1 GNU C Library NEWS -- history of user-visible changes. 2012-1-27
2 Copyright (C) 1992-2009, 2010, 2011, 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:
12 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
13 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
14 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
15 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
16 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
17 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
18 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
19 12193, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058, 13361,
20 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547,
21 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566, 13576, 13583,
22 13592, 13594, 13613, 13618, 13637, 13656, 13658, 13673, 13691, 13695,
23 13704, 13705, 13706, 13726, 13738, 13739, 13750, 13758, 13760, 13761,
24 13775, 13786, 13787, 13792, 13806, 13824, 13840, 13841, 13844, 13846,
25 13851, 13852, 13854, 13871, 13872, 13873, 13879, 13883, 13884, 13885,
26 13886, 13892, 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915,
27 13916, 13917, 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926,
28 13927, 13928, 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967,
29 13968, 13970, 13973, 13979, 13983, 13986, 14012, 14027, 14033, 14034,
30 14036, 14040, 14043, 14044, 14049, 14053, 14055, 14059, 14064, 14080,
31 14083, 14103, 14104, 14109, 14122, 14123, 14153
35 + define static_assert
39 + declare at_quick_exit and quick_exit also for ISO C11
41 + aligned_alloc. NB: The code is deliberately allows the size parameter
42 to not be a multiple of the alignment. This is a moronic requirement
43 in the standard but it is only a requirement on the caller, not the
48 + uchar.h support added
50 + CMPLX, CMPLXF, CMPLXL added
52 Implemented by Ulrich Drepper.
54 * Support for the IA-64 has been moved to ports.
56 * Remove support for anything but ELF binary format
58 * Checking versions of poll, ppoll added.
59 Implemented by Ulrich Drepper.
61 * More generic and 64-bit performance optimizations to math functions.
62 Implemented by Ulrich Drepper.
64 * New configure option --enable-obsolete-rpc makes the deprecated RPC
65 headers and functions available at compile time as they were before
66 version 2.14. This option will be removed at some time in the future
67 after the TI-RPC library becomes fully sufficient for the needs of
68 existing applications.
70 * Compatibility code for Linux kernel versions before 2.4 has been removed.
71 Note that glibc is not expected to work with any Linux kernel version
74 * New header <sys/auxv.h> and function getauxval allowing easy access to
75 the AT_* key-value pairs passed from the Linux kernel. The header also
76 defines the HWCAP_* bits associated with the AT_HWCAP key.
80 * New configure option --enable-systemtap builds SystemTap static probes
81 into libc for setjmp and longjmp and into libpthread for various operations.
82 So far the setjmp/longjmp probes and some of the libpthread probes are
83 provided only for i*86 and x86_64.
84 Implemented by Roland McGrath and Rayson Ho.
88 * The following bugs are resolved with this release:
90 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
91 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
92 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
93 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
94 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
95 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
96 13484, 13506, 13515, 13523, 13524, 13538, 13540
98 * New program pldd to list loaded object of a process
99 Implemented by Ulrich Drepper.
101 * Add nss_db support back to glibc. No more dependency on Berkeley db
102 and support for initgroups lookups.
103 Implemented by Ulrich Drepper.
105 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
106 Contributed by HJ Lu.
108 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
109 Contributed by HJ Lu.
111 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
112 on x86-32 and x86-64.
113 Contributed by Liubov Dmitrieva.
115 * Optimized strchr and strrchr for SSE on x86-32.
116 Contributed by Liubov Dmitrieva.
118 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
119 for x86-64 and x86-32.
120 Contributed by Liubov Dmitrieva.
122 * New interfaces: scandirat, scandirat64
123 Implemented by Ulrich Drepper.
125 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
126 Implemented by Ulrich Drepper.
128 * nscd now also caches the netgroup database.
129 Implemented by Ulrich Drepper.
131 * Integrate libm with gcc's -ffinite-math-only option.
132 Implemented by Ulrich Drepper.
134 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
135 to math functions. Implemented by Ulrich Drepper.
137 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
138 Implemented by Ulrich Drepper.
140 * New Linux interfaces: process_vm_readv, process_vm_writev
142 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
143 Implemented by Ulrich Drepper.
145 * Optimized nearbyint and strcasecmp for PPC.
146 Implemented by Adhemerval Zanella.
148 * New locales: bho_IN, unm_US, es_CU, ta_LK
152 * The following bugs are resolved with this release:
154 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
155 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
156 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
157 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
158 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
159 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
160 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
161 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
162 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
163 12795, 12811, 12813, 12814, 12841
165 * The RPC implementation in libc is obsoleted. Old programs keep working
166 but new programs cannot be linked with the routines in libc anymore.
167 Programs in need of RPC functionality must be linked against TI-RPC.
168 The TI-RPC implementation is IPv6 enabled and there are other benefits.
170 Visible changes of this change include (obviously) the inability to link
171 programs using RPC functions without referencing the TI-RPC library and the
172 removal of the RPC headers from the glibc headers.
173 Implemented by Ulrich Drepper.
175 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
176 syncfs, setns, sendmmsg
178 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
179 yue_HK, lij_IT, mhr_RU
181 * New encodings: CP770, CP771, CP772, CP773, CP774
183 * New program sotruss to trace calls through PLTs
184 Implemented by Ulrich Drepper.
186 * The malloc hook implementation is marked deprecated and will be removed
187 from the default implementation in the next version. The design never
188 worked ever since the introduction of threads. Even programs which do
189 not create threads themselves can use multiple threads created internally.
193 * The following bugs are resolved with this release:
195 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
196 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
197 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
198 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
201 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
203 * POWER7 optimizations: memset, memcmp, strncmp
205 * New optimized string functions for x86-64: strnlen (SSE2),
206 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
207 Implemented by Ulrich Drepper.
211 * The following bugs are resolved with this release:
213 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
214 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
215 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
216 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
217 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
218 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
219 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
220 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
222 * New interfaces: pthread_getname_np, pthread_setname_np
224 * New Linux interface: recvmmsg
226 * STT_GNU_IFUNC implemented for Sparc by David Miller.
228 * The dynamic linker now recognizes supported ABI versions from the
229 EI_ABIVERSION field in the ELF header.
230 Implemented by Ulrich Drepper.
232 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
233 will not be used to fill in password fields in the passwd.byname replies.
234 Instead it is used to synthesize the shadow.byname table, should it be
235 missing. This is a useful mode in some installations involving Solaris.
236 Implemented by Ulrich Drepper.
238 * New locales: kok_IN, sq_MK, cv_RU
242 * The following bugs are resolved with this release:
244 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
245 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
246 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
247 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
248 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
249 10789, 10817, 10823, 10840, 10847
251 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
253 Implemented by Ulrich Drepper.
255 * Checking version of longjmp added that fails if an uninitialized stack
256 frame would be created. Implemented by Ulrich Drepper.
258 * STT_GNU_IFUNC is now supported in static executables.
259 Implemented by H.J. Lu.
261 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
263 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
264 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
265 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
266 Contributed by H.J. Lu.
268 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
269 Implemented by Ulrich Drepper.
271 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
273 Contributed by H.J. Lu.
275 * Support for fma instruction in AVX on x86-64.
276 Implemented by H.J. Lu and Ulrich Drepper.
278 * AVX support in x86-64 auditing support in ld.so.
279 Implemented by H.J. Lu.
281 * STB_GNU_UNIQUE support added.
282 Implemented by Ulrich Drepper.
284 * Implement second fallback mode for optimized DNS lookup for even more
285 broken environments. If two requests from the same port are not
286 handled correctly close the socket and open a new one before sending
287 the second request. The 'single-request-reopen' option in /etc/resolv.conf
288 can be used to select this mode right away, instead of rediscovering the
289 necessity is every process again.
290 Implemented by Ulrich Drepper.
292 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
293 Implemented by Adam Tkac.
295 * Optimized iconv conversions for S390x.
296 Implemented by Andreas Krebbel.
298 * Using condvars with PI mutexes is now more efficient due to kernel
299 support for requeueing to PI futexes. NPTL support added for x86-64.
300 Implemented by Ulrich Drepper.
302 * New locales: ps_AF, my_MM
306 * The following bugs are resolved with this release:
308 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
309 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
310 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
311 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
312 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
314 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
315 Implemented by Ulrich Drepper.
317 * New Linux interfaces: accept4, fallocate, fallocate64.
318 Implemented by Ulrich Drepper.
320 * Correct declarations of string function when used in C++ code. This
321 could lead to compile errors for invalid C++ code.
323 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
326 * New POSIX 2008 interface: psiginfo
327 Implemented by Ulrich Drepper.
329 * New ISO C++1x interfaces: quick_exit, at_quick_exit
330 Implemented by Ulrich Drepper.
332 * Support for selecting between multiple function definitions at runtime
333 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
335 * The libcrypt library can now use the hash function implementations in
336 NSS. Implemented by Ulrich Drepper.
338 * The malloc implementation can be compiled to be less memory efficient
339 but higher performing in multi-threaded programs.
340 Implemented by Ulrich Drepper.
342 * New locales: nan_TW@latin, ks_IN
344 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
345 Implemented by Ulrich Drepper.
347 * Extended printf hook support. It is possible to use user-defined types
348 and extend existing format specifiers.
349 Implemented by Ulrich Drepper.
351 * Handling for group shadow files has been added.
352 Implemented by Ulrich Drepper.
354 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
355 servers (the case, e.g., for some people using the built-in DNS
356 server in ADSL modems/routers). There is a once-per-process timeout
357 in case of a broken server. To avoid it, users can run nscd or put
358 'options single-request' in /etc/resolv.conf.
359 Implemented by Ulrich Drepper.
363 * The following bugs are resolved with this release:
365 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
366 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
367 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
368 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
369 6968, 6974, 6980, 6995, 7008, 7009, 7029
371 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
372 up at the same time. Implemented by Ulrich Drepper.
374 * TLS descriptors for LD and GD on x86 and x86-64.
375 Implemented by Alexandre Oliva.
377 * getaddrinfo now handles DCCP and UDPlite.
378 Implemented by Ulrich Drepper.
380 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
381 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
382 Implemented by Ulrich Drepper.
384 * New implementation of memmem, strstr, and strcasestr which is O(n).
385 Implemented by Eric Blake.
387 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
389 * Implement "e" option for popen to open file descriptor with the
390 close-on-exec flag set. Implemented by Ulrich Drepper.
392 * Implement "b" mode for fmemopen. In this mode writes writes don't
393 implicitly add a NUL byte and seeks from the end of the buffer really
394 use the buffer end, not the string length as the basis.
395 Implemented by Ulrich Drepper.
397 * Many functions, exported and internal, now atomically set the close-on-exec
398 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
400 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
402 Implemented by Pravin Satpute.
404 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
408 * The following bugs are resolved with this release:
410 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
411 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
412 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
413 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
414 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
415 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
416 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
418 * New locales: bo_CN, bo_IN, shs_CA.
420 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
422 * Sorting rules for some Indian languages (Devanagari and Gujarati).
423 Implemented by Pravin Satpute.
425 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
427 * nscd caches now all timeouts for DNS entries
428 Implemented by Ulrich Drepper.
430 * nscd is more efficient and wakes up less often.
431 Implemented by Ulrich Drepper.
433 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
434 vdprintf, and obstack_vprintf.
435 Implemented by Jakub Jelinek.
437 * Faster memset for x86-64.
438 Implemented by Harsha Jagasia and H.J. Lu.
440 * Faster memcpy on x86.
441 Implemented by Ulrich Drepper.
443 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
444 Implemented by Ulrich Drepper.
446 * Faster sqrt and sqrtf implemention for some PPC variants.
447 Implemented by Steven Munroe.
451 * The following bugs are resolved with this release:
453 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
454 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
455 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
456 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
457 5071, 5103, 5104, 5112, 5113, 5184, 5186
459 * More checking functions: fread, fread_unlocked, open*, mq_open.
460 Implemented by Jakub Jelinek and Ulrich Drepper.
462 * Extend fortification to C++. Implemented by Jakub Jelinek.
464 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
465 by not recognizing 'a' as a modifier when those specs are requested.
466 Implemented by Jakub Jelinek.
468 * PPC optimizations to math and string functions.
469 Implemented by Steven Munroe.
471 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
472 options to be passed. Implemented by Ulrich Drepper.
474 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
476 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
477 Implemented by Ulrich Drepper.
479 * Handle private futexes in the NPTL implementation.
480 Implemented by Jakub Jelinek and Ulrich Drepper.
482 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
483 Implemented by Roland McGrath and Ulrich Drepper.
485 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
487 * SHA-256 and SHA-512 based password encryption.
488 Implemented by Ulrich Drepper.
490 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
491 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
494 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
495 Implemented by Ulrich Drepper.
499 * The following bugs are resolved with this release:
501 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
502 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
503 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
504 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
505 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
506 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
507 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
510 * New Linux interfaces: epoll_pwait, sched_getcpu.
512 * New generic interfaces: strerror_l.
514 * nscd can now cache the services database. Implemented by Ulrich Drepper.
518 * The following bugs are resolved with this release:
520 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
521 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
522 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
523 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
524 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
525 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
526 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
527 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
528 3225, 3251, 3252, 3253, 3273
530 * For Linux, the sorting of addresses returned by getaddrinfo now also
531 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
532 Implemented by Ulrich Drepper.
534 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
535 Implemented by Ulrich Drepper.
537 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
539 * New iconv module for MIK. Contributed by Alexander Shopov.
541 * For sites with broken group and/or passwd database, the auto-propagate
542 option of nscd can prevent creating ID lookup entries from the results
543 of a name lookup and vice versa. This usually is no problem but some
544 site might have problems with the default behavior.
545 Implemented by Ulrich Drepper.
547 * Iterating over entire database in NIS can be slow. With the
548 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
549 to trade time for memory. The entire database will be read at once.
550 Implemented by Ulrich Drepper.
552 * The interfaces introduced in RFC 3542 have been implemented by
555 * Support for the new ELF hash table format was added by Ulrich Drepper.
557 * Support for priority inheritance mutexes added by Jakub Jelinek and
560 * Support for priority protected mutexes added by Jakub Jelinek.
562 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
563 or_IN, csb_PL, fy_NL, sr_ME.
567 * More overflow detection functions.
569 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
570 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
572 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
573 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
574 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
575 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
576 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
577 by Masahide Washizawa.
579 * It is now possible to install audit libraries for the dynamic linker using
580 LD_AUDIT. Implemented by Ulrich Drepper.
582 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
583 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
584 For a libc and libpthread that works well on Linux 2.4 kernels, we
585 recommend using the stable 2.3 branch.
587 * The new function open_wmemstream acts like open_memstream,
588 but uses a wchar_t wide character buffer.
590 * The new function ppoll is an improved version of poll, similar to pselect.
592 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
593 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
594 renameat, unlinkat, linkat, symlinkat, readlinkat.
596 * New Linux kernel system calls: unshare,
597 inotify_init, inotify_add_watch, inotify_rm_watch.
599 * The euidaccess function is now also known by the alias eaccess,
600 for compatibility with some other systems.
602 * Timezone data updated to 2006b version.
606 * The following bugs are resolved with this release:
608 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
609 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
610 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
611 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
612 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
613 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
615 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
617 * As of this release, GCC 4 can be used to compile the C Library.
619 * Timezone data updated to 2005m version.
623 * The following bugs are resolved with this release:
625 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
626 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
627 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
628 777, 787, 821, 822, 823, 825
630 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
634 * Support for RFC 3678. Real implementations exist only for Linux so far.
635 Implemented by Ulrich Drepper.
637 * nscd can now cache entries persistently. Expiring entries are reloaded.
638 For speedups the cache can be shared in memory with client processes.
639 Implemented by Ulrich Drepper.
641 * nscd can now perform SELinux checks.
642 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
644 * getaddrinfo queries are now cached. Canonical name lookup is performed
646 Implemented by Ulrich Drepper.
648 * The nothrow function attribute is used when headers are used by gcc when
649 compiling C code. This can avoid significant amounts of exception
652 * The malloc functions perform more error checking and are stricter when
653 it comes to reacting on errors. The default action is to terminate
654 the process after showing an error message. Implemented by Ulrich Drepper.
656 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
657 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
659 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
660 namespaces using the new function dlmopen(). This feature is of course,
661 like most other dynamic loading functionality, not available in statically
662 linked applications. Implemented by Ulrich Drepper.
664 * Low-overhead boundary checking variants of string and some stdio functions
665 were added. These are to be used in conjunction with a gcc patch by
666 Jakub Jelinek which adds calls to these functions if possible.
667 Implemented by Jakub Jelinek and Ulrich Drepper.
669 * Old code for several operating systems and machine architectures that
670 have not been in working condition in a long time have been removed from
671 the main source tree maintained by the GNU C Library's maintainers.
672 These files are now reside in the separate `ports' source module
673 that is usable as an add-on when building the library.
677 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
678 interrogate the dynamic linker, compatible with the Solaris interface.
680 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
681 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
683 * getifaddrs now uses the netlink interface on Linux to get its information.
684 Implemented by Thorsten Kukuk.
686 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
687 Implemented by Ulrich Drepper.
689 * support for non-executable stacks on x86 has been added. Changes mostly
692 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
695 * getaddrinfo now performs destination address selection according to
700 * Thread-safe interfaces for many functions that access locale data
701 were added in version 2.3, but these features were omitted from NEWS.
702 Many functions have variants with an `_l' suffix that take a `locale_t'
703 object as a parameter rather than consulting the current locale.
704 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
705 create and maintain `locale_t' objects. Additionally, the new function
706 `uselocale' sets "the current locale" (as used by functions not so
707 parameterized) set for an individual thread. These features were added
708 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
710 * The functions getresuid, getresgid, setresuid, and setresgid, which
711 have long been available on Linux, are now declared in <unistd.h>
712 and are now also available on the Hurd.
714 * ELF thread-local storage support (TLS) now works on x86-64.
716 * The new dynamic string token $LIB is expanded in shared library names.
717 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
719 * Aldy Hernandez contributed complete software floating point support for
720 PowerPC machines with no FPU.
722 * fexecve is implemented on Linux.
724 * The `btowc' function should work at least twice as fast due to
725 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
727 * With approriate thread add-ons cancelable functions are now implemented
728 in libc.so as well. No need to call the function in libpthread. This
729 change allowed to finally disable the incorrect and expensive handling
730 of weak definition in ld.so.
732 * Yet more PLT entries in libc.so have been removed. We finally arrived
733 at the bare minimum. Startup times improved appropriately.
735 * Support for the new Linux/x86 system call interface was added. The
736 AT_SYSINFO auxiliary vector entry is recognized and handled.
740 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
743 * iconv (the program and the interface) now accepts empty names (excluding
744 options like //TRANSLIT) to mean "use charset of current locale".
746 * localedef can now transliterate characters in strings which are not in
747 the provided charmap. The information from the input locale is used.
749 * Prelinking support was added for ELF targets. This requires additional
750 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
752 * Read-only stdio streams now use mmap to speed up operation by eliminating
753 copying and buffer underflows. To use add 'm' to the mode string of
754 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
756 * The malloc functions were completely rewritten by Wolfram Gloger based
757 on Doug Lea's malloc-2.7.0.c.
759 * Isamu Hasegawa contributed a completely new and POSIX-conformant
760 implementation of regex.
762 * Bruno Haible upgraded the iconv and locale implementation to support
765 * Contents of the LC_* and LANG environment variables in the CEN style are
766 not recognized anymore. It never was used. Change by Ulrich Drepper.
768 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
769 thread-local storage (TLS) ABI on some platforms.
770 Changes by Ulrich Drepper. SH support by Kaz Kojima.
772 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
773 EUC-JISX0213, and TSCII.
775 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
776 BSD-compatible interface for getting all network interface addresses.
777 Implementation for IPv4 by Roland McGrath.
779 * Loading of locale data is faster due to the introduction of a locale
780 archive. Implemented by Roland McGrath and Ulrich Drepper.
782 * Startup times are significantly reduced by not using exported functions
783 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
786 * Steven Munroe contributed a port to PowerPC64/Linux.
790 * The Hurd now uses the GNU libio implementation of stdio rather than the
791 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
793 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
794 with the same behavior as the Linux system call of the same name.
798 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
799 128-bit long double format.
801 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
802 IBM1161, and IBM1162 charsets.
804 * Andreas Jaeger contributed a port to x86-64/Linux.
806 * Peter Bruin contributed a port to PowerPC/Hurd.
808 * libc functions using I/O streams now can handle wide-oriented streams
811 * optimizations in the dynamic linker. Binaries created by recent binutils
812 versions start up quicker due to reduced time spent on relocations.
814 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
818 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
819 asinh, atanh, j0 for the 128-bit long double format.
821 * Bruno Haible updated all the code handling Unicode in some form to
824 * Speed of regex for single-byte locales is back to previous levels.
825 Patch by Isamu Hasegawa.
827 * Alpha, SPARC, and IA-64 now also using floating stacks.
829 * Startup time of internationalized applications greatly improved through
830 iconv cache. Use iconvconfig to generate the cache file.
831 Contributed by Ulrich Drepper.
833 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
834 severe performance problems. Patch by David Mosberger.
836 * The Hurd port got a lot more functionality like AIO, various stdio
837 extensions, etc. Mainly done by Roland McGrath.
839 * mtrace can now lookup symbols in shared libraries.
843 * Intel's IA-64 math library is largely integrated. It provides fast and
844 accurate implementatations for most basic and standard math functions
845 in float, double, and long double format.
847 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
848 and asin for the 96-bit long double format and asin, log, tan for the
849 128-bit long double format.
851 * The beginning of a last-bit accurate math library by IBM Haifa were added.
852 The basic double functions exist today. Contributed by Abraham Ziv
853 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
854 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
856 * An asynchronous name lookup library was added. The interface is designed
857 after POSIX AIO. The proposal was circulated beforehand to get comments.
858 No negative ones came in. Implemented by Ulrich Drepper.
860 * Port to S390/64bit contributed by Martin Schwidefsky
861 <schwidefsky@de.ibm.com>.
863 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
864 of functions for Linux/IA-64.
866 * The RPC code is now thread safe. Threads can now use the same service
867 of different services at the same time. Patch by Eric Norum
868 <eric.norum@usask.ca> with some help by Ulrich Drepper.
870 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
871 family of functions for Linux/S390.
873 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
874 of functions for Linux/x86.
876 * Port to Linux/CRIS contributed by Axis Communications.
880 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
881 we can now check for namespace violations and missing declarations. The
882 result is that almost all headers are now Unix-compliant (as defined in
883 the upcoming XPG6). The negative side is that some programs might need
884 corrections, too, if they depend on the incorrect form of the headers in
885 previous versions which defined too many symbols and included too many
888 * regex now handles multibyte character sets correctly.
889 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
891 * iconv (the program) does now conform to the upcoming XPG6 and handles
892 charmaps. Instead of the charset names the path of charmaps can be
893 provided and the conversion happens based on this data.
894 Contributed by Ulrich Drepper.
896 * The locale program now provides detailed information about the installed
901 only lists the names of the supported locales
905 provides details such as country, language, and codeset name.
906 Contributed by Ulrich Drepper.
910 * The gencat program now parses the input file according to the charset
911 selected by the LC_CTYPE category. This is important for stateful
912 character sets. To make generating catalogs easier there is a way
913 to overwrite the charset selected by the locale: before the first
914 message or $ quote line the catalog can contain a line like
918 to select the charset (ISO-8859-2 in this case).
920 Implemented by Shinya Hanataka and Ulrich Drepper.
922 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
923 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
924 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
926 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
927 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
929 * The LANGUAGE environment variable is now ignored unless the locale is
930 changed from the default "C" locale.
932 * The usual bug fixes.
936 * Greg McGary added runtime support for bounds checking using gcc's
937 new -fbounded-pointers option. ix86 target is complete. PowerPC
940 * Thorsten Kukuk added secure mode support to nscd.
942 * The Berkeley db libraries have been removed.
944 Related, the nss_db module is now in a separate package since it
945 obviously requires a database library being available.
947 * Wide character I/O streams implemented by Ulrich Drepper.
949 * Functions from the extended socket API added by Ulrich Drepper.
951 * Functions feenableexcept and fedisableexcept to control the
952 behaviour of individual exceptions have been added by Andreas Jaeger.
954 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
956 * The resolver code has been updated from bind 8.2.3-T5B which supports
957 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
960 This change could in some situations effect backward compatibility. Since
961 now `_res' is a thread-local instead of a global variable, modifying it
962 in one thread does not have any effect in other threads.
964 The resolver library was also extended to allow IPv6 as the transport
965 protocol for the requests. This work was done by Stig Venaas.
967 * Compatibility code for K&R C compilers has been removed from the
968 header files. A ISO C compiler is needed to use the library
969 (conforming to either C89 or C99 standard).
971 * Complete rewrite of the localedef program to support multibyte character
972 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
973 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
974 Implemented by Ulrich Drepper.
976 Bruno Haible significantly improved the generation and use of the data
977 structures for the wide character tables.
979 * Plural handling in gettext implemented by Ulrich Drepper.
981 * The utmp daemon has been removed.
983 * The port to MIPS-Linux has been finished by Andreas Jaeger.
985 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
988 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
990 * POSIX barriers implemented by Kaz Kylheku.
992 * POSIX spawn function family implemented by Ulrich Drepper.
994 * POSIX spinlocks are now available.
996 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
998 * the configure option --enable-kernel=X.Y.Z allows to strip out
999 compatibility for kernel versions before X.Y.Z. This is currently only
1000 implemented for Linux.
1002 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1003 field sin6_scope_id. This means that all programs using IPv6 should be
1004 recompiled. Don't expect binary compatibility with previous glibc
1007 * various conversion modules for IBM character sets contributed by
1010 * IA-64 port by Jes Sorensen and HJ Lu.
1024 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1026 * New xdr functions are added; some rpc functions are now 64bit clean.
1028 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1030 * Fixed known incompatibilities with glibc 2.0.
1032 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1034 * Optimized a number of functions (especially the ELF dynamic loader).
1036 * Update timezone data files.
1038 * lots of charmaps corrections
1040 * some new locale definitions and charmaps
1045 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1046 conform to POSIX member type requirements. Symbol versions have been
1047 adjusted as needed within the library, and for direct use by applications,
1048 but there is potential for problems if third-party libraries use
1049 struct timeval as part of their interface. This does not present
1050 a problem for X and other "essential" system libraries.
1052 * An additional locale model to support C++ Standard Library locale
1053 model and probably more was implemented by Ulrich Drepper.
1055 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1058 * Miles Bader provided the `argp' function family to support hierachical
1059 command line argument parsing, layered on top of getopt.
1061 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1063 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1066 * scanf recognizes the %a and %A format for scanning floating point numbers.
1068 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1069 information and interfaces for the available integer types.
1071 * about 130 new math functions were added to implement the ISO C9x math
1074 * the new header <complex.h> contains definitions of the complex math
1075 functions from ISO C 9X.
1077 * the new header <tgmath.h> defines generic macros to use complex or
1078 real valued functions.
1080 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1082 * Andreas Jaeger provided a test suite for the math library.
1084 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1086 * Ulrich Drepper added character set conversion functions (iconv).
1088 * Optimized string functions have been added.
1090 * The localedata addon is now part of glibc.
1092 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1094 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1095 daemon for NSS (nscd).
1097 Missing a better place here are some numbers on improvements. Under
1098 Linux 2.1.125 un-tar-ing the kernel sources takes
1102 using local files 12.19s 6.88s 22.91s
1104 using NIS 13.92s 8.91s 26.34s
1106 using NIS & nscd 10.37s 7.34s 25.30s
1108 using NIS+ 27.57s 30.37s 640.46s
1110 using NIS+ & nscd 10.25s 7.83s 26.51s
1112 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1114 Keep in mind that non-namelookup related operations dominate above times.
1115 It was just a common complain that using NIS+ unpacking the kernel is
1118 [1] The old nscd implementation is not available anymore since it was
1119 distributed with glibc up to version 2.0.98 and thus is now replaced.
1121 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1123 * Mark Kettenis provided a Hesiod NSS module.
1125 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1126 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1128 * rcmd can now handle netgroups (Dick Streefland).
1130 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1133 * Support for the IPv6 protocol has been added to the socket API, as per the
1134 latest draft standards.
1136 * Support for Linux 2.2 has been added.
1138 * Interface changes relative to the latest 2.0.x release:
1139 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1140 addseverity NEW: Unix98
1141 alphasort64 NEW: LFS
1142 argp_err_exit_status NEW: argp, GNU ext
1143 argp_error NEW: argp, GNU ext
1144 argp_failure NEW: argp, GNU ext
1145 argp_help NEW: argp, GNU ext
1146 argp_parse NEW: argp, GNU ext
1147 argp_program_bug_address NEW: argp, GNU ext
1148 argp_program_version NEW: argp, GNU ext
1149 argp_program_version_hook NEW: argp, GNU ext
1150 argp_state_help NEW: argp, GNU ext
1151 argp_usage NEW: argp, GNU ext
1152 authdes_create NEW: Secure RPC
1153 authdes_getucred NEW: Secure RPC
1154 authdes_pk_create NEW: Secure RPC
1155 backtrace NEW: GNU ext.
1156 backtrace_symbols NEW: GNU ext.
1157 backtrace_symbols_fd NEW: GNU ext.
1159 cacosf NEW: ISO C 9x
1160 cacosh NEW: ISO C 9x
1161 cacoshf NEW: ISO C 9x
1162 cacoshl NEW: ISO C 9x
1163 cacosl NEW: ISO C 9x
1170 casinf NEW: ISO C 9x
1171 casinh NEW: ISO C 9x
1172 casinhf NEW: ISO C 9x
1173 casinhl NEW: ISO C 9x
1174 casinl NEW: ISO C 9x
1176 catanf NEW: ISO C 9x
1177 catanh NEW: ISO C 9x
1178 catanhf NEW: ISO C 9x
1179 catanhl NEW: ISO C 9x
1180 catanl NEW: ISO C 9x
1181 cbc_crypt NEW: Secure RPC
1185 ccoshf NEW: ISO C 9x
1186 ccoshl NEW: ISO C 9x
1192 cimagf NEW: ISO C 9x
1193 cimagl NEW: ISO C 9x
1194 clearerr_locked REMOVED
1195 clntunix_create NEW: sunrpc ext
1197 clog10 NEW: ISO C 9x
1198 clog10f NEW: ISO C 9x
1199 clog10l NEW: ISO C 9x
1209 cprojf NEW: ISO C 9x
1210 cprojl NEW: ISO C 9x
1212 crealf NEW: ISO C 9x
1213 creall NEW: ISO C 9x
1218 csinhf NEW: ISO C 9x
1219 csinhl NEW: ISO C 9x
1222 csqrtf NEW: ISO C 9x
1223 csqrtl NEW: ISO C 9x
1227 ctanhf NEW: ISO C 9x
1228 ctanhl NEW: ISO C 9x
1230 des_setparity NEW: Secure RPC
1231 ecb_crypt NEW: Secure RPC
1232 endutxent NEW: Unix98
1234 exp10f NEW: ISO C 9x
1235 exp10l NEW: ISO C 9x
1239 fattach NEW: STREAMS
1240 fdetach NEW: STREAMS
1244 feclearexcept NEW: ISO C 9x
1245 fegetenv NEW: ISO C 9x
1246 fegetexceptflag NEW: ISO C 9x
1247 fegetround NEW: ISO C 9x
1248 feholdexcept NEW: ISO C 9x
1250 feraiseexcept NEW: ISO C 9x
1251 ferror_locked REMOVED
1252 fesetenv NEW: ISO C 9x
1253 fesetexceptflag NEW: ISO C 9x
1254 fesetround NEW: ISO C 9x
1255 fetestexcept NEW: ISO C 9x
1256 feupdateenv NEW: ISO C 9x
1257 fflush_locked REMOVED
1261 fgets_unlocked NEW: GNU ext.
1262 fileno_locked REMOVED
1274 fputc_locked REMOVED
1275 fputs_unlocked NEW: GNU ext.
1276 fread_unlocked NEW: GNU ext.
1281 fstatvfs NEW: Unix98
1285 ftruncate64 NEW: LFS
1287 fwrite_unlocked NEW: GNU ext.
1288 gai_strerror NEW: IPv6
1292 getchar_locked REMOVED
1294 getdate_err NEW: Unix98
1295 getdate_r NEW: GNU ext.
1297 getnameinfo NEW: IPv6
1298 getnetname NEW: Secure RPC
1299 getpmsg NEW: STREAMS
1300 getpt NEW: Unix98 PTY
1301 getrlimit64 NEW: LFS
1302 getutxent NEW: Unix98
1303 getutxid NEW: Unix98
1304 getutxline NEW: Unix98
1305 glob64 NEW: GNU ext.
1306 globfree64 NEW: GNU ext.
1307 gnu_get_libc_release NEW: GNU ext.
1308 gnu_get_libc_version NEW: GNU ext.
1309 grantpt NEW: Unix98 PTY
1310 host2netname NEW: Secure RPC
1312 iconv_close NEW: iconv
1313 iconv_open NEW: iconv
1314 if_freenameindex NEW: IPv6
1315 if_indextoname NEW: IPv6
1316 if_nameindex NEW: IPv6
1317 if_nametoindex NEW: IPv6
1318 in6addr_any NEW: IPv6
1319 in6addr_loopback NEW: IPv6
1320 inet6_isipv4mapped NEW: IPv6
1321 isastream NEW: STREAMS
1322 iswblank NEW: GNU ext.
1323 key_decryptsession NEW: Secure RPC
1324 key_decryptsession_pk NEW: Secure RPC
1325 key_encryptsession NEW: Secure RPC
1326 key_encryptsession_pk NEW: Secure RPC
1327 key_gendes NEW: Secure RPC
1328 key_get_conv NEW: Secure RPC
1329 key_secretkey_is_set NEW: Secure RPC
1330 key_setnet NEW: Secure RPC
1331 key_setsecret NEW: Secure RPC
1332 llrint NEW: ISO C 9x
1333 llrintf NEW: ISO C 9x
1334 llrintl NEW: ISO C 9x
1335 llround NEW: ISO C 9x
1336 llroundf NEW: ISO C 9x
1337 llroundl NEW: ISO C 9x
1342 lrintf NEW: ISO C 9x
1343 lrintl NEW: ISO C 9x
1344 lround NEW: ISO C 9x
1345 lroundf NEW: ISO C 9x
1346 lroundl NEW: ISO C 9x
1348 makecontext NEW: Unix98
1349 mempcpy NEW: GNU ext.
1352 modify_ldt NEW: kernel
1356 nearbyint NEW: ISO C 9x
1357 nearbyintf NEW: ISO C 9x
1358 nearbyintl NEW: ISO C 9x
1359 netname2host NEW: Secure RPC
1360 netname2user NEW: Secure RPC
1361 nexttoward NEW: ISO C 9x
1362 nexttowardf NEW: ISO C 9x
1363 nexttowardl NEW: ISO C 9x
1367 passwd2des NEW: Secure RPC
1369 pow10f NEW: GNU ext.
1370 pow10l NEW: GNU ext.
1373 printf_size NEW: GNU ext.
1374 printf_size_info NEW: GNU ext.
1375 profil_counter REMOVED
1376 pthread_mutexattr_getkind_np REPLACED
1377 pthread_mutexattr_setkind_np REPLACED
1378 ptsname NEW: Unix98 PTY
1379 ptsname_r NEW: Unix98 PTY
1381 putchar_locked REMOVED
1382 putgrent NEW: GNU ext.
1384 putpmsg NEW: STREAMS
1385 pututxline NEW: Unix98
1389 readdir64_r NEW: LFS
1390 remquo NEW: ISO C 9x
1391 remquof NEW: ISO C 9x
1392 remquol NEW: ISO C 9x
1394 roundf NEW: ISO C 9x
1395 roundl NEW: ISO C 9x
1397 scalbln NEW: ISO C 9x
1398 scalblnf NEW: ISO C 9x
1399 scalblnl NEW: ISO C 9x
1401 sendfile NEW: kernel
1402 setcontext NEW: Unix98
1403 setrlimit64 NEW: LFS
1404 setutxent NEW: Unix98
1406 sigignore NEW: Unix98
1407 sigqueue NEW: POSIX.1b
1408 sigrelse NEW: Unix98
1409 sigset NEW: POSIX.1b
1410 sigtimedwait NEW: POSIX.1b
1411 sigwaitinfo NEW: POSIX.1b
1412 sincos NEW: GNU ext.
1413 sincosf NEW: GNU ext.
1414 sincosl NEW: GNU ext.
1418 strcasestr NEW: GNU ext.
1419 strtoimax NEW: ISO C 9x
1420 strtoumax NEW: ISO C 9x
1421 strverscmp NEW: GNU ext.
1422 svcauthdes_stats NEW: Secure RPC
1423 svcunix_create NEW: sunrpc etx
1424 svcunixfd_create NEW: sunrpc ext
1425 swapcontext NEW: Unix98
1426 tcgetsid NEW: Unix98 PTY
1427 tdestroy NEW: GNU ext.
1428 tgamma NEW: ISO C 9x
1429 tgammaf NEW: ISO C 9x
1430 tgammal NEW: ISO C 9x
1434 truncf NEW: ISO C 9x
1435 truncl NEW: ISO C 9x
1437 unlockpt NEW: Unix98 PTY
1438 updwtmpx NEW: Unix98
1439 user2netname NEW: Secure RPC
1440 utmpxname NEW: Unix98
1441 versionsort NEW: GNU ext.
1442 versionsort64 NEW: GNU ext.
1444 wcscasecmp NEW: GNU ext.
1445 wcsncasecmp NEW: GNU ext.
1446 wcsnlen NEW: GNU ext.
1447 wcstoimax NEW: ISO C 9x
1448 wcstoll NEW: ISO C 9x
1449 wcstoull NEW: ISO C 9x
1450 wcstoumax NEW: ISO C 9x
1452 wordexp NEW: POSIX.2
1453 wordfree NEW: POSIX.2
1454 write_profiling REMOVED
1455 xdecrypt NEW: Secure RPC
1456 xdr_authdes_cred NEW: Secure RPC
1457 xdr_authdes_verf NEW: Secure RPC
1458 xdr_cryptkeyarg NEW: Secure RPC
1459 xdr_cryptkeyarg2 NEW: Secure RPC
1460 xdr_cryptkeyres NEW: Secure RPC
1461 xdr_getcredres NEW: Secure RPC
1462 xdr_key_netstarg NEW: Secure RPC
1463 xdr_key_netstres NEW: Secure RPC
1464 xdr_keybuf NEW: Secure RPC
1465 xdr_keystatus NEW: Secure RPC
1466 xdr_netnamestr NEW: Secure RPC
1467 xdr_sizeof NEW: Secure RPC
1468 xdr_unixcred NEW: sunrpc ext
1469 xencrypt NEW: Secure RPC
1470 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1481 * inet_ntoa is thread-safe
1483 * updwtmp is moved from libutil to libc
1485 * rewrite of cbrt function
1487 * update of timezone data
1501 * add atoll function
1503 * fix complex problems in Berkeley DB code
1505 * fix math functions
1509 * fixed lots of header problems (especially Linux/GNU specific)
1511 * dynamic loader preserves all registers
1513 * Roland McGrath provided support for handling of auxiliary objects in
1514 the ELF dynamic loader.
1516 * support for parallel builds is improved
1520 * GNU extensions are no longer declared by default. To enable them you
1521 must define the macro `_GNU_SOURCE' in your program or compile with
1524 * The library has changed from using GNU ld symbol aliases to using weak
1525 symbols where available. The ELF object file format supports weak
1526 symbols; GNU ld also supports weak symbols in the a.out format. (There
1527 is also now support for other GNU ld extensions in ELF. Use the
1528 `--with-elf' option to configure to indicate you have ELF, and
1529 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1530 of many files which contained only symbol aliases, reducing the size of
1531 the source and the compiled library; many other files were renamed to
1532 less cryptic names previously occupied by the symbol alias files.
1533 There is a new header file <elf.h> for programs which operate on
1534 files in the ELF format.
1536 * Converted to Autoconf version 2, so `configure' has more options.
1537 Run `configure --help' to see the details.
1539 * The library can now be configured to build profiling, highly-optimized
1540 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1541 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1542 `configure' enable building these extra libraries. The shared library is
1543 built by default when using both ELF and GNU ld. When shared libraries
1544 are enabled, the new library `-ldl' is available for arbitrary run-time
1545 loading of shared objects; its interface is defined in <dlfcn.h>. The
1546 new header file <link.h> gives access to the internals of the run-time
1547 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1548 application of same name on other systems and it provides information
1549 about dynamically linked binaries.
1551 * The C library now provides the run-time support code for profiling
1552 executables compiled with `-pg'. Programs can control the profiling code
1553 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1554 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1555 the support for this file format was contributed by David Mosberger-Tang.
1557 * The math code has been replaced with a math library based on fdlibm from
1558 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1559 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1560 functions. The math functions now reside in a separate library, so
1561 programs using them will need to use `-lm' their linking commands.
1563 * John C. Bowman contributed optimized ix87 assembler inline functions.
1565 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1566 mechanism similar to that found in Solaris 2. This is now used for the
1567 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1568 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1569 file controls what services are used for each individual database. This
1570 works by loading shared libraries with names specified in `nsswitch.conf',
1571 so service modules can be changed or added at any time without even
1572 relinking any program. Currently there are the file, db, and NIS based
1573 NSS services available.
1575 * The new functions `strtoq' and `strtouq' parse integer values from
1576 strings, like `strtol' and `strtoul', but they return `long long int' and
1577 `unsigned long long int' values, respectively (64-bit quantities).
1579 * The new functions `strtof' and `strtold' parse floating-point values from
1580 strings, like `strtod', but they return `float' and `long double' values,
1581 respectively (on some machines `double' and `long double' are the same).
1583 * Ulrich Drepper has contributed new implementations of the floating-point
1584 printing and reading code used in the `printf' family of functions and
1585 `strtod', `strtof', and `strtold'. These new functions are perfectly
1586 accurate, and much faster than the old ones.
1588 * The implementation of the POSIX locale model was completely rewritten by
1589 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1590 to compile the POSIX locale definition.
1592 * The former dummy implementations of the strcoll and strxfrm function are
1593 now replaced by fully functional code contributed by Ulrich Drepper. The
1594 collation information comes from the POSIX locale definitions.
1596 * The new header <langinfo.h> defines an interface for accessing
1597 various locale-dependent data (using the locale chosen with `setlocale').
1599 * Ulrich Drepper has contributed a new suite of functions for operation on
1600 wide-character and multibyte-character strings, in <wchar.h>;
1601 and classification and case conversion of wide characters, in <wctype.h>.
1602 These new functions are conforming to the ISO C, Amendement 1 specification.
1604 * There is now a second implementation of the standard I/O library available.
1605 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1606 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1608 * You can now use positional parameter specifications in format strings
1609 for the `printf' and `scanf' families of functions. For example,
1610 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1611 ``Number 6, Mr Jones''. This is mainly useful when providing different
1612 format strings for different languages, whose grammars may dictate
1613 different orderings of the values being printed. To support this
1614 feature, the interface for `register_printf_handler' has changed; see
1615 the header file <printf.h> for details.
1617 * The `printf' and `scanf' families of functions now understand a new
1618 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1619 to group numbers as indicated by the locale; for `scanf' and friends, this
1620 says to accept as valid only a number with all the proper grouping
1621 separators in the right places. In the default "C" locale, numbers are
1622 not grouped; but locales for specific countries will define the usual
1623 conventions (i.e. separate thousands with `,' in the US locale).
1625 * The pgrp functions have been regularized, slightly incompatibly but much
1626 less confusingly. The core functions are now `getpgid' and `setpgid',
1627 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1628 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1629 provided for compatibility. There is no longer an incompatible `getpgrp'
1630 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1632 * The new header file <fts.h> and suite of functions simplify programs that
1633 operate on directory trees. This code comes from 4.4 BSD.
1635 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1636 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1637 NSS scheme used in glibc.
1639 * There is a new malloc debugging hook `__memalign_hook'.
1641 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1642 `unsigned int' in <sys/types.h>. These are for compatibility only and
1643 their use is discouraged.
1645 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1646 done differently, so that it works even without GNU ld.
1648 * New function `euidaccess' checks allowed access to a file like `access',
1649 but using the effective IDs instead of the real IDs.
1651 * The time zone data files have been updated for the latest and greatest
1652 local time conventions of the countries of the world.
1654 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1657 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1658 for formatting floating-point numbers. They are provided only for
1659 compatibility; new programs should use `sprintf' instead. There are
1660 also equivalent function for the `long double' floating-point type and
1661 all functions also exist in a reentrant form.
1663 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1664 functions for maintaining the login-record files (primarily of use to
1665 system programs such as `login'), and convenient functions for
1666 allocating and initializing a pseudo-terminal (pty) device.
1668 * Ulrich Drepper has contributed new support for System V style
1669 shared memory and IPC on systems that support it.
1671 * Ulrich Drepper has contributed several miscellaneous new functions found
1672 in System V: The `hsearch' family of functions provide an effective
1673 implementation of hash tables; `a64l' and `l64a' provide a very simple
1674 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1677 * Ulrich Drepper has contributed new reentrant counterparts for the
1678 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1680 * Ulrich Drepper has contributed new, highly-optimized versions of several
1681 string functions for the i486/Pentium family of processors.
1683 * Ulrich Drepper has updated the Linux-specific code, based largely
1684 on work done in Hongjiu Lu's version of GNU libc for Linux.
1685 The GNU library now supports Linux versions 2.0.10 and later,
1686 using the ELF object file format (i[3456]86-*-linux).
1688 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1690 * David Mosberger-Tang and Richard Henderson have ported the C library
1691 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1692 dynamic linking support for ELF/Alpha.
1694 * Richard Henderson contributed several Alpha optimized assembler function
1695 for arithmetic and string handling.
1697 * Ulrich Drepper has contributed a new set of message catalog functions to
1698 support multiple languages using the <libintl.h> interface, for use with
1699 his new package GNU gettext. Translation volunteers have contributed
1700 catalogs of the library's messages in Spanish, German, and Korean.
1702 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1703 program and the `catgets' function for reading the catalog files it
1704 creates. (The <libintl.h> interface is preferred; we include the
1705 <nl_types.h> interface using `catgets' only for source compatibility with
1706 programs already written to use it.)
1708 * New header file <values.h> gives SVID-compatible names for <limits.h>
1711 * Various new macros, declarations, and small header files for compatibility
1714 * New function `group_member' is a convenient way to check if a process has
1715 a given effective group ID.
1717 * When using GCC 2.7 and later, the socket functions are now declared in a
1718 special way so that passing an argument of type `struct sockaddr_in *',
1719 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1720 `struct sockaddr *' type, does not generate a type-clash warning.
1722 * New function `error' declared in header file <error.h> is a convenient
1723 function for printing error messages and optionally exiting; this is the
1724 canonical function used in GNU programs. The new functions `err', `warn',
1725 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1726 doing the same thing.
1728 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1729 POSIX.2 `glob' function to do ~ and {...} expansion.
1731 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1732 `clearenv' which is used in POSIX.9 is also available.
1734 * New function `getsid' returns session ID number on systems that support it.
1736 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1737 files <db.h> and <mpool.h> provide a rich set of functions for several
1738 types of simple databases stored in memory and in files, and <ndbm.h> is
1739 an old `ndbm'-compatible interface using the `db' functions. Link with
1740 `-ldb' to get these functions.
1742 * New macro `strdupa' copies a string like `strdup', but uses local stack
1743 space from `alloca' instead of dynamic heap space from `malloc'.
1745 * New function `strnlen' is like `strlen' but searches only a given maximum
1746 number of characters for the null terminator. `stpncpy', `strndup' and
1747 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1750 * New function `statfs' in header <sys/statfs.h>.
1752 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1753 provide convenient functions for operating on blocks of null-terminated
1756 * A new suite of functions in <utmp.h> handle all the details of reading
1757 and writing the utmp file.
1759 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1762 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1763 completely POSIX compliant and also implemented the extended functionality
1764 to handle alternate digit representation and alternate era date formats.
1766 * Ulrich Drepper provided an implementation of the `strptime' function
1767 defined in XPG4.2 which transforms a string into a `struct tm' value.
1769 * Paul Eggert provided the tzselect shell script as part of the timezone
1770 code. The shell script makes it easy to select the correct timezone
1773 * The implementation of the malloc family of functions is completely replaced
1774 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1775 The implementation uses the mmap function (if available) and it is
1776 optimized for the use in multi threaded programs.
1778 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1779 functions. This new functionality is usable by specifying a special
1780 salt string and it is compatible with implementation on *BSD systems.
1782 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1783 `getsubopt' to handle second level command line options, `bsd_signal'
1784 to access BSD style `signal' functionality, the obsolete `regexp' style
1787 * the `lchown' function is available on system which support this
1790 * The implementation of the shadow password handling function was contributed
1793 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1795 * POSIX.1g support was added. The <sys/select.h> header is available,
1796 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1797 implementation of `getaddrinfo'.
1801 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1803 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1804 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1806 * The new function `daemon' from 4.4 BSD is useful for server programs that
1807 want to put themselves in the background.
1809 * Joel Sherrill has contributed support for several standalone boards that
1810 run without an operating system.
1812 * `printf', `scanf' and friends now accept a `q' type modifier for long
1813 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1815 * All of the code taken from BSD (notably most of the math and networking
1816 routines) has been updated from the BSD 4.4-Lite release.
1818 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1820 * The new functions `getdomainname' and `setdomainname' fetch or change the
1821 YP/NIS domain name. These are system calls which exist on systems which
1824 * The time zone data files have been updated for the latest international
1827 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1828 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1832 * The C library now includes support for Sun RPC, from Sun's free
1833 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1834 are included. (There is still no support for YP.)
1836 * Tom Quinn has contributed a port of the C library to SGI machines running
1837 Irix 4 (mips-sgi-irix4).
1839 * The new `lockf' function is a simplified interface to the locking
1840 facilities of `fcntl', included for compatibility.
1842 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1844 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1846 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1849 * The error message printed by `assert' for a failed assertion now includes
1850 the name of the program (if using GNU ld) and the name of the calling
1851 function (with versions of GCC that support this).
1853 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1855 * The library now includes the <sys/mman.h> header file and memory
1856 management functions `mmap', `munmap', `mprotect', `msync', and
1857 `madvise', on systems that support those facilities.
1859 * The interface for `mcheck' has changed slightly: the function called to
1860 abort the program when an allocation inconsistency is detected now takes
1861 an argument that indicates the type of failure. The new function
1862 `mprobe' lets you request a consistency check for a particular block at
1863 any time (checks are normally done only when you call `free' or `realloc'
1866 * It is now possible to easily cross-compile the C library, building on one
1867 system a library to run on another machine and/or operating system. All
1868 you need to do is set the variable `HOST_CC' in `configparms' to the
1869 native compiler for programs to run on the machine you are building on (a
1870 few generator programs are used on Unix systems); set `CC' to the
1873 * The new function `fexecve' (only implemented on the GNU system) executes
1874 a program file given a file descriptor already open on the file.
1878 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1879 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1881 * You can set the variable `libprefix' in `configparms' to specify a prefix
1882 to be prepended to installed library files; this makes it easy to install
1883 the GNU C library to be linked as `-lgnuc' or whatever.
1885 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1886 copies a limited number of characters from a string, and returns the
1887 address of the last character written.
1889 * You no longer need to check for whether the installed `stddef.h' is
1890 compatible with the GNU C library. configure now checks for you.
1892 * You can now define a per-stream `fileno' function to convert the
1893 stream's cookie into an integral file descriptor.
1895 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1896 allocates zero bytes of storage, and returns a unique pointer which
1897 you can pass to `realloc' or `free'. The behavior is undefined if
1898 you dereference this pointer.
1900 * The C library now runs on Sony NEWS m68k machines running either
1901 NewsOS 3 or NewsOS 4.
1903 * The new `syscall' function is a system-dependent primitive function
1904 for invoking system calls. It has the canonical behavior on Unix
1905 systems, including unreliable return values for some calls (such as
1906 `pipe', `fork' and `getppid').
1908 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1909 to `EAGAIN', which is the preferred name. On systems whose kernels
1910 use two distinct codes, the C library now translates EWOULDBLOCK to
1911 EAGAIN in every system call function.
1915 * The GNU C Library Reference Manual is now distributed with the library.
1916 `make dvi' will produce a DVI file of the printed manual.
1917 `make info' will produce Info files that you can read on line using C-h i
1918 in Emacs or the `info' program.
1919 Please send comments on the manual to bug-glibc-manual@gnu.org.
1921 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1923 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1925 * Jason Merrill has contributed a port to the Sequent Symmetry running
1926 Dynix version 3 (i386-sequent-dynix).
1928 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1929 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1931 * New function `memory_warnings' lets you arrange to get warnings when
1932 malloc is running out of memory to allocate, like Emacs gives you.
1934 * The C library now contains the relocating allocator used in Emacs 19 for
1935 its editing buffers. This allocator (ralloc) minimizes allocation
1936 overhead and fragmentation by moving allocated regions around whenever it
1937 needs to. You always refer to a ralloc'd region with a "handle" (a
1938 pointer to a pointer--an object of type `void **').
1940 * There is a new `printf' format: `%m' gives you the string corresponding
1941 to the error code in `errno'.
1943 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1944 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1945 pass, the `a' modifier says to fill in a `char **' you pass with a
1948 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1949 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1950 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1952 * `mkstemp' is a traditional Unix function to atomically create and open a
1953 uniquely-named temporary file.
1957 * The standard location for the file that says what the local timezone is
1958 has changed again. It is now `/usr/local/etc/localtime' (or more
1959 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1961 * The distribution no longer contains any files with names longer than 14
1964 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1965 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1967 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1971 * The configuration process has changed quite a bit. The `configure'
1972 script is now used just like the configuration scripts for other GNU
1973 packages. The `sysdeps' directory hierarchy is much rearranged.
1974 The file `INSTALL' explains the new scheme in detail.
1976 * The header files no longer need to be processed into ANSI C and
1977 traditional C versions. There is just one set of files to install, and
1978 it will work with ANSI or old C compilers (including `gcc -traditional').
1980 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1981 MIPS DECStation running Ultrix 4.
1983 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1984 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1985 made itself into a shared library.
1987 * Yet further improved support for the i386, running 4.3 BSD-like systems
1988 (such as Mach 3 with the Unix single-server), or System V.
1990 * New function `strncasecmp' to do case-insensitive string comparison
1991 with limited length.
1993 * New function `strsep' is a reentrant alternative to `strtok'.
1995 * New functions `scandir' and `alphasort' for searching directories.
1997 * New function `setenv' is a better interface to `putenv'.
1999 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2000 function for traversing a directory tree.
2002 * The GNU obstack package is now also part of the C library.
2003 The new function `open_obstack_stream' creates a stdio stream that
2004 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2005 formatted output directly to an obstack.
2007 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2008 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2010 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2012 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2013 things to your strings.
2015 * There are some new test programs: test-fseek, testmb, and testrand.
2017 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2018 These ports are not finished, but are a good starting place for really
2019 supporting those systems.
2021 * `/etc/localtime' is now the standard location for the file that says what
2022 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2023 This follows the general principle that `/etc' is the place for all local
2024 configuration files.
2026 * The C library header files now use `extern "C"' when used by the C++
2027 compiler, so the C library should now work with C++ code.
2029 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2030 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2033 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2034 function which uses the `merge sort' algorithm, and is said to be
2035 significantly faster than the old GNU `qsort' function. Merge sort is
2036 now the standard `qsort' function. The new algorithm can require a lot
2037 of temporary storage; so, the old sorting function is called when the
2038 required storage is not available.
2040 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2041 provides the Unix `crypt' function, plus some other entry points.
2043 * The code and header files taken from 4.4 BSD have been updated with the
2044 latest files released from Berkeley.
2046 ----------------------------------------------------------------------
2047 Copyright information:
2049 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
2051 Permission is granted to anyone to make or distribute verbatim copies
2052 of this document as received, in any medium, provided that the
2053 copyright notice and this permission notice are preserved,
2054 thus giving the recipient permission to redistribute in turn.
2056 Permission is granted to distribute modified versions
2057 of this document, or of portions of it,
2058 under the above conditions, provided also that they
2059 carry prominent notices stating who last changed them.
2062 version-control: never
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