1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2014 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
13 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16198, 16284, 16287,
14 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516, 16532, 16539,
15 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609, 16610, 16611,
16 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642, 16648, 16649,
17 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695, 16701, 16706,
18 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740, 16743, 16754,
19 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796, 16799, 16800,
20 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854, 16876, 16877,
21 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915, 16916, 16917,
22 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965, 16966, 16967,
23 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031, 17042, 17048,
24 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079, 17084, 17086,
25 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153, 17213, 17261.
27 * Reverted change of ABI data structures for s390 and s390x:
28 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
29 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
30 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
31 are preserved pointing straight to the same implementation as the old ones.
32 Given that, new callers wil simply provide a too-big buffer to these
33 functions. Any applications/libraries out there that embed jmp_buf or
34 ucontext_t in an ABI-relevant data structure that have already been rebuilt
35 against 2.19 headers will have to rebuilt again. This is necessary in any
36 case to revert the breakage in their ABI caused by the glibc change.
38 * Support for file description locks is added to systems running the
39 Linux kernel. The standard file locking interfaces are extended to
40 operate on file descriptions, not file descriptors, via the use of
41 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
42 are associated with an open file instead of a process.
44 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
46 * The minimum Linux kernel version that this version of the GNU C Library
47 can be used with is 2.6.32.
49 * Running the testsuite no longer terminates as soon as a test fails.
50 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
51 with PASS or FAIL lines for individual tests. A summary of the results is
52 printed, including a list of failing lists, and "make check" exits with
53 error status if there were any unexpected failures. "make check
54 stop-on-test-failure=y" may be used to keep the old behavior.
56 * The am33 port, which had not worked for several years, has been removed
59 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
60 supported; they now act the same as _DEFAULT_SOURCE (but generate a
61 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
62 conflicted with POSIX (support for which was removed in 2.19), the
63 interfaces those macros enabled remain available when compiling with
64 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
67 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
69 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
70 This may improve lock scaling of existing programs on TX capable systems.
71 The lock elision code is only built with --enable-lock-elision=yes and
72 then requires a GCC version supporting the TX builtins. With lock elision
73 default mutexes are elided via __builtin_tbegin, if the cpu supports
74 transactions. By default lock elision is not enabled and the elision code
77 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
78 copy the path argument. This allowed programs to cause posix_spawn to
79 deference a dangling pointer, or use an unexpected pathname argument if
80 the string was modified after the posix_spawn_file_actions_addopen
83 * All supported architectures now use the main glibc sysdeps directory
84 instead of some being in a separate "ports" directory (which was
85 distributed separately before glibc 2.17).
87 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
88 On configurations that support it (all Linux configurations), it's now
89 used regardless of the --enable-add-ons switch to configure. It is no
90 longer possible to build such configurations without pthreads support.
92 * Locale names, including those obtained from environment variables (LANG
93 and the LC_* variables), are more tightly checked for proper syntax.
94 setlocale will now fail (with EINVAL) for locale names that are overly
95 long, contain slashes without starting with a slash, or contain ".." path
96 components. (CVE-2014-0475) Previously, some valid locale names were
97 silently replaced with the "C" locale when running in AT_SECURE mode
98 (e.g., in a SUID program). This is no longer necessary because of the
101 * On x86-64, the dynamic linker's lazy-binding support is now compatible
102 with application code using Intel MPX instructions. (With all previous
103 versions, the MPX register state could be clobbered when making calls
104 into or out of a shared library.) Note that while the new dynamic
105 linker is compatible with all known x86 hardware whether or not it
106 supports Intel MPX, some x86 instruction-set emulators might fail to
107 handle the new instruction encodings. This is known to affect Valgrind
108 versions up through 3.9 (but will be fixed in the forthcoming 3.10
109 release), and might affect other tools that do instruction emulation.
113 * The following bugs are resolved with this release:
115 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
116 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
117 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
118 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
119 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
120 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
121 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
122 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
123 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
124 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
125 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
126 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
127 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
128 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
129 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
130 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
131 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
132 16431, 16453, 16474, 16506, 16510, 16529
134 * Slovenian translations for glibc messages have been contributed by the
135 Translation Project's Slovenian team of translators.
137 * The public headers no longer use __unused nor __block. This change is to
138 support compiling programs that are derived from BSD sources and use
139 __unused internally, and to support compiling with Clang's -fblock
140 extension which uses __block.
142 * CVE-2012-4412 The strcoll implementation caches indices and rules for
143 large collation sequences to optimize multiple passes. This cache
144 computation may overflow for large collation sequences and may cause a
145 stack or buffer overflow. This is now fixed to use a slower algorithm
146 which does not use a cache if there is an integer overflow.
148 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
149 rules for large collation sequences to optimize multiple passes and falls
150 back to alloca if malloc fails, resulting in a possible stack overflow.
151 The implementation now falls back to an uncached collation sequence lookup
154 * CVE-2013-4788 The pointer guard used for pointer mangling was not
155 initialized for static applications resulting in the security feature
156 being disabled. The pointer guard is now correctly initialized to a
157 random value for static applications. Existing static applications need
158 to be recompiled to take advantage of the fix (bug 15754).
160 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
161 to the d_name member of struct dirent, or omit the terminating NUL
162 character. (Bugzilla #14699).
164 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
165 aligned_alloc functions could allocate too few bytes or corrupt the
166 heap when passed very large allocation size values (Bugzilla #15855,
169 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
170 for AF_INET6 has been fixed (Bugzilla #16072).
172 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
173 pap_CW, quz_PE, the_NP.
175 * Substantially revised locales: gd_GB, ht_HT
177 * The LC_ADDRESS field was updated to support country_car for almost all
180 * ISO 1427 definitions were updated.
182 * ISO 3166 definitions were updated.
184 * The localedef utility now supports --big-endian and --little-endian
185 command-line options to generate locales for a different system from that
186 for which the C library was built.
188 * Binary locale files now only depend on the endianness of the system for
189 which they are generated and not on other properties of that system. As a
190 consequence, binary files generated with new localedef may be incompatible
191 with old versions of the GNU C Library, and binary files generated with
192 old localedef may be incompatible with this version of the GNU C Library,
193 in the following circumstances:
195 + Locale files may be incompatible on m68k systems.
197 + Locale archive files (but not separate files for individual locales) may
198 be incompatible on systems where plain "char" is signed.
200 * The configure option --disable-versioning has been removed. Builds with
201 --disable-versioning had not worked for several years.
203 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
204 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
206 * SystemTap probes for malloc have been introduced.
208 * SystemTap probes for slow multiple precision fallback paths of
209 transcendental functions have been introduced.
211 * Support for powerpc64le has been added.
213 * The soft-float powerpc port now supports e500 processors.
215 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
217 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
218 set of header declarations that are enabled by default, even when other
219 feature test macros or compiler options such as -std=c99 would otherwise
220 disable some of those declarations.
222 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
223 conflict with POSIX. The libbsd-compat library (which was a dummy library
224 that did nothing) has also been removed.
226 * Preliminary documentation about Multi-Thread, Async-Signal and
227 Async-Cancel Safety has been added.
229 * Change of ABI data structures for s390 and s390x:
230 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
231 allow for future hardware extensions. All library functions that accept or
232 return these structures were versioned in order to provide backwards
233 compatibility with existing code. However, not all cases can be handled
234 with interface versioning. If an application embeds either structure into
235 another structure and that structure is passed to another compilation unit
236 which expects the newer larger-sized object then any access to the new
237 fields will result in undefined behaviour. Similarly any access to fields
238 that were moved by the enlarging of the structures will cause undefined
239 behaviour. To fix the undefined behaviour all objects that are part of the
240 final in-memory image must agree on the size of structures, and this may
241 require recompilation.
245 * The following bugs are resolved with this release:
247 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
248 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
249 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
250 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
251 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
252 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
253 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
254 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
255 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
256 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
257 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
258 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
259 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
262 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
263 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
264 Distributions can re-enable building and using pt_chown via the new configure
265 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
266 considerable security risks and should only be used if the distribution
267 understands and accepts the risks.
269 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
272 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
273 fixed (Bugzilla #15330).
275 * Add support for calling C++11 thread_local object destructors on thread
276 and program exit. This needs compiler support for offloading C++11
277 destructor calls to glibc.
279 * Improved worst case performance of libm functions with double inputs and
282 * Support for priority inherited mutexes in pthread condition variables on
283 non-x86 architectures.
285 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
287 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
289 * Optimized string functions for ARM. Implemented by Will Newton and
292 * Optimized libm functions for SPARC. Implemented by David S. Miller.
294 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
297 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
298 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
300 * Added a benchmark framework to track performance of functions in glibc.
302 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
303 It is based on draft TS 18661 and currently enabled as a GNU extension.
305 * On Linux, the clock function now uses the clock_gettime system call
306 for improved precision, rather than old times system call.
308 * Added support for version-3 tz format files. This is needed when using
309 the tz database release 2013e or later, and affects a few unusual cases --
310 currently only TZ='America/Godthab' for time stamps after 2037.
312 * Added new API functions pthread_getattr_default_np and
313 pthread_setattr_default_np to get and set the default pthread
314 attributes of a process.
316 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
317 This may improve lock scaling of existing programs on TSX capable systems.
318 When the --enable-lock-elision=yes parameter is specified at configure
319 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
322 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
323 availability). Implemented by Ryan S. Arnold.
325 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
329 * The following bugs are resolved with this release:
331 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
332 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
333 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
334 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
335 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
336 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
337 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
338 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
339 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
340 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
341 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
342 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
343 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
344 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
345 14879, 14889, 14893, 14898, 14914.
347 * Optimization of memcpy for MIPS.
349 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
350 EMFILE has been fixed (Bugzilla #14889).
352 * The add-on ports collection is now distributed in the "ports" subdirectory
353 of the main GNU C Library distribution, rather than separately.
355 * Port to ARM AArch64 contributed by Linaro.
357 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
358 Optimized versions of memcpy, memset, and memcmp added for System z10 and
360 Implemented by Andreas Krebbel.
362 * The new function secure_getenv allows secure access to the environment,
363 returning NULL if running in a SUID/SGID process. This function replaces
364 the internal function __secure_getenv.
366 * SystemTap static probes have been added into the dynamic linker.
367 Implemented by Gary Benson.
369 * Optimizations of string functions strstr, strcasestr and memmem.
370 Implemented by Maxim Kuvyrkov.
372 * The minimum Linux kernel version that this version of the GNU C Library
373 can be used with is 2.6.16.
375 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
376 powerpc POWER7. Implemented by Will Schmidt.
378 * New configure option --disable-nscd builds the C library such that it
379 never attempts to contact the Name Service Caching Daemon (nscd).
380 New configure option --disable-build-nscd avoids building nscd itself;
381 this is the default if --disable-nscd is used.
383 * Improved support for cross-compilation, including cross-testing and
384 bootstrap builds without a previously built glibc.
386 * Several testsuite tests are now able to test multiple IFUNC variants of an
387 interface, rather than just testing the one that would be chooen by
390 * New configure options --with-bugurl and --with-pkgversion, for
391 distributors to use to embed their bug-reporting and package version
392 information in --help and --version output.
394 * The ttyname and ttyname_r functions on Linux now fall back to searching for
395 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
396 allows creation of chroots without the procfs mounted on /proc.
398 * The `crypt' function now fails if passed salt bytes that violate the
399 specification for those values. On Linux, the `crypt' function will
400 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
401 enabled, and fail on encrypted strings using the MD5 or DES algorithm
402 when the mode is enabled.
404 * The `clock_*' suite of functions (declared in <time.h>) is now available
405 directly in the main C library. Previously it was necessary to link with
406 -lrt to use these functions. This change has the effect that a
407 single-threaded program that uses a function such as `clock_gettime' (and
408 is not linked with -lrt) will no longer implicitly load the pthreads
409 library at runtime and so will not suffer the overheads associated with
410 multi-thread support in other code such as the C++ runtime library.
412 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
417 * The following bugs are resolved with this release:
419 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
420 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
421 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
422 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
423 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
424 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
425 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
426 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
427 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
428 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
429 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
430 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
431 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
432 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
433 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
434 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
435 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
436 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
437 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
438 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
439 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
440 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
443 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
444 configuring glibc with:
445 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
446 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
447 Implemented by H.J. Lu.
451 + define static_assert
453 + do not declare gets
455 + declare at_quick_exit and quick_exit also for ISO C11
457 + aligned_alloc. NB: The code is deliberately allows the size parameter
458 to not be a multiple of the alignment. This is a moronic requirement
459 in the standard but it is only a requirement on the caller, not the
464 + uchar.h support added
466 + CMPLX, CMPLXF, CMPLXL added
468 Implemented by Ulrich Drepper.
470 * Support for the IA-64 has been moved to ports.
472 * Remove support for anything but ELF binary format
474 * Checking versions of poll, ppoll added.
475 Implemented by Ulrich Drepper.
477 * More generic and 64-bit performance optimizations to math functions.
478 Implemented by Ulrich Drepper.
480 * New configure option --enable-obsolete-rpc makes the deprecated RPC
481 headers and functions available at compile time as they were before
482 version 2.14. This option will be removed at some time in the future
483 after the TI-RPC library becomes fully sufficient for the needs of
484 existing applications.
486 * Compatibility code for Linux kernel versions before 2.4 has been removed.
487 Note that glibc is not expected to work with any Linux kernel version
490 * New header <sys/auxv.h> and function getauxval allowing easy access to
491 the AT_* key-value pairs passed from the Linux kernel. The header also
492 defines the HWCAP_* bits associated with the AT_HWCAP key.
494 * New locales: mag_IN
496 * New configure option --enable-systemtap builds SystemTap static probes
497 into libc for setjmp and longjmp and into libpthread for various operations.
498 So far the setjmp/longjmp probes and some of the libpthread probes are
499 provided only for i*86 and x86_64.
500 Implemented by Roland McGrath and Rayson Ho.
502 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
504 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
507 * More optimized functions for SPARC. Implemented by David S. Miller.
509 * Improved support for cross-compilation, especially bootstrap builds
510 without a previously built glibc.
512 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
513 Chris Metcalf from Tilera.
515 * Support for the old ARM ABI has been removed from ports. Only the EABI is
516 now supported for ARM processors.
518 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
519 as the name of the dynamic linker, to distinguish it from the
520 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
522 * Support for CRIS has been removed from ports.
524 * A new class of installed header has been documented for low-level
525 platform-specific functionality. PowerPC added the first instance with a
526 function to provide time base register access. Contributed by Tulio
527 Magno Quites Machado Filho.
529 * ix86 configurations now install header files that are consistent with
530 what x86-64 configurations install. These same header files can be used
531 for -m32, -m64, or -mx32 builds.
532 Contributed by H.J. Lu.
534 * Math library bug fixes. A thorough audit of all open math library bugs was
535 conducted by Joseph Myers. Significant progress was made on many math
536 library bugs resulting in more accurate exceptions and function results.
537 Many thanks to all those that contributed including Andreas Jaeger for his
538 patch review and work on the x87 trigonometric instruction issues.
540 * Timezone data is no longer installed. Timezone-related binaries and scripts
541 will continue to be installed. Users should obtain their timezone data from
542 their distribution provider or from the tzdata package at
543 <ftp://munnari.oz.au/pub/>.
547 * The following bugs are resolved with this release:
549 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
550 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
551 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
552 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
553 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
554 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
555 13484, 13506, 13515, 13523, 13524, 13538, 13540
557 * New program pldd to list loaded object of a process
558 Implemented by Ulrich Drepper.
560 * Add nss_db support back to glibc. No more dependency on Berkeley db
561 and support for initgroups lookups.
562 Implemented by Ulrich Drepper.
564 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
565 Contributed by HJ Lu.
567 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
568 Contributed by HJ Lu.
570 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
571 on x86-32 and x86-64.
572 Contributed by Liubov Dmitrieva.
574 * Optimized strchr and strrchr for SSE on x86-32.
575 Contributed by Liubov Dmitrieva.
577 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
578 for x86-64 and x86-32.
579 Contributed by Liubov Dmitrieva.
581 * New interfaces: scandirat, scandirat64
582 Implemented by Ulrich Drepper.
584 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
585 Implemented by Ulrich Drepper.
587 * nscd now also caches the netgroup database.
588 Implemented by Ulrich Drepper.
590 * Integrate libm with gcc's -ffinite-math-only option.
591 Implemented by Ulrich Drepper.
593 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
594 to math functions. Implemented by Ulrich Drepper.
596 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
597 Implemented by Ulrich Drepper.
599 * New Linux interfaces: process_vm_readv, process_vm_writev
601 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
602 Implemented by Ulrich Drepper.
604 * Optimized nearbyint and strcasecmp for PPC.
605 Implemented by Adhemerval Zanella.
607 * New locales: bho_IN, unm_US, es_CU, ta_LK
611 * The following bugs are resolved with this release:
613 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
614 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
615 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
616 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
617 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
618 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
619 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
620 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
621 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
622 12795, 12811, 12813, 12814, 12841
624 * The RPC implementation in libc is obsoleted. Old programs keep working
625 but new programs cannot be linked with the routines in libc anymore.
626 Programs in need of RPC functionality must be linked against TI-RPC.
627 The TI-RPC implementation is IPv6 enabled and there are other benefits.
629 Visible changes of this change include (obviously) the inability to link
630 programs using RPC functions without referencing the TI-RPC library and the
631 removal of the RPC headers from the glibc headers.
632 Implemented by Ulrich Drepper.
634 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
635 syncfs, setns, sendmmsg
637 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
638 yue_HK, lij_IT, mhr_RU
640 * New encodings: CP770, CP771, CP772, CP773, CP774
642 * New program sotruss to trace calls through PLTs
643 Implemented by Ulrich Drepper.
645 * The malloc hook implementation is marked deprecated and will be removed
646 from the default implementation in the next version. The design never
647 worked ever since the introduction of threads. Even programs which do
648 not create threads themselves can use multiple threads created internally.
652 * The following bugs are resolved with this release:
654 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
655 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
656 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
657 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
660 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
662 * POWER7 optimizations: memset, memcmp, strncmp
664 * New optimized string functions for x86-64: strnlen (SSE2),
665 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
666 Implemented by Ulrich Drepper.
670 * The following bugs are resolved with this release:
672 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
673 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
674 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
675 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
676 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
677 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
678 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
679 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
681 * New interfaces: pthread_getname_np, pthread_setname_np
683 * New Linux interface: recvmmsg
685 * STT_GNU_IFUNC implemented for Sparc by David Miller.
687 * The dynamic linker now recognizes supported ABI versions from the
688 EI_ABIVERSION field in the ELF header.
689 Implemented by Ulrich Drepper.
691 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
692 will not be used to fill in password fields in the passwd.byname replies.
693 Instead it is used to synthesize the shadow.byname table, should it be
694 missing. This is a useful mode in some installations involving Solaris.
695 Implemented by Ulrich Drepper.
697 * New locales: kok_IN, sq_MK, cv_RU
701 * The following bugs are resolved with this release:
703 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
704 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
705 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
706 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
707 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
708 10789, 10817, 10823, 10840, 10847
710 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
712 Implemented by Ulrich Drepper.
714 * Checking version of longjmp added that fails if an uninitialized stack
715 frame would be created. Implemented by Ulrich Drepper.
717 * STT_GNU_IFUNC is now supported in static executables.
718 Implemented by H.J. Lu.
720 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
722 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
723 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
724 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
725 Contributed by H.J. Lu.
727 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
728 Implemented by Ulrich Drepper.
730 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
732 Contributed by H.J. Lu.
734 * Support for fma instruction in AVX on x86-64.
735 Implemented by H.J. Lu and Ulrich Drepper.
737 * AVX support in x86-64 auditing support in ld.so.
738 Implemented by H.J. Lu.
740 * STB_GNU_UNIQUE support added.
741 Implemented by Ulrich Drepper.
743 * Implement second fallback mode for optimized DNS lookup for even more
744 broken environments. If two requests from the same port are not
745 handled correctly close the socket and open a new one before sending
746 the second request. The 'single-request-reopen' option in /etc/resolv.conf
747 can be used to select this mode right away, instead of rediscovering the
748 necessity is every process again.
749 Implemented by Ulrich Drepper.
751 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
752 Implemented by Adam Tkac.
754 * Optimized iconv conversions for S390x.
755 Implemented by Andreas Krebbel.
757 * Using condvars with PI mutexes is now more efficient due to kernel
758 support for requeueing to PI futexes. NPTL support added for x86-64.
759 Implemented by Ulrich Drepper.
761 * New locales: ps_AF, my_MM
765 * The following bugs are resolved with this release:
767 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
768 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
769 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
770 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
771 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
773 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
774 Implemented by Ulrich Drepper.
776 * New Linux interfaces: accept4, fallocate, fallocate64.
777 Implemented by Ulrich Drepper.
779 * Correct declarations of string function when used in C++ code. This
780 could lead to compile errors for invalid C++ code.
782 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
785 * New POSIX 2008 interface: psiginfo
786 Implemented by Ulrich Drepper.
788 * New ISO C++1x interfaces: quick_exit, at_quick_exit
789 Implemented by Ulrich Drepper.
791 * Support for selecting between multiple function definitions at runtime
792 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
794 * The libcrypt library can now use the hash function implementations in
795 NSS. Implemented by Ulrich Drepper.
797 * The malloc implementation can be compiled to be less memory efficient
798 but higher performing in multi-threaded programs.
799 Implemented by Ulrich Drepper.
801 * New locales: nan_TW@latin, ks_IN
803 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
804 Implemented by Ulrich Drepper.
806 * Extended printf hook support. It is possible to use user-defined types
807 and extend existing format specifiers.
808 Implemented by Ulrich Drepper.
810 * Handling for group shadow files has been added.
811 Implemented by Ulrich Drepper.
813 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
814 servers (the case, e.g., for some people using the built-in DNS
815 server in ADSL modems/routers). There is a once-per-process timeout
816 in case of a broken server. To avoid it, users can run nscd or put
817 'options single-request' in /etc/resolv.conf.
818 Implemented by Ulrich Drepper.
822 * The following bugs are resolved with this release:
824 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
825 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
826 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
827 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
828 6968, 6974, 6980, 6995, 7008, 7009, 7029
830 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
831 up at the same time. Implemented by Ulrich Drepper.
833 * TLS descriptors for LD and GD on x86 and x86-64.
834 Implemented by Alexandre Oliva.
836 * getaddrinfo now handles DCCP and UDPlite.
837 Implemented by Ulrich Drepper.
839 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
840 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
841 Implemented by Ulrich Drepper.
843 * New implementation of memmem, strstr, and strcasestr which is O(n).
844 Implemented by Eric Blake.
846 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
848 * Implement "e" option for popen to open file descriptor with the
849 close-on-exec flag set. Implemented by Ulrich Drepper.
851 * Implement "b" mode for fmemopen. In this mode writes writes don't
852 implicitly add a NUL byte and seeks from the end of the buffer really
853 use the buffer end, not the string length as the basis.
854 Implemented by Ulrich Drepper.
856 * Many functions, exported and internal, now atomically set the close-on-exec
857 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
859 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
861 Implemented by Pravin Satpute.
863 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
867 * The following bugs are resolved with this release:
869 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
870 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
871 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
872 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
873 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
874 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
875 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
877 * New locales: bo_CN, bo_IN, shs_CA.
879 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
881 * Sorting rules for some Indian languages (Devanagari and Gujarati).
882 Implemented by Pravin Satpute.
884 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
886 * nscd caches now all timeouts for DNS entries
887 Implemented by Ulrich Drepper.
889 * nscd is more efficient and wakes up less often.
890 Implemented by Ulrich Drepper.
892 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
893 vdprintf, and obstack_vprintf.
894 Implemented by Jakub Jelinek.
896 * Faster memset for x86-64.
897 Implemented by Harsha Jagasia and H.J. Lu.
899 * Faster memcpy on x86.
900 Implemented by Ulrich Drepper.
902 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
903 Implemented by Ulrich Drepper.
905 * Faster sqrt and sqrtf implemention for some PPC variants.
906 Implemented by Steven Munroe.
910 * The following bugs are resolved with this release:
912 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
913 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
914 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
915 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
916 5071, 5103, 5104, 5112, 5113, 5184, 5186
918 * More checking functions: fread, fread_unlocked, open*, mq_open.
919 Implemented by Jakub Jelinek and Ulrich Drepper.
921 * Extend fortification to C++. Implemented by Jakub Jelinek.
923 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
924 by not recognizing 'a' as a modifier when those specs are requested.
925 Implemented by Jakub Jelinek.
927 * PPC optimizations to math and string functions.
928 Implemented by Steven Munroe.
930 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
931 options to be passed. Implemented by Ulrich Drepper.
933 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
935 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
936 Implemented by Ulrich Drepper.
938 * Handle private futexes in the NPTL implementation.
939 Implemented by Jakub Jelinek and Ulrich Drepper.
941 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
942 Implemented by Roland McGrath and Ulrich Drepper.
944 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
946 * SHA-256 and SHA-512 based password encryption.
947 Implemented by Ulrich Drepper.
949 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
950 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
953 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
954 Implemented by Ulrich Drepper.
958 * The following bugs are resolved with this release:
960 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
961 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
962 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
963 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
964 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
965 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
966 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
969 * New Linux interfaces: epoll_pwait, sched_getcpu.
971 * New generic interfaces: strerror_l.
973 * nscd can now cache the services database. Implemented by Ulrich Drepper.
977 * The following bugs are resolved with this release:
979 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
980 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
981 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
982 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
983 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
984 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
985 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
986 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
987 3225, 3251, 3252, 3253, 3273
989 * For Linux, the sorting of addresses returned by getaddrinfo now also
990 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
991 Implemented by Ulrich Drepper.
993 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
994 Implemented by Ulrich Drepper.
996 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
998 * New iconv module for MIK. Contributed by Alexander Shopov.
1000 * For sites with broken group and/or passwd database, the auto-propagate
1001 option of nscd can prevent creating ID lookup entries from the results
1002 of a name lookup and vice versa. This usually is no problem but some
1003 site might have problems with the default behavior.
1004 Implemented by Ulrich Drepper.
1006 * Iterating over entire database in NIS can be slow. With the
1007 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1008 to trade time for memory. The entire database will be read at once.
1009 Implemented by Ulrich Drepper.
1011 * The interfaces introduced in RFC 3542 have been implemented by
1014 * Support for the new ELF hash table format was added by Ulrich Drepper.
1016 * Support for priority inheritance mutexes added by Jakub Jelinek and
1019 * Support for priority protected mutexes added by Jakub Jelinek.
1021 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1022 or_IN, csb_PL, fy_NL, sr_ME.
1026 * More overflow detection functions.
1028 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1029 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1031 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1032 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1033 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1034 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1035 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1036 by Masahide Washizawa.
1038 * It is now possible to install audit libraries for the dynamic linker using
1039 LD_AUDIT. Implemented by Ulrich Drepper.
1041 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1042 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1043 For a libc and libpthread that works well on Linux 2.4 kernels, we
1044 recommend using the stable 2.3 branch.
1046 * The new function open_wmemstream acts like open_memstream,
1047 but uses a wchar_t wide character buffer.
1049 * The new function ppoll is an improved version of poll, similar to pselect.
1051 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1052 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1053 renameat, unlinkat, linkat, symlinkat, readlinkat.
1055 * New Linux kernel system calls: unshare,
1056 inotify_init, inotify_add_watch, inotify_rm_watch.
1058 * The euidaccess function is now also known by the alias eaccess,
1059 for compatibility with some other systems.
1061 * Timezone data updated to 2006b version.
1065 * The following bugs are resolved with this release:
1067 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1068 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1069 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1070 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1071 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1072 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1074 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1076 * As of this release, GCC 4 can be used to compile the C Library.
1078 * Timezone data updated to 2005m version.
1082 * The following bugs are resolved with this release:
1084 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1085 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1086 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1087 777, 787, 821, 822, 823, 825
1089 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1093 * Support for RFC 3678. Real implementations exist only for Linux so far.
1094 Implemented by Ulrich Drepper.
1096 * nscd can now cache entries persistently. Expiring entries are reloaded.
1097 For speedups the cache can be shared in memory with client processes.
1098 Implemented by Ulrich Drepper.
1100 * nscd can now perform SELinux checks.
1101 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1103 * getaddrinfo queries are now cached. Canonical name lookup is performed
1105 Implemented by Ulrich Drepper.
1107 * The nothrow function attribute is used when headers are used by gcc when
1108 compiling C code. This can avoid significant amounts of exception
1111 * The malloc functions perform more error checking and are stricter when
1112 it comes to reacting on errors. The default action is to terminate
1113 the process after showing an error message. Implemented by Ulrich Drepper.
1115 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1116 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1118 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1119 namespaces using the new function dlmopen(). This feature is of course,
1120 like most other dynamic loading functionality, not available in statically
1121 linked applications. Implemented by Ulrich Drepper.
1123 * Low-overhead boundary checking variants of string and some stdio functions
1124 were added. These are to be used in conjunction with a gcc patch by
1125 Jakub Jelinek which adds calls to these functions if possible.
1126 Implemented by Jakub Jelinek and Ulrich Drepper.
1128 * Old code for several operating systems and machine architectures that
1129 have not been in working condition in a long time have been removed from
1130 the main source tree maintained by the GNU C Library's maintainers.
1131 These files are now reside in the separate `ports' source module
1132 that is usable as an add-on when building the library.
1136 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1137 interrogate the dynamic linker, compatible with the Solaris interface.
1139 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1140 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1142 * getifaddrs now uses the netlink interface on Linux to get its information.
1143 Implemented by Thorsten Kukuk.
1145 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1146 Implemented by Ulrich Drepper.
1148 * support for non-executable stacks on x86 has been added. Changes mostly
1151 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1154 * getaddrinfo now performs destination address selection according to
1159 * Thread-safe interfaces for many functions that access locale data
1160 were added in version 2.3, but these features were omitted from NEWS.
1161 Many functions have variants with an `_l' suffix that take a `locale_t'
1162 object as a parameter rather than consulting the current locale.
1163 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1164 create and maintain `locale_t' objects. Additionally, the new function
1165 `uselocale' sets "the current locale" (as used by functions not so
1166 parameterized) set for an individual thread. These features were added
1167 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1169 * The functions getresuid, getresgid, setresuid, and setresgid, which
1170 have long been available on Linux, are now declared in <unistd.h>
1171 and are now also available on the Hurd.
1173 * ELF thread-local storage support (TLS) now works on x86-64.
1175 * The new dynamic string token $LIB is expanded in shared library names.
1176 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1178 * Aldy Hernandez contributed complete software floating point support for
1179 PowerPC machines with no FPU.
1181 * fexecve is implemented on Linux.
1183 * The `btowc' function should work at least twice as fast due to
1184 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1186 * With approriate thread add-ons cancelable functions are now implemented
1187 in libc.so as well. No need to call the function in libpthread. This
1188 change allowed to finally disable the incorrect and expensive handling
1189 of weak definition in ld.so.
1191 * Yet more PLT entries in libc.so have been removed. We finally arrived
1192 at the bare minimum. Startup times improved appropriately.
1194 * Support for the new Linux/x86 system call interface was added. The
1195 AT_SYSINFO auxiliary vector entry is recognized and handled.
1199 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1202 * iconv (the program and the interface) now accepts empty names (excluding
1203 options like //TRANSLIT) to mean "use charset of current locale".
1205 * localedef can now transliterate characters in strings which are not in
1206 the provided charmap. The information from the input locale is used.
1208 * Prelinking support was added for ELF targets. This requires additional
1209 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1211 * Read-only stdio streams now use mmap to speed up operation by eliminating
1212 copying and buffer underflows. To use add 'm' to the mode string of
1213 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1215 * The malloc functions were completely rewritten by Wolfram Gloger based
1216 on Doug Lea's malloc-2.7.0.c.
1218 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1219 implementation of regex.
1221 * Bruno Haible upgraded the iconv and locale implementation to support
1224 * Contents of the LC_* and LANG environment variables in the CEN style are
1225 not recognized anymore. It never was used. Change by Ulrich Drepper.
1227 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1228 thread-local storage (TLS) ABI on some platforms.
1229 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1231 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1232 EUC-JISX0213, and TSCII.
1234 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1235 BSD-compatible interface for getting all network interface addresses.
1236 Implementation for IPv4 by Roland McGrath.
1238 * Loading of locale data is faster due to the introduction of a locale
1239 archive. Implemented by Roland McGrath and Ulrich Drepper.
1241 * Startup times are significantly reduced by not using exported functions
1242 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1245 * Steven Munroe contributed a port to PowerPC64/Linux.
1249 * The Hurd now uses the GNU libio implementation of stdio rather than the
1250 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1252 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1253 with the same behavior as the Linux system call of the same name.
1257 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1258 128-bit long double format.
1260 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1261 IBM1161, and IBM1162 charsets.
1263 * Andreas Jaeger contributed a port to x86-64/Linux.
1265 * Peter Bruin contributed a port to PowerPC/Hurd.
1267 * libc functions using I/O streams now can handle wide-oriented streams
1270 * optimizations in the dynamic linker. Binaries created by recent binutils
1271 versions start up quicker due to reduced time spent on relocations.
1273 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1277 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1278 asinh, atanh, j0 for the 128-bit long double format.
1280 * Bruno Haible updated all the code handling Unicode in some form to
1281 support Unicode 3.1.
1283 * Speed of regex for single-byte locales is back to previous levels.
1284 Patch by Isamu Hasegawa.
1286 * Alpha, SPARC, and IA-64 now also using floating stacks.
1288 * Startup time of internationalized applications greatly improved through
1289 iconv cache. Use iconvconfig to generate the cache file.
1290 Contributed by Ulrich Drepper.
1292 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1293 severe performance problems. Patch by David Mosberger.
1295 * The Hurd port got a lot more functionality like AIO, various stdio
1296 extensions, etc. Mainly done by Roland McGrath.
1298 * mtrace can now lookup symbols in shared libraries.
1302 * Intel's IA-64 math library is largely integrated. It provides fast and
1303 accurate implementatations for most basic and standard math functions
1304 in float, double, and long double format.
1306 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1307 and asin for the 96-bit long double format and asin, log, tan for the
1308 128-bit long double format.
1310 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1311 The basic double functions exist today. Contributed by Abraham Ziv
1312 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1313 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1315 * An asynchronous name lookup library was added. The interface is designed
1316 after POSIX AIO. The proposal was circulated beforehand to get comments.
1317 No negative ones came in. Implemented by Ulrich Drepper.
1319 * Port to S390/64bit contributed by Martin Schwidefsky
1320 <schwidefsky@de.ibm.com>.
1322 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1323 of functions for Linux/IA-64.
1325 * The RPC code is now thread safe. Threads can now use the same service
1326 of different services at the same time. Patch by Eric Norum
1327 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1329 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1330 family of functions for Linux/S390.
1332 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1333 of functions for Linux/x86.
1335 * Port to Linux/CRIS contributed by Axis Communications.
1339 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1340 we can now check for namespace violations and missing declarations. The
1341 result is that almost all headers are now Unix-compliant (as defined in
1342 the upcoming XPG6). The negative side is that some programs might need
1343 corrections, too, if they depend on the incorrect form of the headers in
1344 previous versions which defined too many symbols and included too many
1347 * regex now handles multibyte character sets correctly.
1348 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1350 * iconv (the program) does now conform to the upcoming XPG6 and handles
1351 charmaps. Instead of the charset names the path of charmaps can be
1352 provided and the conversion happens based on this data.
1353 Contributed by Ulrich Drepper.
1355 * The locale program now provides detailed information about the installed
1360 only lists the names of the supported locales
1364 provides details such as country, language, and codeset name.
1365 Contributed by Ulrich Drepper.
1369 * The gencat program now parses the input file according to the charset
1370 selected by the LC_CTYPE category. This is important for stateful
1371 character sets. To make generating catalogs easier there is a way
1372 to overwrite the charset selected by the locale: before the first
1373 message or $ quote line the catalog can contain a line like
1375 $ codeset=ISO-8859-2
1377 to select the charset (ISO-8859-2 in this case).
1379 Implemented by Shinya Hanataka and Ulrich Drepper.
1381 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1382 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1383 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1385 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1386 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1388 * The LANGUAGE environment variable is now ignored unless the locale is
1389 changed from the default "C" locale.
1391 * The usual bug fixes.
1395 * Greg McGary added runtime support for bounds checking using gcc's
1396 new -fbounded-pointers option. ix86 target is complete. PowerPC
1399 * Thorsten Kukuk added secure mode support to nscd.
1401 * The Berkeley db libraries have been removed.
1403 Related, the nss_db module is now in a separate package since it
1404 obviously requires a database library being available.
1406 * Wide character I/O streams implemented by Ulrich Drepper.
1408 * Functions from the extended socket API added by Ulrich Drepper.
1410 * Functions feenableexcept and fedisableexcept to control the
1411 behaviour of individual exceptions have been added by Andreas Jaeger.
1413 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1415 * The resolver code has been updated from bind 8.2.3-T5B which supports
1416 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1419 This change could in some situations effect backward compatibility. Since
1420 now `_res' is a thread-local instead of a global variable, modifying it
1421 in one thread does not have any effect in other threads.
1423 The resolver library was also extended to allow IPv6 as the transport
1424 protocol for the requests. This work was done by Stig Venaas.
1426 * Compatibility code for K&R C compilers has been removed from the
1427 header files. A ISO C compiler is needed to use the library
1428 (conforming to either C89 or C99 standard).
1430 * Complete rewrite of the localedef program to support multibyte character
1431 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1432 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1433 Implemented by Ulrich Drepper.
1435 Bruno Haible significantly improved the generation and use of the data
1436 structures for the wide character tables.
1438 * Plural handling in gettext implemented by Ulrich Drepper.
1440 * The utmp daemon has been removed.
1442 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1444 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1447 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1449 * POSIX barriers implemented by Kaz Kylheku.
1451 * POSIX spawn function family implemented by Ulrich Drepper.
1453 * POSIX spinlocks are now available.
1455 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1457 * the configure option --enable-kernel=X.Y.Z allows to strip out
1458 compatibility for kernel versions before X.Y.Z. This is currently only
1459 implemented for Linux.
1461 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1462 field sin6_scope_id. This means that all programs using IPv6 should be
1463 recompiled. Don't expect binary compatibility with previous glibc
1466 * various conversion modules for IBM character sets contributed by
1469 * IA-64 port by Jes Sorensen and HJ Lu.
1483 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1485 * New xdr functions are added; some rpc functions are now 64bit clean.
1487 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1489 * Fixed known incompatibilities with glibc 2.0.
1491 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1493 * Optimized a number of functions (especially the ELF dynamic loader).
1495 * Update timezone data files.
1497 * lots of charmaps corrections
1499 * some new locale definitions and charmaps
1504 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1505 conform to POSIX member type requirements. Symbol versions have been
1506 adjusted as needed within the library, and for direct use by applications,
1507 but there is potential for problems if third-party libraries use
1508 struct timeval as part of their interface. This does not present
1509 a problem for X and other "essential" system libraries.
1511 * An additional locale model to support C++ Standard Library locale
1512 model and probably more was implemented by Ulrich Drepper.
1514 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1517 * Miles Bader provided the `argp' function family to support hierachical
1518 command line argument parsing, layered on top of getopt.
1520 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1522 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1525 * scanf recognizes the %a and %A format for scanning floating point numbers.
1527 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1528 information and interfaces for the available integer types.
1530 * about 130 new math functions were added to implement the ISO C9x math
1533 * the new header <complex.h> contains definitions of the complex math
1534 functions from ISO C 9X.
1536 * the new header <tgmath.h> defines generic macros to use complex or
1537 real valued functions.
1539 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1541 * Andreas Jaeger provided a test suite for the math library.
1543 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1545 * Ulrich Drepper added character set conversion functions (iconv).
1547 * Optimized string functions have been added.
1549 * The localedata addon is now part of glibc.
1551 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1553 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1554 daemon for NSS (nscd).
1556 Missing a better place here are some numbers on improvements. Under
1557 Linux 2.1.125 un-tar-ing the kernel sources takes
1561 using local files 12.19s 6.88s 22.91s
1563 using NIS 13.92s 8.91s 26.34s
1565 using NIS & nscd 10.37s 7.34s 25.30s
1567 using NIS+ 27.57s 30.37s 640.46s
1569 using NIS+ & nscd 10.25s 7.83s 26.51s
1571 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1573 Keep in mind that non-namelookup related operations dominate above times.
1574 It was just a common complain that using NIS+ unpacking the kernel is
1577 [1] The old nscd implementation is not available anymore since it was
1578 distributed with glibc up to version 2.0.98 and thus is now replaced.
1580 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1582 * Mark Kettenis provided a Hesiod NSS module.
1584 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1585 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1587 * rcmd can now handle netgroups (Dick Streefland).
1589 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1592 * Support for the IPv6 protocol has been added to the socket API, as per the
1593 latest draft standards.
1595 * Support for Linux 2.2 has been added.
1597 * Interface changes relative to the latest 2.0.x release:
1598 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1599 addseverity NEW: Unix98
1600 alphasort64 NEW: LFS
1601 argp_err_exit_status NEW: argp, GNU ext
1602 argp_error NEW: argp, GNU ext
1603 argp_failure NEW: argp, GNU ext
1604 argp_help NEW: argp, GNU ext
1605 argp_parse NEW: argp, GNU ext
1606 argp_program_bug_address NEW: argp, GNU ext
1607 argp_program_version NEW: argp, GNU ext
1608 argp_program_version_hook NEW: argp, GNU ext
1609 argp_state_help NEW: argp, GNU ext
1610 argp_usage NEW: argp, GNU ext
1611 authdes_create NEW: Secure RPC
1612 authdes_getucred NEW: Secure RPC
1613 authdes_pk_create NEW: Secure RPC
1614 backtrace NEW: GNU ext.
1615 backtrace_symbols NEW: GNU ext.
1616 backtrace_symbols_fd NEW: GNU ext.
1618 cacosf NEW: ISO C 9x
1619 cacosh NEW: ISO C 9x
1620 cacoshf NEW: ISO C 9x
1621 cacoshl NEW: ISO C 9x
1622 cacosl NEW: ISO C 9x
1629 casinf NEW: ISO C 9x
1630 casinh NEW: ISO C 9x
1631 casinhf NEW: ISO C 9x
1632 casinhl NEW: ISO C 9x
1633 casinl NEW: ISO C 9x
1635 catanf NEW: ISO C 9x
1636 catanh NEW: ISO C 9x
1637 catanhf NEW: ISO C 9x
1638 catanhl NEW: ISO C 9x
1639 catanl NEW: ISO C 9x
1640 cbc_crypt NEW: Secure RPC
1644 ccoshf NEW: ISO C 9x
1645 ccoshl NEW: ISO C 9x
1651 cimagf NEW: ISO C 9x
1652 cimagl NEW: ISO C 9x
1653 clearerr_locked REMOVED
1654 clntunix_create NEW: sunrpc ext
1656 clog10 NEW: ISO C 9x
1657 clog10f NEW: ISO C 9x
1658 clog10l NEW: ISO C 9x
1668 cprojf NEW: ISO C 9x
1669 cprojl NEW: ISO C 9x
1671 crealf NEW: ISO C 9x
1672 creall NEW: ISO C 9x
1677 csinhf NEW: ISO C 9x
1678 csinhl NEW: ISO C 9x
1681 csqrtf NEW: ISO C 9x
1682 csqrtl NEW: ISO C 9x
1686 ctanhf NEW: ISO C 9x
1687 ctanhl NEW: ISO C 9x
1689 des_setparity NEW: Secure RPC
1690 ecb_crypt NEW: Secure RPC
1691 endutxent NEW: Unix98
1693 exp10f NEW: ISO C 9x
1694 exp10l NEW: ISO C 9x
1698 fattach NEW: STREAMS
1699 fdetach NEW: STREAMS
1703 feclearexcept NEW: ISO C 9x
1704 fegetenv NEW: ISO C 9x
1705 fegetexceptflag NEW: ISO C 9x
1706 fegetround NEW: ISO C 9x
1707 feholdexcept NEW: ISO C 9x
1709 feraiseexcept NEW: ISO C 9x
1710 ferror_locked REMOVED
1711 fesetenv NEW: ISO C 9x
1712 fesetexceptflag NEW: ISO C 9x
1713 fesetround NEW: ISO C 9x
1714 fetestexcept NEW: ISO C 9x
1715 feupdateenv NEW: ISO C 9x
1716 fflush_locked REMOVED
1720 fgets_unlocked NEW: GNU ext.
1721 fileno_locked REMOVED
1733 fputc_locked REMOVED
1734 fputs_unlocked NEW: GNU ext.
1735 fread_unlocked NEW: GNU ext.
1740 fstatvfs NEW: Unix98
1744 ftruncate64 NEW: LFS
1746 fwrite_unlocked NEW: GNU ext.
1747 gai_strerror NEW: IPv6
1751 getchar_locked REMOVED
1753 getdate_err NEW: Unix98
1754 getdate_r NEW: GNU ext.
1756 getnameinfo NEW: IPv6
1757 getnetname NEW: Secure RPC
1758 getpmsg NEW: STREAMS
1759 getpt NEW: Unix98 PTY
1760 getrlimit64 NEW: LFS
1761 getutxent NEW: Unix98
1762 getutxid NEW: Unix98
1763 getutxline NEW: Unix98
1764 glob64 NEW: GNU ext.
1765 globfree64 NEW: GNU ext.
1766 gnu_get_libc_release NEW: GNU ext.
1767 gnu_get_libc_version NEW: GNU ext.
1768 grantpt NEW: Unix98 PTY
1769 host2netname NEW: Secure RPC
1771 iconv_close NEW: iconv
1772 iconv_open NEW: iconv
1773 if_freenameindex NEW: IPv6
1774 if_indextoname NEW: IPv6
1775 if_nameindex NEW: IPv6
1776 if_nametoindex NEW: IPv6
1777 in6addr_any NEW: IPv6
1778 in6addr_loopback NEW: IPv6
1779 inet6_isipv4mapped NEW: IPv6
1780 isastream NEW: STREAMS
1781 iswblank NEW: GNU ext.
1782 key_decryptsession NEW: Secure RPC
1783 key_decryptsession_pk NEW: Secure RPC
1784 key_encryptsession NEW: Secure RPC
1785 key_encryptsession_pk NEW: Secure RPC
1786 key_gendes NEW: Secure RPC
1787 key_get_conv NEW: Secure RPC
1788 key_secretkey_is_set NEW: Secure RPC
1789 key_setnet NEW: Secure RPC
1790 key_setsecret NEW: Secure RPC
1791 llrint NEW: ISO C 9x
1792 llrintf NEW: ISO C 9x
1793 llrintl NEW: ISO C 9x
1794 llround NEW: ISO C 9x
1795 llroundf NEW: ISO C 9x
1796 llroundl NEW: ISO C 9x
1801 lrintf NEW: ISO C 9x
1802 lrintl NEW: ISO C 9x
1803 lround NEW: ISO C 9x
1804 lroundf NEW: ISO C 9x
1805 lroundl NEW: ISO C 9x
1807 makecontext NEW: Unix98
1808 mempcpy NEW: GNU ext.
1811 modify_ldt NEW: kernel
1815 nearbyint NEW: ISO C 9x
1816 nearbyintf NEW: ISO C 9x
1817 nearbyintl NEW: ISO C 9x
1818 netname2host NEW: Secure RPC
1819 netname2user NEW: Secure RPC
1820 nexttoward NEW: ISO C 9x
1821 nexttowardf NEW: ISO C 9x
1822 nexttowardl NEW: ISO C 9x
1826 passwd2des NEW: Secure RPC
1828 pow10f NEW: GNU ext.
1829 pow10l NEW: GNU ext.
1832 printf_size NEW: GNU ext.
1833 printf_size_info NEW: GNU ext.
1834 profil_counter REMOVED
1835 pthread_mutexattr_getkind_np REPLACED
1836 pthread_mutexattr_setkind_np REPLACED
1837 ptsname NEW: Unix98 PTY
1838 ptsname_r NEW: Unix98 PTY
1840 putchar_locked REMOVED
1841 putgrent NEW: GNU ext.
1843 putpmsg NEW: STREAMS
1844 pututxline NEW: Unix98
1848 readdir64_r NEW: LFS
1849 remquo NEW: ISO C 9x
1850 remquof NEW: ISO C 9x
1851 remquol NEW: ISO C 9x
1853 roundf NEW: ISO C 9x
1854 roundl NEW: ISO C 9x
1856 scalbln NEW: ISO C 9x
1857 scalblnf NEW: ISO C 9x
1858 scalblnl NEW: ISO C 9x
1860 sendfile NEW: kernel
1861 setcontext NEW: Unix98
1862 setrlimit64 NEW: LFS
1863 setutxent NEW: Unix98
1865 sigignore NEW: Unix98
1866 sigqueue NEW: POSIX.1b
1867 sigrelse NEW: Unix98
1868 sigset NEW: POSIX.1b
1869 sigtimedwait NEW: POSIX.1b
1870 sigwaitinfo NEW: POSIX.1b
1871 sincos NEW: GNU ext.
1872 sincosf NEW: GNU ext.
1873 sincosl NEW: GNU ext.
1877 strcasestr NEW: GNU ext.
1878 strtoimax NEW: ISO C 9x
1879 strtoumax NEW: ISO C 9x
1880 strverscmp NEW: GNU ext.
1881 svcauthdes_stats NEW: Secure RPC
1882 svcunix_create NEW: sunrpc etx
1883 svcunixfd_create NEW: sunrpc ext
1884 swapcontext NEW: Unix98
1885 tcgetsid NEW: Unix98 PTY
1886 tdestroy NEW: GNU ext.
1887 tgamma NEW: ISO C 9x
1888 tgammaf NEW: ISO C 9x
1889 tgammal NEW: ISO C 9x
1893 truncf NEW: ISO C 9x
1894 truncl NEW: ISO C 9x
1896 unlockpt NEW: Unix98 PTY
1897 updwtmpx NEW: Unix98
1898 user2netname NEW: Secure RPC
1899 utmpxname NEW: Unix98
1900 versionsort NEW: GNU ext.
1901 versionsort64 NEW: GNU ext.
1903 wcscasecmp NEW: GNU ext.
1904 wcsncasecmp NEW: GNU ext.
1905 wcsnlen NEW: GNU ext.
1906 wcstoimax NEW: ISO C 9x
1907 wcstoll NEW: ISO C 9x
1908 wcstoull NEW: ISO C 9x
1909 wcstoumax NEW: ISO C 9x
1911 wordexp NEW: POSIX.2
1912 wordfree NEW: POSIX.2
1913 write_profiling REMOVED
1914 xdecrypt NEW: Secure RPC
1915 xdr_authdes_cred NEW: Secure RPC
1916 xdr_authdes_verf NEW: Secure RPC
1917 xdr_cryptkeyarg NEW: Secure RPC
1918 xdr_cryptkeyarg2 NEW: Secure RPC
1919 xdr_cryptkeyres NEW: Secure RPC
1920 xdr_getcredres NEW: Secure RPC
1921 xdr_key_netstarg NEW: Secure RPC
1922 xdr_key_netstres NEW: Secure RPC
1923 xdr_keybuf NEW: Secure RPC
1924 xdr_keystatus NEW: Secure RPC
1925 xdr_netnamestr NEW: Secure RPC
1926 xdr_sizeof NEW: Secure RPC
1927 xdr_unixcred NEW: sunrpc ext
1928 xencrypt NEW: Secure RPC
1929 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1940 * inet_ntoa is thread-safe
1942 * updwtmp is moved from libutil to libc
1944 * rewrite of cbrt function
1946 * update of timezone data
1960 * add atoll function
1962 * fix complex problems in Berkeley DB code
1964 * fix math functions
1968 * fixed lots of header problems (especially Linux/GNU specific)
1970 * dynamic loader preserves all registers
1972 * Roland McGrath provided support for handling of auxiliary objects in
1973 the ELF dynamic loader.
1975 * support for parallel builds is improved
1979 * GNU extensions are no longer declared by default. To enable them you
1980 must define the macro `_GNU_SOURCE' in your program or compile with
1983 * The library has changed from using GNU ld symbol aliases to using weak
1984 symbols where available. The ELF object file format supports weak
1985 symbols; GNU ld also supports weak symbols in the a.out format. (There
1986 is also now support for other GNU ld extensions in ELF. Use the
1987 `--with-elf' option to configure to indicate you have ELF, and
1988 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1989 of many files which contained only symbol aliases, reducing the size of
1990 the source and the compiled library; many other files were renamed to
1991 less cryptic names previously occupied by the symbol alias files.
1992 There is a new header file <elf.h> for programs which operate on
1993 files in the ELF format.
1995 * Converted to Autoconf version 2, so `configure' has more options.
1996 Run `configure --help' to see the details.
1998 * The library can now be configured to build profiling, highly-optimized
1999 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2000 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2001 `configure' enable building these extra libraries. The shared library is
2002 built by default when using both ELF and GNU ld. When shared libraries
2003 are enabled, the new library `-ldl' is available for arbitrary run-time
2004 loading of shared objects; its interface is defined in <dlfcn.h>. The
2005 new header file <link.h> gives access to the internals of the run-time
2006 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2007 application of same name on other systems and it provides information
2008 about dynamically linked binaries.
2010 * The C library now provides the run-time support code for profiling
2011 executables compiled with `-pg'. Programs can control the profiling code
2012 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2013 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2014 the support for this file format was contributed by David Mosberger-Tang.
2016 * The math code has been replaced with a math library based on fdlibm from
2017 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2018 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2019 functions. The math functions now reside in a separate library, so
2020 programs using them will need to use `-lm' their linking commands.
2022 * John C. Bowman contributed optimized ix87 assembler inline functions.
2024 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2025 mechanism similar to that found in Solaris 2. This is now used for the
2026 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2027 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2028 file controls what services are used for each individual database. This
2029 works by loading shared libraries with names specified in `nsswitch.conf',
2030 so service modules can be changed or added at any time without even
2031 relinking any program. Currently there are the file, db, and NIS based
2032 NSS services available.
2034 * The new functions `strtoq' and `strtouq' parse integer values from
2035 strings, like `strtol' and `strtoul', but they return `long long int' and
2036 `unsigned long long int' values, respectively (64-bit quantities).
2038 * The new functions `strtof' and `strtold' parse floating-point values from
2039 strings, like `strtod', but they return `float' and `long double' values,
2040 respectively (on some machines `double' and `long double' are the same).
2042 * Ulrich Drepper has contributed new implementations of the floating-point
2043 printing and reading code used in the `printf' family of functions and
2044 `strtod', `strtof', and `strtold'. These new functions are perfectly
2045 accurate, and much faster than the old ones.
2047 * The implementation of the POSIX locale model was completely rewritten by
2048 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2049 to compile the POSIX locale definition.
2051 * The former dummy implementations of the strcoll and strxfrm function are
2052 now replaced by fully functional code contributed by Ulrich Drepper. The
2053 collation information comes from the POSIX locale definitions.
2055 * The new header <langinfo.h> defines an interface for accessing
2056 various locale-dependent data (using the locale chosen with `setlocale').
2058 * Ulrich Drepper has contributed a new suite of functions for operation on
2059 wide-character and multibyte-character strings, in <wchar.h>;
2060 and classification and case conversion of wide characters, in <wctype.h>.
2061 These new functions are conforming to the ISO C, Amendement 1 specification.
2063 * There is now a second implementation of the standard I/O library available.
2064 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2065 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2067 * You can now use positional parameter specifications in format strings
2068 for the `printf' and `scanf' families of functions. For example,
2069 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2070 ``Number 6, Mr Jones''. This is mainly useful when providing different
2071 format strings for different languages, whose grammars may dictate
2072 different orderings of the values being printed. To support this
2073 feature, the interface for `register_printf_handler' has changed; see
2074 the header file <printf.h> for details.
2076 * The `printf' and `scanf' families of functions now understand a new
2077 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2078 to group numbers as indicated by the locale; for `scanf' and friends, this
2079 says to accept as valid only a number with all the proper grouping
2080 separators in the right places. In the default "C" locale, numbers are
2081 not grouped; but locales for specific countries will define the usual
2082 conventions (i.e. separate thousands with `,' in the US locale).
2084 * The pgrp functions have been regularized, slightly incompatibly but much
2085 less confusingly. The core functions are now `getpgid' and `setpgid',
2086 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2087 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2088 provided for compatibility. There is no longer an incompatible `getpgrp'
2089 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2091 * The new header file <fts.h> and suite of functions simplify programs that
2092 operate on directory trees. This code comes from 4.4 BSD.
2094 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2095 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2096 NSS scheme used in glibc.
2098 * There is a new malloc debugging hook `__memalign_hook'.
2100 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2101 `unsigned int' in <sys/types.h>. These are for compatibility only and
2102 their use is discouraged.
2104 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2105 done differently, so that it works even without GNU ld.
2107 * New function `euidaccess' checks allowed access to a file like `access',
2108 but using the effective IDs instead of the real IDs.
2110 * The time zone data files have been updated for the latest and greatest
2111 local time conventions of the countries of the world.
2113 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2116 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2117 for formatting floating-point numbers. They are provided only for
2118 compatibility; new programs should use `sprintf' instead. There are
2119 also equivalent function for the `long double' floating-point type and
2120 all functions also exist in a reentrant form.
2122 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2123 functions for maintaining the login-record files (primarily of use to
2124 system programs such as `login'), and convenient functions for
2125 allocating and initializing a pseudo-terminal (pty) device.
2127 * Ulrich Drepper has contributed new support for System V style
2128 shared memory and IPC on systems that support it.
2130 * Ulrich Drepper has contributed several miscellaneous new functions found
2131 in System V: The `hsearch' family of functions provide an effective
2132 implementation of hash tables; `a64l' and `l64a' provide a very simple
2133 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2136 * Ulrich Drepper has contributed new reentrant counterparts for the
2137 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2139 * Ulrich Drepper has contributed new, highly-optimized versions of several
2140 string functions for the i486/Pentium family of processors.
2142 * Ulrich Drepper has updated the Linux-specific code, based largely
2143 on work done in Hongjiu Lu's version of GNU libc for Linux.
2144 The GNU library now supports Linux versions 2.0.10 and later,
2145 using the ELF object file format (i[3456]86-*-linux).
2147 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2149 * David Mosberger-Tang and Richard Henderson have ported the C library
2150 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2151 dynamic linking support for ELF/Alpha.
2153 * Richard Henderson contributed several Alpha optimized assembler function
2154 for arithmetic and string handling.
2156 * Ulrich Drepper has contributed a new set of message catalog functions to
2157 support multiple languages using the <libintl.h> interface, for use with
2158 his new package GNU gettext. Translation volunteers have contributed
2159 catalogs of the library's messages in Spanish, German, and Korean.
2161 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2162 program and the `catgets' function for reading the catalog files it
2163 creates. (The <libintl.h> interface is preferred; we include the
2164 <nl_types.h> interface using `catgets' only for source compatibility with
2165 programs already written to use it.)
2167 * New header file <values.h> gives SVID-compatible names for <limits.h>
2170 * Various new macros, declarations, and small header files for compatibility
2173 * New function `group_member' is a convenient way to check if a process has
2174 a given effective group ID.
2176 * When using GCC 2.7 and later, the socket functions are now declared in a
2177 special way so that passing an argument of type `struct sockaddr_in *',
2178 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2179 `struct sockaddr *' type, does not generate a type-clash warning.
2181 * New function `error' declared in header file <error.h> is a convenient
2182 function for printing error messages and optionally exiting; this is the
2183 canonical function used in GNU programs. The new functions `err', `warn',
2184 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2185 doing the same thing.
2187 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2188 POSIX.2 `glob' function to do ~ and {...} expansion.
2190 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2191 `clearenv' which is used in POSIX.9 is also available.
2193 * New function `getsid' returns session ID number on systems that support it.
2195 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2196 files <db.h> and <mpool.h> provide a rich set of functions for several
2197 types of simple databases stored in memory and in files, and <ndbm.h> is
2198 an old `ndbm'-compatible interface using the `db' functions. Link with
2199 `-ldb' to get these functions.
2201 * New macro `strdupa' copies a string like `strdup', but uses local stack
2202 space from `alloca' instead of dynamic heap space from `malloc'.
2204 * New function `strnlen' is like `strlen' but searches only a given maximum
2205 number of characters for the null terminator. `stpncpy', `strndup' and
2206 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2209 * New function `statfs' in header <sys/statfs.h>.
2211 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2212 provide convenient functions for operating on blocks of null-terminated
2215 * A new suite of functions in <utmp.h> handle all the details of reading
2216 and writing the utmp file.
2218 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2221 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2222 completely POSIX compliant and also implemented the extended functionality
2223 to handle alternate digit representation and alternate era date formats.
2225 * Ulrich Drepper provided an implementation of the `strptime' function
2226 defined in XPG4.2 which transforms a string into a `struct tm' value.
2228 * Paul Eggert provided the tzselect shell script as part of the timezone
2229 code. The shell script makes it easy to select the correct timezone
2232 * The implementation of the malloc family of functions is completely replaced
2233 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2234 The implementation uses the mmap function (if available) and it is
2235 optimized for the use in multi threaded programs.
2237 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2238 functions. This new functionality is usable by specifying a special
2239 salt string and it is compatible with implementation on *BSD systems.
2241 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2242 `getsubopt' to handle second level command line options, `bsd_signal'
2243 to access BSD style `signal' functionality, the obsolete `regexp' style
2246 * the `lchown' function is available on system which support this
2249 * The implementation of the shadow password handling function was contributed
2252 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2254 * POSIX.1g support was added. The <sys/select.h> header is available,
2255 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2256 implementation of `getaddrinfo'.
2260 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2262 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2263 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2265 * The new function `daemon' from 4.4 BSD is useful for server programs that
2266 want to put themselves in the background.
2268 * Joel Sherrill has contributed support for several standalone boards that
2269 run without an operating system.
2271 * `printf', `scanf' and friends now accept a `q' type modifier for long
2272 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2274 * All of the code taken from BSD (notably most of the math and networking
2275 routines) has been updated from the BSD 4.4-Lite release.
2277 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2279 * The new functions `getdomainname' and `setdomainname' fetch or change the
2280 YP/NIS domain name. These are system calls which exist on systems which
2283 * The time zone data files have been updated for the latest international
2286 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2287 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2291 * The C library now includes support for Sun RPC, from Sun's free
2292 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2293 are included. (There is still no support for YP.)
2295 * Tom Quinn has contributed a port of the C library to SGI machines running
2296 Irix 4 (mips-sgi-irix4).
2298 * The new `lockf' function is a simplified interface to the locking
2299 facilities of `fcntl', included for compatibility.
2301 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2303 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2305 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2308 * The error message printed by `assert' for a failed assertion now includes
2309 the name of the program (if using GNU ld) and the name of the calling
2310 function (with versions of GCC that support this).
2312 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2314 * The library now includes the <sys/mman.h> header file and memory
2315 management functions `mmap', `munmap', `mprotect', `msync', and
2316 `madvise', on systems that support those facilities.
2318 * The interface for `mcheck' has changed slightly: the function called to
2319 abort the program when an allocation inconsistency is detected now takes
2320 an argument that indicates the type of failure. The new function
2321 `mprobe' lets you request a consistency check for a particular block at
2322 any time (checks are normally done only when you call `free' or `realloc'
2325 * It is now possible to easily cross-compile the C library, building on one
2326 system a library to run on another machine and/or operating system. All
2327 you need to do is set the variable `HOST_CC' in `configparms' to the
2328 native compiler for programs to run on the machine you are building on (a
2329 few generator programs are used on Unix systems); set `CC' to the
2332 * The new function `fexecve' (only implemented on the GNU system) executes
2333 a program file given a file descriptor already open on the file.
2337 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2338 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2340 * You can set the variable `libprefix' in `configparms' to specify a prefix
2341 to be prepended to installed library files; this makes it easy to install
2342 the GNU C library to be linked as `-lgnuc' or whatever.
2344 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2345 copies a limited number of characters from a string, and returns the
2346 address of the last character written.
2348 * You no longer need to check for whether the installed `stddef.h' is
2349 compatible with the GNU C library. configure now checks for you.
2351 * You can now define a per-stream `fileno' function to convert the
2352 stream's cookie into an integral file descriptor.
2354 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2355 allocates zero bytes of storage, and returns a unique pointer which
2356 you can pass to `realloc' or `free'. The behavior is undefined if
2357 you dereference this pointer.
2359 * The C library now runs on Sony NEWS m68k machines running either
2360 NewsOS 3 or NewsOS 4.
2362 * The new `syscall' function is a system-dependent primitive function
2363 for invoking system calls. It has the canonical behavior on Unix
2364 systems, including unreliable return values for some calls (such as
2365 `pipe', `fork' and `getppid').
2367 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2368 to `EAGAIN', which is the preferred name. On systems whose kernels
2369 use two distinct codes, the C library now translates EWOULDBLOCK to
2370 EAGAIN in every system call function.
2374 * The GNU C Library Reference Manual is now distributed with the library.
2375 `make dvi' will produce a DVI file of the printed manual.
2376 `make info' will produce Info files that you can read on line using C-h i
2377 in Emacs or the `info' program.
2378 Please send comments on the manual to bug-glibc-manual@gnu.org.
2380 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2382 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2384 * Jason Merrill has contributed a port to the Sequent Symmetry running
2385 Dynix version 3 (i386-sequent-dynix).
2387 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2388 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2390 * New function `memory_warnings' lets you arrange to get warnings when
2391 malloc is running out of memory to allocate, like Emacs gives you.
2393 * The C library now contains the relocating allocator used in Emacs 19 for
2394 its editing buffers. This allocator (ralloc) minimizes allocation
2395 overhead and fragmentation by moving allocated regions around whenever it
2396 needs to. You always refer to a ralloc'd region with a "handle" (a
2397 pointer to a pointer--an object of type `void **').
2399 * There is a new `printf' format: `%m' gives you the string corresponding
2400 to the error code in `errno'.
2402 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2403 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2404 pass, the `a' modifier says to fill in a `char **' you pass with a
2407 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2408 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2409 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2411 * `mkstemp' is a traditional Unix function to atomically create and open a
2412 uniquely-named temporary file.
2416 * The standard location for the file that says what the local timezone is
2417 has changed again. It is now `/usr/local/etc/localtime' (or more
2418 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2420 * The distribution no longer contains any files with names longer than 14
2423 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2424 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2426 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2430 * The configuration process has changed quite a bit. The `configure'
2431 script is now used just like the configuration scripts for other GNU
2432 packages. The `sysdeps' directory hierarchy is much rearranged.
2433 The file `INSTALL' explains the new scheme in detail.
2435 * The header files no longer need to be processed into ANSI C and
2436 traditional C versions. There is just one set of files to install, and
2437 it will work with ANSI or old C compilers (including `gcc -traditional').
2439 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2440 MIPS DECStation running Ultrix 4.
2442 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2443 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2444 made itself into a shared library.
2446 * Yet further improved support for the i386, running 4.3 BSD-like systems
2447 (such as Mach 3 with the Unix single-server), or System V.
2449 * New function `strncasecmp' to do case-insensitive string comparison
2450 with limited length.
2452 * New function `strsep' is a reentrant alternative to `strtok'.
2454 * New functions `scandir' and `alphasort' for searching directories.
2456 * New function `setenv' is a better interface to `putenv'.
2458 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2459 function for traversing a directory tree.
2461 * The GNU obstack package is now also part of the C library.
2462 The new function `open_obstack_stream' creates a stdio stream that
2463 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2464 formatted output directly to an obstack.
2466 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2467 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2469 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2471 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2472 things to your strings.
2474 * There are some new test programs: test-fseek, testmb, and testrand.
2476 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2477 These ports are not finished, but are a good starting place for really
2478 supporting those systems.
2480 * `/etc/localtime' is now the standard location for the file that says what
2481 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2482 This follows the general principle that `/etc' is the place for all local
2483 configuration files.
2485 * The C library header files now use `extern "C"' when used by the C++
2486 compiler, so the C library should now work with C++ code.
2488 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2489 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2492 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2493 function which uses the `merge sort' algorithm, and is said to be
2494 significantly faster than the old GNU `qsort' function. Merge sort is
2495 now the standard `qsort' function. The new algorithm can require a lot
2496 of temporary storage; so, the old sorting function is called when the
2497 required storage is not available.
2499 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2500 provides the Unix `crypt' function, plus some other entry points.
2502 * The code and header files taken from 4.4 BSD have been updated with the
2503 latest files released from Berkeley.
2505 ----------------------------------------------------------------------
2506 Copyright information:
2508 Copyright (C) 1992-2014 Free Software Foundation, Inc.
2510 Permission is granted to anyone to make or distribute verbatim copies
2511 of this document as received, in any medium, provided that the
2512 copyright notice and this permission notice are preserved,
2513 thus giving the recipient permission to redistribute in turn.
2515 Permission is granted to distribute modified versions
2516 of this document, or of portions of it,
2517 under the above conditions, provided also that they
2518 carry prominent notices stating who last changed them.
2521 version-control: never
projects / platform / upstream / glibc.git / blob