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 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
13 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
14 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
15 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
16 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
17 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
18 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
19 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
20 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
21 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
22 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
23 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
24 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
27 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
28 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
29 Distributions can re-enable building and using pt_chown via the new configure
30 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
31 considerable security risks and should only be used if the distribution
32 understands and accepts the risks.
34 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
37 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
38 fixed (Bugzilla #15330).
40 * Add support for calling C++11 thread_local object destructors on thread
41 and program exit. This needs compiler support for offloading C++11
42 destructor calls to glibc.
44 * Improved worst case performance of libm functions with double inputs and
47 * Support for priority inherited mutexes in pthread condition variables on
48 non-x86 architectures.
50 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
52 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
54 * Optimized string functions for ARM. Implemented by Will Newton and
57 * Optimized libm functions for SPARC. Implemented by David S. Miller.
59 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
62 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
63 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
65 * Added a benchmark framework to track performance of functions in glibc.
67 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
68 It is based on draft TS 18661 and currently enabled as a GNU extension.
70 * On Linux, the clock function now uses the clock_gettime system call
71 for improved precision, rather than old times system call.
73 * Added new API functions pthread_getattr_default_np and
74 pthread_setattr_default_np to get and set the default pthread
75 attributes of a process.
77 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
78 This may improve lock scaling of existing programs on TSX capable systems.
79 When the --enable-lock-elision=yes parameter is specified at configure
80 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
83 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
84 availability). Implemented by Ryan S. Arnold.
86 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
90 * The following bugs are resolved with this release:
92 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
93 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
94 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
95 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
96 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
97 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
98 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
99 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
100 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
101 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
102 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
103 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
104 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
105 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
106 14879, 14889, 14893, 14898, 14914.
108 * Optimization of memcpy for MIPS.
110 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
111 EMFILE has been fixed (Bugzilla #14889).
113 * The add-on ports collection is now distributed in the "ports" subdirectory
114 of the main GNU C Library distribution, rather than separately.
116 * Port to ARM AArch64 contributed by Linaro.
118 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
119 Optimized versions of memcpy, memset, and memcmp added for System z10 and
121 Implemented by Andreas Krebbel.
123 * The new function secure_getenv allows secure access to the environment,
124 returning NULL if running in a SUID/SGID process. This function replaces
125 the internal function __secure_getenv.
127 * SystemTap static probes have been added into the dynamic linker.
128 Implemented by Gary Benson.
130 * Optimizations of string functions strstr, strcasestr and memmem.
131 Implemented by Maxim Kuvyrkov.
133 * The minimum Linux kernel version that this version of the GNU C Library
134 can be used with is 2.6.16.
136 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
137 powerpc POWER7. Implemented by Will Schmidt.
139 * New configure option --disable-nscd builds the C library such that it
140 never attempts to contact the Name Service Caching Daemon (nscd).
141 New configure option --disable-build-nscd avoids building nscd itself;
142 this is the default if --disable-nscd is used.
144 * Improved support for cross-compilation, including cross-testing and
145 bootstrap builds without a previously built glibc.
147 * Several testsuite tests are now able to test multiple IFUNC variants of an
148 interface, rather than just testing the one that would be chooen by
151 * New configure options --with-bugurl and --with-pkgversion, for
152 distributors to use to embed their bug-reporting and package version
153 information in --help and --version output.
155 * The ttyname and ttyname_r functions on Linux now fall back to searching for
156 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
157 allows creation of chroots without the procfs mounted on /proc.
159 * The `crypt' function now fails if passed salt bytes that violate the
160 specification for those values. On Linux, the `crypt' function will
161 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
162 enabled, and fail on encrypted strings using the MD5 or DES algorithm
163 when the mode is enabled.
165 * The `clock_*' suite of functions (declared in <time.h>) is now available
166 directly in the main C library. Previously it was necessary to link with
167 -lrt to use these functions. This change has the effect that a
168 single-threaded program that uses a function such as `clock_gettime' (and
169 is not linked with -lrt) will no longer implicitly load the pthreads
170 library at runtime and so will not suffer the overheads associated with
171 multi-thread support in other code such as the C++ runtime library.
173 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
178 * The following bugs are resolved with this release:
180 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
181 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
182 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
183 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
184 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
185 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
186 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
187 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
188 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
189 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
190 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
191 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
192 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
193 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
194 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
195 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
196 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
197 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
198 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
199 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
200 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
201 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
204 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
205 configuring glibc with:
206 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
207 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
208 Implemented by H.J. Lu.
212 + define static_assert
214 + do not declare gets
216 + declare at_quick_exit and quick_exit also for ISO C11
218 + aligned_alloc. NB: The code is deliberately allows the size parameter
219 to not be a multiple of the alignment. This is a moronic requirement
220 in the standard but it is only a requirement on the caller, not the
225 + uchar.h support added
227 + CMPLX, CMPLXF, CMPLXL added
229 Implemented by Ulrich Drepper.
231 * Support for the IA-64 has been moved to ports.
233 * Remove support for anything but ELF binary format
235 * Checking versions of poll, ppoll added.
236 Implemented by Ulrich Drepper.
238 * More generic and 64-bit performance optimizations to math functions.
239 Implemented by Ulrich Drepper.
241 * New configure option --enable-obsolete-rpc makes the deprecated RPC
242 headers and functions available at compile time as they were before
243 version 2.14. This option will be removed at some time in the future
244 after the TI-RPC library becomes fully sufficient for the needs of
245 existing applications.
247 * Compatibility code for Linux kernel versions before 2.4 has been removed.
248 Note that glibc is not expected to work with any Linux kernel version
251 * New header <sys/auxv.h> and function getauxval allowing easy access to
252 the AT_* key-value pairs passed from the Linux kernel. The header also
253 defines the HWCAP_* bits associated with the AT_HWCAP key.
255 * New locales: mag_IN
257 * New configure option --enable-systemtap builds SystemTap static probes
258 into libc for setjmp and longjmp and into libpthread for various operations.
259 So far the setjmp/longjmp probes and some of the libpthread probes are
260 provided only for i*86 and x86_64.
261 Implemented by Roland McGrath and Rayson Ho.
263 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
265 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
268 * More optimized functions for SPARC. Implemented by David S. Miller.
270 * Improved support for cross-compilation, especially bootstrap builds
271 without a previously built glibc.
273 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
274 Chris Metcalf from Tilera.
276 * Support for the old ARM ABI has been removed from ports. Only the EABI is
277 now supported for ARM processors.
279 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
280 as the name of the dynamic linker, to distinguish it from the
281 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
283 * Support for CRIS has been removed from ports.
285 * A new class of installed header has been documented for low-level
286 platform-specific functionality. PowerPC added the first instance with a
287 function to provide time base register access. Contributed by Tulio
288 Magno Quites Machado Filho.
290 * ix86 configurations now install header files that are consistent with
291 what x86-64 configurations install. These same header files can be used
292 for -m32, -m64, or -mx32 builds.
293 Contributed by H.J. Lu.
295 * Math library bug fixes. A thorough audit of all open math library bugs was
296 conducted by Joseph Myers. Significant progress was made on many math
297 library bugs resulting in more accurate exceptions and function results.
298 Many thanks to all those that contributed including Andreas Jaeger for his
299 patch review and work on the x87 trigonometric instruction issues.
301 * Timezone data is no longer installed. Timezone-related binaries and scripts
302 will continue to be installed. Users should obtain their timezone data from
303 their distribution provider or from the tzdata package at
304 <ftp://munnari.oz.au/pub/>.
308 * The following bugs are resolved with this release:
310 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
311 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
312 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
313 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
314 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
315 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
316 13484, 13506, 13515, 13523, 13524, 13538, 13540
318 * New program pldd to list loaded object of a process
319 Implemented by Ulrich Drepper.
321 * Add nss_db support back to glibc. No more dependency on Berkeley db
322 and support for initgroups lookups.
323 Implemented by Ulrich Drepper.
325 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
326 Contributed by HJ Lu.
328 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
329 Contributed by HJ Lu.
331 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
332 on x86-32 and x86-64.
333 Contributed by Liubov Dmitrieva.
335 * Optimized strchr and strrchr for SSE on x86-32.
336 Contributed by Liubov Dmitrieva.
338 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
339 for x86-64 and x86-32.
340 Contributed by Liubov Dmitrieva.
342 * New interfaces: scandirat, scandirat64
343 Implemented by Ulrich Drepper.
345 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
346 Implemented by Ulrich Drepper.
348 * nscd now also caches the netgroup database.
349 Implemented by Ulrich Drepper.
351 * Integrate libm with gcc's -ffinite-math-only option.
352 Implemented by Ulrich Drepper.
354 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
355 to math functions. Implemented by Ulrich Drepper.
357 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
358 Implemented by Ulrich Drepper.
360 * New Linux interfaces: process_vm_readv, process_vm_writev
362 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
363 Implemented by Ulrich Drepper.
365 * Optimized nearbyint and strcasecmp for PPC.
366 Implemented by Adhemerval Zanella.
368 * New locales: bho_IN, unm_US, es_CU, ta_LK
372 * The following bugs are resolved with this release:
374 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
375 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
376 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
377 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
378 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
379 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
380 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
381 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
382 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
383 12795, 12811, 12813, 12814, 12841
385 * The RPC implementation in libc is obsoleted. Old programs keep working
386 but new programs cannot be linked with the routines in libc anymore.
387 Programs in need of RPC functionality must be linked against TI-RPC.
388 The TI-RPC implementation is IPv6 enabled and there are other benefits.
390 Visible changes of this change include (obviously) the inability to link
391 programs using RPC functions without referencing the TI-RPC library and the
392 removal of the RPC headers from the glibc headers.
393 Implemented by Ulrich Drepper.
395 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
396 syncfs, setns, sendmmsg
398 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
399 yue_HK, lij_IT, mhr_RU
401 * New encodings: CP770, CP771, CP772, CP773, CP774
403 * New program sotruss to trace calls through PLTs
404 Implemented by Ulrich Drepper.
406 * The malloc hook implementation is marked deprecated and will be removed
407 from the default implementation in the next version. The design never
408 worked ever since the introduction of threads. Even programs which do
409 not create threads themselves can use multiple threads created internally.
413 * The following bugs are resolved with this release:
415 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
416 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
417 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
418 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
421 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
423 * POWER7 optimizations: memset, memcmp, strncmp
425 * New optimized string functions for x86-64: strnlen (SSE2),
426 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
427 Implemented by Ulrich Drepper.
431 * The following bugs are resolved with this release:
433 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
434 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
435 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
436 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
437 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
438 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
439 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
440 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
442 * New interfaces: pthread_getname_np, pthread_setname_np
444 * New Linux interface: recvmmsg
446 * STT_GNU_IFUNC implemented for Sparc by David Miller.
448 * The dynamic linker now recognizes supported ABI versions from the
449 EI_ABIVERSION field in the ELF header.
450 Implemented by Ulrich Drepper.
452 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
453 will not be used to fill in password fields in the passwd.byname replies.
454 Instead it is used to synthesize the shadow.byname table, should it be
455 missing. This is a useful mode in some installations involving Solaris.
456 Implemented by Ulrich Drepper.
458 * New locales: kok_IN, sq_MK, cv_RU
462 * The following bugs are resolved with this release:
464 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
465 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
466 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
467 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
468 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
469 10789, 10817, 10823, 10840, 10847
471 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
473 Implemented by Ulrich Drepper.
475 * Checking version of longjmp added that fails if an uninitialized stack
476 frame would be created. Implemented by Ulrich Drepper.
478 * STT_GNU_IFUNC is now supported in static executables.
479 Implemented by H.J. Lu.
481 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
483 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
484 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
485 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
486 Contributed by H.J. Lu.
488 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
489 Implemented by Ulrich Drepper.
491 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
493 Contributed by H.J. Lu.
495 * Support for fma instruction in AVX on x86-64.
496 Implemented by H.J. Lu and Ulrich Drepper.
498 * AVX support in x86-64 auditing support in ld.so.
499 Implemented by H.J. Lu.
501 * STB_GNU_UNIQUE support added.
502 Implemented by Ulrich Drepper.
504 * Implement second fallback mode for optimized DNS lookup for even more
505 broken environments. If two requests from the same port are not
506 handled correctly close the socket and open a new one before sending
507 the second request. The 'single-request-reopen' option in /etc/resolv.conf
508 can be used to select this mode right away, instead of rediscovering the
509 necessity is every process again.
510 Implemented by Ulrich Drepper.
512 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
513 Implemented by Adam Tkac.
515 * Optimized iconv conversions for S390x.
516 Implemented by Andreas Krebbel.
518 * Using condvars with PI mutexes is now more efficient due to kernel
519 support for requeueing to PI futexes. NPTL support added for x86-64.
520 Implemented by Ulrich Drepper.
522 * New locales: ps_AF, my_MM
526 * The following bugs are resolved with this release:
528 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
529 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
530 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
531 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
532 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
534 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
535 Implemented by Ulrich Drepper.
537 * New Linux interfaces: accept4, fallocate, fallocate64.
538 Implemented by Ulrich Drepper.
540 * Correct declarations of string function when used in C++ code. This
541 could lead to compile errors for invalid C++ code.
543 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
546 * New POSIX 2008 interface: psiginfo
547 Implemented by Ulrich Drepper.
549 * New ISO C++1x interfaces: quick_exit, at_quick_exit
550 Implemented by Ulrich Drepper.
552 * Support for selecting between multiple function definitions at runtime
553 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
555 * The libcrypt library can now use the hash function implementations in
556 NSS. Implemented by Ulrich Drepper.
558 * The malloc implementation can be compiled to be less memory efficient
559 but higher performing in multi-threaded programs.
560 Implemented by Ulrich Drepper.
562 * New locales: nan_TW@latin, ks_IN
564 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
565 Implemented by Ulrich Drepper.
567 * Extended printf hook support. It is possible to use user-defined types
568 and extend existing format specifiers.
569 Implemented by Ulrich Drepper.
571 * Handling for group shadow files has been added.
572 Implemented by Ulrich Drepper.
574 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
575 servers (the case, e.g., for some people using the built-in DNS
576 server in ADSL modems/routers). There is a once-per-process timeout
577 in case of a broken server. To avoid it, users can run nscd or put
578 'options single-request' in /etc/resolv.conf.
579 Implemented by Ulrich Drepper.
583 * The following bugs are resolved with this release:
585 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
586 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
587 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
588 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
589 6968, 6974, 6980, 6995, 7008, 7009, 7029
591 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
592 up at the same time. Implemented by Ulrich Drepper.
594 * TLS descriptors for LD and GD on x86 and x86-64.
595 Implemented by Alexandre Oliva.
597 * getaddrinfo now handles DCCP and UDPlite.
598 Implemented by Ulrich Drepper.
600 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
601 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
602 Implemented by Ulrich Drepper.
604 * New implementation of memmem, strstr, and strcasestr which is O(n).
605 Implemented by Eric Blake.
607 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
609 * Implement "e" option for popen to open file descriptor with the
610 close-on-exec flag set. Implemented by Ulrich Drepper.
612 * Implement "b" mode for fmemopen. In this mode writes writes don't
613 implicitly add a NUL byte and seeks from the end of the buffer really
614 use the buffer end, not the string length as the basis.
615 Implemented by Ulrich Drepper.
617 * Many functions, exported and internal, now atomically set the close-on-exec
618 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
620 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
622 Implemented by Pravin Satpute.
624 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
628 * The following bugs are resolved with this release:
630 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
631 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
632 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
633 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
634 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
635 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
636 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
638 * New locales: bo_CN, bo_IN, shs_CA.
640 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
642 * Sorting rules for some Indian languages (Devanagari and Gujarati).
643 Implemented by Pravin Satpute.
645 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
647 * nscd caches now all timeouts for DNS entries
648 Implemented by Ulrich Drepper.
650 * nscd is more efficient and wakes up less often.
651 Implemented by Ulrich Drepper.
653 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
654 vdprintf, and obstack_vprintf.
655 Implemented by Jakub Jelinek.
657 * Faster memset for x86-64.
658 Implemented by Harsha Jagasia and H.J. Lu.
660 * Faster memcpy on x86.
661 Implemented by Ulrich Drepper.
663 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
664 Implemented by Ulrich Drepper.
666 * Faster sqrt and sqrtf implemention for some PPC variants.
667 Implemented by Steven Munroe.
671 * The following bugs are resolved with this release:
673 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
674 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
675 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
676 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
677 5071, 5103, 5104, 5112, 5113, 5184, 5186
679 * More checking functions: fread, fread_unlocked, open*, mq_open.
680 Implemented by Jakub Jelinek and Ulrich Drepper.
682 * Extend fortification to C++. Implemented by Jakub Jelinek.
684 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
685 by not recognizing 'a' as a modifier when those specs are requested.
686 Implemented by Jakub Jelinek.
688 * PPC optimizations to math and string functions.
689 Implemented by Steven Munroe.
691 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
692 options to be passed. Implemented by Ulrich Drepper.
694 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
696 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
697 Implemented by Ulrich Drepper.
699 * Handle private futexes in the NPTL implementation.
700 Implemented by Jakub Jelinek and Ulrich Drepper.
702 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
703 Implemented by Roland McGrath and Ulrich Drepper.
705 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
707 * SHA-256 and SHA-512 based password encryption.
708 Implemented by Ulrich Drepper.
710 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
711 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
714 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
715 Implemented by Ulrich Drepper.
719 * The following bugs are resolved with this release:
721 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
722 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
723 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
724 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
725 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
726 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
727 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
730 * New Linux interfaces: epoll_pwait, sched_getcpu.
732 * New generic interfaces: strerror_l.
734 * nscd can now cache the services database. Implemented by Ulrich Drepper.
738 * The following bugs are resolved with this release:
740 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
741 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
742 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
743 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
744 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
745 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
746 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
747 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
748 3225, 3251, 3252, 3253, 3273
750 * For Linux, the sorting of addresses returned by getaddrinfo now also
751 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
752 Implemented by Ulrich Drepper.
754 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
755 Implemented by Ulrich Drepper.
757 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
759 * New iconv module for MIK. Contributed by Alexander Shopov.
761 * For sites with broken group and/or passwd database, the auto-propagate
762 option of nscd can prevent creating ID lookup entries from the results
763 of a name lookup and vice versa. This usually is no problem but some
764 site might have problems with the default behavior.
765 Implemented by Ulrich Drepper.
767 * Iterating over entire database in NIS can be slow. With the
768 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
769 to trade time for memory. The entire database will be read at once.
770 Implemented by Ulrich Drepper.
772 * The interfaces introduced in RFC 3542 have been implemented by
775 * Support for the new ELF hash table format was added by Ulrich Drepper.
777 * Support for priority inheritance mutexes added by Jakub Jelinek and
780 * Support for priority protected mutexes added by Jakub Jelinek.
782 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
783 or_IN, csb_PL, fy_NL, sr_ME.
787 * More overflow detection functions.
789 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
790 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
792 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
793 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
794 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
795 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
796 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
797 by Masahide Washizawa.
799 * It is now possible to install audit libraries for the dynamic linker using
800 LD_AUDIT. Implemented by Ulrich Drepper.
802 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
803 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
804 For a libc and libpthread that works well on Linux 2.4 kernels, we
805 recommend using the stable 2.3 branch.
807 * The new function open_wmemstream acts like open_memstream,
808 but uses a wchar_t wide character buffer.
810 * The new function ppoll is an improved version of poll, similar to pselect.
812 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
813 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
814 renameat, unlinkat, linkat, symlinkat, readlinkat.
816 * New Linux kernel system calls: unshare,
817 inotify_init, inotify_add_watch, inotify_rm_watch.
819 * The euidaccess function is now also known by the alias eaccess,
820 for compatibility with some other systems.
822 * Timezone data updated to 2006b version.
826 * The following bugs are resolved with this release:
828 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
829 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
830 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
831 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
832 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
833 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
835 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
837 * As of this release, GCC 4 can be used to compile the C Library.
839 * Timezone data updated to 2005m version.
843 * The following bugs are resolved with this release:
845 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
846 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
847 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
848 777, 787, 821, 822, 823, 825
850 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
854 * Support for RFC 3678. Real implementations exist only for Linux so far.
855 Implemented by Ulrich Drepper.
857 * nscd can now cache entries persistently. Expiring entries are reloaded.
858 For speedups the cache can be shared in memory with client processes.
859 Implemented by Ulrich Drepper.
861 * nscd can now perform SELinux checks.
862 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
864 * getaddrinfo queries are now cached. Canonical name lookup is performed
866 Implemented by Ulrich Drepper.
868 * The nothrow function attribute is used when headers are used by gcc when
869 compiling C code. This can avoid significant amounts of exception
872 * The malloc functions perform more error checking and are stricter when
873 it comes to reacting on errors. The default action is to terminate
874 the process after showing an error message. Implemented by Ulrich Drepper.
876 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
877 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
879 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
880 namespaces using the new function dlmopen(). This feature is of course,
881 like most other dynamic loading functionality, not available in statically
882 linked applications. Implemented by Ulrich Drepper.
884 * Low-overhead boundary checking variants of string and some stdio functions
885 were added. These are to be used in conjunction with a gcc patch by
886 Jakub Jelinek which adds calls to these functions if possible.
887 Implemented by Jakub Jelinek and Ulrich Drepper.
889 * Old code for several operating systems and machine architectures that
890 have not been in working condition in a long time have been removed from
891 the main source tree maintained by the GNU C Library's maintainers.
892 These files are now reside in the separate `ports' source module
893 that is usable as an add-on when building the library.
897 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
898 interrogate the dynamic linker, compatible with the Solaris interface.
900 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
901 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
903 * getifaddrs now uses the netlink interface on Linux to get its information.
904 Implemented by Thorsten Kukuk.
906 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
907 Implemented by Ulrich Drepper.
909 * support for non-executable stacks on x86 has been added. Changes mostly
912 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
915 * getaddrinfo now performs destination address selection according to
920 * Thread-safe interfaces for many functions that access locale data
921 were added in version 2.3, but these features were omitted from NEWS.
922 Many functions have variants with an `_l' suffix that take a `locale_t'
923 object as a parameter rather than consulting the current locale.
924 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
925 create and maintain `locale_t' objects. Additionally, the new function
926 `uselocale' sets "the current locale" (as used by functions not so
927 parameterized) set for an individual thread. These features were added
928 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
930 * The functions getresuid, getresgid, setresuid, and setresgid, which
931 have long been available on Linux, are now declared in <unistd.h>
932 and are now also available on the Hurd.
934 * ELF thread-local storage support (TLS) now works on x86-64.
936 * The new dynamic string token $LIB is expanded in shared library names.
937 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
939 * Aldy Hernandez contributed complete software floating point support for
940 PowerPC machines with no FPU.
942 * fexecve is implemented on Linux.
944 * The `btowc' function should work at least twice as fast due to
945 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
947 * With approriate thread add-ons cancelable functions are now implemented
948 in libc.so as well. No need to call the function in libpthread. This
949 change allowed to finally disable the incorrect and expensive handling
950 of weak definition in ld.so.
952 * Yet more PLT entries in libc.so have been removed. We finally arrived
953 at the bare minimum. Startup times improved appropriately.
955 * Support for the new Linux/x86 system call interface was added. The
956 AT_SYSINFO auxiliary vector entry is recognized and handled.
960 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
963 * iconv (the program and the interface) now accepts empty names (excluding
964 options like //TRANSLIT) to mean "use charset of current locale".
966 * localedef can now transliterate characters in strings which are not in
967 the provided charmap. The information from the input locale is used.
969 * Prelinking support was added for ELF targets. This requires additional
970 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
972 * Read-only stdio streams now use mmap to speed up operation by eliminating
973 copying and buffer underflows. To use add 'm' to the mode string of
974 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
976 * The malloc functions were completely rewritten by Wolfram Gloger based
977 on Doug Lea's malloc-2.7.0.c.
979 * Isamu Hasegawa contributed a completely new and POSIX-conformant
980 implementation of regex.
982 * Bruno Haible upgraded the iconv and locale implementation to support
985 * Contents of the LC_* and LANG environment variables in the CEN style are
986 not recognized anymore. It never was used. Change by Ulrich Drepper.
988 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
989 thread-local storage (TLS) ABI on some platforms.
990 Changes by Ulrich Drepper. SH support by Kaz Kojima.
992 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
993 EUC-JISX0213, and TSCII.
995 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
996 BSD-compatible interface for getting all network interface addresses.
997 Implementation for IPv4 by Roland McGrath.
999 * Loading of locale data is faster due to the introduction of a locale
1000 archive. Implemented by Roland McGrath and Ulrich Drepper.
1002 * Startup times are significantly reduced by not using exported functions
1003 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1006 * Steven Munroe contributed a port to PowerPC64/Linux.
1010 * The Hurd now uses the GNU libio implementation of stdio rather than the
1011 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1013 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1014 with the same behavior as the Linux system call of the same name.
1018 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1019 128-bit long double format.
1021 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1022 IBM1161, and IBM1162 charsets.
1024 * Andreas Jaeger contributed a port to x86-64/Linux.
1026 * Peter Bruin contributed a port to PowerPC/Hurd.
1028 * libc functions using I/O streams now can handle wide-oriented streams
1031 * optimizations in the dynamic linker. Binaries created by recent binutils
1032 versions start up quicker due to reduced time spent on relocations.
1034 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1038 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1039 asinh, atanh, j0 for the 128-bit long double format.
1041 * Bruno Haible updated all the code handling Unicode in some form to
1042 support Unicode 3.1.
1044 * Speed of regex for single-byte locales is back to previous levels.
1045 Patch by Isamu Hasegawa.
1047 * Alpha, SPARC, and IA-64 now also using floating stacks.
1049 * Startup time of internationalized applications greatly improved through
1050 iconv cache. Use iconvconfig to generate the cache file.
1051 Contributed by Ulrich Drepper.
1053 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1054 severe performance problems. Patch by David Mosberger.
1056 * The Hurd port got a lot more functionality like AIO, various stdio
1057 extensions, etc. Mainly done by Roland McGrath.
1059 * mtrace can now lookup symbols in shared libraries.
1063 * Intel's IA-64 math library is largely integrated. It provides fast and
1064 accurate implementatations for most basic and standard math functions
1065 in float, double, and long double format.
1067 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1068 and asin for the 96-bit long double format and asin, log, tan for the
1069 128-bit long double format.
1071 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1072 The basic double functions exist today. Contributed by Abraham Ziv
1073 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1074 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1076 * An asynchronous name lookup library was added. The interface is designed
1077 after POSIX AIO. The proposal was circulated beforehand to get comments.
1078 No negative ones came in. Implemented by Ulrich Drepper.
1080 * Port to S390/64bit contributed by Martin Schwidefsky
1081 <schwidefsky@de.ibm.com>.
1083 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1084 of functions for Linux/IA-64.
1086 * The RPC code is now thread safe. Threads can now use the same service
1087 of different services at the same time. Patch by Eric Norum
1088 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1090 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1091 family of functions for Linux/S390.
1093 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1094 of functions for Linux/x86.
1096 * Port to Linux/CRIS contributed by Axis Communications.
1100 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1101 we can now check for namespace violations and missing declarations. The
1102 result is that almost all headers are now Unix-compliant (as defined in
1103 the upcoming XPG6). The negative side is that some programs might need
1104 corrections, too, if they depend on the incorrect form of the headers in
1105 previous versions which defined too many symbols and included too many
1108 * regex now handles multibyte character sets correctly.
1109 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1111 * iconv (the program) does now conform to the upcoming XPG6 and handles
1112 charmaps. Instead of the charset names the path of charmaps can be
1113 provided and the conversion happens based on this data.
1114 Contributed by Ulrich Drepper.
1116 * The locale program now provides detailed information about the installed
1121 only lists the names of the supported locales
1125 provides details such as country, language, and codeset name.
1126 Contributed by Ulrich Drepper.
1130 * The gencat program now parses the input file according to the charset
1131 selected by the LC_CTYPE category. This is important for stateful
1132 character sets. To make generating catalogs easier there is a way
1133 to overwrite the charset selected by the locale: before the first
1134 message or $ quote line the catalog can contain a line like
1136 $ codeset=ISO-8859-2
1138 to select the charset (ISO-8859-2 in this case).
1140 Implemented by Shinya Hanataka and Ulrich Drepper.
1142 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1143 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1144 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1146 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1147 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1149 * The LANGUAGE environment variable is now ignored unless the locale is
1150 changed from the default "C" locale.
1152 * The usual bug fixes.
1156 * Greg McGary added runtime support for bounds checking using gcc's
1157 new -fbounded-pointers option. ix86 target is complete. PowerPC
1160 * Thorsten Kukuk added secure mode support to nscd.
1162 * The Berkeley db libraries have been removed.
1164 Related, the nss_db module is now in a separate package since it
1165 obviously requires a database library being available.
1167 * Wide character I/O streams implemented by Ulrich Drepper.
1169 * Functions from the extended socket API added by Ulrich Drepper.
1171 * Functions feenableexcept and fedisableexcept to control the
1172 behaviour of individual exceptions have been added by Andreas Jaeger.
1174 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1176 * The resolver code has been updated from bind 8.2.3-T5B which supports
1177 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1180 This change could in some situations effect backward compatibility. Since
1181 now `_res' is a thread-local instead of a global variable, modifying it
1182 in one thread does not have any effect in other threads.
1184 The resolver library was also extended to allow IPv6 as the transport
1185 protocol for the requests. This work was done by Stig Venaas.
1187 * Compatibility code for K&R C compilers has been removed from the
1188 header files. A ISO C compiler is needed to use the library
1189 (conforming to either C89 or C99 standard).
1191 * Complete rewrite of the localedef program to support multibyte character
1192 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1193 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1194 Implemented by Ulrich Drepper.
1196 Bruno Haible significantly improved the generation and use of the data
1197 structures for the wide character tables.
1199 * Plural handling in gettext implemented by Ulrich Drepper.
1201 * The utmp daemon has been removed.
1203 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1205 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1208 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1210 * POSIX barriers implemented by Kaz Kylheku.
1212 * POSIX spawn function family implemented by Ulrich Drepper.
1214 * POSIX spinlocks are now available.
1216 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1218 * the configure option --enable-kernel=X.Y.Z allows to strip out
1219 compatibility for kernel versions before X.Y.Z. This is currently only
1220 implemented for Linux.
1222 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1223 field sin6_scope_id. This means that all programs using IPv6 should be
1224 recompiled. Don't expect binary compatibility with previous glibc
1227 * various conversion modules for IBM character sets contributed by
1230 * IA-64 port by Jes Sorensen and HJ Lu.
1244 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1246 * New xdr functions are added; some rpc functions are now 64bit clean.
1248 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1250 * Fixed known incompatibilities with glibc 2.0.
1252 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1254 * Optimized a number of functions (especially the ELF dynamic loader).
1256 * Update timezone data files.
1258 * lots of charmaps corrections
1260 * some new locale definitions and charmaps
1265 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1266 conform to POSIX member type requirements. Symbol versions have been
1267 adjusted as needed within the library, and for direct use by applications,
1268 but there is potential for problems if third-party libraries use
1269 struct timeval as part of their interface. This does not present
1270 a problem for X and other "essential" system libraries.
1272 * An additional locale model to support C++ Standard Library locale
1273 model and probably more was implemented by Ulrich Drepper.
1275 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1278 * Miles Bader provided the `argp' function family to support hierachical
1279 command line argument parsing, layered on top of getopt.
1281 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1283 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1286 * scanf recognizes the %a and %A format for scanning floating point numbers.
1288 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1289 information and interfaces for the available integer types.
1291 * about 130 new math functions were added to implement the ISO C9x math
1294 * the new header <complex.h> contains definitions of the complex math
1295 functions from ISO C 9X.
1297 * the new header <tgmath.h> defines generic macros to use complex or
1298 real valued functions.
1300 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1302 * Andreas Jaeger provided a test suite for the math library.
1304 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1306 * Ulrich Drepper added character set conversion functions (iconv).
1308 * Optimized string functions have been added.
1310 * The localedata addon is now part of glibc.
1312 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1314 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1315 daemon for NSS (nscd).
1317 Missing a better place here are some numbers on improvements. Under
1318 Linux 2.1.125 un-tar-ing the kernel sources takes
1322 using local files 12.19s 6.88s 22.91s
1324 using NIS 13.92s 8.91s 26.34s
1326 using NIS & nscd 10.37s 7.34s 25.30s
1328 using NIS+ 27.57s 30.37s 640.46s
1330 using NIS+ & nscd 10.25s 7.83s 26.51s
1332 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1334 Keep in mind that non-namelookup related operations dominate above times.
1335 It was just a common complain that using NIS+ unpacking the kernel is
1338 [1] The old nscd implementation is not available anymore since it was
1339 distributed with glibc up to version 2.0.98 and thus is now replaced.
1341 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1343 * Mark Kettenis provided a Hesiod NSS module.
1345 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1346 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1348 * rcmd can now handle netgroups (Dick Streefland).
1350 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1353 * Support for the IPv6 protocol has been added to the socket API, as per the
1354 latest draft standards.
1356 * Support for Linux 2.2 has been added.
1358 * Interface changes relative to the latest 2.0.x release:
1359 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1360 addseverity NEW: Unix98
1361 alphasort64 NEW: LFS
1362 argp_err_exit_status NEW: argp, GNU ext
1363 argp_error NEW: argp, GNU ext
1364 argp_failure NEW: argp, GNU ext
1365 argp_help NEW: argp, GNU ext
1366 argp_parse NEW: argp, GNU ext
1367 argp_program_bug_address NEW: argp, GNU ext
1368 argp_program_version NEW: argp, GNU ext
1369 argp_program_version_hook NEW: argp, GNU ext
1370 argp_state_help NEW: argp, GNU ext
1371 argp_usage NEW: argp, GNU ext
1372 authdes_create NEW: Secure RPC
1373 authdes_getucred NEW: Secure RPC
1374 authdes_pk_create NEW: Secure RPC
1375 backtrace NEW: GNU ext.
1376 backtrace_symbols NEW: GNU ext.
1377 backtrace_symbols_fd NEW: GNU ext.
1379 cacosf NEW: ISO C 9x
1380 cacosh NEW: ISO C 9x
1381 cacoshf NEW: ISO C 9x
1382 cacoshl NEW: ISO C 9x
1383 cacosl NEW: ISO C 9x
1390 casinf NEW: ISO C 9x
1391 casinh NEW: ISO C 9x
1392 casinhf NEW: ISO C 9x
1393 casinhl NEW: ISO C 9x
1394 casinl NEW: ISO C 9x
1396 catanf NEW: ISO C 9x
1397 catanh NEW: ISO C 9x
1398 catanhf NEW: ISO C 9x
1399 catanhl NEW: ISO C 9x
1400 catanl NEW: ISO C 9x
1401 cbc_crypt NEW: Secure RPC
1405 ccoshf NEW: ISO C 9x
1406 ccoshl NEW: ISO C 9x
1412 cimagf NEW: ISO C 9x
1413 cimagl NEW: ISO C 9x
1414 clearerr_locked REMOVED
1415 clntunix_create NEW: sunrpc ext
1417 clog10 NEW: ISO C 9x
1418 clog10f NEW: ISO C 9x
1419 clog10l NEW: ISO C 9x
1429 cprojf NEW: ISO C 9x
1430 cprojl NEW: ISO C 9x
1432 crealf NEW: ISO C 9x
1433 creall NEW: ISO C 9x
1438 csinhf NEW: ISO C 9x
1439 csinhl NEW: ISO C 9x
1442 csqrtf NEW: ISO C 9x
1443 csqrtl NEW: ISO C 9x
1447 ctanhf NEW: ISO C 9x
1448 ctanhl NEW: ISO C 9x
1450 des_setparity NEW: Secure RPC
1451 ecb_crypt NEW: Secure RPC
1452 endutxent NEW: Unix98
1454 exp10f NEW: ISO C 9x
1455 exp10l NEW: ISO C 9x
1459 fattach NEW: STREAMS
1460 fdetach NEW: STREAMS
1464 feclearexcept NEW: ISO C 9x
1465 fegetenv NEW: ISO C 9x
1466 fegetexceptflag NEW: ISO C 9x
1467 fegetround NEW: ISO C 9x
1468 feholdexcept NEW: ISO C 9x
1470 feraiseexcept NEW: ISO C 9x
1471 ferror_locked REMOVED
1472 fesetenv NEW: ISO C 9x
1473 fesetexceptflag NEW: ISO C 9x
1474 fesetround NEW: ISO C 9x
1475 fetestexcept NEW: ISO C 9x
1476 feupdateenv NEW: ISO C 9x
1477 fflush_locked REMOVED
1481 fgets_unlocked NEW: GNU ext.
1482 fileno_locked REMOVED
1494 fputc_locked REMOVED
1495 fputs_unlocked NEW: GNU ext.
1496 fread_unlocked NEW: GNU ext.
1501 fstatvfs NEW: Unix98
1505 ftruncate64 NEW: LFS
1507 fwrite_unlocked NEW: GNU ext.
1508 gai_strerror NEW: IPv6
1512 getchar_locked REMOVED
1514 getdate_err NEW: Unix98
1515 getdate_r NEW: GNU ext.
1517 getnameinfo NEW: IPv6
1518 getnetname NEW: Secure RPC
1519 getpmsg NEW: STREAMS
1520 getpt NEW: Unix98 PTY
1521 getrlimit64 NEW: LFS
1522 getutxent NEW: Unix98
1523 getutxid NEW: Unix98
1524 getutxline NEW: Unix98
1525 glob64 NEW: GNU ext.
1526 globfree64 NEW: GNU ext.
1527 gnu_get_libc_release NEW: GNU ext.
1528 gnu_get_libc_version NEW: GNU ext.
1529 grantpt NEW: Unix98 PTY
1530 host2netname NEW: Secure RPC
1532 iconv_close NEW: iconv
1533 iconv_open NEW: iconv
1534 if_freenameindex NEW: IPv6
1535 if_indextoname NEW: IPv6
1536 if_nameindex NEW: IPv6
1537 if_nametoindex NEW: IPv6
1538 in6addr_any NEW: IPv6
1539 in6addr_loopback NEW: IPv6
1540 inet6_isipv4mapped NEW: IPv6
1541 isastream NEW: STREAMS
1542 iswblank NEW: GNU ext.
1543 key_decryptsession NEW: Secure RPC
1544 key_decryptsession_pk NEW: Secure RPC
1545 key_encryptsession NEW: Secure RPC
1546 key_encryptsession_pk NEW: Secure RPC
1547 key_gendes NEW: Secure RPC
1548 key_get_conv NEW: Secure RPC
1549 key_secretkey_is_set NEW: Secure RPC
1550 key_setnet NEW: Secure RPC
1551 key_setsecret NEW: Secure RPC
1552 llrint NEW: ISO C 9x
1553 llrintf NEW: ISO C 9x
1554 llrintl NEW: ISO C 9x
1555 llround NEW: ISO C 9x
1556 llroundf NEW: ISO C 9x
1557 llroundl NEW: ISO C 9x
1562 lrintf NEW: ISO C 9x
1563 lrintl NEW: ISO C 9x
1564 lround NEW: ISO C 9x
1565 lroundf NEW: ISO C 9x
1566 lroundl NEW: ISO C 9x
1568 makecontext NEW: Unix98
1569 mempcpy NEW: GNU ext.
1572 modify_ldt NEW: kernel
1576 nearbyint NEW: ISO C 9x
1577 nearbyintf NEW: ISO C 9x
1578 nearbyintl NEW: ISO C 9x
1579 netname2host NEW: Secure RPC
1580 netname2user NEW: Secure RPC
1581 nexttoward NEW: ISO C 9x
1582 nexttowardf NEW: ISO C 9x
1583 nexttowardl NEW: ISO C 9x
1587 passwd2des NEW: Secure RPC
1589 pow10f NEW: GNU ext.
1590 pow10l NEW: GNU ext.
1593 printf_size NEW: GNU ext.
1594 printf_size_info NEW: GNU ext.
1595 profil_counter REMOVED
1596 pthread_mutexattr_getkind_np REPLACED
1597 pthread_mutexattr_setkind_np REPLACED
1598 ptsname NEW: Unix98 PTY
1599 ptsname_r NEW: Unix98 PTY
1601 putchar_locked REMOVED
1602 putgrent NEW: GNU ext.
1604 putpmsg NEW: STREAMS
1605 pututxline NEW: Unix98
1609 readdir64_r NEW: LFS
1610 remquo NEW: ISO C 9x
1611 remquof NEW: ISO C 9x
1612 remquol NEW: ISO C 9x
1614 roundf NEW: ISO C 9x
1615 roundl NEW: ISO C 9x
1617 scalbln NEW: ISO C 9x
1618 scalblnf NEW: ISO C 9x
1619 scalblnl NEW: ISO C 9x
1621 sendfile NEW: kernel
1622 setcontext NEW: Unix98
1623 setrlimit64 NEW: LFS
1624 setutxent NEW: Unix98
1626 sigignore NEW: Unix98
1627 sigqueue NEW: POSIX.1b
1628 sigrelse NEW: Unix98
1629 sigset NEW: POSIX.1b
1630 sigtimedwait NEW: POSIX.1b
1631 sigwaitinfo NEW: POSIX.1b
1632 sincos NEW: GNU ext.
1633 sincosf NEW: GNU ext.
1634 sincosl NEW: GNU ext.
1638 strcasestr NEW: GNU ext.
1639 strtoimax NEW: ISO C 9x
1640 strtoumax NEW: ISO C 9x
1641 strverscmp NEW: GNU ext.
1642 svcauthdes_stats NEW: Secure RPC
1643 svcunix_create NEW: sunrpc etx
1644 svcunixfd_create NEW: sunrpc ext
1645 swapcontext NEW: Unix98
1646 tcgetsid NEW: Unix98 PTY
1647 tdestroy NEW: GNU ext.
1648 tgamma NEW: ISO C 9x
1649 tgammaf NEW: ISO C 9x
1650 tgammal NEW: ISO C 9x
1654 truncf NEW: ISO C 9x
1655 truncl NEW: ISO C 9x
1657 unlockpt NEW: Unix98 PTY
1658 updwtmpx NEW: Unix98
1659 user2netname NEW: Secure RPC
1660 utmpxname NEW: Unix98
1661 versionsort NEW: GNU ext.
1662 versionsort64 NEW: GNU ext.
1664 wcscasecmp NEW: GNU ext.
1665 wcsncasecmp NEW: GNU ext.
1666 wcsnlen NEW: GNU ext.
1667 wcstoimax NEW: ISO C 9x
1668 wcstoll NEW: ISO C 9x
1669 wcstoull NEW: ISO C 9x
1670 wcstoumax NEW: ISO C 9x
1672 wordexp NEW: POSIX.2
1673 wordfree NEW: POSIX.2
1674 write_profiling REMOVED
1675 xdecrypt NEW: Secure RPC
1676 xdr_authdes_cred NEW: Secure RPC
1677 xdr_authdes_verf NEW: Secure RPC
1678 xdr_cryptkeyarg NEW: Secure RPC
1679 xdr_cryptkeyarg2 NEW: Secure RPC
1680 xdr_cryptkeyres NEW: Secure RPC
1681 xdr_getcredres NEW: Secure RPC
1682 xdr_key_netstarg NEW: Secure RPC
1683 xdr_key_netstres NEW: Secure RPC
1684 xdr_keybuf NEW: Secure RPC
1685 xdr_keystatus NEW: Secure RPC
1686 xdr_netnamestr NEW: Secure RPC
1687 xdr_sizeof NEW: Secure RPC
1688 xdr_unixcred NEW: sunrpc ext
1689 xencrypt NEW: Secure RPC
1690 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1701 * inet_ntoa is thread-safe
1703 * updwtmp is moved from libutil to libc
1705 * rewrite of cbrt function
1707 * update of timezone data
1721 * add atoll function
1723 * fix complex problems in Berkeley DB code
1725 * fix math functions
1729 * fixed lots of header problems (especially Linux/GNU specific)
1731 * dynamic loader preserves all registers
1733 * Roland McGrath provided support for handling of auxiliary objects in
1734 the ELF dynamic loader.
1736 * support for parallel builds is improved
1740 * GNU extensions are no longer declared by default. To enable them you
1741 must define the macro `_GNU_SOURCE' in your program or compile with
1744 * The library has changed from using GNU ld symbol aliases to using weak
1745 symbols where available. The ELF object file format supports weak
1746 symbols; GNU ld also supports weak symbols in the a.out format. (There
1747 is also now support for other GNU ld extensions in ELF. Use the
1748 `--with-elf' option to configure to indicate you have ELF, and
1749 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1750 of many files which contained only symbol aliases, reducing the size of
1751 the source and the compiled library; many other files were renamed to
1752 less cryptic names previously occupied by the symbol alias files.
1753 There is a new header file <elf.h> for programs which operate on
1754 files in the ELF format.
1756 * Converted to Autoconf version 2, so `configure' has more options.
1757 Run `configure --help' to see the details.
1759 * The library can now be configured to build profiling, highly-optimized
1760 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1761 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1762 `configure' enable building these extra libraries. The shared library is
1763 built by default when using both ELF and GNU ld. When shared libraries
1764 are enabled, the new library `-ldl' is available for arbitrary run-time
1765 loading of shared objects; its interface is defined in <dlfcn.h>. The
1766 new header file <link.h> gives access to the internals of the run-time
1767 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1768 application of same name on other systems and it provides information
1769 about dynamically linked binaries.
1771 * The C library now provides the run-time support code for profiling
1772 executables compiled with `-pg'. Programs can control the profiling code
1773 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1774 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1775 the support for this file format was contributed by David Mosberger-Tang.
1777 * The math code has been replaced with a math library based on fdlibm from
1778 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1779 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1780 functions. The math functions now reside in a separate library, so
1781 programs using them will need to use `-lm' their linking commands.
1783 * John C. Bowman contributed optimized ix87 assembler inline functions.
1785 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1786 mechanism similar to that found in Solaris 2. This is now used for the
1787 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1788 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1789 file controls what services are used for each individual database. This
1790 works by loading shared libraries with names specified in `nsswitch.conf',
1791 so service modules can be changed or added at any time without even
1792 relinking any program. Currently there are the file, db, and NIS based
1793 NSS services available.
1795 * The new functions `strtoq' and `strtouq' parse integer values from
1796 strings, like `strtol' and `strtoul', but they return `long long int' and
1797 `unsigned long long int' values, respectively (64-bit quantities).
1799 * The new functions `strtof' and `strtold' parse floating-point values from
1800 strings, like `strtod', but they return `float' and `long double' values,
1801 respectively (on some machines `double' and `long double' are the same).
1803 * Ulrich Drepper has contributed new implementations of the floating-point
1804 printing and reading code used in the `printf' family of functions and
1805 `strtod', `strtof', and `strtold'. These new functions are perfectly
1806 accurate, and much faster than the old ones.
1808 * The implementation of the POSIX locale model was completely rewritten by
1809 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1810 to compile the POSIX locale definition.
1812 * The former dummy implementations of the strcoll and strxfrm function are
1813 now replaced by fully functional code contributed by Ulrich Drepper. The
1814 collation information comes from the POSIX locale definitions.
1816 * The new header <langinfo.h> defines an interface for accessing
1817 various locale-dependent data (using the locale chosen with `setlocale').
1819 * Ulrich Drepper has contributed a new suite of functions for operation on
1820 wide-character and multibyte-character strings, in <wchar.h>;
1821 and classification and case conversion of wide characters, in <wctype.h>.
1822 These new functions are conforming to the ISO C, Amendement 1 specification.
1824 * There is now a second implementation of the standard I/O library available.
1825 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1826 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1828 * You can now use positional parameter specifications in format strings
1829 for the `printf' and `scanf' families of functions. For example,
1830 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1831 ``Number 6, Mr Jones''. This is mainly useful when providing different
1832 format strings for different languages, whose grammars may dictate
1833 different orderings of the values being printed. To support this
1834 feature, the interface for `register_printf_handler' has changed; see
1835 the header file <printf.h> for details.
1837 * The `printf' and `scanf' families of functions now understand a new
1838 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1839 to group numbers as indicated by the locale; for `scanf' and friends, this
1840 says to accept as valid only a number with all the proper grouping
1841 separators in the right places. In the default "C" locale, numbers are
1842 not grouped; but locales for specific countries will define the usual
1843 conventions (i.e. separate thousands with `,' in the US locale).
1845 * The pgrp functions have been regularized, slightly incompatibly but much
1846 less confusingly. The core functions are now `getpgid' and `setpgid',
1847 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1848 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1849 provided for compatibility. There is no longer an incompatible `getpgrp'
1850 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1852 * The new header file <fts.h> and suite of functions simplify programs that
1853 operate on directory trees. This code comes from 4.4 BSD.
1855 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1856 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1857 NSS scheme used in glibc.
1859 * There is a new malloc debugging hook `__memalign_hook'.
1861 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1862 `unsigned int' in <sys/types.h>. These are for compatibility only and
1863 their use is discouraged.
1865 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1866 done differently, so that it works even without GNU ld.
1868 * New function `euidaccess' checks allowed access to a file like `access',
1869 but using the effective IDs instead of the real IDs.
1871 * The time zone data files have been updated for the latest and greatest
1872 local time conventions of the countries of the world.
1874 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1877 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1878 for formatting floating-point numbers. They are provided only for
1879 compatibility; new programs should use `sprintf' instead. There are
1880 also equivalent function for the `long double' floating-point type and
1881 all functions also exist in a reentrant form.
1883 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1884 functions for maintaining the login-record files (primarily of use to
1885 system programs such as `login'), and convenient functions for
1886 allocating and initializing a pseudo-terminal (pty) device.
1888 * Ulrich Drepper has contributed new support for System V style
1889 shared memory and IPC on systems that support it.
1891 * Ulrich Drepper has contributed several miscellaneous new functions found
1892 in System V: The `hsearch' family of functions provide an effective
1893 implementation of hash tables; `a64l' and `l64a' provide a very simple
1894 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1897 * Ulrich Drepper has contributed new reentrant counterparts for the
1898 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1900 * Ulrich Drepper has contributed new, highly-optimized versions of several
1901 string functions for the i486/Pentium family of processors.
1903 * Ulrich Drepper has updated the Linux-specific code, based largely
1904 on work done in Hongjiu Lu's version of GNU libc for Linux.
1905 The GNU library now supports Linux versions 2.0.10 and later,
1906 using the ELF object file format (i[3456]86-*-linux).
1908 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1910 * David Mosberger-Tang and Richard Henderson have ported the C library
1911 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1912 dynamic linking support for ELF/Alpha.
1914 * Richard Henderson contributed several Alpha optimized assembler function
1915 for arithmetic and string handling.
1917 * Ulrich Drepper has contributed a new set of message catalog functions to
1918 support multiple languages using the <libintl.h> interface, for use with
1919 his new package GNU gettext. Translation volunteers have contributed
1920 catalogs of the library's messages in Spanish, German, and Korean.
1922 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1923 program and the `catgets' function for reading the catalog files it
1924 creates. (The <libintl.h> interface is preferred; we include the
1925 <nl_types.h> interface using `catgets' only for source compatibility with
1926 programs already written to use it.)
1928 * New header file <values.h> gives SVID-compatible names for <limits.h>
1931 * Various new macros, declarations, and small header files for compatibility
1934 * New function `group_member' is a convenient way to check if a process has
1935 a given effective group ID.
1937 * When using GCC 2.7 and later, the socket functions are now declared in a
1938 special way so that passing an argument of type `struct sockaddr_in *',
1939 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1940 `struct sockaddr *' type, does not generate a type-clash warning.
1942 * New function `error' declared in header file <error.h> is a convenient
1943 function for printing error messages and optionally exiting; this is the
1944 canonical function used in GNU programs. The new functions `err', `warn',
1945 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1946 doing the same thing.
1948 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1949 POSIX.2 `glob' function to do ~ and {...} expansion.
1951 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1952 `clearenv' which is used in POSIX.9 is also available.
1954 * New function `getsid' returns session ID number on systems that support it.
1956 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1957 files <db.h> and <mpool.h> provide a rich set of functions for several
1958 types of simple databases stored in memory and in files, and <ndbm.h> is
1959 an old `ndbm'-compatible interface using the `db' functions. Link with
1960 `-ldb' to get these functions.
1962 * New macro `strdupa' copies a string like `strdup', but uses local stack
1963 space from `alloca' instead of dynamic heap space from `malloc'.
1965 * New function `strnlen' is like `strlen' but searches only a given maximum
1966 number of characters for the null terminator. `stpncpy', `strndup' and
1967 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1970 * New function `statfs' in header <sys/statfs.h>.
1972 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1973 provide convenient functions for operating on blocks of null-terminated
1976 * A new suite of functions in <utmp.h> handle all the details of reading
1977 and writing the utmp file.
1979 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1982 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1983 completely POSIX compliant and also implemented the extended functionality
1984 to handle alternate digit representation and alternate era date formats.
1986 * Ulrich Drepper provided an implementation of the `strptime' function
1987 defined in XPG4.2 which transforms a string into a `struct tm' value.
1989 * Paul Eggert provided the tzselect shell script as part of the timezone
1990 code. The shell script makes it easy to select the correct timezone
1993 * The implementation of the malloc family of functions is completely replaced
1994 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1995 The implementation uses the mmap function (if available) and it is
1996 optimized for the use in multi threaded programs.
1998 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1999 functions. This new functionality is usable by specifying a special
2000 salt string and it is compatible with implementation on *BSD systems.
2002 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2003 `getsubopt' to handle second level command line options, `bsd_signal'
2004 to access BSD style `signal' functionality, the obsolete `regexp' style
2007 * the `lchown' function is available on system which support this
2010 * The implementation of the shadow password handling function was contributed
2013 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2015 * POSIX.1g support was added. The <sys/select.h> header is available,
2016 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2017 implementation of `getaddrinfo'.
2021 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2023 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2024 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2026 * The new function `daemon' from 4.4 BSD is useful for server programs that
2027 want to put themselves in the background.
2029 * Joel Sherrill has contributed support for several standalone boards that
2030 run without an operating system.
2032 * `printf', `scanf' and friends now accept a `q' type modifier for long
2033 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2035 * All of the code taken from BSD (notably most of the math and networking
2036 routines) has been updated from the BSD 4.4-Lite release.
2038 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2040 * The new functions `getdomainname' and `setdomainname' fetch or change the
2041 YP/NIS domain name. These are system calls which exist on systems which
2044 * The time zone data files have been updated for the latest international
2047 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2048 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2052 * The C library now includes support for Sun RPC, from Sun's free
2053 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2054 are included. (There is still no support for YP.)
2056 * Tom Quinn has contributed a port of the C library to SGI machines running
2057 Irix 4 (mips-sgi-irix4).
2059 * The new `lockf' function is a simplified interface to the locking
2060 facilities of `fcntl', included for compatibility.
2062 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2064 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2066 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2069 * The error message printed by `assert' for a failed assertion now includes
2070 the name of the program (if using GNU ld) and the name of the calling
2071 function (with versions of GCC that support this).
2073 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2075 * The library now includes the <sys/mman.h> header file and memory
2076 management functions `mmap', `munmap', `mprotect', `msync', and
2077 `madvise', on systems that support those facilities.
2079 * The interface for `mcheck' has changed slightly: the function called to
2080 abort the program when an allocation inconsistency is detected now takes
2081 an argument that indicates the type of failure. The new function
2082 `mprobe' lets you request a consistency check for a particular block at
2083 any time (checks are normally done only when you call `free' or `realloc'
2086 * It is now possible to easily cross-compile the C library, building on one
2087 system a library to run on another machine and/or operating system. All
2088 you need to do is set the variable `HOST_CC' in `configparms' to the
2089 native compiler for programs to run on the machine you are building on (a
2090 few generator programs are used on Unix systems); set `CC' to the
2093 * The new function `fexecve' (only implemented on the GNU system) executes
2094 a program file given a file descriptor already open on the file.
2098 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2099 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2101 * You can set the variable `libprefix' in `configparms' to specify a prefix
2102 to be prepended to installed library files; this makes it easy to install
2103 the GNU C library to be linked as `-lgnuc' or whatever.
2105 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2106 copies a limited number of characters from a string, and returns the
2107 address of the last character written.
2109 * You no longer need to check for whether the installed `stddef.h' is
2110 compatible with the GNU C library. configure now checks for you.
2112 * You can now define a per-stream `fileno' function to convert the
2113 stream's cookie into an integral file descriptor.
2115 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2116 allocates zero bytes of storage, and returns a unique pointer which
2117 you can pass to `realloc' or `free'. The behavior is undefined if
2118 you dereference this pointer.
2120 * The C library now runs on Sony NEWS m68k machines running either
2121 NewsOS 3 or NewsOS 4.
2123 * The new `syscall' function is a system-dependent primitive function
2124 for invoking system calls. It has the canonical behavior on Unix
2125 systems, including unreliable return values for some calls (such as
2126 `pipe', `fork' and `getppid').
2128 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2129 to `EAGAIN', which is the preferred name. On systems whose kernels
2130 use two distinct codes, the C library now translates EWOULDBLOCK to
2131 EAGAIN in every system call function.
2135 * The GNU C Library Reference Manual is now distributed with the library.
2136 `make dvi' will produce a DVI file of the printed manual.
2137 `make info' will produce Info files that you can read on line using C-h i
2138 in Emacs or the `info' program.
2139 Please send comments on the manual to bug-glibc-manual@gnu.org.
2141 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2143 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2145 * Jason Merrill has contributed a port to the Sequent Symmetry running
2146 Dynix version 3 (i386-sequent-dynix).
2148 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2149 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2151 * New function `memory_warnings' lets you arrange to get warnings when
2152 malloc is running out of memory to allocate, like Emacs gives you.
2154 * The C library now contains the relocating allocator used in Emacs 19 for
2155 its editing buffers. This allocator (ralloc) minimizes allocation
2156 overhead and fragmentation by moving allocated regions around whenever it
2157 needs to. You always refer to a ralloc'd region with a "handle" (a
2158 pointer to a pointer--an object of type `void **').
2160 * There is a new `printf' format: `%m' gives you the string corresponding
2161 to the error code in `errno'.
2163 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2164 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2165 pass, the `a' modifier says to fill in a `char **' you pass with a
2168 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2169 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2170 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2172 * `mkstemp' is a traditional Unix function to atomically create and open a
2173 uniquely-named temporary file.
2177 * The standard location for the file that says what the local timezone is
2178 has changed again. It is now `/usr/local/etc/localtime' (or more
2179 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2181 * The distribution no longer contains any files with names longer than 14
2184 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2185 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2187 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2191 * The configuration process has changed quite a bit. The `configure'
2192 script is now used just like the configuration scripts for other GNU
2193 packages. The `sysdeps' directory hierarchy is much rearranged.
2194 The file `INSTALL' explains the new scheme in detail.
2196 * The header files no longer need to be processed into ANSI C and
2197 traditional C versions. There is just one set of files to install, and
2198 it will work with ANSI or old C compilers (including `gcc -traditional').
2200 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2201 MIPS DECStation running Ultrix 4.
2203 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2204 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2205 made itself into a shared library.
2207 * Yet further improved support for the i386, running 4.3 BSD-like systems
2208 (such as Mach 3 with the Unix single-server), or System V.
2210 * New function `strncasecmp' to do case-insensitive string comparison
2211 with limited length.
2213 * New function `strsep' is a reentrant alternative to `strtok'.
2215 * New functions `scandir' and `alphasort' for searching directories.
2217 * New function `setenv' is a better interface to `putenv'.
2219 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2220 function for traversing a directory tree.
2222 * The GNU obstack package is now also part of the C library.
2223 The new function `open_obstack_stream' creates a stdio stream that
2224 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2225 formatted output directly to an obstack.
2227 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2228 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2230 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2232 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2233 things to your strings.
2235 * There are some new test programs: test-fseek, testmb, and testrand.
2237 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2238 These ports are not finished, but are a good starting place for really
2239 supporting those systems.
2241 * `/etc/localtime' is now the standard location for the file that says what
2242 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2243 This follows the general principle that `/etc' is the place for all local
2244 configuration files.
2246 * The C library header files now use `extern "C"' when used by the C++
2247 compiler, so the C library should now work with C++ code.
2249 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2250 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2253 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2254 function which uses the `merge sort' algorithm, and is said to be
2255 significantly faster than the old GNU `qsort' function. Merge sort is
2256 now the standard `qsort' function. The new algorithm can require a lot
2257 of temporary storage; so, the old sorting function is called when the
2258 required storage is not available.
2260 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2261 provides the Unix `crypt' function, plus some other entry points.
2263 * The code and header files taken from 4.4 BSD have been updated with the
2264 latest files released from Berkeley.
2266 ----------------------------------------------------------------------
2267 Copyright information:
2269 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2271 Permission is granted to anyone to make or distribute verbatim copies
2272 of this document as received, in any medium, provided that the
2273 copyright notice and this permission notice are preserved,
2274 thus giving the recipient permission to redistribute in turn.
2276 Permission is granted to distribute modified versions
2277 of this document, or of portions of it,
2278 under the above conditions, provided also that they
2279 carry prominent notices stating who last changed them.
2282 version-control: never