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, 17259,
28 * Reverted change of ABI data structures for s390 and s390x:
29 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
30 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
31 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
32 are preserved pointing straight to the same implementation as the old ones.
33 Given that, new callers wil simply provide a too-big buffer to these
34 functions. Any applications/libraries out there that embed jmp_buf or
35 ucontext_t in an ABI-relevant data structure that have already been rebuilt
36 against 2.19 headers will have to rebuilt again. This is necessary in any
37 case to revert the breakage in their ABI caused by the glibc change.
39 * Support for file description locks is added to systems running the
40 Linux kernel. The standard file locking interfaces are extended to
41 operate on file descriptions, not file descriptors, via the use of
42 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
43 are associated with an open file instead of a process.
45 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
47 * The minimum Linux kernel version that this version of the GNU C Library
48 can be used with is 2.6.32.
50 * Running the testsuite no longer terminates as soon as a test fails.
51 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
52 with PASS or FAIL lines for individual tests. A summary of the results is
53 printed, including a list of failing lists, and "make check" exits with
54 error status if there were any unexpected failures. "make check
55 stop-on-test-failure=y" may be used to keep the old behavior.
57 * The am33 port, which had not worked for several years, has been removed
60 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
61 supported; they now act the same as _DEFAULT_SOURCE (but generate a
62 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
63 conflicted with POSIX (support for which was removed in 2.19), the
64 interfaces those macros enabled remain available when compiling with
65 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
68 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
70 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
71 This may improve lock scaling of existing programs on TX capable systems.
72 The lock elision code is only built with --enable-lock-elision=yes and
73 then requires a GCC version supporting the TX builtins. With lock elision
74 default mutexes are elided via __builtin_tbegin, if the cpu supports
75 transactions. By default lock elision is not enabled and the elision code
78 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
79 copy the path argument. This allowed programs to cause posix_spawn to
80 deference a dangling pointer, or use an unexpected pathname argument if
81 the string was modified after the posix_spawn_file_actions_addopen
84 * All supported architectures now use the main glibc sysdeps directory
85 instead of some being in a separate "ports" directory (which was
86 distributed separately before glibc 2.17).
88 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
89 On configurations that support it (all Linux configurations), it's now
90 used regardless of the --enable-add-ons switch to configure. It is no
91 longer possible to build such configurations without pthreads support.
93 * Locale names, including those obtained from environment variables (LANG
94 and the LC_* variables), are more tightly checked for proper syntax.
95 setlocale will now fail (with EINVAL) for locale names that are overly
96 long, contain slashes without starting with a slash, or contain ".." path
97 components. (CVE-2014-0475) Previously, some valid locale names were
98 silently replaced with the "C" locale when running in AT_SECURE mode
99 (e.g., in a SUID program). This is no longer necessary because of the
102 * On x86-64, the dynamic linker's lazy-binding support is now compatible
103 with application code using Intel MPX instructions. (With all previous
104 versions, the MPX register state could be clobbered when making calls
105 into or out of a shared library.) Note that while the new dynamic
106 linker is compatible with all known x86 hardware whether or not it
107 supports Intel MPX, some x86 instruction-set emulators might fail to
108 handle the new instruction encodings. This is known to affect Valgrind
109 versions up through 3.9 (but will be fixed in the forthcoming 3.10
110 release), and might affect other tools that do instruction emulation.
114 * The following bugs are resolved with this release:
116 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
117 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
118 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
119 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
120 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
121 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
122 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
123 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
124 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
125 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
126 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
127 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
128 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
129 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
130 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
131 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
132 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
133 16431, 16453, 16474, 16506, 16510, 16529
135 * Slovenian translations for glibc messages have been contributed by the
136 Translation Project's Slovenian team of translators.
138 * The public headers no longer use __unused nor __block. This change is to
139 support compiling programs that are derived from BSD sources and use
140 __unused internally, and to support compiling with Clang's -fblock
141 extension which uses __block.
143 * CVE-2012-4412 The strcoll implementation caches indices and rules for
144 large collation sequences to optimize multiple passes. This cache
145 computation may overflow for large collation sequences and may cause a
146 stack or buffer overflow. This is now fixed to use a slower algorithm
147 which does not use a cache if there is an integer overflow.
149 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
150 rules for large collation sequences to optimize multiple passes and falls
151 back to alloca if malloc fails, resulting in a possible stack overflow.
152 The implementation now falls back to an uncached collation sequence lookup
155 * CVE-2013-4788 The pointer guard used for pointer mangling was not
156 initialized for static applications resulting in the security feature
157 being disabled. The pointer guard is now correctly initialized to a
158 random value for static applications. Existing static applications need
159 to be recompiled to take advantage of the fix (bug 15754).
161 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
162 to the d_name member of struct dirent, or omit the terminating NUL
163 character. (Bugzilla #14699).
165 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
166 aligned_alloc functions could allocate too few bytes or corrupt the
167 heap when passed very large allocation size values (Bugzilla #15855,
170 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
171 for AF_INET6 has been fixed (Bugzilla #16072).
173 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
174 pap_CW, quz_PE, the_NP.
176 * Substantially revised locales: gd_GB, ht_HT
178 * The LC_ADDRESS field was updated to support country_car for almost all
181 * ISO 1427 definitions were updated.
183 * ISO 3166 definitions were updated.
185 * The localedef utility now supports --big-endian and --little-endian
186 command-line options to generate locales for a different system from that
187 for which the C library was built.
189 * Binary locale files now only depend on the endianness of the system for
190 which they are generated and not on other properties of that system. As a
191 consequence, binary files generated with new localedef may be incompatible
192 with old versions of the GNU C Library, and binary files generated with
193 old localedef may be incompatible with this version of the GNU C Library,
194 in the following circumstances:
196 + Locale files may be incompatible on m68k systems.
198 + Locale archive files (but not separate files for individual locales) may
199 be incompatible on systems where plain "char" is signed.
201 * The configure option --disable-versioning has been removed. Builds with
202 --disable-versioning had not worked for several years.
204 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
205 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
207 * SystemTap probes for malloc have been introduced.
209 * SystemTap probes for slow multiple precision fallback paths of
210 transcendental functions have been introduced.
212 * Support for powerpc64le has been added.
214 * The soft-float powerpc port now supports e500 processors.
216 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
218 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
219 set of header declarations that are enabled by default, even when other
220 feature test macros or compiler options such as -std=c99 would otherwise
221 disable some of those declarations.
223 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
224 conflict with POSIX. The libbsd-compat library (which was a dummy library
225 that did nothing) has also been removed.
227 * Preliminary documentation about Multi-Thread, Async-Signal and
228 Async-Cancel Safety has been added.
230 * Change of ABI data structures for s390 and s390x:
231 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
232 allow for future hardware extensions. All library functions that accept or
233 return these structures were versioned in order to provide backwards
234 compatibility with existing code. However, not all cases can be handled
235 with interface versioning. If an application embeds either structure into
236 another structure and that structure is passed to another compilation unit
237 which expects the newer larger-sized object then any access to the new
238 fields will result in undefined behaviour. Similarly any access to fields
239 that were moved by the enlarging of the structures will cause undefined
240 behaviour. To fix the undefined behaviour all objects that are part of the
241 final in-memory image must agree on the size of structures, and this may
242 require recompilation.
246 * The following bugs are resolved with this release:
248 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
249 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
250 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
251 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
252 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
253 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
254 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
255 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
256 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
257 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
258 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
259 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
260 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
263 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
264 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
265 Distributions can re-enable building and using pt_chown via the new configure
266 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
267 considerable security risks and should only be used if the distribution
268 understands and accepts the risks.
270 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
273 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
274 fixed (Bugzilla #15330).
276 * Add support for calling C++11 thread_local object destructors on thread
277 and program exit. This needs compiler support for offloading C++11
278 destructor calls to glibc.
280 * Improved worst case performance of libm functions with double inputs and
283 * Support for priority inherited mutexes in pthread condition variables on
284 non-x86 architectures.
286 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
288 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
290 * Optimized string functions for ARM. Implemented by Will Newton and
293 * Optimized libm functions for SPARC. Implemented by David S. Miller.
295 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
298 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
299 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
301 * Added a benchmark framework to track performance of functions in glibc.
303 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
304 It is based on draft TS 18661 and currently enabled as a GNU extension.
306 * On Linux, the clock function now uses the clock_gettime system call
307 for improved precision, rather than old times system call.
309 * Added support for version-3 tz format files. This is needed when using
310 the tz database release 2013e or later, and affects a few unusual cases --
311 currently only TZ='America/Godthab' for time stamps after 2037.
313 * Added new API functions pthread_getattr_default_np and
314 pthread_setattr_default_np to get and set the default pthread
315 attributes of a process.
317 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
318 This may improve lock scaling of existing programs on TSX capable systems.
319 When the --enable-lock-elision=yes parameter is specified at configure
320 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
323 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
324 availability). Implemented by Ryan S. Arnold.
326 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
330 * The following bugs are resolved with this release:
332 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
333 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
334 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
335 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
336 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
337 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
338 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
339 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
340 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
341 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
342 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
343 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
344 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
345 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
346 14879, 14889, 14893, 14898, 14914.
348 * Optimization of memcpy for MIPS.
350 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
351 EMFILE has been fixed (Bugzilla #14889).
353 * The add-on ports collection is now distributed in the "ports" subdirectory
354 of the main GNU C Library distribution, rather than separately.
356 * Port to ARM AArch64 contributed by Linaro.
358 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
359 Optimized versions of memcpy, memset, and memcmp added for System z10 and
361 Implemented by Andreas Krebbel.
363 * The new function secure_getenv allows secure access to the environment,
364 returning NULL if running in a SUID/SGID process. This function replaces
365 the internal function __secure_getenv.
367 * SystemTap static probes have been added into the dynamic linker.
368 Implemented by Gary Benson.
370 * Optimizations of string functions strstr, strcasestr and memmem.
371 Implemented by Maxim Kuvyrkov.
373 * The minimum Linux kernel version that this version of the GNU C Library
374 can be used with is 2.6.16.
376 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
377 powerpc POWER7. Implemented by Will Schmidt.
379 * New configure option --disable-nscd builds the C library such that it
380 never attempts to contact the Name Service Caching Daemon (nscd).
381 New configure option --disable-build-nscd avoids building nscd itself;
382 this is the default if --disable-nscd is used.
384 * Improved support for cross-compilation, including cross-testing and
385 bootstrap builds without a previously built glibc.
387 * Several testsuite tests are now able to test multiple IFUNC variants of an
388 interface, rather than just testing the one that would be chooen by
391 * New configure options --with-bugurl and --with-pkgversion, for
392 distributors to use to embed their bug-reporting and package version
393 information in --help and --version output.
395 * The ttyname and ttyname_r functions on Linux now fall back to searching for
396 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
397 allows creation of chroots without the procfs mounted on /proc.
399 * The `crypt' function now fails if passed salt bytes that violate the
400 specification for those values. On Linux, the `crypt' function will
401 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
402 enabled, and fail on encrypted strings using the MD5 or DES algorithm
403 when the mode is enabled.
405 * The `clock_*' suite of functions (declared in <time.h>) is now available
406 directly in the main C library. Previously it was necessary to link with
407 -lrt to use these functions. This change has the effect that a
408 single-threaded program that uses a function such as `clock_gettime' (and
409 is not linked with -lrt) will no longer implicitly load the pthreads
410 library at runtime and so will not suffer the overheads associated with
411 multi-thread support in other code such as the C++ runtime library.
413 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
418 * The following bugs are resolved with this release:
420 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
421 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
422 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
423 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
424 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
425 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
426 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
427 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
428 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
429 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
430 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
431 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
432 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
433 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
434 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
435 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
436 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
437 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
438 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
439 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
440 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
441 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
444 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
445 configuring glibc with:
446 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
447 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
448 Implemented by H.J. Lu.
452 + define static_assert
454 + do not declare gets
456 + declare at_quick_exit and quick_exit also for ISO C11
458 + aligned_alloc. NB: The code is deliberately allows the size parameter
459 to not be a multiple of the alignment. This is a moronic requirement
460 in the standard but it is only a requirement on the caller, not the
465 + uchar.h support added
467 + CMPLX, CMPLXF, CMPLXL added
469 Implemented by Ulrich Drepper.
471 * Support for the IA-64 has been moved to ports.
473 * Remove support for anything but ELF binary format
475 * Checking versions of poll, ppoll added.
476 Implemented by Ulrich Drepper.
478 * More generic and 64-bit performance optimizations to math functions.
479 Implemented by Ulrich Drepper.
481 * New configure option --enable-obsolete-rpc makes the deprecated RPC
482 headers and functions available at compile time as they were before
483 version 2.14. This option will be removed at some time in the future
484 after the TI-RPC library becomes fully sufficient for the needs of
485 existing applications.
487 * Compatibility code for Linux kernel versions before 2.4 has been removed.
488 Note that glibc is not expected to work with any Linux kernel version
491 * New header <sys/auxv.h> and function getauxval allowing easy access to
492 the AT_* key-value pairs passed from the Linux kernel. The header also
493 defines the HWCAP_* bits associated with the AT_HWCAP key.
495 * New locales: mag_IN
497 * New configure option --enable-systemtap builds SystemTap static probes
498 into libc for setjmp and longjmp and into libpthread for various operations.
499 So far the setjmp/longjmp probes and some of the libpthread probes are
500 provided only for i*86 and x86_64.
501 Implemented by Roland McGrath and Rayson Ho.
503 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
505 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
508 * More optimized functions for SPARC. Implemented by David S. Miller.
510 * Improved support for cross-compilation, especially bootstrap builds
511 without a previously built glibc.
513 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
514 Chris Metcalf from Tilera.
516 * Support for the old ARM ABI has been removed from ports. Only the EABI is
517 now supported for ARM processors.
519 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
520 as the name of the dynamic linker, to distinguish it from the
521 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
523 * Support for CRIS has been removed from ports.
525 * A new class of installed header has been documented for low-level
526 platform-specific functionality. PowerPC added the first instance with a
527 function to provide time base register access. Contributed by Tulio
528 Magno Quites Machado Filho.
530 * ix86 configurations now install header files that are consistent with
531 what x86-64 configurations install. These same header files can be used
532 for -m32, -m64, or -mx32 builds.
533 Contributed by H.J. Lu.
535 * Math library bug fixes. A thorough audit of all open math library bugs was
536 conducted by Joseph Myers. Significant progress was made on many math
537 library bugs resulting in more accurate exceptions and function results.
538 Many thanks to all those that contributed including Andreas Jaeger for his
539 patch review and work on the x87 trigonometric instruction issues.
541 * Timezone data is no longer installed. Timezone-related binaries and scripts
542 will continue to be installed. Users should obtain their timezone data from
543 their distribution provider or from the tzdata package at
544 <ftp://munnari.oz.au/pub/>.
548 * The following bugs are resolved with this release:
550 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
551 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
552 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
553 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
554 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
555 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
556 13484, 13506, 13515, 13523, 13524, 13538, 13540
558 * New program pldd to list loaded object of a process
559 Implemented by Ulrich Drepper.
561 * Add nss_db support back to glibc. No more dependency on Berkeley db
562 and support for initgroups lookups.
563 Implemented by Ulrich Drepper.
565 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
566 Contributed by HJ Lu.
568 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
569 Contributed by HJ Lu.
571 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
572 on x86-32 and x86-64.
573 Contributed by Liubov Dmitrieva.
575 * Optimized strchr and strrchr for SSE on x86-32.
576 Contributed by Liubov Dmitrieva.
578 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
579 for x86-64 and x86-32.
580 Contributed by Liubov Dmitrieva.
582 * New interfaces: scandirat, scandirat64
583 Implemented by Ulrich Drepper.
585 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
586 Implemented by Ulrich Drepper.
588 * nscd now also caches the netgroup database.
589 Implemented by Ulrich Drepper.
591 * Integrate libm with gcc's -ffinite-math-only option.
592 Implemented by Ulrich Drepper.
594 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
595 to math functions. Implemented by Ulrich Drepper.
597 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
598 Implemented by Ulrich Drepper.
600 * New Linux interfaces: process_vm_readv, process_vm_writev
602 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
603 Implemented by Ulrich Drepper.
605 * Optimized nearbyint and strcasecmp for PPC.
606 Implemented by Adhemerval Zanella.
608 * New locales: bho_IN, unm_US, es_CU, ta_LK
612 * The following bugs are resolved with this release:
614 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
615 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
616 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
617 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
618 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
619 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
620 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
621 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
622 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
623 12795, 12811, 12813, 12814, 12841
625 * The RPC implementation in libc is obsoleted. Old programs keep working
626 but new programs cannot be linked with the routines in libc anymore.
627 Programs in need of RPC functionality must be linked against TI-RPC.
628 The TI-RPC implementation is IPv6 enabled and there are other benefits.
630 Visible changes of this change include (obviously) the inability to link
631 programs using RPC functions without referencing the TI-RPC library and the
632 removal of the RPC headers from the glibc headers.
633 Implemented by Ulrich Drepper.
635 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
636 syncfs, setns, sendmmsg
638 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
639 yue_HK, lij_IT, mhr_RU
641 * New encodings: CP770, CP771, CP772, CP773, CP774
643 * New program sotruss to trace calls through PLTs
644 Implemented by Ulrich Drepper.
646 * The malloc hook implementation is marked deprecated and will be removed
647 from the default implementation in the next version. The design never
648 worked ever since the introduction of threads. Even programs which do
649 not create threads themselves can use multiple threads created internally.
653 * The following bugs are resolved with this release:
655 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
656 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
657 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
658 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
661 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
663 * POWER7 optimizations: memset, memcmp, strncmp
665 * New optimized string functions for x86-64: strnlen (SSE2),
666 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
667 Implemented by Ulrich Drepper.
671 * The following bugs are resolved with this release:
673 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
674 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
675 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
676 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
677 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
678 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
679 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
680 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
682 * New interfaces: pthread_getname_np, pthread_setname_np
684 * New Linux interface: recvmmsg
686 * STT_GNU_IFUNC implemented for Sparc by David Miller.
688 * The dynamic linker now recognizes supported ABI versions from the
689 EI_ABIVERSION field in the ELF header.
690 Implemented by Ulrich Drepper.
692 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
693 will not be used to fill in password fields in the passwd.byname replies.
694 Instead it is used to synthesize the shadow.byname table, should it be
695 missing. This is a useful mode in some installations involving Solaris.
696 Implemented by Ulrich Drepper.
698 * New locales: kok_IN, sq_MK, cv_RU
702 * The following bugs are resolved with this release:
704 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
705 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
706 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
707 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
708 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
709 10789, 10817, 10823, 10840, 10847
711 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
713 Implemented by Ulrich Drepper.
715 * Checking version of longjmp added that fails if an uninitialized stack
716 frame would be created. Implemented by Ulrich Drepper.
718 * STT_GNU_IFUNC is now supported in static executables.
719 Implemented by H.J. Lu.
721 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
723 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
724 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
725 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
726 Contributed by H.J. Lu.
728 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
729 Implemented by Ulrich Drepper.
731 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
733 Contributed by H.J. Lu.
735 * Support for fma instruction in AVX on x86-64.
736 Implemented by H.J. Lu and Ulrich Drepper.
738 * AVX support in x86-64 auditing support in ld.so.
739 Implemented by H.J. Lu.
741 * STB_GNU_UNIQUE support added.
742 Implemented by Ulrich Drepper.
744 * Implement second fallback mode for optimized DNS lookup for even more
745 broken environments. If two requests from the same port are not
746 handled correctly close the socket and open a new one before sending
747 the second request. The 'single-request-reopen' option in /etc/resolv.conf
748 can be used to select this mode right away, instead of rediscovering the
749 necessity is every process again.
750 Implemented by Ulrich Drepper.
752 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
753 Implemented by Adam Tkac.
755 * Optimized iconv conversions for S390x.
756 Implemented by Andreas Krebbel.
758 * Using condvars with PI mutexes is now more efficient due to kernel
759 support for requeueing to PI futexes. NPTL support added for x86-64.
760 Implemented by Ulrich Drepper.
762 * New locales: ps_AF, my_MM
766 * The following bugs are resolved with this release:
768 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
769 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
770 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
771 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
772 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
774 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
775 Implemented by Ulrich Drepper.
777 * New Linux interfaces: accept4, fallocate, fallocate64.
778 Implemented by Ulrich Drepper.
780 * Correct declarations of string function when used in C++ code. This
781 could lead to compile errors for invalid C++ code.
783 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
786 * New POSIX 2008 interface: psiginfo
787 Implemented by Ulrich Drepper.
789 * New ISO C++1x interfaces: quick_exit, at_quick_exit
790 Implemented by Ulrich Drepper.
792 * Support for selecting between multiple function definitions at runtime
793 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
795 * The libcrypt library can now use the hash function implementations in
796 NSS. Implemented by Ulrich Drepper.
798 * The malloc implementation can be compiled to be less memory efficient
799 but higher performing in multi-threaded programs.
800 Implemented by Ulrich Drepper.
802 * New locales: nan_TW@latin, ks_IN
804 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
805 Implemented by Ulrich Drepper.
807 * Extended printf hook support. It is possible to use user-defined types
808 and extend existing format specifiers.
809 Implemented by Ulrich Drepper.
811 * Handling for group shadow files has been added.
812 Implemented by Ulrich Drepper.
814 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
815 servers (the case, e.g., for some people using the built-in DNS
816 server in ADSL modems/routers). There is a once-per-process timeout
817 in case of a broken server. To avoid it, users can run nscd or put
818 'options single-request' in /etc/resolv.conf.
819 Implemented by Ulrich Drepper.
823 * The following bugs are resolved with this release:
825 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
826 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
827 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
828 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
829 6968, 6974, 6980, 6995, 7008, 7009, 7029
831 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
832 up at the same time. Implemented by Ulrich Drepper.
834 * TLS descriptors for LD and GD on x86 and x86-64.
835 Implemented by Alexandre Oliva.
837 * getaddrinfo now handles DCCP and UDPlite.
838 Implemented by Ulrich Drepper.
840 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
841 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
842 Implemented by Ulrich Drepper.
844 * New implementation of memmem, strstr, and strcasestr which is O(n).
845 Implemented by Eric Blake.
847 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
849 * Implement "e" option for popen to open file descriptor with the
850 close-on-exec flag set. Implemented by Ulrich Drepper.
852 * Implement "b" mode for fmemopen. In this mode writes writes don't
853 implicitly add a NUL byte and seeks from the end of the buffer really
854 use the buffer end, not the string length as the basis.
855 Implemented by Ulrich Drepper.
857 * Many functions, exported and internal, now atomically set the close-on-exec
858 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
860 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
862 Implemented by Pravin Satpute.
864 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
868 * The following bugs are resolved with this release:
870 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
871 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
872 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
873 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
874 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
875 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
876 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
878 * New locales: bo_CN, bo_IN, shs_CA.
880 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
882 * Sorting rules for some Indian languages (Devanagari and Gujarati).
883 Implemented by Pravin Satpute.
885 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
887 * nscd caches now all timeouts for DNS entries
888 Implemented by Ulrich Drepper.
890 * nscd is more efficient and wakes up less often.
891 Implemented by Ulrich Drepper.
893 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
894 vdprintf, and obstack_vprintf.
895 Implemented by Jakub Jelinek.
897 * Faster memset for x86-64.
898 Implemented by Harsha Jagasia and H.J. Lu.
900 * Faster memcpy on x86.
901 Implemented by Ulrich Drepper.
903 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
904 Implemented by Ulrich Drepper.
906 * Faster sqrt and sqrtf implemention for some PPC variants.
907 Implemented by Steven Munroe.
911 * The following bugs are resolved with this release:
913 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
914 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
915 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
916 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
917 5071, 5103, 5104, 5112, 5113, 5184, 5186
919 * More checking functions: fread, fread_unlocked, open*, mq_open.
920 Implemented by Jakub Jelinek and Ulrich Drepper.
922 * Extend fortification to C++. Implemented by Jakub Jelinek.
924 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
925 by not recognizing 'a' as a modifier when those specs are requested.
926 Implemented by Jakub Jelinek.
928 * PPC optimizations to math and string functions.
929 Implemented by Steven Munroe.
931 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
932 options to be passed. Implemented by Ulrich Drepper.
934 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
936 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
937 Implemented by Ulrich Drepper.
939 * Handle private futexes in the NPTL implementation.
940 Implemented by Jakub Jelinek and Ulrich Drepper.
942 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
943 Implemented by Roland McGrath and Ulrich Drepper.
945 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
947 * SHA-256 and SHA-512 based password encryption.
948 Implemented by Ulrich Drepper.
950 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
951 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
954 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
955 Implemented by Ulrich Drepper.
959 * The following bugs are resolved with this release:
961 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
962 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
963 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
964 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
965 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
966 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
967 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
970 * New Linux interfaces: epoll_pwait, sched_getcpu.
972 * New generic interfaces: strerror_l.
974 * nscd can now cache the services database. Implemented by Ulrich Drepper.
978 * The following bugs are resolved with this release:
980 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
981 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
982 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
983 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
984 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
985 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
986 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
987 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
988 3225, 3251, 3252, 3253, 3273
990 * For Linux, the sorting of addresses returned by getaddrinfo now also
991 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
992 Implemented by Ulrich Drepper.
994 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
995 Implemented by Ulrich Drepper.
997 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
999 * New iconv module for MIK. Contributed by Alexander Shopov.
1001 * For sites with broken group and/or passwd database, the auto-propagate
1002 option of nscd can prevent creating ID lookup entries from the results
1003 of a name lookup and vice versa. This usually is no problem but some
1004 site might have problems with the default behavior.
1005 Implemented by Ulrich Drepper.
1007 * Iterating over entire database in NIS can be slow. With the
1008 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1009 to trade time for memory. The entire database will be read at once.
1010 Implemented by Ulrich Drepper.
1012 * The interfaces introduced in RFC 3542 have been implemented by
1015 * Support for the new ELF hash table format was added by Ulrich Drepper.
1017 * Support for priority inheritance mutexes added by Jakub Jelinek and
1020 * Support for priority protected mutexes added by Jakub Jelinek.
1022 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1023 or_IN, csb_PL, fy_NL, sr_ME.
1027 * More overflow detection functions.
1029 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1030 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1032 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1033 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1034 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1035 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1036 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1037 by Masahide Washizawa.
1039 * It is now possible to install audit libraries for the dynamic linker using
1040 LD_AUDIT. Implemented by Ulrich Drepper.
1042 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1043 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1044 For a libc and libpthread that works well on Linux 2.4 kernels, we
1045 recommend using the stable 2.3 branch.
1047 * The new function open_wmemstream acts like open_memstream,
1048 but uses a wchar_t wide character buffer.
1050 * The new function ppoll is an improved version of poll, similar to pselect.
1052 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1053 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1054 renameat, unlinkat, linkat, symlinkat, readlinkat.
1056 * New Linux kernel system calls: unshare,
1057 inotify_init, inotify_add_watch, inotify_rm_watch.
1059 * The euidaccess function is now also known by the alias eaccess,
1060 for compatibility with some other systems.
1062 * Timezone data updated to 2006b version.
1066 * The following bugs are resolved with this release:
1068 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1069 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1070 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1071 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1072 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1073 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1075 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1077 * As of this release, GCC 4 can be used to compile the C Library.
1079 * Timezone data updated to 2005m version.
1083 * The following bugs are resolved with this release:
1085 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1086 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1087 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1088 777, 787, 821, 822, 823, 825
1090 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1094 * Support for RFC 3678. Real implementations exist only for Linux so far.
1095 Implemented by Ulrich Drepper.
1097 * nscd can now cache entries persistently. Expiring entries are reloaded.
1098 For speedups the cache can be shared in memory with client processes.
1099 Implemented by Ulrich Drepper.
1101 * nscd can now perform SELinux checks.
1102 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1104 * getaddrinfo queries are now cached. Canonical name lookup is performed
1106 Implemented by Ulrich Drepper.
1108 * The nothrow function attribute is used when headers are used by gcc when
1109 compiling C code. This can avoid significant amounts of exception
1112 * The malloc functions perform more error checking and are stricter when
1113 it comes to reacting on errors. The default action is to terminate
1114 the process after showing an error message. Implemented by Ulrich Drepper.
1116 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1117 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1119 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1120 namespaces using the new function dlmopen(). This feature is of course,
1121 like most other dynamic loading functionality, not available in statically
1122 linked applications. Implemented by Ulrich Drepper.
1124 * Low-overhead boundary checking variants of string and some stdio functions
1125 were added. These are to be used in conjunction with a gcc patch by
1126 Jakub Jelinek which adds calls to these functions if possible.
1127 Implemented by Jakub Jelinek and Ulrich Drepper.
1129 * Old code for several operating systems and machine architectures that
1130 have not been in working condition in a long time have been removed from
1131 the main source tree maintained by the GNU C Library's maintainers.
1132 These files are now reside in the separate `ports' source module
1133 that is usable as an add-on when building the library.
1137 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1138 interrogate the dynamic linker, compatible with the Solaris interface.
1140 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1141 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1143 * getifaddrs now uses the netlink interface on Linux to get its information.
1144 Implemented by Thorsten Kukuk.
1146 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1147 Implemented by Ulrich Drepper.
1149 * support for non-executable stacks on x86 has been added. Changes mostly
1152 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1155 * getaddrinfo now performs destination address selection according to
1160 * Thread-safe interfaces for many functions that access locale data
1161 were added in version 2.3, but these features were omitted from NEWS.
1162 Many functions have variants with an `_l' suffix that take a `locale_t'
1163 object as a parameter rather than consulting the current locale.
1164 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1165 create and maintain `locale_t' objects. Additionally, the new function
1166 `uselocale' sets "the current locale" (as used by functions not so
1167 parameterized) set for an individual thread. These features were added
1168 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1170 * The functions getresuid, getresgid, setresuid, and setresgid, which
1171 have long been available on Linux, are now declared in <unistd.h>
1172 and are now also available on the Hurd.
1174 * ELF thread-local storage support (TLS) now works on x86-64.
1176 * The new dynamic string token $LIB is expanded in shared library names.
1177 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1179 * Aldy Hernandez contributed complete software floating point support for
1180 PowerPC machines with no FPU.
1182 * fexecve is implemented on Linux.
1184 * The `btowc' function should work at least twice as fast due to
1185 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1187 * With approriate thread add-ons cancelable functions are now implemented
1188 in libc.so as well. No need to call the function in libpthread. This
1189 change allowed to finally disable the incorrect and expensive handling
1190 of weak definition in ld.so.
1192 * Yet more PLT entries in libc.so have been removed. We finally arrived
1193 at the bare minimum. Startup times improved appropriately.
1195 * Support for the new Linux/x86 system call interface was added. The
1196 AT_SYSINFO auxiliary vector entry is recognized and handled.
1200 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1203 * iconv (the program and the interface) now accepts empty names (excluding
1204 options like //TRANSLIT) to mean "use charset of current locale".
1206 * localedef can now transliterate characters in strings which are not in
1207 the provided charmap. The information from the input locale is used.
1209 * Prelinking support was added for ELF targets. This requires additional
1210 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1212 * Read-only stdio streams now use mmap to speed up operation by eliminating
1213 copying and buffer underflows. To use add 'm' to the mode string of
1214 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1216 * The malloc functions were completely rewritten by Wolfram Gloger based
1217 on Doug Lea's malloc-2.7.0.c.
1219 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1220 implementation of regex.
1222 * Bruno Haible upgraded the iconv and locale implementation to support
1225 * Contents of the LC_* and LANG environment variables in the CEN style are
1226 not recognized anymore. It never was used. Change by Ulrich Drepper.
1228 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1229 thread-local storage (TLS) ABI on some platforms.
1230 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1232 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1233 EUC-JISX0213, and TSCII.
1235 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1236 BSD-compatible interface for getting all network interface addresses.
1237 Implementation for IPv4 by Roland McGrath.
1239 * Loading of locale data is faster due to the introduction of a locale
1240 archive. Implemented by Roland McGrath and Ulrich Drepper.
1242 * Startup times are significantly reduced by not using exported functions
1243 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1246 * Steven Munroe contributed a port to PowerPC64/Linux.
1250 * The Hurd now uses the GNU libio implementation of stdio rather than the
1251 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1253 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1254 with the same behavior as the Linux system call of the same name.
1258 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1259 128-bit long double format.
1261 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1262 IBM1161, and IBM1162 charsets.
1264 * Andreas Jaeger contributed a port to x86-64/Linux.
1266 * Peter Bruin contributed a port to PowerPC/Hurd.
1268 * libc functions using I/O streams now can handle wide-oriented streams
1271 * optimizations in the dynamic linker. Binaries created by recent binutils
1272 versions start up quicker due to reduced time spent on relocations.
1274 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1278 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1279 asinh, atanh, j0 for the 128-bit long double format.
1281 * Bruno Haible updated all the code handling Unicode in some form to
1282 support Unicode 3.1.
1284 * Speed of regex for single-byte locales is back to previous levels.
1285 Patch by Isamu Hasegawa.
1287 * Alpha, SPARC, and IA-64 now also using floating stacks.
1289 * Startup time of internationalized applications greatly improved through
1290 iconv cache. Use iconvconfig to generate the cache file.
1291 Contributed by Ulrich Drepper.
1293 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1294 severe performance problems. Patch by David Mosberger.
1296 * The Hurd port got a lot more functionality like AIO, various stdio
1297 extensions, etc. Mainly done by Roland McGrath.
1299 * mtrace can now lookup symbols in shared libraries.
1303 * Intel's IA-64 math library is largely integrated. It provides fast and
1304 accurate implementatations for most basic and standard math functions
1305 in float, double, and long double format.
1307 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1308 and asin for the 96-bit long double format and asin, log, tan for the
1309 128-bit long double format.
1311 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1312 The basic double functions exist today. Contributed by Abraham Ziv
1313 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1314 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1316 * An asynchronous name lookup library was added. The interface is designed
1317 after POSIX AIO. The proposal was circulated beforehand to get comments.
1318 No negative ones came in. Implemented by Ulrich Drepper.
1320 * Port to S390/64bit contributed by Martin Schwidefsky
1321 <schwidefsky@de.ibm.com>.
1323 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1324 of functions for Linux/IA-64.
1326 * The RPC code is now thread safe. Threads can now use the same service
1327 of different services at the same time. Patch by Eric Norum
1328 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1330 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1331 family of functions for Linux/S390.
1333 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1334 of functions for Linux/x86.
1336 * Port to Linux/CRIS contributed by Axis Communications.
1340 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1341 we can now check for namespace violations and missing declarations. The
1342 result is that almost all headers are now Unix-compliant (as defined in
1343 the upcoming XPG6). The negative side is that some programs might need
1344 corrections, too, if they depend on the incorrect form of the headers in
1345 previous versions which defined too many symbols and included too many
1348 * regex now handles multibyte character sets correctly.
1349 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1351 * iconv (the program) does now conform to the upcoming XPG6 and handles
1352 charmaps. Instead of the charset names the path of charmaps can be
1353 provided and the conversion happens based on this data.
1354 Contributed by Ulrich Drepper.
1356 * The locale program now provides detailed information about the installed
1361 only lists the names of the supported locales
1365 provides details such as country, language, and codeset name.
1366 Contributed by Ulrich Drepper.
1370 * The gencat program now parses the input file according to the charset
1371 selected by the LC_CTYPE category. This is important for stateful
1372 character sets. To make generating catalogs easier there is a way
1373 to overwrite the charset selected by the locale: before the first
1374 message or $ quote line the catalog can contain a line like
1376 $ codeset=ISO-8859-2
1378 to select the charset (ISO-8859-2 in this case).
1380 Implemented by Shinya Hanataka and Ulrich Drepper.
1382 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1383 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1384 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1386 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1387 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1389 * The LANGUAGE environment variable is now ignored unless the locale is
1390 changed from the default "C" locale.
1392 * The usual bug fixes.
1396 * Greg McGary added runtime support for bounds checking using gcc's
1397 new -fbounded-pointers option. ix86 target is complete. PowerPC
1400 * Thorsten Kukuk added secure mode support to nscd.
1402 * The Berkeley db libraries have been removed.
1404 Related, the nss_db module is now in a separate package since it
1405 obviously requires a database library being available.
1407 * Wide character I/O streams implemented by Ulrich Drepper.
1409 * Functions from the extended socket API added by Ulrich Drepper.
1411 * Functions feenableexcept and fedisableexcept to control the
1412 behaviour of individual exceptions have been added by Andreas Jaeger.
1414 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1416 * The resolver code has been updated from bind 8.2.3-T5B which supports
1417 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1420 This change could in some situations effect backward compatibility. Since
1421 now `_res' is a thread-local instead of a global variable, modifying it
1422 in one thread does not have any effect in other threads.
1424 The resolver library was also extended to allow IPv6 as the transport
1425 protocol for the requests. This work was done by Stig Venaas.
1427 * Compatibility code for K&R C compilers has been removed from the
1428 header files. A ISO C compiler is needed to use the library
1429 (conforming to either C89 or C99 standard).
1431 * Complete rewrite of the localedef program to support multibyte character
1432 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1433 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1434 Implemented by Ulrich Drepper.
1436 Bruno Haible significantly improved the generation and use of the data
1437 structures for the wide character tables.
1439 * Plural handling in gettext implemented by Ulrich Drepper.
1441 * The utmp daemon has been removed.
1443 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1445 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1448 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1450 * POSIX barriers implemented by Kaz Kylheku.
1452 * POSIX spawn function family implemented by Ulrich Drepper.
1454 * POSIX spinlocks are now available.
1456 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1458 * the configure option --enable-kernel=X.Y.Z allows to strip out
1459 compatibility for kernel versions before X.Y.Z. This is currently only
1460 implemented for Linux.
1462 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1463 field sin6_scope_id. This means that all programs using IPv6 should be
1464 recompiled. Don't expect binary compatibility with previous glibc
1467 * various conversion modules for IBM character sets contributed by
1470 * IA-64 port by Jes Sorensen and HJ Lu.
1484 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1486 * New xdr functions are added; some rpc functions are now 64bit clean.
1488 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1490 * Fixed known incompatibilities with glibc 2.0.
1492 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1494 * Optimized a number of functions (especially the ELF dynamic loader).
1496 * Update timezone data files.
1498 * lots of charmaps corrections
1500 * some new locale definitions and charmaps
1505 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1506 conform to POSIX member type requirements. Symbol versions have been
1507 adjusted as needed within the library, and for direct use by applications,
1508 but there is potential for problems if third-party libraries use
1509 struct timeval as part of their interface. This does not present
1510 a problem for X and other "essential" system libraries.
1512 * An additional locale model to support C++ Standard Library locale
1513 model and probably more was implemented by Ulrich Drepper.
1515 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1518 * Miles Bader provided the `argp' function family to support hierachical
1519 command line argument parsing, layered on top of getopt.
1521 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1523 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1526 * scanf recognizes the %a and %A format for scanning floating point numbers.
1528 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1529 information and interfaces for the available integer types.
1531 * about 130 new math functions were added to implement the ISO C9x math
1534 * the new header <complex.h> contains definitions of the complex math
1535 functions from ISO C 9X.
1537 * the new header <tgmath.h> defines generic macros to use complex or
1538 real valued functions.
1540 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1542 * Andreas Jaeger provided a test suite for the math library.
1544 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1546 * Ulrich Drepper added character set conversion functions (iconv).
1548 * Optimized string functions have been added.
1550 * The localedata addon is now part of glibc.
1552 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1554 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1555 daemon for NSS (nscd).
1557 Missing a better place here are some numbers on improvements. Under
1558 Linux 2.1.125 un-tar-ing the kernel sources takes
1562 using local files 12.19s 6.88s 22.91s
1564 using NIS 13.92s 8.91s 26.34s
1566 using NIS & nscd 10.37s 7.34s 25.30s
1568 using NIS+ 27.57s 30.37s 640.46s
1570 using NIS+ & nscd 10.25s 7.83s 26.51s
1572 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1574 Keep in mind that non-namelookup related operations dominate above times.
1575 It was just a common complain that using NIS+ unpacking the kernel is
1578 [1] The old nscd implementation is not available anymore since it was
1579 distributed with glibc up to version 2.0.98 and thus is now replaced.
1581 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1583 * Mark Kettenis provided a Hesiod NSS module.
1585 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1586 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1588 * rcmd can now handle netgroups (Dick Streefland).
1590 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1593 * Support for the IPv6 protocol has been added to the socket API, as per the
1594 latest draft standards.
1596 * Support for Linux 2.2 has been added.
1598 * Interface changes relative to the latest 2.0.x release:
1599 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1600 addseverity NEW: Unix98
1601 alphasort64 NEW: LFS
1602 argp_err_exit_status NEW: argp, GNU ext
1603 argp_error NEW: argp, GNU ext
1604 argp_failure NEW: argp, GNU ext
1605 argp_help NEW: argp, GNU ext
1606 argp_parse NEW: argp, GNU ext
1607 argp_program_bug_address NEW: argp, GNU ext
1608 argp_program_version NEW: argp, GNU ext
1609 argp_program_version_hook NEW: argp, GNU ext
1610 argp_state_help NEW: argp, GNU ext
1611 argp_usage NEW: argp, GNU ext
1612 authdes_create NEW: Secure RPC
1613 authdes_getucred NEW: Secure RPC
1614 authdes_pk_create NEW: Secure RPC
1615 backtrace NEW: GNU ext.
1616 backtrace_symbols NEW: GNU ext.
1617 backtrace_symbols_fd NEW: GNU ext.
1619 cacosf NEW: ISO C 9x
1620 cacosh NEW: ISO C 9x
1621 cacoshf NEW: ISO C 9x
1622 cacoshl NEW: ISO C 9x
1623 cacosl NEW: ISO C 9x
1630 casinf NEW: ISO C 9x
1631 casinh NEW: ISO C 9x
1632 casinhf NEW: ISO C 9x
1633 casinhl NEW: ISO C 9x
1634 casinl NEW: ISO C 9x
1636 catanf NEW: ISO C 9x
1637 catanh NEW: ISO C 9x
1638 catanhf NEW: ISO C 9x
1639 catanhl NEW: ISO C 9x
1640 catanl NEW: ISO C 9x
1641 cbc_crypt NEW: Secure RPC
1645 ccoshf NEW: ISO C 9x
1646 ccoshl NEW: ISO C 9x
1652 cimagf NEW: ISO C 9x
1653 cimagl NEW: ISO C 9x
1654 clearerr_locked REMOVED
1655 clntunix_create NEW: sunrpc ext
1657 clog10 NEW: ISO C 9x
1658 clog10f NEW: ISO C 9x
1659 clog10l NEW: ISO C 9x
1669 cprojf NEW: ISO C 9x
1670 cprojl NEW: ISO C 9x
1672 crealf NEW: ISO C 9x
1673 creall NEW: ISO C 9x
1678 csinhf NEW: ISO C 9x
1679 csinhl NEW: ISO C 9x
1682 csqrtf NEW: ISO C 9x
1683 csqrtl NEW: ISO C 9x
1687 ctanhf NEW: ISO C 9x
1688 ctanhl NEW: ISO C 9x
1690 des_setparity NEW: Secure RPC
1691 ecb_crypt NEW: Secure RPC
1692 endutxent NEW: Unix98
1694 exp10f NEW: ISO C 9x
1695 exp10l NEW: ISO C 9x
1699 fattach NEW: STREAMS
1700 fdetach NEW: STREAMS
1704 feclearexcept NEW: ISO C 9x
1705 fegetenv NEW: ISO C 9x
1706 fegetexceptflag NEW: ISO C 9x
1707 fegetround NEW: ISO C 9x
1708 feholdexcept NEW: ISO C 9x
1710 feraiseexcept NEW: ISO C 9x
1711 ferror_locked REMOVED
1712 fesetenv NEW: ISO C 9x
1713 fesetexceptflag NEW: ISO C 9x
1714 fesetround NEW: ISO C 9x
1715 fetestexcept NEW: ISO C 9x
1716 feupdateenv NEW: ISO C 9x
1717 fflush_locked REMOVED
1721 fgets_unlocked NEW: GNU ext.
1722 fileno_locked REMOVED
1734 fputc_locked REMOVED
1735 fputs_unlocked NEW: GNU ext.
1736 fread_unlocked NEW: GNU ext.
1741 fstatvfs NEW: Unix98
1745 ftruncate64 NEW: LFS
1747 fwrite_unlocked NEW: GNU ext.
1748 gai_strerror NEW: IPv6
1752 getchar_locked REMOVED
1754 getdate_err NEW: Unix98
1755 getdate_r NEW: GNU ext.
1757 getnameinfo NEW: IPv6
1758 getnetname NEW: Secure RPC
1759 getpmsg NEW: STREAMS
1760 getpt NEW: Unix98 PTY
1761 getrlimit64 NEW: LFS
1762 getutxent NEW: Unix98
1763 getutxid NEW: Unix98
1764 getutxline NEW: Unix98
1765 glob64 NEW: GNU ext.
1766 globfree64 NEW: GNU ext.
1767 gnu_get_libc_release NEW: GNU ext.
1768 gnu_get_libc_version NEW: GNU ext.
1769 grantpt NEW: Unix98 PTY
1770 host2netname NEW: Secure RPC
1772 iconv_close NEW: iconv
1773 iconv_open NEW: iconv
1774 if_freenameindex NEW: IPv6
1775 if_indextoname NEW: IPv6
1776 if_nameindex NEW: IPv6
1777 if_nametoindex NEW: IPv6
1778 in6addr_any NEW: IPv6
1779 in6addr_loopback NEW: IPv6
1780 inet6_isipv4mapped NEW: IPv6
1781 isastream NEW: STREAMS
1782 iswblank NEW: GNU ext.
1783 key_decryptsession NEW: Secure RPC
1784 key_decryptsession_pk NEW: Secure RPC
1785 key_encryptsession NEW: Secure RPC
1786 key_encryptsession_pk NEW: Secure RPC
1787 key_gendes NEW: Secure RPC
1788 key_get_conv NEW: Secure RPC
1789 key_secretkey_is_set NEW: Secure RPC
1790 key_setnet NEW: Secure RPC
1791 key_setsecret NEW: Secure RPC
1792 llrint NEW: ISO C 9x
1793 llrintf NEW: ISO C 9x
1794 llrintl NEW: ISO C 9x
1795 llround NEW: ISO C 9x
1796 llroundf NEW: ISO C 9x
1797 llroundl NEW: ISO C 9x
1802 lrintf NEW: ISO C 9x
1803 lrintl NEW: ISO C 9x
1804 lround NEW: ISO C 9x
1805 lroundf NEW: ISO C 9x
1806 lroundl NEW: ISO C 9x
1808 makecontext NEW: Unix98
1809 mempcpy NEW: GNU ext.
1812 modify_ldt NEW: kernel
1816 nearbyint NEW: ISO C 9x
1817 nearbyintf NEW: ISO C 9x
1818 nearbyintl NEW: ISO C 9x
1819 netname2host NEW: Secure RPC
1820 netname2user NEW: Secure RPC
1821 nexttoward NEW: ISO C 9x
1822 nexttowardf NEW: ISO C 9x
1823 nexttowardl NEW: ISO C 9x
1827 passwd2des NEW: Secure RPC
1829 pow10f NEW: GNU ext.
1830 pow10l NEW: GNU ext.
1833 printf_size NEW: GNU ext.
1834 printf_size_info NEW: GNU ext.
1835 profil_counter REMOVED
1836 pthread_mutexattr_getkind_np REPLACED
1837 pthread_mutexattr_setkind_np REPLACED
1838 ptsname NEW: Unix98 PTY
1839 ptsname_r NEW: Unix98 PTY
1841 putchar_locked REMOVED
1842 putgrent NEW: GNU ext.
1844 putpmsg NEW: STREAMS
1845 pututxline NEW: Unix98
1849 readdir64_r NEW: LFS
1850 remquo NEW: ISO C 9x
1851 remquof NEW: ISO C 9x
1852 remquol NEW: ISO C 9x
1854 roundf NEW: ISO C 9x
1855 roundl NEW: ISO C 9x
1857 scalbln NEW: ISO C 9x
1858 scalblnf NEW: ISO C 9x
1859 scalblnl NEW: ISO C 9x
1861 sendfile NEW: kernel
1862 setcontext NEW: Unix98
1863 setrlimit64 NEW: LFS
1864 setutxent NEW: Unix98
1866 sigignore NEW: Unix98
1867 sigqueue NEW: POSIX.1b
1868 sigrelse NEW: Unix98
1869 sigset NEW: POSIX.1b
1870 sigtimedwait NEW: POSIX.1b
1871 sigwaitinfo NEW: POSIX.1b
1872 sincos NEW: GNU ext.
1873 sincosf NEW: GNU ext.
1874 sincosl NEW: GNU ext.
1878 strcasestr NEW: GNU ext.
1879 strtoimax NEW: ISO C 9x
1880 strtoumax NEW: ISO C 9x
1881 strverscmp NEW: GNU ext.
1882 svcauthdes_stats NEW: Secure RPC
1883 svcunix_create NEW: sunrpc etx
1884 svcunixfd_create NEW: sunrpc ext
1885 swapcontext NEW: Unix98
1886 tcgetsid NEW: Unix98 PTY
1887 tdestroy NEW: GNU ext.
1888 tgamma NEW: ISO C 9x
1889 tgammaf NEW: ISO C 9x
1890 tgammal NEW: ISO C 9x
1894 truncf NEW: ISO C 9x
1895 truncl NEW: ISO C 9x
1897 unlockpt NEW: Unix98 PTY
1898 updwtmpx NEW: Unix98
1899 user2netname NEW: Secure RPC
1900 utmpxname NEW: Unix98
1901 versionsort NEW: GNU ext.
1902 versionsort64 NEW: GNU ext.
1904 wcscasecmp NEW: GNU ext.
1905 wcsncasecmp NEW: GNU ext.
1906 wcsnlen NEW: GNU ext.
1907 wcstoimax NEW: ISO C 9x
1908 wcstoll NEW: ISO C 9x
1909 wcstoull NEW: ISO C 9x
1910 wcstoumax NEW: ISO C 9x
1912 wordexp NEW: POSIX.2
1913 wordfree NEW: POSIX.2
1914 write_profiling REMOVED
1915 xdecrypt NEW: Secure RPC
1916 xdr_authdes_cred NEW: Secure RPC
1917 xdr_authdes_verf NEW: Secure RPC
1918 xdr_cryptkeyarg NEW: Secure RPC
1919 xdr_cryptkeyarg2 NEW: Secure RPC
1920 xdr_cryptkeyres NEW: Secure RPC
1921 xdr_getcredres NEW: Secure RPC
1922 xdr_key_netstarg NEW: Secure RPC
1923 xdr_key_netstres NEW: Secure RPC
1924 xdr_keybuf NEW: Secure RPC
1925 xdr_keystatus NEW: Secure RPC
1926 xdr_netnamestr NEW: Secure RPC
1927 xdr_sizeof NEW: Secure RPC
1928 xdr_unixcred NEW: sunrpc ext
1929 xencrypt NEW: Secure RPC
1930 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1941 * inet_ntoa is thread-safe
1943 * updwtmp is moved from libutil to libc
1945 * rewrite of cbrt function
1947 * update of timezone data
1961 * add atoll function
1963 * fix complex problems in Berkeley DB code
1965 * fix math functions
1969 * fixed lots of header problems (especially Linux/GNU specific)
1971 * dynamic loader preserves all registers
1973 * Roland McGrath provided support for handling of auxiliary objects in
1974 the ELF dynamic loader.
1976 * support for parallel builds is improved
1980 * GNU extensions are no longer declared by default. To enable them you
1981 must define the macro `_GNU_SOURCE' in your program or compile with
1984 * The library has changed from using GNU ld symbol aliases to using weak
1985 symbols where available. The ELF object file format supports weak
1986 symbols; GNU ld also supports weak symbols in the a.out format. (There
1987 is also now support for other GNU ld extensions in ELF. Use the
1988 `--with-elf' option to configure to indicate you have ELF, and
1989 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1990 of many files which contained only symbol aliases, reducing the size of
1991 the source and the compiled library; many other files were renamed to
1992 less cryptic names previously occupied by the symbol alias files.
1993 There is a new header file <elf.h> for programs which operate on
1994 files in the ELF format.
1996 * Converted to Autoconf version 2, so `configure' has more options.
1997 Run `configure --help' to see the details.
1999 * The library can now be configured to build profiling, highly-optimized
2000 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2001 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2002 `configure' enable building these extra libraries. The shared library is
2003 built by default when using both ELF and GNU ld. When shared libraries
2004 are enabled, the new library `-ldl' is available for arbitrary run-time
2005 loading of shared objects; its interface is defined in <dlfcn.h>. The
2006 new header file <link.h> gives access to the internals of the run-time
2007 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2008 application of same name on other systems and it provides information
2009 about dynamically linked binaries.
2011 * The C library now provides the run-time support code for profiling
2012 executables compiled with `-pg'. Programs can control the profiling code
2013 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2014 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2015 the support for this file format was contributed by David Mosberger-Tang.
2017 * The math code has been replaced with a math library based on fdlibm from
2018 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2019 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2020 functions. The math functions now reside in a separate library, so
2021 programs using them will need to use `-lm' their linking commands.
2023 * John C. Bowman contributed optimized ix87 assembler inline functions.
2025 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2026 mechanism similar to that found in Solaris 2. This is now used for the
2027 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2028 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2029 file controls what services are used for each individual database. This
2030 works by loading shared libraries with names specified in `nsswitch.conf',
2031 so service modules can be changed or added at any time without even
2032 relinking any program. Currently there are the file, db, and NIS based
2033 NSS services available.
2035 * The new functions `strtoq' and `strtouq' parse integer values from
2036 strings, like `strtol' and `strtoul', but they return `long long int' and
2037 `unsigned long long int' values, respectively (64-bit quantities).
2039 * The new functions `strtof' and `strtold' parse floating-point values from
2040 strings, like `strtod', but they return `float' and `long double' values,
2041 respectively (on some machines `double' and `long double' are the same).
2043 * Ulrich Drepper has contributed new implementations of the floating-point
2044 printing and reading code used in the `printf' family of functions and
2045 `strtod', `strtof', and `strtold'. These new functions are perfectly
2046 accurate, and much faster than the old ones.
2048 * The implementation of the POSIX locale model was completely rewritten by
2049 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2050 to compile the POSIX locale definition.
2052 * The former dummy implementations of the strcoll and strxfrm function are
2053 now replaced by fully functional code contributed by Ulrich Drepper. The
2054 collation information comes from the POSIX locale definitions.
2056 * The new header <langinfo.h> defines an interface for accessing
2057 various locale-dependent data (using the locale chosen with `setlocale').
2059 * Ulrich Drepper has contributed a new suite of functions for operation on
2060 wide-character and multibyte-character strings, in <wchar.h>;
2061 and classification and case conversion of wide characters, in <wctype.h>.
2062 These new functions are conforming to the ISO C, Amendement 1 specification.
2064 * There is now a second implementation of the standard I/O library available.
2065 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2066 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2068 * You can now use positional parameter specifications in format strings
2069 for the `printf' and `scanf' families of functions. For example,
2070 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2071 ``Number 6, Mr Jones''. This is mainly useful when providing different
2072 format strings for different languages, whose grammars may dictate
2073 different orderings of the values being printed. To support this
2074 feature, the interface for `register_printf_handler' has changed; see
2075 the header file <printf.h> for details.
2077 * The `printf' and `scanf' families of functions now understand a new
2078 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2079 to group numbers as indicated by the locale; for `scanf' and friends, this
2080 says to accept as valid only a number with all the proper grouping
2081 separators in the right places. In the default "C" locale, numbers are
2082 not grouped; but locales for specific countries will define the usual
2083 conventions (i.e. separate thousands with `,' in the US locale).
2085 * The pgrp functions have been regularized, slightly incompatibly but much
2086 less confusingly. The core functions are now `getpgid' and `setpgid',
2087 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2088 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2089 provided for compatibility. There is no longer an incompatible `getpgrp'
2090 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2092 * The new header file <fts.h> and suite of functions simplify programs that
2093 operate on directory trees. This code comes from 4.4 BSD.
2095 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2096 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2097 NSS scheme used in glibc.
2099 * There is a new malloc debugging hook `__memalign_hook'.
2101 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2102 `unsigned int' in <sys/types.h>. These are for compatibility only and
2103 their use is discouraged.
2105 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2106 done differently, so that it works even without GNU ld.
2108 * New function `euidaccess' checks allowed access to a file like `access',
2109 but using the effective IDs instead of the real IDs.
2111 * The time zone data files have been updated for the latest and greatest
2112 local time conventions of the countries of the world.
2114 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2117 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2118 for formatting floating-point numbers. They are provided only for
2119 compatibility; new programs should use `sprintf' instead. There are
2120 also equivalent function for the `long double' floating-point type and
2121 all functions also exist in a reentrant form.
2123 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2124 functions for maintaining the login-record files (primarily of use to
2125 system programs such as `login'), and convenient functions for
2126 allocating and initializing a pseudo-terminal (pty) device.
2128 * Ulrich Drepper has contributed new support for System V style
2129 shared memory and IPC on systems that support it.
2131 * Ulrich Drepper has contributed several miscellaneous new functions found
2132 in System V: The `hsearch' family of functions provide an effective
2133 implementation of hash tables; `a64l' and `l64a' provide a very simple
2134 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2137 * Ulrich Drepper has contributed new reentrant counterparts for the
2138 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2140 * Ulrich Drepper has contributed new, highly-optimized versions of several
2141 string functions for the i486/Pentium family of processors.
2143 * Ulrich Drepper has updated the Linux-specific code, based largely
2144 on work done in Hongjiu Lu's version of GNU libc for Linux.
2145 The GNU library now supports Linux versions 2.0.10 and later,
2146 using the ELF object file format (i[3456]86-*-linux).
2148 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2150 * David Mosberger-Tang and Richard Henderson have ported the C library
2151 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2152 dynamic linking support for ELF/Alpha.
2154 * Richard Henderson contributed several Alpha optimized assembler function
2155 for arithmetic and string handling.
2157 * Ulrich Drepper has contributed a new set of message catalog functions to
2158 support multiple languages using the <libintl.h> interface, for use with
2159 his new package GNU gettext. Translation volunteers have contributed
2160 catalogs of the library's messages in Spanish, German, and Korean.
2162 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2163 program and the `catgets' function for reading the catalog files it
2164 creates. (The <libintl.h> interface is preferred; we include the
2165 <nl_types.h> interface using `catgets' only for source compatibility with
2166 programs already written to use it.)
2168 * New header file <values.h> gives SVID-compatible names for <limits.h>
2171 * Various new macros, declarations, and small header files for compatibility
2174 * New function `group_member' is a convenient way to check if a process has
2175 a given effective group ID.
2177 * When using GCC 2.7 and later, the socket functions are now declared in a
2178 special way so that passing an argument of type `struct sockaddr_in *',
2179 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2180 `struct sockaddr *' type, does not generate a type-clash warning.
2182 * New function `error' declared in header file <error.h> is a convenient
2183 function for printing error messages and optionally exiting; this is the
2184 canonical function used in GNU programs. The new functions `err', `warn',
2185 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2186 doing the same thing.
2188 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2189 POSIX.2 `glob' function to do ~ and {...} expansion.
2191 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2192 `clearenv' which is used in POSIX.9 is also available.
2194 * New function `getsid' returns session ID number on systems that support it.
2196 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2197 files <db.h> and <mpool.h> provide a rich set of functions for several
2198 types of simple databases stored in memory and in files, and <ndbm.h> is
2199 an old `ndbm'-compatible interface using the `db' functions. Link with
2200 `-ldb' to get these functions.
2202 * New macro `strdupa' copies a string like `strdup', but uses local stack
2203 space from `alloca' instead of dynamic heap space from `malloc'.
2205 * New function `strnlen' is like `strlen' but searches only a given maximum
2206 number of characters for the null terminator. `stpncpy', `strndup' and
2207 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2210 * New function `statfs' in header <sys/statfs.h>.
2212 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2213 provide convenient functions for operating on blocks of null-terminated
2216 * A new suite of functions in <utmp.h> handle all the details of reading
2217 and writing the utmp file.
2219 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2222 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2223 completely POSIX compliant and also implemented the extended functionality
2224 to handle alternate digit representation and alternate era date formats.
2226 * Ulrich Drepper provided an implementation of the `strptime' function
2227 defined in XPG4.2 which transforms a string into a `struct tm' value.
2229 * Paul Eggert provided the tzselect shell script as part of the timezone
2230 code. The shell script makes it easy to select the correct timezone
2233 * The implementation of the malloc family of functions is completely replaced
2234 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2235 The implementation uses the mmap function (if available) and it is
2236 optimized for the use in multi threaded programs.
2238 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2239 functions. This new functionality is usable by specifying a special
2240 salt string and it is compatible with implementation on *BSD systems.
2242 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2243 `getsubopt' to handle second level command line options, `bsd_signal'
2244 to access BSD style `signal' functionality, the obsolete `regexp' style
2247 * the `lchown' function is available on system which support this
2250 * The implementation of the shadow password handling function was contributed
2253 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2255 * POSIX.1g support was added. The <sys/select.h> header is available,
2256 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2257 implementation of `getaddrinfo'.
2261 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2263 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2264 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2266 * The new function `daemon' from 4.4 BSD is useful for server programs that
2267 want to put themselves in the background.
2269 * Joel Sherrill has contributed support for several standalone boards that
2270 run without an operating system.
2272 * `printf', `scanf' and friends now accept a `q' type modifier for long
2273 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2275 * All of the code taken from BSD (notably most of the math and networking
2276 routines) has been updated from the BSD 4.4-Lite release.
2278 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2280 * The new functions `getdomainname' and `setdomainname' fetch or change the
2281 YP/NIS domain name. These are system calls which exist on systems which
2284 * The time zone data files have been updated for the latest international
2287 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2288 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2292 * The C library now includes support for Sun RPC, from Sun's free
2293 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2294 are included. (There is still no support for YP.)
2296 * Tom Quinn has contributed a port of the C library to SGI machines running
2297 Irix 4 (mips-sgi-irix4).
2299 * The new `lockf' function is a simplified interface to the locking
2300 facilities of `fcntl', included for compatibility.
2302 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2304 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2306 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2309 * The error message printed by `assert' for a failed assertion now includes
2310 the name of the program (if using GNU ld) and the name of the calling
2311 function (with versions of GCC that support this).
2313 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2315 * The library now includes the <sys/mman.h> header file and memory
2316 management functions `mmap', `munmap', `mprotect', `msync', and
2317 `madvise', on systems that support those facilities.
2319 * The interface for `mcheck' has changed slightly: the function called to
2320 abort the program when an allocation inconsistency is detected now takes
2321 an argument that indicates the type of failure. The new function
2322 `mprobe' lets you request a consistency check for a particular block at
2323 any time (checks are normally done only when you call `free' or `realloc'
2326 * It is now possible to easily cross-compile the C library, building on one
2327 system a library to run on another machine and/or operating system. All
2328 you need to do is set the variable `HOST_CC' in `configparms' to the
2329 native compiler for programs to run on the machine you are building on (a
2330 few generator programs are used on Unix systems); set `CC' to the
2333 * The new function `fexecve' (only implemented on the GNU system) executes
2334 a program file given a file descriptor already open on the file.
2338 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2339 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2341 * You can set the variable `libprefix' in `configparms' to specify a prefix
2342 to be prepended to installed library files; this makes it easy to install
2343 the GNU C library to be linked as `-lgnuc' or whatever.
2345 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2346 copies a limited number of characters from a string, and returns the
2347 address of the last character written.
2349 * You no longer need to check for whether the installed `stddef.h' is
2350 compatible with the GNU C library. configure now checks for you.
2352 * You can now define a per-stream `fileno' function to convert the
2353 stream's cookie into an integral file descriptor.
2355 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2356 allocates zero bytes of storage, and returns a unique pointer which
2357 you can pass to `realloc' or `free'. The behavior is undefined if
2358 you dereference this pointer.
2360 * The C library now runs on Sony NEWS m68k machines running either
2361 NewsOS 3 or NewsOS 4.
2363 * The new `syscall' function is a system-dependent primitive function
2364 for invoking system calls. It has the canonical behavior on Unix
2365 systems, including unreliable return values for some calls (such as
2366 `pipe', `fork' and `getppid').
2368 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2369 to `EAGAIN', which is the preferred name. On systems whose kernels
2370 use two distinct codes, the C library now translates EWOULDBLOCK to
2371 EAGAIN in every system call function.
2375 * The GNU C Library Reference Manual is now distributed with the library.
2376 `make dvi' will produce a DVI file of the printed manual.
2377 `make info' will produce Info files that you can read on line using C-h i
2378 in Emacs or the `info' program.
2379 Please send comments on the manual to bug-glibc-manual@gnu.org.
2381 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2383 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2385 * Jason Merrill has contributed a port to the Sequent Symmetry running
2386 Dynix version 3 (i386-sequent-dynix).
2388 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2389 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2391 * New function `memory_warnings' lets you arrange to get warnings when
2392 malloc is running out of memory to allocate, like Emacs gives you.
2394 * The C library now contains the relocating allocator used in Emacs 19 for
2395 its editing buffers. This allocator (ralloc) minimizes allocation
2396 overhead and fragmentation by moving allocated regions around whenever it
2397 needs to. You always refer to a ralloc'd region with a "handle" (a
2398 pointer to a pointer--an object of type `void **').
2400 * There is a new `printf' format: `%m' gives you the string corresponding
2401 to the error code in `errno'.
2403 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2404 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2405 pass, the `a' modifier says to fill in a `char **' you pass with a
2408 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2409 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2410 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2412 * `mkstemp' is a traditional Unix function to atomically create and open a
2413 uniquely-named temporary file.
2417 * The standard location for the file that says what the local timezone is
2418 has changed again. It is now `/usr/local/etc/localtime' (or more
2419 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2421 * The distribution no longer contains any files with names longer than 14
2424 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2425 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2427 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2431 * The configuration process has changed quite a bit. The `configure'
2432 script is now used just like the configuration scripts for other GNU
2433 packages. The `sysdeps' directory hierarchy is much rearranged.
2434 The file `INSTALL' explains the new scheme in detail.
2436 * The header files no longer need to be processed into ANSI C and
2437 traditional C versions. There is just one set of files to install, and
2438 it will work with ANSI or old C compilers (including `gcc -traditional').
2440 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2441 MIPS DECStation running Ultrix 4.
2443 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2444 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2445 made itself into a shared library.
2447 * Yet further improved support for the i386, running 4.3 BSD-like systems
2448 (such as Mach 3 with the Unix single-server), or System V.
2450 * New function `strncasecmp' to do case-insensitive string comparison
2451 with limited length.
2453 * New function `strsep' is a reentrant alternative to `strtok'.
2455 * New functions `scandir' and `alphasort' for searching directories.
2457 * New function `setenv' is a better interface to `putenv'.
2459 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2460 function for traversing a directory tree.
2462 * The GNU obstack package is now also part of the C library.
2463 The new function `open_obstack_stream' creates a stdio stream that
2464 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2465 formatted output directly to an obstack.
2467 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2468 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2470 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2472 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2473 things to your strings.
2475 * There are some new test programs: test-fseek, testmb, and testrand.
2477 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2478 These ports are not finished, but are a good starting place for really
2479 supporting those systems.
2481 * `/etc/localtime' is now the standard location for the file that says what
2482 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2483 This follows the general principle that `/etc' is the place for all local
2484 configuration files.
2486 * The C library header files now use `extern "C"' when used by the C++
2487 compiler, so the C library should now work with C++ code.
2489 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2490 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2493 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2494 function which uses the `merge sort' algorithm, and is said to be
2495 significantly faster than the old GNU `qsort' function. Merge sort is
2496 now the standard `qsort' function. The new algorithm can require a lot
2497 of temporary storage; so, the old sorting function is called when the
2498 required storage is not available.
2500 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2501 provides the Unix `crypt' function, plus some other entry points.
2503 * The code and header files taken from 4.4 BSD have been updated with the
2504 latest files released from Berkeley.
2506 ----------------------------------------------------------------------
2507 Copyright information:
2509 Copyright (C) 1992-2014 Free Software Foundation, Inc.
2511 Permission is granted to anyone to make or distribute verbatim copies
2512 of this document as received, in any medium, provided that the
2513 copyright notice and this permission notice are preserved,
2514 thus giving the recipient permission to redistribute in turn.
2516 Permission is granted to distribute modified versions
2517 of this document, or of portions of it,
2518 under the above conditions, provided also that they
2519 carry prominent notices stating who last changed them.
2522 version-control: never