1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2013 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:
12 156, 431, 832, 2801, 10278, 13028, 13982, 13985, 14029, 14155, 14547,
13 14699, 14876, 14910, 15048, 15218, 15277, 15308, 15362, 15400, 15427,
14 15522, 15531, 15532, 15608, 15609, 15610, 15632, 15640, 15670, 15672,
15 15680, 15681, 15723, 15734, 15735, 15736, 15748, 15749, 15754, 15760,
16 15764, 15797, 15825, 15844, 15847, 15849, 15855, 15856, 15857, 15859,
17 15867, 15886, 15887, 15890, 15892, 15893, 15895, 15897, 15905, 15909,
18 15919, 15921, 15923, 15939, 15948, 15963, 15966, 15988, 16032, 16034,
19 16036, 16041, 16072, 16074.
21 * CVE-2012-4412 The strcoll implementation caches indices and rules for
22 large collation sequences to optimize multiple passes. This cache
23 computation may overflow for large collation sequences and may cause a
24 stack or buffer overflow. This is now fixed to use a slower algorithm
25 which does not use a cache if there is an integer overflow.
27 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
28 rules for large collation sequences to optimize multiple passes and falls
29 back to alloca if malloc fails, resulting in a possible stack overflow.
30 The implementation now falls back to an uncached collation sequence lookup
33 * CVE-2013-4788 The pointer guard used for pointer mangling was not
34 initialized for static applications resulting in the security feature
35 being disabled. The pointer guard is now correctly initialized to a
36 random value for static applications. Existing static applications need
37 to be recompiled to take advantage of the fix (bug 15754).
39 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
40 to the d_name member of struct dirent, or omit the terminating NUL
41 character. (Bugzilla #14699).
43 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
44 aligned_alloc functions could allocate too few bytes or corrupt the
45 heap when passed very large allocation size values (Bugzilla #15855,
48 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
49 for AF_INET6 has been fixed (Bugzilla #16072).
51 * New locales: ak_GH, cmn_TW, hak_TW, lzh_TW, nan_TW, quz_PE, pap_AW, pap_CW,
54 * Substantially revised locales: gd_GB, ht_HT
56 * The LC_ADDRESS field was updated to support country_car for almost all
59 * ISO 1427 definitions were updated.
61 * ISO 3166 definitions were updated.
63 * The localedef utility now supports --big-endian and --little-endian
64 command-line options to generate locales for a different system from that
65 for which the C library was built.
67 * Binary locale files now only depend on the endianness of the system for
68 which they are generated and not on other properties of that system. As a
69 consequence, binary files generated with new localedef may be incompatible
70 with old versions of the GNU C Library, and binary files generated with
71 old localedef may be incompatible with this version of the GNU C Library,
72 in the following circumstances:
74 + Locale files may be incompatible on m68k systems.
76 + Locale archive files (but not separate files for individual locales) may
77 be incompatible on systems where plain "char" is signed.
79 * The configure option --disable-versioning has been removed. Builds with
80 --disable-versioning had not worked for several years.
82 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
83 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
85 * SystemTap probes for malloc have been introduced.
87 * Support for powerpc64le has been added.
89 * The soft-float powerpc port now supports e500 processors.
93 * The following bugs are resolved with this release:
95 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
96 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
97 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
98 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
99 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
100 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
101 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
102 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
103 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
104 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
105 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
106 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
107 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
110 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
111 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
112 Distributions can re-enable building and using pt_chown via the new configure
113 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
114 considerable security risks and should only be used if the distribution
115 understands and accepts the risks.
117 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
120 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
121 fixed (Bugzilla #15330).
123 * Add support for calling C++11 thread_local object destructors on thread
124 and program exit. This needs compiler support for offloading C++11
125 destructor calls to glibc.
127 * Improved worst case performance of libm functions with double inputs and
130 * Support for priority inherited mutexes in pthread condition variables on
131 non-x86 architectures.
133 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
135 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
137 * Optimized string functions for ARM. Implemented by Will Newton and
140 * Optimized libm functions for SPARC. Implemented by David S. Miller.
142 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
145 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
146 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
148 * Added a benchmark framework to track performance of functions in glibc.
150 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
151 It is based on draft TS 18661 and currently enabled as a GNU extension.
153 * On Linux, the clock function now uses the clock_gettime system call
154 for improved precision, rather than old times system call.
156 * Added new API functions pthread_getattr_default_np and
157 pthread_setattr_default_np to get and set the default pthread
158 attributes of a process.
160 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
161 This may improve lock scaling of existing programs on TSX capable systems.
162 When the --enable-lock-elision=yes parameter is specified at configure
163 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
166 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
167 availability). Implemented by Ryan S. Arnold.
169 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
173 * The following bugs are resolved with this release:
175 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
176 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
177 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
178 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
179 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
180 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
181 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
182 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
183 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
184 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
185 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
186 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
187 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
188 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
189 14879, 14889, 14893, 14898, 14914.
191 * Optimization of memcpy for MIPS.
193 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
194 EMFILE has been fixed (Bugzilla #14889).
196 * The add-on ports collection is now distributed in the "ports" subdirectory
197 of the main GNU C Library distribution, rather than separately.
199 * Port to ARM AArch64 contributed by Linaro.
201 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
202 Optimized versions of memcpy, memset, and memcmp added for System z10 and
204 Implemented by Andreas Krebbel.
206 * The new function secure_getenv allows secure access to the environment,
207 returning NULL if running in a SUID/SGID process. This function replaces
208 the internal function __secure_getenv.
210 * SystemTap static probes have been added into the dynamic linker.
211 Implemented by Gary Benson.
213 * Optimizations of string functions strstr, strcasestr and memmem.
214 Implemented by Maxim Kuvyrkov.
216 * The minimum Linux kernel version that this version of the GNU C Library
217 can be used with is 2.6.16.
219 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
220 powerpc POWER7. Implemented by Will Schmidt.
222 * New configure option --disable-nscd builds the C library such that it
223 never attempts to contact the Name Service Caching Daemon (nscd).
224 New configure option --disable-build-nscd avoids building nscd itself;
225 this is the default if --disable-nscd is used.
227 * Improved support for cross-compilation, including cross-testing and
228 bootstrap builds without a previously built glibc.
230 * Several testsuite tests are now able to test multiple IFUNC variants of an
231 interface, rather than just testing the one that would be chooen by
234 * New configure options --with-bugurl and --with-pkgversion, for
235 distributors to use to embed their bug-reporting and package version
236 information in --help and --version output.
238 * The ttyname and ttyname_r functions on Linux now fall back to searching for
239 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
240 allows creation of chroots without the procfs mounted on /proc.
242 * The `crypt' function now fails if passed salt bytes that violate the
243 specification for those values. On Linux, the `crypt' function will
244 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
245 enabled, and fail on encrypted strings using the MD5 or DES algorithm
246 when the mode is enabled.
248 * The `clock_*' suite of functions (declared in <time.h>) is now available
249 directly in the main C library. Previously it was necessary to link with
250 -lrt to use these functions. This change has the effect that a
251 single-threaded program that uses a function such as `clock_gettime' (and
252 is not linked with -lrt) will no longer implicitly load the pthreads
253 library at runtime and so will not suffer the overheads associated with
254 multi-thread support in other code such as the C++ runtime library.
256 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
261 * The following bugs are resolved with this release:
263 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
264 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
265 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
266 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
267 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
268 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
269 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
270 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
271 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
272 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
273 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
274 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
275 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
276 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
277 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
278 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
279 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
280 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
281 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
282 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
283 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
284 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
287 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
288 configuring glibc with:
289 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
290 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
291 Implemented by H.J. Lu.
295 + define static_assert
297 + do not declare gets
299 + declare at_quick_exit and quick_exit also for ISO C11
301 + aligned_alloc. NB: The code is deliberately allows the size parameter
302 to not be a multiple of the alignment. This is a moronic requirement
303 in the standard but it is only a requirement on the caller, not the
308 + uchar.h support added
310 + CMPLX, CMPLXF, CMPLXL added
312 Implemented by Ulrich Drepper.
314 * Support for the IA-64 has been moved to ports.
316 * Remove support for anything but ELF binary format
318 * Checking versions of poll, ppoll added.
319 Implemented by Ulrich Drepper.
321 * More generic and 64-bit performance optimizations to math functions.
322 Implemented by Ulrich Drepper.
324 * New configure option --enable-obsolete-rpc makes the deprecated RPC
325 headers and functions available at compile time as they were before
326 version 2.14. This option will be removed at some time in the future
327 after the TI-RPC library becomes fully sufficient for the needs of
328 existing applications.
330 * Compatibility code for Linux kernel versions before 2.4 has been removed.
331 Note that glibc is not expected to work with any Linux kernel version
334 * New header <sys/auxv.h> and function getauxval allowing easy access to
335 the AT_* key-value pairs passed from the Linux kernel. The header also
336 defines the HWCAP_* bits associated with the AT_HWCAP key.
338 * New locales: mag_IN
340 * New configure option --enable-systemtap builds SystemTap static probes
341 into libc for setjmp and longjmp and into libpthread for various operations.
342 So far the setjmp/longjmp probes and some of the libpthread probes are
343 provided only for i*86 and x86_64.
344 Implemented by Roland McGrath and Rayson Ho.
346 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
348 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
351 * More optimized functions for SPARC. Implemented by David S. Miller.
353 * Improved support for cross-compilation, especially bootstrap builds
354 without a previously built glibc.
356 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
357 Chris Metcalf from Tilera.
359 * Support for the old ARM ABI has been removed from ports. Only the EABI is
360 now supported for ARM processors.
362 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
363 as the name of the dynamic linker, to distinguish it from the
364 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
366 * Support for CRIS has been removed from ports.
368 * A new class of installed header has been documented for low-level
369 platform-specific functionality. PowerPC added the first instance with a
370 function to provide time base register access. Contributed by Tulio
371 Magno Quites Machado Filho.
373 * ix86 configurations now install header files that are consistent with
374 what x86-64 configurations install. These same header files can be used
375 for -m32, -m64, or -mx32 builds.
376 Contributed by H.J. Lu.
378 * Math library bug fixes. A thorough audit of all open math library bugs was
379 conducted by Joseph Myers. Significant progress was made on many math
380 library bugs resulting in more accurate exceptions and function results.
381 Many thanks to all those that contributed including Andreas Jaeger for his
382 patch review and work on the x87 trigonometric instruction issues.
384 * Timezone data is no longer installed. Timezone-related binaries and scripts
385 will continue to be installed. Users should obtain their timezone data from
386 their distribution provider or from the tzdata package at
387 <ftp://munnari.oz.au/pub/>.
391 * The following bugs are resolved with this release:
393 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
394 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
395 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
396 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
397 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
398 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
399 13484, 13506, 13515, 13523, 13524, 13538, 13540
401 * New program pldd to list loaded object of a process
402 Implemented by Ulrich Drepper.
404 * Add nss_db support back to glibc. No more dependency on Berkeley db
405 and support for initgroups lookups.
406 Implemented by Ulrich Drepper.
408 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
409 Contributed by HJ Lu.
411 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
412 Contributed by HJ Lu.
414 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
415 on x86-32 and x86-64.
416 Contributed by Liubov Dmitrieva.
418 * Optimized strchr and strrchr for SSE on x86-32.
419 Contributed by Liubov Dmitrieva.
421 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
422 for x86-64 and x86-32.
423 Contributed by Liubov Dmitrieva.
425 * New interfaces: scandirat, scandirat64
426 Implemented by Ulrich Drepper.
428 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
429 Implemented by Ulrich Drepper.
431 * nscd now also caches the netgroup database.
432 Implemented by Ulrich Drepper.
434 * Integrate libm with gcc's -ffinite-math-only option.
435 Implemented by Ulrich Drepper.
437 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
438 to math functions. Implemented by Ulrich Drepper.
440 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
441 Implemented by Ulrich Drepper.
443 * New Linux interfaces: process_vm_readv, process_vm_writev
445 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
446 Implemented by Ulrich Drepper.
448 * Optimized nearbyint and strcasecmp for PPC.
449 Implemented by Adhemerval Zanella.
451 * New locales: bho_IN, unm_US, es_CU, ta_LK
455 * The following bugs are resolved with this release:
457 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
458 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
459 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
460 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
461 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
462 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
463 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
464 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
465 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
466 12795, 12811, 12813, 12814, 12841
468 * The RPC implementation in libc is obsoleted. Old programs keep working
469 but new programs cannot be linked with the routines in libc anymore.
470 Programs in need of RPC functionality must be linked against TI-RPC.
471 The TI-RPC implementation is IPv6 enabled and there are other benefits.
473 Visible changes of this change include (obviously) the inability to link
474 programs using RPC functions without referencing the TI-RPC library and the
475 removal of the RPC headers from the glibc headers.
476 Implemented by Ulrich Drepper.
478 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
479 syncfs, setns, sendmmsg
481 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
482 yue_HK, lij_IT, mhr_RU
484 * New encodings: CP770, CP771, CP772, CP773, CP774
486 * New program sotruss to trace calls through PLTs
487 Implemented by Ulrich Drepper.
489 * The malloc hook implementation is marked deprecated and will be removed
490 from the default implementation in the next version. The design never
491 worked ever since the introduction of threads. Even programs which do
492 not create threads themselves can use multiple threads created internally.
496 * The following bugs are resolved with this release:
498 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
499 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
500 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
501 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
504 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
506 * POWER7 optimizations: memset, memcmp, strncmp
508 * New optimized string functions for x86-64: strnlen (SSE2),
509 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
510 Implemented by Ulrich Drepper.
514 * The following bugs are resolved with this release:
516 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
517 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
518 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
519 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
520 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
521 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
522 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
523 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
525 * New interfaces: pthread_getname_np, pthread_setname_np
527 * New Linux interface: recvmmsg
529 * STT_GNU_IFUNC implemented for Sparc by David Miller.
531 * The dynamic linker now recognizes supported ABI versions from the
532 EI_ABIVERSION field in the ELF header.
533 Implemented by Ulrich Drepper.
535 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
536 will not be used to fill in password fields in the passwd.byname replies.
537 Instead it is used to synthesize the shadow.byname table, should it be
538 missing. This is a useful mode in some installations involving Solaris.
539 Implemented by Ulrich Drepper.
541 * New locales: kok_IN, sq_MK, cv_RU
545 * The following bugs are resolved with this release:
547 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
548 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
549 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
550 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
551 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
552 10789, 10817, 10823, 10840, 10847
554 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
556 Implemented by Ulrich Drepper.
558 * Checking version of longjmp added that fails if an uninitialized stack
559 frame would be created. Implemented by Ulrich Drepper.
561 * STT_GNU_IFUNC is now supported in static executables.
562 Implemented by H.J. Lu.
564 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
566 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
567 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
568 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
569 Contributed by H.J. Lu.
571 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
572 Implemented by Ulrich Drepper.
574 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
576 Contributed by H.J. Lu.
578 * Support for fma instruction in AVX on x86-64.
579 Implemented by H.J. Lu and Ulrich Drepper.
581 * AVX support in x86-64 auditing support in ld.so.
582 Implemented by H.J. Lu.
584 * STB_GNU_UNIQUE support added.
585 Implemented by Ulrich Drepper.
587 * Implement second fallback mode for optimized DNS lookup for even more
588 broken environments. If two requests from the same port are not
589 handled correctly close the socket and open a new one before sending
590 the second request. The 'single-request-reopen' option in /etc/resolv.conf
591 can be used to select this mode right away, instead of rediscovering the
592 necessity is every process again.
593 Implemented by Ulrich Drepper.
595 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
596 Implemented by Adam Tkac.
598 * Optimized iconv conversions for S390x.
599 Implemented by Andreas Krebbel.
601 * Using condvars with PI mutexes is now more efficient due to kernel
602 support for requeueing to PI futexes. NPTL support added for x86-64.
603 Implemented by Ulrich Drepper.
605 * New locales: ps_AF, my_MM
609 * The following bugs are resolved with this release:
611 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
612 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
613 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
614 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
615 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
617 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
618 Implemented by Ulrich Drepper.
620 * New Linux interfaces: accept4, fallocate, fallocate64.
621 Implemented by Ulrich Drepper.
623 * Correct declarations of string function when used in C++ code. This
624 could lead to compile errors for invalid C++ code.
626 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
629 * New POSIX 2008 interface: psiginfo
630 Implemented by Ulrich Drepper.
632 * New ISO C++1x interfaces: quick_exit, at_quick_exit
633 Implemented by Ulrich Drepper.
635 * Support for selecting between multiple function definitions at runtime
636 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
638 * The libcrypt library can now use the hash function implementations in
639 NSS. Implemented by Ulrich Drepper.
641 * The malloc implementation can be compiled to be less memory efficient
642 but higher performing in multi-threaded programs.
643 Implemented by Ulrich Drepper.
645 * New locales: nan_TW@latin, ks_IN
647 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
648 Implemented by Ulrich Drepper.
650 * Extended printf hook support. It is possible to use user-defined types
651 and extend existing format specifiers.
652 Implemented by Ulrich Drepper.
654 * Handling for group shadow files has been added.
655 Implemented by Ulrich Drepper.
657 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
658 servers (the case, e.g., for some people using the built-in DNS
659 server in ADSL modems/routers). There is a once-per-process timeout
660 in case of a broken server. To avoid it, users can run nscd or put
661 'options single-request' in /etc/resolv.conf.
662 Implemented by Ulrich Drepper.
666 * The following bugs are resolved with this release:
668 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
669 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
670 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
671 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
672 6968, 6974, 6980, 6995, 7008, 7009, 7029
674 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
675 up at the same time. Implemented by Ulrich Drepper.
677 * TLS descriptors for LD and GD on x86 and x86-64.
678 Implemented by Alexandre Oliva.
680 * getaddrinfo now handles DCCP and UDPlite.
681 Implemented by Ulrich Drepper.
683 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
684 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
685 Implemented by Ulrich Drepper.
687 * New implementation of memmem, strstr, and strcasestr which is O(n).
688 Implemented by Eric Blake.
690 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
692 * Implement "e" option for popen to open file descriptor with the
693 close-on-exec flag set. Implemented by Ulrich Drepper.
695 * Implement "b" mode for fmemopen. In this mode writes writes don't
696 implicitly add a NUL byte and seeks from the end of the buffer really
697 use the buffer end, not the string length as the basis.
698 Implemented by Ulrich Drepper.
700 * Many functions, exported and internal, now atomically set the close-on-exec
701 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
703 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
705 Implemented by Pravin Satpute.
707 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
711 * The following bugs are resolved with this release:
713 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
714 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
715 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
716 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
717 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
718 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
719 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
721 * New locales: bo_CN, bo_IN, shs_CA.
723 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
725 * Sorting rules for some Indian languages (Devanagari and Gujarati).
726 Implemented by Pravin Satpute.
728 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
730 * nscd caches now all timeouts for DNS entries
731 Implemented by Ulrich Drepper.
733 * nscd is more efficient and wakes up less often.
734 Implemented by Ulrich Drepper.
736 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
737 vdprintf, and obstack_vprintf.
738 Implemented by Jakub Jelinek.
740 * Faster memset for x86-64.
741 Implemented by Harsha Jagasia and H.J. Lu.
743 * Faster memcpy on x86.
744 Implemented by Ulrich Drepper.
746 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
747 Implemented by Ulrich Drepper.
749 * Faster sqrt and sqrtf implemention for some PPC variants.
750 Implemented by Steven Munroe.
754 * The following bugs are resolved with this release:
756 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
757 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
758 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
759 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
760 5071, 5103, 5104, 5112, 5113, 5184, 5186
762 * More checking functions: fread, fread_unlocked, open*, mq_open.
763 Implemented by Jakub Jelinek and Ulrich Drepper.
765 * Extend fortification to C++. Implemented by Jakub Jelinek.
767 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
768 by not recognizing 'a' as a modifier when those specs are requested.
769 Implemented by Jakub Jelinek.
771 * PPC optimizations to math and string functions.
772 Implemented by Steven Munroe.
774 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
775 options to be passed. Implemented by Ulrich Drepper.
777 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
779 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
780 Implemented by Ulrich Drepper.
782 * Handle private futexes in the NPTL implementation.
783 Implemented by Jakub Jelinek and Ulrich Drepper.
785 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
786 Implemented by Roland McGrath and Ulrich Drepper.
788 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
790 * SHA-256 and SHA-512 based password encryption.
791 Implemented by Ulrich Drepper.
793 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
794 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
797 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
798 Implemented by Ulrich Drepper.
802 * The following bugs are resolved with this release:
804 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
805 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
806 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
807 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
808 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
809 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
810 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
813 * New Linux interfaces: epoll_pwait, sched_getcpu.
815 * New generic interfaces: strerror_l.
817 * nscd can now cache the services database. Implemented by Ulrich Drepper.
821 * The following bugs are resolved with this release:
823 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
824 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
825 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
826 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
827 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
828 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
829 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
830 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
831 3225, 3251, 3252, 3253, 3273
833 * For Linux, the sorting of addresses returned by getaddrinfo now also
834 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
835 Implemented by Ulrich Drepper.
837 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
838 Implemented by Ulrich Drepper.
840 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
842 * New iconv module for MIK. Contributed by Alexander Shopov.
844 * For sites with broken group and/or passwd database, the auto-propagate
845 option of nscd can prevent creating ID lookup entries from the results
846 of a name lookup and vice versa. This usually is no problem but some
847 site might have problems with the default behavior.
848 Implemented by Ulrich Drepper.
850 * Iterating over entire database in NIS can be slow. With the
851 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
852 to trade time for memory. The entire database will be read at once.
853 Implemented by Ulrich Drepper.
855 * The interfaces introduced in RFC 3542 have been implemented by
858 * Support for the new ELF hash table format was added by Ulrich Drepper.
860 * Support for priority inheritance mutexes added by Jakub Jelinek and
863 * Support for priority protected mutexes added by Jakub Jelinek.
865 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
866 or_IN, csb_PL, fy_NL, sr_ME.
870 * More overflow detection functions.
872 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
873 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
875 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
876 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
877 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
878 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
879 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
880 by Masahide Washizawa.
882 * It is now possible to install audit libraries for the dynamic linker using
883 LD_AUDIT. Implemented by Ulrich Drepper.
885 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
886 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
887 For a libc and libpthread that works well on Linux 2.4 kernels, we
888 recommend using the stable 2.3 branch.
890 * The new function open_wmemstream acts like open_memstream,
891 but uses a wchar_t wide character buffer.
893 * The new function ppoll is an improved version of poll, similar to pselect.
895 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
896 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
897 renameat, unlinkat, linkat, symlinkat, readlinkat.
899 * New Linux kernel system calls: unshare,
900 inotify_init, inotify_add_watch, inotify_rm_watch.
902 * The euidaccess function is now also known by the alias eaccess,
903 for compatibility with some other systems.
905 * Timezone data updated to 2006b version.
909 * The following bugs are resolved with this release:
911 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
912 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
913 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
914 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
915 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
916 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
918 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
920 * As of this release, GCC 4 can be used to compile the C Library.
922 * Timezone data updated to 2005m version.
926 * The following bugs are resolved with this release:
928 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
929 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
930 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
931 777, 787, 821, 822, 823, 825
933 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
937 * Support for RFC 3678. Real implementations exist only for Linux so far.
938 Implemented by Ulrich Drepper.
940 * nscd can now cache entries persistently. Expiring entries are reloaded.
941 For speedups the cache can be shared in memory with client processes.
942 Implemented by Ulrich Drepper.
944 * nscd can now perform SELinux checks.
945 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
947 * getaddrinfo queries are now cached. Canonical name lookup is performed
949 Implemented by Ulrich Drepper.
951 * The nothrow function attribute is used when headers are used by gcc when
952 compiling C code. This can avoid significant amounts of exception
955 * The malloc functions perform more error checking and are stricter when
956 it comes to reacting on errors. The default action is to terminate
957 the process after showing an error message. Implemented by Ulrich Drepper.
959 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
960 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
962 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
963 namespaces using the new function dlmopen(). This feature is of course,
964 like most other dynamic loading functionality, not available in statically
965 linked applications. Implemented by Ulrich Drepper.
967 * Low-overhead boundary checking variants of string and some stdio functions
968 were added. These are to be used in conjunction with a gcc patch by
969 Jakub Jelinek which adds calls to these functions if possible.
970 Implemented by Jakub Jelinek and Ulrich Drepper.
972 * Old code for several operating systems and machine architectures that
973 have not been in working condition in a long time have been removed from
974 the main source tree maintained by the GNU C Library's maintainers.
975 These files are now reside in the separate `ports' source module
976 that is usable as an add-on when building the library.
980 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
981 interrogate the dynamic linker, compatible with the Solaris interface.
983 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
984 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
986 * getifaddrs now uses the netlink interface on Linux to get its information.
987 Implemented by Thorsten Kukuk.
989 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
990 Implemented by Ulrich Drepper.
992 * support for non-executable stacks on x86 has been added. Changes mostly
995 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
998 * getaddrinfo now performs destination address selection according to
1003 * Thread-safe interfaces for many functions that access locale data
1004 were added in version 2.3, but these features were omitted from NEWS.
1005 Many functions have variants with an `_l' suffix that take a `locale_t'
1006 object as a parameter rather than consulting the current locale.
1007 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1008 create and maintain `locale_t' objects. Additionally, the new function
1009 `uselocale' sets "the current locale" (as used by functions not so
1010 parameterized) set for an individual thread. These features were added
1011 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1013 * The functions getresuid, getresgid, setresuid, and setresgid, which
1014 have long been available on Linux, are now declared in <unistd.h>
1015 and are now also available on the Hurd.
1017 * ELF thread-local storage support (TLS) now works on x86-64.
1019 * The new dynamic string token $LIB is expanded in shared library names.
1020 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1022 * Aldy Hernandez contributed complete software floating point support for
1023 PowerPC machines with no FPU.
1025 * fexecve is implemented on Linux.
1027 * The `btowc' function should work at least twice as fast due to
1028 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1030 * With approriate thread add-ons cancelable functions are now implemented
1031 in libc.so as well. No need to call the function in libpthread. This
1032 change allowed to finally disable the incorrect and expensive handling
1033 of weak definition in ld.so.
1035 * Yet more PLT entries in libc.so have been removed. We finally arrived
1036 at the bare minimum. Startup times improved appropriately.
1038 * Support for the new Linux/x86 system call interface was added. The
1039 AT_SYSINFO auxiliary vector entry is recognized and handled.
1043 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1046 * iconv (the program and the interface) now accepts empty names (excluding
1047 options like //TRANSLIT) to mean "use charset of current locale".
1049 * localedef can now transliterate characters in strings which are not in
1050 the provided charmap. The information from the input locale is used.
1052 * Prelinking support was added for ELF targets. This requires additional
1053 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1055 * Read-only stdio streams now use mmap to speed up operation by eliminating
1056 copying and buffer underflows. To use add 'm' to the mode string of
1057 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1059 * The malloc functions were completely rewritten by Wolfram Gloger based
1060 on Doug Lea's malloc-2.7.0.c.
1062 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1063 implementation of regex.
1065 * Bruno Haible upgraded the iconv and locale implementation to support
1068 * Contents of the LC_* and LANG environment variables in the CEN style are
1069 not recognized anymore. It never was used. Change by Ulrich Drepper.
1071 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1072 thread-local storage (TLS) ABI on some platforms.
1073 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1075 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1076 EUC-JISX0213, and TSCII.
1078 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1079 BSD-compatible interface for getting all network interface addresses.
1080 Implementation for IPv4 by Roland McGrath.
1082 * Loading of locale data is faster due to the introduction of a locale
1083 archive. Implemented by Roland McGrath and Ulrich Drepper.
1085 * Startup times are significantly reduced by not using exported functions
1086 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1089 * Steven Munroe contributed a port to PowerPC64/Linux.
1093 * The Hurd now uses the GNU libio implementation of stdio rather than the
1094 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1096 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1097 with the same behavior as the Linux system call of the same name.
1101 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1102 128-bit long double format.
1104 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1105 IBM1161, and IBM1162 charsets.
1107 * Andreas Jaeger contributed a port to x86-64/Linux.
1109 * Peter Bruin contributed a port to PowerPC/Hurd.
1111 * libc functions using I/O streams now can handle wide-oriented streams
1114 * optimizations in the dynamic linker. Binaries created by recent binutils
1115 versions start up quicker due to reduced time spent on relocations.
1117 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1121 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1122 asinh, atanh, j0 for the 128-bit long double format.
1124 * Bruno Haible updated all the code handling Unicode in some form to
1125 support Unicode 3.1.
1127 * Speed of regex for single-byte locales is back to previous levels.
1128 Patch by Isamu Hasegawa.
1130 * Alpha, SPARC, and IA-64 now also using floating stacks.
1132 * Startup time of internationalized applications greatly improved through
1133 iconv cache. Use iconvconfig to generate the cache file.
1134 Contributed by Ulrich Drepper.
1136 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1137 severe performance problems. Patch by David Mosberger.
1139 * The Hurd port got a lot more functionality like AIO, various stdio
1140 extensions, etc. Mainly done by Roland McGrath.
1142 * mtrace can now lookup symbols in shared libraries.
1146 * Intel's IA-64 math library is largely integrated. It provides fast and
1147 accurate implementatations for most basic and standard math functions
1148 in float, double, and long double format.
1150 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1151 and asin for the 96-bit long double format and asin, log, tan for the
1152 128-bit long double format.
1154 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1155 The basic double functions exist today. Contributed by Abraham Ziv
1156 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1157 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1159 * An asynchronous name lookup library was added. The interface is designed
1160 after POSIX AIO. The proposal was circulated beforehand to get comments.
1161 No negative ones came in. Implemented by Ulrich Drepper.
1163 * Port to S390/64bit contributed by Martin Schwidefsky
1164 <schwidefsky@de.ibm.com>.
1166 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1167 of functions for Linux/IA-64.
1169 * The RPC code is now thread safe. Threads can now use the same service
1170 of different services at the same time. Patch by Eric Norum
1171 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1173 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1174 family of functions for Linux/S390.
1176 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1177 of functions for Linux/x86.
1179 * Port to Linux/CRIS contributed by Axis Communications.
1183 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1184 we can now check for namespace violations and missing declarations. The
1185 result is that almost all headers are now Unix-compliant (as defined in
1186 the upcoming XPG6). The negative side is that some programs might need
1187 corrections, too, if they depend on the incorrect form of the headers in
1188 previous versions which defined too many symbols and included too many
1191 * regex now handles multibyte character sets correctly.
1192 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1194 * iconv (the program) does now conform to the upcoming XPG6 and handles
1195 charmaps. Instead of the charset names the path of charmaps can be
1196 provided and the conversion happens based on this data.
1197 Contributed by Ulrich Drepper.
1199 * The locale program now provides detailed information about the installed
1204 only lists the names of the supported locales
1208 provides details such as country, language, and codeset name.
1209 Contributed by Ulrich Drepper.
1213 * The gencat program now parses the input file according to the charset
1214 selected by the LC_CTYPE category. This is important for stateful
1215 character sets. To make generating catalogs easier there is a way
1216 to overwrite the charset selected by the locale: before the first
1217 message or $ quote line the catalog can contain a line like
1219 $ codeset=ISO-8859-2
1221 to select the charset (ISO-8859-2 in this case).
1223 Implemented by Shinya Hanataka and Ulrich Drepper.
1225 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1226 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1227 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1229 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1230 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1232 * The LANGUAGE environment variable is now ignored unless the locale is
1233 changed from the default "C" locale.
1235 * The usual bug fixes.
1239 * Greg McGary added runtime support for bounds checking using gcc's
1240 new -fbounded-pointers option. ix86 target is complete. PowerPC
1243 * Thorsten Kukuk added secure mode support to nscd.
1245 * The Berkeley db libraries have been removed.
1247 Related, the nss_db module is now in a separate package since it
1248 obviously requires a database library being available.
1250 * Wide character I/O streams implemented by Ulrich Drepper.
1252 * Functions from the extended socket API added by Ulrich Drepper.
1254 * Functions feenableexcept and fedisableexcept to control the
1255 behaviour of individual exceptions have been added by Andreas Jaeger.
1257 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1259 * The resolver code has been updated from bind 8.2.3-T5B which supports
1260 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1263 This change could in some situations effect backward compatibility. Since
1264 now `_res' is a thread-local instead of a global variable, modifying it
1265 in one thread does not have any effect in other threads.
1267 The resolver library was also extended to allow IPv6 as the transport
1268 protocol for the requests. This work was done by Stig Venaas.
1270 * Compatibility code for K&R C compilers has been removed from the
1271 header files. A ISO C compiler is needed to use the library
1272 (conforming to either C89 or C99 standard).
1274 * Complete rewrite of the localedef program to support multibyte character
1275 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1276 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1277 Implemented by Ulrich Drepper.
1279 Bruno Haible significantly improved the generation and use of the data
1280 structures for the wide character tables.
1282 * Plural handling in gettext implemented by Ulrich Drepper.
1284 * The utmp daemon has been removed.
1286 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1288 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1291 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1293 * POSIX barriers implemented by Kaz Kylheku.
1295 * POSIX spawn function family implemented by Ulrich Drepper.
1297 * POSIX spinlocks are now available.
1299 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1301 * the configure option --enable-kernel=X.Y.Z allows to strip out
1302 compatibility for kernel versions before X.Y.Z. This is currently only
1303 implemented for Linux.
1305 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1306 field sin6_scope_id. This means that all programs using IPv6 should be
1307 recompiled. Don't expect binary compatibility with previous glibc
1310 * various conversion modules for IBM character sets contributed by
1313 * IA-64 port by Jes Sorensen and HJ Lu.
1327 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1329 * New xdr functions are added; some rpc functions are now 64bit clean.
1331 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1333 * Fixed known incompatibilities with glibc 2.0.
1335 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1337 * Optimized a number of functions (especially the ELF dynamic loader).
1339 * Update timezone data files.
1341 * lots of charmaps corrections
1343 * some new locale definitions and charmaps
1348 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1349 conform to POSIX member type requirements. Symbol versions have been
1350 adjusted as needed within the library, and for direct use by applications,
1351 but there is potential for problems if third-party libraries use
1352 struct timeval as part of their interface. This does not present
1353 a problem for X and other "essential" system libraries.
1355 * An additional locale model to support C++ Standard Library locale
1356 model and probably more was implemented by Ulrich Drepper.
1358 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1361 * Miles Bader provided the `argp' function family to support hierachical
1362 command line argument parsing, layered on top of getopt.
1364 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1366 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1369 * scanf recognizes the %a and %A format for scanning floating point numbers.
1371 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1372 information and interfaces for the available integer types.
1374 * about 130 new math functions were added to implement the ISO C9x math
1377 * the new header <complex.h> contains definitions of the complex math
1378 functions from ISO C 9X.
1380 * the new header <tgmath.h> defines generic macros to use complex or
1381 real valued functions.
1383 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1385 * Andreas Jaeger provided a test suite for the math library.
1387 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1389 * Ulrich Drepper added character set conversion functions (iconv).
1391 * Optimized string functions have been added.
1393 * The localedata addon is now part of glibc.
1395 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1397 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1398 daemon for NSS (nscd).
1400 Missing a better place here are some numbers on improvements. Under
1401 Linux 2.1.125 un-tar-ing the kernel sources takes
1405 using local files 12.19s 6.88s 22.91s
1407 using NIS 13.92s 8.91s 26.34s
1409 using NIS & nscd 10.37s 7.34s 25.30s
1411 using NIS+ 27.57s 30.37s 640.46s
1413 using NIS+ & nscd 10.25s 7.83s 26.51s
1415 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1417 Keep in mind that non-namelookup related operations dominate above times.
1418 It was just a common complain that using NIS+ unpacking the kernel is
1421 [1] The old nscd implementation is not available anymore since it was
1422 distributed with glibc up to version 2.0.98 and thus is now replaced.
1424 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1426 * Mark Kettenis provided a Hesiod NSS module.
1428 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1429 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1431 * rcmd can now handle netgroups (Dick Streefland).
1433 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1436 * Support for the IPv6 protocol has been added to the socket API, as per the
1437 latest draft standards.
1439 * Support for Linux 2.2 has been added.
1441 * Interface changes relative to the latest 2.0.x release:
1442 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1443 addseverity NEW: Unix98
1444 alphasort64 NEW: LFS
1445 argp_err_exit_status NEW: argp, GNU ext
1446 argp_error NEW: argp, GNU ext
1447 argp_failure NEW: argp, GNU ext
1448 argp_help NEW: argp, GNU ext
1449 argp_parse NEW: argp, GNU ext
1450 argp_program_bug_address NEW: argp, GNU ext
1451 argp_program_version NEW: argp, GNU ext
1452 argp_program_version_hook NEW: argp, GNU ext
1453 argp_state_help NEW: argp, GNU ext
1454 argp_usage NEW: argp, GNU ext
1455 authdes_create NEW: Secure RPC
1456 authdes_getucred NEW: Secure RPC
1457 authdes_pk_create NEW: Secure RPC
1458 backtrace NEW: GNU ext.
1459 backtrace_symbols NEW: GNU ext.
1460 backtrace_symbols_fd NEW: GNU ext.
1462 cacosf NEW: ISO C 9x
1463 cacosh NEW: ISO C 9x
1464 cacoshf NEW: ISO C 9x
1465 cacoshl NEW: ISO C 9x
1466 cacosl NEW: ISO C 9x
1473 casinf NEW: ISO C 9x
1474 casinh NEW: ISO C 9x
1475 casinhf NEW: ISO C 9x
1476 casinhl NEW: ISO C 9x
1477 casinl NEW: ISO C 9x
1479 catanf NEW: ISO C 9x
1480 catanh NEW: ISO C 9x
1481 catanhf NEW: ISO C 9x
1482 catanhl NEW: ISO C 9x
1483 catanl NEW: ISO C 9x
1484 cbc_crypt NEW: Secure RPC
1488 ccoshf NEW: ISO C 9x
1489 ccoshl NEW: ISO C 9x
1495 cimagf NEW: ISO C 9x
1496 cimagl NEW: ISO C 9x
1497 clearerr_locked REMOVED
1498 clntunix_create NEW: sunrpc ext
1500 clog10 NEW: ISO C 9x
1501 clog10f NEW: ISO C 9x
1502 clog10l NEW: ISO C 9x
1512 cprojf NEW: ISO C 9x
1513 cprojl NEW: ISO C 9x
1515 crealf NEW: ISO C 9x
1516 creall NEW: ISO C 9x
1521 csinhf NEW: ISO C 9x
1522 csinhl NEW: ISO C 9x
1525 csqrtf NEW: ISO C 9x
1526 csqrtl NEW: ISO C 9x
1530 ctanhf NEW: ISO C 9x
1531 ctanhl NEW: ISO C 9x
1533 des_setparity NEW: Secure RPC
1534 ecb_crypt NEW: Secure RPC
1535 endutxent NEW: Unix98
1537 exp10f NEW: ISO C 9x
1538 exp10l NEW: ISO C 9x
1542 fattach NEW: STREAMS
1543 fdetach NEW: STREAMS
1547 feclearexcept NEW: ISO C 9x
1548 fegetenv NEW: ISO C 9x
1549 fegetexceptflag NEW: ISO C 9x
1550 fegetround NEW: ISO C 9x
1551 feholdexcept NEW: ISO C 9x
1553 feraiseexcept NEW: ISO C 9x
1554 ferror_locked REMOVED
1555 fesetenv NEW: ISO C 9x
1556 fesetexceptflag NEW: ISO C 9x
1557 fesetround NEW: ISO C 9x
1558 fetestexcept NEW: ISO C 9x
1559 feupdateenv NEW: ISO C 9x
1560 fflush_locked REMOVED
1564 fgets_unlocked NEW: GNU ext.
1565 fileno_locked REMOVED
1577 fputc_locked REMOVED
1578 fputs_unlocked NEW: GNU ext.
1579 fread_unlocked NEW: GNU ext.
1584 fstatvfs NEW: Unix98
1588 ftruncate64 NEW: LFS
1590 fwrite_unlocked NEW: GNU ext.
1591 gai_strerror NEW: IPv6
1595 getchar_locked REMOVED
1597 getdate_err NEW: Unix98
1598 getdate_r NEW: GNU ext.
1600 getnameinfo NEW: IPv6
1601 getnetname NEW: Secure RPC
1602 getpmsg NEW: STREAMS
1603 getpt NEW: Unix98 PTY
1604 getrlimit64 NEW: LFS
1605 getutxent NEW: Unix98
1606 getutxid NEW: Unix98
1607 getutxline NEW: Unix98
1608 glob64 NEW: GNU ext.
1609 globfree64 NEW: GNU ext.
1610 gnu_get_libc_release NEW: GNU ext.
1611 gnu_get_libc_version NEW: GNU ext.
1612 grantpt NEW: Unix98 PTY
1613 host2netname NEW: Secure RPC
1615 iconv_close NEW: iconv
1616 iconv_open NEW: iconv
1617 if_freenameindex NEW: IPv6
1618 if_indextoname NEW: IPv6
1619 if_nameindex NEW: IPv6
1620 if_nametoindex NEW: IPv6
1621 in6addr_any NEW: IPv6
1622 in6addr_loopback NEW: IPv6
1623 inet6_isipv4mapped NEW: IPv6
1624 isastream NEW: STREAMS
1625 iswblank NEW: GNU ext.
1626 key_decryptsession NEW: Secure RPC
1627 key_decryptsession_pk NEW: Secure RPC
1628 key_encryptsession NEW: Secure RPC
1629 key_encryptsession_pk NEW: Secure RPC
1630 key_gendes NEW: Secure RPC
1631 key_get_conv NEW: Secure RPC
1632 key_secretkey_is_set NEW: Secure RPC
1633 key_setnet NEW: Secure RPC
1634 key_setsecret NEW: Secure RPC
1635 llrint NEW: ISO C 9x
1636 llrintf NEW: ISO C 9x
1637 llrintl NEW: ISO C 9x
1638 llround NEW: ISO C 9x
1639 llroundf NEW: ISO C 9x
1640 llroundl NEW: ISO C 9x
1645 lrintf NEW: ISO C 9x
1646 lrintl NEW: ISO C 9x
1647 lround NEW: ISO C 9x
1648 lroundf NEW: ISO C 9x
1649 lroundl NEW: ISO C 9x
1651 makecontext NEW: Unix98
1652 mempcpy NEW: GNU ext.
1655 modify_ldt NEW: kernel
1659 nearbyint NEW: ISO C 9x
1660 nearbyintf NEW: ISO C 9x
1661 nearbyintl NEW: ISO C 9x
1662 netname2host NEW: Secure RPC
1663 netname2user NEW: Secure RPC
1664 nexttoward NEW: ISO C 9x
1665 nexttowardf NEW: ISO C 9x
1666 nexttowardl NEW: ISO C 9x
1670 passwd2des NEW: Secure RPC
1672 pow10f NEW: GNU ext.
1673 pow10l NEW: GNU ext.
1676 printf_size NEW: GNU ext.
1677 printf_size_info NEW: GNU ext.
1678 profil_counter REMOVED
1679 pthread_mutexattr_getkind_np REPLACED
1680 pthread_mutexattr_setkind_np REPLACED
1681 ptsname NEW: Unix98 PTY
1682 ptsname_r NEW: Unix98 PTY
1684 putchar_locked REMOVED
1685 putgrent NEW: GNU ext.
1687 putpmsg NEW: STREAMS
1688 pututxline NEW: Unix98
1692 readdir64_r NEW: LFS
1693 remquo NEW: ISO C 9x
1694 remquof NEW: ISO C 9x
1695 remquol NEW: ISO C 9x
1697 roundf NEW: ISO C 9x
1698 roundl NEW: ISO C 9x
1700 scalbln NEW: ISO C 9x
1701 scalblnf NEW: ISO C 9x
1702 scalblnl NEW: ISO C 9x
1704 sendfile NEW: kernel
1705 setcontext NEW: Unix98
1706 setrlimit64 NEW: LFS
1707 setutxent NEW: Unix98
1709 sigignore NEW: Unix98
1710 sigqueue NEW: POSIX.1b
1711 sigrelse NEW: Unix98
1712 sigset NEW: POSIX.1b
1713 sigtimedwait NEW: POSIX.1b
1714 sigwaitinfo NEW: POSIX.1b
1715 sincos NEW: GNU ext.
1716 sincosf NEW: GNU ext.
1717 sincosl NEW: GNU ext.
1721 strcasestr NEW: GNU ext.
1722 strtoimax NEW: ISO C 9x
1723 strtoumax NEW: ISO C 9x
1724 strverscmp NEW: GNU ext.
1725 svcauthdes_stats NEW: Secure RPC
1726 svcunix_create NEW: sunrpc etx
1727 svcunixfd_create NEW: sunrpc ext
1728 swapcontext NEW: Unix98
1729 tcgetsid NEW: Unix98 PTY
1730 tdestroy NEW: GNU ext.
1731 tgamma NEW: ISO C 9x
1732 tgammaf NEW: ISO C 9x
1733 tgammal NEW: ISO C 9x
1737 truncf NEW: ISO C 9x
1738 truncl NEW: ISO C 9x
1740 unlockpt NEW: Unix98 PTY
1741 updwtmpx NEW: Unix98
1742 user2netname NEW: Secure RPC
1743 utmpxname NEW: Unix98
1744 versionsort NEW: GNU ext.
1745 versionsort64 NEW: GNU ext.
1747 wcscasecmp NEW: GNU ext.
1748 wcsncasecmp NEW: GNU ext.
1749 wcsnlen NEW: GNU ext.
1750 wcstoimax NEW: ISO C 9x
1751 wcstoll NEW: ISO C 9x
1752 wcstoull NEW: ISO C 9x
1753 wcstoumax NEW: ISO C 9x
1755 wordexp NEW: POSIX.2
1756 wordfree NEW: POSIX.2
1757 write_profiling REMOVED
1758 xdecrypt NEW: Secure RPC
1759 xdr_authdes_cred NEW: Secure RPC
1760 xdr_authdes_verf NEW: Secure RPC
1761 xdr_cryptkeyarg NEW: Secure RPC
1762 xdr_cryptkeyarg2 NEW: Secure RPC
1763 xdr_cryptkeyres NEW: Secure RPC
1764 xdr_getcredres NEW: Secure RPC
1765 xdr_key_netstarg NEW: Secure RPC
1766 xdr_key_netstres NEW: Secure RPC
1767 xdr_keybuf NEW: Secure RPC
1768 xdr_keystatus NEW: Secure RPC
1769 xdr_netnamestr NEW: Secure RPC
1770 xdr_sizeof NEW: Secure RPC
1771 xdr_unixcred NEW: sunrpc ext
1772 xencrypt NEW: Secure RPC
1773 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1784 * inet_ntoa is thread-safe
1786 * updwtmp is moved from libutil to libc
1788 * rewrite of cbrt function
1790 * update of timezone data
1804 * add atoll function
1806 * fix complex problems in Berkeley DB code
1808 * fix math functions
1812 * fixed lots of header problems (especially Linux/GNU specific)
1814 * dynamic loader preserves all registers
1816 * Roland McGrath provided support for handling of auxiliary objects in
1817 the ELF dynamic loader.
1819 * support for parallel builds is improved
1823 * GNU extensions are no longer declared by default. To enable them you
1824 must define the macro `_GNU_SOURCE' in your program or compile with
1827 * The library has changed from using GNU ld symbol aliases to using weak
1828 symbols where available. The ELF object file format supports weak
1829 symbols; GNU ld also supports weak symbols in the a.out format. (There
1830 is also now support for other GNU ld extensions in ELF. Use the
1831 `--with-elf' option to configure to indicate you have ELF, and
1832 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1833 of many files which contained only symbol aliases, reducing the size of
1834 the source and the compiled library; many other files were renamed to
1835 less cryptic names previously occupied by the symbol alias files.
1836 There is a new header file <elf.h> for programs which operate on
1837 files in the ELF format.
1839 * Converted to Autoconf version 2, so `configure' has more options.
1840 Run `configure --help' to see the details.
1842 * The library can now be configured to build profiling, highly-optimized
1843 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1844 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1845 `configure' enable building these extra libraries. The shared library is
1846 built by default when using both ELF and GNU ld. When shared libraries
1847 are enabled, the new library `-ldl' is available for arbitrary run-time
1848 loading of shared objects; its interface is defined in <dlfcn.h>. The
1849 new header file <link.h> gives access to the internals of the run-time
1850 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1851 application of same name on other systems and it provides information
1852 about dynamically linked binaries.
1854 * The C library now provides the run-time support code for profiling
1855 executables compiled with `-pg'. Programs can control the profiling code
1856 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1857 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1858 the support for this file format was contributed by David Mosberger-Tang.
1860 * The math code has been replaced with a math library based on fdlibm from
1861 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1862 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1863 functions. The math functions now reside in a separate library, so
1864 programs using them will need to use `-lm' their linking commands.
1866 * John C. Bowman contributed optimized ix87 assembler inline functions.
1868 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1869 mechanism similar to that found in Solaris 2. This is now used for the
1870 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1871 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1872 file controls what services are used for each individual database. This
1873 works by loading shared libraries with names specified in `nsswitch.conf',
1874 so service modules can be changed or added at any time without even
1875 relinking any program. Currently there are the file, db, and NIS based
1876 NSS services available.
1878 * The new functions `strtoq' and `strtouq' parse integer values from
1879 strings, like `strtol' and `strtoul', but they return `long long int' and
1880 `unsigned long long int' values, respectively (64-bit quantities).
1882 * The new functions `strtof' and `strtold' parse floating-point values from
1883 strings, like `strtod', but they return `float' and `long double' values,
1884 respectively (on some machines `double' and `long double' are the same).
1886 * Ulrich Drepper has contributed new implementations of the floating-point
1887 printing and reading code used in the `printf' family of functions and
1888 `strtod', `strtof', and `strtold'. These new functions are perfectly
1889 accurate, and much faster than the old ones.
1891 * The implementation of the POSIX locale model was completely rewritten by
1892 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1893 to compile the POSIX locale definition.
1895 * The former dummy implementations of the strcoll and strxfrm function are
1896 now replaced by fully functional code contributed by Ulrich Drepper. The
1897 collation information comes from the POSIX locale definitions.
1899 * The new header <langinfo.h> defines an interface for accessing
1900 various locale-dependent data (using the locale chosen with `setlocale').
1902 * Ulrich Drepper has contributed a new suite of functions for operation on
1903 wide-character and multibyte-character strings, in <wchar.h>;
1904 and classification and case conversion of wide characters, in <wctype.h>.
1905 These new functions are conforming to the ISO C, Amendement 1 specification.
1907 * There is now a second implementation of the standard I/O library available.
1908 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1909 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1911 * You can now use positional parameter specifications in format strings
1912 for the `printf' and `scanf' families of functions. For example,
1913 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1914 ``Number 6, Mr Jones''. This is mainly useful when providing different
1915 format strings for different languages, whose grammars may dictate
1916 different orderings of the values being printed. To support this
1917 feature, the interface for `register_printf_handler' has changed; see
1918 the header file <printf.h> for details.
1920 * The `printf' and `scanf' families of functions now understand a new
1921 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1922 to group numbers as indicated by the locale; for `scanf' and friends, this
1923 says to accept as valid only a number with all the proper grouping
1924 separators in the right places. In the default "C" locale, numbers are
1925 not grouped; but locales for specific countries will define the usual
1926 conventions (i.e. separate thousands with `,' in the US locale).
1928 * The pgrp functions have been regularized, slightly incompatibly but much
1929 less confusingly. The core functions are now `getpgid' and `setpgid',
1930 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1931 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1932 provided for compatibility. There is no longer an incompatible `getpgrp'
1933 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1935 * The new header file <fts.h> and suite of functions simplify programs that
1936 operate on directory trees. This code comes from 4.4 BSD.
1938 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1939 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1940 NSS scheme used in glibc.
1942 * There is a new malloc debugging hook `__memalign_hook'.
1944 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1945 `unsigned int' in <sys/types.h>. These are for compatibility only and
1946 their use is discouraged.
1948 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1949 done differently, so that it works even without GNU ld.
1951 * New function `euidaccess' checks allowed access to a file like `access',
1952 but using the effective IDs instead of the real IDs.
1954 * The time zone data files have been updated for the latest and greatest
1955 local time conventions of the countries of the world.
1957 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1960 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1961 for formatting floating-point numbers. They are provided only for
1962 compatibility; new programs should use `sprintf' instead. There are
1963 also equivalent function for the `long double' floating-point type and
1964 all functions also exist in a reentrant form.
1966 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1967 functions for maintaining the login-record files (primarily of use to
1968 system programs such as `login'), and convenient functions for
1969 allocating and initializing a pseudo-terminal (pty) device.
1971 * Ulrich Drepper has contributed new support for System V style
1972 shared memory and IPC on systems that support it.
1974 * Ulrich Drepper has contributed several miscellaneous new functions found
1975 in System V: The `hsearch' family of functions provide an effective
1976 implementation of hash tables; `a64l' and `l64a' provide a very simple
1977 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1980 * Ulrich Drepper has contributed new reentrant counterparts for the
1981 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1983 * Ulrich Drepper has contributed new, highly-optimized versions of several
1984 string functions for the i486/Pentium family of processors.
1986 * Ulrich Drepper has updated the Linux-specific code, based largely
1987 on work done in Hongjiu Lu's version of GNU libc for Linux.
1988 The GNU library now supports Linux versions 2.0.10 and later,
1989 using the ELF object file format (i[3456]86-*-linux).
1991 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1993 * David Mosberger-Tang and Richard Henderson have ported the C library
1994 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1995 dynamic linking support for ELF/Alpha.
1997 * Richard Henderson contributed several Alpha optimized assembler function
1998 for arithmetic and string handling.
2000 * Ulrich Drepper has contributed a new set of message catalog functions to
2001 support multiple languages using the <libintl.h> interface, for use with
2002 his new package GNU gettext. Translation volunteers have contributed
2003 catalogs of the library's messages in Spanish, German, and Korean.
2005 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2006 program and the `catgets' function for reading the catalog files it
2007 creates. (The <libintl.h> interface is preferred; we include the
2008 <nl_types.h> interface using `catgets' only for source compatibility with
2009 programs already written to use it.)
2011 * New header file <values.h> gives SVID-compatible names for <limits.h>
2014 * Various new macros, declarations, and small header files for compatibility
2017 * New function `group_member' is a convenient way to check if a process has
2018 a given effective group ID.
2020 * When using GCC 2.7 and later, the socket functions are now declared in a
2021 special way so that passing an argument of type `struct sockaddr_in *',
2022 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2023 `struct sockaddr *' type, does not generate a type-clash warning.
2025 * New function `error' declared in header file <error.h> is a convenient
2026 function for printing error messages and optionally exiting; this is the
2027 canonical function used in GNU programs. The new functions `err', `warn',
2028 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2029 doing the same thing.
2031 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2032 POSIX.2 `glob' function to do ~ and {...} expansion.
2034 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2035 `clearenv' which is used in POSIX.9 is also available.
2037 * New function `getsid' returns session ID number on systems that support it.
2039 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2040 files <db.h> and <mpool.h> provide a rich set of functions for several
2041 types of simple databases stored in memory and in files, and <ndbm.h> is
2042 an old `ndbm'-compatible interface using the `db' functions. Link with
2043 `-ldb' to get these functions.
2045 * New macro `strdupa' copies a string like `strdup', but uses local stack
2046 space from `alloca' instead of dynamic heap space from `malloc'.
2048 * New function `strnlen' is like `strlen' but searches only a given maximum
2049 number of characters for the null terminator. `stpncpy', `strndup' and
2050 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2053 * New function `statfs' in header <sys/statfs.h>.
2055 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2056 provide convenient functions for operating on blocks of null-terminated
2059 * A new suite of functions in <utmp.h> handle all the details of reading
2060 and writing the utmp file.
2062 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2065 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2066 completely POSIX compliant and also implemented the extended functionality
2067 to handle alternate digit representation and alternate era date formats.
2069 * Ulrich Drepper provided an implementation of the `strptime' function
2070 defined in XPG4.2 which transforms a string into a `struct tm' value.
2072 * Paul Eggert provided the tzselect shell script as part of the timezone
2073 code. The shell script makes it easy to select the correct timezone
2076 * The implementation of the malloc family of functions is completely replaced
2077 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2078 The implementation uses the mmap function (if available) and it is
2079 optimized for the use in multi threaded programs.
2081 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2082 functions. This new functionality is usable by specifying a special
2083 salt string and it is compatible with implementation on *BSD systems.
2085 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2086 `getsubopt' to handle second level command line options, `bsd_signal'
2087 to access BSD style `signal' functionality, the obsolete `regexp' style
2090 * the `lchown' function is available on system which support this
2093 * The implementation of the shadow password handling function was contributed
2096 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2098 * POSIX.1g support was added. The <sys/select.h> header is available,
2099 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2100 implementation of `getaddrinfo'.
2104 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2106 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2107 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2109 * The new function `daemon' from 4.4 BSD is useful for server programs that
2110 want to put themselves in the background.
2112 * Joel Sherrill has contributed support for several standalone boards that
2113 run without an operating system.
2115 * `printf', `scanf' and friends now accept a `q' type modifier for long
2116 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2118 * All of the code taken from BSD (notably most of the math and networking
2119 routines) has been updated from the BSD 4.4-Lite release.
2121 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2123 * The new functions `getdomainname' and `setdomainname' fetch or change the
2124 YP/NIS domain name. These are system calls which exist on systems which
2127 * The time zone data files have been updated for the latest international
2130 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2131 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2135 * The C library now includes support for Sun RPC, from Sun's free
2136 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2137 are included. (There is still no support for YP.)
2139 * Tom Quinn has contributed a port of the C library to SGI machines running
2140 Irix 4 (mips-sgi-irix4).
2142 * The new `lockf' function is a simplified interface to the locking
2143 facilities of `fcntl', included for compatibility.
2145 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2147 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2149 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2152 * The error message printed by `assert' for a failed assertion now includes
2153 the name of the program (if using GNU ld) and the name of the calling
2154 function (with versions of GCC that support this).
2156 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2158 * The library now includes the <sys/mman.h> header file and memory
2159 management functions `mmap', `munmap', `mprotect', `msync', and
2160 `madvise', on systems that support those facilities.
2162 * The interface for `mcheck' has changed slightly: the function called to
2163 abort the program when an allocation inconsistency is detected now takes
2164 an argument that indicates the type of failure. The new function
2165 `mprobe' lets you request a consistency check for a particular block at
2166 any time (checks are normally done only when you call `free' or `realloc'
2169 * It is now possible to easily cross-compile the C library, building on one
2170 system a library to run on another machine and/or operating system. All
2171 you need to do is set the variable `HOST_CC' in `configparms' to the
2172 native compiler for programs to run on the machine you are building on (a
2173 few generator programs are used on Unix systems); set `CC' to the
2176 * The new function `fexecve' (only implemented on the GNU system) executes
2177 a program file given a file descriptor already open on the file.
2181 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2182 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2184 * You can set the variable `libprefix' in `configparms' to specify a prefix
2185 to be prepended to installed library files; this makes it easy to install
2186 the GNU C library to be linked as `-lgnuc' or whatever.
2188 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2189 copies a limited number of characters from a string, and returns the
2190 address of the last character written.
2192 * You no longer need to check for whether the installed `stddef.h' is
2193 compatible with the GNU C library. configure now checks for you.
2195 * You can now define a per-stream `fileno' function to convert the
2196 stream's cookie into an integral file descriptor.
2198 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2199 allocates zero bytes of storage, and returns a unique pointer which
2200 you can pass to `realloc' or `free'. The behavior is undefined if
2201 you dereference this pointer.
2203 * The C library now runs on Sony NEWS m68k machines running either
2204 NewsOS 3 or NewsOS 4.
2206 * The new `syscall' function is a system-dependent primitive function
2207 for invoking system calls. It has the canonical behavior on Unix
2208 systems, including unreliable return values for some calls (such as
2209 `pipe', `fork' and `getppid').
2211 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2212 to `EAGAIN', which is the preferred name. On systems whose kernels
2213 use two distinct codes, the C library now translates EWOULDBLOCK to
2214 EAGAIN in every system call function.
2218 * The GNU C Library Reference Manual is now distributed with the library.
2219 `make dvi' will produce a DVI file of the printed manual.
2220 `make info' will produce Info files that you can read on line using C-h i
2221 in Emacs or the `info' program.
2222 Please send comments on the manual to bug-glibc-manual@gnu.org.
2224 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2226 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2228 * Jason Merrill has contributed a port to the Sequent Symmetry running
2229 Dynix version 3 (i386-sequent-dynix).
2231 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2232 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2234 * New function `memory_warnings' lets you arrange to get warnings when
2235 malloc is running out of memory to allocate, like Emacs gives you.
2237 * The C library now contains the relocating allocator used in Emacs 19 for
2238 its editing buffers. This allocator (ralloc) minimizes allocation
2239 overhead and fragmentation by moving allocated regions around whenever it
2240 needs to. You always refer to a ralloc'd region with a "handle" (a
2241 pointer to a pointer--an object of type `void **').
2243 * There is a new `printf' format: `%m' gives you the string corresponding
2244 to the error code in `errno'.
2246 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2247 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2248 pass, the `a' modifier says to fill in a `char **' you pass with a
2251 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2252 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2253 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2255 * `mkstemp' is a traditional Unix function to atomically create and open a
2256 uniquely-named temporary file.
2260 * The standard location for the file that says what the local timezone is
2261 has changed again. It is now `/usr/local/etc/localtime' (or more
2262 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2264 * The distribution no longer contains any files with names longer than 14
2267 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2268 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2270 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2274 * The configuration process has changed quite a bit. The `configure'
2275 script is now used just like the configuration scripts for other GNU
2276 packages. The `sysdeps' directory hierarchy is much rearranged.
2277 The file `INSTALL' explains the new scheme in detail.
2279 * The header files no longer need to be processed into ANSI C and
2280 traditional C versions. There is just one set of files to install, and
2281 it will work with ANSI or old C compilers (including `gcc -traditional').
2283 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2284 MIPS DECStation running Ultrix 4.
2286 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2287 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2288 made itself into a shared library.
2290 * Yet further improved support for the i386, running 4.3 BSD-like systems
2291 (such as Mach 3 with the Unix single-server), or System V.
2293 * New function `strncasecmp' to do case-insensitive string comparison
2294 with limited length.
2296 * New function `strsep' is a reentrant alternative to `strtok'.
2298 * New functions `scandir' and `alphasort' for searching directories.
2300 * New function `setenv' is a better interface to `putenv'.
2302 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2303 function for traversing a directory tree.
2305 * The GNU obstack package is now also part of the C library.
2306 The new function `open_obstack_stream' creates a stdio stream that
2307 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2308 formatted output directly to an obstack.
2310 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2311 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2313 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2315 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2316 things to your strings.
2318 * There are some new test programs: test-fseek, testmb, and testrand.
2320 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2321 These ports are not finished, but are a good starting place for really
2322 supporting those systems.
2324 * `/etc/localtime' is now the standard location for the file that says what
2325 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2326 This follows the general principle that `/etc' is the place for all local
2327 configuration files.
2329 * The C library header files now use `extern "C"' when used by the C++
2330 compiler, so the C library should now work with C++ code.
2332 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2333 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2336 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2337 function which uses the `merge sort' algorithm, and is said to be
2338 significantly faster than the old GNU `qsort' function. Merge sort is
2339 now the standard `qsort' function. The new algorithm can require a lot
2340 of temporary storage; so, the old sorting function is called when the
2341 required storage is not available.
2343 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2344 provides the Unix `crypt' function, plus some other entry points.
2346 * The code and header files taken from 4.4 BSD have been updated with the
2347 latest files released from Berkeley.
2349 ----------------------------------------------------------------------
2350 Copyright information:
2352 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2354 Permission is granted to anyone to make or distribute verbatim copies
2355 of this document as received, in any medium, provided that the
2356 copyright notice and this permission notice are preserved,
2357 thus giving the recipient permission to redistribute in turn.
2359 Permission is granted to distribute modified versions
2360 of this document, or of portions of it,
2361 under the above conditions, provided also that they
2362 carry prominent notices stating who last changed them.
2365 version-control: never