1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2012 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 1349, 3479, 5044, 5298, 5400, 6530, 6778, 6808, 9685, 9914, 10014,
13 10038, 10631, 11438, 11607, 13412, 13542, 13629, 13679, 13696, 13717,
14 13741, 13939, 13966, 14042, 14090, 14150, 14151, 14154, 14157, 14166,
15 14173, 14195, 14237, 14251, 14252, 14283, 14298, 14303, 14307, 14328,
16 14331, 14336, 14337, 14347, 14349, 14376, 14417, 14459, 14476, 14477,
17 14505, 14510, 14516, 14518, 14519, 14530, 14532, 14538, 14543, 14544,
18 14545, 14557, 14562, 14576, 14579, 14583, 14587, 14621, 14638, 14645,
21 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
22 Optimized versions of memcpy, memset, and memcmp added for System z10 and
24 Implemented by Andreas Krebbel.
26 * The new function secure_getenv allows secure access to the environment,
27 returning NULL if running in a SUID/SGID process. This function replaces
28 the internal function __secure_getenv.
30 * SystemTap static probes have been added into the dynamic linker.
31 Implemented by Gary Benson.
33 * Optimizations of string functions strstr, strcasestr and memmem.
34 Implemented by Maxim Kuvyrkov.
36 * The minimum Linux kernel version that this version of the GNU C Library
37 can be used with is 2.6.16.
39 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
40 powerpc POWER7. Implemented by Will Schmidt.
42 * New configure option --disable-nscd builds the C library such that it
43 never attempts to contact the Name Service Caching Daemon (nscd).
44 New configure option --disable-build-nscd avoids building nscd itself;
45 this is the default if --disable-nscd is used.
47 * The ttyname and ttyname_r functions on Linux now fall back to searching for
48 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
49 allows creation of chroots without the procfs mounted on /proc.
54 * The following bugs are resolved with this release:
56 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
57 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
58 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
59 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
60 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
61 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
62 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
63 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
64 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
65 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
66 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
67 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
68 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
69 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
70 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
71 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
72 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
73 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
74 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
75 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
76 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
77 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
80 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
81 configuring glibc with:
82 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
83 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
84 Implemented by H.J. Lu.
88 + define static_assert
92 + declare at_quick_exit and quick_exit also for ISO C11
94 + aligned_alloc. NB: The code is deliberately allows the size parameter
95 to not be a multiple of the alignment. This is a moronic requirement
96 in the standard but it is only a requirement on the caller, not the
101 + uchar.h support added
103 + CMPLX, CMPLXF, CMPLXL added
105 Implemented by Ulrich Drepper.
107 * Support for the IA-64 has been moved to ports.
109 * Remove support for anything but ELF binary format
111 * Checking versions of poll, ppoll added.
112 Implemented by Ulrich Drepper.
114 * More generic and 64-bit performance optimizations to math functions.
115 Implemented by Ulrich Drepper.
117 * New configure option --enable-obsolete-rpc makes the deprecated RPC
118 headers and functions available at compile time as they were before
119 version 2.14. This option will be removed at some time in the future
120 after the TI-RPC library becomes fully sufficient for the needs of
121 existing applications.
123 * Compatibility code for Linux kernel versions before 2.4 has been removed.
124 Note that glibc is not expected to work with any Linux kernel version
127 * New header <sys/auxv.h> and function getauxval allowing easy access to
128 the AT_* key-value pairs passed from the Linux kernel. The header also
129 defines the HWCAP_* bits associated with the AT_HWCAP key.
131 * New locales: mag_IN
133 * New configure option --enable-systemtap builds SystemTap static probes
134 into libc for setjmp and longjmp and into libpthread for various operations.
135 So far the setjmp/longjmp probes and some of the libpthread probes are
136 provided only for i*86 and x86_64.
137 Implemented by Roland McGrath and Rayson Ho.
139 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
141 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
144 * More optimized functions for SPARC. Implemented by David S. Miller.
146 * Improved support for cross-compilation, especially bootstrap builds
147 without a previously built glibc.
149 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
150 Chris Metcalf from Tilera.
152 * Support for the old ARM ABI has been removed from ports. Only the EABI is
153 now supported for ARM processors.
155 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
156 as the name of the dynamic linker, to distinguish it from the
157 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
159 * Support for CRIS has been removed from ports.
161 * A new class of installed header has been documented for low-level
162 platform-specific functionality. PowerPC added the first instance with a
163 function to provide time base register access. Contributed by Tulio
164 Magno Quites Machado Filho.
166 * ix86 configurations now install header files that are consistent with
167 what x86-64 configurations install. These same header files can be used
168 for -m32, -m64, or -mx32 builds.
169 Contributed by H.J. Lu.
171 * Math library bug fixes. A thorough audit of all open math library bugs was
172 conducted by Joseph Myers. Significant progress was made on many math
173 library bugs resulting in more accurate exceptions and function results.
174 Many thanks to all those that contributed including Andreas Jaeger for his
175 patch review and work on the x87 trigonometric instruction issues.
177 * Timezone data is no longer installed. Timezone-related binaries and scripts
178 will continue to be installed. Users should obtain their timezone data from
179 their distribution provider or from the tzdata package at
180 <ftp://munnari.oz.au/pub/>.
184 * The following bugs are resolved with this release:
186 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
187 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
188 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
189 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
190 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
191 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
192 13484, 13506, 13515, 13523, 13524, 13538, 13540
194 * New program pldd to list loaded object of a process
195 Implemented by Ulrich Drepper.
197 * Add nss_db support back to glibc. No more dependency on Berkeley db
198 and support for initgroups lookups.
199 Implemented by Ulrich Drepper.
201 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
202 Contributed by HJ Lu.
204 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
205 Contributed by HJ Lu.
207 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
208 on x86-32 and x86-64.
209 Contributed by Liubov Dmitrieva.
211 * Optimized strchr and strrchr for SSE on x86-32.
212 Contributed by Liubov Dmitrieva.
214 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
215 for x86-64 and x86-32.
216 Contributed by Liubov Dmitrieva.
218 * New interfaces: scandirat, scandirat64
219 Implemented by Ulrich Drepper.
221 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
222 Implemented by Ulrich Drepper.
224 * nscd now also caches the netgroup database.
225 Implemented by Ulrich Drepper.
227 * Integrate libm with gcc's -ffinite-math-only option.
228 Implemented by Ulrich Drepper.
230 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
231 to math functions. Implemented by Ulrich Drepper.
233 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
234 Implemented by Ulrich Drepper.
236 * New Linux interfaces: process_vm_readv, process_vm_writev
238 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
239 Implemented by Ulrich Drepper.
241 * Optimized nearbyint and strcasecmp for PPC.
242 Implemented by Adhemerval Zanella.
244 * New locales: bho_IN, unm_US, es_CU, ta_LK
248 * The following bugs are resolved with this release:
250 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
251 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
252 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
253 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
254 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
255 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
256 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
257 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
258 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
259 12795, 12811, 12813, 12814, 12841
261 * The RPC implementation in libc is obsoleted. Old programs keep working
262 but new programs cannot be linked with the routines in libc anymore.
263 Programs in need of RPC functionality must be linked against TI-RPC.
264 The TI-RPC implementation is IPv6 enabled and there are other benefits.
266 Visible changes of this change include (obviously) the inability to link
267 programs using RPC functions without referencing the TI-RPC library and the
268 removal of the RPC headers from the glibc headers.
269 Implemented by Ulrich Drepper.
271 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
272 syncfs, setns, sendmmsg
274 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
275 yue_HK, lij_IT, mhr_RU
277 * New encodings: CP770, CP771, CP772, CP773, CP774
279 * New program sotruss to trace calls through PLTs
280 Implemented by Ulrich Drepper.
282 * The malloc hook implementation is marked deprecated and will be removed
283 from the default implementation in the next version. The design never
284 worked ever since the introduction of threads. Even programs which do
285 not create threads themselves can use multiple threads created internally.
289 * The following bugs are resolved with this release:
291 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
292 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
293 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
294 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
297 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
299 * POWER7 optimizations: memset, memcmp, strncmp
301 * New optimized string functions for x86-64: strnlen (SSE2),
302 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
303 Implemented by Ulrich Drepper.
307 * The following bugs are resolved with this release:
309 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
310 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
311 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
312 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
313 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
314 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
315 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
316 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
318 * New interfaces: pthread_getname_np, pthread_setname_np
320 * New Linux interface: recvmmsg
322 * STT_GNU_IFUNC implemented for Sparc by David Miller.
324 * The dynamic linker now recognizes supported ABI versions from the
325 EI_ABIVERSION field in the ELF header.
326 Implemented by Ulrich Drepper.
328 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
329 will not be used to fill in password fields in the passwd.byname replies.
330 Instead it is used to synthesize the shadow.byname table, should it be
331 missing. This is a useful mode in some installations involving Solaris.
332 Implemented by Ulrich Drepper.
334 * New locales: kok_IN, sq_MK, cv_RU
338 * The following bugs are resolved with this release:
340 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
341 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
342 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
343 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
344 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
345 10789, 10817, 10823, 10840, 10847
347 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
349 Implemented by Ulrich Drepper.
351 * Checking version of longjmp added that fails if an uninitialized stack
352 frame would be created. Implemented by Ulrich Drepper.
354 * STT_GNU_IFUNC is now supported in static executables.
355 Implemented by H.J. Lu.
357 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
359 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
360 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
361 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
362 Contributed by H.J. Lu.
364 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
365 Implemented by Ulrich Drepper.
367 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
369 Contributed by H.J. Lu.
371 * Support for fma instruction in AVX on x86-64.
372 Implemented by H.J. Lu and Ulrich Drepper.
374 * AVX support in x86-64 auditing support in ld.so.
375 Implemented by H.J. Lu.
377 * STB_GNU_UNIQUE support added.
378 Implemented by Ulrich Drepper.
380 * Implement second fallback mode for optimized DNS lookup for even more
381 broken environments. If two requests from the same port are not
382 handled correctly close the socket and open a new one before sending
383 the second request. The 'single-request-reopen' option in /etc/resolv.conf
384 can be used to select this mode right away, instead of rediscovering the
385 necessity is every process again.
386 Implemented by Ulrich Drepper.
388 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
389 Implemented by Adam Tkac.
391 * Optimized iconv conversions for S390x.
392 Implemented by Andreas Krebbel.
394 * Using condvars with PI mutexes is now more efficient due to kernel
395 support for requeueing to PI futexes. NPTL support added for x86-64.
396 Implemented by Ulrich Drepper.
398 * New locales: ps_AF, my_MM
402 * The following bugs are resolved with this release:
404 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
405 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
406 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
407 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
408 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
410 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
411 Implemented by Ulrich Drepper.
413 * New Linux interfaces: accept4, fallocate, fallocate64.
414 Implemented by Ulrich Drepper.
416 * Correct declarations of string function when used in C++ code. This
417 could lead to compile errors for invalid C++ code.
419 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
422 * New POSIX 2008 interface: psiginfo
423 Implemented by Ulrich Drepper.
425 * New ISO C++1x interfaces: quick_exit, at_quick_exit
426 Implemented by Ulrich Drepper.
428 * Support for selecting between multiple function definitions at runtime
429 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
431 * The libcrypt library can now use the hash function implementations in
432 NSS. Implemented by Ulrich Drepper.
434 * The malloc implementation can be compiled to be less memory efficient
435 but higher performing in multi-threaded programs.
436 Implemented by Ulrich Drepper.
438 * New locales: nan_TW@latin, ks_IN
440 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
441 Implemented by Ulrich Drepper.
443 * Extended printf hook support. It is possible to use user-defined types
444 and extend existing format specifiers.
445 Implemented by Ulrich Drepper.
447 * Handling for group shadow files has been added.
448 Implemented by Ulrich Drepper.
450 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
451 servers (the case, e.g., for some people using the built-in DNS
452 server in ADSL modems/routers). There is a once-per-process timeout
453 in case of a broken server. To avoid it, users can run nscd or put
454 'options single-request' in /etc/resolv.conf.
455 Implemented by Ulrich Drepper.
459 * The following bugs are resolved with this release:
461 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
462 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
463 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
464 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
465 6968, 6974, 6980, 6995, 7008, 7009, 7029
467 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
468 up at the same time. Implemented by Ulrich Drepper.
470 * TLS descriptors for LD and GD on x86 and x86-64.
471 Implemented by Alexandre Oliva.
473 * getaddrinfo now handles DCCP and UDPlite.
474 Implemented by Ulrich Drepper.
476 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
477 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
478 Implemented by Ulrich Drepper.
480 * New implementation of memmem, strstr, and strcasestr which is O(n).
481 Implemented by Eric Blake.
483 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
485 * Implement "e" option for popen to open file descriptor with the
486 close-on-exec flag set. Implemented by Ulrich Drepper.
488 * Implement "b" mode for fmemopen. In this mode writes writes don't
489 implicitly add a NUL byte and seeks from the end of the buffer really
490 use the buffer end, not the string length as the basis.
491 Implemented by Ulrich Drepper.
493 * Many functions, exported and internal, now atomically set the close-on-exec
494 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
496 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
498 Implemented by Pravin Satpute.
500 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
504 * The following bugs are resolved with this release:
506 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
507 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
508 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
509 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
510 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
511 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
512 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
514 * New locales: bo_CN, bo_IN, shs_CA.
516 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
518 * Sorting rules for some Indian languages (Devanagari and Gujarati).
519 Implemented by Pravin Satpute.
521 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
523 * nscd caches now all timeouts for DNS entries
524 Implemented by Ulrich Drepper.
526 * nscd is more efficient and wakes up less often.
527 Implemented by Ulrich Drepper.
529 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
530 vdprintf, and obstack_vprintf.
531 Implemented by Jakub Jelinek.
533 * Faster memset for x86-64.
534 Implemented by Harsha Jagasia and H.J. Lu.
536 * Faster memcpy on x86.
537 Implemented by Ulrich Drepper.
539 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
540 Implemented by Ulrich Drepper.
542 * Faster sqrt and sqrtf implemention for some PPC variants.
543 Implemented by Steven Munroe.
547 * The following bugs are resolved with this release:
549 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
550 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
551 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
552 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
553 5071, 5103, 5104, 5112, 5113, 5184, 5186
555 * More checking functions: fread, fread_unlocked, open*, mq_open.
556 Implemented by Jakub Jelinek and Ulrich Drepper.
558 * Extend fortification to C++. Implemented by Jakub Jelinek.
560 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
561 by not recognizing 'a' as a modifier when those specs are requested.
562 Implemented by Jakub Jelinek.
564 * PPC optimizations to math and string functions.
565 Implemented by Steven Munroe.
567 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
568 options to be passed. Implemented by Ulrich Drepper.
570 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
572 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
573 Implemented by Ulrich Drepper.
575 * Handle private futexes in the NPTL implementation.
576 Implemented by Jakub Jelinek and Ulrich Drepper.
578 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
579 Implemented by Roland McGrath and Ulrich Drepper.
581 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
583 * SHA-256 and SHA-512 based password encryption.
584 Implemented by Ulrich Drepper.
586 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
587 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
590 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
591 Implemented by Ulrich Drepper.
595 * The following bugs are resolved with this release:
597 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
598 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
599 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
600 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
601 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
602 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
603 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
606 * New Linux interfaces: epoll_pwait, sched_getcpu.
608 * New generic interfaces: strerror_l.
610 * nscd can now cache the services database. Implemented by Ulrich Drepper.
614 * The following bugs are resolved with this release:
616 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
617 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
618 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
619 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
620 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
621 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
622 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
623 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
624 3225, 3251, 3252, 3253, 3273
626 * For Linux, the sorting of addresses returned by getaddrinfo now also
627 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
628 Implemented by Ulrich Drepper.
630 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
631 Implemented by Ulrich Drepper.
633 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
635 * New iconv module for MIK. Contributed by Alexander Shopov.
637 * For sites with broken group and/or passwd database, the auto-propagate
638 option of nscd can prevent creating ID lookup entries from the results
639 of a name lookup and vice versa. This usually is no problem but some
640 site might have problems with the default behavior.
641 Implemented by Ulrich Drepper.
643 * Iterating over entire database in NIS can be slow. With the
644 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
645 to trade time for memory. The entire database will be read at once.
646 Implemented by Ulrich Drepper.
648 * The interfaces introduced in RFC 3542 have been implemented by
651 * Support for the new ELF hash table format was added by Ulrich Drepper.
653 * Support for priority inheritance mutexes added by Jakub Jelinek and
656 * Support for priority protected mutexes added by Jakub Jelinek.
658 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
659 or_IN, csb_PL, fy_NL, sr_ME.
663 * More overflow detection functions.
665 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
666 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
668 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
669 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
670 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
671 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
672 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
673 by Masahide Washizawa.
675 * It is now possible to install audit libraries for the dynamic linker using
676 LD_AUDIT. Implemented by Ulrich Drepper.
678 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
679 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
680 For a libc and libpthread that works well on Linux 2.4 kernels, we
681 recommend using the stable 2.3 branch.
683 * The new function open_wmemstream acts like open_memstream,
684 but uses a wchar_t wide character buffer.
686 * The new function ppoll is an improved version of poll, similar to pselect.
688 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
689 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
690 renameat, unlinkat, linkat, symlinkat, readlinkat.
692 * New Linux kernel system calls: unshare,
693 inotify_init, inotify_add_watch, inotify_rm_watch.
695 * The euidaccess function is now also known by the alias eaccess,
696 for compatibility with some other systems.
698 * Timezone data updated to 2006b version.
702 * The following bugs are resolved with this release:
704 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
705 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
706 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
707 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
708 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
709 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
711 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
713 * As of this release, GCC 4 can be used to compile the C Library.
715 * Timezone data updated to 2005m version.
719 * The following bugs are resolved with this release:
721 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
722 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
723 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
724 777, 787, 821, 822, 823, 825
726 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
730 * Support for RFC 3678. Real implementations exist only for Linux so far.
731 Implemented by Ulrich Drepper.
733 * nscd can now cache entries persistently. Expiring entries are reloaded.
734 For speedups the cache can be shared in memory with client processes.
735 Implemented by Ulrich Drepper.
737 * nscd can now perform SELinux checks.
738 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
740 * getaddrinfo queries are now cached. Canonical name lookup is performed
742 Implemented by Ulrich Drepper.
744 * The nothrow function attribute is used when headers are used by gcc when
745 compiling C code. This can avoid significant amounts of exception
748 * The malloc functions perform more error checking and are stricter when
749 it comes to reacting on errors. The default action is to terminate
750 the process after showing an error message. Implemented by Ulrich Drepper.
752 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
753 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
755 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
756 namespaces using the new function dlmopen(). This feature is of course,
757 like most other dynamic loading functionality, not available in statically
758 linked applications. Implemented by Ulrich Drepper.
760 * Low-overhead boundary checking variants of string and some stdio functions
761 were added. These are to be used in conjunction with a gcc patch by
762 Jakub Jelinek which adds calls to these functions if possible.
763 Implemented by Jakub Jelinek and Ulrich Drepper.
765 * Old code for several operating systems and machine architectures that
766 have not been in working condition in a long time have been removed from
767 the main source tree maintained by the GNU C Library's maintainers.
768 These files are now reside in the separate `ports' source module
769 that is usable as an add-on when building the library.
773 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
774 interrogate the dynamic linker, compatible with the Solaris interface.
776 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
777 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
779 * getifaddrs now uses the netlink interface on Linux to get its information.
780 Implemented by Thorsten Kukuk.
782 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
783 Implemented by Ulrich Drepper.
785 * support for non-executable stacks on x86 has been added. Changes mostly
788 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
791 * getaddrinfo now performs destination address selection according to
796 * Thread-safe interfaces for many functions that access locale data
797 were added in version 2.3, but these features were omitted from NEWS.
798 Many functions have variants with an `_l' suffix that take a `locale_t'
799 object as a parameter rather than consulting the current locale.
800 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
801 create and maintain `locale_t' objects. Additionally, the new function
802 `uselocale' sets "the current locale" (as used by functions not so
803 parameterized) set for an individual thread. These features were added
804 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
806 * The functions getresuid, getresgid, setresuid, and setresgid, which
807 have long been available on Linux, are now declared in <unistd.h>
808 and are now also available on the Hurd.
810 * ELF thread-local storage support (TLS) now works on x86-64.
812 * The new dynamic string token $LIB is expanded in shared library names.
813 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
815 * Aldy Hernandez contributed complete software floating point support for
816 PowerPC machines with no FPU.
818 * fexecve is implemented on Linux.
820 * The `btowc' function should work at least twice as fast due to
821 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
823 * With approriate thread add-ons cancelable functions are now implemented
824 in libc.so as well. No need to call the function in libpthread. This
825 change allowed to finally disable the incorrect and expensive handling
826 of weak definition in ld.so.
828 * Yet more PLT entries in libc.so have been removed. We finally arrived
829 at the bare minimum. Startup times improved appropriately.
831 * Support for the new Linux/x86 system call interface was added. The
832 AT_SYSINFO auxiliary vector entry is recognized and handled.
836 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
839 * iconv (the program and the interface) now accepts empty names (excluding
840 options like //TRANSLIT) to mean "use charset of current locale".
842 * localedef can now transliterate characters in strings which are not in
843 the provided charmap. The information from the input locale is used.
845 * Prelinking support was added for ELF targets. This requires additional
846 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
848 * Read-only stdio streams now use mmap to speed up operation by eliminating
849 copying and buffer underflows. To use add 'm' to the mode string of
850 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
852 * The malloc functions were completely rewritten by Wolfram Gloger based
853 on Doug Lea's malloc-2.7.0.c.
855 * Isamu Hasegawa contributed a completely new and POSIX-conformant
856 implementation of regex.
858 * Bruno Haible upgraded the iconv and locale implementation to support
861 * Contents of the LC_* and LANG environment variables in the CEN style are
862 not recognized anymore. It never was used. Change by Ulrich Drepper.
864 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
865 thread-local storage (TLS) ABI on some platforms.
866 Changes by Ulrich Drepper. SH support by Kaz Kojima.
868 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
869 EUC-JISX0213, and TSCII.
871 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
872 BSD-compatible interface for getting all network interface addresses.
873 Implementation for IPv4 by Roland McGrath.
875 * Loading of locale data is faster due to the introduction of a locale
876 archive. Implemented by Roland McGrath and Ulrich Drepper.
878 * Startup times are significantly reduced by not using exported functions
879 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
882 * Steven Munroe contributed a port to PowerPC64/Linux.
886 * The Hurd now uses the GNU libio implementation of stdio rather than the
887 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
889 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
890 with the same behavior as the Linux system call of the same name.
894 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
895 128-bit long double format.
897 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
898 IBM1161, and IBM1162 charsets.
900 * Andreas Jaeger contributed a port to x86-64/Linux.
902 * Peter Bruin contributed a port to PowerPC/Hurd.
904 * libc functions using I/O streams now can handle wide-oriented streams
907 * optimizations in the dynamic linker. Binaries created by recent binutils
908 versions start up quicker due to reduced time spent on relocations.
910 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
914 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
915 asinh, atanh, j0 for the 128-bit long double format.
917 * Bruno Haible updated all the code handling Unicode in some form to
920 * Speed of regex for single-byte locales is back to previous levels.
921 Patch by Isamu Hasegawa.
923 * Alpha, SPARC, and IA-64 now also using floating stacks.
925 * Startup time of internationalized applications greatly improved through
926 iconv cache. Use iconvconfig to generate the cache file.
927 Contributed by Ulrich Drepper.
929 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
930 severe performance problems. Patch by David Mosberger.
932 * The Hurd port got a lot more functionality like AIO, various stdio
933 extensions, etc. Mainly done by Roland McGrath.
935 * mtrace can now lookup symbols in shared libraries.
939 * Intel's IA-64 math library is largely integrated. It provides fast and
940 accurate implementatations for most basic and standard math functions
941 in float, double, and long double format.
943 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
944 and asin for the 96-bit long double format and asin, log, tan for the
945 128-bit long double format.
947 * The beginning of a last-bit accurate math library by IBM Haifa were added.
948 The basic double functions exist today. Contributed by Abraham Ziv
949 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
950 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
952 * An asynchronous name lookup library was added. The interface is designed
953 after POSIX AIO. The proposal was circulated beforehand to get comments.
954 No negative ones came in. Implemented by Ulrich Drepper.
956 * Port to S390/64bit contributed by Martin Schwidefsky
957 <schwidefsky@de.ibm.com>.
959 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
960 of functions for Linux/IA-64.
962 * The RPC code is now thread safe. Threads can now use the same service
963 of different services at the same time. Patch by Eric Norum
964 <eric.norum@usask.ca> with some help by Ulrich Drepper.
966 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
967 family of functions for Linux/S390.
969 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
970 of functions for Linux/x86.
972 * Port to Linux/CRIS contributed by Axis Communications.
976 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
977 we can now check for namespace violations and missing declarations. The
978 result is that almost all headers are now Unix-compliant (as defined in
979 the upcoming XPG6). The negative side is that some programs might need
980 corrections, too, if they depend on the incorrect form of the headers in
981 previous versions which defined too many symbols and included too many
984 * regex now handles multibyte character sets correctly.
985 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
987 * iconv (the program) does now conform to the upcoming XPG6 and handles
988 charmaps. Instead of the charset names the path of charmaps can be
989 provided and the conversion happens based on this data.
990 Contributed by Ulrich Drepper.
992 * The locale program now provides detailed information about the installed
997 only lists the names of the supported locales
1001 provides details such as country, language, and codeset name.
1002 Contributed by Ulrich Drepper.
1006 * The gencat program now parses the input file according to the charset
1007 selected by the LC_CTYPE category. This is important for stateful
1008 character sets. To make generating catalogs easier there is a way
1009 to overwrite the charset selected by the locale: before the first
1010 message or $ quote line the catalog can contain a line like
1012 $ codeset=ISO-8859-2
1014 to select the charset (ISO-8859-2 in this case).
1016 Implemented by Shinya Hanataka and Ulrich Drepper.
1018 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1019 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1020 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1022 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1023 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1025 * The LANGUAGE environment variable is now ignored unless the locale is
1026 changed from the default "C" locale.
1028 * The usual bug fixes.
1032 * Greg McGary added runtime support for bounds checking using gcc's
1033 new -fbounded-pointers option. ix86 target is complete. PowerPC
1036 * Thorsten Kukuk added secure mode support to nscd.
1038 * The Berkeley db libraries have been removed.
1040 Related, the nss_db module is now in a separate package since it
1041 obviously requires a database library being available.
1043 * Wide character I/O streams implemented by Ulrich Drepper.
1045 * Functions from the extended socket API added by Ulrich Drepper.
1047 * Functions feenableexcept and fedisableexcept to control the
1048 behaviour of individual exceptions have been added by Andreas Jaeger.
1050 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1052 * The resolver code has been updated from bind 8.2.3-T5B which supports
1053 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1056 This change could in some situations effect backward compatibility. Since
1057 now `_res' is a thread-local instead of a global variable, modifying it
1058 in one thread does not have any effect in other threads.
1060 The resolver library was also extended to allow IPv6 as the transport
1061 protocol for the requests. This work was done by Stig Venaas.
1063 * Compatibility code for K&R C compilers has been removed from the
1064 header files. A ISO C compiler is needed to use the library
1065 (conforming to either C89 or C99 standard).
1067 * Complete rewrite of the localedef program to support multibyte character
1068 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1069 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1070 Implemented by Ulrich Drepper.
1072 Bruno Haible significantly improved the generation and use of the data
1073 structures for the wide character tables.
1075 * Plural handling in gettext implemented by Ulrich Drepper.
1077 * The utmp daemon has been removed.
1079 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1081 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1084 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1086 * POSIX barriers implemented by Kaz Kylheku.
1088 * POSIX spawn function family implemented by Ulrich Drepper.
1090 * POSIX spinlocks are now available.
1092 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1094 * the configure option --enable-kernel=X.Y.Z allows to strip out
1095 compatibility for kernel versions before X.Y.Z. This is currently only
1096 implemented for Linux.
1098 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1099 field sin6_scope_id. This means that all programs using IPv6 should be
1100 recompiled. Don't expect binary compatibility with previous glibc
1103 * various conversion modules for IBM character sets contributed by
1106 * IA-64 port by Jes Sorensen and HJ Lu.
1120 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1122 * New xdr functions are added; some rpc functions are now 64bit clean.
1124 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1126 * Fixed known incompatibilities with glibc 2.0.
1128 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1130 * Optimized a number of functions (especially the ELF dynamic loader).
1132 * Update timezone data files.
1134 * lots of charmaps corrections
1136 * some new locale definitions and charmaps
1141 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1142 conform to POSIX member type requirements. Symbol versions have been
1143 adjusted as needed within the library, and for direct use by applications,
1144 but there is potential for problems if third-party libraries use
1145 struct timeval as part of their interface. This does not present
1146 a problem for X and other "essential" system libraries.
1148 * An additional locale model to support C++ Standard Library locale
1149 model and probably more was implemented by Ulrich Drepper.
1151 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1154 * Miles Bader provided the `argp' function family to support hierachical
1155 command line argument parsing, layered on top of getopt.
1157 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1159 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1162 * scanf recognizes the %a and %A format for scanning floating point numbers.
1164 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1165 information and interfaces for the available integer types.
1167 * about 130 new math functions were added to implement the ISO C9x math
1170 * the new header <complex.h> contains definitions of the complex math
1171 functions from ISO C 9X.
1173 * the new header <tgmath.h> defines generic macros to use complex or
1174 real valued functions.
1176 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1178 * Andreas Jaeger provided a test suite for the math library.
1180 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1182 * Ulrich Drepper added character set conversion functions (iconv).
1184 * Optimized string functions have been added.
1186 * The localedata addon is now part of glibc.
1188 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1190 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1191 daemon for NSS (nscd).
1193 Missing a better place here are some numbers on improvements. Under
1194 Linux 2.1.125 un-tar-ing the kernel sources takes
1198 using local files 12.19s 6.88s 22.91s
1200 using NIS 13.92s 8.91s 26.34s
1202 using NIS & nscd 10.37s 7.34s 25.30s
1204 using NIS+ 27.57s 30.37s 640.46s
1206 using NIS+ & nscd 10.25s 7.83s 26.51s
1208 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1210 Keep in mind that non-namelookup related operations dominate above times.
1211 It was just a common complain that using NIS+ unpacking the kernel is
1214 [1] The old nscd implementation is not available anymore since it was
1215 distributed with glibc up to version 2.0.98 and thus is now replaced.
1217 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1219 * Mark Kettenis provided a Hesiod NSS module.
1221 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1222 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1224 * rcmd can now handle netgroups (Dick Streefland).
1226 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1229 * Support for the IPv6 protocol has been added to the socket API, as per the
1230 latest draft standards.
1232 * Support for Linux 2.2 has been added.
1234 * Interface changes relative to the latest 2.0.x release:
1235 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1236 addseverity NEW: Unix98
1237 alphasort64 NEW: LFS
1238 argp_err_exit_status NEW: argp, GNU ext
1239 argp_error NEW: argp, GNU ext
1240 argp_failure NEW: argp, GNU ext
1241 argp_help NEW: argp, GNU ext
1242 argp_parse NEW: argp, GNU ext
1243 argp_program_bug_address NEW: argp, GNU ext
1244 argp_program_version NEW: argp, GNU ext
1245 argp_program_version_hook NEW: argp, GNU ext
1246 argp_state_help NEW: argp, GNU ext
1247 argp_usage NEW: argp, GNU ext
1248 authdes_create NEW: Secure RPC
1249 authdes_getucred NEW: Secure RPC
1250 authdes_pk_create NEW: Secure RPC
1251 backtrace NEW: GNU ext.
1252 backtrace_symbols NEW: GNU ext.
1253 backtrace_symbols_fd NEW: GNU ext.
1255 cacosf NEW: ISO C 9x
1256 cacosh NEW: ISO C 9x
1257 cacoshf NEW: ISO C 9x
1258 cacoshl NEW: ISO C 9x
1259 cacosl NEW: ISO C 9x
1266 casinf NEW: ISO C 9x
1267 casinh NEW: ISO C 9x
1268 casinhf NEW: ISO C 9x
1269 casinhl NEW: ISO C 9x
1270 casinl NEW: ISO C 9x
1272 catanf NEW: ISO C 9x
1273 catanh NEW: ISO C 9x
1274 catanhf NEW: ISO C 9x
1275 catanhl NEW: ISO C 9x
1276 catanl NEW: ISO C 9x
1277 cbc_crypt NEW: Secure RPC
1281 ccoshf NEW: ISO C 9x
1282 ccoshl NEW: ISO C 9x
1288 cimagf NEW: ISO C 9x
1289 cimagl NEW: ISO C 9x
1290 clearerr_locked REMOVED
1291 clntunix_create NEW: sunrpc ext
1293 clog10 NEW: ISO C 9x
1294 clog10f NEW: ISO C 9x
1295 clog10l NEW: ISO C 9x
1305 cprojf NEW: ISO C 9x
1306 cprojl NEW: ISO C 9x
1308 crealf NEW: ISO C 9x
1309 creall NEW: ISO C 9x
1314 csinhf NEW: ISO C 9x
1315 csinhl NEW: ISO C 9x
1318 csqrtf NEW: ISO C 9x
1319 csqrtl NEW: ISO C 9x
1323 ctanhf NEW: ISO C 9x
1324 ctanhl NEW: ISO C 9x
1326 des_setparity NEW: Secure RPC
1327 ecb_crypt NEW: Secure RPC
1328 endutxent NEW: Unix98
1330 exp10f NEW: ISO C 9x
1331 exp10l NEW: ISO C 9x
1335 fattach NEW: STREAMS
1336 fdetach NEW: STREAMS
1340 feclearexcept NEW: ISO C 9x
1341 fegetenv NEW: ISO C 9x
1342 fegetexceptflag NEW: ISO C 9x
1343 fegetround NEW: ISO C 9x
1344 feholdexcept NEW: ISO C 9x
1346 feraiseexcept NEW: ISO C 9x
1347 ferror_locked REMOVED
1348 fesetenv NEW: ISO C 9x
1349 fesetexceptflag NEW: ISO C 9x
1350 fesetround NEW: ISO C 9x
1351 fetestexcept NEW: ISO C 9x
1352 feupdateenv NEW: ISO C 9x
1353 fflush_locked REMOVED
1357 fgets_unlocked NEW: GNU ext.
1358 fileno_locked REMOVED
1370 fputc_locked REMOVED
1371 fputs_unlocked NEW: GNU ext.
1372 fread_unlocked NEW: GNU ext.
1377 fstatvfs NEW: Unix98
1381 ftruncate64 NEW: LFS
1383 fwrite_unlocked NEW: GNU ext.
1384 gai_strerror NEW: IPv6
1388 getchar_locked REMOVED
1390 getdate_err NEW: Unix98
1391 getdate_r NEW: GNU ext.
1393 getnameinfo NEW: IPv6
1394 getnetname NEW: Secure RPC
1395 getpmsg NEW: STREAMS
1396 getpt NEW: Unix98 PTY
1397 getrlimit64 NEW: LFS
1398 getutxent NEW: Unix98
1399 getutxid NEW: Unix98
1400 getutxline NEW: Unix98
1401 glob64 NEW: GNU ext.
1402 globfree64 NEW: GNU ext.
1403 gnu_get_libc_release NEW: GNU ext.
1404 gnu_get_libc_version NEW: GNU ext.
1405 grantpt NEW: Unix98 PTY
1406 host2netname NEW: Secure RPC
1408 iconv_close NEW: iconv
1409 iconv_open NEW: iconv
1410 if_freenameindex NEW: IPv6
1411 if_indextoname NEW: IPv6
1412 if_nameindex NEW: IPv6
1413 if_nametoindex NEW: IPv6
1414 in6addr_any NEW: IPv6
1415 in6addr_loopback NEW: IPv6
1416 inet6_isipv4mapped NEW: IPv6
1417 isastream NEW: STREAMS
1418 iswblank NEW: GNU ext.
1419 key_decryptsession NEW: Secure RPC
1420 key_decryptsession_pk NEW: Secure RPC
1421 key_encryptsession NEW: Secure RPC
1422 key_encryptsession_pk NEW: Secure RPC
1423 key_gendes NEW: Secure RPC
1424 key_get_conv NEW: Secure RPC
1425 key_secretkey_is_set NEW: Secure RPC
1426 key_setnet NEW: Secure RPC
1427 key_setsecret NEW: Secure RPC
1428 llrint NEW: ISO C 9x
1429 llrintf NEW: ISO C 9x
1430 llrintl NEW: ISO C 9x
1431 llround NEW: ISO C 9x
1432 llroundf NEW: ISO C 9x
1433 llroundl NEW: ISO C 9x
1438 lrintf NEW: ISO C 9x
1439 lrintl NEW: ISO C 9x
1440 lround NEW: ISO C 9x
1441 lroundf NEW: ISO C 9x
1442 lroundl NEW: ISO C 9x
1444 makecontext NEW: Unix98
1445 mempcpy NEW: GNU ext.
1448 modify_ldt NEW: kernel
1452 nearbyint NEW: ISO C 9x
1453 nearbyintf NEW: ISO C 9x
1454 nearbyintl NEW: ISO C 9x
1455 netname2host NEW: Secure RPC
1456 netname2user NEW: Secure RPC
1457 nexttoward NEW: ISO C 9x
1458 nexttowardf NEW: ISO C 9x
1459 nexttowardl NEW: ISO C 9x
1463 passwd2des NEW: Secure RPC
1465 pow10f NEW: GNU ext.
1466 pow10l NEW: GNU ext.
1469 printf_size NEW: GNU ext.
1470 printf_size_info NEW: GNU ext.
1471 profil_counter REMOVED
1472 pthread_mutexattr_getkind_np REPLACED
1473 pthread_mutexattr_setkind_np REPLACED
1474 ptsname NEW: Unix98 PTY
1475 ptsname_r NEW: Unix98 PTY
1477 putchar_locked REMOVED
1478 putgrent NEW: GNU ext.
1480 putpmsg NEW: STREAMS
1481 pututxline NEW: Unix98
1485 readdir64_r NEW: LFS
1486 remquo NEW: ISO C 9x
1487 remquof NEW: ISO C 9x
1488 remquol NEW: ISO C 9x
1490 roundf NEW: ISO C 9x
1491 roundl NEW: ISO C 9x
1493 scalbln NEW: ISO C 9x
1494 scalblnf NEW: ISO C 9x
1495 scalblnl NEW: ISO C 9x
1497 sendfile NEW: kernel
1498 setcontext NEW: Unix98
1499 setrlimit64 NEW: LFS
1500 setutxent NEW: Unix98
1502 sigignore NEW: Unix98
1503 sigqueue NEW: POSIX.1b
1504 sigrelse NEW: Unix98
1505 sigset NEW: POSIX.1b
1506 sigtimedwait NEW: POSIX.1b
1507 sigwaitinfo NEW: POSIX.1b
1508 sincos NEW: GNU ext.
1509 sincosf NEW: GNU ext.
1510 sincosl NEW: GNU ext.
1514 strcasestr NEW: GNU ext.
1515 strtoimax NEW: ISO C 9x
1516 strtoumax NEW: ISO C 9x
1517 strverscmp NEW: GNU ext.
1518 svcauthdes_stats NEW: Secure RPC
1519 svcunix_create NEW: sunrpc etx
1520 svcunixfd_create NEW: sunrpc ext
1521 swapcontext NEW: Unix98
1522 tcgetsid NEW: Unix98 PTY
1523 tdestroy NEW: GNU ext.
1524 tgamma NEW: ISO C 9x
1525 tgammaf NEW: ISO C 9x
1526 tgammal NEW: ISO C 9x
1530 truncf NEW: ISO C 9x
1531 truncl NEW: ISO C 9x
1533 unlockpt NEW: Unix98 PTY
1534 updwtmpx NEW: Unix98
1535 user2netname NEW: Secure RPC
1536 utmpxname NEW: Unix98
1537 versionsort NEW: GNU ext.
1538 versionsort64 NEW: GNU ext.
1540 wcscasecmp NEW: GNU ext.
1541 wcsncasecmp NEW: GNU ext.
1542 wcsnlen NEW: GNU ext.
1543 wcstoimax NEW: ISO C 9x
1544 wcstoll NEW: ISO C 9x
1545 wcstoull NEW: ISO C 9x
1546 wcstoumax NEW: ISO C 9x
1548 wordexp NEW: POSIX.2
1549 wordfree NEW: POSIX.2
1550 write_profiling REMOVED
1551 xdecrypt NEW: Secure RPC
1552 xdr_authdes_cred NEW: Secure RPC
1553 xdr_authdes_verf NEW: Secure RPC
1554 xdr_cryptkeyarg NEW: Secure RPC
1555 xdr_cryptkeyarg2 NEW: Secure RPC
1556 xdr_cryptkeyres NEW: Secure RPC
1557 xdr_getcredres NEW: Secure RPC
1558 xdr_key_netstarg NEW: Secure RPC
1559 xdr_key_netstres NEW: Secure RPC
1560 xdr_keybuf NEW: Secure RPC
1561 xdr_keystatus NEW: Secure RPC
1562 xdr_netnamestr NEW: Secure RPC
1563 xdr_sizeof NEW: Secure RPC
1564 xdr_unixcred NEW: sunrpc ext
1565 xencrypt NEW: Secure RPC
1566 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1577 * inet_ntoa is thread-safe
1579 * updwtmp is moved from libutil to libc
1581 * rewrite of cbrt function
1583 * update of timezone data
1597 * add atoll function
1599 * fix complex problems in Berkeley DB code
1601 * fix math functions
1605 * fixed lots of header problems (especially Linux/GNU specific)
1607 * dynamic loader preserves all registers
1609 * Roland McGrath provided support for handling of auxiliary objects in
1610 the ELF dynamic loader.
1612 * support for parallel builds is improved
1616 * GNU extensions are no longer declared by default. To enable them you
1617 must define the macro `_GNU_SOURCE' in your program or compile with
1620 * The library has changed from using GNU ld symbol aliases to using weak
1621 symbols where available. The ELF object file format supports weak
1622 symbols; GNU ld also supports weak symbols in the a.out format. (There
1623 is also now support for other GNU ld extensions in ELF. Use the
1624 `--with-elf' option to configure to indicate you have ELF, and
1625 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1626 of many files which contained only symbol aliases, reducing the size of
1627 the source and the compiled library; many other files were renamed to
1628 less cryptic names previously occupied by the symbol alias files.
1629 There is a new header file <elf.h> for programs which operate on
1630 files in the ELF format.
1632 * Converted to Autoconf version 2, so `configure' has more options.
1633 Run `configure --help' to see the details.
1635 * The library can now be configured to build profiling, highly-optimized
1636 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1637 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1638 `configure' enable building these extra libraries. The shared library is
1639 built by default when using both ELF and GNU ld. When shared libraries
1640 are enabled, the new library `-ldl' is available for arbitrary run-time
1641 loading of shared objects; its interface is defined in <dlfcn.h>. The
1642 new header file <link.h> gives access to the internals of the run-time
1643 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1644 application of same name on other systems and it provides information
1645 about dynamically linked binaries.
1647 * The C library now provides the run-time support code for profiling
1648 executables compiled with `-pg'. Programs can control the profiling code
1649 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1650 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1651 the support for this file format was contributed by David Mosberger-Tang.
1653 * The math code has been replaced with a math library based on fdlibm from
1654 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1655 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1656 functions. The math functions now reside in a separate library, so
1657 programs using them will need to use `-lm' their linking commands.
1659 * John C. Bowman contributed optimized ix87 assembler inline functions.
1661 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1662 mechanism similar to that found in Solaris 2. This is now used for the
1663 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1664 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1665 file controls what services are used for each individual database. This
1666 works by loading shared libraries with names specified in `nsswitch.conf',
1667 so service modules can be changed or added at any time without even
1668 relinking any program. Currently there are the file, db, and NIS based
1669 NSS services available.
1671 * The new functions `strtoq' and `strtouq' parse integer values from
1672 strings, like `strtol' and `strtoul', but they return `long long int' and
1673 `unsigned long long int' values, respectively (64-bit quantities).
1675 * The new functions `strtof' and `strtold' parse floating-point values from
1676 strings, like `strtod', but they return `float' and `long double' values,
1677 respectively (on some machines `double' and `long double' are the same).
1679 * Ulrich Drepper has contributed new implementations of the floating-point
1680 printing and reading code used in the `printf' family of functions and
1681 `strtod', `strtof', and `strtold'. These new functions are perfectly
1682 accurate, and much faster than the old ones.
1684 * The implementation of the POSIX locale model was completely rewritten by
1685 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1686 to compile the POSIX locale definition.
1688 * The former dummy implementations of the strcoll and strxfrm function are
1689 now replaced by fully functional code contributed by Ulrich Drepper. The
1690 collation information comes from the POSIX locale definitions.
1692 * The new header <langinfo.h> defines an interface for accessing
1693 various locale-dependent data (using the locale chosen with `setlocale').
1695 * Ulrich Drepper has contributed a new suite of functions for operation on
1696 wide-character and multibyte-character strings, in <wchar.h>;
1697 and classification and case conversion of wide characters, in <wctype.h>.
1698 These new functions are conforming to the ISO C, Amendement 1 specification.
1700 * There is now a second implementation of the standard I/O library available.
1701 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1702 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1704 * You can now use positional parameter specifications in format strings
1705 for the `printf' and `scanf' families of functions. For example,
1706 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1707 ``Number 6, Mr Jones''. This is mainly useful when providing different
1708 format strings for different languages, whose grammars may dictate
1709 different orderings of the values being printed. To support this
1710 feature, the interface for `register_printf_handler' has changed; see
1711 the header file <printf.h> for details.
1713 * The `printf' and `scanf' families of functions now understand a new
1714 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1715 to group numbers as indicated by the locale; for `scanf' and friends, this
1716 says to accept as valid only a number with all the proper grouping
1717 separators in the right places. In the default "C" locale, numbers are
1718 not grouped; but locales for specific countries will define the usual
1719 conventions (i.e. separate thousands with `,' in the US locale).
1721 * The pgrp functions have been regularized, slightly incompatibly but much
1722 less confusingly. The core functions are now `getpgid' and `setpgid',
1723 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1724 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1725 provided for compatibility. There is no longer an incompatible `getpgrp'
1726 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1728 * The new header file <fts.h> and suite of functions simplify programs that
1729 operate on directory trees. This code comes from 4.4 BSD.
1731 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1732 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1733 NSS scheme used in glibc.
1735 * There is a new malloc debugging hook `__memalign_hook'.
1737 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1738 `unsigned int' in <sys/types.h>. These are for compatibility only and
1739 their use is discouraged.
1741 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1742 done differently, so that it works even without GNU ld.
1744 * New function `euidaccess' checks allowed access to a file like `access',
1745 but using the effective IDs instead of the real IDs.
1747 * The time zone data files have been updated for the latest and greatest
1748 local time conventions of the countries of the world.
1750 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1753 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1754 for formatting floating-point numbers. They are provided only for
1755 compatibility; new programs should use `sprintf' instead. There are
1756 also equivalent function for the `long double' floating-point type and
1757 all functions also exist in a reentrant form.
1759 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1760 functions for maintaining the login-record files (primarily of use to
1761 system programs such as `login'), and convenient functions for
1762 allocating and initializing a pseudo-terminal (pty) device.
1764 * Ulrich Drepper has contributed new support for System V style
1765 shared memory and IPC on systems that support it.
1767 * Ulrich Drepper has contributed several miscellaneous new functions found
1768 in System V: The `hsearch' family of functions provide an effective
1769 implementation of hash tables; `a64l' and `l64a' provide a very simple
1770 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1773 * Ulrich Drepper has contributed new reentrant counterparts for the
1774 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1776 * Ulrich Drepper has contributed new, highly-optimized versions of several
1777 string functions for the i486/Pentium family of processors.
1779 * Ulrich Drepper has updated the Linux-specific code, based largely
1780 on work done in Hongjiu Lu's version of GNU libc for Linux.
1781 The GNU library now supports Linux versions 2.0.10 and later,
1782 using the ELF object file format (i[3456]86-*-linux).
1784 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1786 * David Mosberger-Tang and Richard Henderson have ported the C library
1787 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1788 dynamic linking support for ELF/Alpha.
1790 * Richard Henderson contributed several Alpha optimized assembler function
1791 for arithmetic and string handling.
1793 * Ulrich Drepper has contributed a new set of message catalog functions to
1794 support multiple languages using the <libintl.h> interface, for use with
1795 his new package GNU gettext. Translation volunteers have contributed
1796 catalogs of the library's messages in Spanish, German, and Korean.
1798 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1799 program and the `catgets' function for reading the catalog files it
1800 creates. (The <libintl.h> interface is preferred; we include the
1801 <nl_types.h> interface using `catgets' only for source compatibility with
1802 programs already written to use it.)
1804 * New header file <values.h> gives SVID-compatible names for <limits.h>
1807 * Various new macros, declarations, and small header files for compatibility
1810 * New function `group_member' is a convenient way to check if a process has
1811 a given effective group ID.
1813 * When using GCC 2.7 and later, the socket functions are now declared in a
1814 special way so that passing an argument of type `struct sockaddr_in *',
1815 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1816 `struct sockaddr *' type, does not generate a type-clash warning.
1818 * New function `error' declared in header file <error.h> is a convenient
1819 function for printing error messages and optionally exiting; this is the
1820 canonical function used in GNU programs. The new functions `err', `warn',
1821 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1822 doing the same thing.
1824 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1825 POSIX.2 `glob' function to do ~ and {...} expansion.
1827 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1828 `clearenv' which is used in POSIX.9 is also available.
1830 * New function `getsid' returns session ID number on systems that support it.
1832 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1833 files <db.h> and <mpool.h> provide a rich set of functions for several
1834 types of simple databases stored in memory and in files, and <ndbm.h> is
1835 an old `ndbm'-compatible interface using the `db' functions. Link with
1836 `-ldb' to get these functions.
1838 * New macro `strdupa' copies a string like `strdup', but uses local stack
1839 space from `alloca' instead of dynamic heap space from `malloc'.
1841 * New function `strnlen' is like `strlen' but searches only a given maximum
1842 number of characters for the null terminator. `stpncpy', `strndup' and
1843 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1846 * New function `statfs' in header <sys/statfs.h>.
1848 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1849 provide convenient functions for operating on blocks of null-terminated
1852 * A new suite of functions in <utmp.h> handle all the details of reading
1853 and writing the utmp file.
1855 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1858 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1859 completely POSIX compliant and also implemented the extended functionality
1860 to handle alternate digit representation and alternate era date formats.
1862 * Ulrich Drepper provided an implementation of the `strptime' function
1863 defined in XPG4.2 which transforms a string into a `struct tm' value.
1865 * Paul Eggert provided the tzselect shell script as part of the timezone
1866 code. The shell script makes it easy to select the correct timezone
1869 * The implementation of the malloc family of functions is completely replaced
1870 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1871 The implementation uses the mmap function (if available) and it is
1872 optimized for the use in multi threaded programs.
1874 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1875 functions. This new functionality is usable by specifying a special
1876 salt string and it is compatible with implementation on *BSD systems.
1878 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1879 `getsubopt' to handle second level command line options, `bsd_signal'
1880 to access BSD style `signal' functionality, the obsolete `regexp' style
1883 * the `lchown' function is available on system which support this
1886 * The implementation of the shadow password handling function was contributed
1889 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1891 * POSIX.1g support was added. The <sys/select.h> header is available,
1892 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1893 implementation of `getaddrinfo'.
1897 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1899 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1900 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1902 * The new function `daemon' from 4.4 BSD is useful for server programs that
1903 want to put themselves in the background.
1905 * Joel Sherrill has contributed support for several standalone boards that
1906 run without an operating system.
1908 * `printf', `scanf' and friends now accept a `q' type modifier for long
1909 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1911 * All of the code taken from BSD (notably most of the math and networking
1912 routines) has been updated from the BSD 4.4-Lite release.
1914 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1916 * The new functions `getdomainname' and `setdomainname' fetch or change the
1917 YP/NIS domain name. These are system calls which exist on systems which
1920 * The time zone data files have been updated for the latest international
1923 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1924 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1928 * The C library now includes support for Sun RPC, from Sun's free
1929 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1930 are included. (There is still no support for YP.)
1932 * Tom Quinn has contributed a port of the C library to SGI machines running
1933 Irix 4 (mips-sgi-irix4).
1935 * The new `lockf' function is a simplified interface to the locking
1936 facilities of `fcntl', included for compatibility.
1938 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1940 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1942 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1945 * The error message printed by `assert' for a failed assertion now includes
1946 the name of the program (if using GNU ld) and the name of the calling
1947 function (with versions of GCC that support this).
1949 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1951 * The library now includes the <sys/mman.h> header file and memory
1952 management functions `mmap', `munmap', `mprotect', `msync', and
1953 `madvise', on systems that support those facilities.
1955 * The interface for `mcheck' has changed slightly: the function called to
1956 abort the program when an allocation inconsistency is detected now takes
1957 an argument that indicates the type of failure. The new function
1958 `mprobe' lets you request a consistency check for a particular block at
1959 any time (checks are normally done only when you call `free' or `realloc'
1962 * It is now possible to easily cross-compile the C library, building on one
1963 system a library to run on another machine and/or operating system. All
1964 you need to do is set the variable `HOST_CC' in `configparms' to the
1965 native compiler for programs to run on the machine you are building on (a
1966 few generator programs are used on Unix systems); set `CC' to the
1969 * The new function `fexecve' (only implemented on the GNU system) executes
1970 a program file given a file descriptor already open on the file.
1974 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1975 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1977 * You can set the variable `libprefix' in `configparms' to specify a prefix
1978 to be prepended to installed library files; this makes it easy to install
1979 the GNU C library to be linked as `-lgnuc' or whatever.
1981 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1982 copies a limited number of characters from a string, and returns the
1983 address of the last character written.
1985 * You no longer need to check for whether the installed `stddef.h' is
1986 compatible with the GNU C library. configure now checks for you.
1988 * You can now define a per-stream `fileno' function to convert the
1989 stream's cookie into an integral file descriptor.
1991 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1992 allocates zero bytes of storage, and returns a unique pointer which
1993 you can pass to `realloc' or `free'. The behavior is undefined if
1994 you dereference this pointer.
1996 * The C library now runs on Sony NEWS m68k machines running either
1997 NewsOS 3 or NewsOS 4.
1999 * The new `syscall' function is a system-dependent primitive function
2000 for invoking system calls. It has the canonical behavior on Unix
2001 systems, including unreliable return values for some calls (such as
2002 `pipe', `fork' and `getppid').
2004 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2005 to `EAGAIN', which is the preferred name. On systems whose kernels
2006 use two distinct codes, the C library now translates EWOULDBLOCK to
2007 EAGAIN in every system call function.
2011 * The GNU C Library Reference Manual is now distributed with the library.
2012 `make dvi' will produce a DVI file of the printed manual.
2013 `make info' will produce Info files that you can read on line using C-h i
2014 in Emacs or the `info' program.
2015 Please send comments on the manual to bug-glibc-manual@gnu.org.
2017 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2019 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2021 * Jason Merrill has contributed a port to the Sequent Symmetry running
2022 Dynix version 3 (i386-sequent-dynix).
2024 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2025 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2027 * New function `memory_warnings' lets you arrange to get warnings when
2028 malloc is running out of memory to allocate, like Emacs gives you.
2030 * The C library now contains the relocating allocator used in Emacs 19 for
2031 its editing buffers. This allocator (ralloc) minimizes allocation
2032 overhead and fragmentation by moving allocated regions around whenever it
2033 needs to. You always refer to a ralloc'd region with a "handle" (a
2034 pointer to a pointer--an object of type `void **').
2036 * There is a new `printf' format: `%m' gives you the string corresponding
2037 to the error code in `errno'.
2039 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2040 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2041 pass, the `a' modifier says to fill in a `char **' you pass with a
2044 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2045 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2046 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2048 * `mkstemp' is a traditional Unix function to atomically create and open a
2049 uniquely-named temporary file.
2053 * The standard location for the file that says what the local timezone is
2054 has changed again. It is now `/usr/local/etc/localtime' (or more
2055 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2057 * The distribution no longer contains any files with names longer than 14
2060 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2061 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2063 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2067 * The configuration process has changed quite a bit. The `configure'
2068 script is now used just like the configuration scripts for other GNU
2069 packages. The `sysdeps' directory hierarchy is much rearranged.
2070 The file `INSTALL' explains the new scheme in detail.
2072 * The header files no longer need to be processed into ANSI C and
2073 traditional C versions. There is just one set of files to install, and
2074 it will work with ANSI or old C compilers (including `gcc -traditional').
2076 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2077 MIPS DECStation running Ultrix 4.
2079 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2080 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2081 made itself into a shared library.
2083 * Yet further improved support for the i386, running 4.3 BSD-like systems
2084 (such as Mach 3 with the Unix single-server), or System V.
2086 * New function `strncasecmp' to do case-insensitive string comparison
2087 with limited length.
2089 * New function `strsep' is a reentrant alternative to `strtok'.
2091 * New functions `scandir' and `alphasort' for searching directories.
2093 * New function `setenv' is a better interface to `putenv'.
2095 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2096 function for traversing a directory tree.
2098 * The GNU obstack package is now also part of the C library.
2099 The new function `open_obstack_stream' creates a stdio stream that
2100 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2101 formatted output directly to an obstack.
2103 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2104 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2106 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2108 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2109 things to your strings.
2111 * There are some new test programs: test-fseek, testmb, and testrand.
2113 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2114 These ports are not finished, but are a good starting place for really
2115 supporting those systems.
2117 * `/etc/localtime' is now the standard location for the file that says what
2118 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2119 This follows the general principle that `/etc' is the place for all local
2120 configuration files.
2122 * The C library header files now use `extern "C"' when used by the C++
2123 compiler, so the C library should now work with C++ code.
2125 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2126 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2129 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2130 function which uses the `merge sort' algorithm, and is said to be
2131 significantly faster than the old GNU `qsort' function. Merge sort is
2132 now the standard `qsort' function. The new algorithm can require a lot
2133 of temporary storage; so, the old sorting function is called when the
2134 required storage is not available.
2136 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2137 provides the Unix `crypt' function, plus some other entry points.
2139 * The code and header files taken from 4.4 BSD have been updated with the
2140 latest files released from Berkeley.
2142 ----------------------------------------------------------------------
2143 Copyright information:
2145 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2147 Permission is granted to anyone to make or distribute verbatim copies
2148 of this document as received, in any medium, provided that the
2149 copyright notice and this permission notice are preserved,
2150 thus giving the recipient permission to redistribute in turn.
2152 Permission is granted to distribute modified versions
2153 of this document, or of portions of it,
2154 under the above conditions, provided also that they
2155 carry prominent notices stating who last changed them.
2158 version-control: never
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