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, 350, 369, 411, 706, 2074, 2541, 2547, 2548, 2551, 2552, 2553, 2554,
13 2562, 2563, 2565, 2566, 2576, 2636, 2678, 3335, 3866, 3868, 3976, 3992,
14 4026, 4108, 4596, 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649,
15 6730, 6770, 6884, 6890, 6894, 6895, 6907, 6911, 9739, 9902, 10110, 10135,
16 10140, 10153, 10210, 10254, 10346, 10545, 10716, 11174, 11322, 11365,
17 11451, 11494, 11521, 11959, 12047, 12340, 13058, 13525, 13526, 13527,
18 13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551, 13552, 13553,
19 13555, 13559, 13566, 13583, 13592, 13618, 13637, 13656, 13658, 13673,
20 13691, 13695, 13704, 13705, 13706, 13726, 13738, 13760, 13761, 13786,
21 13792, 13806, 13824, 13840, 13841, 13844, 13846, 13851, 13852, 13854,
22 13871, 13872, 13873, 13879, 13883, 13892, 13895, 13908, 13910, 13911,
23 13912, 13913, 13915, 13916, 13917, 13918, 13919, 13920, 13921, 13926,
24 13928, 13938, 13963, 13967
28 + define static_assert
32 + declare at_quick_exit and quick_exit also for ISO C11
34 + aligned_alloc. NB: The code is deliberately allows the size parameter
35 to not be a multiple of the alignment. This is a moronic requirement
36 in the standard but it is only a requirement on the caller, not the
41 + uchar.h support added
43 + CMPLX, CMPLXF, CMPLXL added
45 Implemented by Ulrich Drepper.
47 * Support for the IA-64 is removed and could live in ports.
49 * Remove support for anything but ELF binary format
51 * Checking versions of poll, ppoll added.
52 Implemented by Ulrich Drepper.
54 * More generic and 64-bit performance optimizations to math functions.
55 Implemented by Ulrich Drepper.
59 * The following bugs are resolved with this release:
61 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
62 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
63 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
64 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
65 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
66 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
67 13484, 13506, 13515, 13523, 13524, 13538, 13540
69 * New program pldd to list loaded object of a process
70 Implemented by Ulrich Drepper.
72 * Add nss_db support back to glibc. No more dependency on Berkeley db
73 and support for initgroups lookups.
74 Implemented by Ulrich Drepper.
76 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
79 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
82 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
84 Contributed by Liubov Dmitrieva.
86 * Optimized strchr and strrchr for SSE on x86-32.
87 Contributed by Liubov Dmitrieva.
89 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
90 for x86-64 and x86-32.
91 Contributed by Liubov Dmitrieva.
93 * New interfaces: scandirat, scandirat64
94 Implemented by Ulrich Drepper.
96 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
97 Implemented by Ulrich Drepper.
99 * nscd now also caches the netgroup database.
100 Implemented by Ulrich Drepper.
102 * Integrate libm with gcc's -ffinite-math-only option.
103 Implemented by Ulrich Drepper.
105 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
106 to math functions. Implemented by Ulrich Drepper.
108 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
109 Implemented by Ulrich Drepper.
111 * New Linux interfaces: process_vm_readv, process_vm_writev
113 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
114 Implemented by Ulrich Drepper.
116 * Optimized nearbyint and strcasecmp for PPC.
117 Implemented by Adhemerval Zanella.
119 * New locales: bho_IN, unm_US, es_CU, ta_LK
123 * The following bugs are resolved with this release:
125 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
126 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
127 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
128 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
129 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
130 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
131 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
132 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
133 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
134 12795, 12811, 12813, 12814, 12841
136 * The RPC implementation in libc is obsoleted. Old programs keep working
137 but new programs cannot be linked with the routines in libc anymore.
138 Programs in need of RPC functionality must be linked against TI-RPC.
139 The TI-RPC implementation is IPv6 enabled and there are other benefits.
141 Visible changes of this change include (obviously) the inability to link
142 programs using RPC functions without referencing the TI-RPC library and the
143 removal of the RPC headers from the glibc headers.
144 Implemented by Ulrich Drepper.
146 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
147 syncfs, setns, sendmmsg
149 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
150 yue_HK, lij_IT, mhr_RU
152 * New encodings: CP770, CP771, CP772, CP773, CP774
154 * New program sotruss to trace calls through PLTs
155 Implemented by Ulrich Drepper.
157 * The malloc hook implementation is marked deprecated and will be removed
158 from the default implementation in the next version. The design never
159 worked ever since the introduction of threads. Even programs which do
160 not create threads themselves can use multiple threads created internally.
164 * The following bugs are resolved with this release:
166 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
167 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
168 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
169 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
172 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
174 * POWER7 optimizations: memset, memcmp, strncmp
176 * New optimized string functions for x86-64: strnlen (SSE2),
177 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
178 Implemented by Ulrich Drepper.
182 * The following bugs are resolved with this release:
184 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
185 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
186 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
187 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
188 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
189 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
190 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
191 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
193 * New interfaces: pthread_getname_np, pthread_setname_np
195 * New Linux interface: recvmmsg
197 * STT_GNU_IFUNC implemented for Sparc by David Miller.
199 * The dynamic linker now recognizes supported ABI versions from the
200 EI_ABIVERSION field in the ELF header.
201 Implemented by Ulrich Drepper.
203 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
204 will not be used to fill in password fields in the passwd.byname replies.
205 Instead it is used to synthesize the shadow.byname table, should it be
206 missing. This is a useful mode in some installations involving Solaris.
207 Implemented by Ulrich Drepper.
209 * New locales: kok_IN, sq_MK, cv_RU
213 * The following bugs are resolved with this release:
215 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
216 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
217 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
218 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
219 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
220 10789, 10817, 10823, 10840, 10847
222 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
224 Implemented by Ulrich Drepper.
226 * Checking version of longjmp added that fails if an uninitialized stack
227 frame would be created. Implemented by Ulrich Drepper.
229 * STT_GNU_IFUNC is now supported in static executables.
230 Implemented by H.J. Lu.
232 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
234 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
235 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
236 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
237 Contributed by H.J. Lu.
239 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
240 Implemented by Ulrich Drepper.
242 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
244 Contributed by H.J. Lu.
246 * Support for fma instruction in AVX on x86-64.
247 Implemented by H.J. Lu and Ulrich Drepper.
249 * AVX support in x86-64 auditing support in ld.so.
250 Implemented by H.J. Lu.
252 * STB_GNU_UNIQUE support added.
253 Implemented by Ulrich Drepper.
255 * Implement second fallback mode for optimized DNS lookup for even more
256 broken environments. If two requests from the same port are not
257 handled correctly close the socket and open a new one before sending
258 the second request. The 'single-request-reopen' option in /etc/resolv.conf
259 can be used to select this mode right away, instead of rediscovering the
260 necessity is every process again.
261 Implemented by Ulrich Drepper.
263 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
264 Implemented by Adam Tkac.
266 * Optimized iconv conversions for S390x.
267 Implemented by Andreas Krebbel.
269 * Using condvars with PI mutexes is now more efficient due to kernel
270 support for requeueing to PI futexes. NPTL support added for x86-64.
271 Implemented by Ulrich Drepper.
273 * New locales: ps_AF, my_MM
277 * The following bugs are resolved with this release:
279 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
280 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
281 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
282 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
283 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
285 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
286 Implemented by Ulrich Drepper.
288 * New Linux interfaces: accept4, fallocate, fallocate64.
289 Implemented by Ulrich Drepper.
291 * Correct declarations of string function when used in C++ code. This
292 could lead to compile errors for invalid C++ code.
294 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
297 * New POSIX 2008 interface: psiginfo
298 Implemented by Ulrich Drepper.
300 * New ISO C++1x interfaces: quick_exit, at_quick_exit
301 Implemented by Ulrich Drepper.
303 * Support for selecting between multiple function definitions at runtime
304 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
306 * The libcrypt library can now use the hash function implementations in
307 NSS. Implemented by Ulrich Drepper.
309 * The malloc implementation can be compiled to be less memory efficient
310 but higher performing in multi-threaded programs.
311 Implemented by Ulrich Drepper.
313 * New locales: nan_TW@latin, ks_IN
315 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
316 Implemented by Ulrich Drepper.
318 * Extended printf hook support. It is possible to use user-defined types
319 and extend existing format specifiers.
320 Implemented by Ulrich Drepper.
322 * Handling for group shadow files has been added.
323 Implemented by Ulrich Drepper.
325 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
326 servers (the case, e.g., for some people using the built-in DNS
327 server in ADSL modems/routers). There is a once-per-process timeout
328 in case of a broken server. To avoid it, users can run nscd or put
329 'options single-request' in /etc/resolv.conf.
330 Implemented by Ulrich Drepper.
334 * The following bugs are resolved with this release:
336 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
337 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
338 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
339 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
340 6968, 6974, 6980, 6995, 7008, 7009, 7029
342 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
343 up at the same time. Implemented by Ulrich Drepper.
345 * TLS descriptors for LD and GD on x86 and x86-64.
346 Implemented by Alexandre Oliva.
348 * getaddrinfo now handles DCCP and UDPlite.
349 Implemented by Ulrich Drepper.
351 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
352 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
353 Implemented by Ulrich Drepper.
355 * New implementation of memmem, strstr, and strcasestr which is O(n).
356 Implemented by Eric Blake.
358 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
360 * Implement "e" option for popen to open file descriptor with the
361 close-on-exec flag set. Implemented by Ulrich Drepper.
363 * Implement "b" mode for fmemopen. In this mode writes writes don't
364 implicitly add a NUL byte and seeks from the end of the buffer really
365 use the buffer end, not the string length as the basis.
366 Implemented by Ulrich Drepper.
368 * Many functions, exported and internal, now atomically set the close-on-exec
369 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
371 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
373 Implemented by Pravin Satpute.
375 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
379 * The following bugs are resolved with this release:
381 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
382 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
383 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
384 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
385 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
386 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
387 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
389 * New locales: bo_CN, bo_IN, shs_CA.
391 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
393 * Sorting rules for some Indian languages (Devanagari and Gujarati).
394 Implemented by Pravin Satpute.
396 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
398 * nscd caches now all timeouts for DNS entries
399 Implemented by Ulrich Drepper.
401 * nscd is more efficient and wakes up less often.
402 Implemented by Ulrich Drepper.
404 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
405 vdprintf, and obstack_vprintf.
406 Implemented by Jakub Jelinek.
408 * Faster memset for x86-64.
409 Implemented by Harsha Jagasia and H.J. Lu.
411 * Faster memcpy on x86.
412 Implemented by Ulrich Drepper.
414 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
415 Implemented by Ulrich Drepper.
417 * Faster sqrt and sqrtf implemention for some PPC variants.
418 Implemented by Stephen Munroe.
422 * The following bugs are resolved with this release:
424 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
425 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
426 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
427 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
428 5071, 5103, 5104, 5112, 5113, 5184, 5186
430 * More checking functions: fread, fread_unlocked, open*, mq_open.
431 Implemented by Jakub Jelinek and Ulrich Drepper.
433 * Extend fortification to C++. Implemented by Jakub Jelinek.
435 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
436 by not recognizing 'a' as a modifier when those specs are requested.
437 Implemented by Jakub Jelinek.
439 * PPC optimizations to math and string functions.
440 Implemented by Steven Munroe.
442 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
443 options to be passed. Implemented by Ulrich Drepper.
445 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
447 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
448 Implemented by Ulrich Drepper.
450 * Handle private futexes in the NPTL implementation.
451 Implemented by Jakub Jelinek and Ulrich Drepper.
453 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
454 Implemented by Roland McGrath and Ulrich Drepper.
456 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
458 * SHA-256 and SHA-512 based password encryption.
459 Implemented by Ulrich Drepper.
461 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
462 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
465 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
466 Implemented by Ulrich Drepper.
470 * The following bugs are resolved with this release:
472 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
473 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
474 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
475 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
476 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
477 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
478 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
481 * New Linux interfaces: epoll_pwait, sched_getcpu.
483 * New generic interfaces: strerror_l.
485 * nscd can now cache the services database. Implemented by Ulrich Drepper.
489 * The following bugs are resolved with this release:
491 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
492 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
493 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
494 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
495 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
496 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
497 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
498 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
499 3225, 3251, 3252, 3253, 3273
501 * For Linux, the sorting of addresses returned by getaddrinfo now also
502 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
503 Implemented by Ulrich Drepper.
505 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
506 Implemented by Ulrich Drepper.
508 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
510 * New iconv module for MIK. Contributed by Alexander Shopov.
512 * For sites with broken group and/or passwd database, the auto-propagate
513 option of nscd can prevent creating ID lookup entries from the results
514 of a name lookup and vice versa. This usually is no problem but some
515 site might have problems with the default behavior.
516 Implemented by Ulrich Drepper.
518 * Iterating over entire database in NIS can be slow. With the
519 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
520 to trade time for memory. The entire database will be read at once.
521 Implemented by Ulrich Drepper.
523 * The interfaces introduced in RFC 3542 have been implemented by
526 * Support for the new ELF hash table format was added by Ulrich Drepper.
528 * Support for priority inheritance mutexes added by Jakub Jelinek and
531 * Support for priority protected mutexes added by Jakub Jelinek.
533 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
534 or_IN, csb_PL, fy_NL, sr_ME.
538 * More overflow detection functions.
540 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
541 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
543 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
544 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
545 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
546 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
547 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
548 by Masahide Washizawa.
550 * It is now possible to install audit libraries for the dynamic linker using
551 LD_AUDIT. Implemented by Ulrich Drepper.
553 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
554 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
555 For a libc and libpthread that works well on Linux 2.4 kernels, we
556 recommend using the stable 2.3 branch.
558 * The new function open_wmemstream acts like open_memstream,
559 but uses a wchar_t wide character buffer.
561 * The new function ppoll is an improved version of poll, similar to pselect.
563 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
564 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
565 renameat, unlinkat, linkat, symlinkat, readlinkat.
567 * New Linux kernel system calls: unshare,
568 inotify_init, inotify_add_watch, inotify_rm_watch.
570 * The euidaccess function is now also known by the alias eaccess,
571 for compatibility with some other systems.
573 * Timezone data updated to 2006b version.
577 * The following bugs are resolved with this release:
579 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
580 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
581 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
582 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
583 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
584 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
586 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
588 * As of this release, GCC 4 can be used to compile the C Library.
590 * Timezone data updated to 2005m version.
594 * The following bugs are resolved with this release:
596 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
597 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
598 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
599 777, 787, 821, 822, 823, 825
601 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
605 * Support for RFC 3678. Real implementations exist only for Linux so far.
606 Implemented by Ulrich Drepper.
608 * nscd can now cache entries persistently. Expiring entries are reloaded.
609 For speedups the cache can be shared in memory with client processes.
610 Implemented by Ulrich Drepper.
612 * nscd can now perform SELinux checks.
613 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
615 * getaddrinfo queries are now cached. Canonical name lookup is performed
617 Implemented by Ulrich Drepper.
619 * The nothrow function attribute is used when headers are used by gcc when
620 compiling C code. This can avoid significant amounts of exception
623 * The malloc functions perform more error checking and are stricter when
624 it comes to reacting on errors. The default action is to terminate
625 the process after showing an error message. Implemented by Ulrich Drepper.
627 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
628 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
630 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
631 namespaces using the new function dlmopen(). This feature is of course,
632 like most other dynamic loading functionality, not available in statically
633 linked applications. Implemented by Ulrich Drepper.
635 * Low-overhead boundary checking variants of string and some stdio functions
636 were added. These are to be used in conjunction with a gcc patch by
637 Jakub Jelinek which adds calls to these functions if possible.
638 Implemented by Jakub Jelinek and Ulrich Drepper.
640 * Old code for several operating systems and machine architectures that
641 have not been in working condition in a long time have been removed from
642 the main source tree maintained by the GNU C Library's maintainers.
643 These files are now reside in the separate `ports' source module
644 that is usable as an add-on when building the library.
648 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
649 interrogate the dynamic linker, compatible with the Solaris interface.
651 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
652 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
654 * getifaddrs now uses the netlink interface on Linux to get its information.
655 Implemented by Thorsten Kukuk.
657 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
658 Implemented by Ulrich Drepper.
660 * support for non-executable stacks on x86 has been added. Changes mostly
663 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
666 * getaddrinfo now performs destination address selection according to
671 * Thread-safe interfaces for many functions that access locale data
672 were added in version 2.3, but these features were omitted from NEWS.
673 Many functions have variants with an `_l' suffix that take a `locale_t'
674 object as a parameter rather than consulting the current locale.
675 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
676 create and maintain `locale_t' objects. Additionally, the new function
677 `uselocale' sets "the current locale" (as used by functions not so
678 parameterized) set for an individual thread. These features were added
679 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
681 * The functions getresuid, getresgid, setresuid, and setresgid, which
682 have long been available on Linux, are now declared in <unistd.h>
683 and are now also available on the Hurd.
685 * ELF thread-local storage support (TLS) now works on x86-64.
687 * The new dynamic string token $LIB is expanded in shared library names.
688 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
690 * Aldy Hernandez contributed complete software floating point support for
691 PowerPC machines with no FPU.
693 * fexecve is implemented on Linux.
695 * The `btowc' function should work at least twice as fast due to
696 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
698 * With approriate thread add-ons cancelable functions are now implemented
699 in libc.so as well. No need to call the function in libpthread. This
700 change allowed to finally disable the incorrect and expensive handling
701 of weak definition in ld.so.
703 * Yet more PLT entries in libc.so have been removed. We finally arrived
704 at the bare minimum. Startup times improved appropriately.
706 * Support for the new Linux/x86 system call interface was added. The
707 AT_SYSINFO auxiliary vector entry is recognized and handled.
711 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
714 * iconv (the program and the interface) now accepts empty names (excluding
715 options like //TRANSLIT) to mean "use charset of current locale".
717 * localedef can now transliterate characters in strings which are not in
718 the provided charmap. The information from the input locale is used.
720 * Prelinking support was added for ELF targets. This requires additional
721 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
723 * Read-only stdio streams now use mmap to speed up operation by eliminating
724 copying and buffer underflows. To use add 'm' to the mode string of
725 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
727 * The malloc functions were completely rewritten by Wolfram Gloger based
728 on Doug Lea's malloc-2.7.0.c.
730 * Isamu Hasegawa contributed a completely new and POSIX-conformant
731 implementation of regex.
733 * Bruno Haible upgraded the iconv and locale implementation to support
736 * Contents of the LC_* and LANG environment variables in the CEN style are
737 not recognized anymore. It never was used. Change by Ulrich Drepper.
739 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
740 thread-local storage (TLS) ABI on some platforms.
741 Changes by Ulrich Drepper. SH support by Kaz Kojima.
743 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
744 EUC-JISX0213, and TSCII.
746 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
747 BSD-compatible interface for getting all network interface addresses.
748 Implementation for IPv4 by Roland McGrath.
750 * Loading of locale data is faster due to the introduction of a locale
751 archive. Implemented by Roland McGrath and Ulrich Drepper.
753 * Startup times are significantly reduced by not using exported functions
754 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
757 * Steven Munroe contributed a port to PowerPC64/Linux.
761 * The Hurd now uses the GNU libio implementation of stdio rather than the
762 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
764 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
765 with the same behavior as the Linux system call of the same name.
769 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
770 128-bit long double format.
772 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
773 IBM1161, and IBM1162 charsets.
775 * Andreas Jaeger contributed a port to x86-64/Linux.
777 * Peter Bruin contributed a port to PowerPC/Hurd.
779 * libc functions using I/O streams now can handle wide-oriented streams
782 * optimizations in the dynamic linker. Binaries created by recent binutils
783 versions start up quicker due to reduced time spent on relocations.
785 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
789 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
790 asinh, atanh, j0 for the 128-bit long double format.
792 * Bruno Haible updated all the code handling Unicode in some form to
795 * Speed of regex for single-byte locales is back to previous levels.
796 Patch by Isamu Hasegawa.
798 * Alpha, SPARC, and IA-64 now also using floating stacks.
800 * Startup time of internationalized applications greatly improved through
801 iconv cache. Use iconvconfig to generate the cache file.
802 Contributed by Ulrich Drepper.
804 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
805 severe performance problems. Patch by David Mosberger.
807 * The Hurd port got a lot more functionality like AIO, various stdio
808 extensions, etc. Mainly done by Roland McGrath.
810 * mtrace can now lookup symbols in shared libraries.
814 * Intel's IA-64 math library is largely integrated. It provides fast and
815 accurate implementatations for most basic and standard math functions
816 in float, double, and long double format.
818 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
819 and asin for the 96-bit long double format and asin, log, tan for the
820 128-bit long double format.
822 * The beginning of a last-bit accurate math library by IBM Haifa were added.
823 The basic double functions exist today. Contributed by Abraham Ziv
824 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
825 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
827 * An asynchronous name lookup library was added. The interface is designed
828 after POSIX AIO. The proposal was circulated beforehand to get comments.
829 No negative ones came in. Implemented by Ulrich Drepper.
831 * Port to S390/64bit contributed by Martin Schwidefsky
832 <schwidefsky@de.ibm.com>.
834 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
835 of functions for Linux/IA-64.
837 * The RPC code is now thread safe. Threads can now use the same service
838 of different services at the same time. Patch by Eric Norum
839 <eric.norum@usask.ca> with some help by Ulrich Drepper.
841 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
842 family of functions for Linux/S390.
844 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
845 of functions for Linux/x86.
847 * Port to Linux/CRIS contributed by Axis Communications.
851 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
852 we can now check for namespace violations and missing declarations. The
853 result is that almost all headers are now Unix-compliant (as defined in
854 the upcoming XPG6). The negative side is that some programs might need
855 corrections, too, if they depend on the incorrect form of the headers in
856 previous versions which defined too many symbols and included too many
859 * regex now handles multibyte character sets correctly.
860 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
862 * iconv (the program) does now conform to the upcoming XPG6 and handles
863 charmaps. Instead of the charset names the path of charmaps can be
864 provided and the conversion happens based on this data.
865 Contributed by Ulrich Drepper.
867 * The locale program now provides detailed information about the installed
872 only lists the names of the supported locales
876 provides details such as country, language, and codeset name.
877 Contributed by Ulrich Drepper.
881 * The gencat program now parses the input file according to the charset
882 selected by the LC_CTYPE category. This is important for stateful
883 character sets. To make generating catalogs easier there is a way
884 to overwrite the charset selected by the locale: before the first
885 message or $ quote line the catalog can contain a line like
889 to select the charset (ISO-8859-2 in this case).
891 Implemented by Shinya Hanataka and Ulrich Drepper.
893 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
894 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
895 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
897 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
898 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
900 * The LANGUAGE environment variable is now ignored unless the locale is
901 changed from the default "C" locale.
903 * The usual bug fixes.
907 * Greg McGary added runtime support for bounds checking using gcc's
908 new -fbounded-pointers option. ix86 target is complete. PowerPC
911 * Thorsten Kukuk added secure mode support to nscd.
913 * The Berkeley db libraries have been removed.
915 Related, the nss_db module is now in a separate package since it
916 obviously requires a database library being available.
918 * Wide character I/O streams implemented by Ulrich Drepper.
920 * Functions from the extended socket API added by Ulrich Drepper.
922 * Functions feenableexcept and fedisableexcept to control the
923 behaviour of individual exceptions have been added by Andreas Jaeger.
925 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
927 * The resolver code has been updated from bind 8.2.3-T5B which supports
928 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
931 This change could in some situations effect backward compatibility. Since
932 now `_res' is a thread-local instead of a global variable, modifying it
933 in one thread does not have any effect in other threads.
935 The resolver library was also extended to allow IPv6 as the transport
936 protocol for the requests. This work was done by Stig Venaas.
938 * Compatibility code for K&R C compilers has been removed from the
939 header files. A ISO C compiler is needed to use the library
940 (conforming to either C89 or C99 standard).
942 * Complete rewrite of the localedef program to support multibyte character
943 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
944 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
945 Implemented by Ulrich Drepper.
947 Bruno Haible significantly improved the generation and use of the data
948 structures for the wide character tables.
950 * Plural handling in gettext implemented by Ulrich Drepper.
952 * The utmp daemon has been removed.
954 * The port to MIPS-Linux has been finished by Andreas Jaeger.
956 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
959 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
961 * POSIX barriers implemented by Kaz Kylheku.
963 * POSIX spawn function family implemented by Ulrich Drepper.
965 * POSIX spinlocks are now available.
967 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
969 * the configure option --enable-kernel=X.Y.Z allows to strip out
970 compatibility for kernel versions before X.Y.Z. This is currently only
971 implemented for Linux.
973 * the sockaddr_in6 structure changed. The IPv6 working group added a new
974 field sin6_scope_id. This means that all programs using IPv6 should be
975 recompiled. Don't expect binary compatibility with previous glibc
978 * various conversion modules for IBM character sets contributed by
981 * IA-64 port by Jes Sorensen and HJ Lu.
983 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
984 Compiling the GNU C Library for Linux/ia64
985 ******************************************
987 Please refer to the file INSTALL in the same directory as you found
988 this file for general information about configuring and compiling
991 For general inquiries about glibc under Linux/ia64 please use the
992 following mailing list linux-ia64@linuxia64.org or one of the relevant
995 Recommended Tools for Compilation
996 =================================
998 In order for glibc-2.2 to build correctly on the ia64 you need at
999 least the following versions of the GNU tools (the :
1001 * The Cygnus toolchain snapshot for the ia64 as of August 4
1002 including the provided set of patches. It is however recommend
1003 you use the October 24 toolchain snapshot or a more recent version.
1005 OR alternatively you can try the following (the Cygnus toolchain is
1006 the recommended solution):
1008 * GCC and binutils, GAS and GNU LD out of CVS from
1009 sources.redhat.com as of August 28, 2000 or later. The CVS tree
1010 may require special patches to work properly on the ia64.
1012 Configuring and compiling GNU Libc for Linux/ia64
1013 =================================================
1015 The library requires Linux kernel version 2.4.0-test4-000728 or
1016 later to funtion properly. Besides that it support for debug libraries
1017 is currently untested. Hence the following options
1018 are required for configuring the library:
1020 --disable-debug --enable-kernel=2.4.0
1022 It is also important that you make sure the library picks up the
1023 appropriate kernel header files, if you do not have recent enough
1024 kernel headers in /usr/src/linux/include, you should use the
1025 --with-headers=<path> option to specify the location.
1027 As an example I personally use the following options to configure
1032 --enable-kernel=2.4.0
1034 --enable-add-ons=yes
1036 --with-headers=/home/jes/linux/include
1041 Jes Sorensen <jes@linuxcare.com>,
1043 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1057 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1059 * New xdr functions are added; some rpc functions are now 64bit clean.
1061 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1063 * Fixed known incompatibilities with glibc 2.0.
1065 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1067 * Optimized a number of functions (especially the ELF dynamic loader).
1069 * Update timezone data files.
1071 * lots of charmaps corrections
1073 * some new locale definitions and charmaps
1078 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1079 conform to POSIX member type requirements. Symbol versions have been
1080 adjusted as needed within the library, and for direct use by applications,
1081 but there is potential for problems if third-party libraries use
1082 struct timeval as part of their interface. This does not present
1083 a problem for X and other "essential" system libraries.
1085 * An additional locale model to support C++ Standard Library locale
1086 model and probably more was implemented by Ulrich Drepper.
1088 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1091 * Miles Bader provided the `argp' function family to support hierachical
1092 command line argument parsing, layered on top of getopt.
1094 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1096 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1099 * scanf recognizes the %a and %A format for scanning floating point numbers.
1101 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1102 information and interfaces for the available integer types.
1104 * about 130 new math functions were added to implement the ISO C9x math
1107 * the new header <complex.h> contains definitions of the complex math
1108 functions from ISO C 9X.
1110 * the new header <tgmath.h> defines generic macros to use complex or
1111 real valued functions.
1113 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1115 * Andreas Jaeger provided a test suite for the math library.
1117 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1119 * Ulrich Drepper added character set conversion functions (iconv).
1121 * Optimized string functions have been added.
1123 * The localedata addon is now part of glibc.
1125 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1127 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1128 daemon for NSS (nscd).
1130 Missing a better place here are some numbers on improvements. Under
1131 Linux 2.1.125 un-tar-ing the kernel sources takes
1135 using local files 12.19s 6.88s 22.91s
1137 using NIS 13.92s 8.91s 26.34s
1139 using NIS & nscd 10.37s 7.34s 25.30s
1141 using NIS+ 27.57s 30.37s 640.46s
1143 using NIS+ & nscd 10.25s 7.83s 26.51s
1145 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1147 Keep in mind that non-namelookup related operations dominate above times.
1148 It was just a common complain that using NIS+ unpacking the kernel is
1151 [1] The old nscd implementation is not available anymore since it was
1152 distributed with glibc up to version 2.0.98 and thus is now replaced.
1154 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1156 * Mark Kettenis provided a Hesiod NSS module.
1158 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1159 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1161 * rcmd can now handle netgroups (Dick Streefland).
1163 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1166 * Support for the IPv6 protocol has been added to the socket API, as per the
1167 latest draft standards.
1169 * Support for Linux 2.2 has been added.
1171 * Interface changes relative to the latest 2.0.x release:
1172 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1173 addseverity NEW: Unix98
1174 alphasort64 NEW: LFS
1175 argp_err_exit_status NEW: argp, GNU ext
1176 argp_error NEW: argp, GNU ext
1177 argp_failure NEW: argp, GNU ext
1178 argp_help NEW: argp, GNU ext
1179 argp_parse NEW: argp, GNU ext
1180 argp_program_bug_address NEW: argp, GNU ext
1181 argp_program_version NEW: argp, GNU ext
1182 argp_program_version_hook NEW: argp, GNU ext
1183 argp_state_help NEW: argp, GNU ext
1184 argp_usage NEW: argp, GNU ext
1185 authdes_create NEW: Secure RPC
1186 authdes_getucred NEW: Secure RPC
1187 authdes_pk_create NEW: Secure RPC
1188 backtrace NEW: GNU ext.
1189 backtrace_symbols NEW: GNU ext.
1190 backtrace_symbols_fd NEW: GNU ext.
1192 cacosf NEW: ISO C 9x
1193 cacosh NEW: ISO C 9x
1194 cacoshf NEW: ISO C 9x
1195 cacoshl NEW: ISO C 9x
1196 cacosl NEW: ISO C 9x
1203 casinf NEW: ISO C 9x
1204 casinh NEW: ISO C 9x
1205 casinhf NEW: ISO C 9x
1206 casinhl NEW: ISO C 9x
1207 casinl NEW: ISO C 9x
1209 catanf NEW: ISO C 9x
1210 catanh NEW: ISO C 9x
1211 catanhf NEW: ISO C 9x
1212 catanhl NEW: ISO C 9x
1213 catanl NEW: ISO C 9x
1214 cbc_crypt NEW: Secure RPC
1218 ccoshf NEW: ISO C 9x
1219 ccoshl NEW: ISO C 9x
1225 cimagf NEW: ISO C 9x
1226 cimagl NEW: ISO C 9x
1227 clearerr_locked REMOVED
1228 clntunix_create NEW: sunrpc ext
1230 clog10 NEW: ISO C 9x
1231 clog10f NEW: ISO C 9x
1232 clog10l NEW: ISO C 9x
1242 cprojf NEW: ISO C 9x
1243 cprojl NEW: ISO C 9x
1245 crealf NEW: ISO C 9x
1246 creall NEW: ISO C 9x
1251 csinhf NEW: ISO C 9x
1252 csinhl NEW: ISO C 9x
1255 csqrtf NEW: ISO C 9x
1256 csqrtl NEW: ISO C 9x
1260 ctanhf NEW: ISO C 9x
1261 ctanhl NEW: ISO C 9x
1263 des_setparity NEW: Secure RPC
1264 ecb_crypt NEW: Secure RPC
1265 endutxent NEW: Unix98
1267 exp10f NEW: ISO C 9x
1268 exp10l NEW: ISO C 9x
1272 fattach NEW: STREAMS
1273 fdetach NEW: STREAMS
1277 feclearexcept NEW: ISO C 9x
1278 fegetenv NEW: ISO C 9x
1279 fegetexceptflag NEW: ISO C 9x
1280 fegetround NEW: ISO C 9x
1281 feholdexcept NEW: ISO C 9x
1283 feraiseexcept NEW: ISO C 9x
1284 ferror_locked REMOVED
1285 fesetenv NEW: ISO C 9x
1286 fesetexceptflag NEW: ISO C 9x
1287 fesetround NEW: ISO C 9x
1288 fetestexcept NEW: ISO C 9x
1289 feupdateenv NEW: ISO C 9x
1290 fflush_locked REMOVED
1294 fgets_unlocked NEW: GNU ext.
1295 fileno_locked REMOVED
1307 fputc_locked REMOVED
1308 fputs_unlocked NEW: GNU ext.
1309 fread_unlocked NEW: GNU ext.
1314 fstatvfs NEW: Unix98
1318 ftruncate64 NEW: LFS
1320 fwrite_unlocked NEW: GNU ext.
1321 gai_strerror NEW: IPv6
1325 getchar_locked REMOVED
1327 getdate_err NEW: Unix98
1328 getdate_r NEW: GNU ext.
1330 getnameinfo NEW: IPv6
1331 getnetname NEW: Secure RPC
1332 getpmsg NEW: STREAMS
1333 getpt NEW: Unix98 PTY
1334 getrlimit64 NEW: LFS
1335 getutxent NEW: Unix98
1336 getutxid NEW: Unix98
1337 getutxline NEW: Unix98
1338 glob64 NEW: GNU ext.
1339 globfree64 NEW: GNU ext.
1340 gnu_get_libc_release NEW: GNU ext.
1341 gnu_get_libc_version NEW: GNU ext.
1342 grantpt NEW: Unix98 PTY
1343 host2netname NEW: Secure RPC
1345 iconv_close NEW: iconv
1346 iconv_open NEW: iconv
1347 if_freenameindex NEW: IPv6
1348 if_indextoname NEW: IPv6
1349 if_nameindex NEW: IPv6
1350 if_nametoindex NEW: IPv6
1351 in6addr_any NEW: IPv6
1352 in6addr_loopback NEW: IPv6
1353 inet6_isipv4mapped NEW: IPv6
1354 isastream NEW: STREAMS
1355 iswblank NEW: GNU ext.
1356 key_decryptsession NEW: Secure RPC
1357 key_decryptsession_pk NEW: Secure RPC
1358 key_encryptsession NEW: Secure RPC
1359 key_encryptsession_pk NEW: Secure RPC
1360 key_gendes NEW: Secure RPC
1361 key_get_conv NEW: Secure RPC
1362 key_secretkey_is_set NEW: Secure RPC
1363 key_setnet NEW: Secure RPC
1364 key_setsecret NEW: Secure RPC
1365 llrint NEW: ISO C 9x
1366 llrintf NEW: ISO C 9x
1367 llrintl NEW: ISO C 9x
1368 llround NEW: ISO C 9x
1369 llroundf NEW: ISO C 9x
1370 llroundl NEW: ISO C 9x
1375 lrintf NEW: ISO C 9x
1376 lrintl NEW: ISO C 9x
1377 lround NEW: ISO C 9x
1378 lroundf NEW: ISO C 9x
1379 lroundl NEW: ISO C 9x
1381 makecontext NEW: Unix98
1382 mempcpy NEW: GNU ext.
1385 modify_ldt NEW: kernel
1389 nearbyint NEW: ISO C 9x
1390 nearbyintf NEW: ISO C 9x
1391 nearbyintl NEW: ISO C 9x
1392 netname2host NEW: Secure RPC
1393 netname2user NEW: Secure RPC
1394 nexttoward NEW: ISO C 9x
1395 nexttowardf NEW: ISO C 9x
1396 nexttowardl NEW: ISO C 9x
1400 passwd2des NEW: Secure RPC
1402 pow10f NEW: GNU ext.
1403 pow10l NEW: GNU ext.
1406 printf_size NEW: GNU ext.
1407 printf_size_info NEW: GNU ext.
1408 profil_counter REMOVED
1409 pthread_mutexattr_getkind_np REPLACED
1410 pthread_mutexattr_setkind_np REPLACED
1411 ptsname NEW: Unix98 PTY
1412 ptsname_r NEW: Unix98 PTY
1414 putchar_locked REMOVED
1415 putgrent NEW: GNU ext.
1417 putpmsg NEW: STREAMS
1418 pututxline NEW: Unix98
1422 readdir64_r NEW: LFS
1423 remquo NEW: ISO C 9x
1424 remquof NEW: ISO C 9x
1425 remquol NEW: ISO C 9x
1427 roundf NEW: ISO C 9x
1428 roundl NEW: ISO C 9x
1430 scalbln NEW: ISO C 9x
1431 scalblnf NEW: ISO C 9x
1432 scalblnl NEW: ISO C 9x
1434 sendfile NEW: kernel
1435 setcontext NEW: Unix98
1436 setrlimit64 NEW: LFS
1437 setutxent NEW: Unix98
1439 sigignore NEW: Unix98
1440 sigqueue NEW: POSIX.1b
1441 sigrelse NEW: Unix98
1442 sigset NEW: POSIX.1b
1443 sigtimedwait NEW: POSIX.1b
1444 sigwaitinfo NEW: POSIX.1b
1445 sincos NEW: GNU ext.
1446 sincosf NEW: GNU ext.
1447 sincosl NEW: GNU ext.
1451 strcasestr NEW: GNU ext.
1452 strtoimax NEW: ISO C 9x
1453 strtoumax NEW: ISO C 9x
1454 strverscmp NEW: GNU ext.
1455 svcauthdes_stats NEW: Secure RPC
1456 svcunix_create NEW: sunrpc etx
1457 svcunixfd_create NEW: sunrpc ext
1458 swapcontext NEW: Unix98
1459 tcgetsid NEW: Unix98 PTY
1460 tdestroy NEW: GNU ext.
1461 tgamma NEW: ISO C 9x
1462 tgammaf NEW: ISO C 9x
1463 tgammal NEW: ISO C 9x
1467 truncf NEW: ISO C 9x
1468 truncl NEW: ISO C 9x
1470 unlockpt NEW: Unix98 PTY
1471 updwtmpx NEW: Unix98
1472 user2netname NEW: Secure RPC
1473 utmpxname NEW: Unix98
1474 versionsort NEW: GNU ext.
1475 versionsort64 NEW: GNU ext.
1477 wcscasecmp NEW: GNU ext.
1478 wcsncasecmp NEW: GNU ext.
1479 wcsnlen NEW: GNU ext.
1480 wcstoimax NEW: ISO C 9x
1481 wcstoll NEW: ISO C 9x
1482 wcstoull NEW: ISO C 9x
1483 wcstoumax NEW: ISO C 9x
1485 wordexp NEW: POSIX.2
1486 wordfree NEW: POSIX.2
1487 write_profiling REMOVED
1488 xdecrypt NEW: Secure RPC
1489 xdr_authdes_cred NEW: Secure RPC
1490 xdr_authdes_verf NEW: Secure RPC
1491 xdr_cryptkeyarg NEW: Secure RPC
1492 xdr_cryptkeyarg2 NEW: Secure RPC
1493 xdr_cryptkeyres NEW: Secure RPC
1494 xdr_getcredres NEW: Secure RPC
1495 xdr_key_netstarg NEW: Secure RPC
1496 xdr_key_netstres NEW: Secure RPC
1497 xdr_keybuf NEW: Secure RPC
1498 xdr_keystatus NEW: Secure RPC
1499 xdr_netnamestr NEW: Secure RPC
1500 xdr_sizeof NEW: Secure RPC
1501 xdr_unixcred NEW: sunrpc ext
1502 xencrypt NEW: Secure RPC
1503 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1514 * inet_ntoa is thread-safe
1516 * updwtmp is moved from libutil to libc
1518 * rewrite of cbrt function
1520 * update of timezone data
1534 * add atoll function
1536 * fix complex problems in Berkeley DB code
1538 * fix math functions
1542 * fixed lots of header problems (especially Linux/GNU specific)
1544 * dynamic loader preserves all registers
1546 * Roland McGrath provided support for handling of auxiliary objects in
1547 the ELF dynamic loader.
1549 * support for parallel builds is improved
1553 * GNU extensions are no longer declared by default. To enable them you
1554 must define the macro `_GNU_SOURCE' in your program or compile with
1557 * The library has changed from using GNU ld symbol aliases to using weak
1558 symbols where available. The ELF object file format supports weak
1559 symbols; GNU ld also supports weak symbols in the a.out format. (There
1560 is also now support for other GNU ld extensions in ELF. Use the
1561 `--with-elf' option to configure to indicate you have ELF, and
1562 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1563 of many files which contained only symbol aliases, reducing the size of
1564 the source and the compiled library; many other files were renamed to
1565 less cryptic names previously occupied by the symbol alias files.
1566 There is a new header file <elf.h> for programs which operate on
1567 files in the ELF format.
1569 * Converted to Autoconf version 2, so `configure' has more options.
1570 Run `configure --help' to see the details.
1572 * The library can now be configured to build profiling, highly-optimized
1573 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1574 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1575 `configure' enable building these extra libraries. The shared library is
1576 built by default when using both ELF and GNU ld. When shared libraries
1577 are enabled, the new library `-ldl' is available for arbitrary run-time
1578 loading of shared objects; its interface is defined in <dlfcn.h>. The
1579 new header file <link.h> gives access to the internals of the run-time
1580 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1581 application of same name on other systems and it provides information
1582 about dynamically linked binaries.
1584 * The C library now provides the run-time support code for profiling
1585 executables compiled with `-pg'. Programs can control the profiling code
1586 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1587 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1588 the support for this file format was contributed by David Mosberger-Tang.
1590 * The math code has been replaced with a math library based on fdlibm from
1591 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1592 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1593 functions. The math functions now reside in a separate library, so
1594 programs using them will need to use `-lm' their linking commands.
1596 * John C. Bowman contributed optimized ix87 assembler inline functions.
1598 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1599 mechanism similar to that found in Solaris 2. This is now used for the
1600 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1601 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1602 file controls what services are used for each individual database. This
1603 works by loading shared libraries with names specified in `nsswitch.conf',
1604 so service modules can be changed or added at any time without even
1605 relinking any program. Currently there are the file, db, and NIS based
1606 NSS services available.
1608 * The new functions `strtoq' and `strtouq' parse integer values from
1609 strings, like `strtol' and `strtoul', but they return `long long int' and
1610 `unsigned long long int' values, respectively (64-bit quantities).
1612 * The new functions `strtof' and `strtold' parse floating-point values from
1613 strings, like `strtod', but they return `float' and `long double' values,
1614 respectively (on some machines `double' and `long double' are the same).
1616 * Ulrich Drepper has contributed new implementations of the floating-point
1617 printing and reading code used in the `printf' family of functions and
1618 `strtod', `strtof', and `strtold'. These new functions are perfectly
1619 accurate, and much faster than the old ones.
1621 * The implementation of the POSIX locale model was completely rewritten by
1622 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1623 to compile the POSIX locale definition.
1625 * The former dummy implementations of the strcoll and strxfrm function are
1626 now replaced by fully functional code contributed by Ulrich Drepper. The
1627 collation information comes from the POSIX locale definitions.
1629 * The new header <langinfo.h> defines an interface for accessing
1630 various locale-dependent data (using the locale chosen with `setlocale').
1632 * Ulrich Drepper has contributed a new suite of functions for operation on
1633 wide-character and multibyte-character strings, in <wchar.h>;
1634 and classification and case conversion of wide characters, in <wctype.h>.
1635 These new functions are conforming to the ISO C, Amendement 1 specification.
1637 * There is now a second implementation of the standard I/O library available.
1638 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1639 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1641 * You can now use positional parameter specifications in format strings
1642 for the `printf' and `scanf' families of functions. For example,
1643 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1644 ``Number 6, Mr Jones''. This is mainly useful when providing different
1645 format strings for different languages, whose grammars may dictate
1646 different orderings of the values being printed. To support this
1647 feature, the interface for `register_printf_handler' has changed; see
1648 the header file <printf.h> for details.
1650 * The `printf' and `scanf' families of functions now understand a new
1651 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1652 to group numbers as indicated by the locale; for `scanf' and friends, this
1653 says to accept as valid only a number with all the proper grouping
1654 separators in the right places. In the default "C" locale, numbers are
1655 not grouped; but locales for specific countries will define the usual
1656 conventions (i.e. separate thousands with `,' in the US locale).
1658 * The pgrp functions have been regularized, slightly incompatibly but much
1659 less confusingly. The core functions are now `getpgid' and `setpgid',
1660 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1661 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1662 provided for compatibility. There is no longer an incompatible `getpgrp'
1663 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1665 * The new header file <fts.h> and suite of functions simplify programs that
1666 operate on directory trees. This code comes from 4.4 BSD.
1668 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1669 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1670 NSS scheme used in glibc.
1672 * There is a new malloc debugging hook `__memalign_hook'.
1674 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1675 `unsigned int' in <sys/types.h>. These are for compatibility only and
1676 their use is discouraged.
1678 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1679 done differently, so that it works even without GNU ld.
1681 * New function `euidaccess' checks allowed access to a file like `access',
1682 but using the effective IDs instead of the real IDs.
1684 * The time zone data files have been updated for the latest and greatest
1685 local time conventions of the countries of the world.
1687 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1690 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1691 for formatting floating-point numbers. They are provided only for
1692 compatibility; new programs should use `sprintf' instead. There are
1693 also equivalent function for the `long double' floating-point type and
1694 all functions also exist in a reentrant form.
1696 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1697 functions for maintaining the login-record files (primarily of use to
1698 system programs such as `login'), and convenient functions for
1699 allocating and initializing a pseudo-terminal (pty) device.
1701 * Ulrich Drepper has contributed new support for System V style
1702 shared memory and IPC on systems that support it.
1704 * Ulrich Drepper has contributed several miscellaneous new functions found
1705 in System V: The `hsearch' family of functions provide an effective
1706 implementation of hash tables; `a64l' and `l64a' provide a very simple
1707 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1710 * Ulrich Drepper has contributed new reentrant counterparts for the
1711 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1713 * Ulrich Drepper has contributed new, highly-optimized versions of several
1714 string functions for the i486/Pentium family of processors.
1716 * Ulrich Drepper has updated the Linux-specific code, based largely
1717 on work done in Hongjiu Lu's version of GNU libc for Linux.
1718 The GNU library now supports Linux versions 2.0.10 and later,
1719 using the ELF object file format (i[3456]86-*-linux).
1721 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1723 * David Mosberger-Tang and Richard Henderson have ported the C library
1724 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1725 dynamic linking support for ELF/Alpha.
1727 * Richard Henderson contributed several Alpha optimized assembler function
1728 for arithmetic and string handling.
1730 * Ulrich Drepper has contributed a new set of message catalog functions to
1731 support multiple languages using the <libintl.h> interface, for use with
1732 his new package GNU gettext. Translation volunteers have contributed
1733 catalogs of the library's messages in Spanish, German, and Korean.
1735 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1736 program and the `catgets' function for reading the catalog files it
1737 creates. (The <libintl.h> interface is preferred; we include the
1738 <nl_types.h> interface using `catgets' only for source compatibility with
1739 programs already written to use it.)
1741 * New header file <values.h> gives SVID-compatible names for <limits.h>
1744 * Various new macros, declarations, and small header files for compatibility
1747 * New function `group_member' is a convenient way to check if a process has
1748 a given effective group ID.
1750 * When using GCC 2.7 and later, the socket functions are now declared in a
1751 special way so that passing an argument of type `struct sockaddr_in *',
1752 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1753 `struct sockaddr *' type, does not generate a type-clash warning.
1755 * New function `error' declared in header file <error.h> is a convenient
1756 function for printing error messages and optionally exiting; this is the
1757 canonical function used in GNU programs. The new functions `err', `warn',
1758 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1759 doing the same thing.
1761 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1762 POSIX.2 `glob' function to do ~ and {...} expansion.
1764 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1765 `clearenv' which is used in POSIX.9 is also available.
1767 * New function `getsid' returns session ID number on systems that support it.
1769 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1770 files <db.h> and <mpool.h> provide a rich set of functions for several
1771 types of simple databases stored in memory and in files, and <ndbm.h> is
1772 an old `ndbm'-compatible interface using the `db' functions. Link with
1773 `-ldb' to get these functions.
1775 * New macro `strdupa' copies a string like `strdup', but uses local stack
1776 space from `alloca' instead of dynamic heap space from `malloc'.
1778 * New function `strnlen' is like `strlen' but searches only a given maximum
1779 number of characters for the null terminator. `stpncpy', `strndup' and
1780 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1783 * New function `statfs' in header <sys/statfs.h>.
1785 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1786 provide convenient functions for operating on blocks of null-terminated
1789 * A new suite of functions in <utmp.h> handle all the details of reading
1790 and writing the utmp file.
1792 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1795 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1796 completely POSIX compliant and also implemented the extended functionality
1797 to handle alternate digit representation and alternate era date formats.
1799 * Ulrich Drepper provided an implementation of the `strptime' function
1800 defined in XPG4.2 which transforms a string into a `struct tm' value.
1802 * Paul Eggert provided the tzselect shell script as part of the timezone
1803 code. The shell script makes it easy to select the correct timezone
1806 * The implementation of the malloc family of functions is completely replaced
1807 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1808 The implementation uses the mmap function (if available) and it is
1809 optimized for the use in multi threaded programs.
1811 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1812 functions. This new functionality is usable by specifying a special
1813 salt string and it is compatible with implementation on *BSD systems.
1815 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1816 `getsubopt' to handle second level command line options, `bsd_signal'
1817 to access BSD style `signal' functionality, the obsolete `regexp' style
1820 * the `lchown' function is available on system which support this
1823 * The implementation of the shadow password handling function was contributed
1826 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1828 * POSIX.1g support was added. The <sys/select.h> header is available,
1829 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1830 implementation of `getaddrinfo'.
1834 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1836 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1837 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1839 * The new function `daemon' from 4.4 BSD is useful for server programs that
1840 want to put themselves in the background.
1842 * Joel Sherrill has contributed support for several standalone boards that
1843 run without an operating system.
1845 * `printf', `scanf' and friends now accept a `q' type modifier for long
1846 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1848 * All of the code taken from BSD (notably most of the math and networking
1849 routines) has been updated from the BSD 4.4-Lite release.
1851 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1853 * The new functions `getdomainname' and `setdomainname' fetch or change the
1854 YP/NIS domain name. These are system calls which exist on systems which
1857 * The time zone data files have been updated for the latest international
1860 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1861 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1865 * The C library now includes support for Sun RPC, from Sun's free
1866 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1867 are included. (There is still no support for YP.)
1869 * Tom Quinn has contributed a port of the C library to SGI machines running
1870 Irix 4 (mips-sgi-irix4).
1872 * The new `lockf' function is a simplified interface to the locking
1873 facilities of `fcntl', included for compatibility.
1875 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1877 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1879 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1882 * The error message printed by `assert' for a failed assertion now includes
1883 the name of the program (if using GNU ld) and the name of the calling
1884 function (with versions of GCC that support this).
1886 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1888 * The library now includes the <sys/mman.h> header file and memory
1889 management functions `mmap', `munmap', `mprotect', `msync', and
1890 `madvise', on systems that support those facilities.
1892 * The interface for `mcheck' has changed slightly: the function called to
1893 abort the program when an allocation inconsistency is detected now takes
1894 an argument that indicates the type of failure. The new function
1895 `mprobe' lets you request a consistency check for a particular block at
1896 any time (checks are normally done only when you call `free' or `realloc'
1899 * It is now possible to easily cross-compile the C library, building on one
1900 system a library to run on another machine and/or operating system. All
1901 you need to do is set the variable `HOST_CC' in `configparms' to the
1902 native compiler for programs to run on the machine you are building on (a
1903 few generator programs are used on Unix systems); set `CC' to the
1906 * The new function `fexecve' (only implemented on the GNU system) executes
1907 a program file given a file descriptor already open on the file.
1911 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1912 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1914 * You can set the variable `libprefix' in `configparms' to specify a prefix
1915 to be prepended to installed library files; this makes it easy to install
1916 the GNU C library to be linked as `-lgnuc' or whatever.
1918 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1919 copies a limited number of characters from a string, and returns the
1920 address of the last character written.
1922 * You no longer need to check for whether the installed `stddef.h' is
1923 compatible with the GNU C library. configure now checks for you.
1925 * You can now define a per-stream `fileno' function to convert the
1926 stream's cookie into an integral file descriptor.
1928 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1929 allocates zero bytes of storage, and returns a unique pointer which
1930 you can pass to `realloc' or `free'. The behavior is undefined if
1931 you dereference this pointer.
1933 * The C library now runs on Sony NEWS m68k machines running either
1934 NewsOS 3 or NewsOS 4.
1936 * The new `syscall' function is a system-dependent primitive function
1937 for invoking system calls. It has the canonical behavior on Unix
1938 systems, including unreliable return values for some calls (such as
1939 `pipe', `fork' and `getppid').
1941 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1942 to `EAGAIN', which is the preferred name. On systems whose kernels
1943 use two distinct codes, the C library now translates EWOULDBLOCK to
1944 EAGAIN in every system call function.
1948 * The GNU C Library Reference Manual is now distributed with the library.
1949 `make dvi' will produce a DVI file of the printed manual.
1950 `make info' will produce Info files that you can read on line using C-h i
1951 in Emacs or the `info' program.
1952 Please send comments on the manual to bug-glibc-manual@gnu.org.
1954 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1956 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1958 * Jason Merrill has contributed a port to the Sequent Symmetry running
1959 Dynix version 3 (i386-sequent-dynix).
1961 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1962 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1964 * New function `memory_warnings' lets you arrange to get warnings when
1965 malloc is running out of memory to allocate, like Emacs gives you.
1967 * The C library now contains the relocating allocator used in Emacs 19 for
1968 its editing buffers. This allocator (ralloc) minimizes allocation
1969 overhead and fragmentation by moving allocated regions around whenever it
1970 needs to. You always refer to a ralloc'd region with a "handle" (a
1971 pointer to a pointer--an object of type `void **').
1973 * There is a new `printf' format: `%m' gives you the string corresponding
1974 to the error code in `errno'.
1976 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1977 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1978 pass, the `a' modifier says to fill in a `char **' you pass with a
1981 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1982 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1983 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1985 * `mkstemp' is a traditional Unix function to atomically create and open a
1986 uniquely-named temporary file.
1990 * The standard location for the file that says what the local timezone is
1991 has changed again. It is now `/usr/local/etc/localtime' (or more
1992 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1994 * The distribution no longer contains any files with names longer than 14
1997 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1998 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2000 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2004 * The configuration process has changed quite a bit. The `configure'
2005 script is now used just like the configuration scripts for other GNU
2006 packages. The `sysdeps' directory hierarchy is much rearranged.
2007 The file `INSTALL' explains the new scheme in detail.
2009 * The header files no longer need to be processed into ANSI C and
2010 traditional C versions. There is just one set of files to install, and
2011 it will work with ANSI or old C compilers (including `gcc -traditional').
2013 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2014 MIPS DECStation running Ultrix 4.
2016 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2017 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2018 made itself into a shared library.
2020 * Yet further improved support for the i386, running 4.3 BSD-like systems
2021 (such as Mach 3 with the Unix single-server), or System V.
2023 * New function `strncasecmp' to do case-insensitive string comparison
2024 with limited length.
2026 * New function `strsep' is a reentrant alternative to `strtok'.
2028 * New functions `scandir' and `alphasort' for searching directories.
2030 * New function `setenv' is a better interface to `putenv'.
2032 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2033 function for traversing a directory tree.
2035 * The GNU obstack package is now also part of the C library.
2036 The new function `open_obstack_stream' creates a stdio stream that
2037 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2038 formatted output directly to an obstack.
2040 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2041 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2043 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2045 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2046 things to your strings.
2048 * There are some new test programs: test-fseek, testmb, and testrand.
2050 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2051 These ports are not finished, but are a good starting place for really
2052 supporting those systems.
2054 * `/etc/localtime' is now the standard location for the file that says what
2055 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2056 This follows the general principle that `/etc' is the place for all local
2057 configuration files.
2059 * The C library header files now use `extern "C"' when used by the C++
2060 compiler, so the C library should now work with C++ code.
2062 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2063 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2066 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2067 function which uses the `merge sort' algorithm, and is said to be
2068 significantly faster than the old GNU `qsort' function. Merge sort is
2069 now the standard `qsort' function. The new algorithm can require a lot
2070 of temporary storage; so, the old sorting function is called when the
2071 required storage is not available.
2073 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2074 provides the Unix `crypt' function, plus some other entry points.
2076 * The code and header files taken from 4.4 BSD have been updated with the
2077 latest files released from Berkeley.
2079 ----------------------------------------------------------------------
2080 Copyright information:
2082 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
2084 Permission is granted to anyone to make or distribute verbatim copies
2085 of this document as received, in any medium, provided that the
2086 copyright notice and this permission notice are preserved,
2087 thus giving the recipient permission to redistribute in turn.
2089 Permission is granted to distribute modified versions
2090 of this document, or of portions of it,
2091 under the above conditions, provided also that they
2092 carry prominent notices stating who last changed them.
2095 version-control: never
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