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:
16 * The following bugs are resolved with this release:
18 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
19 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
20 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
21 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
22 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
23 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
24 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
25 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
26 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
27 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
28 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
29 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
30 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
33 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
34 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
35 Distributions can re-enable building and using pt_chown via the new configure
36 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
37 considerable security risks and should only be used if the distribution
38 understands and accepts the risks.
40 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
43 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
44 fixed (Bugzilla #15330).
46 * Add support for calling C++11 thread_local object destructors on thread
47 and program exit. This needs compiler support for offloading C++11
48 destructor calls to glibc.
50 * Improved worst case performance of libm functions with double inputs and
53 * Support for priority inherited mutexes in pthread condition variables on
54 non-x86 architectures.
56 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
58 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
60 * Optimized string functions for ARM. Implemented by Will Newton and
63 * Optimized libm functions for SPARC. Implemented by David S. Miller.
65 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
68 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
69 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
71 * Added a benchmark framework to track performance of functions in glibc.
73 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
74 It is based on draft TS 18661 and currently enabled as a GNU extension.
76 * On Linux, the clock function now uses the clock_gettime system call
77 for improved precision, rather than old times system call.
79 * Added new API functions pthread_getattr_default_np and
80 pthread_setattr_default_np to get and set the default pthread
81 attributes of a process.
83 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
84 This may improve lock scaling of existing programs on TSX capable systems.
85 When the --enable-lock-elision=yes parameter is specified at configure
86 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
89 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
90 availability). Implemented by Ryan S. Arnold.
92 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
96 * The following bugs are resolved with this release:
98 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
99 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
100 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
101 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
102 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
103 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
104 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
105 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
106 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
107 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
108 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
109 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
110 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
111 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
112 14879, 14889, 14893, 14898, 14914.
114 * Optimization of memcpy for MIPS.
116 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
117 EMFILE has been fixed (Bugzilla #14889).
119 * The add-on ports collection is now distributed in the "ports" subdirectory
120 of the main GNU C Library distribution, rather than separately.
122 * Port to ARM AArch64 contributed by Linaro.
124 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
125 Optimized versions of memcpy, memset, and memcmp added for System z10 and
127 Implemented by Andreas Krebbel.
129 * The new function secure_getenv allows secure access to the environment,
130 returning NULL if running in a SUID/SGID process. This function replaces
131 the internal function __secure_getenv.
133 * SystemTap static probes have been added into the dynamic linker.
134 Implemented by Gary Benson.
136 * Optimizations of string functions strstr, strcasestr and memmem.
137 Implemented by Maxim Kuvyrkov.
139 * The minimum Linux kernel version that this version of the GNU C Library
140 can be used with is 2.6.16.
142 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
143 powerpc POWER7. Implemented by Will Schmidt.
145 * New configure option --disable-nscd builds the C library such that it
146 never attempts to contact the Name Service Caching Daemon (nscd).
147 New configure option --disable-build-nscd avoids building nscd itself;
148 this is the default if --disable-nscd is used.
150 * Improved support for cross-compilation, including cross-testing and
151 bootstrap builds without a previously built glibc.
153 * Several testsuite tests are now able to test multiple IFUNC variants of an
154 interface, rather than just testing the one that would be chooen by
157 * New configure options --with-bugurl and --with-pkgversion, for
158 distributors to use to embed their bug-reporting and package version
159 information in --help and --version output.
161 * The ttyname and ttyname_r functions on Linux now fall back to searching for
162 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
163 allows creation of chroots without the procfs mounted on /proc.
165 * The `crypt' function now fails if passed salt bytes that violate the
166 specification for those values. On Linux, the `crypt' function will
167 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
168 enabled, and fail on encrypted strings using the MD5 or DES algorithm
169 when the mode is enabled.
171 * The `clock_*' suite of functions (declared in <time.h>) is now available
172 directly in the main C library. Previously it was necessary to link with
173 -lrt to use these functions. This change has the effect that a
174 single-threaded program that uses a function such as `clock_gettime' (and
175 is not linked with -lrt) will no longer implicitly load the pthreads
176 library at runtime and so will not suffer the overheads associated with
177 multi-thread support in other code such as the C++ runtime library.
179 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
184 * The following bugs are resolved with this release:
186 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
187 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
188 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
189 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
190 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
191 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
192 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
193 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
194 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
195 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
196 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
197 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
198 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
199 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
200 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
201 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
202 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
203 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
204 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
205 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
206 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
207 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
210 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
211 configuring glibc with:
212 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
213 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
214 Implemented by H.J. Lu.
218 + define static_assert
220 + do not declare gets
222 + declare at_quick_exit and quick_exit also for ISO C11
224 + aligned_alloc. NB: The code is deliberately allows the size parameter
225 to not be a multiple of the alignment. This is a moronic requirement
226 in the standard but it is only a requirement on the caller, not the
231 + uchar.h support added
233 + CMPLX, CMPLXF, CMPLXL added
235 Implemented by Ulrich Drepper.
237 * Support for the IA-64 has been moved to ports.
239 * Remove support for anything but ELF binary format
241 * Checking versions of poll, ppoll added.
242 Implemented by Ulrich Drepper.
244 * More generic and 64-bit performance optimizations to math functions.
245 Implemented by Ulrich Drepper.
247 * New configure option --enable-obsolete-rpc makes the deprecated RPC
248 headers and functions available at compile time as they were before
249 version 2.14. This option will be removed at some time in the future
250 after the TI-RPC library becomes fully sufficient for the needs of
251 existing applications.
253 * Compatibility code for Linux kernel versions before 2.4 has been removed.
254 Note that glibc is not expected to work with any Linux kernel version
257 * New header <sys/auxv.h> and function getauxval allowing easy access to
258 the AT_* key-value pairs passed from the Linux kernel. The header also
259 defines the HWCAP_* bits associated with the AT_HWCAP key.
261 * New locales: mag_IN
263 * New configure option --enable-systemtap builds SystemTap static probes
264 into libc for setjmp and longjmp and into libpthread for various operations.
265 So far the setjmp/longjmp probes and some of the libpthread probes are
266 provided only for i*86 and x86_64.
267 Implemented by Roland McGrath and Rayson Ho.
269 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
271 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
274 * More optimized functions for SPARC. Implemented by David S. Miller.
276 * Improved support for cross-compilation, especially bootstrap builds
277 without a previously built glibc.
279 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
280 Chris Metcalf from Tilera.
282 * Support for the old ARM ABI has been removed from ports. Only the EABI is
283 now supported for ARM processors.
285 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
286 as the name of the dynamic linker, to distinguish it from the
287 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
289 * Support for CRIS has been removed from ports.
291 * A new class of installed header has been documented for low-level
292 platform-specific functionality. PowerPC added the first instance with a
293 function to provide time base register access. Contributed by Tulio
294 Magno Quites Machado Filho.
296 * ix86 configurations now install header files that are consistent with
297 what x86-64 configurations install. These same header files can be used
298 for -m32, -m64, or -mx32 builds.
299 Contributed by H.J. Lu.
301 * Math library bug fixes. A thorough audit of all open math library bugs was
302 conducted by Joseph Myers. Significant progress was made on many math
303 library bugs resulting in more accurate exceptions and function results.
304 Many thanks to all those that contributed including Andreas Jaeger for his
305 patch review and work on the x87 trigonometric instruction issues.
307 * Timezone data is no longer installed. Timezone-related binaries and scripts
308 will continue to be installed. Users should obtain their timezone data from
309 their distribution provider or from the tzdata package at
310 <ftp://munnari.oz.au/pub/>.
314 * The following bugs are resolved with this release:
316 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
317 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
318 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
319 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
320 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
321 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
322 13484, 13506, 13515, 13523, 13524, 13538, 13540
324 * New program pldd to list loaded object of a process
325 Implemented by Ulrich Drepper.
327 * Add nss_db support back to glibc. No more dependency on Berkeley db
328 and support for initgroups lookups.
329 Implemented by Ulrich Drepper.
331 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
332 Contributed by HJ Lu.
334 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
335 Contributed by HJ Lu.
337 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
338 on x86-32 and x86-64.
339 Contributed by Liubov Dmitrieva.
341 * Optimized strchr and strrchr for SSE on x86-32.
342 Contributed by Liubov Dmitrieva.
344 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
345 for x86-64 and x86-32.
346 Contributed by Liubov Dmitrieva.
348 * New interfaces: scandirat, scandirat64
349 Implemented by Ulrich Drepper.
351 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
352 Implemented by Ulrich Drepper.
354 * nscd now also caches the netgroup database.
355 Implemented by Ulrich Drepper.
357 * Integrate libm with gcc's -ffinite-math-only option.
358 Implemented by Ulrich Drepper.
360 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
361 to math functions. Implemented by Ulrich Drepper.
363 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
364 Implemented by Ulrich Drepper.
366 * New Linux interfaces: process_vm_readv, process_vm_writev
368 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
369 Implemented by Ulrich Drepper.
371 * Optimized nearbyint and strcasecmp for PPC.
372 Implemented by Adhemerval Zanella.
374 * New locales: bho_IN, unm_US, es_CU, ta_LK
378 * The following bugs are resolved with this release:
380 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
381 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
382 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
383 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
384 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
385 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
386 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
387 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
388 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
389 12795, 12811, 12813, 12814, 12841
391 * The RPC implementation in libc is obsoleted. Old programs keep working
392 but new programs cannot be linked with the routines in libc anymore.
393 Programs in need of RPC functionality must be linked against TI-RPC.
394 The TI-RPC implementation is IPv6 enabled and there are other benefits.
396 Visible changes of this change include (obviously) the inability to link
397 programs using RPC functions without referencing the TI-RPC library and the
398 removal of the RPC headers from the glibc headers.
399 Implemented by Ulrich Drepper.
401 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
402 syncfs, setns, sendmmsg
404 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
405 yue_HK, lij_IT, mhr_RU
407 * New encodings: CP770, CP771, CP772, CP773, CP774
409 * New program sotruss to trace calls through PLTs
410 Implemented by Ulrich Drepper.
412 * The malloc hook implementation is marked deprecated and will be removed
413 from the default implementation in the next version. The design never
414 worked ever since the introduction of threads. Even programs which do
415 not create threads themselves can use multiple threads created internally.
419 * The following bugs are resolved with this release:
421 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
422 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
423 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
424 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
427 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
429 * POWER7 optimizations: memset, memcmp, strncmp
431 * New optimized string functions for x86-64: strnlen (SSE2),
432 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
433 Implemented by Ulrich Drepper.
437 * The following bugs are resolved with this release:
439 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
440 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
441 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
442 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
443 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
444 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
445 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
446 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
448 * New interfaces: pthread_getname_np, pthread_setname_np
450 * New Linux interface: recvmmsg
452 * STT_GNU_IFUNC implemented for Sparc by David Miller.
454 * The dynamic linker now recognizes supported ABI versions from the
455 EI_ABIVERSION field in the ELF header.
456 Implemented by Ulrich Drepper.
458 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
459 will not be used to fill in password fields in the passwd.byname replies.
460 Instead it is used to synthesize the shadow.byname table, should it be
461 missing. This is a useful mode in some installations involving Solaris.
462 Implemented by Ulrich Drepper.
464 * New locales: kok_IN, sq_MK, cv_RU
468 * The following bugs are resolved with this release:
470 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
471 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
472 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
473 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
474 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
475 10789, 10817, 10823, 10840, 10847
477 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
479 Implemented by Ulrich Drepper.
481 * Checking version of longjmp added that fails if an uninitialized stack
482 frame would be created. Implemented by Ulrich Drepper.
484 * STT_GNU_IFUNC is now supported in static executables.
485 Implemented by H.J. Lu.
487 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
489 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
490 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
491 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
492 Contributed by H.J. Lu.
494 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
495 Implemented by Ulrich Drepper.
497 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
499 Contributed by H.J. Lu.
501 * Support for fma instruction in AVX on x86-64.
502 Implemented by H.J. Lu and Ulrich Drepper.
504 * AVX support in x86-64 auditing support in ld.so.
505 Implemented by H.J. Lu.
507 * STB_GNU_UNIQUE support added.
508 Implemented by Ulrich Drepper.
510 * Implement second fallback mode for optimized DNS lookup for even more
511 broken environments. If two requests from the same port are not
512 handled correctly close the socket and open a new one before sending
513 the second request. The 'single-request-reopen' option in /etc/resolv.conf
514 can be used to select this mode right away, instead of rediscovering the
515 necessity is every process again.
516 Implemented by Ulrich Drepper.
518 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
519 Implemented by Adam Tkac.
521 * Optimized iconv conversions for S390x.
522 Implemented by Andreas Krebbel.
524 * Using condvars with PI mutexes is now more efficient due to kernel
525 support for requeueing to PI futexes. NPTL support added for x86-64.
526 Implemented by Ulrich Drepper.
528 * New locales: ps_AF, my_MM
532 * The following bugs are resolved with this release:
534 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
535 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
536 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
537 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
538 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
540 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
541 Implemented by Ulrich Drepper.
543 * New Linux interfaces: accept4, fallocate, fallocate64.
544 Implemented by Ulrich Drepper.
546 * Correct declarations of string function when used in C++ code. This
547 could lead to compile errors for invalid C++ code.
549 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
552 * New POSIX 2008 interface: psiginfo
553 Implemented by Ulrich Drepper.
555 * New ISO C++1x interfaces: quick_exit, at_quick_exit
556 Implemented by Ulrich Drepper.
558 * Support for selecting between multiple function definitions at runtime
559 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
561 * The libcrypt library can now use the hash function implementations in
562 NSS. Implemented by Ulrich Drepper.
564 * The malloc implementation can be compiled to be less memory efficient
565 but higher performing in multi-threaded programs.
566 Implemented by Ulrich Drepper.
568 * New locales: nan_TW@latin, ks_IN
570 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
571 Implemented by Ulrich Drepper.
573 * Extended printf hook support. It is possible to use user-defined types
574 and extend existing format specifiers.
575 Implemented by Ulrich Drepper.
577 * Handling for group shadow files has been added.
578 Implemented by Ulrich Drepper.
580 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
581 servers (the case, e.g., for some people using the built-in DNS
582 server in ADSL modems/routers). There is a once-per-process timeout
583 in case of a broken server. To avoid it, users can run nscd or put
584 'options single-request' in /etc/resolv.conf.
585 Implemented by Ulrich Drepper.
589 * The following bugs are resolved with this release:
591 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
592 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
593 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
594 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
595 6968, 6974, 6980, 6995, 7008, 7009, 7029
597 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
598 up at the same time. Implemented by Ulrich Drepper.
600 * TLS descriptors for LD and GD on x86 and x86-64.
601 Implemented by Alexandre Oliva.
603 * getaddrinfo now handles DCCP and UDPlite.
604 Implemented by Ulrich Drepper.
606 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
607 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
608 Implemented by Ulrich Drepper.
610 * New implementation of memmem, strstr, and strcasestr which is O(n).
611 Implemented by Eric Blake.
613 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
615 * Implement "e" option for popen to open file descriptor with the
616 close-on-exec flag set. Implemented by Ulrich Drepper.
618 * Implement "b" mode for fmemopen. In this mode writes writes don't
619 implicitly add a NUL byte and seeks from the end of the buffer really
620 use the buffer end, not the string length as the basis.
621 Implemented by Ulrich Drepper.
623 * Many functions, exported and internal, now atomically set the close-on-exec
624 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
626 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
628 Implemented by Pravin Satpute.
630 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
634 * The following bugs are resolved with this release:
636 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
637 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
638 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
639 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
640 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
641 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
642 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
644 * New locales: bo_CN, bo_IN, shs_CA.
646 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
648 * Sorting rules for some Indian languages (Devanagari and Gujarati).
649 Implemented by Pravin Satpute.
651 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
653 * nscd caches now all timeouts for DNS entries
654 Implemented by Ulrich Drepper.
656 * nscd is more efficient and wakes up less often.
657 Implemented by Ulrich Drepper.
659 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
660 vdprintf, and obstack_vprintf.
661 Implemented by Jakub Jelinek.
663 * Faster memset for x86-64.
664 Implemented by Harsha Jagasia and H.J. Lu.
666 * Faster memcpy on x86.
667 Implemented by Ulrich Drepper.
669 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
670 Implemented by Ulrich Drepper.
672 * Faster sqrt and sqrtf implemention for some PPC variants.
673 Implemented by Steven Munroe.
677 * The following bugs are resolved with this release:
679 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
680 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
681 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
682 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
683 5071, 5103, 5104, 5112, 5113, 5184, 5186
685 * More checking functions: fread, fread_unlocked, open*, mq_open.
686 Implemented by Jakub Jelinek and Ulrich Drepper.
688 * Extend fortification to C++. Implemented by Jakub Jelinek.
690 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
691 by not recognizing 'a' as a modifier when those specs are requested.
692 Implemented by Jakub Jelinek.
694 * PPC optimizations to math and string functions.
695 Implemented by Steven Munroe.
697 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
698 options to be passed. Implemented by Ulrich Drepper.
700 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
702 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
703 Implemented by Ulrich Drepper.
705 * Handle private futexes in the NPTL implementation.
706 Implemented by Jakub Jelinek and Ulrich Drepper.
708 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
709 Implemented by Roland McGrath and Ulrich Drepper.
711 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
713 * SHA-256 and SHA-512 based password encryption.
714 Implemented by Ulrich Drepper.
716 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
717 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
720 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
721 Implemented by Ulrich Drepper.
725 * The following bugs are resolved with this release:
727 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
728 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
729 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
730 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
731 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
732 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
733 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
736 * New Linux interfaces: epoll_pwait, sched_getcpu.
738 * New generic interfaces: strerror_l.
740 * nscd can now cache the services database. Implemented by Ulrich Drepper.
744 * The following bugs are resolved with this release:
746 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
747 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
748 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
749 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
750 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
751 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
752 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
753 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
754 3225, 3251, 3252, 3253, 3273
756 * For Linux, the sorting of addresses returned by getaddrinfo now also
757 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
758 Implemented by Ulrich Drepper.
760 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
761 Implemented by Ulrich Drepper.
763 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
765 * New iconv module for MIK. Contributed by Alexander Shopov.
767 * For sites with broken group and/or passwd database, the auto-propagate
768 option of nscd can prevent creating ID lookup entries from the results
769 of a name lookup and vice versa. This usually is no problem but some
770 site might have problems with the default behavior.
771 Implemented by Ulrich Drepper.
773 * Iterating over entire database in NIS can be slow. With the
774 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
775 to trade time for memory. The entire database will be read at once.
776 Implemented by Ulrich Drepper.
778 * The interfaces introduced in RFC 3542 have been implemented by
781 * Support for the new ELF hash table format was added by Ulrich Drepper.
783 * Support for priority inheritance mutexes added by Jakub Jelinek and
786 * Support for priority protected mutexes added by Jakub Jelinek.
788 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
789 or_IN, csb_PL, fy_NL, sr_ME.
793 * More overflow detection functions.
795 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
796 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
798 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
799 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
800 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
801 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
802 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
803 by Masahide Washizawa.
805 * It is now possible to install audit libraries for the dynamic linker using
806 LD_AUDIT. Implemented by Ulrich Drepper.
808 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
809 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
810 For a libc and libpthread that works well on Linux 2.4 kernels, we
811 recommend using the stable 2.3 branch.
813 * The new function open_wmemstream acts like open_memstream,
814 but uses a wchar_t wide character buffer.
816 * The new function ppoll is an improved version of poll, similar to pselect.
818 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
819 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
820 renameat, unlinkat, linkat, symlinkat, readlinkat.
822 * New Linux kernel system calls: unshare,
823 inotify_init, inotify_add_watch, inotify_rm_watch.
825 * The euidaccess function is now also known by the alias eaccess,
826 for compatibility with some other systems.
828 * Timezone data updated to 2006b version.
832 * The following bugs are resolved with this release:
834 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
835 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
836 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
837 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
838 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
839 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
841 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
843 * As of this release, GCC 4 can be used to compile the C Library.
845 * Timezone data updated to 2005m version.
849 * The following bugs are resolved with this release:
851 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
852 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
853 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
854 777, 787, 821, 822, 823, 825
856 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
860 * Support for RFC 3678. Real implementations exist only for Linux so far.
861 Implemented by Ulrich Drepper.
863 * nscd can now cache entries persistently. Expiring entries are reloaded.
864 For speedups the cache can be shared in memory with client processes.
865 Implemented by Ulrich Drepper.
867 * nscd can now perform SELinux checks.
868 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
870 * getaddrinfo queries are now cached. Canonical name lookup is performed
872 Implemented by Ulrich Drepper.
874 * The nothrow function attribute is used when headers are used by gcc when
875 compiling C code. This can avoid significant amounts of exception
878 * The malloc functions perform more error checking and are stricter when
879 it comes to reacting on errors. The default action is to terminate
880 the process after showing an error message. Implemented by Ulrich Drepper.
882 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
883 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
885 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
886 namespaces using the new function dlmopen(). This feature is of course,
887 like most other dynamic loading functionality, not available in statically
888 linked applications. Implemented by Ulrich Drepper.
890 * Low-overhead boundary checking variants of string and some stdio functions
891 were added. These are to be used in conjunction with a gcc patch by
892 Jakub Jelinek which adds calls to these functions if possible.
893 Implemented by Jakub Jelinek and Ulrich Drepper.
895 * Old code for several operating systems and machine architectures that
896 have not been in working condition in a long time have been removed from
897 the main source tree maintained by the GNU C Library's maintainers.
898 These files are now reside in the separate `ports' source module
899 that is usable as an add-on when building the library.
903 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
904 interrogate the dynamic linker, compatible with the Solaris interface.
906 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
907 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
909 * getifaddrs now uses the netlink interface on Linux to get its information.
910 Implemented by Thorsten Kukuk.
912 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
913 Implemented by Ulrich Drepper.
915 * support for non-executable stacks on x86 has been added. Changes mostly
918 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
921 * getaddrinfo now performs destination address selection according to
926 * Thread-safe interfaces for many functions that access locale data
927 were added in version 2.3, but these features were omitted from NEWS.
928 Many functions have variants with an `_l' suffix that take a `locale_t'
929 object as a parameter rather than consulting the current locale.
930 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
931 create and maintain `locale_t' objects. Additionally, the new function
932 `uselocale' sets "the current locale" (as used by functions not so
933 parameterized) set for an individual thread. These features were added
934 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
936 * The functions getresuid, getresgid, setresuid, and setresgid, which
937 have long been available on Linux, are now declared in <unistd.h>
938 and are now also available on the Hurd.
940 * ELF thread-local storage support (TLS) now works on x86-64.
942 * The new dynamic string token $LIB is expanded in shared library names.
943 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
945 * Aldy Hernandez contributed complete software floating point support for
946 PowerPC machines with no FPU.
948 * fexecve is implemented on Linux.
950 * The `btowc' function should work at least twice as fast due to
951 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
953 * With approriate thread add-ons cancelable functions are now implemented
954 in libc.so as well. No need to call the function in libpthread. This
955 change allowed to finally disable the incorrect and expensive handling
956 of weak definition in ld.so.
958 * Yet more PLT entries in libc.so have been removed. We finally arrived
959 at the bare minimum. Startup times improved appropriately.
961 * Support for the new Linux/x86 system call interface was added. The
962 AT_SYSINFO auxiliary vector entry is recognized and handled.
966 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
969 * iconv (the program and the interface) now accepts empty names (excluding
970 options like //TRANSLIT) to mean "use charset of current locale".
972 * localedef can now transliterate characters in strings which are not in
973 the provided charmap. The information from the input locale is used.
975 * Prelinking support was added for ELF targets. This requires additional
976 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
978 * Read-only stdio streams now use mmap to speed up operation by eliminating
979 copying and buffer underflows. To use add 'm' to the mode string of
980 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
982 * The malloc functions were completely rewritten by Wolfram Gloger based
983 on Doug Lea's malloc-2.7.0.c.
985 * Isamu Hasegawa contributed a completely new and POSIX-conformant
986 implementation of regex.
988 * Bruno Haible upgraded the iconv and locale implementation to support
991 * Contents of the LC_* and LANG environment variables in the CEN style are
992 not recognized anymore. It never was used. Change by Ulrich Drepper.
994 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
995 thread-local storage (TLS) ABI on some platforms.
996 Changes by Ulrich Drepper. SH support by Kaz Kojima.
998 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
999 EUC-JISX0213, and TSCII.
1001 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1002 BSD-compatible interface for getting all network interface addresses.
1003 Implementation for IPv4 by Roland McGrath.
1005 * Loading of locale data is faster due to the introduction of a locale
1006 archive. Implemented by Roland McGrath and Ulrich Drepper.
1008 * Startup times are significantly reduced by not using exported functions
1009 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1012 * Steven Munroe contributed a port to PowerPC64/Linux.
1016 * The Hurd now uses the GNU libio implementation of stdio rather than the
1017 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1019 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1020 with the same behavior as the Linux system call of the same name.
1024 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1025 128-bit long double format.
1027 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1028 IBM1161, and IBM1162 charsets.
1030 * Andreas Jaeger contributed a port to x86-64/Linux.
1032 * Peter Bruin contributed a port to PowerPC/Hurd.
1034 * libc functions using I/O streams now can handle wide-oriented streams
1037 * optimizations in the dynamic linker. Binaries created by recent binutils
1038 versions start up quicker due to reduced time spent on relocations.
1040 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1044 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1045 asinh, atanh, j0 for the 128-bit long double format.
1047 * Bruno Haible updated all the code handling Unicode in some form to
1048 support Unicode 3.1.
1050 * Speed of regex for single-byte locales is back to previous levels.
1051 Patch by Isamu Hasegawa.
1053 * Alpha, SPARC, and IA-64 now also using floating stacks.
1055 * Startup time of internationalized applications greatly improved through
1056 iconv cache. Use iconvconfig to generate the cache file.
1057 Contributed by Ulrich Drepper.
1059 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1060 severe performance problems. Patch by David Mosberger.
1062 * The Hurd port got a lot more functionality like AIO, various stdio
1063 extensions, etc. Mainly done by Roland McGrath.
1065 * mtrace can now lookup symbols in shared libraries.
1069 * Intel's IA-64 math library is largely integrated. It provides fast and
1070 accurate implementatations for most basic and standard math functions
1071 in float, double, and long double format.
1073 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1074 and asin for the 96-bit long double format and asin, log, tan for the
1075 128-bit long double format.
1077 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1078 The basic double functions exist today. Contributed by Abraham Ziv
1079 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1080 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1082 * An asynchronous name lookup library was added. The interface is designed
1083 after POSIX AIO. The proposal was circulated beforehand to get comments.
1084 No negative ones came in. Implemented by Ulrich Drepper.
1086 * Port to S390/64bit contributed by Martin Schwidefsky
1087 <schwidefsky@de.ibm.com>.
1089 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1090 of functions for Linux/IA-64.
1092 * The RPC code is now thread safe. Threads can now use the same service
1093 of different services at the same time. Patch by Eric Norum
1094 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1096 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1097 family of functions for Linux/S390.
1099 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1100 of functions for Linux/x86.
1102 * Port to Linux/CRIS contributed by Axis Communications.
1106 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1107 we can now check for namespace violations and missing declarations. The
1108 result is that almost all headers are now Unix-compliant (as defined in
1109 the upcoming XPG6). The negative side is that some programs might need
1110 corrections, too, if they depend on the incorrect form of the headers in
1111 previous versions which defined too many symbols and included too many
1114 * regex now handles multibyte character sets correctly.
1115 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1117 * iconv (the program) does now conform to the upcoming XPG6 and handles
1118 charmaps. Instead of the charset names the path of charmaps can be
1119 provided and the conversion happens based on this data.
1120 Contributed by Ulrich Drepper.
1122 * The locale program now provides detailed information about the installed
1127 only lists the names of the supported locales
1131 provides details such as country, language, and codeset name.
1132 Contributed by Ulrich Drepper.
1136 * The gencat program now parses the input file according to the charset
1137 selected by the LC_CTYPE category. This is important for stateful
1138 character sets. To make generating catalogs easier there is a way
1139 to overwrite the charset selected by the locale: before the first
1140 message or $ quote line the catalog can contain a line like
1142 $ codeset=ISO-8859-2
1144 to select the charset (ISO-8859-2 in this case).
1146 Implemented by Shinya Hanataka and Ulrich Drepper.
1148 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1149 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1150 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1152 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1153 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1155 * The LANGUAGE environment variable is now ignored unless the locale is
1156 changed from the default "C" locale.
1158 * The usual bug fixes.
1162 * Greg McGary added runtime support for bounds checking using gcc's
1163 new -fbounded-pointers option. ix86 target is complete. PowerPC
1166 * Thorsten Kukuk added secure mode support to nscd.
1168 * The Berkeley db libraries have been removed.
1170 Related, the nss_db module is now in a separate package since it
1171 obviously requires a database library being available.
1173 * Wide character I/O streams implemented by Ulrich Drepper.
1175 * Functions from the extended socket API added by Ulrich Drepper.
1177 * Functions feenableexcept and fedisableexcept to control the
1178 behaviour of individual exceptions have been added by Andreas Jaeger.
1180 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1182 * The resolver code has been updated from bind 8.2.3-T5B which supports
1183 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1186 This change could in some situations effect backward compatibility. Since
1187 now `_res' is a thread-local instead of a global variable, modifying it
1188 in one thread does not have any effect in other threads.
1190 The resolver library was also extended to allow IPv6 as the transport
1191 protocol for the requests. This work was done by Stig Venaas.
1193 * Compatibility code for K&R C compilers has been removed from the
1194 header files. A ISO C compiler is needed to use the library
1195 (conforming to either C89 or C99 standard).
1197 * Complete rewrite of the localedef program to support multibyte character
1198 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1199 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1200 Implemented by Ulrich Drepper.
1202 Bruno Haible significantly improved the generation and use of the data
1203 structures for the wide character tables.
1205 * Plural handling in gettext implemented by Ulrich Drepper.
1207 * The utmp daemon has been removed.
1209 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1211 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1214 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1216 * POSIX barriers implemented by Kaz Kylheku.
1218 * POSIX spawn function family implemented by Ulrich Drepper.
1220 * POSIX spinlocks are now available.
1222 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1224 * the configure option --enable-kernel=X.Y.Z allows to strip out
1225 compatibility for kernel versions before X.Y.Z. This is currently only
1226 implemented for Linux.
1228 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1229 field sin6_scope_id. This means that all programs using IPv6 should be
1230 recompiled. Don't expect binary compatibility with previous glibc
1233 * various conversion modules for IBM character sets contributed by
1236 * IA-64 port by Jes Sorensen and HJ Lu.
1250 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1252 * New xdr functions are added; some rpc functions are now 64bit clean.
1254 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1256 * Fixed known incompatibilities with glibc 2.0.
1258 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1260 * Optimized a number of functions (especially the ELF dynamic loader).
1262 * Update timezone data files.
1264 * lots of charmaps corrections
1266 * some new locale definitions and charmaps
1271 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1272 conform to POSIX member type requirements. Symbol versions have been
1273 adjusted as needed within the library, and for direct use by applications,
1274 but there is potential for problems if third-party libraries use
1275 struct timeval as part of their interface. This does not present
1276 a problem for X and other "essential" system libraries.
1278 * An additional locale model to support C++ Standard Library locale
1279 model and probably more was implemented by Ulrich Drepper.
1281 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1284 * Miles Bader provided the `argp' function family to support hierachical
1285 command line argument parsing, layered on top of getopt.
1287 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1289 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1292 * scanf recognizes the %a and %A format for scanning floating point numbers.
1294 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1295 information and interfaces for the available integer types.
1297 * about 130 new math functions were added to implement the ISO C9x math
1300 * the new header <complex.h> contains definitions of the complex math
1301 functions from ISO C 9X.
1303 * the new header <tgmath.h> defines generic macros to use complex or
1304 real valued functions.
1306 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1308 * Andreas Jaeger provided a test suite for the math library.
1310 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1312 * Ulrich Drepper added character set conversion functions (iconv).
1314 * Optimized string functions have been added.
1316 * The localedata addon is now part of glibc.
1318 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1320 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1321 daemon for NSS (nscd).
1323 Missing a better place here are some numbers on improvements. Under
1324 Linux 2.1.125 un-tar-ing the kernel sources takes
1328 using local files 12.19s 6.88s 22.91s
1330 using NIS 13.92s 8.91s 26.34s
1332 using NIS & nscd 10.37s 7.34s 25.30s
1334 using NIS+ 27.57s 30.37s 640.46s
1336 using NIS+ & nscd 10.25s 7.83s 26.51s
1338 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1340 Keep in mind that non-namelookup related operations dominate above times.
1341 It was just a common complain that using NIS+ unpacking the kernel is
1344 [1] The old nscd implementation is not available anymore since it was
1345 distributed with glibc up to version 2.0.98 and thus is now replaced.
1347 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1349 * Mark Kettenis provided a Hesiod NSS module.
1351 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1352 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1354 * rcmd can now handle netgroups (Dick Streefland).
1356 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1359 * Support for the IPv6 protocol has been added to the socket API, as per the
1360 latest draft standards.
1362 * Support for Linux 2.2 has been added.
1364 * Interface changes relative to the latest 2.0.x release:
1365 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1366 addseverity NEW: Unix98
1367 alphasort64 NEW: LFS
1368 argp_err_exit_status NEW: argp, GNU ext
1369 argp_error NEW: argp, GNU ext
1370 argp_failure NEW: argp, GNU ext
1371 argp_help NEW: argp, GNU ext
1372 argp_parse NEW: argp, GNU ext
1373 argp_program_bug_address NEW: argp, GNU ext
1374 argp_program_version NEW: argp, GNU ext
1375 argp_program_version_hook NEW: argp, GNU ext
1376 argp_state_help NEW: argp, GNU ext
1377 argp_usage NEW: argp, GNU ext
1378 authdes_create NEW: Secure RPC
1379 authdes_getucred NEW: Secure RPC
1380 authdes_pk_create NEW: Secure RPC
1381 backtrace NEW: GNU ext.
1382 backtrace_symbols NEW: GNU ext.
1383 backtrace_symbols_fd NEW: GNU ext.
1385 cacosf NEW: ISO C 9x
1386 cacosh NEW: ISO C 9x
1387 cacoshf NEW: ISO C 9x
1388 cacoshl NEW: ISO C 9x
1389 cacosl NEW: ISO C 9x
1396 casinf NEW: ISO C 9x
1397 casinh NEW: ISO C 9x
1398 casinhf NEW: ISO C 9x
1399 casinhl NEW: ISO C 9x
1400 casinl NEW: ISO C 9x
1402 catanf NEW: ISO C 9x
1403 catanh NEW: ISO C 9x
1404 catanhf NEW: ISO C 9x
1405 catanhl NEW: ISO C 9x
1406 catanl NEW: ISO C 9x
1407 cbc_crypt NEW: Secure RPC
1411 ccoshf NEW: ISO C 9x
1412 ccoshl NEW: ISO C 9x
1418 cimagf NEW: ISO C 9x
1419 cimagl NEW: ISO C 9x
1420 clearerr_locked REMOVED
1421 clntunix_create NEW: sunrpc ext
1423 clog10 NEW: ISO C 9x
1424 clog10f NEW: ISO C 9x
1425 clog10l NEW: ISO C 9x
1435 cprojf NEW: ISO C 9x
1436 cprojl NEW: ISO C 9x
1438 crealf NEW: ISO C 9x
1439 creall NEW: ISO C 9x
1444 csinhf NEW: ISO C 9x
1445 csinhl NEW: ISO C 9x
1448 csqrtf NEW: ISO C 9x
1449 csqrtl NEW: ISO C 9x
1453 ctanhf NEW: ISO C 9x
1454 ctanhl NEW: ISO C 9x
1456 des_setparity NEW: Secure RPC
1457 ecb_crypt NEW: Secure RPC
1458 endutxent NEW: Unix98
1460 exp10f NEW: ISO C 9x
1461 exp10l NEW: ISO C 9x
1465 fattach NEW: STREAMS
1466 fdetach NEW: STREAMS
1470 feclearexcept NEW: ISO C 9x
1471 fegetenv NEW: ISO C 9x
1472 fegetexceptflag NEW: ISO C 9x
1473 fegetround NEW: ISO C 9x
1474 feholdexcept NEW: ISO C 9x
1476 feraiseexcept NEW: ISO C 9x
1477 ferror_locked REMOVED
1478 fesetenv NEW: ISO C 9x
1479 fesetexceptflag NEW: ISO C 9x
1480 fesetround NEW: ISO C 9x
1481 fetestexcept NEW: ISO C 9x
1482 feupdateenv NEW: ISO C 9x
1483 fflush_locked REMOVED
1487 fgets_unlocked NEW: GNU ext.
1488 fileno_locked REMOVED
1500 fputc_locked REMOVED
1501 fputs_unlocked NEW: GNU ext.
1502 fread_unlocked NEW: GNU ext.
1507 fstatvfs NEW: Unix98
1511 ftruncate64 NEW: LFS
1513 fwrite_unlocked NEW: GNU ext.
1514 gai_strerror NEW: IPv6
1518 getchar_locked REMOVED
1520 getdate_err NEW: Unix98
1521 getdate_r NEW: GNU ext.
1523 getnameinfo NEW: IPv6
1524 getnetname NEW: Secure RPC
1525 getpmsg NEW: STREAMS
1526 getpt NEW: Unix98 PTY
1527 getrlimit64 NEW: LFS
1528 getutxent NEW: Unix98
1529 getutxid NEW: Unix98
1530 getutxline NEW: Unix98
1531 glob64 NEW: GNU ext.
1532 globfree64 NEW: GNU ext.
1533 gnu_get_libc_release NEW: GNU ext.
1534 gnu_get_libc_version NEW: GNU ext.
1535 grantpt NEW: Unix98 PTY
1536 host2netname NEW: Secure RPC
1538 iconv_close NEW: iconv
1539 iconv_open NEW: iconv
1540 if_freenameindex NEW: IPv6
1541 if_indextoname NEW: IPv6
1542 if_nameindex NEW: IPv6
1543 if_nametoindex NEW: IPv6
1544 in6addr_any NEW: IPv6
1545 in6addr_loopback NEW: IPv6
1546 inet6_isipv4mapped NEW: IPv6
1547 isastream NEW: STREAMS
1548 iswblank NEW: GNU ext.
1549 key_decryptsession NEW: Secure RPC
1550 key_decryptsession_pk NEW: Secure RPC
1551 key_encryptsession NEW: Secure RPC
1552 key_encryptsession_pk NEW: Secure RPC
1553 key_gendes NEW: Secure RPC
1554 key_get_conv NEW: Secure RPC
1555 key_secretkey_is_set NEW: Secure RPC
1556 key_setnet NEW: Secure RPC
1557 key_setsecret NEW: Secure RPC
1558 llrint NEW: ISO C 9x
1559 llrintf NEW: ISO C 9x
1560 llrintl NEW: ISO C 9x
1561 llround NEW: ISO C 9x
1562 llroundf NEW: ISO C 9x
1563 llroundl NEW: ISO C 9x
1568 lrintf NEW: ISO C 9x
1569 lrintl NEW: ISO C 9x
1570 lround NEW: ISO C 9x
1571 lroundf NEW: ISO C 9x
1572 lroundl NEW: ISO C 9x
1574 makecontext NEW: Unix98
1575 mempcpy NEW: GNU ext.
1578 modify_ldt NEW: kernel
1582 nearbyint NEW: ISO C 9x
1583 nearbyintf NEW: ISO C 9x
1584 nearbyintl NEW: ISO C 9x
1585 netname2host NEW: Secure RPC
1586 netname2user NEW: Secure RPC
1587 nexttoward NEW: ISO C 9x
1588 nexttowardf NEW: ISO C 9x
1589 nexttowardl NEW: ISO C 9x
1593 passwd2des NEW: Secure RPC
1595 pow10f NEW: GNU ext.
1596 pow10l NEW: GNU ext.
1599 printf_size NEW: GNU ext.
1600 printf_size_info NEW: GNU ext.
1601 profil_counter REMOVED
1602 pthread_mutexattr_getkind_np REPLACED
1603 pthread_mutexattr_setkind_np REPLACED
1604 ptsname NEW: Unix98 PTY
1605 ptsname_r NEW: Unix98 PTY
1607 putchar_locked REMOVED
1608 putgrent NEW: GNU ext.
1610 putpmsg NEW: STREAMS
1611 pututxline NEW: Unix98
1615 readdir64_r NEW: LFS
1616 remquo NEW: ISO C 9x
1617 remquof NEW: ISO C 9x
1618 remquol NEW: ISO C 9x
1620 roundf NEW: ISO C 9x
1621 roundl NEW: ISO C 9x
1623 scalbln NEW: ISO C 9x
1624 scalblnf NEW: ISO C 9x
1625 scalblnl NEW: ISO C 9x
1627 sendfile NEW: kernel
1628 setcontext NEW: Unix98
1629 setrlimit64 NEW: LFS
1630 setutxent NEW: Unix98
1632 sigignore NEW: Unix98
1633 sigqueue NEW: POSIX.1b
1634 sigrelse NEW: Unix98
1635 sigset NEW: POSIX.1b
1636 sigtimedwait NEW: POSIX.1b
1637 sigwaitinfo NEW: POSIX.1b
1638 sincos NEW: GNU ext.
1639 sincosf NEW: GNU ext.
1640 sincosl NEW: GNU ext.
1644 strcasestr NEW: GNU ext.
1645 strtoimax NEW: ISO C 9x
1646 strtoumax NEW: ISO C 9x
1647 strverscmp NEW: GNU ext.
1648 svcauthdes_stats NEW: Secure RPC
1649 svcunix_create NEW: sunrpc etx
1650 svcunixfd_create NEW: sunrpc ext
1651 swapcontext NEW: Unix98
1652 tcgetsid NEW: Unix98 PTY
1653 tdestroy NEW: GNU ext.
1654 tgamma NEW: ISO C 9x
1655 tgammaf NEW: ISO C 9x
1656 tgammal NEW: ISO C 9x
1660 truncf NEW: ISO C 9x
1661 truncl NEW: ISO C 9x
1663 unlockpt NEW: Unix98 PTY
1664 updwtmpx NEW: Unix98
1665 user2netname NEW: Secure RPC
1666 utmpxname NEW: Unix98
1667 versionsort NEW: GNU ext.
1668 versionsort64 NEW: GNU ext.
1670 wcscasecmp NEW: GNU ext.
1671 wcsncasecmp NEW: GNU ext.
1672 wcsnlen NEW: GNU ext.
1673 wcstoimax NEW: ISO C 9x
1674 wcstoll NEW: ISO C 9x
1675 wcstoull NEW: ISO C 9x
1676 wcstoumax NEW: ISO C 9x
1678 wordexp NEW: POSIX.2
1679 wordfree NEW: POSIX.2
1680 write_profiling REMOVED
1681 xdecrypt NEW: Secure RPC
1682 xdr_authdes_cred NEW: Secure RPC
1683 xdr_authdes_verf NEW: Secure RPC
1684 xdr_cryptkeyarg NEW: Secure RPC
1685 xdr_cryptkeyarg2 NEW: Secure RPC
1686 xdr_cryptkeyres NEW: Secure RPC
1687 xdr_getcredres NEW: Secure RPC
1688 xdr_key_netstarg NEW: Secure RPC
1689 xdr_key_netstres NEW: Secure RPC
1690 xdr_keybuf NEW: Secure RPC
1691 xdr_keystatus NEW: Secure RPC
1692 xdr_netnamestr NEW: Secure RPC
1693 xdr_sizeof NEW: Secure RPC
1694 xdr_unixcred NEW: sunrpc ext
1695 xencrypt NEW: Secure RPC
1696 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1707 * inet_ntoa is thread-safe
1709 * updwtmp is moved from libutil to libc
1711 * rewrite of cbrt function
1713 * update of timezone data
1727 * add atoll function
1729 * fix complex problems in Berkeley DB code
1731 * fix math functions
1735 * fixed lots of header problems (especially Linux/GNU specific)
1737 * dynamic loader preserves all registers
1739 * Roland McGrath provided support for handling of auxiliary objects in
1740 the ELF dynamic loader.
1742 * support for parallel builds is improved
1746 * GNU extensions are no longer declared by default. To enable them you
1747 must define the macro `_GNU_SOURCE' in your program or compile with
1750 * The library has changed from using GNU ld symbol aliases to using weak
1751 symbols where available. The ELF object file format supports weak
1752 symbols; GNU ld also supports weak symbols in the a.out format. (There
1753 is also now support for other GNU ld extensions in ELF. Use the
1754 `--with-elf' option to configure to indicate you have ELF, and
1755 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1756 of many files which contained only symbol aliases, reducing the size of
1757 the source and the compiled library; many other files were renamed to
1758 less cryptic names previously occupied by the symbol alias files.
1759 There is a new header file <elf.h> for programs which operate on
1760 files in the ELF format.
1762 * Converted to Autoconf version 2, so `configure' has more options.
1763 Run `configure --help' to see the details.
1765 * The library can now be configured to build profiling, highly-optimized
1766 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1767 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1768 `configure' enable building these extra libraries. The shared library is
1769 built by default when using both ELF and GNU ld. When shared libraries
1770 are enabled, the new library `-ldl' is available for arbitrary run-time
1771 loading of shared objects; its interface is defined in <dlfcn.h>. The
1772 new header file <link.h> gives access to the internals of the run-time
1773 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1774 application of same name on other systems and it provides information
1775 about dynamically linked binaries.
1777 * The C library now provides the run-time support code for profiling
1778 executables compiled with `-pg'. Programs can control the profiling code
1779 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1780 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1781 the support for this file format was contributed by David Mosberger-Tang.
1783 * The math code has been replaced with a math library based on fdlibm from
1784 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1785 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1786 functions. The math functions now reside in a separate library, so
1787 programs using them will need to use `-lm' their linking commands.
1789 * John C. Bowman contributed optimized ix87 assembler inline functions.
1791 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1792 mechanism similar to that found in Solaris 2. This is now used for the
1793 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1794 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1795 file controls what services are used for each individual database. This
1796 works by loading shared libraries with names specified in `nsswitch.conf',
1797 so service modules can be changed or added at any time without even
1798 relinking any program. Currently there are the file, db, and NIS based
1799 NSS services available.
1801 * The new functions `strtoq' and `strtouq' parse integer values from
1802 strings, like `strtol' and `strtoul', but they return `long long int' and
1803 `unsigned long long int' values, respectively (64-bit quantities).
1805 * The new functions `strtof' and `strtold' parse floating-point values from
1806 strings, like `strtod', but they return `float' and `long double' values,
1807 respectively (on some machines `double' and `long double' are the same).
1809 * Ulrich Drepper has contributed new implementations of the floating-point
1810 printing and reading code used in the `printf' family of functions and
1811 `strtod', `strtof', and `strtold'. These new functions are perfectly
1812 accurate, and much faster than the old ones.
1814 * The implementation of the POSIX locale model was completely rewritten by
1815 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1816 to compile the POSIX locale definition.
1818 * The former dummy implementations of the strcoll and strxfrm function are
1819 now replaced by fully functional code contributed by Ulrich Drepper. The
1820 collation information comes from the POSIX locale definitions.
1822 * The new header <langinfo.h> defines an interface for accessing
1823 various locale-dependent data (using the locale chosen with `setlocale').
1825 * Ulrich Drepper has contributed a new suite of functions for operation on
1826 wide-character and multibyte-character strings, in <wchar.h>;
1827 and classification and case conversion of wide characters, in <wctype.h>.
1828 These new functions are conforming to the ISO C, Amendement 1 specification.
1830 * There is now a second implementation of the standard I/O library available.
1831 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1832 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1834 * You can now use positional parameter specifications in format strings
1835 for the `printf' and `scanf' families of functions. For example,
1836 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1837 ``Number 6, Mr Jones''. This is mainly useful when providing different
1838 format strings for different languages, whose grammars may dictate
1839 different orderings of the values being printed. To support this
1840 feature, the interface for `register_printf_handler' has changed; see
1841 the header file <printf.h> for details.
1843 * The `printf' and `scanf' families of functions now understand a new
1844 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1845 to group numbers as indicated by the locale; for `scanf' and friends, this
1846 says to accept as valid only a number with all the proper grouping
1847 separators in the right places. In the default "C" locale, numbers are
1848 not grouped; but locales for specific countries will define the usual
1849 conventions (i.e. separate thousands with `,' in the US locale).
1851 * The pgrp functions have been regularized, slightly incompatibly but much
1852 less confusingly. The core functions are now `getpgid' and `setpgid',
1853 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1854 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1855 provided for compatibility. There is no longer an incompatible `getpgrp'
1856 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1858 * The new header file <fts.h> and suite of functions simplify programs that
1859 operate on directory trees. This code comes from 4.4 BSD.
1861 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1862 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1863 NSS scheme used in glibc.
1865 * There is a new malloc debugging hook `__memalign_hook'.
1867 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1868 `unsigned int' in <sys/types.h>. These are for compatibility only and
1869 their use is discouraged.
1871 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1872 done differently, so that it works even without GNU ld.
1874 * New function `euidaccess' checks allowed access to a file like `access',
1875 but using the effective IDs instead of the real IDs.
1877 * The time zone data files have been updated for the latest and greatest
1878 local time conventions of the countries of the world.
1880 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1883 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1884 for formatting floating-point numbers. They are provided only for
1885 compatibility; new programs should use `sprintf' instead. There are
1886 also equivalent function for the `long double' floating-point type and
1887 all functions also exist in a reentrant form.
1889 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1890 functions for maintaining the login-record files (primarily of use to
1891 system programs such as `login'), and convenient functions for
1892 allocating and initializing a pseudo-terminal (pty) device.
1894 * Ulrich Drepper has contributed new support for System V style
1895 shared memory and IPC on systems that support it.
1897 * Ulrich Drepper has contributed several miscellaneous new functions found
1898 in System V: The `hsearch' family of functions provide an effective
1899 implementation of hash tables; `a64l' and `l64a' provide a very simple
1900 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1903 * Ulrich Drepper has contributed new reentrant counterparts for the
1904 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1906 * Ulrich Drepper has contributed new, highly-optimized versions of several
1907 string functions for the i486/Pentium family of processors.
1909 * Ulrich Drepper has updated the Linux-specific code, based largely
1910 on work done in Hongjiu Lu's version of GNU libc for Linux.
1911 The GNU library now supports Linux versions 2.0.10 and later,
1912 using the ELF object file format (i[3456]86-*-linux).
1914 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1916 * David Mosberger-Tang and Richard Henderson have ported the C library
1917 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1918 dynamic linking support for ELF/Alpha.
1920 * Richard Henderson contributed several Alpha optimized assembler function
1921 for arithmetic and string handling.
1923 * Ulrich Drepper has contributed a new set of message catalog functions to
1924 support multiple languages using the <libintl.h> interface, for use with
1925 his new package GNU gettext. Translation volunteers have contributed
1926 catalogs of the library's messages in Spanish, German, and Korean.
1928 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1929 program and the `catgets' function for reading the catalog files it
1930 creates. (The <libintl.h> interface is preferred; we include the
1931 <nl_types.h> interface using `catgets' only for source compatibility with
1932 programs already written to use it.)
1934 * New header file <values.h> gives SVID-compatible names for <limits.h>
1937 * Various new macros, declarations, and small header files for compatibility
1940 * New function `group_member' is a convenient way to check if a process has
1941 a given effective group ID.
1943 * When using GCC 2.7 and later, the socket functions are now declared in a
1944 special way so that passing an argument of type `struct sockaddr_in *',
1945 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1946 `struct sockaddr *' type, does not generate a type-clash warning.
1948 * New function `error' declared in header file <error.h> is a convenient
1949 function for printing error messages and optionally exiting; this is the
1950 canonical function used in GNU programs. The new functions `err', `warn',
1951 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1952 doing the same thing.
1954 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1955 POSIX.2 `glob' function to do ~ and {...} expansion.
1957 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1958 `clearenv' which is used in POSIX.9 is also available.
1960 * New function `getsid' returns session ID number on systems that support it.
1962 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1963 files <db.h> and <mpool.h> provide a rich set of functions for several
1964 types of simple databases stored in memory and in files, and <ndbm.h> is
1965 an old `ndbm'-compatible interface using the `db' functions. Link with
1966 `-ldb' to get these functions.
1968 * New macro `strdupa' copies a string like `strdup', but uses local stack
1969 space from `alloca' instead of dynamic heap space from `malloc'.
1971 * New function `strnlen' is like `strlen' but searches only a given maximum
1972 number of characters for the null terminator. `stpncpy', `strndup' and
1973 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1976 * New function `statfs' in header <sys/statfs.h>.
1978 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1979 provide convenient functions for operating on blocks of null-terminated
1982 * A new suite of functions in <utmp.h> handle all the details of reading
1983 and writing the utmp file.
1985 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1988 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1989 completely POSIX compliant and also implemented the extended functionality
1990 to handle alternate digit representation and alternate era date formats.
1992 * Ulrich Drepper provided an implementation of the `strptime' function
1993 defined in XPG4.2 which transforms a string into a `struct tm' value.
1995 * Paul Eggert provided the tzselect shell script as part of the timezone
1996 code. The shell script makes it easy to select the correct timezone
1999 * The implementation of the malloc family of functions is completely replaced
2000 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2001 The implementation uses the mmap function (if available) and it is
2002 optimized for the use in multi threaded programs.
2004 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2005 functions. This new functionality is usable by specifying a special
2006 salt string and it is compatible with implementation on *BSD systems.
2008 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2009 `getsubopt' to handle second level command line options, `bsd_signal'
2010 to access BSD style `signal' functionality, the obsolete `regexp' style
2013 * the `lchown' function is available on system which support this
2016 * The implementation of the shadow password handling function was contributed
2019 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2021 * POSIX.1g support was added. The <sys/select.h> header is available,
2022 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2023 implementation of `getaddrinfo'.
2027 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2029 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2030 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2032 * The new function `daemon' from 4.4 BSD is useful for server programs that
2033 want to put themselves in the background.
2035 * Joel Sherrill has contributed support for several standalone boards that
2036 run without an operating system.
2038 * `printf', `scanf' and friends now accept a `q' type modifier for long
2039 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2041 * All of the code taken from BSD (notably most of the math and networking
2042 routines) has been updated from the BSD 4.4-Lite release.
2044 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2046 * The new functions `getdomainname' and `setdomainname' fetch or change the
2047 YP/NIS domain name. These are system calls which exist on systems which
2050 * The time zone data files have been updated for the latest international
2053 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2054 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2058 * The C library now includes support for Sun RPC, from Sun's free
2059 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2060 are included. (There is still no support for YP.)
2062 * Tom Quinn has contributed a port of the C library to SGI machines running
2063 Irix 4 (mips-sgi-irix4).
2065 * The new `lockf' function is a simplified interface to the locking
2066 facilities of `fcntl', included for compatibility.
2068 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2070 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2072 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2075 * The error message printed by `assert' for a failed assertion now includes
2076 the name of the program (if using GNU ld) and the name of the calling
2077 function (with versions of GCC that support this).
2079 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2081 * The library now includes the <sys/mman.h> header file and memory
2082 management functions `mmap', `munmap', `mprotect', `msync', and
2083 `madvise', on systems that support those facilities.
2085 * The interface for `mcheck' has changed slightly: the function called to
2086 abort the program when an allocation inconsistency is detected now takes
2087 an argument that indicates the type of failure. The new function
2088 `mprobe' lets you request a consistency check for a particular block at
2089 any time (checks are normally done only when you call `free' or `realloc'
2092 * It is now possible to easily cross-compile the C library, building on one
2093 system a library to run on another machine and/or operating system. All
2094 you need to do is set the variable `HOST_CC' in `configparms' to the
2095 native compiler for programs to run on the machine you are building on (a
2096 few generator programs are used on Unix systems); set `CC' to the
2099 * The new function `fexecve' (only implemented on the GNU system) executes
2100 a program file given a file descriptor already open on the file.
2104 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2105 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2107 * You can set the variable `libprefix' in `configparms' to specify a prefix
2108 to be prepended to installed library files; this makes it easy to install
2109 the GNU C library to be linked as `-lgnuc' or whatever.
2111 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2112 copies a limited number of characters from a string, and returns the
2113 address of the last character written.
2115 * You no longer need to check for whether the installed `stddef.h' is
2116 compatible with the GNU C library. configure now checks for you.
2118 * You can now define a per-stream `fileno' function to convert the
2119 stream's cookie into an integral file descriptor.
2121 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2122 allocates zero bytes of storage, and returns a unique pointer which
2123 you can pass to `realloc' or `free'. The behavior is undefined if
2124 you dereference this pointer.
2126 * The C library now runs on Sony NEWS m68k machines running either
2127 NewsOS 3 or NewsOS 4.
2129 * The new `syscall' function is a system-dependent primitive function
2130 for invoking system calls. It has the canonical behavior on Unix
2131 systems, including unreliable return values for some calls (such as
2132 `pipe', `fork' and `getppid').
2134 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2135 to `EAGAIN', which is the preferred name. On systems whose kernels
2136 use two distinct codes, the C library now translates EWOULDBLOCK to
2137 EAGAIN in every system call function.
2141 * The GNU C Library Reference Manual is now distributed with the library.
2142 `make dvi' will produce a DVI file of the printed manual.
2143 `make info' will produce Info files that you can read on line using C-h i
2144 in Emacs or the `info' program.
2145 Please send comments on the manual to bug-glibc-manual@gnu.org.
2147 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2149 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2151 * Jason Merrill has contributed a port to the Sequent Symmetry running
2152 Dynix version 3 (i386-sequent-dynix).
2154 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2155 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2157 * New function `memory_warnings' lets you arrange to get warnings when
2158 malloc is running out of memory to allocate, like Emacs gives you.
2160 * The C library now contains the relocating allocator used in Emacs 19 for
2161 its editing buffers. This allocator (ralloc) minimizes allocation
2162 overhead and fragmentation by moving allocated regions around whenever it
2163 needs to. You always refer to a ralloc'd region with a "handle" (a
2164 pointer to a pointer--an object of type `void **').
2166 * There is a new `printf' format: `%m' gives you the string corresponding
2167 to the error code in `errno'.
2169 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2170 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2171 pass, the `a' modifier says to fill in a `char **' you pass with a
2174 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2175 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2176 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2178 * `mkstemp' is a traditional Unix function to atomically create and open a
2179 uniquely-named temporary file.
2183 * The standard location for the file that says what the local timezone is
2184 has changed again. It is now `/usr/local/etc/localtime' (or more
2185 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2187 * The distribution no longer contains any files with names longer than 14
2190 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2191 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2193 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2197 * The configuration process has changed quite a bit. The `configure'
2198 script is now used just like the configuration scripts for other GNU
2199 packages. The `sysdeps' directory hierarchy is much rearranged.
2200 The file `INSTALL' explains the new scheme in detail.
2202 * The header files no longer need to be processed into ANSI C and
2203 traditional C versions. There is just one set of files to install, and
2204 it will work with ANSI or old C compilers (including `gcc -traditional').
2206 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2207 MIPS DECStation running Ultrix 4.
2209 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2210 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2211 made itself into a shared library.
2213 * Yet further improved support for the i386, running 4.3 BSD-like systems
2214 (such as Mach 3 with the Unix single-server), or System V.
2216 * New function `strncasecmp' to do case-insensitive string comparison
2217 with limited length.
2219 * New function `strsep' is a reentrant alternative to `strtok'.
2221 * New functions `scandir' and `alphasort' for searching directories.
2223 * New function `setenv' is a better interface to `putenv'.
2225 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2226 function for traversing a directory tree.
2228 * The GNU obstack package is now also part of the C library.
2229 The new function `open_obstack_stream' creates a stdio stream that
2230 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2231 formatted output directly to an obstack.
2233 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2234 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2236 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2238 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2239 things to your strings.
2241 * There are some new test programs: test-fseek, testmb, and testrand.
2243 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2244 These ports are not finished, but are a good starting place for really
2245 supporting those systems.
2247 * `/etc/localtime' is now the standard location for the file that says what
2248 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2249 This follows the general principle that `/etc' is the place for all local
2250 configuration files.
2252 * The C library header files now use `extern "C"' when used by the C++
2253 compiler, so the C library should now work with C++ code.
2255 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2256 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2259 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2260 function which uses the `merge sort' algorithm, and is said to be
2261 significantly faster than the old GNU `qsort' function. Merge sort is
2262 now the standard `qsort' function. The new algorithm can require a lot
2263 of temporary storage; so, the old sorting function is called when the
2264 required storage is not available.
2266 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2267 provides the Unix `crypt' function, plus some other entry points.
2269 * The code and header files taken from 4.4 BSD have been updated with the
2270 latest files released from Berkeley.
2272 ----------------------------------------------------------------------
2273 Copyright information:
2275 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2277 Permission is granted to anyone to make or distribute verbatim copies
2278 of this document as received, in any medium, provided that the
2279 copyright notice and this permission notice are preserved,
2280 thus giving the recipient permission to redistribute in turn.
2282 Permission is granted to distribute modified versions
2283 of this document, or of portions of it,
2284 under the above conditions, provided also that they
2285 carry prominent notices stating who last changed them.
2288 version-control: never
projects / platform / upstream / glibc.git / blob