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 12.1.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.1.0, 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 * The twalk_r function has been added. It is similar to the existing
20 twalk function, but it passes an additional caller-supplied argument
21 to the callback function.
23 * On Linux, the getdents64, gettid, and tgkill functions have been added.
25 * Minguo (Republic of China) calendar support has been added as an
26 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
29 * The entry for the new Japanese era has been added for ja_JP locale.
31 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
32 pvalloc, memalign, and posix_memalign fail now with total object size
33 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
34 pointer subtraction within the allocated object, where results might
35 overflow the ptrdiff_t type.
37 Deprecated and removed features, and other changes affecting compatibility:
39 * The functions clock_gettime, clock_getres, clock_settime,
40 clock_getcpuclockid, clock_nanosleep were removed from the librt library
41 for new applications (on architectures which had them). Instead, the
42 definitions in libc will be used automatically, which have been available
45 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
46 and <sys/stropts.h> have been removed.
48 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
49 resolver flag (deprecated in glibc 2.25) have been removed.
51 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
52 resolver have been removed from <resolv.h>.
54 * With --enable-bind-now, installed programs are now linked with the
57 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
58 configurations) has been removed, following the deprecation of this
59 subarchitecture in version 8 of GCC, and its removal in version 9.
61 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
62 header have been removed.
64 Changes to build and runtime requirements:
66 * GCC 6.2 or later is required to build the GNU C Library.
68 Older GCC versions and non-GNU compilers are still supported when
69 compiling programs that use the GNU C Library.
71 Security related changes:
73 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
74 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
75 has undefined behavior. On x32, the size_t argument may be passed
76 in the lower 32 bits of the 64-bit RDX register with non-zero upper
77 32 bits. When it happened with the sign bit of RDX register set,
78 memcmp gave the wrong result since it treated the size argument as
79 zero. Reported by H.J. Lu.
81 CVE-2019-9169: Attempted case-insensitive regular-expression match
82 via proceed_next_node in posix/regexec.c leads to heap-based buffer
83 over-read. Reported by Hongxu Chen.
85 The following bugs are resolved with this release:
87 [The release manager will add the list generated by
88 scripts/list-fixed-bugs.py just before the release.]
95 * The getcpu wrapper function has been added, which returns the currently
96 used CPU and NUMA node. This function is Linux-specific.
98 * A new convenience target has been added for distribution maintainers
99 to build and install all locales as directories with files. The new
100 target is run by issuing the following command in your build tree:
101 'make localedata/install-locale-files', with an optional DESTDIR
102 to set the install root if you wish to install into a non-default
105 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
107 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
108 for _GNU_SOURCE, to match BSD environments.
110 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
111 indicates that it will abort the transaction prior to entering the kernel
112 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
113 suspended, and this caused some undefined side-effects issues by aborting
114 transactions manually. Glibc avoided it by abort transactions manually on
115 each syscall, but it lead to performance issues on newer kernels where the
116 HTM state is saved and restore lazily (the state being saved even when the
117 process actually does not use HTM).
119 * The functions posix_spawn_file_actions_addchdir_np and
120 posix_spawn_file_actions_addfchdir_np have been added, enabling
121 posix_spawn and posix_spawnp to run the new process in a different
122 directory. These functions are GNU extensions. The function
123 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
126 * The popen and system do not run atfork handlers anymore (BZ#17490).
127 Although it is a possible POSIX violation, the POSIX rationale in
128 pthread_atfork documentation regarding atfork handlers is to handle
129 inconsistent mutex state after a fork call in a multi-threaded process.
130 In both popen and system there is no direct access to user-defined mutexes.
132 * Support for the C-SKY ABIV2 running on Linux has been added. This port
133 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
135 - C-SKY ABIV2 soft-float little-endian
136 - C-SKY ABIV2 hard-float little-endian
138 * strftime's default formatting of a locale's alternative year (%Ey)
139 has been changed to zero-pad the year to a minimum of two digits,
140 like "%y". This improves the display of Japanese era years during
141 the first nine years of a new era, and is expected to be harmless
142 for all other locales (only Japanese locales regularly have
143 alternative year numbers less than 10). Zero-padding can be
144 overridden with the '_' or '-' flags (which are GNU extensions).
146 * As a GNU extension, the '_' and '-' flags can now be applied to
147 "%EY" to control how the year number is formatted; they have the
148 same effect that they would on "%Ey".
150 Deprecated and removed features, and other changes affecting compatibility:
152 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
153 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
155 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
156 in <sys/procfs.h>, has been corrected to match the type actually used by
157 the Linux kernel. This affects the size and layout of that structure on
158 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
160 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
161 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
162 defined in <sys/procfs.h>, has been corrected to match the type actually
163 used by the Linux kernel. This affects the size and layout of those
166 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
167 meant to scan a string and allocate space for it with malloc, is now
168 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
169 defined. This extension conflicts with C99's use of '%a' to scan a
170 hexadecimal floating-point number, which is now available to programs
171 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
173 POSIX.1-2008 includes the feature of allocating a buffer for string input
174 with malloc, using the modifier letter 'm' instead. Programs using
175 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
176 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
177 C99 '%a' no longer need to avoid _GNU_SOURCE.
179 GCC's -Wformat warnings can detect most uses of this extension, as long
180 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
181 __attribute__ ((format (scanf, ...))).
183 Changes to build and runtime requirements:
185 * Python 3.4 or later is required to build the GNU C Library.
187 * On most architectures, GCC 5 or later is required to build the GNU C
188 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
190 Older GCC versions and non-GNU compilers are still supported when
191 compiling programs that use the GNU C Library.
193 Security related changes:
195 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
196 denial of service due to resource exhaustion when processing getaddrinfo
197 calls with crafted host names. Reported by Guido Vranken.
199 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
200 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
201 happened, accessing the 32-bit size_t value as the full 64-bit register
202 in the assembly string/memory functions would cause a buffer overflow.
205 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
206 addresses with arbitrary trailing characters, potentially leading to data
207 or command injection issues in applications.
209 The following bugs are resolved with this release:
211 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
212 [10496] localedata: 12h time representation in multiple locales faulty
213 [10797] localedata: it_IT locale numeric does not have a separator for
215 [11319] libc: dprintf doesn't handle errors properly
216 [16346] time: mktime: potentially unsafe use of localtime_offset
217 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
219 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
220 posix_spawn_file_actions_addfchdir_np
221 [17426] localedata: Indian locales: set the correct date format
222 [17490] stdio: popen should not invoke atfork handlers
223 [17783] libc: TIOCSER_TEMT conditions inconsistent
224 [18040] regex: use-after-free in regexec/get_subexp
225 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
226 [20018] network: getaddrinfo should reject IP addresses with trailing
227 characters (CVE-2016-10739)
228 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
229 [20271] libc: Missing "\n" in __libc_fatal calls
230 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
231 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
232 pointer argument is non-NULL
233 [21037] stdio: open_memstream and freopen
234 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
235 [21716] time: Crash in glibc's mktime in low-memory situations
236 [22834] stdio: Subprocess forked by popen may crash in Linux when
237 multithreads call popen
238 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
239 and pthread_create fails.
240 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
241 [23125] libc: riscv64: endless loop when throwing an exception from a
243 [23275] nptl: Race in pthread_mutex_lock while promoting to
244 PTHREAD_MUTEX_ELISION_NP.
245 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
247 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
249 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
251 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
252 [23509] dynamic-link: CET enabled glibc is incompatible with the older
254 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
255 [23521] nss: get_next_alias nss_files file stream leak
256 [23538] nptl: Hang in pthread_cond_broadcast
257 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
258 [23578] regex: Invalid memory access if regex pattern contains NUL byte
259 [23579] libc: Errors misreported in preadv2
260 [23597] build: support/test-container.c doesn't work with different
262 [23603] time: mktime signed integer overflow on large timestamps
263 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
264 [23614] libc: powerpc: missing CFI register information in __mpn_*
266 [23637] string: Generic strstr/strcasestr fails with huge needles
267 [23640] libc: no way to easily clear FD_CLOEXEC in
268 posix_spawn_file_actions_adddup2()
269 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
271 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
273 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
274 [23689] libc: Bug in documentation for rusage.ru_ixrss in
275 bits/types/struct_rusage.h
276 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
278 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
280 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
281 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
282 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
284 [23724] localedata: Albanian date formats are incorrect
285 [23735] math: libnldbl_nonshared.a references internal libm symbols
286 [23740] localedata: kl_GL: Month names and date formats need update
287 [23744] regex: regex refactorings to remove BE, avoid duplication
288 [23745] time: mktime fix for Gnulib + coreutils
289 [23758] time: Improve the width of alternate representation for year in
291 [23783] libc: [mips] Missing CMSPAR bits/termios.h
292 [23789] time: mktime does not set errno on failure
293 [23791] localedata: Wrong monetary format for ca_ES locale
294 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
295 [23794] locale: c16rtomb does not handle surrogate pairs
296 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
297 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
298 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
299 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
300 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
301 [23862] libc: [sh] missing kernel-features.h undefines
302 [23864] libc: [riscv] missing kernel-features.h undefines
303 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
304 [23907] malloc: Incorrect double-free malloc tcache check disregards
306 [23913] libc: off-by-one in function maybe_script_execute in
307 sysdeps/posix/spawni.c
308 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
309 [23923] locale: Add --no-hard-links option to localedef
310 [23927] network: Linux if_nametoindex() does not close descriptor
312 [23961] math: powf can overflow to inf without setting errno in non-
313 nearest rounding mode
314 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
315 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
316 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
317 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
318 [24011] localedata: Fixed small type in comment for locale bs_BA
319 [24018] libc: gettext() may return NULL
320 [24022] build: riscv build failure with Linux kernel 4.20-rc7
321 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
322 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
324 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
325 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
327 [24046] localedata: en_US locale doesn't define date_fmt
328 [24063] manual: @var{errno} should be @code{errno}
329 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
330 [24088] libc: VSCR field is not being correctly read in ucontext_t on
332 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
334 [24097] string: Can't use 64-bit register for size_t in assembly codes for
336 [24110] hurd: SS_DISABLE never set in stack_t value returned by
338 [24112] network: Do not send DNS queries for non-host names (where all
339 answers will be rejected)
340 [24130] libc: alpha __remqu corrupts $f3 register
347 * The localization data for ISO 14651 is updated to match the 2016
348 Edition 4 release of the standard, this matches data provided by
349 Unicode 9.0.0. This update introduces significant improvements to the
350 collation of Unicode characters. This release deviates slightly from
351 the standard in that the collation element ordering for lowercase and
352 uppercase LATIN script characters is adjusted to ensure that regular
353 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
354 is not matched by [a-z]. With the update many locales have been
355 updated to take advantage of the new collation information. The new
356 collation information has increased the size of the compiled locale
357 archive or binary locales.
359 * The GNU C Library can now be compiled with support for Intel CET, AKA
360 Intel Control-flow Enforcement Technology. When the library is built
361 with --enable-cet, the resulting glibc is protected with indirect
362 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
363 compatible with all existing executables and shared libraries. This
364 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
365 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
366 capable of multi-byte NOPs, like x86-64 processors as well as Intel
367 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
368 x86_64 and x32 on non-CET processors. --enable-cet has been tested
369 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
372 * The GNU C Library now has correct support for ABSOLUTE symbols
373 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
374 relocated incorrectly or in some cases discarded. The GNU linker can
375 make use of the newer semantics, but it must communicate it to the
376 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
377 field) to indicate such support is required.
379 * Unicode 11.0.0 Support: Character encoding, character type info, and
380 transliteration tables are all updated to Unicode 11.0.0, using
381 generator scripts contributed by Mike FABIAN (Red Hat).
383 * <math.h> functions that round their results to a narrower type are added
384 from TS 18661-1:2014 and TS 18661-3:2015:
386 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
389 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
392 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
395 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
398 * Two grammatical forms of month names are now supported for the following
399 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
400 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
401 support two grammatical forms in abbreviated month names: Catalan, Greek,
404 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
405 include the support for two grammatical forms of month names.
407 * Building and running on GNU/Hurd systems now works without out-of-tree
410 * The renameat2 function has been added, a variant of the renameat function
411 which has a flags argument. If the flags are zero, the renameat2 function
412 acts like renameat. If the flag is not zero and there is no kernel
413 support for renameat2, the function will fail with an errno value of
414 EINVAL. This is different from the existing gnulib function renameatu,
415 which performs a plain rename operation in case of a RENAME_NOREPLACE
416 flags and a non-existing destination (and therefore has a race condition
417 that can clobber the destination inadvertently).
419 * The statx function has been added, a variant of the fstatat64
420 function with an additional flags argument. If there is no direct
421 kernel support for statx, glibc provides basic stat support based on
422 the fstatat64 function.
424 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
425 library if installed. libidn2 version 2.0.5 or later is recommended. If
426 libidn2 is not available, internationalized domain names are not encoded
427 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
428 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
429 with an encoding error.) Flags which used to change the IDN encoding and
430 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
431 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
432 deprecated. They no longer have any effect.
434 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
435 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
436 range of ELF gABI expressions including such constructs as
437 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
438 have been further restricted, and where in the past a dynamic string
439 token sequence may have been interpreted as a literal string it will
440 now cause a load failure. These load failures were always considered
441 unspecified behaviour from the perspective of the dynamic loader, and
442 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
443 results in a load failure now.
445 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
446 implementation includes all the standard functions provided by
449 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
450 thrd_detach, thrd_exit, and thrd_join for thread management.
452 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
453 mtx_destroy for mutual exclusion.
455 - call_once for function call synchronization.
457 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
458 cnd_wait for conditional variables.
460 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
462 Application developers must link against libpthread to use ISO C threads.
464 Deprecated and removed features, and other changes affecting compatibility:
466 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
467 installed. Software that was using either header should be updated to
468 use standard <stdio.h> interfaces instead.
470 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
471 This was never required by the C standard, and the macros just expanded
472 to call alternative names for the same functions. If you hoped getc and
473 putc would provide performance improvements over fgetc and fputc, instead
474 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
475 necessary, flockfile and funlockfile.
477 * All stdio functions now treat end-of-file as a sticky condition. If you
478 read from a file until EOF, and then the file is enlarged by another
479 process, you must call clearerr or another function with the same effect
480 (e.g. fseek, rewind) before you can read the additional data. This
481 corrects a longstanding C99 conformance bug. It is most likely to affect
482 programs that use stdio to read interactive input from a terminal.
485 * The macros 'major', 'minor', and 'makedev' are now only available from
486 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
487 headers that happen to include <sys/types.h>. These macros are rarely
488 used, not part of POSIX nor XSI, and their names frequently collide with
489 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
492 <sys/sysmacros.h> is a GNU extension. Portable programs that require
493 these macros should first include <sys/types.h>, and then include
494 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
496 * The tilegx*-*-linux-gnu configurations are no longer supported.
498 * The obsolete function ustat is no longer available to newly linked
499 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
500 function has been deprecated in favor of fstatfs and statfs.
502 * The obsolete function nfsservctl is no longer available to newly linked
503 binaries. This function was specific to systems using the Linux kernel
504 and could not usefully be used with the GNU C Library on systems with
505 version 3.1 or later of the Linux kernel.
507 * The obsolete function name llseek is no longer available to newly linked
508 binaries. This function was specific to systems using the Linux kernel
509 and was not declared in a header. Programs should use the lseek64 name
510 for this function instead.
512 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
513 getaddrinfo and getnameinfo functions have been deprecated. The behavior
514 previously selected by them is now always enabled.
516 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
517 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
518 restriction (rejecting '_' in host names, among other things) has been
519 removed, for increased compatibility with non-IDN name resolution.
521 * The fcntl function now have a Long File Support variant named fcntl64. It
522 is added to fix some Linux Open File Description (OFD) locks usage on non
523 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
524 fcntl and LFS support is handled transparently. Also for Linux, the OFD
525 locks act as a cancellation entrypoint.
527 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
528 ecb_crypt, and des_setparity are no longer available to newly linked
529 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
530 longer installed. These functions encrypted and decrypted data with the
531 DES block cipher, which is no longer considered secure. Software that
532 still uses these functions should switch to a modern cryptography library,
535 * Reflecting the removal of the encrypt and setkey functions above, the
536 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
537 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
540 * The obsolete function fcrypt is no longer available to newly linked
541 binaries. It was just another name for the standard function crypt,
542 and it has not appeared in any header file in many years.
544 * We have tentative plans to hand off maintenance of the passphrase-hashing
545 library, libcrypt, to a separate development project that will, we hope,
546 keep up better with new passphrase-hashing algorithms. We will continue
547 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
548 'crypt_r' should not need to change at all; however, distributions will
549 need to install <crypt.h> and libcrypt from a separate project.
551 In this release, if the configure option --disable-crypt is used, glibc
552 will not install <crypt.h> or libcrypt, making room for the separate
553 project's versions of these files. The plan is to make this the default
554 behavior in a future release.
556 Changes to build and runtime requirements:
558 GNU make 4.0 or later is now required to build glibc.
560 Security related changes:
562 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
563 been fixed by removing the glibc-internal IDNA implementation and using
564 the system-provided libidn2 library instead. Originally reported by Hanno
565 Böck and Christian Weisgerber.
567 CVE-2017-18269: An SSE2-based memmove implementation for the i386
568 architecture could corrupt memory. Reported by Max Horn.
570 CVE-2018-11236: Very long pathname arguments to realpath function could
571 result in an integer overflow and buffer overflow. Reported by Alexey
574 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
575 architecture could write beyond the target buffer, resulting in a buffer
576 overflow. Reported by Andreas Schwab.
578 The following bugs are resolved with this release:
580 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
581 [6889] manual: 'PWD' mentioned but not specified
582 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
583 when __WORDSIZE != 64
584 [13762] regex: re_search etc. should return -2 on memory exhaustion
585 [13888] build: /tmp usage during testing
586 [13932] math: dbl-64 pow unexpectedly slow for some inputs
587 [14092] nptl: Support C11 threads
588 [14095] localedata: Review / update collation data from Unicode / ISO
590 [14508] libc: -Wformat warnings
591 [14553] libc: Namespace pollution loff_t in sys/types.h
592 [14890] libc: Make NT_PRFPREG canonical.
593 [15105] libc: Extra PLT references with -Os
594 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
596 [16335] manual: Feature test macro documentation incomplete and out of
598 [16552] libc: Unify umount implementations in terms of umount2
599 [17082] libc: htons et al.: statement-expressions prevent use on global
600 scope with -O1 and higher
601 [17343] libc: Signed integer overflow in /stdlib/random_r.c
602 [17438] localedata: pt_BR: wrong d_fmt delimiter
603 [17662] libc: please implement binding for the new renameat2 syscall
604 [17721] libc: __restrict defined as /* Ignore */ even in c11
605 [17979] libc: inconsistency between uchar.h and stdint.h
606 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
607 [18023] libc: extend_alloca is broken (questionable pointer comparison,
608 horrible machine code)
609 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
611 [18471] libc: llseek should be a compat symbol
612 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
614 [18991] nss: nss_files skips large entry in database
615 [19239] libc: Including stdlib.h ends up with macros major and minor being
617 [19463] libc: linknamespace failures when compiled with -Os
618 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
619 [19527] locale: Normalized charset name not recognized by setlocale
620 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
621 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
623 [19728] network: out of bounds stack read in libidn function
624 idna_to_ascii_4i (CVE-2016-6261)
625 [19729] network: out of bounds heap read on invalid utf-8 inputs in
626 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
627 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
629 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
630 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
631 [20419] dynamic-link: files with large allocated notes crash in
633 [20530] libc: bswap_16 should use __builtin_bswap16() when available
634 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
635 [20980] manual: CFLAGS environment variable replaces vital options
636 [21163] regex: Assertion failure in pop_fail_stack when executing a
637 malformed regexp (CVE-2015-8985)
638 [21234] manual: use of CFLAGS makes glibc detect no optimization
639 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
640 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
641 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
642 [21508] locale: intl/tst-gettext failure with latest msgfmt
643 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
644 [21812] network: getifaddrs() returns entries with ifa_name == NULL
645 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
647 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
649 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
650 [22247] network: Integer overflow in the decode_digit function in
651 puny_decode.c in libidn (CVE-2017-14062)
652 [22342] nscd: NSCD not properly caching netgroup
653 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
654 [22550] localedata: es_ES locale (and other es_* locales): collation
655 should treat ñ as a primary different character, sync the collation
656 for Spanish with CLDR
657 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
658 by gcc configured with --enable-default-pie
659 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
660 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
661 crossing 2GB threshold (CVE-2017-18269)
662 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
664 [22735] time: Misleading typo in time.h source comment regarding
666 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
667 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
668 `__assert_perror_fail ()' to `__assert_fail_base ()'
669 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
671 [22786] libc: Stack buffer overflow in realpath() if input size is close
672 to SSIZE_MAX (CVE-2018-11236)
673 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
674 through an absolute DT_NEEDED path
675 [22792] build: tcb-offsets.h dependency dropped
676 [22797] libc: pkey_get() uses non-reserved name of argument
677 [22807] libc: PTRACE_* constants missing for powerpc
678 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
679 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
680 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
681 [22848] localedata: ca_ES: update date definitions from CLDR
682 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
683 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
684 [22896] localedata: Update locale data for an_ES
685 [22902] math: float128 test failures with GCC 8
686 [22918] libc: multiple common of `__nss_shadow_database'
687 [22919] libc: sparc32: backtrace yields infinite backtrace with
689 [22926] libc: FTBFS on powerpcspe
690 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
692 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
693 [22947] libc: FAIL: misc/tst-preadvwritev2
694 [22963] localedata: cs_CZ: Add alternative month names
695 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
696 [22996] localedata: change LC_PAPER to en_US in es_BO locale
697 [22998] dynamic-link: execstack tests are disabled when SELinux is
699 [23005] network: Crash in __res_context_send after memory allocation
701 [23007] math: strtod cannot handle -nan
702 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
703 [23036] regex: regex equivalence class regression
704 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
705 [23069] libc: sigaction broken on riscv64-linux-gnu
706 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
707 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
708 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
709 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
710 and libc build with -Os)
711 [23140] localedata: More languages need two forms of month names
712 [23145] libc: _init/_fini aren't marked as hidden
713 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
714 [23171] math: C++ iseqsig for long double converts arguments to double
715 [23178] nscd: sudo will fail when it is run in concurrent with commands
716 that changes /etc/passwd
717 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
719 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
720 [23208] localedata: New locale - Lower Sorbian (dsb)
721 [23233] regex: Memory leak in build_charclass_op function in file
723 [23236] stdio: Harden function pointers in _IO_str_fields
724 [23250] nptl: Offset of __private_ss differs from GCC
725 [23253] math: tgamma test suite failures on i686 with -march=x86-64
726 -mtune=generic -mfpmath=sse
727 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
729 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
730 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
732 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
733 [23277] math: nan function should not have const attribute
734 [23279] math: scanf and strtod wrong for some hex floating-point
735 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
737 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
738 [23303] build: undefined reference to symbol
739 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
740 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
742 [23313] stdio: libio vtables validation and standard file object
744 [23329] libc: The __libc_freeres infrastructure is not properly run across
746 [23349] libc: Various glibc headers no longer compatible with
748 [23351] malloc: Remove unused code related to heap dumps and malloc
750 [23363] stdio: stdio-common/tst-printf.c has non-free license
751 [23396] regex: Regex equivalence regression in single-byte locales
752 [23422] localedata: oc_FR: More updates of locale data
753 [23442] build: New warning with GCC 8
754 [23448] libc: Out of bounds access in IBM-1390 converter
755 [23456] libc: Wrong index_cpu_LZCNT
756 [23458] build: tst-get-cpu-features-static isn't added to tests
757 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
759 [23467] dynamic-link: x86/CET: A property note parser bug
766 * The GNU C Library can now be compiled with support for building static
767 PIE executables (See --enable-static-pie in INSTALL). These static PIE
768 executables are like static executables but can be loaded at any address
769 and provide additional security hardening benefits at the cost of some
770 memory and performance. When the library is built with --enable-static-pie
771 the resulting libc.a is usable with GCC 8 and above to create static PIE
772 executables using the GCC option '-static-pie'. This feature is currently
773 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
774 aarch64 with binutils 2.30 or later.
776 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
777 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
780 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
782 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
784 * In order to support faster and safer process termination the malloc API
785 family of functions will no longer print a failure address and stack
786 backtrace after detecting heap corruption. The goal is to minimize the
787 amount of work done after corruption is detected and to avoid potential
788 security issues in continued process execution. Reducing shutdown time
789 leads to lower overall process restart latency, so there is benefit both
790 from a security and performance perspective.
792 * The abort function terminates the process immediately, without flushing
793 stdio streams. Previous glibc versions used to flush streams, resulting
794 in deadlocks and further data corruption. This change also affects
795 process aborts as the result of assertion failures.
797 * On platforms where long double has the IEEE binary128 format (aarch64,
798 alpha, mips64, riscv, s390 and sparc), the math library now implements
799 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
800 These are the same interfaces added in version 2.26 for some platforms where
801 this format is supported but is not the format of long double.
803 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
804 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
805 implements interfaces for that type, as defined by ISO/IEC TS
806 18661-3:2015. These are corresponding interfaces to those supported for
809 * The math library now implements interfaces for the _Float32, _Float64 and
810 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
811 corresponding interfaces to those supported for _Float128.
813 * glibc now implements the memfd_create and mlock2 functions on Linux.
815 * Support for memory protection keys was added. The <sys/mman.h> header now
816 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
819 * The copy_file_range function was added.
821 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
823 * The ldconfig utility now processes `include' directives using the C/POSIX
824 collation ordering. Previous glibc versions used locale-specific
825 ordering, the change might break systems that relied on that.
827 * Support for two grammatical forms of month names has been added.
828 In a call to strftime, the "%B" and "%b" format specifiers will now
829 produce the grammatical form required when the month is used as part
830 of a complete date. New "%OB" and "%Ob" specifiers produce the form
831 required when the month is named by itself. For instance, in Greek
832 and in many Slavic and Baltic languages, "%B" will produce the month
833 in genitive case, and "%OB" will produce the month in nominative case.
835 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
836 are all valid and will all accept any known form of month
837 name---standalone or complete, abbreviated or full. In a call to
838 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
839 the strings used by "%B" and "%b", respectively. New query
840 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
841 used by "%OB" and "%Ob", respectively.
843 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
844 define the strings for %OB and %Ob, respectively; these have the
845 same syntax as "mon" and "abmon". These arrays are optional; if they
846 are not provided then they have the same content as "mon" and "abmon",
849 These features are provided for locales which define "alt_mon" and/or
850 "ab_alt_mon" in their locale source data. This release includes such
851 alternative month name data for the following languages: Belarusian,
852 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
854 This feature is currently a GNU extension, but it is expected to
855 be added to the next revision of POSIX, and it is also already
856 available on some BSD-derived operating systems.
858 This feature will cause existing statically compiled applications
859 to fail to load locales and fall back to the builtin C/POSIX locales.
860 See notes below for other changes affecting compatibility.
862 * Support for the RISC-V ISA running on Linux has been added. This port
863 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
864 for the following ISA and ABI pairs:
870 Deprecated and removed features, and other changes affecting compatibility:
872 * Statically compiled applications attempting to load locales compiled for the
873 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
874 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
875 support for two grammatical forms of the month names, also extends the locale
876 data binary format. Static applications needing locale support must be
877 recompiled to match the runtime and data they are deployed with. In some
878 distributions there is an upgrade window where dynamically linked applications
879 may use a new library but the old locale data and also fall back to the
880 builtin C/POSIX locales; restarting the application process is sufficient to
883 * Support for statically linked applications which call dlopen is deprecated
884 and will be removed in a future version of glibc. Applications which call
885 dlopen need to be linked dynamically instead.
887 * Support for old programs which use internal stdio data structures and
888 functions is deprecated. This includes programs which use the C++ streams
889 provided by libstdc++ in GCC 2.95. Programs which use the internal
890 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
891 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
892 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
893 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
894 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
895 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
896 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
897 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
898 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
899 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
900 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
901 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
902 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
903 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
904 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
905 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
906 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
907 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
908 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
909 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
910 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
911 future version of glibc. Unlike other symbol removals, these old
912 applications will not be supported using compatibility symbols.
914 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
915 defined by <sys/ptrace.h>.
917 * libm no longer supports SVID error handling (calling a user-provided
918 matherr function on error) or the _LIB_VERSION variable to control error
919 handling. (SVID error handling and the _LIB_VERSION variable still work
920 for binaries linked against older versions of the GNU C Library.) The
921 libieee.a library is no longer provided. math.h no longer defines struct
922 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
923 TLOSS, PLOSS and HUGE.
925 * The libm functions pow10, pow10f and pow10l are no longer supported for
926 new programs. Programs should use the standard names exp10, exp10f and
927 exp10l for these functions instead.
929 * The mcontext_t type is no longer the same as struct sigcontext. On
930 platforms where it was previously the same, this changes the C++ name
931 mangling for interfaces involving this type.
933 * The add-ons mechanism for building additional packages at the same time as
934 glibc has been removed. The --enable-add-ons configure option is now
937 * The --without-fp configure option is now ignored. Whether hardware
938 floating-point instructions are used is now configured based on whether
939 the compiler used at configure time (without any options implied by a
940 --with-cpu= configure option) uses such instructions.
942 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
943 the specified string can be parsed as a domain name.
945 * In the malloc_info output, the <heap> element may contain another <aspace>
946 element, "subheaps", which contains the number of sub-heaps.
948 * The libresolv function p_secstodate is no longer supported for new
951 * The tilepro-*-linux-gnu configuration is no longer supported.
953 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
954 and will be removed in a future release. Software that is still using
955 either header should be updated to use standard <stdio.h> interfaces
958 libio.h was originally the header for a set of supported GNU extensions,
959 but they have not been maintained as such in many years, they are now
960 standing in the way of improvements to stdio, and we don't think there are
961 any remaining external users. _G_config.h was never intended for public
962 use, but predates the bits convention.
964 Changes to build and runtime requirements:
966 * bison version 2.7 or later is required to generate code in the 'intl'
969 Security related changes:
971 CVE-2009-5064: The ldd script would sometimes run the program under
972 examination directly, without preventing code execution through the
973 dynamic linker. (The glibc project disputes that this is a security
974 vulnerability; only trusted binaries must be examined using the ldd
977 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
978 suffered from a one-byte overflow during ~ operator processing (either
979 on the stack or the heap, depending on the length of the user name).
980 Reported by Tim Rühsen.
982 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
983 would sometimes fail to free memory allocated during ~ operator
984 processing, leading to a memory leak and, potentially, to a denial
987 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
988 without GLOB_NOESCAPE, could write past the end of a buffer while
989 unescaping user names. Reported by Tim Rühsen.
991 CVE-2017-17426: The malloc function, when called with an object size near
992 the value SIZE_MAX, would return a pointer to a buffer which is too small,
993 instead of NULL. This was a regression introduced with the new malloc
994 thread cache in glibc 2.26. Reported by Iain Buclaw.
996 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
997 to the allocation of too much memory. (This is not a security bug per se,
998 it is mentioned here only because of the CVE assignment.) Reported by
1001 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1002 of the number of search path components. (This is not a security
1003 vulnerability per se because no trust boundary is crossed if the fix for
1004 CVE-2017-1000366 has been applied, but it is mentioned here only because
1005 of the CVE assignment.) Reported by Qualys.
1007 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1008 for AT_SECURE or SUID binaries could be used to load libraries from the
1011 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1012 succeeds without returning an absolute path due to unexpected behaviour
1013 of the Linux kernel getcwd syscall. Reported by halfdog.
1015 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1016 an object size near the value of SIZE_MAX, would return a pointer to a
1017 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1019 CVE-2018-6551: The malloc function, when called with an object size near
1020 the value of SIZE_MAX, would return a pointer to a buffer which is too
1021 small, instead of NULL.
1023 The following bugs are resolved with this release:
1025 [866] glob: glob should match dangling symlinks
1026 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1027 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1029 [5997] math: Very slow execution of sinf function
1030 [10580] localedata: hr_HR: updated locale
1031 [10871] locale: 'mon' array should contain both nominative and genitive
1033 [12349] localedata: eu_ES: incorrect thousands separator
1034 [13605] localedata: shn_MM: new Shan locale
1035 [13805] localedata: ru_RU: currency should use ',' as radix point
1036 [13953] localedata: km_KH: locale update
1037 [13994] localedata: mjw_IN: new locale
1038 [14121] build: make writes .mo files in po directory
1039 [14333] libc: Fix the race between atexit() and exit()
1040 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1041 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1043 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1044 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1045 width Latin characters
1046 [15332] localedata: es_CU: locale update
1047 [15436] stdio: Don't close or flush stdio streams on abort
1048 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1050 [16148] localedata: ca_ES: incorrect thousands separator
1051 [16750] dynamic-link: ldd should not try to execute the binaries
1053 [16777] localedata: pl_PL: incorrect thousands separator in locale
1054 [16905] localedata: hanzi: new collation
1055 [17563] localedata: cmn_TW: add hanzi collation
1056 [17750] localedata: wrong collation order of diacritics in most locales
1057 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1059 [17956] build: Build fails on missing definitions from header file
1060 nss/nss.h when Mozilla NSS is used for cryptography
1061 [18203] libc: realpath() does not handle unreachable paths correctly
1062 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1063 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1064 [18822] libc: Internal functions are called via PLT
1065 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1066 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1067 [19574] libc: glibc should support building static PIE binaries
1068 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1070 [19971] glob: glob: Do not skip entries with zero d_ino values
1071 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1072 [20008] localedata: km_KH: convert to translit_neutral
1073 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1074 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1075 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1076 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1077 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1079 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1080 they're set, wrong errors returned by gaih_inet when lookup functions
1082 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1083 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1085 [20952] localedata: yuw_PG: new locale
1086 [21084] localedata: charmaps/IBM858: new codepage
1087 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1088 [21242] libc: assert gives pedantic warning in old gcc versions
1089 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1090 __regcall calling convention
1091 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1092 [21326] libc: C99 functions are not declared for C++11 and later if
1093 _GNU_SOURCE is not predefined by g++
1094 [21457] libc: sys/ucontext.h namespace
1095 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1096 [21660] math: GCC fails to compile a formula with tgmath.h
1097 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1098 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1099 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1100 [21684] math: tgmath.h handling of complex integers
1101 [21685] math: tgmath.h handling of bit-fields
1102 [21686] math: tgmath.h handling of __int128
1103 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1105 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1107 [21750] localedata: column width of characters incompatible with classical
1109 [21754] malloc: malloc: Perform as little work as possible after heap
1110 consistency check failures
1111 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1112 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1113 [21791] string: Unused XXX_chk_XXX functions in libc.a
1114 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1116 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1118 [21845] localedata: Added new Locale bho_NP
1119 [21853] localedata: Fix abday Which looks same as day in zh_SG
1120 [21854] localedata: Added New Locale en_SC
1121 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1122 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1123 _dl_runtime_resolve_avx_slow
1124 [21885] network: getaddrinfo: gethosts does not release resolver context
1125 on memory allocation failure
1126 [21899] libc: XPG4.2 sigaction namespace
1127 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1129 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1131 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1132 errno value, causing getaddrinfo to fail
1133 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1134 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1135 instead of EAI_NODATA
1136 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1137 constant PTRACE_SEIZE_DEVEL
1138 [21930] math: C-only gcc builtins used in <math.h> isinf
1139 [21932] network: Unpaired __resolv_context_get in generic get*_r
1141 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1142 [21944] libc: sigval namespace
1143 [21951] localedata: Update hanzi collation by stroke
1144 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1145 sysdeps/x86_64/fpu/e_expf.S
1146 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1147 allocation in syscall loops)
1148 [21959] localedata: Fix Country name for xh_ZA
1149 [21960] localedata: Fix abmon for bem_ZM
1150 [21966] math: AVX2 mathvec functions use FMA without checking
1151 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1152 [21971] localedata: Added New Locale for mfe_MU
1153 [21972] libc: assert macro requires operator== (int) for its argument type
1154 [21973] math: [sparc] libm missing sqrtl compat symbol
1155 [21974] libc: Remove __bb_init_func and __bb_exit_func
1156 [21982] string: stratcliff.c: error: assuming signed overflow does not
1158 [21986] stdio: __guess_grouping is called incorrectly
1159 [21987] math: [sparc32] wrong bits/long-double.h installed
1160 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1162 [22022] localedata: Missing country_name for mni_IN
1163 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1165 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1167 [22026] locale: iconv_open: heap overflow on gconv_init failure
1168 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1169 [22035] math: [m68k] bits/math-inline.h macro namespace
1170 [22038] localedata: Fix abbreviated weeks and months for Somali
1171 [22044] localedata: Remove redundant data for Limburgish Language
1172 [22050] malloc: Linking with -lmcheck does not hook
1173 __malloc_initialize_hook correctly
1174 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1175 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1176 [22070] localedata: charmaps/UTF-8: wcwidth for
1177 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1178 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1179 Jungseong and Jongseong) should be 0
1180 [22078] nss: nss_files performance issue in multi mode
1181 [22082] math: bits/math-finite.h exp10 condition
1182 [22086] libc: pcprofiledump incorrect cross-endian condition
1183 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1184 [22095] network: Name server address allocation memory leak in resolv.conf
1186 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1188 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1189 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1191 [22111] malloc: malloc: per thread cache is not returned when thread exits
1192 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1193 [22134] libc: [linux] implement fexecve with execveat
1194 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1196 [22145] libc: ttyname() gives up too early in the face of namespaces
1197 [22146] math: C++ build issue with float128 on x86_64
1198 [22153] nptl: nptl: save error code before process termination
1199 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1200 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1201 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1202 [22165] libc: [hppa] Text relocations in libc.so
1203 [22180] libc: destructor registered via __cxa_atexit is called twice
1204 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1205 symlinks") cause "make" segfaults
1206 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1208 [22207] libc: FAIL: stdlib/test-atexit-race
1209 [22225] math: nearbyint arithmetic moved before feholdexcept
1210 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1211 [22235] math: iscanonical in C++ and float128
1212 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1213 the svid compat wrapper
1214 [22244] math: ynf and yn are wrong without the svid compat wrapper
1215 [22273] libc: Improper assert in Linux posix_spawn implementation
1216 [22284] libc: -pg -pie doesn't work
1217 [22292] locale: localedef exits with error 4 when it should be error 1
1218 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1219 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1221 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1222 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1224 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1225 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1226 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1227 [22322] libc: [mips64] wrong bits/long-double.h installed
1228 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1229 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1231 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1232 [22343] malloc: Integer overflow in posix_memalign
1233 [22347] libc: getrandom() returns the number of bytes that were copied to
1234 the buffer even though the comments say "Return 0 on success and -1 on
1236 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1237 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1239 [22370] dynamic-link: Incorrect note padding check
1240 [22375] libc: malloc returns pointer from tcache_get when should return
1241 NULL (CVE-2017-17426)
1242 [22377] math: iseqsig, float128 and C++
1243 [22382] localedata: Error in tpi_PG locale
1244 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1245 inside the ASCII printable range
1246 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1248 [22403] localedata: Slash needs escaping in some locales
1249 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1250 [22409] network: res_hnok does not accept some host names used on the
1252 [22412] network: res_dnok, res_hnok should perform syntax checks
1253 [22413] network: ns_name_pton ignores syntactically invalid trailing
1255 [22415] stdio: setvbuf can lead to invalid free/segfault
1256 [22432] build: Non-deterministic build
1257 [22439] malloc: malloc_info should compute summary statistics for all sub-
1259 [22442] network: if_nametoindex could report index for the wrong
1260 networking interface
1261 [22446] build: aliasing violation calling readlink in handle_request
1262 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1263 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1264 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1265 __nscd_hash/__nss_hash
1266 [22463] network: p_secstodate overflow handling
1267 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1268 [22478] libc: sigwait can fail with EINTR
1269 [22505] libc: ldconfig processes include directive in locale-specific
1271 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1272 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1273 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1274 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1275 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1276 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1277 same as for Croatian
1278 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1279 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1280 [22577] libc: missing newline after "cannot allocate TLS data structures
1282 [22588] manual: manual/conf.texi: missing underscore in front of
1284 [22593] math: nextafter and nexttoward are declared with const attribute
1285 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1286 [22603] string: ia64 memchr overflows internal pointer check
1287 [22605] libc: SH clone does not set the exit code correctly
1288 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1290 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1291 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1292 modified in case of success
1293 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1294 [22615] manual: manual: ambiguous wording about errno value in case of
1296 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1298 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1299 binaries or if /proc is not mounted (CVE-2017-16997)
1300 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1301 [22630] build: $(no-pie-ldflag) is no longer effective
1302 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1303 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1304 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1305 [22637] nptl: guard size is subtracted from thread stack size instead of
1307 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1308 [22657] localedata: hu_HU: Avoid double space in date
1309 [22660] math: fmax, fmin sNaN handling on alpha
1310 [22664] libc: New warning of GCC8
1311 [22665] math: alpha: ceil and floor raise inexact exceptions
1312 [22666] math: alpha: trunc raise inexact exceptions
1313 [22667] libc: makecontext lacks stack alignment on i386
1314 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1315 [22679] libc: getcwd(3) can succeed without returning an absolute path
1317 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1318 elision and tunables
1319 [22687] math: [powerpc-nofpu] complex long double functions spurious
1321 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1322 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1323 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1325 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1326 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1328 [22701] nis: Incomplete removal of libnsl
1329 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1330 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1331 [22715] dynamic-link: FAIL: elf/tst-audit10
1332 [22719] libc: Backtrace tests fail on hppa
1333 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1334 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1335 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1336 before the first call to crypt_r () in crypt/badsalttest.c
1343 * A per-thread cache has been added to malloc. Access to the cache requires
1344 no locks and therefore significantly accelerates the fast path to allocate
1345 and free small amounts of memory. Refilling an empty cache requires locking
1346 the underlying arena. Performance measurements show significant gains in a
1347 wide variety of user workloads. Workloads were captured using a special
1348 instrumented malloc and analyzed with a malloc simulator. Contributed by
1349 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1351 * Unicode 10.0.0 Support: Character encoding, character type info, and
1352 transliteration tables are all updated to Unicode 10.0.0, using
1353 generator scripts contributed by Mike FABIAN (Red Hat).
1354 These updates cause user visible changes, especially the changes in
1355 wcwidth for many emoji characters cause problems when emoji sequences
1356 are rendered with pango, see for example:
1357 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1359 * Collation of Hungarian has been overhauled and is now consistent with "The
1360 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1363 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1365 - The GNU C Library will now detect when /etc/resolv.conf has been
1366 modified and reload the changed configuration. The new resolver option
1367 “no-reload” (RES_NORELOAD) disables this behavior.
1369 - The GNU C Library now supports an arbitrary number of search domains
1370 (configured using the “search” directive in /etc/resolv.conf);
1371 previously, there was a hard limit of six domains. For backward
1372 compatibility, applications that directly modify the ‘_res’ global
1373 object are still limited to six search domains.
1375 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
1376 Library will now randomly pick a name server from the configuration as a
1377 starting point. (Previously, the second name server was always used.)
1379 * The tunables feature is now enabled by default. This allows users to tweak
1380 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1382 * New function reallocarray, which resizes an allocated block (like realloc)
1383 to the product of two sizes, with a guaranteed clean failure upon integer
1384 overflow in the multiplication. Originally from OpenBSD, contributed by
1385 Dennis Wölfing and Rüdiger Sonderfeld.
1387 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1388 These are extended versions of preadv and pwritev, respectively, taking an
1389 additional flags argument. The set of supported flags depends on the
1390 running kernel; full support currently requires kernel 4.7 or later.
1392 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1393 create a new session ID for the spawned process. This feature is
1394 scheduled to be added to the next major revision of POSIX; for the time
1395 being, it is available under _GNU_SOURCE.
1397 * errno.h is now safe to use from C-preprocessed assembly language on all
1398 supported operating systems. In this context, it will only define the
1399 Exxxx constants, as preprocessor macros expanding to integer literals.
1401 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1402 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1403 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1404 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1406 To compile programs that use this feature, the compiler must support
1407 128-bit floating point with the type name _Float128 (as defined by TS
1408 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1409 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1410 must be defined to make the new interfaces visible.
1412 The new functions and macros correspond to those present for other
1413 floating-point types (except for a few obsolescent interfaces not
1414 supported for the new type), with F128 or f128 suffixes; for example,
1415 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1416 printf or scanf formats for the new type; the strfromf128 and strtof128
1417 interfaces should be used instead.
1419 Deprecated and removed features, and other changes affecting compatibility:
1421 * The synchronization that pthread_spin_unlock performs has been changed to
1422 now be equivalent to a C11 atomic store with release memory order to the
1423 spin lock's memory location. Previously, several (but not all)
1424 architectures used stronger synchronization (e.g., containing what is
1425 often called a full barrier). This change can improve performance, but
1426 may affect odd fringe uses of spin locks that depend on the previous
1427 behavior (e.g., using spin locks as atomic variables to try to implement
1428 Dekker's mutual exclusion algorithm).
1430 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1433 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1434 will only be built and installed when the GNU C Library is configured with
1435 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1436 as TIRPC or rpcsvc-proto, to be used.
1438 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1439 libnss_compat, are deprecated, and will not be built or installed by
1442 The NIS(+) support library, libnsl, is also deprecated. By default, a
1443 compatibility shared library will be built and installed, but not headers
1444 or development libraries. Only a few NIS-related programs require this
1445 library. (In particular, the GNU C Library has never required programs
1446 that use 'gethostbyname' to be linked with libnsl.)
1448 Replacement implementations based on TIRPC, which additionally support
1449 IPv6, are available from <https://github.com/thkukuk/>. The configure
1450 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1451 name service modules, to be built and installed.
1453 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1454 support is enabled, the configured recursive resolver must support EDNS.
1455 (Responding to EDNS-enabled queries with responses which are not
1456 EDNS-enabled is fine, but FORMERR responses are not.)
1458 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1459 servers have not supported this opcode for a long time.
1461 * The _res_opcodes variable has been removed from libresolv. It had been
1462 exported by accident.
1464 * <string.h> no longer includes inline versions of any string functions,
1465 as this kind of optimization is better done by the compiler. The macros
1466 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1468 * The nonstandard header <xlocale.h> has been removed. Most programs should
1469 use <locale.h> instead. If you have a specific need for the definition of
1470 locale_t with no other declarations, please contact
1471 libc-alpha@sourceware.org and explain.
1473 * The obsolete header <sys/ultrasound.h> has been removed.
1475 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1477 * The obsolete function cfree has been removed. Applications should use
1480 * The stack_t type no longer has the name struct sigaltstack. This changes
1481 the C++ name mangling for interfaces involving this type.
1483 * The ucontext_t type no longer has the name struct ucontext. This changes
1484 the C++ name mangling for interfaces involving this type.
1486 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1487 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1488 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1489 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1490 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1491 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1492 fpregset_t type no longer has the name struct fpu. This changes the C++
1493 name mangling for interfaces involving those types.
1495 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1496 synced with the kernel:
1498 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1499 are not supported on this architecture and have been removed.
1501 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1502 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1503 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1505 Programs that assume the GET/SETREGS ptrace requests are universally
1506 available will now fail to build, instead of malfunctioning at runtime.
1508 Changes to build and runtime requirements:
1510 * Linux kernel 3.2 or later is required at runtime, on all architectures
1511 supported by that kernel. (This is a change from version 2.25 only for
1514 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1516 * On most architectures, GCC 4.9 or later is required to build the GNU C
1517 Library. On powerpc64le, GCC 6.2 or later is required.
1519 Older GCC versions and non-GNU compilers are still supported when
1520 compiling programs that use the GNU C Library. (We do not know exactly
1521 how old, and some GNU extensions to C may be _de facto_ required. If you
1522 are interested in helping us make this statement less vague, please
1523 contact libc-alpha@sourceware.org.)
1525 Security related changes:
1527 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1528 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1530 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1531 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1533 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1534 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1537 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1538 fixed (CVE-2017-12133).
1540 The following bugs are resolved with this release:
1542 [984] network: Respond to changed resolv.conf in gethostbyname
1543 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1544 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1546 [12189] libc: __stack_chk_fail should not attempt a backtrace
1548 [14096] time: Race condition on timezone/tst-timezone.out
1549 [14172] localedata: az_IR: new locale
1550 [14995] build: glibc fails to build if gold is the default linker, even if
1552 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1553 [16637] network: inet_pton function is accepting IPv6 with bad format
1554 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1555 x86 and other generic code
1556 [16875] localedata: ko_KR: fix lang_name
1557 [17225] localedata: ar_SY: localized month names for May and June are
1559 [17297] localedata: da_DK: wrong date_fmt string
1560 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1561 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1562 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1563 [19066] localedata: ar_SA abbreviated day and month names are in English
1564 [19569] network: resolv: Support an arbitrary number of search domains
1565 [19570] network: Implement random DNS server selection in the stub
1567 [19838] locale: localedef fails on PA-RISC
1568 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1569 order of 0D36 and 0D37
1570 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1572 [20098] libc: FAIL: debug/backtrace-tst on hppa
1573 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1575 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1577 [20313] localedata: Update locale data to Unicode 9.0
1578 [20424] manual: Document how to provide a malloc replacement
1579 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1581 [20686] locale: Add el_GR@euro to SUPPORTED.
1582 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1583 failures consistently
1584 [21015] dynamic-link: Document and fix --enable-bind-now
1585 [21016] nptl: pthread_cond support is broken on hppa
1586 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1587 frame-pointer on i386
1588 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1590 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1591 [21088] libc: Build fails with --enable-static-nss
1592 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1593 generic c code is used
1594 [21109] libc: Tunables broken on big-endian
1595 [21112] math: powf has large ulp errors with base close to 1 and exponent
1597 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1599 [21120] malloc: glibc malloc is incompatible with GCC 7
1600 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1602 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1603 (-0.0) when linking with -lieee
1604 [21171] math: log10, log2 and lgamma return incorrect results
1605 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1606 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1607 [21207] localedata: ce_RU: update weekdays from CLDR
1608 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1609 [21217] localedata: Update months from CLDR-31
1610 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1611 [21243] libc: support_delete_temp_file should issue warning for failed
1613 [21244] libc: support resolv_test_start() socket fd close should be
1615 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1616 new posix_spawn implementation
1617 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1618 leads to lower CPU frequency
1619 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1620 [21261] libc: [sparc64] bits/setjmp.h namespace
1621 [21267] network: [mips] bits/socket.h IOC* namespace
1622 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1623 [21270] libc: mmap64 silently truncates large offset values
1624 [21275] libc: posix_spawn always crashes on ia64 now
1625 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1626 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1627 [21289] libc: Incorrect declaration for 32-bit platforms with
1628 _FILE_OFFSET_BITS=64 causes build error
1629 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1630 not support gethostbyname4_r
1631 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1633 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1635 [21340] libc: Support POSIX_SPAWN_SETSID
1636 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1637 [21359] network: ns_name_pack needs additional byte in destination buffer
1638 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1639 against fragmentation attacks (CVE-2017-12132)
1640 [21369] network: resolv: Remove EDNS fallback
1641 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1643 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1644 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1645 [21393] stdio: Missing dup3 error check in freopen, freopen64
1646 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1647 [21399] localedata: Bad description for U00EC in
1648 localedata/charmaps/CP1254
1649 [21411] malloc: realloc documentation error
1650 [21426] network: sys/socket.h uio.h namespace
1651 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1652 [21445] libc: signal.h bsd_signal namespace
1653 [21455] network: Network headers stdint.h namespace
1654 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1656 [21475] network: resolv: Overlong search path is truncated mid-label
1657 [21511] libc: sigstack namespace
1658 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1659 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1660 bits/syscall.h: No such file or directory
1661 [21517] libc: struct sigaltstack namespace
1662 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1663 [21533] localedata: Update locale data to Unicode 10.0
1665 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1666 junk at end of line, first unrecognized character is `@'
1667 [21538] libc: SIG_HOLD missing for XPG4
1668 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1669 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1670 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1671 [21543] libc: sigevent namespace
1672 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1673 size for general purpose registers in mcontext_t structure
1674 [21550] libc: sigwait namespace
1675 [21552] libc: XPG4 bsd_signal namespace
1676 [21554] libc: sigpause namespace
1677 [21560] libc: sys/wait.h signal.h namespace
1678 [21561] libc: waitid namespace
1679 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1680 '/usr/include/stdlib.h': Permission denied
1681 [21575] libc: sys/wait.h missing struct rusage definition
1682 [21584] libc: sigaltstack etc namespace
1683 [21597] libc: siginterrupt namespace
1684 [21607] math: hppa: FAIL: math/test-tgmath
1685 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1687 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1688 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1689 stack and heap (CVE-2017-1000366)
1690 [21625] libc: wait3 namespace
1691 [21654] nss: Incorrect pointer alignment in NSS group merge result
1693 [21657] network: Parse interface zone id for node-local multicast
1694 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1696 [21666] libc: .symver is used on common symbol
1697 [21668] network: resolv: res_init cross-thread broadcast introduces race
1699 [21687] math: tgmath.h totalorder, totalordermag return type
1700 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1702 [21696] libc: Incorrect assumption of of __cpu_mask in
1703 posix/sched_cpucount.c
1704 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1705 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1707 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1708 leading to relocation crash
1709 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1710 `resolv_conf_matches (resp, conf)' failed.
1711 [21710] localedata: Added Samoan language locale for Samoa
1712 [21711] localedata: Pashto yesstr/nostr locale are missing
1713 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1714 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1715 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1716 [21723] localedata: yesstr/nostr missing for Chinese language locale
1717 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1719 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1721 [21728] localedata: New Locale for Tongan language
1722 [21729] localedata: incorrect LC_NAME fields for hi_IN
1723 [21733] localedata: yesstr and nostr are missing for zh_HK
1724 [21734] localedata: Missing yesstr and nostr are for kw_GB
1725 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1726 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1727 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1728 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1730 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1732 [21749] localedata: Wrong abbreviated day name (“abday”) for
1734 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1735 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1736 [21759] localedata: missing yesstr and nostr for Tigrinya
1737 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1738 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1739 [21767] localedata: Missing Bislama locales
1740 [21768] localedata: Missing yesstr and nostr for aa_ET
1741 [21770] localedata: Missing Field in li_NL
1742 [21778] nptl: Robust mutex may deadlock
1743 [21779] libc: MicroBlaze segfaults when loading libpthread
1744 [21783] localedata: Fix int_select international_call_prefixes
1745 [21784] localedata: Inconsistency in country_isbn
1746 [21788] localedata: Missing Country Postal Abbreviations
1747 [21794] localedata: Added-country_isbn-for-Italy
1748 [21795] localedata: Add/Fix country_isbn for France
1749 [21796] localedata: Added country_isbn for Republic of Korea
1750 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1751 [21799] localedata: Added int_select international_call_prefixes
1752 [21801] localedata: Added int_select international_call_prefixes
1753 [21804] nptl: Double semicolon in thread-shared-types.h
1754 [21807] localedata: LC_ADDRESS fix for pap_CW
1755 [21808] localedata: Fix LC_ADDRESS for pap_AW
1756 [21821] localedata: Added country_name in mai_IN
1757 [21822] localedata: Fix LC_TIME for mai_IN
1758 [21823] localedata: missing yesstr, nostr for sa_IN
1759 [21825] localedata: Fix name_mrs for mag_IN
1760 [21828] localedata: 2.26 changelog should mention user visible changes
1762 [21835] localedata: Added Maithili language locale for Nepal
1763 [21838] localedata: Removed redundant data for the_NP
1764 [21839] localedata: Fix LC_MONETARY for ta_LK
1765 [21844] localedata: Fix Latin characters and Months Sequence.
1766 [21848] localedata: Fix mai_NP Title Name
1771 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1772 24731-2:2010, is supported to enable declarations of functions from that
1773 TR. Note that not all functions from that TR are supported by the GNU C
1776 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1777 18661-1:2014, is supported to enable declarations of functions and macros
1778 from that TS. Note that not all features from that TS are supported by
1781 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1782 18661-4:2015, is supported to enable declarations of functions and macros
1783 from that TS. Note that most features from that TS are not supported by
1786 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1787 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1788 Since the GNU C Library defaults to a much newer revision of POSIX, this
1789 will only affect programs that specifically request an old conformance
1790 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1791 see a change in the visible declarations, but a program compiled with
1792 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1795 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1796 defined by all multithreaded code, but glibc has not required this for
1799 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1800 means that in a future release, the macros “major”, “minor”, and “makedev”
1801 will only be available from <sys/sysmacros.h>.
1803 These macros are not part of POSIX nor XSI, and their names frequently
1804 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1805 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1806 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1809 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1810 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1811 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1813 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1814 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1815 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1816 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1817 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1818 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1819 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1820 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1821 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1822 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1823 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1826 * New <math.h> features are added from TS 18661-1:2014:
1828 - Signaling NaN macros: SNANF, SNAN, SNANL.
1830 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1831 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1832 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1834 - llogb functions: the llogb, llogbf and llogbl functions, and the
1835 FP_LLOGB0 and FP_LLOGBNAN macros.
1837 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1840 - Comparison macros: iseqsig.
1842 - Classification macros: iscanonical, issubnormal, iszero.
1844 - Total order functions: totalorder, totalorderf, totalorderl,
1845 totalordermag, totalordermagf, totalordermagl.
1847 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1849 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1850 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1852 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1853 are added to libc. They convert a floating-point number into string.
1855 * Most of glibc can now be built with the stack smashing protector enabled.
1856 It is recommended to build glibc with --enable-stack-protector=strong.
1857 Implemented by Nick Alcock (Oracle).
1859 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1860 intended to be used instead of memset() to erase sensitive data after use;
1861 the compiler will not optimize out calls to explicit_bzero even if they
1862 are "unnecessary" (in the sense that no _correct_ program can observe the
1863 effects of the memory clear).
1865 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1866 to float instead of double. This does not affect the ABI of any libraries
1867 that are part of the GNU C Library, but may affect the ABI of other
1868 libraries that use this type in their interfaces.
1870 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1871 float_t and double_t types are now defined to long double instead of float
1872 and double. These options are not the default, and this does not affect
1873 the ABI of any libraries that are part of the GNU C Library, but it may
1874 affect the ABI of other libraries that use this type in their interfaces,
1875 if they are compiled or used with those options.
1877 * The getentropy and getrandom functions, and the <sys/random.h> header file
1880 * The buffer size for byte-oriented stdio streams is now limited to 8192
1881 bytes by default. Previously, on Linux, the default buffer size on most
1882 file systems was 4096 bytes (and thus remains unchanged), except on
1883 network file systems, where the buffer size was unpredictable and could be
1884 as large as several megabytes.
1886 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1887 for the Linux quota interface which predates kernel version 2.4.22 has
1890 * The malloc_get_state and malloc_set_state functions have been removed.
1891 Already-existing binaries that dynamically link to these functions will
1892 get a hidden implementation in which malloc_get_state is a stub. As far
1893 as we know, these functions are used only by GNU Emacs and this change
1894 will not adversely affect already-built Emacs executables. Any undumped
1895 Emacs executables, which normally exist only during an Emacs build, should
1896 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1898 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1899 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1900 “no-ip6-dotint” had already been the default, and support for the
1901 “ip6-dotint” option was removed from the Internet in 2006.
1903 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1904 flag from <resolv.h> have been removed. The option relied on a
1905 backwards-incompatible DNS extension which was never deployed on the
1908 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1909 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1910 They were already unimplemented.
1912 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1913 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1914 removed again from the IETF name lookup interface specification in RFC
1915 2553. Applications should use getaddrinfo instead.
1917 * DNSSEC-related declarations and definitions have been removed from the
1918 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1919 decode the data part of DNSSEC record types. Previous versions of glibc
1920 only implemented minimal support for the previous version of DNSSEC, which
1921 is incompatible with the currently deployed version.
1923 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1924 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1925 <arpa/nameser.h> header file because the distinction between RR types and
1926 meta-RR types is not officially standardized, subject to revision, and
1927 thus not suitable for encoding in a macro.
1929 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1930 and rhook members of the res_state type in <resolv.h> have been removed.
1931 The glibc stub resolver did not support these hooks, but the header file
1932 did not reflect that.
1934 * For multi-arch support it is recommended to use a GCC which has
1935 been built with support for GNU indirect functions. This ensures
1936 that correct debugging information is generated for functions
1937 selected by IFUNC resolvers. This support can either be enabled by
1938 configuring GCC with '--enable-gnu-indirect-function', or by
1939 enabling it by default by setting 'default_gnu_indirect_function'
1940 variable for a particular architecture in the GCC source file
1943 * GDB pretty printers have been added for mutex and condition variable
1944 structures in POSIX Threads. When installed and loaded in gdb these pretty
1945 printers show various pthread variables in human-readable form when read
1946 using the 'print' or 'display' commands in gdb.
1948 * Tunables feature added to allow tweaking of the runtime for an application
1949 program. This feature can be enabled with the '--enable-tunables' configure
1950 flag. The GNU C Library manual has details on usage and README.tunables has
1951 instructions on adding new tunables to the library.
1953 * A new version of condition variables functions have been implemented in
1954 the NPTL implementation of POSIX Threads to provide stronger ordering
1957 * A new version of pthread_rwlock functions have been implemented to use a more
1958 scalable algorithm primarily through not using a critical section anymore to
1961 Security related changes:
1963 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1964 have been created with makecontext could fail to terminate due to a
1965 missing .cantunwind annotation. This has been observed to lead to a hang
1966 (denial of service) in some Go applications compiled with gccgo. Reported
1967 by Andreas Schwab. (CVE-2016-6323)
1969 * The DNS stub resolver functions would crash due to a NULL pointer
1970 dereference when processing a query with a valid DNS question type which
1971 was used internally in the implementation. The stub resolver now uses a
1972 question type which is outside the range of valid question type values.
1975 The following bugs are resolved with this release:
1977 [4099] stdio: Overly agressive caching by stream i/o functions.
1978 [7065] build: Support building glibc with -fstack-protector or -fstack-
1980 [9842] localedata: en_CA: incorrect date format
1981 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1982 before it started waiting
1983 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1984 [15765] nptl: sem_open is wrongly a cancellation point
1985 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1986 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1988 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1989 library linked with pthread
1990 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1991 "FIXME: Ingo" issue)
1992 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1993 [17252] libc: getrandom and getentropy syscall
1994 [17730] malloc: thread-local storage is sometimes improperly free()'d
1995 after being __libc_memalign()'d
1996 [18241] stdio: failed fseek on memstream does not set errno and can fail
1998 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2000 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2001 PTHREAD_PRIO_INHERIT mutex on ARM
2002 [18784] network: res_query and related function crash for special record
2003 type queries (CVE-2015-5180)
2004 [19380] math: strtod does not raise "inexact"
2005 [19387] string: Integer overflow in memchr
2006 [19390] string: Integer overflow in strncat
2007 [19398] build: linknamespace tests fail with massively parallel build
2008 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2010 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2011 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2012 [19514] libc: [PATCH] Fix spelling errors in spelling
2013 "implement"/"implementation" in several places
2014 [19582] network: Deprecate RES_USE_INET6
2015 [19673] manual: clog10 docs appear to be erroneous
2016 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2017 causes a segmentation fault
2018 [19826] libc: invalid pointer returned from __tls_get_addr with static
2020 [20016] network: resolv: Remove hooks support from the API
2021 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2023 [20033] math: [x86_64] vectorized math function don't call the __finite
2025 [20116] nptl: use after free in pthread_create
2026 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2027 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2029 [20311] nptl: please install proc_service.h
2030 [20366] libc: Compilation errors in installed headers in strict-compliance
2032 [20370] malloc: malloc: Arena free list management is still racy
2033 (incorrect fix in bug 19243)
2034 [20386] libc: assert (X = 0) does not result in GCC warning
2035 [20432] malloc: malloc: Minimize interface required for interposition
2036 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2037 in _Unwind_Backtrace (CVE-2016-6323)
2038 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2039 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2041 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2042 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2043 [20477] network: resolv: incorrect double-checked locking related to
2045 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2047 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2049 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2050 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2051 cause transition penalty
2052 [20517] math: sparcv9 missing fdiml compat symbol
2053 [20524] manual: strverscmp is inconsistent
2054 [20525] libc: <sys/quota.h> should be based on kernel headers
2055 [20539] math: GCC 7 -static -lm fails to link at -O3
2056 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2058 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2060 [20591] network: Remove obsolete DNSSEC support
2061 [20592] network: DNS resource record type classification macros in
2062 <arpa/nameser.h> are incorrect
2063 [20593] network: Update DNS RR type definitions
2064 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2065 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2067 [20629] network: libresolv: Remove support for bitstring labels
2069 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2070 assertion: "maxidx >= 2"
2071 [20660] math: [arm] Use VSQRT
2072 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2073 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2074 [20689] libc: Test for FMA should also check for AVX.
2075 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2076 [20715] math: iszero macro breaks existing code
2077 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2078 [20728] libc: powerpc: Missing TOC stub in clone
2079 [20729] build: glibc-2.24 fails to build for i486 with -Os
2080 [20750] build: Build fails with default PIE enabled gcc-6.x
2081 [20768] math: [alpha] sqrt fegetenv namespace
2082 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2084 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2085 __FLT_EVAL_METHOD__ is 2
2086 [20790] network: rpcgen buffer overrun in get_prog_declaration
2087 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2088 [20829] libc: crypt snprintf namespace
2089 [20847] libc: tst-vfork3 failure
2090 [20855] math: Default bits/mathdef.h has inappropriate float_t
2091 [20859] math: [sh4] FP_ILOGB0 invalid
2092 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2093 U+20AC), not same as GBK
2094 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2095 [20916] math: pow handling of sNaN arguments
2096 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2097 [20919] math: Bad pow (qNaN, 0) result with -lieee
2098 [20940] math: hypot sNaN handling
2099 [20947] math: fmax, fmin sNaN handling
2100 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2101 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2103 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2104 [20973] nptl: robust mutexes: Lost wake-ups
2105 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2106 [20978] nis: strlen on null pointer in nss_nisplus
2107 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2109 [21014] string: i686 memchr overflows internal pointer check
2110 [21019] libc: [mips] n32 lseek incorrect on overflow
2111 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2112 [21026] libc: [MIPS] readahead syscall is broken on n64
2113 [21028] math: Fallback fesetexceptflag should always succeed
2114 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2115 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2117 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2118 [21061] librt: [microblaze] librt lost clock_* exports
2119 [21073] libc: tunables: insecure environment variables passed to
2120 subprocesses with AT_SECURE
2121 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2125 * The minimum Linux kernel version that this version of the GNU C Library
2126 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2127 kernel version 2.6.32 or later suffices (on architectures that already
2128 required kernel versions more recent than 3.2, those requirements remain
2129 unchanged). Linux 3.2 or later kernel headers are required on all
2132 * The pap_AN locale has been deleted. This has been deprecated for a long
2133 time. It has been replaced by pap_AW & pap_CW, both of which have long
2134 been included in previous releases.
2136 * The readdir_r and readdir64_r functions have been deprecated. It is
2137 recommended to use readdir and readdir64 instead.
2139 * The type “union wait” has been removed. It was deprecated in the early
2140 1990s and never part of POSIX. Application code should use the int type
2141 instead of “union wait”.
2143 * A new NSS action is added to facilitate large distributed system
2144 administration. The action, MERGE, allows remote user stores like LDAP
2145 to be merged into local user stores like /etc/groups in order to provide
2146 easy to use, updated, and managed sets of merged credentials. The new
2147 action can be used by configuring it in /etc/nsswitch.conf:
2148 group: files [SUCCESS=merge] nis
2149 Implemented by Stephen Gallagher (Red Hat).
2151 * The deprecated __malloc_initialize_hook variable has been removed from the
2154 * The long unused localedef --old-style option has been removed. It hasn't
2155 done anything in over 16 years. Scripts using this option can safely
2158 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2159 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2160 return the next representable value in the direction of positive infinity
2161 and the nextdown functions return the next representable value in the
2162 direction of negative infinity. These are currently enabled as GNU
2165 Security related changes:
2167 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2168 could result in a stack overflow when getnetbyname was called with an
2169 overly long name. (CVE-2016-3075)
2171 * Previously, getaddrinfo copied large amounts of address data to the stack,
2172 even after the fix for CVE-2013-4458 has been applied, potentially
2173 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2174 instead. Reported by Michael Petlan. (CVE-2016-3706)
2176 * The glob function suffered from a stack-based buffer overflow when it was
2177 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2178 Reported by Alexander Cherepanov. (CVE-2016-1234)
2180 * The Sun RPC UDP client could exhaust all available stack space when
2181 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2182 alloca plugin for GCC. (CVE-2016-4429)
2184 * The IPv6 name server management code in libresolv could result in a memory
2185 leak for each thread which is created, performs a failing naming lookup,
2186 and exits. Over time, this could result in a denial of service due to
2187 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2189 The following bugs are resolved with this release:
2191 [1170] localedata: ne_NP: update Nepali locale definition file
2192 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2194 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2195 [6796] math: fdim() does not set errno on overflow
2196 [10354] libc: posix_spawn should use vfork() in more cases than presently
2197 [11213] localedata: localedata: add copyright disclaimer to locale files
2198 [12143] localedata: chr_US: new Cherokee locale
2199 [12450] localedata: sgs_LT: new locale
2200 [12676] localedata: ln_CD: new locale
2201 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2203 [13304] math: fma, fmaf, fmal produce wrong results
2204 [14259] build: --localedir arg to configure is ignored
2205 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2206 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2207 [14934] localedata: es_CL: wrong first weekday chilean locale
2208 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2210 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2212 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2213 [15368] nptl: raise() is not async-signal-safe
2214 [15479] math: ceil, floor, round and trunc raise inexact exception
2215 [15578] localedata: kk_KZ: various updates
2216 [16003] localedata: pap_AN: punt old locale
2217 [16137] localedata: iw_IL: punt old locale
2218 [16190] localedata: eo: new esperanto locale
2219 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2220 [16742] malloc: race condition: pthread_atfork() called before first
2221 malloc() results in unexpected locking behaviour/deadlocks
2222 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2224 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2225 [17565] localedata: pt_PT: wrong (work-)week start
2226 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2227 [17950] build: Build fails with -msse
2228 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2229 [18433] libc: posix_spawn does not return correctly upon failure to
2231 [18453] localedata: charmaps/IBM875: incorrect codes
2232 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2234 [18896] localedata: he_IL: improvements for currency
2235 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2236 Romanian locale data
2237 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2239 [19056] libc: Deprecate readdir_r
2240 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2242 [19198] localedata: nl_NL: small improvements for Dutch locales
2243 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2244 nameservers (CVE-2016-5417)
2245 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2247 [19400] locale: Language missing in "iso-639.def", trivial fix in
2249 [19431] malloc: Deadlock between fflush, getdelim, and fork
2250 [19505] libc: Incorrect file descriptor validity checks in
2251 posix_spawn_file_actions_add{open,close,dup2}
2252 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2253 when using RTLD_NEXT
2254 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2255 `intl/{gettextP,loadinfo}.h'
2256 [19534] libc: execle, execlp may use malloc
2257 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2258 [19573] network: res_nclose and __res_maybe_init disagree about name
2259 server initialization, breaking Hesiod
2260 [19575] localedata: Status of GB18030 tables
2261 [19581] localedata: sr_* date_fmt string contains additional newline
2262 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2264 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2265 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2266 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2267 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2269 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2271 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2273 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2274 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2275 [19633] locale: strfmon_l applies global locale to number formatting
2276 [19642] network: Memory leak in getnameinfo
2277 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2278 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2280 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2281 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2283 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2284 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2286 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2288 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2290 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2291 pointers and lengths in error-case.
2292 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2293 report errors on UTF-16 surrogates values.
2294 [19755] nscd: nscd assertion failure in gc
2295 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2296 [19759] libc: mempcpy shouldn't be inlined
2297 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2298 [19765] libc: s390 needs an optimized mempcpy
2299 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2300 NAME_MAX limit assumption (CVE-2016-1234)
2301 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2302 [19787] network: Missing and incorrect truncation checks in getnameinfo
2303 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2305 [19791] network: Assertion failure in res_query.c with un-connectable name
2307 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2308 [19822] math: libm.so install clobbers old version
2309 [19825] network: resolv: send_vc can return uninitialized data in second
2310 response to getaddrinfo
2311 [19830] network: nss_dns: should check RDATA length against buffer length
2312 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2313 confronted with A/AAAA records of invalid size
2314 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2315 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2316 [19853] stdio: Printing IBM long double in decimal with high precision is
2318 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2319 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2320 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2322 [19865] network: Assertion failure or memory leak in
2323 _nss_dns_getcanonname_r
2324 [19868] network: nss_dns: netent code does not skip over non-PTR records
2325 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2327 [19881] string: Improve x86-64 memset
2328 [19907] string: Incorrect memcpy tests
2329 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2331 [19925] libc: termios.h XCASE namespace
2332 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2333 [19929] libc: limits.h NL_NMAX namespace
2334 [19931] stdio: Memory leak in vfprintf
2335 [19957] libc: clone(CLONE_VM) access invalid parent memory
2336 [19963] localedata: en_IL: New locale
2337 [19989] stdio: stdio.h cuserid namespace
2338 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2340 [19996] locale: langinfo.h nl_langinfo_l namespace
2341 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2342 [20010] network: getaddrinfo: Stack overflow in hostent translation
2344 [20012] stdio: libio: fmemopen append mode failure
2345 [20014] stdio: stdio.h namespace for pre-threads POSIX
2346 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2347 [20023] libc: fcntl.h timespec namespace
2348 [20024] math: [x86_64] vectorized sincos trashes the stack
2349 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2350 [20041] time: sys/time.h timespec namespace
2351 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2352 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2353 [20051] libc: ttyslot in wrong header under wrong conditions
2354 [20054] libc: gethostname not declared for XPG4
2355 [20055] libc: termios.h missing tcgetsid for XPG4
2356 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2358 [20073] libc: sys/stat.h fchmod namespace
2359 [20074] libc: stdlib.h rand_r namespace
2360 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2361 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2363 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2364 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2366 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2367 [20119] libc: Wrong mask for processors level type from CPUID
2368 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2369 AS not supporting AVX512
2370 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2372 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2373 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2375 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2376 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2377 [20178] libc: posix_spawn{p} should not call exit
2378 [20191] stdio: libio: vtables hardening
2379 [20195] string: FMA4 detection requires CPUID execution with register
2381 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2382 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2384 [20212] math: acos (sNaN) returns sNaN
2385 [20213] math: asin (sNaN) returns sNaN
2386 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2387 [20218] math: [i386] asinhl (sNaN) returns sNaN
2388 [20219] math: [i386] atanhl (sNaN) returns sNaN
2389 [20222] stdio: fopencookie: Mangle function pointers
2390 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2391 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2392 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2394 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2395 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2396 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2397 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2398 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2399 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2400 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2401 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2402 [20240] math: modf (sNaN) returns sNaN
2403 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2404 [20250] math: frexp (sNaN) returns sNaN
2405 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2406 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2408 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2409 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2410 subscript is below array bounds [-Werror=array-bounds]
2411 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2412 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2414 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2415 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2417 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2418 "invalid" exceptions
2419 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2420 [20316] localedata: id_ID: Februari instead of Pebruari
2421 [20327] string: POWER8 strcasecmp returns incorrect result
2422 [20347] math: Failure: Test: j0_downward (0xap+0)
2423 [20348] libc: FAIL: misc/tst-preadvwritev64
2424 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2425 [20350] libc: There is no test for p{read,write}64
2426 [20357] math: Incorrect cos result for 1.5174239687223976
2427 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2431 * Unicode 8.0.0 Support: Character encoding, character type info, and
2432 transliteration tables are all updated to Unicode 8.0.0, using new
2433 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2434 These updates cause user visible changes, such as the fixes for bugs
2435 89, 16061, and 18568.
2437 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2438 kernel-internal CPU set size. This means that requests that change the
2439 CPU affinity which failed before (for example, an all-ones CPU mask) will
2440 now succeed. Applications that need to determine the effective CPU
2441 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2442 setting it because the kernel can adjust it (and the previous size check
2443 would not detect this in the majority of cases).
2445 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2446 the following new symbols are used: fts64_children, fts64_close,
2447 fts64_open, fts64_read and fts64_set.
2449 * getaddrinfo now detects certain invalid responses on an internal netlink
2450 socket. If such responses are received, an affected process will
2451 terminate with an error message of "Unexpected error <number> on netlink
2452 descriptor <number>" or "Unexpected netlink response of size <number> on
2453 descriptor <number>". The most likely cause for these errors is a
2454 multi-threaded application which erroneously closes and reuses the netlink
2455 file descriptor while it is used by getaddrinfo.
2457 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2458 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2459 unnecessary serialization of memory allocation requests across threads.
2460 The defect is now corrected. Users should see a substantial increase in
2461 the concurent throughput of allocation requests for applications which
2462 trigger this bug. Affected applications typically create and
2463 destroy threads frequently. (Bug 19048 was reported and analyzed by
2466 * There is now a --disable-timezone-tools configure option for disabling the
2467 building and installing of the timezone related utilities (zic, zdump, and
2468 tzselect). This is useful for people who build the timezone data and code
2469 independent of the GNU C Library.
2471 * The obsolete header <regexp.h> has been removed. Programs that require
2472 this header must be updated to use <regex.h> instead.
2474 * The obsolete functions bdflush, create_module, get_kernel_syms,
2475 query_module and uselib are no longer available to newly linked binaries;
2476 the header <sys/kdaemon.h> has been removed. These functions and header
2477 were specific to systems using the Linux kernel and could not usefully be
2478 used with the GNU C Library on systems with version 2.6 or later of the
2481 * Optimized string, wcsmbs and memory functions for IBM z13.
2482 Implemented by Stefan Liebler.
2484 * Newly linked programs that define a variable called signgam will no longer
2485 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2486 require signgam to be set by those functions must ensure that they use the
2487 variable provided by the GNU C Library and declared in <math.h>, without
2488 defining their own copy.
2490 * The minimum GCC version that can be used to build this version of the GNU
2491 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2492 still be used to compile programs using the GNU C Library.
2494 Security related changes:
2496 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2497 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2499 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2500 the pointer guard feature. It is always enabled. Previously,
2501 LD_POINTER_GUARD could be used to disable security hardening in binaries
2502 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2505 * An integer overflow in hcreate and hcreate_r could lead to an
2506 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2508 * The catopen function no longer has unbounded stack usage. Reported by
2509 Max. (CVE-2015-8779)
2511 * The nan, nanf and nanl functions no longer have unbounded stack usage
2512 depending on the length of the string passed as an argument to the
2513 functions. Reported by Joseph Myers. (CVE-2014-9761)
2515 * A stack-based buffer overflow was found in libresolv when invoked from
2516 libnss_dns, allowing specially crafted DNS responses to seize control
2517 of execution flow in the DNS client. The buffer overflow occurs in
2518 the functions send_dg (send datagram) and send_vc (send TCP) for the
2519 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2520 family. The use of AF_UNSPEC triggers the low-level resolver code to
2521 send out two parallel queries for A and AAAA. A mismanagement of the
2522 buffers used for those queries could result in the response of a query
2523 writing beyond the alloca allocated buffer created by
2524 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2525 the overflow. Thanks to the Google Security Team and Red Hat for
2526 reporting the security impact of this issue, and Robert Holiday of
2527 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2529 The following bugs are resolved with this release:
2531 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2532 [887] math: Math library function "logb" and "nextafter" inconsistent
2533 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2534 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2535 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2536 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2538 [4404] localedata: German translation of "Alarm clock" is misleading
2539 [6799] math: nextafter() and nexttoward() doen't set errno on
2540 overflow/underflow errors
2541 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2543 [10432] nis: _nss_nis_setnetgrent assertion failure
2544 [11460] libc: fts has no LFS support
2545 [12926] network: getaddrinfo()/make_request() may spin forever
2546 [13065] nptl: Race condition in pthread barriers
2547 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2548 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2550 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2551 [14912] libc: Rename non-installed bits/*.h headers
2552 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2553 [15367] math: Let gcc use __builtin_isinf
2554 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2555 [15421] math: lgamma wrongly sets signgam for ISO C
2556 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2557 FE_INVALID with argument out of range
2558 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2560 [15786] dynamic-link: ifunc resolver functions can smash function
2562 [15918] math: Unnecessary check for equality in hypotf()
2563 [16061] localedata: Review / update transliteration data
2564 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2566 [16141] time: strptime %z offset restriction
2567 [16171] math: drem should be alias of remainder
2568 [16296] math: fegetround is pure?
2569 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2570 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2572 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2573 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2575 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2576 "Exception "Inexact" set" on ppc32
2577 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2578 [16517] math: Missing underflow exception from tanf/tan/tanl
2579 [16519] math: Missing underflow exception from sinhf
2580 [16520] math: Missing underflow exception from tanhf
2581 [16521] math: Missing underflow exception from exp2
2582 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2584 [16734] stdio: fopen calls mmap to allocate its buffer
2585 [16961] math: nan function incorrect handling of bad sequences
2586 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2587 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2588 [16985] locale: localedef: confusing error message when opening output
2590 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2591 [17197] locale: Redundant shift character in iconv conversion output at
2593 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2594 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2595 [17250] dynamic-link: static linking breaks nss loading
2596 (getaddrinfo/getpwnam/etc...)
2597 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2599 [17441] math: isnan() should use __builtin_isnan() in GCC
2600 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2601 (related to lock elision)
2602 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2603 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2604 [17887] time: strptime should be able to parse "+01:00" style timezones
2605 [17905] libc: catopen() Multiple unbounded stack allocations
2607 [18084] libc: backtrace (..., 0) dumps core on x86
2608 [18086] libc: nice() sets errno to 0 on success
2609 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2610 is too large (CVE-2015-8778)
2611 [18251] dynamic-link: SONAME missing when audit modules provides path
2612 [18265] libc: add attributes for wchar string and memory functions
2613 [18370] math: csqrt missing underflows
2614 [18421] libc: [hppa] read-only segment has dynamic relocations
2615 [18472] libc: Obsolete syscall wrappers should be compat symbols
2616 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2617 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2618 [18525] localedata: Remove locale timezone information
2619 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2620 [18568] localedata: Update locale data to Unicode 8.0
2621 [18589] locale: sort-test.sh fails at random
2622 [18595] math: ctan, ctanh missing underflows
2623 [18604] libc: assert macro-expands its argument
2624 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2625 contains a vector instruction exception.
2626 [18611] math: j1, jn missing errno setting on underflow
2627 [18618] localedata: sync Chechen locale definitions with other *_RU
2629 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2630 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2631 [18665] network: In send_dg, the recvfrom function is NOT always using the
2632 buffer size of a newly created buffer (CVE-2015-7547)
2633 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2635 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2637 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2638 [18699] math: tilegx cproj() for various complex infinities does not yield
2640 [18724] libc: Harden put*ent functions against data injection
2641 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2642 [18755] build: build errors with -DNDEBUG
2643 [18757] stdio: fmemopen fails to set errno on failure
2644 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2646 [18781] libc: openat64 lacks O_LARGEFILE
2647 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2648 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2649 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2650 [18790] math: [ldbl-128ibm] tanhl inaccurate
2651 [18795] libc: stpncpy fortification misses buffer lengths that are
2652 statically too large
2653 [18796] build: build fails for --disable-mathvec
2654 [18803] math: hypot missing underflows
2655 [18820] stdio: fmemopen may leak memory on failure
2656 [18823] math: csqrt spurious underflows
2657 [18824] math: fma spurious underflows
2658 [18825] math: pow missing underflows
2659 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2660 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2661 [18870] build: sem_open.c fails to compile with missing symbol
2663 [18872] stdio: Fix memory leak in printf_positional
2664 [18873] libc: posix_fallocate overflow check ineffective
2665 [18875] math: Excess precision leads incorrect libm
2666 [18877] libc: arm: mmap offset regression
2667 [18887] libc: memory corruption when using getmntent on blank lines
2668 [18918] localedata: hu_HU: change time to HH:MM:SS format
2669 [18921] libc: Regression: extraneous stat() and fstat() performed by
2671 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2672 binaries (CVE-2015-8777)
2673 [18951] math: tgamma missing underflows
2674 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2676 [18953] localedata: lt_LT: change currency symbol to the euro
2677 [18956] math: powf inaccuracy
2678 [18961] math: [i386] exp missing underflows
2679 [18966] math: [i386] exp10 missing underflows
2680 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2681 [18969] build: multiple string test failures due to missing locale
2683 [18970] libc: Reference of pthread_setcancelstate in libc.a
2684 [18977] math: float / long double Bessel functions not in XSI POSIX
2685 [18980] math: i386 libm functions return with excess range and precision
2686 [18981] math: i386 scalb*, ldexp return with excess range and precision
2687 [18982] stdio: va_list and vprintf
2688 [18985] time: Passing out of range data to strftime() causes a segfault
2690 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2691 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2692 [19012] locale: iconv_open leaks memory on error path
2693 [19016] math: clog, clog10 inaccuracy
2694 [19018] nptl: Mangle function pointers in tls_dtor_list
2695 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2696 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2697 [19048] malloc: malloc: arena free list can become cyclic, increasing
2699 [19049] math: [powerpc] erfc incorrect zero sign
2700 [19050] math: [powerpc] log* incorrect zero sign
2701 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2702 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2703 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2704 [19074] network: Data race in _res_hconf_reorder_addrs
2705 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2706 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2707 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2709 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2711 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2712 [19086] manual: posix_fallocate64 documented argument order is wrong.
2713 [19088] math: lround, llround missing exceptions close to overflow
2715 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2716 [19095] math: dbl-64 lrint incorrect for 64-bit long
2717 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2718 [19124] dynamic-link: ld.so failed to build with older assmebler
2719 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2720 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2721 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2722 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2723 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2724 pthread_setaffinity_np
2725 [19156] math: [ldbl-128] j0l spurious underflows
2726 [19164] nptl: tst-getcpu fails with many possible CPUs
2727 [19168] math: math/test-ildoubl and math/test-ldouble failure
2728 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2729 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2731 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2732 (FE_NOMASK_ENV) do not clear SSE exceptions
2733 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2734 _int_new_arena/reused_arena
2735 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2736 [19201] math: dbl-64 remainder incorrect sign of zero result
2737 [19205] math: bits/math-finite.h conditions do not match math.h and
2739 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2740 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2741 for C99-based standards
2742 [19212] libc: features.h not -Wundef clean
2743 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2745 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2746 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2747 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2749 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2750 "inexact" exceptions
2751 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2753 [19242] libc: strtol incorrect in Turkish locales
2754 [19243] malloc: reused_arena can pick an arena on the free list, leading
2755 to an assertion failure and reference count corruption
2756 [19253] time: tzset() ineffective when temporary TZ did not include DST
2758 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2759 [19270] math: [hppa] Shared libm missing __isnanl
2760 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2761 MAP_HUGETLB and MAP_STACK defines
2762 [19313] nptl: Wrong __cpu_mask for x32
2763 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2764 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2765 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2766 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2767 [19363] time: x32: times() return value wrongly truncates/sign extends
2769 [19367] dynamic-link: Improve branch prediction on Silvermont
2770 [19369] network: Default domain name not reset by res_ninit when "search"
2771 / "domain" entry is removed from resolv.conf
2772 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2774 [19385] localedata: bg_BG: time separator should be colon, not comma
2775 [19408] libc: linux personality syscall wrapper may erroneously return an
2776 error on 32-bit architectures
2777 [19415] libc: dladdr returns wrong names on hppa
2778 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2779 IBM905, IBM907, and IBM909
2780 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2781 [19443] build: build failures with -DDEBUG
2782 [19451] build: Make check fails on test-double-vlen2
2783 [19462] libc: Glibc failed to build with -Os
2784 [19465] math: Wrong code with -Os
2785 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2787 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2789 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2790 [19486] math: S390: Math tests fail with "Exception Inexact set".
2791 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2792 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2794 [19590] math: Fail to build shared objects that use libmvec.so functions.
2798 * The following bugs are resolved with this release:
2800 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2801 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2802 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2803 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2804 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2805 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2806 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2807 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2808 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2809 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2810 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2811 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2812 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2813 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2814 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2815 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2816 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2817 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2818 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2819 18657, 18676, 18694, 18696, 18887.
2821 * Cache information can be queried via sysconf() function on s390 e.g. with
2822 _SC_LEVEL1_ICACHE_SIZE as argument.
2824 * A buffer overflow in gethostbyname_r and related functions performing DNS
2825 requests has been fixed. If the NSS functions were called with a
2826 misaligned buffer, the buffer length change due to pointer alignment was
2827 not taken into account. This could result in application crashes or,
2828 potentially arbitrary code execution, using crafted, but syntactically
2829 valid DNS responses. (CVE-2015-1781)
2831 * The time zone file parser has been made more robust against crafted time
2832 zone files, avoiding heap buffer overflows related to the processing of
2833 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2834 large time zone data files. Overly long time zone specifiers in the TZ
2835 variable no longer result in stack overflows and crashes.
2837 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2838 for LD and GD on x86 and x86-64, has been implemented. You will need
2839 binutils-2.24 or later to enable this optimization.
2841 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2842 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2843 Hat). These updates cause user visible changes, such as the fix for bug
2846 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2847 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2848 condition in some applications.
2850 * Added vector math library named libmvec with the following vectorized x86_64
2851 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2853 The library can be disabled with --disable-mathvec. Use of the functions is
2854 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2855 Shared library libmvec.so is linked in as needed when using -lm (no need to
2856 specify -lmvec explicitly for not static builds).
2857 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2859 * A new fmemopen implementation has been added with the goal of POSIX
2860 compliance. The new implementation fixes the following long-standing
2861 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2862 old implementation is still present for use be by existing binaries.
2864 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2865 releases. It has been fixed to match 2.19 and older, but binaries built
2866 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2868 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2869 Contributed by Roland McGrath (Google).
2871 * The header <regexp.h> is deprecated, and will be removed in a future
2872 release. Use of this header will trigger a deprecation warning.
2873 Application developers should update their code to use <regex.h> instead.
2875 This header was formerly part of SUS, but was deprecated in 1994 and
2876 removed from the standard in 2001. Also, the glibc implementation
2877 leaks memory. See BZ#18681 for more details.
2881 * The following bugs are resolved with this release:
2883 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2884 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2885 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2886 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2887 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2888 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2889 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2890 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2891 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2892 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2895 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2896 too little memory for the to-be-scanned arguments and overflow the
2897 allocated buffer. The implementation now correctly computes the required
2898 buffer size when using malloc, and switches to malloc from alloca as
2901 * A new semaphore algorithm has been implemented in generic C code for all
2902 machines. Previous custom assembly implementations of semaphore were
2903 difficult to reason about or ensure that they were safe. The new version
2904 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2905 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2906 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2908 * Port to Altera Nios II has been contributed by Mentor Graphics.
2910 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2911 implementations for powerpc64/powerpc64le.
2912 Implemented by Adhemerval Zanella (IBM).
2914 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2915 and powerpc64le. This may improve lock scaling of existing programs on
2916 HTM capable systems. The lock elision code is only enabled with
2917 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2918 powerpc will issue a transaction abort on every syscall to avoid side
2919 effects being visible outside transactions.
2921 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2922 AArch64. Contributed by ARM Ltd.
2924 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2926 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2927 under certain input conditions resulting in the execution of a shell for
2928 command substitution when the application did not request it. The
2929 implementation now checks WRDE_NOCMD immediately before executing the
2930 shell and returns the error WRDE_CMDSUB as expected.
2932 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2933 processing format strings with a large number of format specifiers.
2935 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2936 infinite loop if the DNS response contained a PTR record of an unexpected
2939 * The minimum GCC version that can be used to build this version of the GNU
2940 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2941 still be used to compile programs using the GNU C Library.
2943 * The GNU C Library is now built with -Werror by default. This can be
2944 disabled by configuring with --disable-werror.
2946 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2948 * The obsolete sigvec function has been removed. This was the original
2949 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2950 programs have been using instead for about 25 years. Of course, ABI
2951 compatibility for old binaries using sigvec remains intact.
2953 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2954 with newer versions of bison.
2956 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2957 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2958 registers overlay two consecutive single-precision registers. MIPS32R2
2959 introduced a new FPU mode (FR=1) where double-precision registers extend the
2960 corresponding single-precision registers which is incompatible with the
2961 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2962 require the use of FR=1 making a transition necessary. New o32 ABI
2963 extensions enable users to migrate over time from the original o32 ABI
2964 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2965 tracks the ABI of any loaded object and verifies that new objects are
2966 compatible. Mode transitions will also be requested as required and
2967 unsupportable objects will be rejected. The ABI checks include both soft and
2968 hard float ABIs for o32, n32 and n64.
2970 GCC 5 with GNU binutils 2.25 onwards:
2971 It is strongly recommended that all o32 system libraries are built using the
2972 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2973 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2974 compiler using --with-fp-32=xx to set this by default.
2978 * The following bugs are resolved with this release:
2980 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2981 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2982 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2983 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2984 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2985 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2986 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2987 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2988 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2989 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2990 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2991 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2992 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2993 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2994 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2996 * Reverted change of ABI data structures for s390 and s390x:
2997 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2998 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2999 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3000 are preserved pointing straight to the same implementation as the old ones.
3001 Given that, new callers will simply provide a too-big buffer to these
3002 functions. Any applications/libraries out there that embed jmp_buf or
3003 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3004 against 2.19 headers will have to rebuilt again. This is necessary in any
3005 case to revert the breakage in their ABI caused by the glibc change.
3007 * Support for file description locks is added to systems running the
3008 Linux kernel. The standard file locking interfaces are extended to
3009 operate on file descriptions, not file descriptors, via the use of
3010 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3011 are associated with an open file instead of a process.
3013 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3015 * The minimum Linux kernel version that this version of the GNU C Library
3016 can be used with is 2.6.32.
3018 * Running the testsuite no longer terminates as soon as a test fails.
3019 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3020 with PASS or FAIL lines for individual tests. A summary of the results is
3021 printed, including a list of failing lists, and "make check" exits with
3022 error status if there were any unexpected failures. "make check
3023 stop-on-test-failure=y" may be used to keep the old behavior.
3025 * The am33 port, which had not worked for several years, has been removed
3028 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3029 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3030 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3031 conflicted with POSIX (support for which was removed in 2.19), the
3032 interfaces those macros enabled remain available when compiling with
3033 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3034 test macros defined.
3036 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3038 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3039 This may improve lock scaling of existing programs on TX capable systems.
3040 The lock elision code is only built with --enable-lock-elision=yes and
3041 then requires a GCC version supporting the TX builtins. With lock elision
3042 default mutexes are elided via __builtin_tbegin, if the cpu supports
3043 transactions. By default lock elision is not enabled and the elision code
3046 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3047 copy the path argument. This allowed programs to cause posix_spawn to
3048 deference a dangling pointer, or use an unexpected pathname argument if
3049 the string was modified after the posix_spawn_file_actions_addopen
3052 * All supported architectures now use the main glibc sysdeps directory
3053 instead of some being in a separate "ports" directory (which was
3054 distributed separately before glibc 2.17).
3056 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3057 On configurations that support it (all Linux configurations), it's now
3058 used regardless of the --enable-add-ons switch to configure. It is no
3059 longer possible to build such configurations without pthreads support.
3061 * Locale names, including those obtained from environment variables (LANG
3062 and the LC_* variables), are more tightly checked for proper syntax.
3063 setlocale will now fail (with EINVAL) for locale names that are overly
3064 long, contain slashes without starting with a slash, or contain ".." path
3065 components. (CVE-2014-0475) Previously, some valid locale names were
3066 silently replaced with the "C" locale when running in AT_SECURE mode
3067 (e.g., in a SUID program). This is no longer necessary because of the
3070 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3071 with application code using Intel MPX instructions. (With all previous
3072 versions, the MPX register state could be clobbered when making calls
3073 into or out of a shared library.) Note that while the new dynamic
3074 linker is compatible with all known x86 hardware whether or not it
3075 supports Intel MPX, some x86 instruction-set emulators might fail to
3076 handle the new instruction encodings. This is known to affect Valgrind
3077 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3078 release), and might affect other tools that do instruction emulation.
3080 * Support for loadable gconv transliteration modules has been removed.
3081 The support for transliteration modules has been non-functional for
3082 over a decade, and the removal is prompted by security defects. The
3083 normal gconv conversion modules are still supported. Transliteration
3084 with //TRANSLIT is still possible, and the //IGNORE specifier
3085 continues to be supported. (CVE-2014-5119)
3087 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3088 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3089 resulting a denial-of-service security vulnerability in applications which
3090 use functions related to iconv. (CVE-2014-6040)
3094 * The following bugs are resolved with this release:
3096 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3097 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3098 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3099 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3100 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3101 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3102 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3103 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3104 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3105 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3106 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3107 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3108 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3109 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3110 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3111 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3112 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3113 16431, 16453, 16474, 16506, 16510, 16529
3115 * Slovenian translations for glibc messages have been contributed by the
3116 Translation Project's Slovenian team of translators.
3118 * The public headers no longer use __unused nor __block. This change is to
3119 support compiling programs that are derived from BSD sources and use
3120 __unused internally, and to support compiling with Clang's -fblock
3121 extension which uses __block.
3123 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3124 large collation sequences to optimize multiple passes. This cache
3125 computation may overflow for large collation sequences and may cause a
3126 stack or buffer overflow. This is now fixed to use a slower algorithm
3127 which does not use a cache if there is an integer overflow.
3129 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3130 rules for large collation sequences to optimize multiple passes and falls
3131 back to alloca if malloc fails, resulting in a possible stack overflow.
3132 The implementation now falls back to an uncached collation sequence lookup
3135 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3136 initialized for static applications resulting in the security feature
3137 being disabled. The pointer guard is now correctly initialized to a
3138 random value for static applications. Existing static applications need
3139 to be recompiled to take advantage of the fix (bug 15754).
3141 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3142 to the d_name member of struct dirent, or omit the terminating NUL
3143 character. (Bugzilla #14699).
3145 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3146 aligned_alloc functions could allocate too few bytes or corrupt the
3147 heap when passed very large allocation size values (Bugzilla #15855,
3150 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3151 for AF_INET6 has been fixed (Bugzilla #16072).
3153 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3154 pap_CW, quz_PE, the_NP.
3156 * Substantially revised locales: gd_GB, ht_HT
3158 * The LC_ADDRESS field was updated to support country_car for almost all
3161 * ISO 1427 definitions were updated.
3163 * ISO 3166 definitions were updated.
3165 * The localedef utility now supports --big-endian and --little-endian
3166 command-line options to generate locales for a different system from that
3167 for which the C library was built.
3169 * Binary locale files now only depend on the endianness of the system for
3170 which they are generated and not on other properties of that system. As a
3171 consequence, binary files generated with new localedef may be incompatible
3172 with old versions of the GNU C Library, and binary files generated with
3173 old localedef may be incompatible with this version of the GNU C Library,
3174 in the following circumstances:
3176 + Locale files may be incompatible on m68k systems.
3178 + Locale archive files (but not separate files for individual locales) may
3179 be incompatible on systems where plain "char" is signed.
3181 * The configure option --disable-versioning has been removed. Builds with
3182 --disable-versioning had not worked for several years.
3184 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3185 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3187 * SystemTap probes for malloc have been introduced.
3189 * SystemTap probes for slow multiple precision fallback paths of
3190 transcendental functions have been introduced.
3192 * Support for powerpc64le has been added.
3194 * The soft-float powerpc port now supports e500 processors.
3196 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3198 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3199 set of header declarations that are enabled by default, even when other
3200 feature test macros or compiler options such as -std=c99 would otherwise
3201 disable some of those declarations.
3203 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3204 conflict with POSIX. The libbsd-compat library (which was a dummy library
3205 that did nothing) has also been removed.
3207 * Preliminary documentation about Multi-Thread, Async-Signal and
3208 Async-Cancel Safety has been added.
3210 * Change of ABI data structures for s390 and s390x:
3211 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3212 allow for future hardware extensions. All library functions that accept or
3213 return these structures were versioned in order to provide backwards
3214 compatibility with existing code. However, not all cases can be handled
3215 with interface versioning. If an application embeds either structure into
3216 another structure and that structure is passed to another compilation unit
3217 which expects the newer larger-sized object then any access to the new
3218 fields will result in undefined behaviour. Similarly any access to fields
3219 that were moved by the enlarging of the structures will cause undefined
3220 behaviour. To fix the undefined behaviour all objects that are part of the
3221 final in-memory image must agree on the size of structures, and this may
3222 require recompilation.
3226 * The following bugs are resolved with this release:
3228 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3229 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3230 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3231 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3232 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3233 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3234 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3235 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3236 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3237 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3238 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3239 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3240 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3243 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3244 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3245 Distributions can re-enable building and using pt_chown via the new configure
3246 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3247 considerable security risks and should only be used if the distribution
3248 understands and accepts the risks.
3250 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3253 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3254 fixed (Bugzilla #15330).
3256 * Add support for calling C++11 thread_local object destructors on thread
3257 and program exit. This needs compiler support for offloading C++11
3258 destructor calls to glibc.
3260 * Improved worst case performance of libm functions with double inputs and
3263 * Support for priority inherited mutexes in pthread condition variables on
3264 non-x86 architectures.
3266 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3268 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3270 * Optimized string functions for ARM. Implemented by Will Newton and
3273 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3275 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3278 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3279 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3281 * Added a benchmark framework to track performance of functions in glibc.
3283 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3284 It is based on draft TS 18661 and currently enabled as a GNU extension.
3286 * On Linux, the clock function now uses the clock_gettime system call
3287 for improved precision, rather than old times system call.
3289 * Added support for version-3 tz format files. This is needed when using
3290 the tz database release 2013e or later, and affects a few unusual cases --
3291 currently only TZ='America/Godthab' for time stamps after 2037.
3293 * Added new API functions pthread_getattr_default_np and
3294 pthread_setattr_default_np to get and set the default pthread
3295 attributes of a process.
3297 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3298 This may improve lock scaling of existing programs on TSX capable systems.
3299 When the --enable-lock-elision=yes parameter is specified at configure
3300 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3303 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3304 availability). Implemented by Ryan S. Arnold.
3306 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3310 * The following bugs are resolved with this release:
3312 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3313 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3314 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3315 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3316 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3317 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3318 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3319 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3320 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3321 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3322 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3323 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3324 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3325 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3326 14879, 14889, 14893, 14898, 14914.
3328 * Optimization of memcpy for MIPS.
3330 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3331 EMFILE has been fixed (Bugzilla #14889).
3333 * The add-on ports collection is now distributed in the "ports" subdirectory
3334 of the main GNU C Library distribution, rather than separately.
3336 * Port to ARM AArch64 contributed by Linaro.
3338 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3339 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3341 Implemented by Andreas Krebbel.
3343 * The new function secure_getenv allows secure access to the environment,
3344 returning NULL if running in a SUID/SGID process. This function replaces
3345 the internal function __secure_getenv.
3347 * SystemTap static probes have been added into the dynamic linker.
3348 Implemented by Gary Benson.
3350 * Optimizations of string functions strstr, strcasestr and memmem.
3351 Implemented by Maxim Kuvyrkov.
3353 * The minimum Linux kernel version that this version of the GNU C Library
3354 can be used with is 2.6.16.
3356 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3357 powerpc POWER7. Implemented by Will Schmidt.
3359 * New configure option --disable-nscd builds the C library such that it
3360 never attempts to contact the Name Service Caching Daemon (nscd).
3361 New configure option --disable-build-nscd avoids building nscd itself;
3362 this is the default if --disable-nscd is used.
3364 * Improved support for cross-compilation, including cross-testing and
3365 bootstrap builds without a previously built glibc.
3367 * Several testsuite tests are now able to test multiple IFUNC variants of an
3368 interface, rather than just testing the one that would be chooen by
3371 * New configure options --with-bugurl and --with-pkgversion, for
3372 distributors to use to embed their bug-reporting and package version
3373 information in --help and --version output.
3375 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3376 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3377 allows creation of chroots without the procfs mounted on /proc.
3379 * The `crypt' function now fails if passed salt bytes that violate the
3380 specification for those values. On Linux, the `crypt' function will
3381 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3382 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3383 when the mode is enabled.
3385 * The `clock_*' suite of functions (declared in <time.h>) is now available
3386 directly in the main C library. Previously it was necessary to link with
3387 -lrt to use these functions. This change has the effect that a
3388 single-threaded program that uses a function such as `clock_gettime' (and
3389 is not linked with -lrt) will no longer implicitly load the pthreads
3390 library at runtime and so will not suffer the overheads associated with
3391 multi-thread support in other code such as the C++ runtime library.
3393 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3398 * The following bugs are resolved with this release:
3400 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3401 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3402 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3403 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3404 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3405 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3406 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3407 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3408 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3409 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3410 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3411 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3412 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3413 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3414 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3415 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3416 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3417 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3418 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3419 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3420 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3421 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3424 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3425 configuring glibc with:
3426 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3427 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3428 Implemented by H.J. Lu.
3432 + define static_assert
3434 + do not declare gets
3436 + declare at_quick_exit and quick_exit also for ISO C11
3438 + aligned_alloc. NB: The code is deliberately allows the size parameter
3439 to not be a multiple of the alignment. This is a moronic requirement
3440 in the standard but it is only a requirement on the caller, not the
3443 + timespec_get added
3445 + uchar.h support added
3447 + CMPLX, CMPLXF, CMPLXL added
3449 Implemented by Ulrich Drepper.
3451 * Support for the IA-64 has been moved to ports.
3453 * Remove support for anything but ELF binary format
3455 * Checking versions of poll, ppoll added.
3456 Implemented by Ulrich Drepper.
3458 * More generic and 64-bit performance optimizations to math functions.
3459 Implemented by Ulrich Drepper.
3461 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3462 headers and functions available at compile time as they were before
3463 version 2.14. This option will be removed at some time in the future
3464 after the TI-RPC library becomes fully sufficient for the needs of
3465 existing applications.
3467 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3468 Note that glibc is not expected to work with any Linux kernel version
3471 * New header <sys/auxv.h> and function getauxval allowing easy access to
3472 the AT_* key-value pairs passed from the Linux kernel. The header also
3473 defines the HWCAP_* bits associated with the AT_HWCAP key.
3475 * New locales: mag_IN
3477 * New configure option --enable-systemtap builds SystemTap static probes
3478 into libc for setjmp and longjmp and into libpthread for various operations.
3479 So far the setjmp/longjmp probes and some of the libpthread probes are
3480 provided only for i*86 and x86_64.
3481 Implemented by Roland McGrath and Rayson Ho.
3483 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3485 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3488 * More optimized functions for SPARC. Implemented by David S. Miller.
3490 * Improved support for cross-compilation, especially bootstrap builds
3491 without a previously built glibc.
3493 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3494 Chris Metcalf from Tilera.
3496 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3497 now supported for ARM processors.
3499 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3500 as the name of the dynamic linker, to distinguish it from the
3501 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3503 * Support for CRIS has been removed from ports.
3505 * A new class of installed header has been documented for low-level
3506 platform-specific functionality. PowerPC added the first instance with a
3507 function to provide time base register access. Contributed by Tulio
3508 Magno Quites Machado Filho.
3510 * ix86 configurations now install header files that are consistent with
3511 what x86-64 configurations install. These same header files can be used
3512 for -m32, -m64, or -mx32 builds.
3513 Contributed by H.J. Lu.
3515 * Math library bug fixes. A thorough audit of all open math library bugs was
3516 conducted by Joseph Myers. Significant progress was made on many math
3517 library bugs resulting in more accurate exceptions and function results.
3518 Many thanks to all those that contributed including Andreas Jaeger for his
3519 patch review and work on the x87 trigonometric instruction issues.
3521 * Timezone data is no longer installed. Timezone-related binaries and scripts
3522 will continue to be installed. Users should obtain their timezone data from
3523 their distribution provider or from the tzdata package at
3524 <ftp://munnari.oz.au/pub/>.
3528 * The following bugs are resolved with this release:
3530 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3531 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3532 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3533 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3534 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3535 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3536 13484, 13506, 13515, 13523, 13524, 13538, 13540
3538 * New program pldd to list loaded object of a process
3539 Implemented by Ulrich Drepper.
3541 * Add nss_db support back to glibc. No more dependency on Berkeley db
3542 and support for initgroups lookups.
3543 Implemented by Ulrich Drepper.
3545 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3546 Contributed by HJ Lu.
3548 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3549 Contributed by HJ Lu.
3551 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3552 on x86-32 and x86-64.
3553 Contributed by Liubov Dmitrieva.
3555 * Optimized strchr and strrchr for SSE on x86-32.
3556 Contributed by Liubov Dmitrieva.
3558 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3559 for x86-64 and x86-32.
3560 Contributed by Liubov Dmitrieva.
3562 * New interfaces: scandirat, scandirat64
3563 Implemented by Ulrich Drepper.
3565 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3566 Implemented by Ulrich Drepper.
3568 * nscd now also caches the netgroup database.
3569 Implemented by Ulrich Drepper.
3571 * Integrate libm with gcc's -ffinite-math-only option.
3572 Implemented by Ulrich Drepper.
3574 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3575 to math functions. Implemented by Ulrich Drepper.
3577 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3578 Implemented by Ulrich Drepper.
3580 * New Linux interfaces: process_vm_readv, process_vm_writev
3582 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3583 Implemented by Ulrich Drepper.
3585 * Optimized nearbyint and strcasecmp for PPC.
3586 Implemented by Adhemerval Zanella.
3588 * New locales: bho_IN, unm_US, es_CU, ta_LK
3592 * The following bugs are resolved with this release:
3594 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3595 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3596 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3597 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3598 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3599 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3600 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3601 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3602 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3603 12795, 12811, 12813, 12814, 12841
3605 * The RPC implementation in libc is obsoleted. Old programs keep working
3606 but new programs cannot be linked with the routines in libc anymore.
3607 Programs in need of RPC functionality must be linked against TI-RPC.
3608 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3610 Visible changes of this change include (obviously) the inability to link
3611 programs using RPC functions without referencing the TI-RPC library and the
3612 removal of the RPC headers from the glibc headers.
3613 Implemented by Ulrich Drepper.
3615 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3616 syncfs, setns, sendmmsg
3618 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3619 yue_HK, lij_IT, mhr_RU
3621 * New encodings: CP770, CP771, CP772, CP773, CP774
3623 * New program sotruss to trace calls through PLTs
3624 Implemented by Ulrich Drepper.
3626 * The malloc hook implementation is marked deprecated and will be removed
3627 from the default implementation in the next version. The design never
3628 worked ever since the introduction of threads. Even programs which do
3629 not create threads themselves can use multiple threads created internally.
3633 * The following bugs are resolved with this release:
3635 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3636 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3637 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3638 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3641 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3643 * POWER7 optimizations: memset, memcmp, strncmp
3645 * New optimized string functions for x86-64: strnlen (SSE2),
3646 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3647 Implemented by Ulrich Drepper.
3651 * The following bugs are resolved with this release:
3653 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3654 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3655 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3656 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3657 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3658 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3659 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3660 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3662 * New interfaces: pthread_getname_np, pthread_setname_np
3664 * New Linux interface: recvmmsg
3666 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3668 * The dynamic linker now recognizes supported ABI versions from the
3669 EI_ABIVERSION field in the ELF header.
3670 Implemented by Ulrich Drepper.
3672 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3673 will not be used to fill in password fields in the passwd.byname replies.
3674 Instead it is used to synthesize the shadow.byname table, should it be
3675 missing. This is a useful mode in some installations involving Solaris.
3676 Implemented by Ulrich Drepper.
3678 * New locales: kok_IN, sq_MK, cv_RU
3682 * The following bugs are resolved with this release:
3684 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3685 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3686 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3687 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3688 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3689 10789, 10817, 10823, 10840, 10847
3691 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3693 Implemented by Ulrich Drepper.
3695 * Checking version of longjmp added that fails if an uninitialized stack
3696 frame would be created. Implemented by Ulrich Drepper.
3698 * STT_GNU_IFUNC is now supported in static executables.
3699 Implemented by H.J. Lu.
3701 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3703 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3704 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3705 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3706 Contributed by H.J. Lu.
3708 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3709 Implemented by Ulrich Drepper.
3711 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3713 Contributed by H.J. Lu.
3715 * Support for fma instruction in AVX on x86-64.
3716 Implemented by H.J. Lu and Ulrich Drepper.
3718 * AVX support in x86-64 auditing support in ld.so.
3719 Implemented by H.J. Lu.
3721 * STB_GNU_UNIQUE support added.
3722 Implemented by Ulrich Drepper.
3724 * Implement second fallback mode for optimized DNS lookup for even more
3725 broken environments. If two requests from the same port are not
3726 handled correctly close the socket and open a new one before sending
3727 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3728 can be used to select this mode right away, instead of rediscovering the
3729 necessity is every process again.
3730 Implemented by Ulrich Drepper.
3732 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3733 Implemented by Adam Tkac.
3735 * Optimized iconv conversions for S390x.
3736 Implemented by Andreas Krebbel.
3738 * Using condvars with PI mutexes is now more efficient due to kernel
3739 support for requeueing to PI futexes. NPTL support added for x86-64.
3740 Implemented by Ulrich Drepper.
3742 * New locales: ps_AF, my_MM
3746 * The following bugs are resolved with this release:
3748 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3749 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3750 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3751 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3752 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3754 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3755 Implemented by Ulrich Drepper.
3757 * New Linux interfaces: accept4, fallocate, fallocate64.
3758 Implemented by Ulrich Drepper.
3760 * Correct declarations of string function when used in C++ code. This
3761 could lead to compile errors for invalid C++ code.
3763 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3766 * New POSIX 2008 interface: psiginfo
3767 Implemented by Ulrich Drepper.
3769 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3770 Implemented by Ulrich Drepper.
3772 * Support for selecting between multiple function definitions at runtime
3773 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3775 * The libcrypt library can now use the hash function implementations in
3776 NSS. Implemented by Ulrich Drepper.
3778 * The malloc implementation can be compiled to be less memory efficient
3779 but higher performing in multi-threaded programs.
3780 Implemented by Ulrich Drepper.
3782 * New locales: nan_TW@latin, ks_IN
3784 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3785 Implemented by Ulrich Drepper.
3787 * Extended printf hook support. It is possible to use user-defined types
3788 and extend existing format specifiers.
3789 Implemented by Ulrich Drepper.
3791 * Handling for group shadow files has been added.
3792 Implemented by Ulrich Drepper.
3794 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3795 servers (the case, e.g., for some people using the built-in DNS
3796 server in ADSL modems/routers). There is a once-per-process timeout
3797 in case of a broken server. To avoid it, users can run nscd or put
3798 'options single-request' in /etc/resolv.conf.
3799 Implemented by Ulrich Drepper.
3803 * The following bugs are resolved with this release:
3805 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3806 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3807 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3808 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3809 6968, 6974, 6980, 6995, 7008, 7009, 7029
3811 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3812 up at the same time. Implemented by Ulrich Drepper.
3814 * TLS descriptors for LD and GD on x86 and x86-64.
3815 Implemented by Alexandre Oliva.
3817 * getaddrinfo now handles DCCP and UDPlite.
3818 Implemented by Ulrich Drepper.
3820 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3821 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3822 Implemented by Ulrich Drepper.
3824 * New implementation of memmem, strstr, and strcasestr which is O(n).
3825 Implemented by Eric Blake.
3827 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3829 * Implement "e" option for popen to open file descriptor with the
3830 close-on-exec flag set. Implemented by Ulrich Drepper.
3832 * Implement "b" mode for fmemopen. In this mode writes writes don't
3833 implicitly add a NUL byte and seeks from the end of the buffer really
3834 use the buffer end, not the string length as the basis.
3835 Implemented by Ulrich Drepper.
3837 * Many functions, exported and internal, now atomically set the close-on-exec
3838 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3840 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3842 Implemented by Pravin Satpute.
3844 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3848 * The following bugs are resolved with this release:
3850 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3851 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3852 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3853 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3854 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3855 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3856 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3858 * New locales: bo_CN, bo_IN, shs_CA.
3860 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3862 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3863 Implemented by Pravin Satpute.
3865 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3867 * nscd caches now all timeouts for DNS entries
3868 Implemented by Ulrich Drepper.
3870 * nscd is more efficient and wakes up less often.
3871 Implemented by Ulrich Drepper.
3873 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3874 vdprintf, and obstack_vprintf.
3875 Implemented by Jakub Jelinek.
3877 * Faster memset for x86-64.
3878 Implemented by Harsha Jagasia and H.J. Lu.
3880 * Faster memcpy on x86.
3881 Implemented by Ulrich Drepper.
3883 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3884 Implemented by Ulrich Drepper.
3886 * Faster sqrt and sqrtf implemention for some PPC variants.
3887 Implemented by Steven Munroe.
3891 * The following bugs are resolved with this release:
3893 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3894 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3895 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3896 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3897 5071, 5103, 5104, 5112, 5113, 5184, 5186
3899 * More checking functions: fread, fread_unlocked, open*, mq_open.
3900 Implemented by Jakub Jelinek and Ulrich Drepper.
3902 * Extend fortification to C++. Implemented by Jakub Jelinek.
3904 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3905 by not recognizing 'a' as a modifier when those specs are requested.
3906 Implemented by Jakub Jelinek.
3908 * PPC optimizations to math and string functions.
3909 Implemented by Steven Munroe.
3911 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3912 options to be passed. Implemented by Ulrich Drepper.
3914 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3916 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3917 Implemented by Ulrich Drepper.
3919 * Handle private futexes in the NPTL implementation.
3920 Implemented by Jakub Jelinek and Ulrich Drepper.
3922 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3923 Implemented by Roland McGrath and Ulrich Drepper.
3925 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3927 * SHA-256 and SHA-512 based password encryption.
3928 Implemented by Ulrich Drepper.
3930 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3931 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3934 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3935 Implemented by Ulrich Drepper.
3939 * The following bugs are resolved with this release:
3941 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3942 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3943 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3944 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3945 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3946 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3947 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3950 * New Linux interfaces: epoll_pwait, sched_getcpu.
3952 * New generic interfaces: strerror_l.
3954 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3958 * The following bugs are resolved with this release:
3960 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3961 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3962 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3963 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3964 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3965 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3966 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3967 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3968 3225, 3251, 3252, 3253, 3273
3970 * For Linux, the sorting of addresses returned by getaddrinfo now also
3971 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3972 Implemented by Ulrich Drepper.
3974 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3975 Implemented by Ulrich Drepper.
3977 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3979 * New iconv module for MIK. Contributed by Alexander Shopov.
3981 * For sites with broken group and/or passwd database, the auto-propagate
3982 option of nscd can prevent creating ID lookup entries from the results
3983 of a name lookup and vice versa. This usually is no problem but some
3984 site might have problems with the default behavior.
3985 Implemented by Ulrich Drepper.
3987 * Iterating over entire database in NIS can be slow. With the
3988 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3989 to trade time for memory. The entire database will be read at once.
3990 Implemented by Ulrich Drepper.
3992 * The interfaces introduced in RFC 3542 have been implemented by
3995 * Support for the new ELF hash table format was added by Ulrich Drepper.
3997 * Support for priority inheritance mutexes added by Jakub Jelinek and
4000 * Support for priority protected mutexes added by Jakub Jelinek.
4002 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4003 or_IN, csb_PL, fy_NL, sr_ME.
4007 * More overflow detection functions.
4009 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4010 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4012 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4013 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4014 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4015 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4016 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4017 by Masahide Washizawa.
4019 * It is now possible to install audit libraries for the dynamic linker using
4020 LD_AUDIT. Implemented by Ulrich Drepper.
4022 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4023 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4024 For a libc and libpthread that works well on Linux 2.4 kernels, we
4025 recommend using the stable 2.3 branch.
4027 * The new function open_wmemstream acts like open_memstream,
4028 but uses a wchar_t wide character buffer.
4030 * The new function ppoll is an improved version of poll, similar to pselect.
4032 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4033 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4034 renameat, unlinkat, linkat, symlinkat, readlinkat.
4036 * New Linux kernel system calls: unshare,
4037 inotify_init, inotify_add_watch, inotify_rm_watch.
4039 * The euidaccess function is now also known by the alias eaccess,
4040 for compatibility with some other systems.
4042 * Timezone data updated to 2006b version.
4046 * The following bugs are resolved with this release:
4048 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4049 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4050 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4051 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4052 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4053 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4055 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4057 * As of this release, GCC 4 can be used to compile the C Library.
4059 * Timezone data updated to 2005m version.
4063 * The following bugs are resolved with this release:
4065 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4066 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4067 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4068 777, 787, 821, 822, 823, 825
4070 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4074 * Support for RFC 3678. Real implementations exist only for Linux so far.
4075 Implemented by Ulrich Drepper.
4077 * nscd can now cache entries persistently. Expiring entries are reloaded.
4078 For speedups the cache can be shared in memory with client processes.
4079 Implemented by Ulrich Drepper.
4081 * nscd can now perform SELinux checks.
4082 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4084 * getaddrinfo queries are now cached. Canonical name lookup is performed
4086 Implemented by Ulrich Drepper.
4088 * The nothrow function attribute is used when headers are used by gcc when
4089 compiling C code. This can avoid significant amounts of exception
4092 * The malloc functions perform more error checking and are stricter when
4093 it comes to reacting on errors. The default action is to terminate
4094 the process after showing an error message. Implemented by Ulrich Drepper.
4096 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4097 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4099 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4100 namespaces using the new function dlmopen(). This feature is of course,
4101 like most other dynamic loading functionality, not available in statically
4102 linked applications. Implemented by Ulrich Drepper.
4104 * Low-overhead boundary checking variants of string and some stdio functions
4105 were added. These are to be used in conjunction with a gcc patch by
4106 Jakub Jelinek which adds calls to these functions if possible.
4107 Implemented by Jakub Jelinek and Ulrich Drepper.
4109 * Old code for several operating systems and machine architectures that
4110 have not been in working condition in a long time have been removed from
4111 the main source tree maintained by the GNU C Library's maintainers.
4112 These files are now reside in the separate `ports' source module
4113 that is usable as an add-on when building the library.
4117 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4118 interrogate the dynamic linker, compatible with the Solaris interface.
4120 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4121 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4123 * getifaddrs now uses the netlink interface on Linux to get its information.
4124 Implemented by Thorsten Kukuk.
4126 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4127 Implemented by Ulrich Drepper.
4129 * support for non-executable stacks on x86 has been added. Changes mostly
4132 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4135 * getaddrinfo now performs destination address selection according to
4140 * Thread-safe interfaces for many functions that access locale data
4141 were added in version 2.3, but these features were omitted from NEWS.
4142 Many functions have variants with an `_l' suffix that take a `locale_t'
4143 object as a parameter rather than consulting the current locale.
4144 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4145 create and maintain `locale_t' objects. Additionally, the new function
4146 `uselocale' sets "the current locale" (as used by functions not so
4147 parameterized) set for an individual thread. These features were added
4148 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4150 * The functions getresuid, getresgid, setresuid, and setresgid, which
4151 have long been available on Linux, are now declared in <unistd.h>
4152 and are now also available on the Hurd.
4154 * ELF thread-local storage support (TLS) now works on x86-64.
4156 * The new dynamic string token $LIB is expanded in shared library names.
4157 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4159 * Aldy Hernandez contributed complete software floating point support for
4160 PowerPC machines with no FPU.
4162 * fexecve is implemented on Linux.
4164 * The `btowc' function should work at least twice as fast due to
4165 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4167 * With approriate thread add-ons cancelable functions are now implemented
4168 in libc.so as well. No need to call the function in libpthread. This
4169 change allowed to finally disable the incorrect and expensive handling
4170 of weak definition in ld.so.
4172 * Yet more PLT entries in libc.so have been removed. We finally arrived
4173 at the bare minimum. Startup times improved appropriately.
4175 * Support for the new Linux/x86 system call interface was added. The
4176 AT_SYSINFO auxiliary vector entry is recognized and handled.
4180 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4183 * iconv (the program and the interface) now accepts empty names (excluding
4184 options like //TRANSLIT) to mean "use charset of current locale".
4186 * localedef can now transliterate characters in strings which are not in
4187 the provided charmap. The information from the input locale is used.
4189 * Prelinking support was added for ELF targets. This requires additional
4190 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4192 * Read-only stdio streams now use mmap to speed up operation by eliminating
4193 copying and buffer underflows. To use add 'm' to the mode string of
4194 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4196 * The malloc functions were completely rewritten by Wolfram Gloger based
4197 on Doug Lea's malloc-2.7.0.c.
4199 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4200 implementation of regex.
4202 * Bruno Haible upgraded the iconv and locale implementation to support
4205 * Contents of the LC_* and LANG environment variables in the CEN style are
4206 not recognized anymore. It never was used. Change by Ulrich Drepper.
4208 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4209 thread-local storage (TLS) ABI on some platforms.
4210 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4212 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4213 EUC-JISX0213, and TSCII.
4215 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4216 BSD-compatible interface for getting all network interface addresses.
4217 Implementation for IPv4 by Roland McGrath.
4219 * Loading of locale data is faster due to the introduction of a locale
4220 archive. Implemented by Roland McGrath and Ulrich Drepper.
4222 * Startup times are significantly reduced by not using exported functions
4223 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4226 * Steven Munroe contributed a port to PowerPC64/Linux.
4230 * The Hurd now uses the GNU libio implementation of stdio rather than the
4231 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4233 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4234 with the same behavior as the Linux system call of the same name.
4238 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4239 128-bit long double format.
4241 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4242 IBM1161, and IBM1162 charsets.
4244 * Andreas Jaeger contributed a port to x86-64/Linux.
4246 * Peter Bruin contributed a port to PowerPC/Hurd.
4248 * libc functions using I/O streams now can handle wide-oriented streams
4251 * optimizations in the dynamic linker. Binaries created by recent binutils
4252 versions start up quicker due to reduced time spent on relocations.
4254 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4258 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4259 asinh, atanh, j0 for the 128-bit long double format.
4261 * Bruno Haible updated all the code handling Unicode in some form to
4262 support Unicode 3.1.
4264 * Speed of regex for single-byte locales is back to previous levels.
4265 Patch by Isamu Hasegawa.
4267 * Alpha, SPARC, and IA-64 now also using floating stacks.
4269 * Startup time of internationalized applications greatly improved through
4270 iconv cache. Use iconvconfig to generate the cache file.
4271 Contributed by Ulrich Drepper.
4273 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4274 severe performance problems. Patch by David Mosberger.
4276 * The Hurd port got a lot more functionality like AIO, various stdio
4277 extensions, etc. Mainly done by Roland McGrath.
4279 * mtrace can now lookup symbols in shared libraries.
4283 * Intel's IA-64 math library is largely integrated. It provides fast and
4284 accurate implementatations for most basic and standard math functions
4285 in float, double, and long double format.
4287 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4288 and asin for the 96-bit long double format and asin, log, tan for the
4289 128-bit long double format.
4291 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4292 The basic double functions exist today. Contributed by Abraham Ziv
4293 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4294 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4296 * An asynchronous name lookup library was added. The interface is designed
4297 after POSIX AIO. The proposal was circulated beforehand to get comments.
4298 No negative ones came in. Implemented by Ulrich Drepper.
4300 * Port to S390/64bit contributed by Martin Schwidefsky
4301 <schwidefsky@de.ibm.com>.
4303 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4304 of functions for Linux/IA-64.
4306 * The RPC code is now thread safe. Threads can now use the same service
4307 of different services at the same time. Patch by Eric Norum
4308 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4310 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4311 family of functions for Linux/S390.
4313 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4314 of functions for Linux/x86.
4316 * Port to Linux/CRIS contributed by Axis Communications.
4320 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4321 we can now check for namespace violations and missing declarations. The
4322 result is that almost all headers are now Unix-compliant (as defined in
4323 the upcoming XPG6). The negative side is that some programs might need
4324 corrections, too, if they depend on the incorrect form of the headers in
4325 previous versions which defined too many symbols and included too many
4328 * regex now handles multibyte character sets correctly.
4329 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4331 * iconv (the program) does now conform to the upcoming XPG6 and handles
4332 charmaps. Instead of the charset names the path of charmaps can be
4333 provided and the conversion happens based on this data.
4334 Contributed by Ulrich Drepper.
4336 * The locale program now provides detailed information about the installed
4341 only lists the names of the supported locales
4345 provides details such as country, language, and codeset name.
4346 Contributed by Ulrich Drepper.
4350 * The gencat program now parses the input file according to the charset
4351 selected by the LC_CTYPE category. This is important for stateful
4352 character sets. To make generating catalogs easier there is a way
4353 to overwrite the charset selected by the locale: before the first
4354 message or $ quote line the catalog can contain a line like
4356 $ codeset=ISO-8859-2
4358 to select the charset (ISO-8859-2 in this case).
4360 Implemented by Shinya Hanataka and Ulrich Drepper.
4362 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4363 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4364 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4366 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4367 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4369 * The LANGUAGE environment variable is now ignored unless the locale is
4370 changed from the default "C" locale.
4372 * The usual bug fixes.
4376 * Greg McGary added runtime support for bounds checking using gcc's
4377 new -fbounded-pointers option. ix86 target is complete. PowerPC
4380 * Thorsten Kukuk added secure mode support to nscd.
4382 * The Berkeley db libraries have been removed.
4384 Related, the nss_db module is now in a separate package since it
4385 obviously requires a database library being available.
4387 * Wide character I/O streams implemented by Ulrich Drepper.
4389 * Functions from the extended socket API added by Ulrich Drepper.
4391 * Functions feenableexcept and fedisableexcept to control the
4392 behaviour of individual exceptions have been added by Andreas Jaeger.
4394 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4396 * The resolver code has been updated from bind 8.2.3-T5B which supports
4397 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4400 This change could in some situations effect backward compatibility. Since
4401 now `_res' is a thread-local instead of a global variable, modifying it
4402 in one thread does not have any effect in other threads.
4404 The resolver library was also extended to allow IPv6 as the transport
4405 protocol for the requests. This work was done by Stig Venaas.
4407 * Compatibility code for K&R C compilers has been removed from the
4408 header files. A ISO C compiler is needed to use the library
4409 (conforming to either C89 or C99 standard).
4411 * Complete rewrite of the localedef program to support multibyte character
4412 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4413 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4414 Implemented by Ulrich Drepper.
4416 Bruno Haible significantly improved the generation and use of the data
4417 structures for the wide character tables.
4419 * Plural handling in gettext implemented by Ulrich Drepper.
4421 * The utmp daemon has been removed.
4423 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4425 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4428 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4430 * POSIX barriers implemented by Kaz Kylheku.
4432 * POSIX spawn function family implemented by Ulrich Drepper.
4434 * POSIX spinlocks are now available.
4436 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4438 * the configure option --enable-kernel=X.Y.Z allows to strip out
4439 compatibility for kernel versions before X.Y.Z. This is currently only
4440 implemented for Linux.
4442 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4443 field sin6_scope_id. This means that all programs using IPv6 should be
4444 recompiled. Don't expect binary compatibility with previous glibc
4447 * various conversion modules for IBM character sets contributed by
4450 * IA-64 port by Jes Sorensen and HJ Lu.
4464 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4466 * New xdr functions are added; some rpc functions are now 64bit clean.
4468 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4470 * Fixed known incompatibilities with glibc 2.0.
4472 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4474 * Optimized a number of functions (especially the ELF dynamic loader).
4476 * Update timezone data files.
4478 * lots of charmaps corrections
4480 * some new locale definitions and charmaps
4485 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4486 conform to POSIX member type requirements. Symbol versions have been
4487 adjusted as needed within the library, and for direct use by applications,
4488 but there is potential for problems if third-party libraries use
4489 struct timeval as part of their interface. This does not present
4490 a problem for X and other "essential" system libraries.
4492 * An additional locale model to support C++ Standard Library locale
4493 model and probably more was implemented by Ulrich Drepper.
4495 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4498 * Miles Bader provided the `argp' function family to support hierachical
4499 command line argument parsing, layered on top of getopt.
4501 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4503 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4506 * scanf recognizes the %a and %A format for scanning floating point numbers.
4508 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4509 information and interfaces for the available integer types.
4511 * about 130 new math functions were added to implement the ISO C9x math
4514 * the new header <complex.h> contains definitions of the complex math
4515 functions from ISO C 9X.
4517 * the new header <tgmath.h> defines generic macros to use complex or
4518 real valued functions.
4520 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4522 * Andreas Jaeger provided a test suite for the math library.
4524 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4526 * Ulrich Drepper added character set conversion functions (iconv).
4528 * Optimized string functions have been added.
4530 * The localedata addon is now part of glibc.
4532 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4534 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4535 daemon for NSS (nscd).
4537 Missing a better place here are some numbers on improvements. Under
4538 Linux 2.1.125 un-tar-ing the kernel sources takes
4542 using local files 12.19s 6.88s 22.91s
4544 using NIS 13.92s 8.91s 26.34s
4546 using NIS & nscd 10.37s 7.34s 25.30s
4548 using NIS+ 27.57s 30.37s 640.46s
4550 using NIS+ & nscd 10.25s 7.83s 26.51s
4552 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4554 Keep in mind that non-namelookup related operations dominate above times.
4555 It was just a common complain that using NIS+ unpacking the kernel is
4558 [1] The old nscd implementation is not available anymore since it was
4559 distributed with glibc up to version 2.0.98 and thus is now replaced.
4561 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4563 * Mark Kettenis provided a Hesiod NSS module.
4565 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4566 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4568 * rcmd can now handle netgroups (Dick Streefland).
4570 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4573 * Support for the IPv6 protocol has been added to the socket API, as per the
4574 latest draft standards.
4576 * Support for Linux 2.2 has been added.
4578 * Interface changes relative to the latest 2.0.x release:
4579 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4580 addseverity NEW: Unix98
4581 alphasort64 NEW: LFS
4582 argp_err_exit_status NEW: argp, GNU ext
4583 argp_error NEW: argp, GNU ext
4584 argp_failure NEW: argp, GNU ext
4585 argp_help NEW: argp, GNU ext
4586 argp_parse NEW: argp, GNU ext
4587 argp_program_bug_address NEW: argp, GNU ext
4588 argp_program_version NEW: argp, GNU ext
4589 argp_program_version_hook NEW: argp, GNU ext
4590 argp_state_help NEW: argp, GNU ext
4591 argp_usage NEW: argp, GNU ext
4592 authdes_create NEW: Secure RPC
4593 authdes_getucred NEW: Secure RPC
4594 authdes_pk_create NEW: Secure RPC
4595 backtrace NEW: GNU ext.
4596 backtrace_symbols NEW: GNU ext.
4597 backtrace_symbols_fd NEW: GNU ext.
4599 cacosf NEW: ISO C 9x
4600 cacosh NEW: ISO C 9x
4601 cacoshf NEW: ISO C 9x
4602 cacoshl NEW: ISO C 9x
4603 cacosl NEW: ISO C 9x
4610 casinf NEW: ISO C 9x
4611 casinh NEW: ISO C 9x
4612 casinhf NEW: ISO C 9x
4613 casinhl NEW: ISO C 9x
4614 casinl NEW: ISO C 9x
4616 catanf NEW: ISO C 9x
4617 catanh NEW: ISO C 9x
4618 catanhf NEW: ISO C 9x
4619 catanhl NEW: ISO C 9x
4620 catanl NEW: ISO C 9x
4621 cbc_crypt NEW: Secure RPC
4625 ccoshf NEW: ISO C 9x
4626 ccoshl NEW: ISO C 9x
4632 cimagf NEW: ISO C 9x
4633 cimagl NEW: ISO C 9x
4634 clearerr_locked REMOVED
4635 clntunix_create NEW: sunrpc ext
4637 clog10 NEW: ISO C 9x
4638 clog10f NEW: ISO C 9x
4639 clog10l NEW: ISO C 9x
4649 cprojf NEW: ISO C 9x
4650 cprojl NEW: ISO C 9x
4652 crealf NEW: ISO C 9x
4653 creall NEW: ISO C 9x
4658 csinhf NEW: ISO C 9x
4659 csinhl NEW: ISO C 9x
4662 csqrtf NEW: ISO C 9x
4663 csqrtl NEW: ISO C 9x
4667 ctanhf NEW: ISO C 9x
4668 ctanhl NEW: ISO C 9x
4670 des_setparity NEW: Secure RPC
4671 ecb_crypt NEW: Secure RPC
4672 endutxent NEW: Unix98
4674 exp10f NEW: ISO C 9x
4675 exp10l NEW: ISO C 9x
4679 fattach NEW: STREAMS
4680 fdetach NEW: STREAMS
4684 feclearexcept NEW: ISO C 9x
4685 fegetenv NEW: ISO C 9x
4686 fegetexceptflag NEW: ISO C 9x
4687 fegetround NEW: ISO C 9x
4688 feholdexcept NEW: ISO C 9x
4690 feraiseexcept NEW: ISO C 9x
4691 ferror_locked REMOVED
4692 fesetenv NEW: ISO C 9x
4693 fesetexceptflag NEW: ISO C 9x
4694 fesetround NEW: ISO C 9x
4695 fetestexcept NEW: ISO C 9x
4696 feupdateenv NEW: ISO C 9x
4697 fflush_locked REMOVED
4701 fgets_unlocked NEW: GNU ext.
4702 fileno_locked REMOVED
4714 fputc_locked REMOVED
4715 fputs_unlocked NEW: GNU ext.
4716 fread_unlocked NEW: GNU ext.
4721 fstatvfs NEW: Unix98
4725 ftruncate64 NEW: LFS
4727 fwrite_unlocked NEW: GNU ext.
4728 gai_strerror NEW: IPv6
4732 getchar_locked REMOVED
4734 getdate_err NEW: Unix98
4735 getdate_r NEW: GNU ext.
4737 getnameinfo NEW: IPv6
4738 getnetname NEW: Secure RPC
4739 getpmsg NEW: STREAMS
4740 getpt NEW: Unix98 PTY
4741 getrlimit64 NEW: LFS
4742 getutxent NEW: Unix98
4743 getutxid NEW: Unix98
4744 getutxline NEW: Unix98
4745 glob64 NEW: GNU ext.
4746 globfree64 NEW: GNU ext.
4747 gnu_get_libc_release NEW: GNU ext.
4748 gnu_get_libc_version NEW: GNU ext.
4749 grantpt NEW: Unix98 PTY
4750 host2netname NEW: Secure RPC
4752 iconv_close NEW: iconv
4753 iconv_open NEW: iconv
4754 if_freenameindex NEW: IPv6
4755 if_indextoname NEW: IPv6
4756 if_nameindex NEW: IPv6
4757 if_nametoindex NEW: IPv6
4758 in6addr_any NEW: IPv6
4759 in6addr_loopback NEW: IPv6
4760 inet6_isipv4mapped NEW: IPv6
4761 isastream NEW: STREAMS
4762 iswblank NEW: GNU ext.
4763 key_decryptsession NEW: Secure RPC
4764 key_decryptsession_pk NEW: Secure RPC
4765 key_encryptsession NEW: Secure RPC
4766 key_encryptsession_pk NEW: Secure RPC
4767 key_gendes NEW: Secure RPC
4768 key_get_conv NEW: Secure RPC
4769 key_secretkey_is_set NEW: Secure RPC
4770 key_setnet NEW: Secure RPC
4771 key_setsecret NEW: Secure RPC
4772 llrint NEW: ISO C 9x
4773 llrintf NEW: ISO C 9x
4774 llrintl NEW: ISO C 9x
4775 llround NEW: ISO C 9x
4776 llroundf NEW: ISO C 9x
4777 llroundl NEW: ISO C 9x
4782 lrintf NEW: ISO C 9x
4783 lrintl NEW: ISO C 9x
4784 lround NEW: ISO C 9x
4785 lroundf NEW: ISO C 9x
4786 lroundl NEW: ISO C 9x
4788 makecontext NEW: Unix98
4789 mempcpy NEW: GNU ext.
4792 modify_ldt NEW: kernel
4796 nearbyint NEW: ISO C 9x
4797 nearbyintf NEW: ISO C 9x
4798 nearbyintl NEW: ISO C 9x
4799 netname2host NEW: Secure RPC
4800 netname2user NEW: Secure RPC
4801 nexttoward NEW: ISO C 9x
4802 nexttowardf NEW: ISO C 9x
4803 nexttowardl NEW: ISO C 9x
4807 passwd2des NEW: Secure RPC
4809 pow10f NEW: GNU ext.
4810 pow10l NEW: GNU ext.
4813 printf_size NEW: GNU ext.
4814 printf_size_info NEW: GNU ext.
4815 profil_counter REMOVED
4816 pthread_mutexattr_getkind_np REPLACED
4817 pthread_mutexattr_setkind_np REPLACED
4818 ptsname NEW: Unix98 PTY
4819 ptsname_r NEW: Unix98 PTY
4821 putchar_locked REMOVED
4822 putgrent NEW: GNU ext.
4824 putpmsg NEW: STREAMS
4825 pututxline NEW: Unix98
4829 readdir64_r NEW: LFS
4830 remquo NEW: ISO C 9x
4831 remquof NEW: ISO C 9x
4832 remquol NEW: ISO C 9x
4834 roundf NEW: ISO C 9x
4835 roundl NEW: ISO C 9x
4837 scalbln NEW: ISO C 9x
4838 scalblnf NEW: ISO C 9x
4839 scalblnl NEW: ISO C 9x
4841 sendfile NEW: kernel
4842 setcontext NEW: Unix98
4843 setrlimit64 NEW: LFS
4844 setutxent NEW: Unix98
4846 sigignore NEW: Unix98
4847 sigqueue NEW: POSIX.1b
4848 sigrelse NEW: Unix98
4849 sigset NEW: POSIX.1b
4850 sigtimedwait NEW: POSIX.1b
4851 sigwaitinfo NEW: POSIX.1b
4852 sincos NEW: GNU ext.
4853 sincosf NEW: GNU ext.
4854 sincosl NEW: GNU ext.
4858 strcasestr NEW: GNU ext.
4859 strtoimax NEW: ISO C 9x
4860 strtoumax NEW: ISO C 9x
4861 strverscmp NEW: GNU ext.
4862 svcauthdes_stats NEW: Secure RPC
4863 svcunix_create NEW: sunrpc etx
4864 svcunixfd_create NEW: sunrpc ext
4865 swapcontext NEW: Unix98
4866 tcgetsid NEW: Unix98 PTY
4867 tdestroy NEW: GNU ext.
4868 tgamma NEW: ISO C 9x
4869 tgammaf NEW: ISO C 9x
4870 tgammal NEW: ISO C 9x
4874 truncf NEW: ISO C 9x
4875 truncl NEW: ISO C 9x
4877 unlockpt NEW: Unix98 PTY
4878 updwtmpx NEW: Unix98
4879 user2netname NEW: Secure RPC
4880 utmpxname NEW: Unix98
4881 versionsort NEW: GNU ext.
4882 versionsort64 NEW: GNU ext.
4884 wcscasecmp NEW: GNU ext.
4885 wcsncasecmp NEW: GNU ext.
4886 wcsnlen NEW: GNU ext.
4887 wcstoimax NEW: ISO C 9x
4888 wcstoll NEW: ISO C 9x
4889 wcstoull NEW: ISO C 9x
4890 wcstoumax NEW: ISO C 9x
4892 wordexp NEW: POSIX.2
4893 wordfree NEW: POSIX.2
4894 write_profiling REMOVED
4895 xdecrypt NEW: Secure RPC
4896 xdr_authdes_cred NEW: Secure RPC
4897 xdr_authdes_verf NEW: Secure RPC
4898 xdr_cryptkeyarg NEW: Secure RPC
4899 xdr_cryptkeyarg2 NEW: Secure RPC
4900 xdr_cryptkeyres NEW: Secure RPC
4901 xdr_getcredres NEW: Secure RPC
4902 xdr_key_netstarg NEW: Secure RPC
4903 xdr_key_netstres NEW: Secure RPC
4904 xdr_keybuf NEW: Secure RPC
4905 xdr_keystatus NEW: Secure RPC
4906 xdr_netnamestr NEW: Secure RPC
4907 xdr_sizeof NEW: Secure RPC
4908 xdr_unixcred NEW: sunrpc ext
4909 xencrypt NEW: Secure RPC
4910 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4921 * inet_ntoa is thread-safe
4923 * updwtmp is moved from libutil to libc
4925 * rewrite of cbrt function
4927 * update of timezone data
4941 * add atoll function
4943 * fix complex problems in Berkeley DB code
4945 * fix math functions
4949 * fixed lots of header problems (especially Linux/GNU specific)
4951 * dynamic loader preserves all registers
4953 * Roland McGrath provided support for handling of auxiliary objects in
4954 the ELF dynamic loader.
4956 * support for parallel builds is improved
4960 * GNU extensions are no longer declared by default. To enable them you
4961 must define the macro `_GNU_SOURCE' in your program or compile with
4964 * The library has changed from using GNU ld symbol aliases to using weak
4965 symbols where available. The ELF object file format supports weak
4966 symbols; GNU ld also supports weak symbols in the a.out format. (There
4967 is also now support for other GNU ld extensions in ELF. Use the
4968 `--with-elf' option to configure to indicate you have ELF, and
4969 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4970 of many files which contained only symbol aliases, reducing the size of
4971 the source and the compiled library; many other files were renamed to
4972 less cryptic names previously occupied by the symbol alias files.
4973 There is a new header file <elf.h> for programs which operate on
4974 files in the ELF format.
4976 * Converted to Autoconf version 2, so `configure' has more options.
4977 Run `configure --help' to see the details.
4979 * The library can now be configured to build profiling, highly-optimized
4980 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4981 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4982 `configure' enable building these extra libraries. The shared library is
4983 built by default when using both ELF and GNU ld. When shared libraries
4984 are enabled, the new library `-ldl' is available for arbitrary run-time
4985 loading of shared objects; its interface is defined in <dlfcn.h>. The
4986 new header file <link.h> gives access to the internals of the run-time
4987 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4988 application of same name on other systems and it provides information
4989 about dynamically linked binaries.
4991 * The C library now provides the run-time support code for profiling
4992 executables compiled with `-pg'. Programs can control the profiling code
4993 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4994 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4995 the support for this file format was contributed by David Mosberger-Tang.
4997 * The math code has been replaced with a math library based on fdlibm from
4998 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4999 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5000 functions. The math functions now reside in a separate library, so
5001 programs using them will need to use `-lm' their linking commands.
5003 * John C. Bowman contributed optimized ix87 assembler inline functions.
5005 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5006 mechanism similar to that found in Solaris 2. This is now used for the
5007 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5008 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5009 file controls what services are used for each individual database. This
5010 works by loading shared libraries with names specified in `nsswitch.conf',
5011 so service modules can be changed or added at any time without even
5012 relinking any program. Currently there are the file, db, and NIS based
5013 NSS services available.
5015 * The new functions `strtoq' and `strtouq' parse integer values from
5016 strings, like `strtol' and `strtoul', but they return `long long int' and
5017 `unsigned long long int' values, respectively (64-bit quantities).
5019 * The new functions `strtof' and `strtold' parse floating-point values from
5020 strings, like `strtod', but they return `float' and `long double' values,
5021 respectively (on some machines `double' and `long double' are the same).
5023 * Ulrich Drepper has contributed new implementations of the floating-point
5024 printing and reading code used in the `printf' family of functions and
5025 `strtod', `strtof', and `strtold'. These new functions are perfectly
5026 accurate, and much faster than the old ones.
5028 * The implementation of the POSIX locale model was completely rewritten by
5029 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5030 to compile the POSIX locale definition.
5032 * The former dummy implementations of the strcoll and strxfrm function are
5033 now replaced by fully functional code contributed by Ulrich Drepper. The
5034 collation information comes from the POSIX locale definitions.
5036 * The new header <langinfo.h> defines an interface for accessing
5037 various locale-dependent data (using the locale chosen with `setlocale').
5039 * Ulrich Drepper has contributed a new suite of functions for operation on
5040 wide-character and multibyte-character strings, in <wchar.h>;
5041 and classification and case conversion of wide characters, in <wctype.h>.
5042 These new functions are conforming to the ISO C, Amendement 1 specification.
5044 * There is now a second implementation of the standard I/O library available.
5045 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5046 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5048 * You can now use positional parameter specifications in format strings
5049 for the `printf' and `scanf' families of functions. For example,
5050 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5051 ``Number 6, Mr Jones''. This is mainly useful when providing different
5052 format strings for different languages, whose grammars may dictate
5053 different orderings of the values being printed. To support this
5054 feature, the interface for `register_printf_handler' has changed; see
5055 the header file <printf.h> for details.
5057 * The `printf' and `scanf' families of functions now understand a new
5058 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5059 to group numbers as indicated by the locale; for `scanf' and friends, this
5060 says to accept as valid only a number with all the proper grouping
5061 separators in the right places. In the default "C" locale, numbers are
5062 not grouped; but locales for specific countries will define the usual
5063 conventions (i.e. separate thousands with `,' in the US locale).
5065 * The pgrp functions have been regularized, slightly incompatibly but much
5066 less confusingly. The core functions are now `getpgid' and `setpgid',
5067 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5068 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5069 provided for compatibility. There is no longer an incompatible `getpgrp'
5070 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5072 * The new header file <fts.h> and suite of functions simplify programs that
5073 operate on directory trees. This code comes from 4.4 BSD.
5075 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5076 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5077 NSS scheme used in glibc.
5079 * There is a new malloc debugging hook `__memalign_hook'.
5081 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5082 `unsigned int' in <sys/types.h>. These are for compatibility only and
5083 their use is discouraged.
5085 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5086 done differently, so that it works even without GNU ld.
5088 * New function `euidaccess' checks allowed access to a file like `access',
5089 but using the effective IDs instead of the real IDs.
5091 * The time zone data files have been updated for the latest and greatest
5092 local time conventions of the countries of the world.
5094 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5097 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5098 for formatting floating-point numbers. They are provided only for
5099 compatibility; new programs should use `sprintf' instead. There are
5100 also equivalent function for the `long double' floating-point type and
5101 all functions also exist in a reentrant form.
5103 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5104 functions for maintaining the login-record files (primarily of use to
5105 system programs such as `login'), and convenient functions for
5106 allocating and initializing a pseudo-terminal (pty) device.
5108 * Ulrich Drepper has contributed new support for System V style
5109 shared memory and IPC on systems that support it.
5111 * Ulrich Drepper has contributed several miscellaneous new functions found
5112 in System V: The `hsearch' family of functions provide an effective
5113 implementation of hash tables; `a64l' and `l64a' provide a very simple
5114 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5117 * Ulrich Drepper has contributed new reentrant counterparts for the
5118 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5120 * Ulrich Drepper has contributed new, highly-optimized versions of several
5121 string functions for the i486/Pentium family of processors.
5123 * Ulrich Drepper has updated the Linux-specific code, based largely
5124 on work done in Hongjiu Lu's version of GNU libc for Linux.
5125 The GNU library now supports Linux versions 2.0.10 and later,
5126 using the ELF object file format (i[3456]86-*-linux).
5128 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5130 * David Mosberger-Tang and Richard Henderson have ported the C library
5131 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5132 dynamic linking support for ELF/Alpha.
5134 * Richard Henderson contributed several Alpha optimized assembler function
5135 for arithmetic and string handling.
5137 * Ulrich Drepper has contributed a new set of message catalog functions to
5138 support multiple languages using the <libintl.h> interface, for use with
5139 his new package GNU gettext. Translation volunteers have contributed
5140 catalogs of the library's messages in Spanish, German, and Korean.
5142 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5143 program and the `catgets' function for reading the catalog files it
5144 creates. (The <libintl.h> interface is preferred; we include the
5145 <nl_types.h> interface using `catgets' only for source compatibility with
5146 programs already written to use it.)
5148 * New header file <values.h> gives SVID-compatible names for <limits.h>
5151 * Various new macros, declarations, and small header files for compatibility
5154 * New function `group_member' is a convenient way to check if a process has
5155 a given effective group ID.
5157 * When using GCC 2.7 and later, the socket functions are now declared in a
5158 special way so that passing an argument of type `struct sockaddr_in *',
5159 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5160 `struct sockaddr *' type, does not generate a type-clash warning.
5162 * New function `error' declared in header file <error.h> is a convenient
5163 function for printing error messages and optionally exiting; this is the
5164 canonical function used in GNU programs. The new functions `err', `warn',
5165 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5166 doing the same thing.
5168 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5169 POSIX.2 `glob' function to do ~ and {...} expansion.
5171 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5172 `clearenv' which is used in POSIX.9 is also available.
5174 * New function `getsid' returns session ID number on systems that support it.
5176 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5177 files <db.h> and <mpool.h> provide a rich set of functions for several
5178 types of simple databases stored in memory and in files, and <ndbm.h> is
5179 an old `ndbm'-compatible interface using the `db' functions. Link with
5180 `-ldb' to get these functions.
5182 * New macro `strdupa' copies a string like `strdup', but uses local stack
5183 space from `alloca' instead of dynamic heap space from `malloc'.
5185 * New function `strnlen' is like `strlen' but searches only a given maximum
5186 number of characters for the null terminator. `stpncpy', `strndup' and
5187 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5190 * New function `statfs' in header <sys/statfs.h>.
5192 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5193 provide convenient functions for operating on blocks of null-terminated
5196 * A new suite of functions in <utmp.h> handle all the details of reading
5197 and writing the utmp file.
5199 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5202 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5203 completely POSIX compliant and also implemented the extended functionality
5204 to handle alternate digit representation and alternate era date formats.
5206 * Ulrich Drepper provided an implementation of the `strptime' function
5207 defined in XPG4.2 which transforms a string into a `struct tm' value.
5209 * Paul Eggert provided the tzselect shell script as part of the timezone
5210 code. The shell script makes it easy to select the correct timezone
5213 * The implementation of the malloc family of functions is completely replaced
5214 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5215 The implementation uses the mmap function (if available) and it is
5216 optimized for the use in multi threaded programs.
5218 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5219 functions. This new functionality is usable by specifying a special
5220 salt string and it is compatible with implementation on *BSD systems.
5222 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5223 `getsubopt' to handle second level command line options, `bsd_signal'
5224 to access BSD style `signal' functionality, the obsolete `regexp' style
5227 * the `lchown' function is available on system which support this
5230 * The implementation of the shadow password handling function was contributed
5233 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5235 * POSIX.1g support was added. The <sys/select.h> header is available,
5236 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5237 implementation of `getaddrinfo'.
5241 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5243 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5244 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5246 * The new function `daemon' from 4.4 BSD is useful for server programs that
5247 want to put themselves in the background.
5249 * Joel Sherrill has contributed support for several standalone boards that
5250 run without an operating system.
5252 * `printf', `scanf' and friends now accept a `q' type modifier for long
5253 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5255 * All of the code taken from BSD (notably most of the math and networking
5256 routines) has been updated from the BSD 4.4-Lite release.
5258 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5260 * The new functions `getdomainname' and `setdomainname' fetch or change the
5261 YP/NIS domain name. These are system calls which exist on systems which
5264 * The time zone data files have been updated for the latest international
5267 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5268 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5272 * The C library now includes support for Sun RPC, from Sun's free
5273 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5274 are included. (There is still no support for YP.)
5276 * Tom Quinn has contributed a port of the C library to SGI machines running
5277 Irix 4 (mips-sgi-irix4).
5279 * The new `lockf' function is a simplified interface to the locking
5280 facilities of `fcntl', included for compatibility.
5282 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5284 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5286 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5289 * The error message printed by `assert' for a failed assertion now includes
5290 the name of the program (if using GNU ld) and the name of the calling
5291 function (with versions of GCC that support this).
5293 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5295 * The library now includes the <sys/mman.h> header file and memory
5296 management functions `mmap', `munmap', `mprotect', `msync', and
5297 `madvise', on systems that support those facilities.
5299 * The interface for `mcheck' has changed slightly: the function called to
5300 abort the program when an allocation inconsistency is detected now takes
5301 an argument that indicates the type of failure. The new function
5302 `mprobe' lets you request a consistency check for a particular block at
5303 any time (checks are normally done only when you call `free' or `realloc'
5306 * It is now possible to easily cross-compile the C library, building on one
5307 system a library to run on another machine and/or operating system. All
5308 you need to do is set the variable `HOST_CC' in `configparms' to the
5309 native compiler for programs to run on the machine you are building on (a
5310 few generator programs are used on Unix systems); set `CC' to the
5313 * The new function `fexecve' (only implemented on the GNU system) executes
5314 a program file given a file descriptor already open on the file.
5318 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5319 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5321 * You can set the variable `libprefix' in `configparms' to specify a prefix
5322 to be prepended to installed library files; this makes it easy to install
5323 the GNU C library to be linked as `-lgnuc' or whatever.
5325 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5326 copies a limited number of characters from a string, and returns the
5327 address of the last character written.
5329 * You no longer need to check for whether the installed `stddef.h' is
5330 compatible with the GNU C library. configure now checks for you.
5332 * You can now define a per-stream `fileno' function to convert the
5333 stream's cookie into an integral file descriptor.
5335 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5336 allocates zero bytes of storage, and returns a unique pointer which
5337 you can pass to `realloc' or `free'. The behavior is undefined if
5338 you dereference this pointer.
5340 * The C library now runs on Sony NEWS m68k machines running either
5341 NewsOS 3 or NewsOS 4.
5343 * The new `syscall' function is a system-dependent primitive function
5344 for invoking system calls. It has the canonical behavior on Unix
5345 systems, including unreliable return values for some calls (such as
5346 `pipe', `fork' and `getppid').
5348 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5349 to `EAGAIN', which is the preferred name. On systems whose kernels
5350 use two distinct codes, the C library now translates EWOULDBLOCK to
5351 EAGAIN in every system call function.
5355 * The GNU C Library Reference Manual is now distributed with the library.
5356 `make dvi' will produce a DVI file of the printed manual.
5357 `make info' will produce Info files that you can read on line using C-h i
5358 in Emacs or the `info' program.
5359 Please send comments on the manual to bug-glibc-manual@gnu.org.
5361 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5363 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5365 * Jason Merrill has contributed a port to the Sequent Symmetry running
5366 Dynix version 3 (i386-sequent-dynix).
5368 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5369 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5371 * New function `memory_warnings' lets you arrange to get warnings when
5372 malloc is running out of memory to allocate, like Emacs gives you.
5374 * The C library now contains the relocating allocator used in Emacs 19 for
5375 its editing buffers. This allocator (ralloc) minimizes allocation
5376 overhead and fragmentation by moving allocated regions around whenever it
5377 needs to. You always refer to a ralloc'd region with a "handle" (a
5378 pointer to a pointer--an object of type `void **').
5380 * There is a new `printf' format: `%m' gives you the string corresponding
5381 to the error code in `errno'.
5383 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5384 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5385 pass, the `a' modifier says to fill in a `char **' you pass with a
5388 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5389 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5390 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5392 * `mkstemp' is a traditional Unix function to atomically create and open a
5393 uniquely-named temporary file.
5397 * The standard location for the file that says what the local timezone is
5398 has changed again. It is now `/usr/local/etc/localtime' (or more
5399 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5401 * The distribution no longer contains any files with names longer than 14
5404 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5405 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5407 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5411 * The configuration process has changed quite a bit. The `configure'
5412 script is now used just like the configuration scripts for other GNU
5413 packages. The `sysdeps' directory hierarchy is much rearranged.
5414 The file `INSTALL' explains the new scheme in detail.
5416 * The header files no longer need to be processed into ANSI C and
5417 traditional C versions. There is just one set of files to install, and
5418 it will work with ANSI or old C compilers (including `gcc -traditional').
5420 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5421 MIPS DECStation running Ultrix 4.
5423 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5424 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5425 made itself into a shared library.
5427 * Yet further improved support for the i386, running 4.3 BSD-like systems
5428 (such as Mach 3 with the Unix single-server), or System V.
5430 * New function `strncasecmp' to do case-insensitive string comparison
5431 with limited length.
5433 * New function `strsep' is a reentrant alternative to `strtok'.
5435 * New functions `scandir' and `alphasort' for searching directories.
5437 * New function `setenv' is a better interface to `putenv'.
5439 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5440 function for traversing a directory tree.
5442 * The GNU obstack package is now also part of the C library.
5443 The new function `open_obstack_stream' creates a stdio stream that
5444 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5445 formatted output directly to an obstack.
5447 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5448 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5450 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5452 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5453 things to your strings.
5455 * There are some new test programs: test-fseek, testmb, and testrand.
5457 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5458 These ports are not finished, but are a good starting place for really
5459 supporting those systems.
5461 * `/etc/localtime' is now the standard location for the file that says what
5462 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5463 This follows the general principle that `/etc' is the place for all local
5464 configuration files.
5466 * The C library header files now use `extern "C"' when used by the C++
5467 compiler, so the C library should now work with C++ code.
5469 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5470 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5473 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5474 function which uses the `merge sort' algorithm, and is said to be
5475 significantly faster than the old GNU `qsort' function. Merge sort is
5476 now the standard `qsort' function. The new algorithm can require a lot
5477 of temporary storage; so, the old sorting function is called when the
5478 required storage is not available.
5480 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5481 provides the Unix `crypt' function, plus some other entry points.
5483 * The code and header files taken from 4.4 BSD have been updated with the
5484 latest files released from Berkeley.
5486 ----------------------------------------------------------------------
5487 Copyright information:
5489 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5491 Permission is granted to anyone to make or distribute verbatim copies
5492 of this document as received, in any medium, provided that the
5493 copyright notice and this permission notice are preserved,
5494 thus giving the recipient permission to redistribute in turn.
5496 Permission is granted to distribute modified versions
5497 of this document, or of portions of it,
5498 under the above conditions, provided also that they
5499 carry prominent notices stating who last changed them.
5502 version-control: never