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, 14252, 14283, 14298, 14303, 14307, 14328, 14331,
16 14336, 14337, 14347, 14349, 14376, 14459, 14476, 14477, 14505, 14510,
17 14516, 14518, 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14562,
18 14576, 14579, 14583, 14587, 14621, 14638, 14645, 14648.
20 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
21 Optimized versions of memcpy, memset, and memcmp added for System z10 and
23 Implemented by Andreas Krebbel.
25 * The new function secure_getenv allows secure access to the environment,
26 returning NULL if running in a SUID/SGID process. This function replaces
27 the internal function __secure_getenv.
29 * SystemTap static probes have been added into the dynamic linker.
30 Implemented by Gary Benson.
32 * Optimizations of string functions strstr, strcasestr and memmem.
33 Implemented by Maxim Kuvyrkov.
35 * The minimum Linux kernel version that this version of the GNU C Library
36 can be used with is 2.6.16.
38 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
39 powerpc POWER7. Implemented by Will Schmidt.
41 * New configure option --disable-nscd builds the C library such that it
42 never attempts to contact the Name Service Caching Daemon (nscd).
43 New configure option --disable-build-nscd avoids building nscd itself;
44 this is the default if --disable-nscd is used.
46 * The ttyname and ttyname_r functions on Linux now fall back to searching for
47 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
48 allows creation of chroots without the procfs mounted on /proc.
53 * The following bugs are resolved with this release:
55 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
56 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
57 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
58 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
59 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
60 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
61 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
62 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
63 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
64 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
65 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
66 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
67 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
68 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
69 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
70 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
71 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
72 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
73 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
74 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
75 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
76 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
79 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
80 configuring glibc with:
81 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
82 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
83 Implemented by H.J. Lu.
87 + define static_assert
91 + declare at_quick_exit and quick_exit also for ISO C11
93 + aligned_alloc. NB: The code is deliberately allows the size parameter
94 to not be a multiple of the alignment. This is a moronic requirement
95 in the standard but it is only a requirement on the caller, not the
100 + uchar.h support added
102 + CMPLX, CMPLXF, CMPLXL added
104 Implemented by Ulrich Drepper.
106 * Support for the IA-64 has been moved to ports.
108 * Remove support for anything but ELF binary format
110 * Checking versions of poll, ppoll added.
111 Implemented by Ulrich Drepper.
113 * More generic and 64-bit performance optimizations to math functions.
114 Implemented by Ulrich Drepper.
116 * New configure option --enable-obsolete-rpc makes the deprecated RPC
117 headers and functions available at compile time as they were before
118 version 2.14. This option will be removed at some time in the future
119 after the TI-RPC library becomes fully sufficient for the needs of
120 existing applications.
122 * Compatibility code for Linux kernel versions before 2.4 has been removed.
123 Note that glibc is not expected to work with any Linux kernel version
126 * New header <sys/auxv.h> and function getauxval allowing easy access to
127 the AT_* key-value pairs passed from the Linux kernel. The header also
128 defines the HWCAP_* bits associated with the AT_HWCAP key.
130 * New locales: mag_IN
132 * New configure option --enable-systemtap builds SystemTap static probes
133 into libc for setjmp and longjmp and into libpthread for various operations.
134 So far the setjmp/longjmp probes and some of the libpthread probes are
135 provided only for i*86 and x86_64.
136 Implemented by Roland McGrath and Rayson Ho.
138 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
140 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
143 * More optimized functions for SPARC. Implemented by David S. Miller.
145 * Improved support for cross-compilation, especially bootstrap builds
146 without a previously built glibc.
148 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
149 Chris Metcalf from Tilera.
151 * Support for the old ARM ABI has been removed from ports. Only the EABI is
152 now supported for ARM processors.
154 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
155 as the name of the dynamic linker, to distinguish it from the
156 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
158 * Support for CRIS has been removed from ports.
160 * A new class of installed header has been documented for low-level
161 platform-specific functionality. PowerPC added the first instance with a
162 function to provide time base register access. Contributed by Tulio
163 Magno Quites Machado Filho.
165 * ix86 configurations now install header files that are consistent with
166 what x86-64 configurations install. These same header files can be used
167 for -m32, -m64, or -mx32 builds.
168 Contributed by H.J. Lu.
170 * Math library bug fixes. A thorough audit of all open math library bugs was
171 conducted by Joseph Myers. Significant progress was made on many math
172 library bugs resulting in more accurate exceptions and function results.
173 Many thanks to all those that contributed including Andreas Jaeger for his
174 patch review and work on the x87 trigonometric instruction issues.
176 * Timezone data is no longer installed. Timezone-related binaries and scripts
177 will continue to be installed. Users should obtain their timezone data from
178 their distribution provider or from the tzdata package at
179 <ftp://munnari.oz.au/pub/>.
183 * The following bugs are resolved with this release:
185 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
186 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
187 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
188 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
189 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
190 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
191 13484, 13506, 13515, 13523, 13524, 13538, 13540
193 * New program pldd to list loaded object of a process
194 Implemented by Ulrich Drepper.
196 * Add nss_db support back to glibc. No more dependency on Berkeley db
197 and support for initgroups lookups.
198 Implemented by Ulrich Drepper.
200 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
201 Contributed by HJ Lu.
203 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
204 Contributed by HJ Lu.
206 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
207 on x86-32 and x86-64.
208 Contributed by Liubov Dmitrieva.
210 * Optimized strchr and strrchr for SSE on x86-32.
211 Contributed by Liubov Dmitrieva.
213 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
214 for x86-64 and x86-32.
215 Contributed by Liubov Dmitrieva.
217 * New interfaces: scandirat, scandirat64
218 Implemented by Ulrich Drepper.
220 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
221 Implemented by Ulrich Drepper.
223 * nscd now also caches the netgroup database.
224 Implemented by Ulrich Drepper.
226 * Integrate libm with gcc's -ffinite-math-only option.
227 Implemented by Ulrich Drepper.
229 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
230 to math functions. Implemented by Ulrich Drepper.
232 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
233 Implemented by Ulrich Drepper.
235 * New Linux interfaces: process_vm_readv, process_vm_writev
237 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
238 Implemented by Ulrich Drepper.
240 * Optimized nearbyint and strcasecmp for PPC.
241 Implemented by Adhemerval Zanella.
243 * New locales: bho_IN, unm_US, es_CU, ta_LK
247 * The following bugs are resolved with this release:
249 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
250 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
251 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
252 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
253 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
254 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
255 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
256 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
257 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
258 12795, 12811, 12813, 12814, 12841
260 * The RPC implementation in libc is obsoleted. Old programs keep working
261 but new programs cannot be linked with the routines in libc anymore.
262 Programs in need of RPC functionality must be linked against TI-RPC.
263 The TI-RPC implementation is IPv6 enabled and there are other benefits.
265 Visible changes of this change include (obviously) the inability to link
266 programs using RPC functions without referencing the TI-RPC library and the
267 removal of the RPC headers from the glibc headers.
268 Implemented by Ulrich Drepper.
270 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
271 syncfs, setns, sendmmsg
273 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
274 yue_HK, lij_IT, mhr_RU
276 * New encodings: CP770, CP771, CP772, CP773, CP774
278 * New program sotruss to trace calls through PLTs
279 Implemented by Ulrich Drepper.
281 * The malloc hook implementation is marked deprecated and will be removed
282 from the default implementation in the next version. The design never
283 worked ever since the introduction of threads. Even programs which do
284 not create threads themselves can use multiple threads created internally.
288 * The following bugs are resolved with this release:
290 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
291 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
292 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
293 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
296 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
298 * POWER7 optimizations: memset, memcmp, strncmp
300 * New optimized string functions for x86-64: strnlen (SSE2),
301 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
302 Implemented by Ulrich Drepper.
306 * The following bugs are resolved with this release:
308 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
309 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
310 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
311 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
312 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
313 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
314 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
315 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
317 * New interfaces: pthread_getname_np, pthread_setname_np
319 * New Linux interface: recvmmsg
321 * STT_GNU_IFUNC implemented for Sparc by David Miller.
323 * The dynamic linker now recognizes supported ABI versions from the
324 EI_ABIVERSION field in the ELF header.
325 Implemented by Ulrich Drepper.
327 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
328 will not be used to fill in password fields in the passwd.byname replies.
329 Instead it is used to synthesize the shadow.byname table, should it be
330 missing. This is a useful mode in some installations involving Solaris.
331 Implemented by Ulrich Drepper.
333 * New locales: kok_IN, sq_MK, cv_RU
337 * The following bugs are resolved with this release:
339 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
340 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
341 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
342 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
343 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
344 10789, 10817, 10823, 10840, 10847
346 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
348 Implemented by Ulrich Drepper.
350 * Checking version of longjmp added that fails if an uninitialized stack
351 frame would be created. Implemented by Ulrich Drepper.
353 * STT_GNU_IFUNC is now supported in static executables.
354 Implemented by H.J. Lu.
356 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
358 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
359 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
360 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
361 Contributed by H.J. Lu.
363 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
364 Implemented by Ulrich Drepper.
366 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
368 Contributed by H.J. Lu.
370 * Support for fma instruction in AVX on x86-64.
371 Implemented by H.J. Lu and Ulrich Drepper.
373 * AVX support in x86-64 auditing support in ld.so.
374 Implemented by H.J. Lu.
376 * STB_GNU_UNIQUE support added.
377 Implemented by Ulrich Drepper.
379 * Implement second fallback mode for optimized DNS lookup for even more
380 broken environments. If two requests from the same port are not
381 handled correctly close the socket and open a new one before sending
382 the second request. The 'single-request-reopen' option in /etc/resolv.conf
383 can be used to select this mode right away, instead of rediscovering the
384 necessity is every process again.
385 Implemented by Ulrich Drepper.
387 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
388 Implemented by Adam Tkac.
390 * Optimized iconv conversions for S390x.
391 Implemented by Andreas Krebbel.
393 * Using condvars with PI mutexes is now more efficient due to kernel
394 support for requeueing to PI futexes. NPTL support added for x86-64.
395 Implemented by Ulrich Drepper.
397 * New locales: ps_AF, my_MM
401 * The following bugs are resolved with this release:
403 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
404 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
405 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
406 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
407 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
409 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
410 Implemented by Ulrich Drepper.
412 * New Linux interfaces: accept4, fallocate, fallocate64.
413 Implemented by Ulrich Drepper.
415 * Correct declarations of string function when used in C++ code. This
416 could lead to compile errors for invalid C++ code.
418 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
421 * New POSIX 2008 interface: psiginfo
422 Implemented by Ulrich Drepper.
424 * New ISO C++1x interfaces: quick_exit, at_quick_exit
425 Implemented by Ulrich Drepper.
427 * Support for selecting between multiple function definitions at runtime
428 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
430 * The libcrypt library can now use the hash function implementations in
431 NSS. Implemented by Ulrich Drepper.
433 * The malloc implementation can be compiled to be less memory efficient
434 but higher performing in multi-threaded programs.
435 Implemented by Ulrich Drepper.
437 * New locales: nan_TW@latin, ks_IN
439 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
440 Implemented by Ulrich Drepper.
442 * Extended printf hook support. It is possible to use user-defined types
443 and extend existing format specifiers.
444 Implemented by Ulrich Drepper.
446 * Handling for group shadow files has been added.
447 Implemented by Ulrich Drepper.
449 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
450 servers (the case, e.g., for some people using the built-in DNS
451 server in ADSL modems/routers). There is a once-per-process timeout
452 in case of a broken server. To avoid it, users can run nscd or put
453 'options single-request' in /etc/resolv.conf.
454 Implemented by Ulrich Drepper.
458 * The following bugs are resolved with this release:
460 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
461 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
462 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
463 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
464 6968, 6974, 6980, 6995, 7008, 7009, 7029
466 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
467 up at the same time. Implemented by Ulrich Drepper.
469 * TLS descriptors for LD and GD on x86 and x86-64.
470 Implemented by Alexandre Oliva.
472 * getaddrinfo now handles DCCP and UDPlite.
473 Implemented by Ulrich Drepper.
475 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
476 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
477 Implemented by Ulrich Drepper.
479 * New implementation of memmem, strstr, and strcasestr which is O(n).
480 Implemented by Eric Blake.
482 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
484 * Implement "e" option for popen to open file descriptor with the
485 close-on-exec flag set. Implemented by Ulrich Drepper.
487 * Implement "b" mode for fmemopen. In this mode writes writes don't
488 implicitly add a NUL byte and seeks from the end of the buffer really
489 use the buffer end, not the string length as the basis.
490 Implemented by Ulrich Drepper.
492 * Many functions, exported and internal, now atomically set the close-on-exec
493 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
495 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
497 Implemented by Pravin Satpute.
499 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
503 * The following bugs are resolved with this release:
505 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
506 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
507 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
508 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
509 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
510 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
511 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
513 * New locales: bo_CN, bo_IN, shs_CA.
515 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
517 * Sorting rules for some Indian languages (Devanagari and Gujarati).
518 Implemented by Pravin Satpute.
520 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
522 * nscd caches now all timeouts for DNS entries
523 Implemented by Ulrich Drepper.
525 * nscd is more efficient and wakes up less often.
526 Implemented by Ulrich Drepper.
528 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
529 vdprintf, and obstack_vprintf.
530 Implemented by Jakub Jelinek.
532 * Faster memset for x86-64.
533 Implemented by Harsha Jagasia and H.J. Lu.
535 * Faster memcpy on x86.
536 Implemented by Ulrich Drepper.
538 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
539 Implemented by Ulrich Drepper.
541 * Faster sqrt and sqrtf implemention for some PPC variants.
542 Implemented by Steven Munroe.
546 * The following bugs are resolved with this release:
548 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
549 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
550 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
551 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
552 5071, 5103, 5104, 5112, 5113, 5184, 5186
554 * More checking functions: fread, fread_unlocked, open*, mq_open.
555 Implemented by Jakub Jelinek and Ulrich Drepper.
557 * Extend fortification to C++. Implemented by Jakub Jelinek.
559 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
560 by not recognizing 'a' as a modifier when those specs are requested.
561 Implemented by Jakub Jelinek.
563 * PPC optimizations to math and string functions.
564 Implemented by Steven Munroe.
566 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
567 options to be passed. Implemented by Ulrich Drepper.
569 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
571 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
572 Implemented by Ulrich Drepper.
574 * Handle private futexes in the NPTL implementation.
575 Implemented by Jakub Jelinek and Ulrich Drepper.
577 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
578 Implemented by Roland McGrath and Ulrich Drepper.
580 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
582 * SHA-256 and SHA-512 based password encryption.
583 Implemented by Ulrich Drepper.
585 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
586 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
589 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
590 Implemented by Ulrich Drepper.
594 * The following bugs are resolved with this release:
596 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
597 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
598 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
599 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
600 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
601 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
602 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
605 * New Linux interfaces: epoll_pwait, sched_getcpu.
607 * New generic interfaces: strerror_l.
609 * nscd can now cache the services database. Implemented by Ulrich Drepper.
613 * The following bugs are resolved with this release:
615 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
616 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
617 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
618 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
619 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
620 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
621 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
622 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
623 3225, 3251, 3252, 3253, 3273
625 * For Linux, the sorting of addresses returned by getaddrinfo now also
626 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
627 Implemented by Ulrich Drepper.
629 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
630 Implemented by Ulrich Drepper.
632 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
634 * New iconv module for MIK. Contributed by Alexander Shopov.
636 * For sites with broken group and/or passwd database, the auto-propagate
637 option of nscd can prevent creating ID lookup entries from the results
638 of a name lookup and vice versa. This usually is no problem but some
639 site might have problems with the default behavior.
640 Implemented by Ulrich Drepper.
642 * Iterating over entire database in NIS can be slow. With the
643 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
644 to trade time for memory. The entire database will be read at once.
645 Implemented by Ulrich Drepper.
647 * The interfaces introduced in RFC 3542 have been implemented by
650 * Support for the new ELF hash table format was added by Ulrich Drepper.
652 * Support for priority inheritance mutexes added by Jakub Jelinek and
655 * Support for priority protected mutexes added by Jakub Jelinek.
657 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
658 or_IN, csb_PL, fy_NL, sr_ME.
662 * More overflow detection functions.
664 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
665 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
667 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
668 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
669 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
670 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
671 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
672 by Masahide Washizawa.
674 * It is now possible to install audit libraries for the dynamic linker using
675 LD_AUDIT. Implemented by Ulrich Drepper.
677 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
678 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
679 For a libc and libpthread that works well on Linux 2.4 kernels, we
680 recommend using the stable 2.3 branch.
682 * The new function open_wmemstream acts like open_memstream,
683 but uses a wchar_t wide character buffer.
685 * The new function ppoll is an improved version of poll, similar to pselect.
687 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
688 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
689 renameat, unlinkat, linkat, symlinkat, readlinkat.
691 * New Linux kernel system calls: unshare,
692 inotify_init, inotify_add_watch, inotify_rm_watch.
694 * The euidaccess function is now also known by the alias eaccess,
695 for compatibility with some other systems.
697 * Timezone data updated to 2006b version.
701 * The following bugs are resolved with this release:
703 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
704 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
705 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
706 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
707 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
708 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
710 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
712 * As of this release, GCC 4 can be used to compile the C Library.
714 * Timezone data updated to 2005m version.
718 * The following bugs are resolved with this release:
720 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
721 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
722 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
723 777, 787, 821, 822, 823, 825
725 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
729 * Support for RFC 3678. Real implementations exist only for Linux so far.
730 Implemented by Ulrich Drepper.
732 * nscd can now cache entries persistently. Expiring entries are reloaded.
733 For speedups the cache can be shared in memory with client processes.
734 Implemented by Ulrich Drepper.
736 * nscd can now perform SELinux checks.
737 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
739 * getaddrinfo queries are now cached. Canonical name lookup is performed
741 Implemented by Ulrich Drepper.
743 * The nothrow function attribute is used when headers are used by gcc when
744 compiling C code. This can avoid significant amounts of exception
747 * The malloc functions perform more error checking and are stricter when
748 it comes to reacting on errors. The default action is to terminate
749 the process after showing an error message. Implemented by Ulrich Drepper.
751 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
752 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
754 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
755 namespaces using the new function dlmopen(). This feature is of course,
756 like most other dynamic loading functionality, not available in statically
757 linked applications. Implemented by Ulrich Drepper.
759 * Low-overhead boundary checking variants of string and some stdio functions
760 were added. These are to be used in conjunction with a gcc patch by
761 Jakub Jelinek which adds calls to these functions if possible.
762 Implemented by Jakub Jelinek and Ulrich Drepper.
764 * Old code for several operating systems and machine architectures that
765 have not been in working condition in a long time have been removed from
766 the main source tree maintained by the GNU C Library's maintainers.
767 These files are now reside in the separate `ports' source module
768 that is usable as an add-on when building the library.
772 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
773 interrogate the dynamic linker, compatible with the Solaris interface.
775 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
776 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
778 * getifaddrs now uses the netlink interface on Linux to get its information.
779 Implemented by Thorsten Kukuk.
781 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
782 Implemented by Ulrich Drepper.
784 * support for non-executable stacks on x86 has been added. Changes mostly
787 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
790 * getaddrinfo now performs destination address selection according to
795 * Thread-safe interfaces for many functions that access locale data
796 were added in version 2.3, but these features were omitted from NEWS.
797 Many functions have variants with an `_l' suffix that take a `locale_t'
798 object as a parameter rather than consulting the current locale.
799 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
800 create and maintain `locale_t' objects. Additionally, the new function
801 `uselocale' sets "the current locale" (as used by functions not so
802 parameterized) set for an individual thread. These features were added
803 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
805 * The functions getresuid, getresgid, setresuid, and setresgid, which
806 have long been available on Linux, are now declared in <unistd.h>
807 and are now also available on the Hurd.
809 * ELF thread-local storage support (TLS) now works on x86-64.
811 * The new dynamic string token $LIB is expanded in shared library names.
812 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
814 * Aldy Hernandez contributed complete software floating point support for
815 PowerPC machines with no FPU.
817 * fexecve is implemented on Linux.
819 * The `btowc' function should work at least twice as fast due to
820 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
822 * With approriate thread add-ons cancelable functions are now implemented
823 in libc.so as well. No need to call the function in libpthread. This
824 change allowed to finally disable the incorrect and expensive handling
825 of weak definition in ld.so.
827 * Yet more PLT entries in libc.so have been removed. We finally arrived
828 at the bare minimum. Startup times improved appropriately.
830 * Support for the new Linux/x86 system call interface was added. The
831 AT_SYSINFO auxiliary vector entry is recognized and handled.
835 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
838 * iconv (the program and the interface) now accepts empty names (excluding
839 options like //TRANSLIT) to mean "use charset of current locale".
841 * localedef can now transliterate characters in strings which are not in
842 the provided charmap. The information from the input locale is used.
844 * Prelinking support was added for ELF targets. This requires additional
845 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
847 * Read-only stdio streams now use mmap to speed up operation by eliminating
848 copying and buffer underflows. To use add 'm' to the mode string of
849 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
851 * The malloc functions were completely rewritten by Wolfram Gloger based
852 on Doug Lea's malloc-2.7.0.c.
854 * Isamu Hasegawa contributed a completely new and POSIX-conformant
855 implementation of regex.
857 * Bruno Haible upgraded the iconv and locale implementation to support
860 * Contents of the LC_* and LANG environment variables in the CEN style are
861 not recognized anymore. It never was used. Change by Ulrich Drepper.
863 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
864 thread-local storage (TLS) ABI on some platforms.
865 Changes by Ulrich Drepper. SH support by Kaz Kojima.
867 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
868 EUC-JISX0213, and TSCII.
870 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
871 BSD-compatible interface for getting all network interface addresses.
872 Implementation for IPv4 by Roland McGrath.
874 * Loading of locale data is faster due to the introduction of a locale
875 archive. Implemented by Roland McGrath and Ulrich Drepper.
877 * Startup times are significantly reduced by not using exported functions
878 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
881 * Steven Munroe contributed a port to PowerPC64/Linux.
885 * The Hurd now uses the GNU libio implementation of stdio rather than the
886 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
888 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
889 with the same behavior as the Linux system call of the same name.
893 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
894 128-bit long double format.
896 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
897 IBM1161, and IBM1162 charsets.
899 * Andreas Jaeger contributed a port to x86-64/Linux.
901 * Peter Bruin contributed a port to PowerPC/Hurd.
903 * libc functions using I/O streams now can handle wide-oriented streams
906 * optimizations in the dynamic linker. Binaries created by recent binutils
907 versions start up quicker due to reduced time spent on relocations.
909 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
913 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
914 asinh, atanh, j0 for the 128-bit long double format.
916 * Bruno Haible updated all the code handling Unicode in some form to
919 * Speed of regex for single-byte locales is back to previous levels.
920 Patch by Isamu Hasegawa.
922 * Alpha, SPARC, and IA-64 now also using floating stacks.
924 * Startup time of internationalized applications greatly improved through
925 iconv cache. Use iconvconfig to generate the cache file.
926 Contributed by Ulrich Drepper.
928 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
929 severe performance problems. Patch by David Mosberger.
931 * The Hurd port got a lot more functionality like AIO, various stdio
932 extensions, etc. Mainly done by Roland McGrath.
934 * mtrace can now lookup symbols in shared libraries.
938 * Intel's IA-64 math library is largely integrated. It provides fast and
939 accurate implementatations for most basic and standard math functions
940 in float, double, and long double format.
942 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
943 and asin for the 96-bit long double format and asin, log, tan for the
944 128-bit long double format.
946 * The beginning of a last-bit accurate math library by IBM Haifa were added.
947 The basic double functions exist today. Contributed by Abraham Ziv
948 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
949 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
951 * An asynchronous name lookup library was added. The interface is designed
952 after POSIX AIO. The proposal was circulated beforehand to get comments.
953 No negative ones came in. Implemented by Ulrich Drepper.
955 * Port to S390/64bit contributed by Martin Schwidefsky
956 <schwidefsky@de.ibm.com>.
958 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
959 of functions for Linux/IA-64.
961 * The RPC code is now thread safe. Threads can now use the same service
962 of different services at the same time. Patch by Eric Norum
963 <eric.norum@usask.ca> with some help by Ulrich Drepper.
965 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
966 family of functions for Linux/S390.
968 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
969 of functions for Linux/x86.
971 * Port to Linux/CRIS contributed by Axis Communications.
975 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
976 we can now check for namespace violations and missing declarations. The
977 result is that almost all headers are now Unix-compliant (as defined in
978 the upcoming XPG6). The negative side is that some programs might need
979 corrections, too, if they depend on the incorrect form of the headers in
980 previous versions which defined too many symbols and included too many
983 * regex now handles multibyte character sets correctly.
984 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
986 * iconv (the program) does now conform to the upcoming XPG6 and handles
987 charmaps. Instead of the charset names the path of charmaps can be
988 provided and the conversion happens based on this data.
989 Contributed by Ulrich Drepper.
991 * The locale program now provides detailed information about the installed
996 only lists the names of the supported locales
1000 provides details such as country, language, and codeset name.
1001 Contributed by Ulrich Drepper.
1005 * The gencat program now parses the input file according to the charset
1006 selected by the LC_CTYPE category. This is important for stateful
1007 character sets. To make generating catalogs easier there is a way
1008 to overwrite the charset selected by the locale: before the first
1009 message or $ quote line the catalog can contain a line like
1011 $ codeset=ISO-8859-2
1013 to select the charset (ISO-8859-2 in this case).
1015 Implemented by Shinya Hanataka and Ulrich Drepper.
1017 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1018 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1019 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1021 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1022 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1024 * The LANGUAGE environment variable is now ignored unless the locale is
1025 changed from the default "C" locale.
1027 * The usual bug fixes.
1031 * Greg McGary added runtime support for bounds checking using gcc's
1032 new -fbounded-pointers option. ix86 target is complete. PowerPC
1035 * Thorsten Kukuk added secure mode support to nscd.
1037 * The Berkeley db libraries have been removed.
1039 Related, the nss_db module is now in a separate package since it
1040 obviously requires a database library being available.
1042 * Wide character I/O streams implemented by Ulrich Drepper.
1044 * Functions from the extended socket API added by Ulrich Drepper.
1046 * Functions feenableexcept and fedisableexcept to control the
1047 behaviour of individual exceptions have been added by Andreas Jaeger.
1049 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1051 * The resolver code has been updated from bind 8.2.3-T5B which supports
1052 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1055 This change could in some situations effect backward compatibility. Since
1056 now `_res' is a thread-local instead of a global variable, modifying it
1057 in one thread does not have any effect in other threads.
1059 The resolver library was also extended to allow IPv6 as the transport
1060 protocol for the requests. This work was done by Stig Venaas.
1062 * Compatibility code for K&R C compilers has been removed from the
1063 header files. A ISO C compiler is needed to use the library
1064 (conforming to either C89 or C99 standard).
1066 * Complete rewrite of the localedef program to support multibyte character
1067 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1068 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1069 Implemented by Ulrich Drepper.
1071 Bruno Haible significantly improved the generation and use of the data
1072 structures for the wide character tables.
1074 * Plural handling in gettext implemented by Ulrich Drepper.
1076 * The utmp daemon has been removed.
1078 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1080 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1083 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1085 * POSIX barriers implemented by Kaz Kylheku.
1087 * POSIX spawn function family implemented by Ulrich Drepper.
1089 * POSIX spinlocks are now available.
1091 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1093 * the configure option --enable-kernel=X.Y.Z allows to strip out
1094 compatibility for kernel versions before X.Y.Z. This is currently only
1095 implemented for Linux.
1097 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1098 field sin6_scope_id. This means that all programs using IPv6 should be
1099 recompiled. Don't expect binary compatibility with previous glibc
1102 * various conversion modules for IBM character sets contributed by
1105 * IA-64 port by Jes Sorensen and HJ Lu.
1119 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1121 * New xdr functions are added; some rpc functions are now 64bit clean.
1123 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1125 * Fixed known incompatibilities with glibc 2.0.
1127 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1129 * Optimized a number of functions (especially the ELF dynamic loader).
1131 * Update timezone data files.
1133 * lots of charmaps corrections
1135 * some new locale definitions and charmaps
1140 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1141 conform to POSIX member type requirements. Symbol versions have been
1142 adjusted as needed within the library, and for direct use by applications,
1143 but there is potential for problems if third-party libraries use
1144 struct timeval as part of their interface. This does not present
1145 a problem for X and other "essential" system libraries.
1147 * An additional locale model to support C++ Standard Library locale
1148 model and probably more was implemented by Ulrich Drepper.
1150 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1153 * Miles Bader provided the `argp' function family to support hierachical
1154 command line argument parsing, layered on top of getopt.
1156 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1158 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1161 * scanf recognizes the %a and %A format for scanning floating point numbers.
1163 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1164 information and interfaces for the available integer types.
1166 * about 130 new math functions were added to implement the ISO C9x math
1169 * the new header <complex.h> contains definitions of the complex math
1170 functions from ISO C 9X.
1172 * the new header <tgmath.h> defines generic macros to use complex or
1173 real valued functions.
1175 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1177 * Andreas Jaeger provided a test suite for the math library.
1179 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1181 * Ulrich Drepper added character set conversion functions (iconv).
1183 * Optimized string functions have been added.
1185 * The localedata addon is now part of glibc.
1187 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1189 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1190 daemon for NSS (nscd).
1192 Missing a better place here are some numbers on improvements. Under
1193 Linux 2.1.125 un-tar-ing the kernel sources takes
1197 using local files 12.19s 6.88s 22.91s
1199 using NIS 13.92s 8.91s 26.34s
1201 using NIS & nscd 10.37s 7.34s 25.30s
1203 using NIS+ 27.57s 30.37s 640.46s
1205 using NIS+ & nscd 10.25s 7.83s 26.51s
1207 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1209 Keep in mind that non-namelookup related operations dominate above times.
1210 It was just a common complain that using NIS+ unpacking the kernel is
1213 [1] The old nscd implementation is not available anymore since it was
1214 distributed with glibc up to version 2.0.98 and thus is now replaced.
1216 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1218 * Mark Kettenis provided a Hesiod NSS module.
1220 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1221 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1223 * rcmd can now handle netgroups (Dick Streefland).
1225 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1228 * Support for the IPv6 protocol has been added to the socket API, as per the
1229 latest draft standards.
1231 * Support for Linux 2.2 has been added.
1233 * Interface changes relative to the latest 2.0.x release:
1234 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1235 addseverity NEW: Unix98
1236 alphasort64 NEW: LFS
1237 argp_err_exit_status NEW: argp, GNU ext
1238 argp_error NEW: argp, GNU ext
1239 argp_failure NEW: argp, GNU ext
1240 argp_help NEW: argp, GNU ext
1241 argp_parse NEW: argp, GNU ext
1242 argp_program_bug_address NEW: argp, GNU ext
1243 argp_program_version NEW: argp, GNU ext
1244 argp_program_version_hook NEW: argp, GNU ext
1245 argp_state_help NEW: argp, GNU ext
1246 argp_usage NEW: argp, GNU ext
1247 authdes_create NEW: Secure RPC
1248 authdes_getucred NEW: Secure RPC
1249 authdes_pk_create NEW: Secure RPC
1250 backtrace NEW: GNU ext.
1251 backtrace_symbols NEW: GNU ext.
1252 backtrace_symbols_fd NEW: GNU ext.
1254 cacosf NEW: ISO C 9x
1255 cacosh NEW: ISO C 9x
1256 cacoshf NEW: ISO C 9x
1257 cacoshl NEW: ISO C 9x
1258 cacosl NEW: ISO C 9x
1265 casinf NEW: ISO C 9x
1266 casinh NEW: ISO C 9x
1267 casinhf NEW: ISO C 9x
1268 casinhl NEW: ISO C 9x
1269 casinl NEW: ISO C 9x
1271 catanf NEW: ISO C 9x
1272 catanh NEW: ISO C 9x
1273 catanhf NEW: ISO C 9x
1274 catanhl NEW: ISO C 9x
1275 catanl NEW: ISO C 9x
1276 cbc_crypt NEW: Secure RPC
1280 ccoshf NEW: ISO C 9x
1281 ccoshl NEW: ISO C 9x
1287 cimagf NEW: ISO C 9x
1288 cimagl NEW: ISO C 9x
1289 clearerr_locked REMOVED
1290 clntunix_create NEW: sunrpc ext
1292 clog10 NEW: ISO C 9x
1293 clog10f NEW: ISO C 9x
1294 clog10l NEW: ISO C 9x
1304 cprojf NEW: ISO C 9x
1305 cprojl NEW: ISO C 9x
1307 crealf NEW: ISO C 9x
1308 creall NEW: ISO C 9x
1313 csinhf NEW: ISO C 9x
1314 csinhl NEW: ISO C 9x
1317 csqrtf NEW: ISO C 9x
1318 csqrtl NEW: ISO C 9x
1322 ctanhf NEW: ISO C 9x
1323 ctanhl NEW: ISO C 9x
1325 des_setparity NEW: Secure RPC
1326 ecb_crypt NEW: Secure RPC
1327 endutxent NEW: Unix98
1329 exp10f NEW: ISO C 9x
1330 exp10l NEW: ISO C 9x
1334 fattach NEW: STREAMS
1335 fdetach NEW: STREAMS
1339 feclearexcept NEW: ISO C 9x
1340 fegetenv NEW: ISO C 9x
1341 fegetexceptflag NEW: ISO C 9x
1342 fegetround NEW: ISO C 9x
1343 feholdexcept NEW: ISO C 9x
1345 feraiseexcept NEW: ISO C 9x
1346 ferror_locked REMOVED
1347 fesetenv NEW: ISO C 9x
1348 fesetexceptflag NEW: ISO C 9x
1349 fesetround NEW: ISO C 9x
1350 fetestexcept NEW: ISO C 9x
1351 feupdateenv NEW: ISO C 9x
1352 fflush_locked REMOVED
1356 fgets_unlocked NEW: GNU ext.
1357 fileno_locked REMOVED
1369 fputc_locked REMOVED
1370 fputs_unlocked NEW: GNU ext.
1371 fread_unlocked NEW: GNU ext.
1376 fstatvfs NEW: Unix98
1380 ftruncate64 NEW: LFS
1382 fwrite_unlocked NEW: GNU ext.
1383 gai_strerror NEW: IPv6
1387 getchar_locked REMOVED
1389 getdate_err NEW: Unix98
1390 getdate_r NEW: GNU ext.
1392 getnameinfo NEW: IPv6
1393 getnetname NEW: Secure RPC
1394 getpmsg NEW: STREAMS
1395 getpt NEW: Unix98 PTY
1396 getrlimit64 NEW: LFS
1397 getutxent NEW: Unix98
1398 getutxid NEW: Unix98
1399 getutxline NEW: Unix98
1400 glob64 NEW: GNU ext.
1401 globfree64 NEW: GNU ext.
1402 gnu_get_libc_release NEW: GNU ext.
1403 gnu_get_libc_version NEW: GNU ext.
1404 grantpt NEW: Unix98 PTY
1405 host2netname NEW: Secure RPC
1407 iconv_close NEW: iconv
1408 iconv_open NEW: iconv
1409 if_freenameindex NEW: IPv6
1410 if_indextoname NEW: IPv6
1411 if_nameindex NEW: IPv6
1412 if_nametoindex NEW: IPv6
1413 in6addr_any NEW: IPv6
1414 in6addr_loopback NEW: IPv6
1415 inet6_isipv4mapped NEW: IPv6
1416 isastream NEW: STREAMS
1417 iswblank NEW: GNU ext.
1418 key_decryptsession NEW: Secure RPC
1419 key_decryptsession_pk NEW: Secure RPC
1420 key_encryptsession NEW: Secure RPC
1421 key_encryptsession_pk NEW: Secure RPC
1422 key_gendes NEW: Secure RPC
1423 key_get_conv NEW: Secure RPC
1424 key_secretkey_is_set NEW: Secure RPC
1425 key_setnet NEW: Secure RPC
1426 key_setsecret NEW: Secure RPC
1427 llrint NEW: ISO C 9x
1428 llrintf NEW: ISO C 9x
1429 llrintl NEW: ISO C 9x
1430 llround NEW: ISO C 9x
1431 llroundf NEW: ISO C 9x
1432 llroundl NEW: ISO C 9x
1437 lrintf NEW: ISO C 9x
1438 lrintl NEW: ISO C 9x
1439 lround NEW: ISO C 9x
1440 lroundf NEW: ISO C 9x
1441 lroundl NEW: ISO C 9x
1443 makecontext NEW: Unix98
1444 mempcpy NEW: GNU ext.
1447 modify_ldt NEW: kernel
1451 nearbyint NEW: ISO C 9x
1452 nearbyintf NEW: ISO C 9x
1453 nearbyintl NEW: ISO C 9x
1454 netname2host NEW: Secure RPC
1455 netname2user NEW: Secure RPC
1456 nexttoward NEW: ISO C 9x
1457 nexttowardf NEW: ISO C 9x
1458 nexttowardl NEW: ISO C 9x
1462 passwd2des NEW: Secure RPC
1464 pow10f NEW: GNU ext.
1465 pow10l NEW: GNU ext.
1468 printf_size NEW: GNU ext.
1469 printf_size_info NEW: GNU ext.
1470 profil_counter REMOVED
1471 pthread_mutexattr_getkind_np REPLACED
1472 pthread_mutexattr_setkind_np REPLACED
1473 ptsname NEW: Unix98 PTY
1474 ptsname_r NEW: Unix98 PTY
1476 putchar_locked REMOVED
1477 putgrent NEW: GNU ext.
1479 putpmsg NEW: STREAMS
1480 pututxline NEW: Unix98
1484 readdir64_r NEW: LFS
1485 remquo NEW: ISO C 9x
1486 remquof NEW: ISO C 9x
1487 remquol NEW: ISO C 9x
1489 roundf NEW: ISO C 9x
1490 roundl NEW: ISO C 9x
1492 scalbln NEW: ISO C 9x
1493 scalblnf NEW: ISO C 9x
1494 scalblnl NEW: ISO C 9x
1496 sendfile NEW: kernel
1497 setcontext NEW: Unix98
1498 setrlimit64 NEW: LFS
1499 setutxent NEW: Unix98
1501 sigignore NEW: Unix98
1502 sigqueue NEW: POSIX.1b
1503 sigrelse NEW: Unix98
1504 sigset NEW: POSIX.1b
1505 sigtimedwait NEW: POSIX.1b
1506 sigwaitinfo NEW: POSIX.1b
1507 sincos NEW: GNU ext.
1508 sincosf NEW: GNU ext.
1509 sincosl NEW: GNU ext.
1513 strcasestr NEW: GNU ext.
1514 strtoimax NEW: ISO C 9x
1515 strtoumax NEW: ISO C 9x
1516 strverscmp NEW: GNU ext.
1517 svcauthdes_stats NEW: Secure RPC
1518 svcunix_create NEW: sunrpc etx
1519 svcunixfd_create NEW: sunrpc ext
1520 swapcontext NEW: Unix98
1521 tcgetsid NEW: Unix98 PTY
1522 tdestroy NEW: GNU ext.
1523 tgamma NEW: ISO C 9x
1524 tgammaf NEW: ISO C 9x
1525 tgammal NEW: ISO C 9x
1529 truncf NEW: ISO C 9x
1530 truncl NEW: ISO C 9x
1532 unlockpt NEW: Unix98 PTY
1533 updwtmpx NEW: Unix98
1534 user2netname NEW: Secure RPC
1535 utmpxname NEW: Unix98
1536 versionsort NEW: GNU ext.
1537 versionsort64 NEW: GNU ext.
1539 wcscasecmp NEW: GNU ext.
1540 wcsncasecmp NEW: GNU ext.
1541 wcsnlen NEW: GNU ext.
1542 wcstoimax NEW: ISO C 9x
1543 wcstoll NEW: ISO C 9x
1544 wcstoull NEW: ISO C 9x
1545 wcstoumax NEW: ISO C 9x
1547 wordexp NEW: POSIX.2
1548 wordfree NEW: POSIX.2
1549 write_profiling REMOVED
1550 xdecrypt NEW: Secure RPC
1551 xdr_authdes_cred NEW: Secure RPC
1552 xdr_authdes_verf NEW: Secure RPC
1553 xdr_cryptkeyarg NEW: Secure RPC
1554 xdr_cryptkeyarg2 NEW: Secure RPC
1555 xdr_cryptkeyres NEW: Secure RPC
1556 xdr_getcredres NEW: Secure RPC
1557 xdr_key_netstarg NEW: Secure RPC
1558 xdr_key_netstres NEW: Secure RPC
1559 xdr_keybuf NEW: Secure RPC
1560 xdr_keystatus NEW: Secure RPC
1561 xdr_netnamestr NEW: Secure RPC
1562 xdr_sizeof NEW: Secure RPC
1563 xdr_unixcred NEW: sunrpc ext
1564 xencrypt NEW: Secure RPC
1565 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1576 * inet_ntoa is thread-safe
1578 * updwtmp is moved from libutil to libc
1580 * rewrite of cbrt function
1582 * update of timezone data
1596 * add atoll function
1598 * fix complex problems in Berkeley DB code
1600 * fix math functions
1604 * fixed lots of header problems (especially Linux/GNU specific)
1606 * dynamic loader preserves all registers
1608 * Roland McGrath provided support for handling of auxiliary objects in
1609 the ELF dynamic loader.
1611 * support for parallel builds is improved
1615 * GNU extensions are no longer declared by default. To enable them you
1616 must define the macro `_GNU_SOURCE' in your program or compile with
1619 * The library has changed from using GNU ld symbol aliases to using weak
1620 symbols where available. The ELF object file format supports weak
1621 symbols; GNU ld also supports weak symbols in the a.out format. (There
1622 is also now support for other GNU ld extensions in ELF. Use the
1623 `--with-elf' option to configure to indicate you have ELF, and
1624 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1625 of many files which contained only symbol aliases, reducing the size of
1626 the source and the compiled library; many other files were renamed to
1627 less cryptic names previously occupied by the symbol alias files.
1628 There is a new header file <elf.h> for programs which operate on
1629 files in the ELF format.
1631 * Converted to Autoconf version 2, so `configure' has more options.
1632 Run `configure --help' to see the details.
1634 * The library can now be configured to build profiling, highly-optimized
1635 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1636 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1637 `configure' enable building these extra libraries. The shared library is
1638 built by default when using both ELF and GNU ld. When shared libraries
1639 are enabled, the new library `-ldl' is available for arbitrary run-time
1640 loading of shared objects; its interface is defined in <dlfcn.h>. The
1641 new header file <link.h> gives access to the internals of the run-time
1642 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1643 application of same name on other systems and it provides information
1644 about dynamically linked binaries.
1646 * The C library now provides the run-time support code for profiling
1647 executables compiled with `-pg'. Programs can control the profiling code
1648 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1649 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1650 the support for this file format was contributed by David Mosberger-Tang.
1652 * The math code has been replaced with a math library based on fdlibm from
1653 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1654 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1655 functions. The math functions now reside in a separate library, so
1656 programs using them will need to use `-lm' their linking commands.
1658 * John C. Bowman contributed optimized ix87 assembler inline functions.
1660 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1661 mechanism similar to that found in Solaris 2. This is now used for the
1662 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1663 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1664 file controls what services are used for each individual database. This
1665 works by loading shared libraries with names specified in `nsswitch.conf',
1666 so service modules can be changed or added at any time without even
1667 relinking any program. Currently there are the file, db, and NIS based
1668 NSS services available.
1670 * The new functions `strtoq' and `strtouq' parse integer values from
1671 strings, like `strtol' and `strtoul', but they return `long long int' and
1672 `unsigned long long int' values, respectively (64-bit quantities).
1674 * The new functions `strtof' and `strtold' parse floating-point values from
1675 strings, like `strtod', but they return `float' and `long double' values,
1676 respectively (on some machines `double' and `long double' are the same).
1678 * Ulrich Drepper has contributed new implementations of the floating-point
1679 printing and reading code used in the `printf' family of functions and
1680 `strtod', `strtof', and `strtold'. These new functions are perfectly
1681 accurate, and much faster than the old ones.
1683 * The implementation of the POSIX locale model was completely rewritten by
1684 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1685 to compile the POSIX locale definition.
1687 * The former dummy implementations of the strcoll and strxfrm function are
1688 now replaced by fully functional code contributed by Ulrich Drepper. The
1689 collation information comes from the POSIX locale definitions.
1691 * The new header <langinfo.h> defines an interface for accessing
1692 various locale-dependent data (using the locale chosen with `setlocale').
1694 * Ulrich Drepper has contributed a new suite of functions for operation on
1695 wide-character and multibyte-character strings, in <wchar.h>;
1696 and classification and case conversion of wide characters, in <wctype.h>.
1697 These new functions are conforming to the ISO C, Amendement 1 specification.
1699 * There is now a second implementation of the standard I/O library available.
1700 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1701 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1703 * You can now use positional parameter specifications in format strings
1704 for the `printf' and `scanf' families of functions. For example,
1705 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1706 ``Number 6, Mr Jones''. This is mainly useful when providing different
1707 format strings for different languages, whose grammars may dictate
1708 different orderings of the values being printed. To support this
1709 feature, the interface for `register_printf_handler' has changed; see
1710 the header file <printf.h> for details.
1712 * The `printf' and `scanf' families of functions now understand a new
1713 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1714 to group numbers as indicated by the locale; for `scanf' and friends, this
1715 says to accept as valid only a number with all the proper grouping
1716 separators in the right places. In the default "C" locale, numbers are
1717 not grouped; but locales for specific countries will define the usual
1718 conventions (i.e. separate thousands with `,' in the US locale).
1720 * The pgrp functions have been regularized, slightly incompatibly but much
1721 less confusingly. The core functions are now `getpgid' and `setpgid',
1722 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1723 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1724 provided for compatibility. There is no longer an incompatible `getpgrp'
1725 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1727 * The new header file <fts.h> and suite of functions simplify programs that
1728 operate on directory trees. This code comes from 4.4 BSD.
1730 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1731 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1732 NSS scheme used in glibc.
1734 * There is a new malloc debugging hook `__memalign_hook'.
1736 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1737 `unsigned int' in <sys/types.h>. These are for compatibility only and
1738 their use is discouraged.
1740 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1741 done differently, so that it works even without GNU ld.
1743 * New function `euidaccess' checks allowed access to a file like `access',
1744 but using the effective IDs instead of the real IDs.
1746 * The time zone data files have been updated for the latest and greatest
1747 local time conventions of the countries of the world.
1749 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1752 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1753 for formatting floating-point numbers. They are provided only for
1754 compatibility; new programs should use `sprintf' instead. There are
1755 also equivalent function for the `long double' floating-point type and
1756 all functions also exist in a reentrant form.
1758 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1759 functions for maintaining the login-record files (primarily of use to
1760 system programs such as `login'), and convenient functions for
1761 allocating and initializing a pseudo-terminal (pty) device.
1763 * Ulrich Drepper has contributed new support for System V style
1764 shared memory and IPC on systems that support it.
1766 * Ulrich Drepper has contributed several miscellaneous new functions found
1767 in System V: The `hsearch' family of functions provide an effective
1768 implementation of hash tables; `a64l' and `l64a' provide a very simple
1769 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1772 * Ulrich Drepper has contributed new reentrant counterparts for the
1773 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1775 * Ulrich Drepper has contributed new, highly-optimized versions of several
1776 string functions for the i486/Pentium family of processors.
1778 * Ulrich Drepper has updated the Linux-specific code, based largely
1779 on work done in Hongjiu Lu's version of GNU libc for Linux.
1780 The GNU library now supports Linux versions 2.0.10 and later,
1781 using the ELF object file format (i[3456]86-*-linux).
1783 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1785 * David Mosberger-Tang and Richard Henderson have ported the C library
1786 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1787 dynamic linking support for ELF/Alpha.
1789 * Richard Henderson contributed several Alpha optimized assembler function
1790 for arithmetic and string handling.
1792 * Ulrich Drepper has contributed a new set of message catalog functions to
1793 support multiple languages using the <libintl.h> interface, for use with
1794 his new package GNU gettext. Translation volunteers have contributed
1795 catalogs of the library's messages in Spanish, German, and Korean.
1797 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1798 program and the `catgets' function for reading the catalog files it
1799 creates. (The <libintl.h> interface is preferred; we include the
1800 <nl_types.h> interface using `catgets' only for source compatibility with
1801 programs already written to use it.)
1803 * New header file <values.h> gives SVID-compatible names for <limits.h>
1806 * Various new macros, declarations, and small header files for compatibility
1809 * New function `group_member' is a convenient way to check if a process has
1810 a given effective group ID.
1812 * When using GCC 2.7 and later, the socket functions are now declared in a
1813 special way so that passing an argument of type `struct sockaddr_in *',
1814 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1815 `struct sockaddr *' type, does not generate a type-clash warning.
1817 * New function `error' declared in header file <error.h> is a convenient
1818 function for printing error messages and optionally exiting; this is the
1819 canonical function used in GNU programs. The new functions `err', `warn',
1820 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1821 doing the same thing.
1823 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1824 POSIX.2 `glob' function to do ~ and {...} expansion.
1826 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1827 `clearenv' which is used in POSIX.9 is also available.
1829 * New function `getsid' returns session ID number on systems that support it.
1831 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1832 files <db.h> and <mpool.h> provide a rich set of functions for several
1833 types of simple databases stored in memory and in files, and <ndbm.h> is
1834 an old `ndbm'-compatible interface using the `db' functions. Link with
1835 `-ldb' to get these functions.
1837 * New macro `strdupa' copies a string like `strdup', but uses local stack
1838 space from `alloca' instead of dynamic heap space from `malloc'.
1840 * New function `strnlen' is like `strlen' but searches only a given maximum
1841 number of characters for the null terminator. `stpncpy', `strndup' and
1842 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1845 * New function `statfs' in header <sys/statfs.h>.
1847 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1848 provide convenient functions for operating on blocks of null-terminated
1851 * A new suite of functions in <utmp.h> handle all the details of reading
1852 and writing the utmp file.
1854 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1857 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1858 completely POSIX compliant and also implemented the extended functionality
1859 to handle alternate digit representation and alternate era date formats.
1861 * Ulrich Drepper provided an implementation of the `strptime' function
1862 defined in XPG4.2 which transforms a string into a `struct tm' value.
1864 * Paul Eggert provided the tzselect shell script as part of the timezone
1865 code. The shell script makes it easy to select the correct timezone
1868 * The implementation of the malloc family of functions is completely replaced
1869 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1870 The implementation uses the mmap function (if available) and it is
1871 optimized for the use in multi threaded programs.
1873 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1874 functions. This new functionality is usable by specifying a special
1875 salt string and it is compatible with implementation on *BSD systems.
1877 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1878 `getsubopt' to handle second level command line options, `bsd_signal'
1879 to access BSD style `signal' functionality, the obsolete `regexp' style
1882 * the `lchown' function is available on system which support this
1885 * The implementation of the shadow password handling function was contributed
1888 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1890 * POSIX.1g support was added. The <sys/select.h> header is available,
1891 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1892 implementation of `getaddrinfo'.
1896 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1898 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1899 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1901 * The new function `daemon' from 4.4 BSD is useful for server programs that
1902 want to put themselves in the background.
1904 * Joel Sherrill has contributed support for several standalone boards that
1905 run without an operating system.
1907 * `printf', `scanf' and friends now accept a `q' type modifier for long
1908 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1910 * All of the code taken from BSD (notably most of the math and networking
1911 routines) has been updated from the BSD 4.4-Lite release.
1913 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1915 * The new functions `getdomainname' and `setdomainname' fetch or change the
1916 YP/NIS domain name. These are system calls which exist on systems which
1919 * The time zone data files have been updated for the latest international
1922 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1923 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1927 * The C library now includes support for Sun RPC, from Sun's free
1928 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1929 are included. (There is still no support for YP.)
1931 * Tom Quinn has contributed a port of the C library to SGI machines running
1932 Irix 4 (mips-sgi-irix4).
1934 * The new `lockf' function is a simplified interface to the locking
1935 facilities of `fcntl', included for compatibility.
1937 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1939 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1941 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1944 * The error message printed by `assert' for a failed assertion now includes
1945 the name of the program (if using GNU ld) and the name of the calling
1946 function (with versions of GCC that support this).
1948 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1950 * The library now includes the <sys/mman.h> header file and memory
1951 management functions `mmap', `munmap', `mprotect', `msync', and
1952 `madvise', on systems that support those facilities.
1954 * The interface for `mcheck' has changed slightly: the function called to
1955 abort the program when an allocation inconsistency is detected now takes
1956 an argument that indicates the type of failure. The new function
1957 `mprobe' lets you request a consistency check for a particular block at
1958 any time (checks are normally done only when you call `free' or `realloc'
1961 * It is now possible to easily cross-compile the C library, building on one
1962 system a library to run on another machine and/or operating system. All
1963 you need to do is set the variable `HOST_CC' in `configparms' to the
1964 native compiler for programs to run on the machine you are building on (a
1965 few generator programs are used on Unix systems); set `CC' to the
1968 * The new function `fexecve' (only implemented on the GNU system) executes
1969 a program file given a file descriptor already open on the file.
1973 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1974 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1976 * You can set the variable `libprefix' in `configparms' to specify a prefix
1977 to be prepended to installed library files; this makes it easy to install
1978 the GNU C library to be linked as `-lgnuc' or whatever.
1980 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1981 copies a limited number of characters from a string, and returns the
1982 address of the last character written.
1984 * You no longer need to check for whether the installed `stddef.h' is
1985 compatible with the GNU C library. configure now checks for you.
1987 * You can now define a per-stream `fileno' function to convert the
1988 stream's cookie into an integral file descriptor.
1990 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1991 allocates zero bytes of storage, and returns a unique pointer which
1992 you can pass to `realloc' or `free'. The behavior is undefined if
1993 you dereference this pointer.
1995 * The C library now runs on Sony NEWS m68k machines running either
1996 NewsOS 3 or NewsOS 4.
1998 * The new `syscall' function is a system-dependent primitive function
1999 for invoking system calls. It has the canonical behavior on Unix
2000 systems, including unreliable return values for some calls (such as
2001 `pipe', `fork' and `getppid').
2003 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2004 to `EAGAIN', which is the preferred name. On systems whose kernels
2005 use two distinct codes, the C library now translates EWOULDBLOCK to
2006 EAGAIN in every system call function.
2010 * The GNU C Library Reference Manual is now distributed with the library.
2011 `make dvi' will produce a DVI file of the printed manual.
2012 `make info' will produce Info files that you can read on line using C-h i
2013 in Emacs or the `info' program.
2014 Please send comments on the manual to bug-glibc-manual@gnu.org.
2016 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2018 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2020 * Jason Merrill has contributed a port to the Sequent Symmetry running
2021 Dynix version 3 (i386-sequent-dynix).
2023 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2024 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2026 * New function `memory_warnings' lets you arrange to get warnings when
2027 malloc is running out of memory to allocate, like Emacs gives you.
2029 * The C library now contains the relocating allocator used in Emacs 19 for
2030 its editing buffers. This allocator (ralloc) minimizes allocation
2031 overhead and fragmentation by moving allocated regions around whenever it
2032 needs to. You always refer to a ralloc'd region with a "handle" (a
2033 pointer to a pointer--an object of type `void **').
2035 * There is a new `printf' format: `%m' gives you the string corresponding
2036 to the error code in `errno'.
2038 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2039 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2040 pass, the `a' modifier says to fill in a `char **' you pass with a
2043 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2044 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2045 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2047 * `mkstemp' is a traditional Unix function to atomically create and open a
2048 uniquely-named temporary file.
2052 * The standard location for the file that says what the local timezone is
2053 has changed again. It is now `/usr/local/etc/localtime' (or more
2054 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2056 * The distribution no longer contains any files with names longer than 14
2059 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2060 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2062 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2066 * The configuration process has changed quite a bit. The `configure'
2067 script is now used just like the configuration scripts for other GNU
2068 packages. The `sysdeps' directory hierarchy is much rearranged.
2069 The file `INSTALL' explains the new scheme in detail.
2071 * The header files no longer need to be processed into ANSI C and
2072 traditional C versions. There is just one set of files to install, and
2073 it will work with ANSI or old C compilers (including `gcc -traditional').
2075 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2076 MIPS DECStation running Ultrix 4.
2078 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2079 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2080 made itself into a shared library.
2082 * Yet further improved support for the i386, running 4.3 BSD-like systems
2083 (such as Mach 3 with the Unix single-server), or System V.
2085 * New function `strncasecmp' to do case-insensitive string comparison
2086 with limited length.
2088 * New function `strsep' is a reentrant alternative to `strtok'.
2090 * New functions `scandir' and `alphasort' for searching directories.
2092 * New function `setenv' is a better interface to `putenv'.
2094 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2095 function for traversing a directory tree.
2097 * The GNU obstack package is now also part of the C library.
2098 The new function `open_obstack_stream' creates a stdio stream that
2099 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2100 formatted output directly to an obstack.
2102 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2103 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2105 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2107 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2108 things to your strings.
2110 * There are some new test programs: test-fseek, testmb, and testrand.
2112 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2113 These ports are not finished, but are a good starting place for really
2114 supporting those systems.
2116 * `/etc/localtime' is now the standard location for the file that says what
2117 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2118 This follows the general principle that `/etc' is the place for all local
2119 configuration files.
2121 * The C library header files now use `extern "C"' when used by the C++
2122 compiler, so the C library should now work with C++ code.
2124 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2125 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2128 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2129 function which uses the `merge sort' algorithm, and is said to be
2130 significantly faster than the old GNU `qsort' function. Merge sort is
2131 now the standard `qsort' function. The new algorithm can require a lot
2132 of temporary storage; so, the old sorting function is called when the
2133 required storage is not available.
2135 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2136 provides the Unix `crypt' function, plus some other entry points.
2138 * The code and header files taken from 4.4 BSD have been updated with the
2139 latest files released from Berkeley.
2141 ----------------------------------------------------------------------
2142 Copyright information:
2144 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2146 Permission is granted to anyone to make or distribute verbatim copies
2147 of this document as received, in any medium, provided that the
2148 copyright notice and this permission notice are preserved,
2149 thus giving the recipient permission to redistribute in turn.
2151 Permission is granted to distribute modified versions
2152 of this document, or of portions of it,
2153 under the above conditions, provided also that they
2154 carry prominent notices stating who last changed them.
2157 version-control: never
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