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 3479, 6778, 6808, 9685, 11607, 13717, 13696, 13939, 14042, 14090, 14166,
13 14150, 14151, 14154, 14157, 14166, 14173, 14195, 14252, 14283, 14298,
14 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14459, 14505,
17 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
18 Optimized versions of memcpy, memset, and memcmp added for System z10 and
20 Implemented by Andreas Krebbel.
22 * The new function secure_getenv allows secure access to the environment,
23 returning NULL if running in a SUID/SGID process. This function replaces
24 the internal function __secure_getenv.
26 * SystemTap static probes have been added into the dynamic linker.
27 Implemented by Gary Benson.
29 * Optimizations of string functions strstr, strcasestr and memmem.
30 Implemented by Maxim Kuvyrkov.
32 * The minimum Linux kernel version that this version of the GNU C Library
33 can be used with is 2.6.16.
35 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
36 powerpc POWER7. Implemented by Will Schmidt.
38 * New configure option --disable-nscd builds the C library such that it
39 never attempts to contact the Name Service Caching Daemon (nscd).
40 New configure option --disable-build-nscd avoids building nscd itself;
41 this is the default if --disable-nscd is used.
46 * The following bugs are resolved with this release:
48 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
49 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
50 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
51 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
52 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
53 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
54 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
55 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
56 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
57 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
58 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
59 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
60 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
61 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
62 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
63 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
64 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
65 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
66 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
67 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
68 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
69 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
72 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
73 configuring glibc with:
74 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
75 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
76 Implemented by H.J. Lu.
80 + define static_assert
84 + declare at_quick_exit and quick_exit also for ISO C11
86 + aligned_alloc. NB: The code is deliberately allows the size parameter
87 to not be a multiple of the alignment. This is a moronic requirement
88 in the standard but it is only a requirement on the caller, not the
93 + uchar.h support added
95 + CMPLX, CMPLXF, CMPLXL added
97 Implemented by Ulrich Drepper.
99 * Support for the IA-64 has been moved to ports.
101 * Remove support for anything but ELF binary format
103 * Checking versions of poll, ppoll added.
104 Implemented by Ulrich Drepper.
106 * More generic and 64-bit performance optimizations to math functions.
107 Implemented by Ulrich Drepper.
109 * New configure option --enable-obsolete-rpc makes the deprecated RPC
110 headers and functions available at compile time as they were before
111 version 2.14. This option will be removed at some time in the future
112 after the TI-RPC library becomes fully sufficient for the needs of
113 existing applications.
115 * Compatibility code for Linux kernel versions before 2.4 has been removed.
116 Note that glibc is not expected to work with any Linux kernel version
119 * New header <sys/auxv.h> and function getauxval allowing easy access to
120 the AT_* key-value pairs passed from the Linux kernel. The header also
121 defines the HWCAP_* bits associated with the AT_HWCAP key.
123 * New locales: mag_IN
125 * New configure option --enable-systemtap builds SystemTap static probes
126 into libc for setjmp and longjmp and into libpthread for various operations.
127 So far the setjmp/longjmp probes and some of the libpthread probes are
128 provided only for i*86 and x86_64.
129 Implemented by Roland McGrath and Rayson Ho.
131 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
133 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
136 * More optimized functions for SPARC. Implemented by David S. Miller.
138 * Improved support for cross-compilation, especially bootstrap builds
139 without a previously built glibc.
141 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
142 Chris Metcalf from Tilera.
144 * Support for the old ARM ABI has been removed from ports. Only the EABI is
145 now supported for ARM processors.
147 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
148 as the name of the dynamic linker, to distinguish it from the
149 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
151 * Support for CRIS has been removed from ports.
153 * A new class of installed header has been documented for low-level
154 platform-specific functionality. PowerPC added the first instance with a
155 function to provide time base register access. Contributed by Tulio
156 Magno Quites Machado Filho.
158 * ix86 configurations now install header files that are consistent with
159 what x86-64 configurations install. These same header files can be used
160 for -m32, -m64, or -mx32 builds.
161 Contributed by H.J. Lu.
163 * Math library bug fixes. A thorough audit of all open math library bugs was
164 conducted by Joseph Myers. Significant progress was made on many math
165 library bugs resulting in more accurate exceptions and function results.
166 Many thanks to all those that contributed including Andreas Jaeger for his
167 patch review and work on the x87 trigonometric instruction issues.
169 * Timezone data is no longer installed. Timezone-related binaries and scripts
170 will continue to be installed. Users should obtain their timezone data from
171 their distribution provider or from the tzdata package at
172 <ftp://munnari.oz.au/pub/>.
176 * The following bugs are resolved with this release:
178 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
179 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
180 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
181 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
182 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
183 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
184 13484, 13506, 13515, 13523, 13524, 13538, 13540
186 * New program pldd to list loaded object of a process
187 Implemented by Ulrich Drepper.
189 * Add nss_db support back to glibc. No more dependency on Berkeley db
190 and support for initgroups lookups.
191 Implemented by Ulrich Drepper.
193 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
194 Contributed by HJ Lu.
196 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
197 Contributed by HJ Lu.
199 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
200 on x86-32 and x86-64.
201 Contributed by Liubov Dmitrieva.
203 * Optimized strchr and strrchr for SSE on x86-32.
204 Contributed by Liubov Dmitrieva.
206 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
207 for x86-64 and x86-32.
208 Contributed by Liubov Dmitrieva.
210 * New interfaces: scandirat, scandirat64
211 Implemented by Ulrich Drepper.
213 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
214 Implemented by Ulrich Drepper.
216 * nscd now also caches the netgroup database.
217 Implemented by Ulrich Drepper.
219 * Integrate libm with gcc's -ffinite-math-only option.
220 Implemented by Ulrich Drepper.
222 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
223 to math functions. Implemented by Ulrich Drepper.
225 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
226 Implemented by Ulrich Drepper.
228 * New Linux interfaces: process_vm_readv, process_vm_writev
230 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
231 Implemented by Ulrich Drepper.
233 * Optimized nearbyint and strcasecmp for PPC.
234 Implemented by Adhemerval Zanella.
236 * New locales: bho_IN, unm_US, es_CU, ta_LK
240 * The following bugs are resolved with this release:
242 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
243 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
244 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
245 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
246 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
247 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
248 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
249 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
250 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
251 12795, 12811, 12813, 12814, 12841
253 * The RPC implementation in libc is obsoleted. Old programs keep working
254 but new programs cannot be linked with the routines in libc anymore.
255 Programs in need of RPC functionality must be linked against TI-RPC.
256 The TI-RPC implementation is IPv6 enabled and there are other benefits.
258 Visible changes of this change include (obviously) the inability to link
259 programs using RPC functions without referencing the TI-RPC library and the
260 removal of the RPC headers from the glibc headers.
261 Implemented by Ulrich Drepper.
263 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
264 syncfs, setns, sendmmsg
266 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
267 yue_HK, lij_IT, mhr_RU
269 * New encodings: CP770, CP771, CP772, CP773, CP774
271 * New program sotruss to trace calls through PLTs
272 Implemented by Ulrich Drepper.
274 * The malloc hook implementation is marked deprecated and will be removed
275 from the default implementation in the next version. The design never
276 worked ever since the introduction of threads. Even programs which do
277 not create threads themselves can use multiple threads created internally.
281 * The following bugs are resolved with this release:
283 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
284 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
285 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
286 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
289 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
291 * POWER7 optimizations: memset, memcmp, strncmp
293 * New optimized string functions for x86-64: strnlen (SSE2),
294 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
295 Implemented by Ulrich Drepper.
299 * The following bugs are resolved with this release:
301 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
302 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
303 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
304 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
305 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
306 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
307 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
308 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
310 * New interfaces: pthread_getname_np, pthread_setname_np
312 * New Linux interface: recvmmsg
314 * STT_GNU_IFUNC implemented for Sparc by David Miller.
316 * The dynamic linker now recognizes supported ABI versions from the
317 EI_ABIVERSION field in the ELF header.
318 Implemented by Ulrich Drepper.
320 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
321 will not be used to fill in password fields in the passwd.byname replies.
322 Instead it is used to synthesize the shadow.byname table, should it be
323 missing. This is a useful mode in some installations involving Solaris.
324 Implemented by Ulrich Drepper.
326 * New locales: kok_IN, sq_MK, cv_RU
330 * The following bugs are resolved with this release:
332 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
333 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
334 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
335 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
336 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
337 10789, 10817, 10823, 10840, 10847
339 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
341 Implemented by Ulrich Drepper.
343 * Checking version of longjmp added that fails if an uninitialized stack
344 frame would be created. Implemented by Ulrich Drepper.
346 * STT_GNU_IFUNC is now supported in static executables.
347 Implemented by H.J. Lu.
349 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
351 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
352 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
353 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
354 Contributed by H.J. Lu.
356 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
357 Implemented by Ulrich Drepper.
359 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
361 Contributed by H.J. Lu.
363 * Support for fma instruction in AVX on x86-64.
364 Implemented by H.J. Lu and Ulrich Drepper.
366 * AVX support in x86-64 auditing support in ld.so.
367 Implemented by H.J. Lu.
369 * STB_GNU_UNIQUE support added.
370 Implemented by Ulrich Drepper.
372 * Implement second fallback mode for optimized DNS lookup for even more
373 broken environments. If two requests from the same port are not
374 handled correctly close the socket and open a new one before sending
375 the second request. The 'single-request-reopen' option in /etc/resolv.conf
376 can be used to select this mode right away, instead of rediscovering the
377 necessity is every process again.
378 Implemented by Ulrich Drepper.
380 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
381 Implemented by Adam Tkac.
383 * Optimized iconv conversions for S390x.
384 Implemented by Andreas Krebbel.
386 * Using condvars with PI mutexes is now more efficient due to kernel
387 support for requeueing to PI futexes. NPTL support added for x86-64.
388 Implemented by Ulrich Drepper.
390 * New locales: ps_AF, my_MM
394 * The following bugs are resolved with this release:
396 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
397 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
398 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
399 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
400 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
402 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
403 Implemented by Ulrich Drepper.
405 * New Linux interfaces: accept4, fallocate, fallocate64.
406 Implemented by Ulrich Drepper.
408 * Correct declarations of string function when used in C++ code. This
409 could lead to compile errors for invalid C++ code.
411 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
414 * New POSIX 2008 interface: psiginfo
415 Implemented by Ulrich Drepper.
417 * New ISO C++1x interfaces: quick_exit, at_quick_exit
418 Implemented by Ulrich Drepper.
420 * Support for selecting between multiple function definitions at runtime
421 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
423 * The libcrypt library can now use the hash function implementations in
424 NSS. Implemented by Ulrich Drepper.
426 * The malloc implementation can be compiled to be less memory efficient
427 but higher performing in multi-threaded programs.
428 Implemented by Ulrich Drepper.
430 * New locales: nan_TW@latin, ks_IN
432 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
433 Implemented by Ulrich Drepper.
435 * Extended printf hook support. It is possible to use user-defined types
436 and extend existing format specifiers.
437 Implemented by Ulrich Drepper.
439 * Handling for group shadow files has been added.
440 Implemented by Ulrich Drepper.
442 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
443 servers (the case, e.g., for some people using the built-in DNS
444 server in ADSL modems/routers). There is a once-per-process timeout
445 in case of a broken server. To avoid it, users can run nscd or put
446 'options single-request' in /etc/resolv.conf.
447 Implemented by Ulrich Drepper.
451 * The following bugs are resolved with this release:
453 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
454 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
455 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
456 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
457 6968, 6974, 6980, 6995, 7008, 7009, 7029
459 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
460 up at the same time. Implemented by Ulrich Drepper.
462 * TLS descriptors for LD and GD on x86 and x86-64.
463 Implemented by Alexandre Oliva.
465 * getaddrinfo now handles DCCP and UDPlite.
466 Implemented by Ulrich Drepper.
468 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
469 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
470 Implemented by Ulrich Drepper.
472 * New implementation of memmem, strstr, and strcasestr which is O(n).
473 Implemented by Eric Blake.
475 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
477 * Implement "e" option for popen to open file descriptor with the
478 close-on-exec flag set. Implemented by Ulrich Drepper.
480 * Implement "b" mode for fmemopen. In this mode writes writes don't
481 implicitly add a NUL byte and seeks from the end of the buffer really
482 use the buffer end, not the string length as the basis.
483 Implemented by Ulrich Drepper.
485 * Many functions, exported and internal, now atomically set the close-on-exec
486 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
488 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
490 Implemented by Pravin Satpute.
492 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
496 * The following bugs are resolved with this release:
498 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
499 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
500 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
501 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
502 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
503 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
504 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
506 * New locales: bo_CN, bo_IN, shs_CA.
508 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
510 * Sorting rules for some Indian languages (Devanagari and Gujarati).
511 Implemented by Pravin Satpute.
513 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
515 * nscd caches now all timeouts for DNS entries
516 Implemented by Ulrich Drepper.
518 * nscd is more efficient and wakes up less often.
519 Implemented by Ulrich Drepper.
521 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
522 vdprintf, and obstack_vprintf.
523 Implemented by Jakub Jelinek.
525 * Faster memset for x86-64.
526 Implemented by Harsha Jagasia and H.J. Lu.
528 * Faster memcpy on x86.
529 Implemented by Ulrich Drepper.
531 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
532 Implemented by Ulrich Drepper.
534 * Faster sqrt and sqrtf implemention for some PPC variants.
535 Implemented by Steven Munroe.
539 * The following bugs are resolved with this release:
541 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
542 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
543 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
544 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
545 5071, 5103, 5104, 5112, 5113, 5184, 5186
547 * More checking functions: fread, fread_unlocked, open*, mq_open.
548 Implemented by Jakub Jelinek and Ulrich Drepper.
550 * Extend fortification to C++. Implemented by Jakub Jelinek.
552 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
553 by not recognizing 'a' as a modifier when those specs are requested.
554 Implemented by Jakub Jelinek.
556 * PPC optimizations to math and string functions.
557 Implemented by Steven Munroe.
559 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
560 options to be passed. Implemented by Ulrich Drepper.
562 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
564 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
565 Implemented by Ulrich Drepper.
567 * Handle private futexes in the NPTL implementation.
568 Implemented by Jakub Jelinek and Ulrich Drepper.
570 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
571 Implemented by Roland McGrath and Ulrich Drepper.
573 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
575 * SHA-256 and SHA-512 based password encryption.
576 Implemented by Ulrich Drepper.
578 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
579 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
582 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
583 Implemented by Ulrich Drepper.
587 * The following bugs are resolved with this release:
589 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
590 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
591 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
592 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
593 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
594 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
595 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
598 * New Linux interfaces: epoll_pwait, sched_getcpu.
600 * New generic interfaces: strerror_l.
602 * nscd can now cache the services database. Implemented by Ulrich Drepper.
606 * The following bugs are resolved with this release:
608 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
609 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
610 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
611 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
612 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
613 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
614 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
615 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
616 3225, 3251, 3252, 3253, 3273
618 * For Linux, the sorting of addresses returned by getaddrinfo now also
619 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
620 Implemented by Ulrich Drepper.
622 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
623 Implemented by Ulrich Drepper.
625 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
627 * New iconv module for MIK. Contributed by Alexander Shopov.
629 * For sites with broken group and/or passwd database, the auto-propagate
630 option of nscd can prevent creating ID lookup entries from the results
631 of a name lookup and vice versa. This usually is no problem but some
632 site might have problems with the default behavior.
633 Implemented by Ulrich Drepper.
635 * Iterating over entire database in NIS can be slow. With the
636 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
637 to trade time for memory. The entire database will be read at once.
638 Implemented by Ulrich Drepper.
640 * The interfaces introduced in RFC 3542 have been implemented by
643 * Support for the new ELF hash table format was added by Ulrich Drepper.
645 * Support for priority inheritance mutexes added by Jakub Jelinek and
648 * Support for priority protected mutexes added by Jakub Jelinek.
650 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
651 or_IN, csb_PL, fy_NL, sr_ME.
655 * More overflow detection functions.
657 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
658 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
660 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
661 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
662 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
663 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
664 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
665 by Masahide Washizawa.
667 * It is now possible to install audit libraries for the dynamic linker using
668 LD_AUDIT. Implemented by Ulrich Drepper.
670 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
671 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
672 For a libc and libpthread that works well on Linux 2.4 kernels, we
673 recommend using the stable 2.3 branch.
675 * The new function open_wmemstream acts like open_memstream,
676 but uses a wchar_t wide character buffer.
678 * The new function ppoll is an improved version of poll, similar to pselect.
680 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
681 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
682 renameat, unlinkat, linkat, symlinkat, readlinkat.
684 * New Linux kernel system calls: unshare,
685 inotify_init, inotify_add_watch, inotify_rm_watch.
687 * The euidaccess function is now also known by the alias eaccess,
688 for compatibility with some other systems.
690 * Timezone data updated to 2006b version.
694 * The following bugs are resolved with this release:
696 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
697 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
698 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
699 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
700 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
701 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
703 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
705 * As of this release, GCC 4 can be used to compile the C Library.
707 * Timezone data updated to 2005m version.
711 * The following bugs are resolved with this release:
713 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
714 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
715 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
716 777, 787, 821, 822, 823, 825
718 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
722 * Support for RFC 3678. Real implementations exist only for Linux so far.
723 Implemented by Ulrich Drepper.
725 * nscd can now cache entries persistently. Expiring entries are reloaded.
726 For speedups the cache can be shared in memory with client processes.
727 Implemented by Ulrich Drepper.
729 * nscd can now perform SELinux checks.
730 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
732 * getaddrinfo queries are now cached. Canonical name lookup is performed
734 Implemented by Ulrich Drepper.
736 * The nothrow function attribute is used when headers are used by gcc when
737 compiling C code. This can avoid significant amounts of exception
740 * The malloc functions perform more error checking and are stricter when
741 it comes to reacting on errors. The default action is to terminate
742 the process after showing an error message. Implemented by Ulrich Drepper.
744 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
745 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
747 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
748 namespaces using the new function dlmopen(). This feature is of course,
749 like most other dynamic loading functionality, not available in statically
750 linked applications. Implemented by Ulrich Drepper.
752 * Low-overhead boundary checking variants of string and some stdio functions
753 were added. These are to be used in conjunction with a gcc patch by
754 Jakub Jelinek which adds calls to these functions if possible.
755 Implemented by Jakub Jelinek and Ulrich Drepper.
757 * Old code for several operating systems and machine architectures that
758 have not been in working condition in a long time have been removed from
759 the main source tree maintained by the GNU C Library's maintainers.
760 These files are now reside in the separate `ports' source module
761 that is usable as an add-on when building the library.
765 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
766 interrogate the dynamic linker, compatible with the Solaris interface.
768 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
769 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
771 * getifaddrs now uses the netlink interface on Linux to get its information.
772 Implemented by Thorsten Kukuk.
774 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
775 Implemented by Ulrich Drepper.
777 * support for non-executable stacks on x86 has been added. Changes mostly
780 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
783 * getaddrinfo now performs destination address selection according to
788 * Thread-safe interfaces for many functions that access locale data
789 were added in version 2.3, but these features were omitted from NEWS.
790 Many functions have variants with an `_l' suffix that take a `locale_t'
791 object as a parameter rather than consulting the current locale.
792 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
793 create and maintain `locale_t' objects. Additionally, the new function
794 `uselocale' sets "the current locale" (as used by functions not so
795 parameterized) set for an individual thread. These features were added
796 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
798 * The functions getresuid, getresgid, setresuid, and setresgid, which
799 have long been available on Linux, are now declared in <unistd.h>
800 and are now also available on the Hurd.
802 * ELF thread-local storage support (TLS) now works on x86-64.
804 * The new dynamic string token $LIB is expanded in shared library names.
805 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
807 * Aldy Hernandez contributed complete software floating point support for
808 PowerPC machines with no FPU.
810 * fexecve is implemented on Linux.
812 * The `btowc' function should work at least twice as fast due to
813 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
815 * With approriate thread add-ons cancelable functions are now implemented
816 in libc.so as well. No need to call the function in libpthread. This
817 change allowed to finally disable the incorrect and expensive handling
818 of weak definition in ld.so.
820 * Yet more PLT entries in libc.so have been removed. We finally arrived
821 at the bare minimum. Startup times improved appropriately.
823 * Support for the new Linux/x86 system call interface was added. The
824 AT_SYSINFO auxiliary vector entry is recognized and handled.
828 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
831 * iconv (the program and the interface) now accepts empty names (excluding
832 options like //TRANSLIT) to mean "use charset of current locale".
834 * localedef can now transliterate characters in strings which are not in
835 the provided charmap. The information from the input locale is used.
837 * Prelinking support was added for ELF targets. This requires additional
838 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
840 * Read-only stdio streams now use mmap to speed up operation by eliminating
841 copying and buffer underflows. To use add 'm' to the mode string of
842 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
844 * The malloc functions were completely rewritten by Wolfram Gloger based
845 on Doug Lea's malloc-2.7.0.c.
847 * Isamu Hasegawa contributed a completely new and POSIX-conformant
848 implementation of regex.
850 * Bruno Haible upgraded the iconv and locale implementation to support
853 * Contents of the LC_* and LANG environment variables in the CEN style are
854 not recognized anymore. It never was used. Change by Ulrich Drepper.
856 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
857 thread-local storage (TLS) ABI on some platforms.
858 Changes by Ulrich Drepper. SH support by Kaz Kojima.
860 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
861 EUC-JISX0213, and TSCII.
863 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
864 BSD-compatible interface for getting all network interface addresses.
865 Implementation for IPv4 by Roland McGrath.
867 * Loading of locale data is faster due to the introduction of a locale
868 archive. Implemented by Roland McGrath and Ulrich Drepper.
870 * Startup times are significantly reduced by not using exported functions
871 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
874 * Steven Munroe contributed a port to PowerPC64/Linux.
878 * The Hurd now uses the GNU libio implementation of stdio rather than the
879 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
881 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
882 with the same behavior as the Linux system call of the same name.
886 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
887 128-bit long double format.
889 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
890 IBM1161, and IBM1162 charsets.
892 * Andreas Jaeger contributed a port to x86-64/Linux.
894 * Peter Bruin contributed a port to PowerPC/Hurd.
896 * libc functions using I/O streams now can handle wide-oriented streams
899 * optimizations in the dynamic linker. Binaries created by recent binutils
900 versions start up quicker due to reduced time spent on relocations.
902 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
906 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
907 asinh, atanh, j0 for the 128-bit long double format.
909 * Bruno Haible updated all the code handling Unicode in some form to
912 * Speed of regex for single-byte locales is back to previous levels.
913 Patch by Isamu Hasegawa.
915 * Alpha, SPARC, and IA-64 now also using floating stacks.
917 * Startup time of internationalized applications greatly improved through
918 iconv cache. Use iconvconfig to generate the cache file.
919 Contributed by Ulrich Drepper.
921 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
922 severe performance problems. Patch by David Mosberger.
924 * The Hurd port got a lot more functionality like AIO, various stdio
925 extensions, etc. Mainly done by Roland McGrath.
927 * mtrace can now lookup symbols in shared libraries.
931 * Intel's IA-64 math library is largely integrated. It provides fast and
932 accurate implementatations for most basic and standard math functions
933 in float, double, and long double format.
935 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
936 and asin for the 96-bit long double format and asin, log, tan for the
937 128-bit long double format.
939 * The beginning of a last-bit accurate math library by IBM Haifa were added.
940 The basic double functions exist today. Contributed by Abraham Ziv
941 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
942 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
944 * An asynchronous name lookup library was added. The interface is designed
945 after POSIX AIO. The proposal was circulated beforehand to get comments.
946 No negative ones came in. Implemented by Ulrich Drepper.
948 * Port to S390/64bit contributed by Martin Schwidefsky
949 <schwidefsky@de.ibm.com>.
951 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
952 of functions for Linux/IA-64.
954 * The RPC code is now thread safe. Threads can now use the same service
955 of different services at the same time. Patch by Eric Norum
956 <eric.norum@usask.ca> with some help by Ulrich Drepper.
958 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
959 family of functions for Linux/S390.
961 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
962 of functions for Linux/x86.
964 * Port to Linux/CRIS contributed by Axis Communications.
968 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
969 we can now check for namespace violations and missing declarations. The
970 result is that almost all headers are now Unix-compliant (as defined in
971 the upcoming XPG6). The negative side is that some programs might need
972 corrections, too, if they depend on the incorrect form of the headers in
973 previous versions which defined too many symbols and included too many
976 * regex now handles multibyte character sets correctly.
977 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
979 * iconv (the program) does now conform to the upcoming XPG6 and handles
980 charmaps. Instead of the charset names the path of charmaps can be
981 provided and the conversion happens based on this data.
982 Contributed by Ulrich Drepper.
984 * The locale program now provides detailed information about the installed
989 only lists the names of the supported locales
993 provides details such as country, language, and codeset name.
994 Contributed by Ulrich Drepper.
998 * The gencat program now parses the input file according to the charset
999 selected by the LC_CTYPE category. This is important for stateful
1000 character sets. To make generating catalogs easier there is a way
1001 to overwrite the charset selected by the locale: before the first
1002 message or $ quote line the catalog can contain a line like
1004 $ codeset=ISO-8859-2
1006 to select the charset (ISO-8859-2 in this case).
1008 Implemented by Shinya Hanataka and Ulrich Drepper.
1010 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1011 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1012 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1014 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1015 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1017 * The LANGUAGE environment variable is now ignored unless the locale is
1018 changed from the default "C" locale.
1020 * The usual bug fixes.
1024 * Greg McGary added runtime support for bounds checking using gcc's
1025 new -fbounded-pointers option. ix86 target is complete. PowerPC
1028 * Thorsten Kukuk added secure mode support to nscd.
1030 * The Berkeley db libraries have been removed.
1032 Related, the nss_db module is now in a separate package since it
1033 obviously requires a database library being available.
1035 * Wide character I/O streams implemented by Ulrich Drepper.
1037 * Functions from the extended socket API added by Ulrich Drepper.
1039 * Functions feenableexcept and fedisableexcept to control the
1040 behaviour of individual exceptions have been added by Andreas Jaeger.
1042 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1044 * The resolver code has been updated from bind 8.2.3-T5B which supports
1045 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1048 This change could in some situations effect backward compatibility. Since
1049 now `_res' is a thread-local instead of a global variable, modifying it
1050 in one thread does not have any effect in other threads.
1052 The resolver library was also extended to allow IPv6 as the transport
1053 protocol for the requests. This work was done by Stig Venaas.
1055 * Compatibility code for K&R C compilers has been removed from the
1056 header files. A ISO C compiler is needed to use the library
1057 (conforming to either C89 or C99 standard).
1059 * Complete rewrite of the localedef program to support multibyte character
1060 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1061 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1062 Implemented by Ulrich Drepper.
1064 Bruno Haible significantly improved the generation and use of the data
1065 structures for the wide character tables.
1067 * Plural handling in gettext implemented by Ulrich Drepper.
1069 * The utmp daemon has been removed.
1071 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1073 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1076 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1078 * POSIX barriers implemented by Kaz Kylheku.
1080 * POSIX spawn function family implemented by Ulrich Drepper.
1082 * POSIX spinlocks are now available.
1084 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1086 * the configure option --enable-kernel=X.Y.Z allows to strip out
1087 compatibility for kernel versions before X.Y.Z. This is currently only
1088 implemented for Linux.
1090 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1091 field sin6_scope_id. This means that all programs using IPv6 should be
1092 recompiled. Don't expect binary compatibility with previous glibc
1095 * various conversion modules for IBM character sets contributed by
1098 * IA-64 port by Jes Sorensen and HJ Lu.
1112 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1114 * New xdr functions are added; some rpc functions are now 64bit clean.
1116 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1118 * Fixed known incompatibilities with glibc 2.0.
1120 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1122 * Optimized a number of functions (especially the ELF dynamic loader).
1124 * Update timezone data files.
1126 * lots of charmaps corrections
1128 * some new locale definitions and charmaps
1133 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1134 conform to POSIX member type requirements. Symbol versions have been
1135 adjusted as needed within the library, and for direct use by applications,
1136 but there is potential for problems if third-party libraries use
1137 struct timeval as part of their interface. This does not present
1138 a problem for X and other "essential" system libraries.
1140 * An additional locale model to support C++ Standard Library locale
1141 model and probably more was implemented by Ulrich Drepper.
1143 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1146 * Miles Bader provided the `argp' function family to support hierachical
1147 command line argument parsing, layered on top of getopt.
1149 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1151 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1154 * scanf recognizes the %a and %A format for scanning floating point numbers.
1156 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1157 information and interfaces for the available integer types.
1159 * about 130 new math functions were added to implement the ISO C9x math
1162 * the new header <complex.h> contains definitions of the complex math
1163 functions from ISO C 9X.
1165 * the new header <tgmath.h> defines generic macros to use complex or
1166 real valued functions.
1168 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1170 * Andreas Jaeger provided a test suite for the math library.
1172 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1174 * Ulrich Drepper added character set conversion functions (iconv).
1176 * Optimized string functions have been added.
1178 * The localedata addon is now part of glibc.
1180 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1182 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1183 daemon for NSS (nscd).
1185 Missing a better place here are some numbers on improvements. Under
1186 Linux 2.1.125 un-tar-ing the kernel sources takes
1190 using local files 12.19s 6.88s 22.91s
1192 using NIS 13.92s 8.91s 26.34s
1194 using NIS & nscd 10.37s 7.34s 25.30s
1196 using NIS+ 27.57s 30.37s 640.46s
1198 using NIS+ & nscd 10.25s 7.83s 26.51s
1200 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1202 Keep in mind that non-namelookup related operations dominate above times.
1203 It was just a common complain that using NIS+ unpacking the kernel is
1206 [1] The old nscd implementation is not available anymore since it was
1207 distributed with glibc up to version 2.0.98 and thus is now replaced.
1209 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1211 * Mark Kettenis provided a Hesiod NSS module.
1213 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1214 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1216 * rcmd can now handle netgroups (Dick Streefland).
1218 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1221 * Support for the IPv6 protocol has been added to the socket API, as per the
1222 latest draft standards.
1224 * Support for Linux 2.2 has been added.
1226 * Interface changes relative to the latest 2.0.x release:
1227 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1228 addseverity NEW: Unix98
1229 alphasort64 NEW: LFS
1230 argp_err_exit_status NEW: argp, GNU ext
1231 argp_error NEW: argp, GNU ext
1232 argp_failure NEW: argp, GNU ext
1233 argp_help NEW: argp, GNU ext
1234 argp_parse NEW: argp, GNU ext
1235 argp_program_bug_address NEW: argp, GNU ext
1236 argp_program_version NEW: argp, GNU ext
1237 argp_program_version_hook NEW: argp, GNU ext
1238 argp_state_help NEW: argp, GNU ext
1239 argp_usage NEW: argp, GNU ext
1240 authdes_create NEW: Secure RPC
1241 authdes_getucred NEW: Secure RPC
1242 authdes_pk_create NEW: Secure RPC
1243 backtrace NEW: GNU ext.
1244 backtrace_symbols NEW: GNU ext.
1245 backtrace_symbols_fd NEW: GNU ext.
1247 cacosf NEW: ISO C 9x
1248 cacosh NEW: ISO C 9x
1249 cacoshf NEW: ISO C 9x
1250 cacoshl NEW: ISO C 9x
1251 cacosl NEW: ISO C 9x
1258 casinf NEW: ISO C 9x
1259 casinh NEW: ISO C 9x
1260 casinhf NEW: ISO C 9x
1261 casinhl NEW: ISO C 9x
1262 casinl NEW: ISO C 9x
1264 catanf NEW: ISO C 9x
1265 catanh NEW: ISO C 9x
1266 catanhf NEW: ISO C 9x
1267 catanhl NEW: ISO C 9x
1268 catanl NEW: ISO C 9x
1269 cbc_crypt NEW: Secure RPC
1273 ccoshf NEW: ISO C 9x
1274 ccoshl NEW: ISO C 9x
1280 cimagf NEW: ISO C 9x
1281 cimagl NEW: ISO C 9x
1282 clearerr_locked REMOVED
1283 clntunix_create NEW: sunrpc ext
1285 clog10 NEW: ISO C 9x
1286 clog10f NEW: ISO C 9x
1287 clog10l NEW: ISO C 9x
1297 cprojf NEW: ISO C 9x
1298 cprojl NEW: ISO C 9x
1300 crealf NEW: ISO C 9x
1301 creall NEW: ISO C 9x
1306 csinhf NEW: ISO C 9x
1307 csinhl NEW: ISO C 9x
1310 csqrtf NEW: ISO C 9x
1311 csqrtl NEW: ISO C 9x
1315 ctanhf NEW: ISO C 9x
1316 ctanhl NEW: ISO C 9x
1318 des_setparity NEW: Secure RPC
1319 ecb_crypt NEW: Secure RPC
1320 endutxent NEW: Unix98
1322 exp10f NEW: ISO C 9x
1323 exp10l NEW: ISO C 9x
1327 fattach NEW: STREAMS
1328 fdetach NEW: STREAMS
1332 feclearexcept NEW: ISO C 9x
1333 fegetenv NEW: ISO C 9x
1334 fegetexceptflag NEW: ISO C 9x
1335 fegetround NEW: ISO C 9x
1336 feholdexcept NEW: ISO C 9x
1338 feraiseexcept NEW: ISO C 9x
1339 ferror_locked REMOVED
1340 fesetenv NEW: ISO C 9x
1341 fesetexceptflag NEW: ISO C 9x
1342 fesetround NEW: ISO C 9x
1343 fetestexcept NEW: ISO C 9x
1344 feupdateenv NEW: ISO C 9x
1345 fflush_locked REMOVED
1349 fgets_unlocked NEW: GNU ext.
1350 fileno_locked REMOVED
1362 fputc_locked REMOVED
1363 fputs_unlocked NEW: GNU ext.
1364 fread_unlocked NEW: GNU ext.
1369 fstatvfs NEW: Unix98
1373 ftruncate64 NEW: LFS
1375 fwrite_unlocked NEW: GNU ext.
1376 gai_strerror NEW: IPv6
1380 getchar_locked REMOVED
1382 getdate_err NEW: Unix98
1383 getdate_r NEW: GNU ext.
1385 getnameinfo NEW: IPv6
1386 getnetname NEW: Secure RPC
1387 getpmsg NEW: STREAMS
1388 getpt NEW: Unix98 PTY
1389 getrlimit64 NEW: LFS
1390 getutxent NEW: Unix98
1391 getutxid NEW: Unix98
1392 getutxline NEW: Unix98
1393 glob64 NEW: GNU ext.
1394 globfree64 NEW: GNU ext.
1395 gnu_get_libc_release NEW: GNU ext.
1396 gnu_get_libc_version NEW: GNU ext.
1397 grantpt NEW: Unix98 PTY
1398 host2netname NEW: Secure RPC
1400 iconv_close NEW: iconv
1401 iconv_open NEW: iconv
1402 if_freenameindex NEW: IPv6
1403 if_indextoname NEW: IPv6
1404 if_nameindex NEW: IPv6
1405 if_nametoindex NEW: IPv6
1406 in6addr_any NEW: IPv6
1407 in6addr_loopback NEW: IPv6
1408 inet6_isipv4mapped NEW: IPv6
1409 isastream NEW: STREAMS
1410 iswblank NEW: GNU ext.
1411 key_decryptsession NEW: Secure RPC
1412 key_decryptsession_pk NEW: Secure RPC
1413 key_encryptsession NEW: Secure RPC
1414 key_encryptsession_pk NEW: Secure RPC
1415 key_gendes NEW: Secure RPC
1416 key_get_conv NEW: Secure RPC
1417 key_secretkey_is_set NEW: Secure RPC
1418 key_setnet NEW: Secure RPC
1419 key_setsecret NEW: Secure RPC
1420 llrint NEW: ISO C 9x
1421 llrintf NEW: ISO C 9x
1422 llrintl NEW: ISO C 9x
1423 llround NEW: ISO C 9x
1424 llroundf NEW: ISO C 9x
1425 llroundl NEW: ISO C 9x
1430 lrintf NEW: ISO C 9x
1431 lrintl NEW: ISO C 9x
1432 lround NEW: ISO C 9x
1433 lroundf NEW: ISO C 9x
1434 lroundl NEW: ISO C 9x
1436 makecontext NEW: Unix98
1437 mempcpy NEW: GNU ext.
1440 modify_ldt NEW: kernel
1444 nearbyint NEW: ISO C 9x
1445 nearbyintf NEW: ISO C 9x
1446 nearbyintl NEW: ISO C 9x
1447 netname2host NEW: Secure RPC
1448 netname2user NEW: Secure RPC
1449 nexttoward NEW: ISO C 9x
1450 nexttowardf NEW: ISO C 9x
1451 nexttowardl NEW: ISO C 9x
1455 passwd2des NEW: Secure RPC
1457 pow10f NEW: GNU ext.
1458 pow10l NEW: GNU ext.
1461 printf_size NEW: GNU ext.
1462 printf_size_info NEW: GNU ext.
1463 profil_counter REMOVED
1464 pthread_mutexattr_getkind_np REPLACED
1465 pthread_mutexattr_setkind_np REPLACED
1466 ptsname NEW: Unix98 PTY
1467 ptsname_r NEW: Unix98 PTY
1469 putchar_locked REMOVED
1470 putgrent NEW: GNU ext.
1472 putpmsg NEW: STREAMS
1473 pututxline NEW: Unix98
1477 readdir64_r NEW: LFS
1478 remquo NEW: ISO C 9x
1479 remquof NEW: ISO C 9x
1480 remquol NEW: ISO C 9x
1482 roundf NEW: ISO C 9x
1483 roundl NEW: ISO C 9x
1485 scalbln NEW: ISO C 9x
1486 scalblnf NEW: ISO C 9x
1487 scalblnl NEW: ISO C 9x
1489 sendfile NEW: kernel
1490 setcontext NEW: Unix98
1491 setrlimit64 NEW: LFS
1492 setutxent NEW: Unix98
1494 sigignore NEW: Unix98
1495 sigqueue NEW: POSIX.1b
1496 sigrelse NEW: Unix98
1497 sigset NEW: POSIX.1b
1498 sigtimedwait NEW: POSIX.1b
1499 sigwaitinfo NEW: POSIX.1b
1500 sincos NEW: GNU ext.
1501 sincosf NEW: GNU ext.
1502 sincosl NEW: GNU ext.
1506 strcasestr NEW: GNU ext.
1507 strtoimax NEW: ISO C 9x
1508 strtoumax NEW: ISO C 9x
1509 strverscmp NEW: GNU ext.
1510 svcauthdes_stats NEW: Secure RPC
1511 svcunix_create NEW: sunrpc etx
1512 svcunixfd_create NEW: sunrpc ext
1513 swapcontext NEW: Unix98
1514 tcgetsid NEW: Unix98 PTY
1515 tdestroy NEW: GNU ext.
1516 tgamma NEW: ISO C 9x
1517 tgammaf NEW: ISO C 9x
1518 tgammal NEW: ISO C 9x
1522 truncf NEW: ISO C 9x
1523 truncl NEW: ISO C 9x
1525 unlockpt NEW: Unix98 PTY
1526 updwtmpx NEW: Unix98
1527 user2netname NEW: Secure RPC
1528 utmpxname NEW: Unix98
1529 versionsort NEW: GNU ext.
1530 versionsort64 NEW: GNU ext.
1532 wcscasecmp NEW: GNU ext.
1533 wcsncasecmp NEW: GNU ext.
1534 wcsnlen NEW: GNU ext.
1535 wcstoimax NEW: ISO C 9x
1536 wcstoll NEW: ISO C 9x
1537 wcstoull NEW: ISO C 9x
1538 wcstoumax NEW: ISO C 9x
1540 wordexp NEW: POSIX.2
1541 wordfree NEW: POSIX.2
1542 write_profiling REMOVED
1543 xdecrypt NEW: Secure RPC
1544 xdr_authdes_cred NEW: Secure RPC
1545 xdr_authdes_verf NEW: Secure RPC
1546 xdr_cryptkeyarg NEW: Secure RPC
1547 xdr_cryptkeyarg2 NEW: Secure RPC
1548 xdr_cryptkeyres NEW: Secure RPC
1549 xdr_getcredres NEW: Secure RPC
1550 xdr_key_netstarg NEW: Secure RPC
1551 xdr_key_netstres NEW: Secure RPC
1552 xdr_keybuf NEW: Secure RPC
1553 xdr_keystatus NEW: Secure RPC
1554 xdr_netnamestr NEW: Secure RPC
1555 xdr_sizeof NEW: Secure RPC
1556 xdr_unixcred NEW: sunrpc ext
1557 xencrypt NEW: Secure RPC
1558 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1569 * inet_ntoa is thread-safe
1571 * updwtmp is moved from libutil to libc
1573 * rewrite of cbrt function
1575 * update of timezone data
1589 * add atoll function
1591 * fix complex problems in Berkeley DB code
1593 * fix math functions
1597 * fixed lots of header problems (especially Linux/GNU specific)
1599 * dynamic loader preserves all registers
1601 * Roland McGrath provided support for handling of auxiliary objects in
1602 the ELF dynamic loader.
1604 * support for parallel builds is improved
1608 * GNU extensions are no longer declared by default. To enable them you
1609 must define the macro `_GNU_SOURCE' in your program or compile with
1612 * The library has changed from using GNU ld symbol aliases to using weak
1613 symbols where available. The ELF object file format supports weak
1614 symbols; GNU ld also supports weak symbols in the a.out format. (There
1615 is also now support for other GNU ld extensions in ELF. Use the
1616 `--with-elf' option to configure to indicate you have ELF, and
1617 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1618 of many files which contained only symbol aliases, reducing the size of
1619 the source and the compiled library; many other files were renamed to
1620 less cryptic names previously occupied by the symbol alias files.
1621 There is a new header file <elf.h> for programs which operate on
1622 files in the ELF format.
1624 * Converted to Autoconf version 2, so `configure' has more options.
1625 Run `configure --help' to see the details.
1627 * The library can now be configured to build profiling, highly-optimized
1628 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1629 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1630 `configure' enable building these extra libraries. The shared library is
1631 built by default when using both ELF and GNU ld. When shared libraries
1632 are enabled, the new library `-ldl' is available for arbitrary run-time
1633 loading of shared objects; its interface is defined in <dlfcn.h>. The
1634 new header file <link.h> gives access to the internals of the run-time
1635 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1636 application of same name on other systems and it provides information
1637 about dynamically linked binaries.
1639 * The C library now provides the run-time support code for profiling
1640 executables compiled with `-pg'. Programs can control the profiling code
1641 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1642 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1643 the support for this file format was contributed by David Mosberger-Tang.
1645 * The math code has been replaced with a math library based on fdlibm from
1646 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1647 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1648 functions. The math functions now reside in a separate library, so
1649 programs using them will need to use `-lm' their linking commands.
1651 * John C. Bowman contributed optimized ix87 assembler inline functions.
1653 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1654 mechanism similar to that found in Solaris 2. This is now used for the
1655 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1656 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1657 file controls what services are used for each individual database. This
1658 works by loading shared libraries with names specified in `nsswitch.conf',
1659 so service modules can be changed or added at any time without even
1660 relinking any program. Currently there are the file, db, and NIS based
1661 NSS services available.
1663 * The new functions `strtoq' and `strtouq' parse integer values from
1664 strings, like `strtol' and `strtoul', but they return `long long int' and
1665 `unsigned long long int' values, respectively (64-bit quantities).
1667 * The new functions `strtof' and `strtold' parse floating-point values from
1668 strings, like `strtod', but they return `float' and `long double' values,
1669 respectively (on some machines `double' and `long double' are the same).
1671 * Ulrich Drepper has contributed new implementations of the floating-point
1672 printing and reading code used in the `printf' family of functions and
1673 `strtod', `strtof', and `strtold'. These new functions are perfectly
1674 accurate, and much faster than the old ones.
1676 * The implementation of the POSIX locale model was completely rewritten by
1677 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1678 to compile the POSIX locale definition.
1680 * The former dummy implementations of the strcoll and strxfrm function are
1681 now replaced by fully functional code contributed by Ulrich Drepper. The
1682 collation information comes from the POSIX locale definitions.
1684 * The new header <langinfo.h> defines an interface for accessing
1685 various locale-dependent data (using the locale chosen with `setlocale').
1687 * Ulrich Drepper has contributed a new suite of functions for operation on
1688 wide-character and multibyte-character strings, in <wchar.h>;
1689 and classification and case conversion of wide characters, in <wctype.h>.
1690 These new functions are conforming to the ISO C, Amendement 1 specification.
1692 * There is now a second implementation of the standard I/O library available.
1693 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1694 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1696 * You can now use positional parameter specifications in format strings
1697 for the `printf' and `scanf' families of functions. For example,
1698 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1699 ``Number 6, Mr Jones''. This is mainly useful when providing different
1700 format strings for different languages, whose grammars may dictate
1701 different orderings of the values being printed. To support this
1702 feature, the interface for `register_printf_handler' has changed; see
1703 the header file <printf.h> for details.
1705 * The `printf' and `scanf' families of functions now understand a new
1706 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1707 to group numbers as indicated by the locale; for `scanf' and friends, this
1708 says to accept as valid only a number with all the proper grouping
1709 separators in the right places. In the default "C" locale, numbers are
1710 not grouped; but locales for specific countries will define the usual
1711 conventions (i.e. separate thousands with `,' in the US locale).
1713 * The pgrp functions have been regularized, slightly incompatibly but much
1714 less confusingly. The core functions are now `getpgid' and `setpgid',
1715 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1716 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1717 provided for compatibility. There is no longer an incompatible `getpgrp'
1718 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1720 * The new header file <fts.h> and suite of functions simplify programs that
1721 operate on directory trees. This code comes from 4.4 BSD.
1723 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1724 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1725 NSS scheme used in glibc.
1727 * There is a new malloc debugging hook `__memalign_hook'.
1729 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1730 `unsigned int' in <sys/types.h>. These are for compatibility only and
1731 their use is discouraged.
1733 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1734 done differently, so that it works even without GNU ld.
1736 * New function `euidaccess' checks allowed access to a file like `access',
1737 but using the effective IDs instead of the real IDs.
1739 * The time zone data files have been updated for the latest and greatest
1740 local time conventions of the countries of the world.
1742 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1745 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1746 for formatting floating-point numbers. They are provided only for
1747 compatibility; new programs should use `sprintf' instead. There are
1748 also equivalent function for the `long double' floating-point type and
1749 all functions also exist in a reentrant form.
1751 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1752 functions for maintaining the login-record files (primarily of use to
1753 system programs such as `login'), and convenient functions for
1754 allocating and initializing a pseudo-terminal (pty) device.
1756 * Ulrich Drepper has contributed new support for System V style
1757 shared memory and IPC on systems that support it.
1759 * Ulrich Drepper has contributed several miscellaneous new functions found
1760 in System V: The `hsearch' family of functions provide an effective
1761 implementation of hash tables; `a64l' and `l64a' provide a very simple
1762 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1765 * Ulrich Drepper has contributed new reentrant counterparts for the
1766 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1768 * Ulrich Drepper has contributed new, highly-optimized versions of several
1769 string functions for the i486/Pentium family of processors.
1771 * Ulrich Drepper has updated the Linux-specific code, based largely
1772 on work done in Hongjiu Lu's version of GNU libc for Linux.
1773 The GNU library now supports Linux versions 2.0.10 and later,
1774 using the ELF object file format (i[3456]86-*-linux).
1776 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1778 * David Mosberger-Tang and Richard Henderson have ported the C library
1779 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1780 dynamic linking support for ELF/Alpha.
1782 * Richard Henderson contributed several Alpha optimized assembler function
1783 for arithmetic and string handling.
1785 * Ulrich Drepper has contributed a new set of message catalog functions to
1786 support multiple languages using the <libintl.h> interface, for use with
1787 his new package GNU gettext. Translation volunteers have contributed
1788 catalogs of the library's messages in Spanish, German, and Korean.
1790 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1791 program and the `catgets' function for reading the catalog files it
1792 creates. (The <libintl.h> interface is preferred; we include the
1793 <nl_types.h> interface using `catgets' only for source compatibility with
1794 programs already written to use it.)
1796 * New header file <values.h> gives SVID-compatible names for <limits.h>
1799 * Various new macros, declarations, and small header files for compatibility
1802 * New function `group_member' is a convenient way to check if a process has
1803 a given effective group ID.
1805 * When using GCC 2.7 and later, the socket functions are now declared in a
1806 special way so that passing an argument of type `struct sockaddr_in *',
1807 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1808 `struct sockaddr *' type, does not generate a type-clash warning.
1810 * New function `error' declared in header file <error.h> is a convenient
1811 function for printing error messages and optionally exiting; this is the
1812 canonical function used in GNU programs. The new functions `err', `warn',
1813 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1814 doing the same thing.
1816 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1817 POSIX.2 `glob' function to do ~ and {...} expansion.
1819 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1820 `clearenv' which is used in POSIX.9 is also available.
1822 * New function `getsid' returns session ID number on systems that support it.
1824 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1825 files <db.h> and <mpool.h> provide a rich set of functions for several
1826 types of simple databases stored in memory and in files, and <ndbm.h> is
1827 an old `ndbm'-compatible interface using the `db' functions. Link with
1828 `-ldb' to get these functions.
1830 * New macro `strdupa' copies a string like `strdup', but uses local stack
1831 space from `alloca' instead of dynamic heap space from `malloc'.
1833 * New function `strnlen' is like `strlen' but searches only a given maximum
1834 number of characters for the null terminator. `stpncpy', `strndup' and
1835 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1838 * New function `statfs' in header <sys/statfs.h>.
1840 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1841 provide convenient functions for operating on blocks of null-terminated
1844 * A new suite of functions in <utmp.h> handle all the details of reading
1845 and writing the utmp file.
1847 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1850 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1851 completely POSIX compliant and also implemented the extended functionality
1852 to handle alternate digit representation and alternate era date formats.
1854 * Ulrich Drepper provided an implementation of the `strptime' function
1855 defined in XPG4.2 which transforms a string into a `struct tm' value.
1857 * Paul Eggert provided the tzselect shell script as part of the timezone
1858 code. The shell script makes it easy to select the correct timezone
1861 * The implementation of the malloc family of functions is completely replaced
1862 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1863 The implementation uses the mmap function (if available) and it is
1864 optimized for the use in multi threaded programs.
1866 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1867 functions. This new functionality is usable by specifying a special
1868 salt string and it is compatible with implementation on *BSD systems.
1870 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1871 `getsubopt' to handle second level command line options, `bsd_signal'
1872 to access BSD style `signal' functionality, the obsolete `regexp' style
1875 * the `lchown' function is available on system which support this
1878 * The implementation of the shadow password handling function was contributed
1881 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1883 * POSIX.1g support was added. The <sys/select.h> header is available,
1884 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1885 implementation of `getaddrinfo'.
1889 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1891 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1892 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1894 * The new function `daemon' from 4.4 BSD is useful for server programs that
1895 want to put themselves in the background.
1897 * Joel Sherrill has contributed support for several standalone boards that
1898 run without an operating system.
1900 * `printf', `scanf' and friends now accept a `q' type modifier for long
1901 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1903 * All of the code taken from BSD (notably most of the math and networking
1904 routines) has been updated from the BSD 4.4-Lite release.
1906 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1908 * The new functions `getdomainname' and `setdomainname' fetch or change the
1909 YP/NIS domain name. These are system calls which exist on systems which
1912 * The time zone data files have been updated for the latest international
1915 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1916 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1920 * The C library now includes support for Sun RPC, from Sun's free
1921 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1922 are included. (There is still no support for YP.)
1924 * Tom Quinn has contributed a port of the C library to SGI machines running
1925 Irix 4 (mips-sgi-irix4).
1927 * The new `lockf' function is a simplified interface to the locking
1928 facilities of `fcntl', included for compatibility.
1930 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1932 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1934 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1937 * The error message printed by `assert' for a failed assertion now includes
1938 the name of the program (if using GNU ld) and the name of the calling
1939 function (with versions of GCC that support this).
1941 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1943 * The library now includes the <sys/mman.h> header file and memory
1944 management functions `mmap', `munmap', `mprotect', `msync', and
1945 `madvise', on systems that support those facilities.
1947 * The interface for `mcheck' has changed slightly: the function called to
1948 abort the program when an allocation inconsistency is detected now takes
1949 an argument that indicates the type of failure. The new function
1950 `mprobe' lets you request a consistency check for a particular block at
1951 any time (checks are normally done only when you call `free' or `realloc'
1954 * It is now possible to easily cross-compile the C library, building on one
1955 system a library to run on another machine and/or operating system. All
1956 you need to do is set the variable `HOST_CC' in `configparms' to the
1957 native compiler for programs to run on the machine you are building on (a
1958 few generator programs are used on Unix systems); set `CC' to the
1961 * The new function `fexecve' (only implemented on the GNU system) executes
1962 a program file given a file descriptor already open on the file.
1966 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1967 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1969 * You can set the variable `libprefix' in `configparms' to specify a prefix
1970 to be prepended to installed library files; this makes it easy to install
1971 the GNU C library to be linked as `-lgnuc' or whatever.
1973 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1974 copies a limited number of characters from a string, and returns the
1975 address of the last character written.
1977 * You no longer need to check for whether the installed `stddef.h' is
1978 compatible with the GNU C library. configure now checks for you.
1980 * You can now define a per-stream `fileno' function to convert the
1981 stream's cookie into an integral file descriptor.
1983 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1984 allocates zero bytes of storage, and returns a unique pointer which
1985 you can pass to `realloc' or `free'. The behavior is undefined if
1986 you dereference this pointer.
1988 * The C library now runs on Sony NEWS m68k machines running either
1989 NewsOS 3 or NewsOS 4.
1991 * The new `syscall' function is a system-dependent primitive function
1992 for invoking system calls. It has the canonical behavior on Unix
1993 systems, including unreliable return values for some calls (such as
1994 `pipe', `fork' and `getppid').
1996 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1997 to `EAGAIN', which is the preferred name. On systems whose kernels
1998 use two distinct codes, the C library now translates EWOULDBLOCK to
1999 EAGAIN in every system call function.
2003 * The GNU C Library Reference Manual is now distributed with the library.
2004 `make dvi' will produce a DVI file of the printed manual.
2005 `make info' will produce Info files that you can read on line using C-h i
2006 in Emacs or the `info' program.
2007 Please send comments on the manual to bug-glibc-manual@gnu.org.
2009 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2011 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2013 * Jason Merrill has contributed a port to the Sequent Symmetry running
2014 Dynix version 3 (i386-sequent-dynix).
2016 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2017 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2019 * New function `memory_warnings' lets you arrange to get warnings when
2020 malloc is running out of memory to allocate, like Emacs gives you.
2022 * The C library now contains the relocating allocator used in Emacs 19 for
2023 its editing buffers. This allocator (ralloc) minimizes allocation
2024 overhead and fragmentation by moving allocated regions around whenever it
2025 needs to. You always refer to a ralloc'd region with a "handle" (a
2026 pointer to a pointer--an object of type `void **').
2028 * There is a new `printf' format: `%m' gives you the string corresponding
2029 to the error code in `errno'.
2031 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2032 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2033 pass, the `a' modifier says to fill in a `char **' you pass with a
2036 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2037 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2038 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2040 * `mkstemp' is a traditional Unix function to atomically create and open a
2041 uniquely-named temporary file.
2045 * The standard location for the file that says what the local timezone is
2046 has changed again. It is now `/usr/local/etc/localtime' (or more
2047 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2049 * The distribution no longer contains any files with names longer than 14
2052 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2053 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2055 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2059 * The configuration process has changed quite a bit. The `configure'
2060 script is now used just like the configuration scripts for other GNU
2061 packages. The `sysdeps' directory hierarchy is much rearranged.
2062 The file `INSTALL' explains the new scheme in detail.
2064 * The header files no longer need to be processed into ANSI C and
2065 traditional C versions. There is just one set of files to install, and
2066 it will work with ANSI or old C compilers (including `gcc -traditional').
2068 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2069 MIPS DECStation running Ultrix 4.
2071 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2072 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2073 made itself into a shared library.
2075 * Yet further improved support for the i386, running 4.3 BSD-like systems
2076 (such as Mach 3 with the Unix single-server), or System V.
2078 * New function `strncasecmp' to do case-insensitive string comparison
2079 with limited length.
2081 * New function `strsep' is a reentrant alternative to `strtok'.
2083 * New functions `scandir' and `alphasort' for searching directories.
2085 * New function `setenv' is a better interface to `putenv'.
2087 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2088 function for traversing a directory tree.
2090 * The GNU obstack package is now also part of the C library.
2091 The new function `open_obstack_stream' creates a stdio stream that
2092 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2093 formatted output directly to an obstack.
2095 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2096 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2098 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2100 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2101 things to your strings.
2103 * There are some new test programs: test-fseek, testmb, and testrand.
2105 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2106 These ports are not finished, but are a good starting place for really
2107 supporting those systems.
2109 * `/etc/localtime' is now the standard location for the file that says what
2110 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2111 This follows the general principle that `/etc' is the place for all local
2112 configuration files.
2114 * The C library header files now use `extern "C"' when used by the C++
2115 compiler, so the C library should now work with C++ code.
2117 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2118 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2121 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2122 function which uses the `merge sort' algorithm, and is said to be
2123 significantly faster than the old GNU `qsort' function. Merge sort is
2124 now the standard `qsort' function. The new algorithm can require a lot
2125 of temporary storage; so, the old sorting function is called when the
2126 required storage is not available.
2128 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2129 provides the Unix `crypt' function, plus some other entry points.
2131 * The code and header files taken from 4.4 BSD have been updated with the
2132 latest files released from Berkeley.
2134 ----------------------------------------------------------------------
2135 Copyright information:
2137 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2139 Permission is granted to anyone to make or distribute verbatim copies
2140 of this document as received, in any medium, provided that the
2141 copyright notice and this permission notice are preserved,
2142 thus giving the recipient permission to redistribute in turn.
2144 Permission is granted to distribute modified versions
2145 of this document, or of portions of it,
2146 under the above conditions, provided also that they
2147 carry prominent notices stating who last changed them.
2150 version-control: never
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