.
5410 * New function `strncasecmp' to do case-insensitive string comparison
5411 with limited length.
5413 * New function `strsep' is a reentrant alternative to `strtok'.
5415 * New functions `scandir' and `alphasort' for searching directories.
5417 * New function `setenv' is a better interface to `putenv'.
5419 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5420 function for traversing a directory tree.
5422 * The GNU obstack package is now also part of the C library.
5423 The new function `open_obstack_stream' creates a stdio stream that
5424 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5425 formatted output directly to an obstack.
5427 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5428 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5430 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5432 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5433 things to your strings.
5435 * There are some new test programs: test-fseek, testmb, and testrand.
5437 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5438 These ports are not finished, but are a good starting place for really
5439 supporting those systems.
5441 * `/etc/localtime' is now the standard location for the file that says what
5442 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5443 This follows the general principle that `/etc' is the place for all local
5444 configuration files.
5446 * The C library header files now use `extern "C"' when used by the C++
5447 compiler, so the C library should now work with C++ code.
5449 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5450 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5453 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5454 function which uses the `merge sort' algorithm, and is said to be
5455 significantly faster than the old GNU `qsort' function. Merge sort is
5456 now the standard `qsort' function. The new algorithm can require a lot
5457 of temporary storage; so, the old sorting function is called when the
5458 required storage is not available.
5460 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5461 provides the Unix `crypt' function, plus some other entry points.
5463 * The code and header files taken from 4.4 BSD have been updated with the
5464 latest files released from Berkeley.
5466 ----------------------------------------------------------------------
5467 Copyright information:
5469 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5471 Permission is granted to anyone to make or distribute verbatim copies
5472 of this document as received, in any medium, provided that the
5473 copyright notice and this permission notice are preserved,
5474 thus giving the recipient permission to redistribute in turn.
5476 Permission is granted to distribute modified versions
5477 of this document, or of portions of it,
5478 under the above conditions, provided also that they
5479 carry prominent notices stating who last changed them.
5482 version-control: never