1 GNU C Library NEWS -- history of user-visible changes. 2012-1-7
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 13526, 13527, 13528, 13529, 13531, 13532, 13533, 13547, 13551, 13552,
17 + define static_assert
21 + declare at_quick_exit and quick_exit also for ISO C11
23 + aligned_alloc. NB: The code is deliberately allows the size parameter
24 to not be a multiple of the alignment. This is a moronic requirement
25 in the standard but it is only a requirement on the caller, not the
30 + uchar.h support added
32 Implemented by Ulrich Drepper.
34 * Support for the IA-64 is removed and could live in ports.
38 * The following bugs are resolved with this release:
40 6779, 6783, 9696, 10103, 10709, 11589, 12403, 12786, 12840, 12847, 12868,
41 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962, 13007,
42 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092, 13096,
43 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179, 13185,
44 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335, 13337,
45 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472, 13484,
46 13506, 13515, 13523, 13524, 13538, 13540
48 * New program pldd to list loaded object of a process
49 Implemented by Ulrich Drepper.
51 * Add nss_db support back to glibc. No more dependency on Berkeley db
52 and support for initgroups lookups.
53 Implemented by Ulrich Drepper.
55 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
58 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
61 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
63 Contributed by Liubov Dmitrieva.
65 * Optimized strchr and strrchr for SSE on x86-32.
66 Contributed by Liubov Dmitrieva.
68 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
69 for x86-64 and x86-32.
70 Contributed by Liubov Dmitrieva.
72 * New interfaces: scandirat, scandirat64
73 Implemented by Ulrich Drepper.
75 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
76 Implemented by Ulrich Drepper.
78 * nscd now also caches the netgroup database.
79 Implemented by Ulrich Drepper.
81 * Integrate libm with gcc's -ffinite-math-only option.
82 Implemented by Ulrich Drepper.
84 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
85 to math functions. Implemented by Ulrich Drepper.
87 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
88 Implemented by Ulrich Drepper.
90 * New Linux interfaces: process_vm_readv, process_vm_writev
92 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
93 Implemented by Ulrich Drepper.
95 * Optimized nearbyint and strcasecmp for PPC.
96 Implemented by Adhemerval Zanella.
98 * New locales: bho_IN, unm_US, es_CU, ta_LK
102 * The following bugs are resolved with this release:
104 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
105 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
106 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
107 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
108 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
109 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
110 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
111 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
112 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
113 12795, 12811, 12813, 12814, 12841
115 * The RPC implementation in libc is obsoleted. Old programs keep working
116 but new programs cannot be linked with the routines in libc anymore.
117 Programs in need of RPC functionality must be linked against TI-RPC.
118 The TI-RPC implementation is IPv6 enabled and there are other benefits.
120 Visible changes of this change include (obviously) the inability to link
121 programs using RPC functions without referencing the TI-RPC library and the
122 removal of the RPC headers from the glibc headers.
123 Implemented by Ulrich Drepper.
125 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
126 syncfs, setns, sendmmsg
128 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
129 yue_HK, lij_IT, mhr_RU
131 * New encodings: CP770, CP771, CP772, CP773, CP774
133 * New program sotruss to trace calls through PLTs
134 Implemented by Ulrich Drepper.
136 * The malloc hook implementation is marked deprecated and will be removed
137 from the default implementation in the next version. The design never
138 worked ever since the introduction of threads. Even programs which do
139 not create threads themselves can use multiple threads created internally.
143 * The following bugs are resolved with this release:
145 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
146 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
147 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
148 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
151 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
153 * POWER7 optimizations: memset, memcmp, strncmp
155 * New optimized string functions for x86-64: strnlen (SSE2),
156 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
157 Implemented by Ulrich Drepper.
161 * The following bugs are resolved with this release:
163 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
164 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
165 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
166 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
167 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
168 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
169 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
170 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
172 * New interfaces: pthread_getname_np, pthread_setname_np
174 * New Linux interface: recvmmsg
176 * STT_GNU_IFUNC implemented for Sparc by David Miller.
178 * The dynamic linker now recognizes supported ABI versions from the
179 EI_ABIVERSION field in the ELF header.
180 Implemented by Ulrich Drepper.
182 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
183 will not be used to fill in password fields in the passwd.byname replies.
184 Instead it is used to synthesize the shadow.byname table, should it be
185 missing. This is a useful mode in some installations involving Solaris.
186 Implemented by Ulrich Drepper.
188 * New locales: kok_IN, sq_MK, cv_RU
192 * The following bugs are resolved with this release:
194 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
195 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
196 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
197 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
198 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
199 10789, 10817, 10823, 10840, 10847
201 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
203 Implemented by Ulrich Drepper.
205 * Checking version of longjmp added that fails if an uninitialized stack
206 frame would be created. Implemented by Ulrich Drepper.
208 * STT_GNU_IFUNC is now supported in static executables.
209 Implemented by H.J. Lu.
211 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
213 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
214 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
215 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
216 Contributed by H.J. Lu.
218 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
219 Implemented by Ulrich Drepper.
221 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
223 Contributed by H.J. Lu.
225 * Support for fma instruction in AVX on x86-64.
226 Implemented by H.J. Lu and Ulrich Drepper.
228 * AVX support in x86-64 auditing support in ld.so.
229 Implemented by H.J. Lu.
231 * STB_GNU_UNIQUE support added.
232 Implemented by Ulrich Drepper.
234 * Implement second fallback mode for optimized DNS lookup for even more
235 broken environments. If two requests from the same port are not
236 handled correctly close the socket and open a new one before sending
237 the second request. The 'single-request-reopen' option in /etc/resolv.conf
238 can be used to select this mode right away, instead of rediscovering the
239 necessity is every process again.
240 Implemented by Ulrich Drepper.
242 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
243 Implemented by Adam Tkac.
245 * Optimized iconv conversions for S390x.
246 Implemented by Andreas Krebbel.
248 * Using condvars with PI mutexes is now more efficient due to kernel
249 support for requeueing to PI futexes. NPTL support added for x86-64.
250 Implemented by Ulrich Drepper.
252 * New locales: ps_AF, my_MM
256 * The following bugs are resolved with this release:
258 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
259 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
260 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
261 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
262 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
264 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
265 Implemented by Ulrich Drepper.
267 * New Linux interfaces: accept4, fallocate, fallocate64.
268 Implemented by Ulrich Drepper.
270 * Correct declarations of string function when used in C++ code. This
271 could lead to compile errors for invalid C++ code.
273 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
276 * New POSIX 2008 interface: psiginfo
277 Implemented by Ulrich Drepper.
279 * New ISO C++1x interfaces: quick_exit, at_quick_exit
280 Implemented by Ulrich Drepper.
282 * Support for selecting between multiple function definitions at runtime
283 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
285 * The libcrypt library can now use the hash function implementations in
286 NSS. Implemented by Ulrich Drepper.
288 * The malloc implementation can be compiled to be less memory efficient
289 but higher performing in multi-threaded programs.
290 Implemented by Ulrich Drepper.
292 * New locales: nan_TW@latin, ks_IN
294 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
295 Implemented by Ulrich Drepper.
297 * Extended printf hook support. It is possible to use user-defined types
298 and extend existing format specifiers.
299 Implemented by Ulrich Drepper.
301 * Handling for group shadow files has been added.
302 Implemented by Ulrich Drepper.
304 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
305 servers (the case, e.g., for some people using the built-in DNS
306 server in ADSL modems/routers). There is a once-per-process timeout
307 in case of a broken server. To avoid it, users can run nscd or put
308 'options single-request' in /etc/resolv.conf.
309 Implemented by Ulrich Drepper.
313 * The following bugs are resolved with this release:
315 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
316 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
317 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
318 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
319 6968, 6974, 6980, 6995, 7008, 7009, 7029
321 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
322 up at the same time. Implemented by Ulrich Drepper.
324 * TLS descriptors for LD and GD on x86 and x86-64.
325 Implemented by Alexandre Oliva.
327 * getaddrinfo now handles DCCP and UDPlite.
328 Implemented by Ulrich Drepper.
330 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
331 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
332 Implemented by Ulrich Drepper.
334 * New implementation of memmem, strstr, and strcasestr which is O(n).
335 Implemented by Eric Blake.
337 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
339 * Implement "e" option for popen to open file descriptor with the
340 close-on-exec flag set. Implemented by Ulrich Drepper.
342 * Implement "b" mode for fmemopen. In this mode writes writes don't
343 implicitly add a NUL byte and seeks from the end of the buffer really
344 use the buffer end, not the string length as the basis.
345 Implemented by Ulrich Drepper.
347 * Many functions, exported and internal, now atomically set the close-on-exec
348 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
350 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
352 Implemented by Pravin Satpute.
354 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
358 * The following bugs are resolved with this release:
360 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
361 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
362 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
363 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
364 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
365 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
366 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
368 * New locales: bo_CN, bo_IN, shs_CA.
370 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
372 * Sorting rules for some Indian languages (Devanagari and Gujarati).
373 Implemented by Pravin Satpute.
375 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
377 * nscd caches now all timeouts for DNS entries
378 Implemented by Ulrich Drepper.
380 * nscd is more efficient and wakes up less often.
381 Implemented by Ulrich Drepper.
383 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
384 vdprintf, and obstack_vprintf.
385 Implemented by Jakub Jelinek.
387 * Faster memset for x86-64.
388 Implemented by Harsha Jagasia and H.J. Lu.
390 * Faster memcpy on x86.
391 Implemented by Ulrich Drepper.
393 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
394 Implemented by Ulrich Drepper.
396 * Faster sqrt and sqrtf implemention for some PPC variants.
397 Implemented by Stephen Munroe.
401 * The following bugs are resolved with this release:
403 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
404 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
405 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
406 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
407 5071, 5103, 5104, 5112, 5113, 5184, 5186
409 * More checking functions: fread, fread_unlocked, open*, mq_open.
410 Implemented by Jakub Jelinek and Ulrich Drepper.
412 * Extend fortification to C++. Implemented by Jakub Jelinek.
414 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
415 by not recognizing 'a' as a modifier when those specs are requested.
416 Implemented by Jakub Jelinek.
418 * PPC optimizations to math and string functions.
419 Implemented by Steven Munroe.
421 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
422 options to be passed. Implemented by Ulrich Drepper.
424 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
426 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
427 Implemented by Ulrich Drepper.
429 * Handle private futexes in the NPTL implementation.
430 Implemented by Jakub Jelinek and Ulrich Drepper.
432 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
433 Implemented by Roland McGrath and Ulrich Drepper.
435 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
437 * SHA-256 and SHA-512 based password encryption.
438 Implemented by Ulrich Drepper.
440 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
441 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
444 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
445 Implemented by Ulrich Drepper.
449 * The following bugs are resolved with this release:
451 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
452 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
453 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
454 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
455 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
456 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
457 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
460 * New Linux interfaces: epoll_pwait, sched_getcpu.
462 * New generic interfaces: strerror_l.
464 * nscd can now cache the services database. Implemented by Ulrich Drepper.
468 * The following bugs are resolved with this release:
470 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
471 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
472 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
473 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
474 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
475 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
476 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
477 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
478 3225, 3251, 3252, 3253, 3273
480 * For Linux, the sorting of addresses returned by getaddrinfo now also
481 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
482 Implemented by Ulrich Drepper.
484 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
485 Implemented by Ulrich Drepper.
487 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
489 * New iconv module for MIK. Contributed by Alexander Shopov.
491 * For sites with broken group and/or passwd database, the auto-propagate
492 option of nscd can prevent creating ID lookup entries from the results
493 of a name lookup and vice versa. This usually is no problem but some
494 site might have problems with the default behavior.
495 Implemented by Ulrich Drepper.
497 * Iterating over entire database in NIS can be slow. With the
498 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
499 to trade time for memory. The entire database will be read at once.
500 Implemented by Ulrich Drepper.
502 * The interfaces introduced in RFC 3542 have been implemented by
505 * Support for the new ELF hash table format was added by Ulrich Drepper.
507 * Support for priority inheritance mutexes added by Jakub Jelinek and
510 * Support for priority protected mutexes added by Jakub Jelinek.
512 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
513 or_IN, csb_PL, fy_NL, sr_ME.
517 * More overflow detection functions.
519 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
520 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
522 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
523 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
524 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
525 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
526 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
527 by Masahide Washizawa.
529 * It is now possible to install audit libraries for the dynamic linker using
530 LD_AUDIT. Implemented by Ulrich Drepper.
532 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
533 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
534 For a libc and libpthread that works well on Linux 2.4 kernels, we
535 recommend using the stable 2.3 branch.
537 * The new function open_wmemstream acts like open_memstream,
538 but uses a wchar_t wide character buffer.
540 * The new function ppoll is an improved version of poll, similar to pselect.
542 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
543 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
544 renameat, unlinkat, linkat, symlinkat, readlinkat.
546 * New Linux kernel system calls: unshare,
547 inotify_init, inotify_add_watch, inotify_rm_watch.
549 * The euidaccess function is now also known by the alias eaccess,
550 for compatibility with some other systems.
552 * Timezone data updated to 2006b version.
556 * The following bugs are resolved with this release:
558 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
559 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
560 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
561 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
562 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
563 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
565 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
567 * As of this release, GCC 4 can be used to compile the C Library.
569 * Timezone data updated to 2005m version.
573 * The following bugs are resolved with this release:
575 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
576 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
577 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
578 777, 787, 821, 822, 823, 825
580 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
584 * Support for RFC 3678. Real implementations exist only for Linux so far.
585 Implemented by Ulrich Drepper.
587 * nscd can now cache entries persistently. Expiring entries are reloaded.
588 For speedups the cache can be shared in memory with client processes.
589 Implemented by Ulrich Drepper.
591 * nscd can now perform SELinux checks.
592 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
594 * getaddrinfo queries are now cached. Canonical name lookup is performed
596 Implemented by Ulrich Drepper.
598 * The nothrow function attribute is used when headers are used by gcc when
599 compiling C code. This can avoid significant amounts of exception
602 * The malloc functions perform more error checking and are stricter when
603 it comes to reacting on errors. The default action is to terminate
604 the process after showing an error message. Implemented by Ulrich Drepper.
606 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
607 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
609 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
610 namespaces using the new function dlmopen(). This feature is of course,
611 like most other dynamic loading functionality, not available in statically
612 linked applications. Implemented by Ulrich Drepper.
614 * Low-overhead boundary checking variants of string and some stdio functions
615 were added. These are to be used in conjunction with a gcc patch by
616 Jakub Jelinek which adds calls to these functions if possible.
617 Implemented by Jakub Jelinek and Ulrich Drepper.
619 * Old code for several operating systems and machine architectures that
620 have not been in working condition in a long time have been removed from
621 the main source tree maintained by the GNU C Library's maintainers.
622 These files are now reside in the separate `ports' source module
623 that is usable as an add-on when building the library.
627 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
628 interrogate the dynamic linker, compatible with the Solaris interface.
630 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
631 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
633 * getifaddrs now uses the netlink interface on Linux to get its information.
634 Implemented by Thorsten Kukuk.
636 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
637 Implemented by Ulrich Drepper.
639 * support for non-executable stacks on x86 has been added. Changes mostly
642 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
645 * getaddrinfo now performs destination address selection according to
650 * Thread-safe interfaces for many functions that access locale data
651 were added in version 2.3, but these features were omitted from NEWS.
652 Many functions have variants with an `_l' suffix that take a `locale_t'
653 object as a parameter rather than consulting the current locale.
654 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
655 create and maintain `locale_t' objects. Additionally, the new function
656 `uselocale' sets "the current locale" (as used by functions not so
657 parameterized) set for an individual thread. These features were added
658 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
660 * The functions getresuid, getresgid, setresuid, and setresgid, which
661 have long been available on Linux, are now declared in <unistd.h>
662 and are now also available on the Hurd.
664 * ELF thread-local storage support (TLS) now works on x86-64.
666 * The new dynamic string token $LIB is expanded in shared library names.
667 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
669 * Aldy Hernandez contributed complete software floating point support for
670 PowerPC machines with no FPU.
672 * fexecve is implemented on Linux.
674 * The `btowc' function should work at least twice as fast due to
675 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
677 * With approriate thread add-ons cancelable functions are now implemented
678 in libc.so as well. No need to call the function in libpthread. This
679 change allowed to finally disable the incorrect and expensive handling
680 of weak definition in ld.so.
682 * Yet more PLT entries in libc.so have been removed. We finally arrived
683 at the bare minimum. Startup times improved appropriately.
685 * Support for the new Linux/x86 system call interface was added. The
686 AT_SYSINFO auxiliary vector entry is recognized and handled.
690 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
693 * iconv (the program and the interface) now accepts empty names (excluding
694 options like //TRANSLIT) to mean "use charset of current locale".
696 * localedef can now transliterate characters in strings which are not in
697 the provided charmap. The information from the input locale is used.
699 * Prelinking support was added for ELF targets. This requires additional
700 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
702 * Read-only stdio streams now use mmap to speed up operation by eliminating
703 copying and buffer underflows. To use add 'm' to the mode string of
704 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
706 * The malloc functions were completely rewritten by Wolfram Gloger based
707 on Doug Lea's malloc-2.7.0.c.
709 * Isamu Hasegawa contributed a completely new and POSIX-conformant
710 implementation of regex.
712 * Bruno Haible upgraded the iconv and locale implementation to support
715 * Contents of the LC_* and LANG environment variables in the CEN style are
716 not recognized anymore. It never was used. Change by Ulrich Drepper.
718 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
719 thread-local storage (TLS) ABI on some platforms.
720 Changes by Ulrich Drepper. SH support by Kaz Kojima.
722 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
723 EUC-JISX0213, and TSCII.
725 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
726 BSD-compatible interface for getting all network interface addresses.
727 Implementation for IPv4 by Roland McGrath.
729 * Loading of locale data is faster due to the introduction of a locale
730 archive. Implemented by Roland McGrath and Ulrich Drepper.
732 * Startup times are significantly reduced by not using exported functions
733 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
736 * Steven Munroe contributed a port to PowerPC64/Linux.
740 * The Hurd now uses the GNU libio implementation of stdio rather than the
741 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
743 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
744 with the same behavior as the Linux system call of the same name.
748 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
749 128-bit long double format.
751 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
752 IBM1161, and IBM1162 charsets.
754 * Andreas Jaeger contributed a port to x86-64/Linux.
756 * Peter Bruin contributed a port to PowerPC/Hurd.
758 * libc functions using I/O streams now can handle wide-oriented streams
761 * optimizations in the dynamic linker. Binaries created by recent binutils
762 versions start up quicker due to reduced time spent on relocations.
764 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
768 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
769 asinh, atanh, j0 for the 128-bit long double format.
771 * Bruno Haible updated all the code handling Unicode in some form to
774 * Speed of regex for single-byte locales is back to previous levels.
775 Patch by Isamu Hasegawa.
777 * Alpha, SPARC, and IA-64 now also using floating stacks.
779 * Startup time of internationalized applications greatly improved through
780 iconv cache. Use iconvconfig to generate the cache file.
781 Contributed by Ulrich Drepper.
783 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
784 severe performance problems. Patch by David Mosberger.
786 * The Hurd port got a lot more functionality like AIO, various stdio
787 extensions, etc. Mainly done by Roland McGrath.
789 * mtrace can now lookup symbols in shared libraries.
793 * Intel's IA-64 math library is largely integrated. It provides fast and
794 accurate implementatations for most basic and standard math functions
795 in float, double, and long double format.
797 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
798 and asin for the 96-bit long double format and asin, log, tan for the
799 128-bit long double format.
801 * The beginning of a last-bit accurate math library by IBM Haifa were added.
802 The basic double functions exist today. Contributed by Abraham Ziv
803 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
804 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
806 * An asynchronous name lookup library was added. The interface is designed
807 after POSIX AIO. The proposal was circulated beforehand to get comments.
808 No negative ones came in. Implemented by Ulrich Drepper.
810 * Port to S390/64bit contributed by Martin Schwidefsky
811 <schwidefsky@de.ibm.com>.
813 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
814 of functions for Linux/IA-64.
816 * The RPC code is now thread safe. Threads can now use the same service
817 of different services at the same time. Patch by Eric Norum
818 <eric.norum@usask.ca> with some help by Ulrich Drepper.
820 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
821 family of functions for Linux/S390.
823 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
824 of functions for Linux/x86.
826 * Port to Linux/CRIS contributed by Axis Communications.
830 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
831 we can now check for namespace violations and missing declarations. The
832 result is that almost all headers are now Unix-compliant (as defined in
833 the upcoming XPG6). The negative side is that some programs might need
834 corrections, too, if they depend on the incorrect form of the headers in
835 previous versions which defined too many symbols and included too many
838 * regex now handles multibyte character sets correctly.
839 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
841 * iconv (the program) does now conform to the upcoming XPG6 and handles
842 charmaps. Instead of the charset names the path of charmaps can be
843 provided and the conversion happens based on this data.
844 Contributed by Ulrich Drepper.
846 * The locale program now provides detailed information about the installed
851 only lists the names of the supported locales
855 provides details such as country, language, and codeset name.
856 Contributed by Ulrich Drepper.
860 * The gencat program now parses the input file according to the charset
861 selected by the LC_CTYPE category. This is important for stateful
862 character sets. To make generating catalogs easier there is a way
863 to overwrite the charset selected by the locale: before the first
864 message or $ quote line the catalog can contain a line like
868 to select the charset (ISO-8859-2 in this case).
870 Implemented by Shinya Hanataka and Ulrich Drepper.
872 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
873 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
874 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
876 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
877 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
879 * The LANGUAGE environment variable is now ignored unless the locale is
880 changed from the default "C" locale.
882 * The usual bug fixes.
886 * Greg McGary added runtime support for bounds checking using gcc's
887 new -fbounded-pointers option. ix86 target is complete. PowerPC
890 * Thorsten Kukuk added secure mode support to nscd.
892 * The Berkeley db libraries have been removed.
894 Related, the nss_db module is now in a separate package since it
895 obviously requires a database library being available.
897 * Wide character I/O streams implemented by Ulrich Drepper.
899 * Functions from the extended socket API added by Ulrich Drepper.
901 * Functions feenableexcept and fedisableexcept to control the
902 behaviour of individual exceptions have been added by Andreas Jaeger.
904 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
906 * The resolver code has been updated from bind 8.2.3-T5B which supports
907 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
910 This change could in some situations effect backward compatibility. Since
911 now `_res' is a thread-local instead of a global variable, modifying it
912 in one thread does not have any effect in other threads.
914 The resolver library was also extended to allow IPv6 as the transport
915 protocol for the requests. This work was done by Stig Venaas.
917 * Compatibility code for K&R C compilers has been removed from the
918 header files. A ISO C compiler is needed to use the library
919 (conforming to either C89 or C99 standard).
921 * Complete rewrite of the localedef program to support multibyte character
922 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
923 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
924 Implemented by Ulrich Drepper.
926 Bruno Haible significantly improved the generation and use of the data
927 structures for the wide character tables.
929 * Plural handling in gettext implemented by Ulrich Drepper.
931 * The utmp daemon has been removed.
933 * The port to MIPS-Linux has been finished by Andreas Jaeger.
935 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
938 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
940 * POSIX barriers implemented by Kaz Kylheku.
942 * POSIX spawn function family implemented by Ulrich Drepper.
944 * POSIX spinlocks are now available.
946 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
948 * the configure option --enable-kernel=X.Y.Z allows to strip out
949 compatibility for kernel versions before X.Y.Z. This is currently only
950 implemented for Linux.
952 * the sockaddr_in6 structure changed. The IPv6 working group added a new
953 field sin6_scope_id. This means that all programs using IPv6 should be
954 recompiled. Don't expect binary compatibility with previous glibc
957 * various conversion modules for IBM character sets contributed by
960 * IA-64 port by Jes Sorensen and HJ Lu.
962 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
963 Compiling the GNU C Library for Linux/ia64
964 ******************************************
966 Please refer to the file INSTALL in the same directory as you found
967 this file for general information about configuring and compiling
970 For general inquiries about glibc under Linux/ia64 please use the
971 following mailing list linux-ia64@linuxia64.org or one of the relevant
974 Recommended Tools for Compilation
975 =================================
977 In order for glibc-2.2 to build correctly on the ia64 you need at
978 least the following versions of the GNU tools (the :
980 * The Cygnus toolchain snapshot for the ia64 as of August 4
981 including the provided set of patches. It is however recommend
982 you use the October 24 toolchain snapshot or a more recent version.
984 OR alternatively you can try the following (the Cygnus toolchain is
985 the recommended solution):
987 * GCC and binutils, GAS and GNU LD out of CVS from
988 sources.redhat.com as of August 28, 2000 or later. The CVS tree
989 may require special patches to work properly on the ia64.
991 Configuring and compiling GNU Libc for Linux/ia64
992 =================================================
994 The library requires Linux kernel version 2.4.0-test4-000728 or
995 later to funtion properly. Besides that it support for debug libraries
996 is currently untested. Hence the following options
997 are required for configuring the library:
999 --disable-debug --enable-kernel=2.4.0
1001 It is also important that you make sure the library picks up the
1002 appropriate kernel header files, if you do not have recent enough
1003 kernel headers in /usr/src/linux/include, you should use the
1004 --with-headers=<path> option to specify the location.
1006 As an example I personally use the following options to configure
1011 --enable-kernel=2.4.0
1013 --enable-add-ons=yes
1015 --with-headers=/home/jes/linux/include
1020 Jes Sorensen <jes@linuxcare.com>,
1022 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1036 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1038 * New xdr functions are added; some rpc functions are now 64bit clean.
1040 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1042 * Fixed known incompatibilities with glibc 2.0.
1044 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1046 * Optimized a number of functions (especially the ELF dynamic loader).
1048 * Update timezone data files.
1050 * lots of charmaps corrections
1052 * some new locale definitions and charmaps
1057 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1058 conform to POSIX member type requirements. Symbol versions have been
1059 adjusted as needed within the library, and for direct use by applications,
1060 but there is potential for problems if third-party libraries use
1061 struct timeval as part of their interface. This does not present
1062 a problem for X and other "essential" system libraries.
1064 * An additional locale model to support C++ Standard Library locale
1065 model and probably more was implemented by Ulrich Drepper.
1067 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1070 * Miles Bader provided the `argp' function family to support hierachical
1071 command line argument parsing, layered on top of getopt.
1073 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1075 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1078 * scanf recognizes the %a and %A format for scanning floating point numbers.
1080 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1081 information and interfaces for the available integer types.
1083 * about 130 new math functions were added to implement the ISO C9x math
1086 * the new header <complex.h> contains definitions of the complex math
1087 functions from ISO C 9X.
1089 * the new header <tgmath.h> defines generic macros to use complex or
1090 real valued functions.
1092 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1094 * Andreas Jaeger provided a test suite for the math library.
1096 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1098 * Ulrich Drepper added character set conversion functions (iconv).
1100 * Optimized string functions have been added.
1102 * The localedata addon is now part of glibc.
1104 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1106 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1107 daemon for NSS (nscd).
1109 Missing a better place here are some numbers on improvements. Under
1110 Linux 2.1.125 un-tar-ing the kernel sources takes
1114 using local files 12.19s 6.88s 22.91s
1116 using NIS 13.92s 8.91s 26.34s
1118 using NIS & nscd 10.37s 7.34s 25.30s
1120 using NIS+ 27.57s 30.37s 640.46s
1122 using NIS+ & nscd 10.25s 7.83s 26.51s
1124 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1126 Keep in mind that non-namelookup related operations dominate above times.
1127 It was just a common complain that using NIS+ unpacking the kernel is
1130 [1] The old nscd implementation is not available anymore since it was
1131 distributed with glibc up to version 2.0.98 and thus is now replaced.
1133 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1135 * Mark Kettenis provided a Hesiod NSS module.
1137 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1138 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1140 * rcmd can now handle netgroups (Dick Streefland).
1142 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1145 * Support for the IPv6 protocol has been added to the socket API, as per the
1146 latest draft standards.
1148 * Support for Linux 2.2 has been added.
1150 * Interface changes relative to the latest 2.0.x release:
1151 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1152 addseverity NEW: Unix98
1153 alphasort64 NEW: LFS
1154 argp_err_exit_status NEW: argp, GNU ext
1155 argp_error NEW: argp, GNU ext
1156 argp_failure NEW: argp, GNU ext
1157 argp_help NEW: argp, GNU ext
1158 argp_parse NEW: argp, GNU ext
1159 argp_program_bug_address NEW: argp, GNU ext
1160 argp_program_version NEW: argp, GNU ext
1161 argp_program_version_hook NEW: argp, GNU ext
1162 argp_state_help NEW: argp, GNU ext
1163 argp_usage NEW: argp, GNU ext
1164 authdes_create NEW: Secure RPC
1165 authdes_getucred NEW: Secure RPC
1166 authdes_pk_create NEW: Secure RPC
1167 backtrace NEW: GNU ext.
1168 backtrace_symbols NEW: GNU ext.
1169 backtrace_symbols_fd NEW: GNU ext.
1171 cacosf NEW: ISO C 9x
1172 cacosh NEW: ISO C 9x
1173 cacoshf NEW: ISO C 9x
1174 cacoshl NEW: ISO C 9x
1175 cacosl NEW: ISO C 9x
1182 casinf NEW: ISO C 9x
1183 casinh NEW: ISO C 9x
1184 casinhf NEW: ISO C 9x
1185 casinhl NEW: ISO C 9x
1186 casinl NEW: ISO C 9x
1188 catanf NEW: ISO C 9x
1189 catanh NEW: ISO C 9x
1190 catanhf NEW: ISO C 9x
1191 catanhl NEW: ISO C 9x
1192 catanl NEW: ISO C 9x
1193 cbc_crypt NEW: Secure RPC
1197 ccoshf NEW: ISO C 9x
1198 ccoshl NEW: ISO C 9x
1204 cimagf NEW: ISO C 9x
1205 cimagl NEW: ISO C 9x
1206 clearerr_locked REMOVED
1207 clntunix_create NEW: sunrpc ext
1209 clog10 NEW: ISO C 9x
1210 clog10f NEW: ISO C 9x
1211 clog10l NEW: ISO C 9x
1221 cprojf NEW: ISO C 9x
1222 cprojl NEW: ISO C 9x
1224 crealf NEW: ISO C 9x
1225 creall NEW: ISO C 9x
1230 csinhf NEW: ISO C 9x
1231 csinhl NEW: ISO C 9x
1234 csqrtf NEW: ISO C 9x
1235 csqrtl NEW: ISO C 9x
1239 ctanhf NEW: ISO C 9x
1240 ctanhl NEW: ISO C 9x
1242 des_setparity NEW: Secure RPC
1243 ecb_crypt NEW: Secure RPC
1244 endutxent NEW: Unix98
1246 exp10f NEW: ISO C 9x
1247 exp10l NEW: ISO C 9x
1251 fattach NEW: STREAMS
1252 fdetach NEW: STREAMS
1256 feclearexcept NEW: ISO C 9x
1257 fegetenv NEW: ISO C 9x
1258 fegetexceptflag NEW: ISO C 9x
1259 fegetround NEW: ISO C 9x
1260 feholdexcept NEW: ISO C 9x
1262 feraiseexcept NEW: ISO C 9x
1263 ferror_locked REMOVED
1264 fesetenv NEW: ISO C 9x
1265 fesetexceptflag NEW: ISO C 9x
1266 fesetround NEW: ISO C 9x
1267 fetestexcept NEW: ISO C 9x
1268 feupdateenv NEW: ISO C 9x
1269 fflush_locked REMOVED
1273 fgets_unlocked NEW: GNU ext.
1274 fileno_locked REMOVED
1286 fputc_locked REMOVED
1287 fputs_unlocked NEW: GNU ext.
1288 fread_unlocked NEW: GNU ext.
1293 fstatvfs NEW: Unix98
1297 ftruncate64 NEW: LFS
1299 fwrite_unlocked NEW: GNU ext.
1300 gai_strerror NEW: IPv6
1304 getchar_locked REMOVED
1306 getdate_err NEW: Unix98
1307 getdate_r NEW: GNU ext.
1309 getnameinfo NEW: IPv6
1310 getnetname NEW: Secure RPC
1311 getpmsg NEW: STREAMS
1312 getpt NEW: Unix98 PTY
1313 getrlimit64 NEW: LFS
1314 getutxent NEW: Unix98
1315 getutxid NEW: Unix98
1316 getutxline NEW: Unix98
1317 glob64 NEW: GNU ext.
1318 globfree64 NEW: GNU ext.
1319 gnu_get_libc_release NEW: GNU ext.
1320 gnu_get_libc_version NEW: GNU ext.
1321 grantpt NEW: Unix98 PTY
1322 host2netname NEW: Secure RPC
1324 iconv_close NEW: iconv
1325 iconv_open NEW: iconv
1326 if_freenameindex NEW: IPv6
1327 if_indextoname NEW: IPv6
1328 if_nameindex NEW: IPv6
1329 if_nametoindex NEW: IPv6
1330 in6addr_any NEW: IPv6
1331 in6addr_loopback NEW: IPv6
1332 inet6_isipv4mapped NEW: IPv6
1333 isastream NEW: STREAMS
1334 iswblank NEW: GNU ext.
1335 key_decryptsession NEW: Secure RPC
1336 key_decryptsession_pk NEW: Secure RPC
1337 key_encryptsession NEW: Secure RPC
1338 key_encryptsession_pk NEW: Secure RPC
1339 key_gendes NEW: Secure RPC
1340 key_get_conv NEW: Secure RPC
1341 key_secretkey_is_set NEW: Secure RPC
1342 key_setnet NEW: Secure RPC
1343 key_setsecret NEW: Secure RPC
1344 llrint NEW: ISO C 9x
1345 llrintf NEW: ISO C 9x
1346 llrintl NEW: ISO C 9x
1347 llround NEW: ISO C 9x
1348 llroundf NEW: ISO C 9x
1349 llroundl NEW: ISO C 9x
1354 lrintf NEW: ISO C 9x
1355 lrintl NEW: ISO C 9x
1356 lround NEW: ISO C 9x
1357 lroundf NEW: ISO C 9x
1358 lroundl NEW: ISO C 9x
1360 makecontext NEW: Unix98
1361 mempcpy NEW: GNU ext.
1364 modify_ldt NEW: kernel
1368 nearbyint NEW: ISO C 9x
1369 nearbyintf NEW: ISO C 9x
1370 nearbyintl NEW: ISO C 9x
1371 netname2host NEW: Secure RPC
1372 netname2user NEW: Secure RPC
1373 nexttoward NEW: ISO C 9x
1374 nexttowardf NEW: ISO C 9x
1375 nexttowardl NEW: ISO C 9x
1379 passwd2des NEW: Secure RPC
1381 pow10f NEW: GNU ext.
1382 pow10l NEW: GNU ext.
1385 printf_size NEW: GNU ext.
1386 printf_size_info NEW: GNU ext.
1387 profil_counter REMOVED
1388 pthread_mutexattr_getkind_np REPLACED
1389 pthread_mutexattr_setkind_np REPLACED
1390 ptsname NEW: Unix98 PTY
1391 ptsname_r NEW: Unix98 PTY
1393 putchar_locked REMOVED
1394 putgrent NEW: GNU ext.
1396 putpmsg NEW: STREAMS
1397 pututxline NEW: Unix98
1401 readdir64_r NEW: LFS
1402 remquo NEW: ISO C 9x
1403 remquof NEW: ISO C 9x
1404 remquol NEW: ISO C 9x
1406 roundf NEW: ISO C 9x
1407 roundl NEW: ISO C 9x
1409 scalbln NEW: ISO C 9x
1410 scalblnf NEW: ISO C 9x
1411 scalblnl NEW: ISO C 9x
1413 sendfile NEW: kernel
1414 setcontext NEW: Unix98
1415 setrlimit64 NEW: LFS
1416 setutxent NEW: Unix98
1418 sigignore NEW: Unix98
1419 sigqueue NEW: POSIX.1b
1420 sigrelse NEW: Unix98
1421 sigset NEW: POSIX.1b
1422 sigtimedwait NEW: POSIX.1b
1423 sigwaitinfo NEW: POSIX.1b
1424 sincos NEW: GNU ext.
1425 sincosf NEW: GNU ext.
1426 sincosl NEW: GNU ext.
1430 strcasestr NEW: GNU ext.
1431 strtoimax NEW: ISO C 9x
1432 strtoumax NEW: ISO C 9x
1433 strverscmp NEW: GNU ext.
1434 svcauthdes_stats NEW: Secure RPC
1435 svcunix_create NEW: sunrpc etx
1436 svcunixfd_create NEW: sunrpc ext
1437 swapcontext NEW: Unix98
1438 tcgetsid NEW: Unix98 PTY
1439 tdestroy NEW: GNU ext.
1440 tgamma NEW: ISO C 9x
1441 tgammaf NEW: ISO C 9x
1442 tgammal NEW: ISO C 9x
1446 truncf NEW: ISO C 9x
1447 truncl NEW: ISO C 9x
1449 unlockpt NEW: Unix98 PTY
1450 updwtmpx NEW: Unix98
1451 user2netname NEW: Secure RPC
1452 utmpxname NEW: Unix98
1453 versionsort NEW: GNU ext.
1454 versionsort64 NEW: GNU ext.
1456 wcscasecmp NEW: GNU ext.
1457 wcsncasecmp NEW: GNU ext.
1458 wcsnlen NEW: GNU ext.
1459 wcstoimax NEW: ISO C 9x
1460 wcstoll NEW: ISO C 9x
1461 wcstoull NEW: ISO C 9x
1462 wcstoumax NEW: ISO C 9x
1464 wordexp NEW: POSIX.2
1465 wordfree NEW: POSIX.2
1466 write_profiling REMOVED
1467 xdecrypt NEW: Secure RPC
1468 xdr_authdes_cred NEW: Secure RPC
1469 xdr_authdes_verf NEW: Secure RPC
1470 xdr_cryptkeyarg NEW: Secure RPC
1471 xdr_cryptkeyarg2 NEW: Secure RPC
1472 xdr_cryptkeyres NEW: Secure RPC
1473 xdr_getcredres NEW: Secure RPC
1474 xdr_key_netstarg NEW: Secure RPC
1475 xdr_key_netstres NEW: Secure RPC
1476 xdr_keybuf NEW: Secure RPC
1477 xdr_keystatus NEW: Secure RPC
1478 xdr_netnamestr NEW: Secure RPC
1479 xdr_sizeof NEW: Secure RPC
1480 xdr_unixcred NEW: sunrpc ext
1481 xencrypt NEW: Secure RPC
1482 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1493 * inet_ntoa is thread-safe
1495 * updwtmp is moved from libutil to libc
1497 * rewrite of cbrt function
1499 * update of timezone data
1513 * add atoll function
1515 * fix complex problems in Berkeley DB code
1517 * fix math functions
1521 * fixed lots of header problems (especially Linux/GNU specific)
1523 * dynamic loader preserves all registers
1525 * Roland McGrath provided support for handling of auxiliary objects in
1526 the ELF dynamic loader.
1528 * support for parallel builds is improved
1532 * GNU extensions are no longer declared by default. To enable them you
1533 must define the macro `_GNU_SOURCE' in your program or compile with
1536 * The library has changed from using GNU ld symbol aliases to using weak
1537 symbols where available. The ELF object file format supports weak
1538 symbols; GNU ld also supports weak symbols in the a.out format. (There
1539 is also now support for other GNU ld extensions in ELF. Use the
1540 `--with-elf' option to configure to indicate you have ELF, and
1541 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1542 of many files which contained only symbol aliases, reducing the size of
1543 the source and the compiled library; many other files were renamed to
1544 less cryptic names previously occupied by the symbol alias files.
1545 There is a new header file <elf.h> for programs which operate on
1546 files in the ELF format.
1548 * Converted to Autoconf version 2, so `configure' has more options.
1549 Run `configure --help' to see the details.
1551 * The library can now be configured to build profiling, highly-optimized
1552 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1553 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1554 `configure' enable building these extra libraries. The shared library is
1555 built by default when using both ELF and GNU ld. When shared libraries
1556 are enabled, the new library `-ldl' is available for arbitrary run-time
1557 loading of shared objects; its interface is defined in <dlfcn.h>. The
1558 new header file <link.h> gives access to the internals of the run-time
1559 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1560 application of same name on other systems and it provides information
1561 about dynamically linked binaries.
1563 * The C library now provides the run-time support code for profiling
1564 executables compiled with `-pg'. Programs can control the profiling code
1565 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1566 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1567 the support for this file format was contributed by David Mosberger-Tang.
1569 * The math code has been replaced with a math library based on fdlibm from
1570 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1571 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1572 functions. The math functions now reside in a separate library, so
1573 programs using them will need to use `-lm' their linking commands.
1575 * John C. Bowman contributed optimized ix87 assembler inline functions.
1577 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1578 mechanism similar to that found in Solaris 2. This is now used for the
1579 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1580 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1581 file controls what services are used for each individual database. This
1582 works by loading shared libraries with names specified in `nsswitch.conf',
1583 so service modules can be changed or added at any time without even
1584 relinking any program. Currently there are the file, db, and NIS based
1585 NSS services available.
1587 * The new functions `strtoq' and `strtouq' parse integer values from
1588 strings, like `strtol' and `strtoul', but they return `long long int' and
1589 `unsigned long long int' values, respectively (64-bit quantities).
1591 * The new functions `strtof' and `strtold' parse floating-point values from
1592 strings, like `strtod', but they return `float' and `long double' values,
1593 respectively (on some machines `double' and `long double' are the same).
1595 * Ulrich Drepper has contributed new implementations of the floating-point
1596 printing and reading code used in the `printf' family of functions and
1597 `strtod', `strtof', and `strtold'. These new functions are perfectly
1598 accurate, and much faster than the old ones.
1600 * The implementation of the POSIX locale model was completely rewritten by
1601 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1602 to compile the POSIX locale definition.
1604 * The former dummy implementations of the strcoll and strxfrm function are
1605 now replaced by fully functional code contributed by Ulrich Drepper. The
1606 collation information comes from the POSIX locale definitions.
1608 * The new header <langinfo.h> defines an interface for accessing
1609 various locale-dependent data (using the locale chosen with `setlocale').
1611 * Ulrich Drepper has contributed a new suite of functions for operation on
1612 wide-character and multibyte-character strings, in <wchar.h>;
1613 and classification and case conversion of wide characters, in <wctype.h>.
1614 These new functions are conforming to the ISO C, Amendement 1 specification.
1616 * There is now a second implementation of the standard I/O library available.
1617 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1618 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1620 * You can now use positional parameter specifications in format strings
1621 for the `printf' and `scanf' families of functions. For example,
1622 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1623 ``Number 6, Mr Jones''. This is mainly useful when providing different
1624 format strings for different languages, whose grammars may dictate
1625 different orderings of the values being printed. To support this
1626 feature, the interface for `register_printf_handler' has changed; see
1627 the header file <printf.h> for details.
1629 * The `printf' and `scanf' families of functions now understand a new
1630 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1631 to group numbers as indicated by the locale; for `scanf' and friends, this
1632 says to accept as valid only a number with all the proper grouping
1633 separators in the right places. In the default "C" locale, numbers are
1634 not grouped; but locales for specific countries will define the usual
1635 conventions (i.e. separate thousands with `,' in the US locale).
1637 * The pgrp functions have been regularized, slightly incompatibly but much
1638 less confusingly. The core functions are now `getpgid' and `setpgid',
1639 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1640 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1641 provided for compatibility. There is no longer an incompatible `getpgrp'
1642 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1644 * The new header file <fts.h> and suite of functions simplify programs that
1645 operate on directory trees. This code comes from 4.4 BSD.
1647 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1648 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1649 NSS scheme used in glibc.
1651 * There is a new malloc debugging hook `__memalign_hook'.
1653 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1654 `unsigned int' in <sys/types.h>. These are for compatibility only and
1655 their use is discouraged.
1657 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1658 done differently, so that it works even without GNU ld.
1660 * New function `euidaccess' checks allowed access to a file like `access',
1661 but using the effective IDs instead of the real IDs.
1663 * The time zone data files have been updated for the latest and greatest
1664 local time conventions of the countries of the world.
1666 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1669 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1670 for formatting floating-point numbers. They are provided only for
1671 compatibility; new programs should use `sprintf' instead. There are
1672 also equivalent function for the `long double' floating-point type and
1673 all functions also exist in a reentrant form.
1675 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1676 functions for maintaining the login-record files (primarily of use to
1677 system programs such as `login'), and convenient functions for
1678 allocating and initializing a pseudo-terminal (pty) device.
1680 * Ulrich Drepper has contributed new support for System V style
1681 shared memory and IPC on systems that support it.
1683 * Ulrich Drepper has contributed several miscellaneous new functions found
1684 in System V: The `hsearch' family of functions provide an effective
1685 implementation of hash tables; `a64l' and `l64a' provide a very simple
1686 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1689 * Ulrich Drepper has contributed new reentrant counterparts for the
1690 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1692 * Ulrich Drepper has contributed new, highly-optimized versions of several
1693 string functions for the i486/Pentium family of processors.
1695 * Ulrich Drepper has updated the Linux-specific code, based largely
1696 on work done in Hongjiu Lu's version of GNU libc for Linux.
1697 The GNU library now supports Linux versions 2.0.10 and later,
1698 using the ELF object file format (i[3456]86-*-linux).
1700 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1702 * David Mosberger-Tang and Richard Henderson have ported the C library
1703 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1704 dynamic linking support for ELF/Alpha.
1706 * Richard Henderson contributed several Alpha optimized assembler function
1707 for arithmetic and string handling.
1709 * Ulrich Drepper has contributed a new set of message catalog functions to
1710 support multiple languages using the <libintl.h> interface, for use with
1711 his new package GNU gettext. Translation volunteers have contributed
1712 catalogs of the library's messages in Spanish, German, and Korean.
1714 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1715 program and the `catgets' function for reading the catalog files it
1716 creates. (The <libintl.h> interface is preferred; we include the
1717 <nl_types.h> interface using `catgets' only for source compatibility with
1718 programs already written to use it.)
1720 * New header file <values.h> gives SVID-compatible names for <limits.h>
1723 * Various new macros, declarations, and small header files for compatibility
1726 * New function `group_member' is a convenient way to check if a process has
1727 a given effective group ID.
1729 * When using GCC 2.7 and later, the socket functions are now declared in a
1730 special way so that passing an argument of type `struct sockaddr_in *',
1731 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1732 `struct sockaddr *' type, does not generate a type-clash warning.
1734 * New function `error' declared in header file <error.h> is a convenient
1735 function for printing error messages and optionally exiting; this is the
1736 canonical function used in GNU programs. The new functions `err', `warn',
1737 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1738 doing the same thing.
1740 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1741 POSIX.2 `glob' function to do ~ and {...} expansion.
1743 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1744 `clearenv' which is used in POSIX.9 is also available.
1746 * New function `getsid' returns session ID number on systems that support it.
1748 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1749 files <db.h> and <mpool.h> provide a rich set of functions for several
1750 types of simple databases stored in memory and in files, and <ndbm.h> is
1751 an old `ndbm'-compatible interface using the `db' functions. Link with
1752 `-ldb' to get these functions.
1754 * New macro `strdupa' copies a string like `strdup', but uses local stack
1755 space from `alloca' instead of dynamic heap space from `malloc'.
1757 * New function `strnlen' is like `strlen' but searches only a given maximum
1758 number of characters for the null terminator. `stpncpy', `strndup' and
1759 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1762 * New function `statfs' in header <sys/statfs.h>.
1764 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1765 provide convenient functions for operating on blocks of null-terminated
1768 * A new suite of functions in <utmp.h> handle all the details of reading
1769 and writing the utmp file.
1771 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1774 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1775 completely POSIX compliant and also implemented the extended functionality
1776 to handle alternate digit representation and alternate era date formats.
1778 * Ulrich Drepper provided an implementation of the `strptime' function
1779 defined in XPG4.2 which transforms a string into a `struct tm' value.
1781 * Paul Eggert provided the tzselect shell script as part of the timezone
1782 code. The shell script makes it easy to select the correct timezone
1785 * The implementation of the malloc family of functions is completely replaced
1786 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1787 The implementation uses the mmap function (if available) and it is
1788 optimized for the use in multi threaded programs.
1790 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1791 functions. This new functionality is usable by specifying a special
1792 salt string and it is compatible with implementation on *BSD systems.
1794 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1795 `getsubopt' to handle second level command line options, `bsd_signal'
1796 to access BSD style `signal' functionality, the obsolete `regexp' style
1799 * the `lchown' function is available on system which support this
1802 * The implementation of the shadow password handling function was contributed
1805 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1807 * POSIX.1g support was added. The <sys/select.h> header is available,
1808 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1809 implementation of `getaddrinfo'.
1813 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1815 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1816 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1818 * The new function `daemon' from 4.4 BSD is useful for server programs that
1819 want to put themselves in the background.
1821 * Joel Sherrill has contributed support for several standalone boards that
1822 run without an operating system.
1824 * `printf', `scanf' and friends now accept a `q' type modifier for long
1825 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1827 * All of the code taken from BSD (notably most of the math and networking
1828 routines) has been updated from the BSD 4.4-Lite release.
1830 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1832 * The new functions `getdomainname' and `setdomainname' fetch or change the
1833 YP/NIS domain name. These are system calls which exist on systems which
1836 * The time zone data files have been updated for the latest international
1839 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1840 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1844 * The C library now includes support for Sun RPC, from Sun's free
1845 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1846 are included. (There is still no support for YP.)
1848 * Tom Quinn has contributed a port of the C library to SGI machines running
1849 Irix 4 (mips-sgi-irix4).
1851 * The new `lockf' function is a simplified interface to the locking
1852 facilities of `fcntl', included for compatibility.
1854 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1856 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1858 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1861 * The error message printed by `assert' for a failed assertion now includes
1862 the name of the program (if using GNU ld) and the name of the calling
1863 function (with versions of GCC that support this).
1865 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1867 * The library now includes the <sys/mman.h> header file and memory
1868 management functions `mmap', `munmap', `mprotect', `msync', and
1869 `madvise', on systems that support those facilities.
1871 * The interface for `mcheck' has changed slightly: the function called to
1872 abort the program when an allocation inconsistency is detected now takes
1873 an argument that indicates the type of failure. The new function
1874 `mprobe' lets you request a consistency check for a particular block at
1875 any time (checks are normally done only when you call `free' or `realloc'
1878 * It is now possible to easily cross-compile the C library, building on one
1879 system a library to run on another machine and/or operating system. All
1880 you need to do is set the variable `HOST_CC' in `configparms' to the
1881 native compiler for programs to run on the machine you are building on (a
1882 few generator programs are used on Unix systems); set `CC' to the
1885 * The new function `fexecve' (only implemented on the GNU system) executes
1886 a program file given a file descriptor already open on the file.
1890 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1891 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1893 * You can set the variable `libprefix' in `configparms' to specify a prefix
1894 to be prepended to installed library files; this makes it easy to install
1895 the GNU C library to be linked as `-lgnuc' or whatever.
1897 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1898 copies a limited number of characters from a string, and returns the
1899 address of the last character written.
1901 * You no longer need to check for whether the installed `stddef.h' is
1902 compatible with the GNU C library. configure now checks for you.
1904 * You can now define a per-stream `fileno' function to convert the
1905 stream's cookie into an integral file descriptor.
1907 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1908 allocates zero bytes of storage, and returns a unique pointer which
1909 you can pass to `realloc' or `free'. The behavior is undefined if
1910 you dereference this pointer.
1912 * The C library now runs on Sony NEWS m68k machines running either
1913 NewsOS 3 or NewsOS 4.
1915 * The new `syscall' function is a system-dependent primitive function
1916 for invoking system calls. It has the canonical behavior on Unix
1917 systems, including unreliable return values for some calls (such as
1918 `pipe', `fork' and `getppid').
1920 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1921 to `EAGAIN', which is the preferred name. On systems whose kernels
1922 use two distinct codes, the C library now translates EWOULDBLOCK to
1923 EAGAIN in every system call function.
1927 * The GNU C Library Reference Manual is now distributed with the library.
1928 `make dvi' will produce a DVI file of the printed manual.
1929 `make info' will produce Info files that you can read on line using C-h i
1930 in Emacs or the `info' program.
1931 Please send comments on the manual to bug-glibc-manual@gnu.org.
1933 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1935 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1937 * Jason Merrill has contributed a port to the Sequent Symmetry running
1938 Dynix version 3 (i386-sequent-dynix).
1940 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1941 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1943 * New function `memory_warnings' lets you arrange to get warnings when
1944 malloc is running out of memory to allocate, like Emacs gives you.
1946 * The C library now contains the relocating allocator used in Emacs 19 for
1947 its editing buffers. This allocator (ralloc) minimizes allocation
1948 overhead and fragmentation by moving allocated regions around whenever it
1949 needs to. You always refer to a ralloc'd region with a "handle" (a
1950 pointer to a pointer--an object of type `void **').
1952 * There is a new `printf' format: `%m' gives you the string corresponding
1953 to the error code in `errno'.
1955 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1956 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1957 pass, the `a' modifier says to fill in a `char **' you pass with a
1960 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1961 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1962 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1964 * `mkstemp' is a traditional Unix function to atomically create and open a
1965 uniquely-named temporary file.
1969 * The standard location for the file that says what the local timezone is
1970 has changed again. It is now `/usr/local/etc/localtime' (or more
1971 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1973 * The distribution no longer contains any files with names longer than 14
1976 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1977 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1979 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1983 * The configuration process has changed quite a bit. The `configure'
1984 script is now used just like the configuration scripts for other GNU
1985 packages. The `sysdeps' directory hierarchy is much rearranged.
1986 The file `INSTALL' explains the new scheme in detail.
1988 * The header files no longer need to be processed into ANSI C and
1989 traditional C versions. There is just one set of files to install, and
1990 it will work with ANSI or old C compilers (including `gcc -traditional').
1992 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1993 MIPS DECStation running Ultrix 4.
1995 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1996 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1997 made itself into a shared library.
1999 * Yet further improved support for the i386, running 4.3 BSD-like systems
2000 (such as Mach 3 with the Unix single-server), or System V.
2002 * New function `strncasecmp' to do case-insensitive string comparison
2003 with limited length.
2005 * New function `strsep' is a reentrant alternative to `strtok'.
2007 * New functions `scandir' and `alphasort' for searching directories.
2009 * New function `setenv' is a better interface to `putenv'.
2011 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2012 function for traversing a directory tree.
2014 * The GNU obstack package is now also part of the C library.
2015 The new function `open_obstack_stream' creates a stdio stream that
2016 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2017 formatted output directly to an obstack.
2019 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2020 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2022 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2024 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2025 things to your strings.
2027 * There are some new test programs: test-fseek, testmb, and testrand.
2029 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2030 These ports are not finished, but are a good starting place for really
2031 supporting those systems.
2033 * `/etc/localtime' is now the standard location for the file that says what
2034 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2035 This follows the general principle that `/etc' is the place for all local
2036 configuration files.
2038 * The C library header files now use `extern "C"' when used by the C++
2039 compiler, so the C library should now work with C++ code.
2041 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2042 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2045 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2046 function which uses the `merge sort' algorithm, and is said to be
2047 significantly faster than the old GNU `qsort' function. Merge sort is
2048 now the standard `qsort' function. The new algorithm can require a lot
2049 of temporary storage; so, the old sorting function is called when the
2050 required storage is not available.
2052 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2053 provides the Unix `crypt' function, plus some other entry points.
2055 * The code and header files taken from 4.4 BSD have been updated with the
2056 latest files released from Berkeley.
2058 ----------------------------------------------------------------------
2059 Copyright information:
2061 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
2063 Permission is granted to anyone to make or distribute verbatim copies
2064 of this document as received, in any medium, provided that the
2065 copyright notice and this permission notice are preserved,
2066 thus giving the recipient permission to redistribute in turn.
2068 Permission is granted to distribute modified versions
2069 of this document, or of portions of it,
2070 under the above conditions, provided also that they
2071 carry prominent notices stating who last changed them.
2074 version-control: never