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, 411, 2541, 2547, 2548, 2551, 2552, 2553, 2554, 2562, 2563, 2565,
13 2566, 2576, 3335, 3976, 3992, 4026, 4108, 4596, 4822, 5077, 5461, 5805,
14 5993, 6471, 6884, 6907, 6911, 9739, 9902, 10110, 10135, 10140, 10210,
15 10545, 10716, 11174, 11322, 11365, 11494, 12047, 13058, 13525, 13526,
16 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551, 13552,
17 13553, 13555, 13559, 13566, 13583, 13618, 13637, 13656, 13658, 13673,
18 13695, 13704, 13706, 13726, 13738, 13786, 13792, 13806, 13840, 13841,
19 13844, 13846, 13851, 13852, 13854
23 + define static_assert
27 + declare at_quick_exit and quick_exit also for ISO C11
29 + aligned_alloc. NB: The code is deliberately allows the size parameter
30 to not be a multiple of the alignment. This is a moronic requirement
31 in the standard but it is only a requirement on the caller, not the
36 + uchar.h support added
38 + CMPLX, CMPLXF, CMPLXL added
40 Implemented by Ulrich Drepper.
42 * Support for the IA-64 is removed and could live in ports.
44 * Remove support for anything but ELF binary format
46 * Checking versions of poll, ppoll added.
47 Implemented by Ulrich Drepper.
49 * More generic and 64-bit performance optimizations to math functions.
50 Implemented by Ulrich Drepper.
54 * The following bugs are resolved with this release:
56 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
57 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
58 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
59 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
60 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
61 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
62 13484, 13506, 13515, 13523, 13524, 13538, 13540
64 * New program pldd to list loaded object of a process
65 Implemented by Ulrich Drepper.
67 * Add nss_db support back to glibc. No more dependency on Berkeley db
68 and support for initgroups lookups.
69 Implemented by Ulrich Drepper.
71 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
74 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
77 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
79 Contributed by Liubov Dmitrieva.
81 * Optimized strchr and strrchr for SSE on x86-32.
82 Contributed by Liubov Dmitrieva.
84 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
85 for x86-64 and x86-32.
86 Contributed by Liubov Dmitrieva.
88 * New interfaces: scandirat, scandirat64
89 Implemented by Ulrich Drepper.
91 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
92 Implemented by Ulrich Drepper.
94 * nscd now also caches the netgroup database.
95 Implemented by Ulrich Drepper.
97 * Integrate libm with gcc's -ffinite-math-only option.
98 Implemented by Ulrich Drepper.
100 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
101 to math functions. Implemented by Ulrich Drepper.
103 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
104 Implemented by Ulrich Drepper.
106 * New Linux interfaces: process_vm_readv, process_vm_writev
108 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
109 Implemented by Ulrich Drepper.
111 * Optimized nearbyint and strcasecmp for PPC.
112 Implemented by Adhemerval Zanella.
114 * New locales: bho_IN, unm_US, es_CU, ta_LK
118 * The following bugs are resolved with this release:
120 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
121 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
122 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
123 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
124 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
125 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
126 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
127 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
128 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
129 12795, 12811, 12813, 12814, 12841
131 * The RPC implementation in libc is obsoleted. Old programs keep working
132 but new programs cannot be linked with the routines in libc anymore.
133 Programs in need of RPC functionality must be linked against TI-RPC.
134 The TI-RPC implementation is IPv6 enabled and there are other benefits.
136 Visible changes of this change include (obviously) the inability to link
137 programs using RPC functions without referencing the TI-RPC library and the
138 removal of the RPC headers from the glibc headers.
139 Implemented by Ulrich Drepper.
141 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
142 syncfs, setns, sendmmsg
144 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
145 yue_HK, lij_IT, mhr_RU
147 * New encodings: CP770, CP771, CP772, CP773, CP774
149 * New program sotruss to trace calls through PLTs
150 Implemented by Ulrich Drepper.
152 * The malloc hook implementation is marked deprecated and will be removed
153 from the default implementation in the next version. The design never
154 worked ever since the introduction of threads. Even programs which do
155 not create threads themselves can use multiple threads created internally.
159 * The following bugs are resolved with this release:
161 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
162 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
163 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
164 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
167 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
169 * POWER7 optimizations: memset, memcmp, strncmp
171 * New optimized string functions for x86-64: strnlen (SSE2),
172 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
173 Implemented by Ulrich Drepper.
177 * The following bugs are resolved with this release:
179 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
180 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
181 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
182 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
183 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
184 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
185 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
186 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
188 * New interfaces: pthread_getname_np, pthread_setname_np
190 * New Linux interface: recvmmsg
192 * STT_GNU_IFUNC implemented for Sparc by David Miller.
194 * The dynamic linker now recognizes supported ABI versions from the
195 EI_ABIVERSION field in the ELF header.
196 Implemented by Ulrich Drepper.
198 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
199 will not be used to fill in password fields in the passwd.byname replies.
200 Instead it is used to synthesize the shadow.byname table, should it be
201 missing. This is a useful mode in some installations involving Solaris.
202 Implemented by Ulrich Drepper.
204 * New locales: kok_IN, sq_MK, cv_RU
208 * The following bugs are resolved with this release:
210 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
211 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
212 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
213 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
214 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
215 10789, 10817, 10823, 10840, 10847
217 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
219 Implemented by Ulrich Drepper.
221 * Checking version of longjmp added that fails if an uninitialized stack
222 frame would be created. Implemented by Ulrich Drepper.
224 * STT_GNU_IFUNC is now supported in static executables.
225 Implemented by H.J. Lu.
227 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
229 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
230 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
231 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
232 Contributed by H.J. Lu.
234 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
235 Implemented by Ulrich Drepper.
237 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
239 Contributed by H.J. Lu.
241 * Support for fma instruction in AVX on x86-64.
242 Implemented by H.J. Lu and Ulrich Drepper.
244 * AVX support in x86-64 auditing support in ld.so.
245 Implemented by H.J. Lu.
247 * STB_GNU_UNIQUE support added.
248 Implemented by Ulrich Drepper.
250 * Implement second fallback mode for optimized DNS lookup for even more
251 broken environments. If two requests from the same port are not
252 handled correctly close the socket and open a new one before sending
253 the second request. The 'single-request-reopen' option in /etc/resolv.conf
254 can be used to select this mode right away, instead of rediscovering the
255 necessity is every process again.
256 Implemented by Ulrich Drepper.
258 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
259 Implemented by Adam Tkac.
261 * Optimized iconv conversions for S390x.
262 Implemented by Andreas Krebbel.
264 * Using condvars with PI mutexes is now more efficient due to kernel
265 support for requeueing to PI futexes. NPTL support added for x86-64.
266 Implemented by Ulrich Drepper.
268 * New locales: ps_AF, my_MM
272 * The following bugs are resolved with this release:
274 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
275 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
276 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
277 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
278 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
280 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
281 Implemented by Ulrich Drepper.
283 * New Linux interfaces: accept4, fallocate, fallocate64.
284 Implemented by Ulrich Drepper.
286 * Correct declarations of string function when used in C++ code. This
287 could lead to compile errors for invalid C++ code.
289 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
292 * New POSIX 2008 interface: psiginfo
293 Implemented by Ulrich Drepper.
295 * New ISO C++1x interfaces: quick_exit, at_quick_exit
296 Implemented by Ulrich Drepper.
298 * Support for selecting between multiple function definitions at runtime
299 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
301 * The libcrypt library can now use the hash function implementations in
302 NSS. Implemented by Ulrich Drepper.
304 * The malloc implementation can be compiled to be less memory efficient
305 but higher performing in multi-threaded programs.
306 Implemented by Ulrich Drepper.
308 * New locales: nan_TW@latin, ks_IN
310 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
311 Implemented by Ulrich Drepper.
313 * Extended printf hook support. It is possible to use user-defined types
314 and extend existing format specifiers.
315 Implemented by Ulrich Drepper.
317 * Handling for group shadow files has been added.
318 Implemented by Ulrich Drepper.
320 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
321 servers (the case, e.g., for some people using the built-in DNS
322 server in ADSL modems/routers). There is a once-per-process timeout
323 in case of a broken server. To avoid it, users can run nscd or put
324 'options single-request' in /etc/resolv.conf.
325 Implemented by Ulrich Drepper.
329 * The following bugs are resolved with this release:
331 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
332 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
333 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
334 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
335 6968, 6974, 6980, 6995, 7008, 7009, 7029
337 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
338 up at the same time. Implemented by Ulrich Drepper.
340 * TLS descriptors for LD and GD on x86 and x86-64.
341 Implemented by Alexandre Oliva.
343 * getaddrinfo now handles DCCP and UDPlite.
344 Implemented by Ulrich Drepper.
346 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
347 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
348 Implemented by Ulrich Drepper.
350 * New implementation of memmem, strstr, and strcasestr which is O(n).
351 Implemented by Eric Blake.
353 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
355 * Implement "e" option for popen to open file descriptor with the
356 close-on-exec flag set. Implemented by Ulrich Drepper.
358 * Implement "b" mode for fmemopen. In this mode writes writes don't
359 implicitly add a NUL byte and seeks from the end of the buffer really
360 use the buffer end, not the string length as the basis.
361 Implemented by Ulrich Drepper.
363 * Many functions, exported and internal, now atomically set the close-on-exec
364 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
366 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
368 Implemented by Pravin Satpute.
370 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
374 * The following bugs are resolved with this release:
376 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
377 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
378 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
379 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
380 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
381 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
382 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
384 * New locales: bo_CN, bo_IN, shs_CA.
386 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
388 * Sorting rules for some Indian languages (Devanagari and Gujarati).
389 Implemented by Pravin Satpute.
391 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
393 * nscd caches now all timeouts for DNS entries
394 Implemented by Ulrich Drepper.
396 * nscd is more efficient and wakes up less often.
397 Implemented by Ulrich Drepper.
399 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
400 vdprintf, and obstack_vprintf.
401 Implemented by Jakub Jelinek.
403 * Faster memset for x86-64.
404 Implemented by Harsha Jagasia and H.J. Lu.
406 * Faster memcpy on x86.
407 Implemented by Ulrich Drepper.
409 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
410 Implemented by Ulrich Drepper.
412 * Faster sqrt and sqrtf implemention for some PPC variants.
413 Implemented by Stephen Munroe.
417 * The following bugs are resolved with this release:
419 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
420 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
421 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
422 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
423 5071, 5103, 5104, 5112, 5113, 5184, 5186
425 * More checking functions: fread, fread_unlocked, open*, mq_open.
426 Implemented by Jakub Jelinek and Ulrich Drepper.
428 * Extend fortification to C++. Implemented by Jakub Jelinek.
430 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
431 by not recognizing 'a' as a modifier when those specs are requested.
432 Implemented by Jakub Jelinek.
434 * PPC optimizations to math and string functions.
435 Implemented by Steven Munroe.
437 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
438 options to be passed. Implemented by Ulrich Drepper.
440 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
442 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
443 Implemented by Ulrich Drepper.
445 * Handle private futexes in the NPTL implementation.
446 Implemented by Jakub Jelinek and Ulrich Drepper.
448 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
449 Implemented by Roland McGrath and Ulrich Drepper.
451 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
453 * SHA-256 and SHA-512 based password encryption.
454 Implemented by Ulrich Drepper.
456 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
457 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
460 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
461 Implemented by Ulrich Drepper.
465 * The following bugs are resolved with this release:
467 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
468 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
469 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
470 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
471 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
472 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
473 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
476 * New Linux interfaces: epoll_pwait, sched_getcpu.
478 * New generic interfaces: strerror_l.
480 * nscd can now cache the services database. Implemented by Ulrich Drepper.
484 * The following bugs are resolved with this release:
486 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
487 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
488 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
489 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
490 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
491 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
492 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
493 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
494 3225, 3251, 3252, 3253, 3273
496 * For Linux, the sorting of addresses returned by getaddrinfo now also
497 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
498 Implemented by Ulrich Drepper.
500 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
501 Implemented by Ulrich Drepper.
503 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
505 * New iconv module for MIK. Contributed by Alexander Shopov.
507 * For sites with broken group and/or passwd database, the auto-propagate
508 option of nscd can prevent creating ID lookup entries from the results
509 of a name lookup and vice versa. This usually is no problem but some
510 site might have problems with the default behavior.
511 Implemented by Ulrich Drepper.
513 * Iterating over entire database in NIS can be slow. With the
514 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
515 to trade time for memory. The entire database will be read at once.
516 Implemented by Ulrich Drepper.
518 * The interfaces introduced in RFC 3542 have been implemented by
521 * Support for the new ELF hash table format was added by Ulrich Drepper.
523 * Support for priority inheritance mutexes added by Jakub Jelinek and
526 * Support for priority protected mutexes added by Jakub Jelinek.
528 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
529 or_IN, csb_PL, fy_NL, sr_ME.
533 * More overflow detection functions.
535 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
536 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
538 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
539 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
540 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
541 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
542 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
543 by Masahide Washizawa.
545 * It is now possible to install audit libraries for the dynamic linker using
546 LD_AUDIT. Implemented by Ulrich Drepper.
548 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
549 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
550 For a libc and libpthread that works well on Linux 2.4 kernels, we
551 recommend using the stable 2.3 branch.
553 * The new function open_wmemstream acts like open_memstream,
554 but uses a wchar_t wide character buffer.
556 * The new function ppoll is an improved version of poll, similar to pselect.
558 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
559 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
560 renameat, unlinkat, linkat, symlinkat, readlinkat.
562 * New Linux kernel system calls: unshare,
563 inotify_init, inotify_add_watch, inotify_rm_watch.
565 * The euidaccess function is now also known by the alias eaccess,
566 for compatibility with some other systems.
568 * Timezone data updated to 2006b version.
572 * The following bugs are resolved with this release:
574 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
575 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
576 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
577 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
578 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
579 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
581 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
583 * As of this release, GCC 4 can be used to compile the C Library.
585 * Timezone data updated to 2005m version.
589 * The following bugs are resolved with this release:
591 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
592 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
593 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
594 777, 787, 821, 822, 823, 825
596 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
600 * Support for RFC 3678. Real implementations exist only for Linux so far.
601 Implemented by Ulrich Drepper.
603 * nscd can now cache entries persistently. Expiring entries are reloaded.
604 For speedups the cache can be shared in memory with client processes.
605 Implemented by Ulrich Drepper.
607 * nscd can now perform SELinux checks.
608 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
610 * getaddrinfo queries are now cached. Canonical name lookup is performed
612 Implemented by Ulrich Drepper.
614 * The nothrow function attribute is used when headers are used by gcc when
615 compiling C code. This can avoid significant amounts of exception
618 * The malloc functions perform more error checking and are stricter when
619 it comes to reacting on errors. The default action is to terminate
620 the process after showing an error message. Implemented by Ulrich Drepper.
622 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
623 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
625 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
626 namespaces using the new function dlmopen(). This feature is of course,
627 like most other dynamic loading functionality, not available in statically
628 linked applications. Implemented by Ulrich Drepper.
630 * Low-overhead boundary checking variants of string and some stdio functions
631 were added. These are to be used in conjunction with a gcc patch by
632 Jakub Jelinek which adds calls to these functions if possible.
633 Implemented by Jakub Jelinek and Ulrich Drepper.
635 * Old code for several operating systems and machine architectures that
636 have not been in working condition in a long time have been removed from
637 the main source tree maintained by the GNU C Library's maintainers.
638 These files are now reside in the separate `ports' source module
639 that is usable as an add-on when building the library.
643 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
644 interrogate the dynamic linker, compatible with the Solaris interface.
646 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
647 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
649 * getifaddrs now uses the netlink interface on Linux to get its information.
650 Implemented by Thorsten Kukuk.
652 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
653 Implemented by Ulrich Drepper.
655 * support for non-executable stacks on x86 has been added. Changes mostly
658 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
661 * getaddrinfo now performs destination address selection according to
666 * Thread-safe interfaces for many functions that access locale data
667 were added in version 2.3, but these features were omitted from NEWS.
668 Many functions have variants with an `_l' suffix that take a `locale_t'
669 object as a parameter rather than consulting the current locale.
670 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
671 create and maintain `locale_t' objects. Additionally, the new function
672 `uselocale' sets "the current locale" (as used by functions not so
673 parameterized) set for an individual thread. These features were added
674 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
676 * The functions getresuid, getresgid, setresuid, and setresgid, which
677 have long been available on Linux, are now declared in <unistd.h>
678 and are now also available on the Hurd.
680 * ELF thread-local storage support (TLS) now works on x86-64.
682 * The new dynamic string token $LIB is expanded in shared library names.
683 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
685 * Aldy Hernandez contributed complete software floating point support for
686 PowerPC machines with no FPU.
688 * fexecve is implemented on Linux.
690 * The `btowc' function should work at least twice as fast due to
691 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
693 * With approriate thread add-ons cancelable functions are now implemented
694 in libc.so as well. No need to call the function in libpthread. This
695 change allowed to finally disable the incorrect and expensive handling
696 of weak definition in ld.so.
698 * Yet more PLT entries in libc.so have been removed. We finally arrived
699 at the bare minimum. Startup times improved appropriately.
701 * Support for the new Linux/x86 system call interface was added. The
702 AT_SYSINFO auxiliary vector entry is recognized and handled.
706 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
709 * iconv (the program and the interface) now accepts empty names (excluding
710 options like //TRANSLIT) to mean "use charset of current locale".
712 * localedef can now transliterate characters in strings which are not in
713 the provided charmap. The information from the input locale is used.
715 * Prelinking support was added for ELF targets. This requires additional
716 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
718 * Read-only stdio streams now use mmap to speed up operation by eliminating
719 copying and buffer underflows. To use add 'm' to the mode string of
720 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
722 * The malloc functions were completely rewritten by Wolfram Gloger based
723 on Doug Lea's malloc-2.7.0.c.
725 * Isamu Hasegawa contributed a completely new and POSIX-conformant
726 implementation of regex.
728 * Bruno Haible upgraded the iconv and locale implementation to support
731 * Contents of the LC_* and LANG environment variables in the CEN style are
732 not recognized anymore. It never was used. Change by Ulrich Drepper.
734 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
735 thread-local storage (TLS) ABI on some platforms.
736 Changes by Ulrich Drepper. SH support by Kaz Kojima.
738 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
739 EUC-JISX0213, and TSCII.
741 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
742 BSD-compatible interface for getting all network interface addresses.
743 Implementation for IPv4 by Roland McGrath.
745 * Loading of locale data is faster due to the introduction of a locale
746 archive. Implemented by Roland McGrath and Ulrich Drepper.
748 * Startup times are significantly reduced by not using exported functions
749 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
752 * Steven Munroe contributed a port to PowerPC64/Linux.
756 * The Hurd now uses the GNU libio implementation of stdio rather than the
757 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
759 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
760 with the same behavior as the Linux system call of the same name.
764 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
765 128-bit long double format.
767 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
768 IBM1161, and IBM1162 charsets.
770 * Andreas Jaeger contributed a port to x86-64/Linux.
772 * Peter Bruin contributed a port to PowerPC/Hurd.
774 * libc functions using I/O streams now can handle wide-oriented streams
777 * optimizations in the dynamic linker. Binaries created by recent binutils
778 versions start up quicker due to reduced time spent on relocations.
780 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
784 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
785 asinh, atanh, j0 for the 128-bit long double format.
787 * Bruno Haible updated all the code handling Unicode in some form to
790 * Speed of regex for single-byte locales is back to previous levels.
791 Patch by Isamu Hasegawa.
793 * Alpha, SPARC, and IA-64 now also using floating stacks.
795 * Startup time of internationalized applications greatly improved through
796 iconv cache. Use iconvconfig to generate the cache file.
797 Contributed by Ulrich Drepper.
799 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
800 severe performance problems. Patch by David Mosberger.
802 * The Hurd port got a lot more functionality like AIO, various stdio
803 extensions, etc. Mainly done by Roland McGrath.
805 * mtrace can now lookup symbols in shared libraries.
809 * Intel's IA-64 math library is largely integrated. It provides fast and
810 accurate implementatations for most basic and standard math functions
811 in float, double, and long double format.
813 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
814 and asin for the 96-bit long double format and asin, log, tan for the
815 128-bit long double format.
817 * The beginning of a last-bit accurate math library by IBM Haifa were added.
818 The basic double functions exist today. Contributed by Abraham Ziv
819 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
820 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
822 * An asynchronous name lookup library was added. The interface is designed
823 after POSIX AIO. The proposal was circulated beforehand to get comments.
824 No negative ones came in. Implemented by Ulrich Drepper.
826 * Port to S390/64bit contributed by Martin Schwidefsky
827 <schwidefsky@de.ibm.com>.
829 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
830 of functions for Linux/IA-64.
832 * The RPC code is now thread safe. Threads can now use the same service
833 of different services at the same time. Patch by Eric Norum
834 <eric.norum@usask.ca> with some help by Ulrich Drepper.
836 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
837 family of functions for Linux/S390.
839 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
840 of functions for Linux/x86.
842 * Port to Linux/CRIS contributed by Axis Communications.
846 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
847 we can now check for namespace violations and missing declarations. The
848 result is that almost all headers are now Unix-compliant (as defined in
849 the upcoming XPG6). The negative side is that some programs might need
850 corrections, too, if they depend on the incorrect form of the headers in
851 previous versions which defined too many symbols and included too many
854 * regex now handles multibyte character sets correctly.
855 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
857 * iconv (the program) does now conform to the upcoming XPG6 and handles
858 charmaps. Instead of the charset names the path of charmaps can be
859 provided and the conversion happens based on this data.
860 Contributed by Ulrich Drepper.
862 * The locale program now provides detailed information about the installed
867 only lists the names of the supported locales
871 provides details such as country, language, and codeset name.
872 Contributed by Ulrich Drepper.
876 * The gencat program now parses the input file according to the charset
877 selected by the LC_CTYPE category. This is important for stateful
878 character sets. To make generating catalogs easier there is a way
879 to overwrite the charset selected by the locale: before the first
880 message or $ quote line the catalog can contain a line like
884 to select the charset (ISO-8859-2 in this case).
886 Implemented by Shinya Hanataka and Ulrich Drepper.
888 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
889 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
890 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
892 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
893 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
895 * The LANGUAGE environment variable is now ignored unless the locale is
896 changed from the default "C" locale.
898 * The usual bug fixes.
902 * Greg McGary added runtime support for bounds checking using gcc's
903 new -fbounded-pointers option. ix86 target is complete. PowerPC
906 * Thorsten Kukuk added secure mode support to nscd.
908 * The Berkeley db libraries have been removed.
910 Related, the nss_db module is now in a separate package since it
911 obviously requires a database library being available.
913 * Wide character I/O streams implemented by Ulrich Drepper.
915 * Functions from the extended socket API added by Ulrich Drepper.
917 * Functions feenableexcept and fedisableexcept to control the
918 behaviour of individual exceptions have been added by Andreas Jaeger.
920 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
922 * The resolver code has been updated from bind 8.2.3-T5B which supports
923 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
926 This change could in some situations effect backward compatibility. Since
927 now `_res' is a thread-local instead of a global variable, modifying it
928 in one thread does not have any effect in other threads.
930 The resolver library was also extended to allow IPv6 as the transport
931 protocol for the requests. This work was done by Stig Venaas.
933 * Compatibility code for K&R C compilers has been removed from the
934 header files. A ISO C compiler is needed to use the library
935 (conforming to either C89 or C99 standard).
937 * Complete rewrite of the localedef program to support multibyte character
938 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
939 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
940 Implemented by Ulrich Drepper.
942 Bruno Haible significantly improved the generation and use of the data
943 structures for the wide character tables.
945 * Plural handling in gettext implemented by Ulrich Drepper.
947 * The utmp daemon has been removed.
949 * The port to MIPS-Linux has been finished by Andreas Jaeger.
951 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
954 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
956 * POSIX barriers implemented by Kaz Kylheku.
958 * POSIX spawn function family implemented by Ulrich Drepper.
960 * POSIX spinlocks are now available.
962 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
964 * the configure option --enable-kernel=X.Y.Z allows to strip out
965 compatibility for kernel versions before X.Y.Z. This is currently only
966 implemented for Linux.
968 * the sockaddr_in6 structure changed. The IPv6 working group added a new
969 field sin6_scope_id. This means that all programs using IPv6 should be
970 recompiled. Don't expect binary compatibility with previous glibc
973 * various conversion modules for IBM character sets contributed by
976 * IA-64 port by Jes Sorensen and HJ Lu.
978 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
979 Compiling the GNU C Library for Linux/ia64
980 ******************************************
982 Please refer to the file INSTALL in the same directory as you found
983 this file for general information about configuring and compiling
986 For general inquiries about glibc under Linux/ia64 please use the
987 following mailing list linux-ia64@linuxia64.org or one of the relevant
990 Recommended Tools for Compilation
991 =================================
993 In order for glibc-2.2 to build correctly on the ia64 you need at
994 least the following versions of the GNU tools (the :
996 * The Cygnus toolchain snapshot for the ia64 as of August 4
997 including the provided set of patches. It is however recommend
998 you use the October 24 toolchain snapshot or a more recent version.
1000 OR alternatively you can try the following (the Cygnus toolchain is
1001 the recommended solution):
1003 * GCC and binutils, GAS and GNU LD out of CVS from
1004 sources.redhat.com as of August 28, 2000 or later. The CVS tree
1005 may require special patches to work properly on the ia64.
1007 Configuring and compiling GNU Libc for Linux/ia64
1008 =================================================
1010 The library requires Linux kernel version 2.4.0-test4-000728 or
1011 later to funtion properly. Besides that it support for debug libraries
1012 is currently untested. Hence the following options
1013 are required for configuring the library:
1015 --disable-debug --enable-kernel=2.4.0
1017 It is also important that you make sure the library picks up the
1018 appropriate kernel header files, if you do not have recent enough
1019 kernel headers in /usr/src/linux/include, you should use the
1020 --with-headers=<path> option to specify the location.
1022 As an example I personally use the following options to configure
1027 --enable-kernel=2.4.0
1029 --enable-add-ons=yes
1031 --with-headers=/home/jes/linux/include
1036 Jes Sorensen <jes@linuxcare.com>,
1038 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1052 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1054 * New xdr functions are added; some rpc functions are now 64bit clean.
1056 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1058 * Fixed known incompatibilities with glibc 2.0.
1060 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1062 * Optimized a number of functions (especially the ELF dynamic loader).
1064 * Update timezone data files.
1066 * lots of charmaps corrections
1068 * some new locale definitions and charmaps
1073 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1074 conform to POSIX member type requirements. Symbol versions have been
1075 adjusted as needed within the library, and for direct use by applications,
1076 but there is potential for problems if third-party libraries use
1077 struct timeval as part of their interface. This does not present
1078 a problem for X and other "essential" system libraries.
1080 * An additional locale model to support C++ Standard Library locale
1081 model and probably more was implemented by Ulrich Drepper.
1083 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1086 * Miles Bader provided the `argp' function family to support hierachical
1087 command line argument parsing, layered on top of getopt.
1089 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1091 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1094 * scanf recognizes the %a and %A format for scanning floating point numbers.
1096 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1097 information and interfaces for the available integer types.
1099 * about 130 new math functions were added to implement the ISO C9x math
1102 * the new header <complex.h> contains definitions of the complex math
1103 functions from ISO C 9X.
1105 * the new header <tgmath.h> defines generic macros to use complex or
1106 real valued functions.
1108 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1110 * Andreas Jaeger provided a test suite for the math library.
1112 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1114 * Ulrich Drepper added character set conversion functions (iconv).
1116 * Optimized string functions have been added.
1118 * The localedata addon is now part of glibc.
1120 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1122 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1123 daemon for NSS (nscd).
1125 Missing a better place here are some numbers on improvements. Under
1126 Linux 2.1.125 un-tar-ing the kernel sources takes
1130 using local files 12.19s 6.88s 22.91s
1132 using NIS 13.92s 8.91s 26.34s
1134 using NIS & nscd 10.37s 7.34s 25.30s
1136 using NIS+ 27.57s 30.37s 640.46s
1138 using NIS+ & nscd 10.25s 7.83s 26.51s
1140 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1142 Keep in mind that non-namelookup related operations dominate above times.
1143 It was just a common complain that using NIS+ unpacking the kernel is
1146 [1] The old nscd implementation is not available anymore since it was
1147 distributed with glibc up to version 2.0.98 and thus is now replaced.
1149 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1151 * Mark Kettenis provided a Hesiod NSS module.
1153 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1154 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1156 * rcmd can now handle netgroups (Dick Streefland).
1158 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1161 * Support for the IPv6 protocol has been added to the socket API, as per the
1162 latest draft standards.
1164 * Support for Linux 2.2 has been added.
1166 * Interface changes relative to the latest 2.0.x release:
1167 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1168 addseverity NEW: Unix98
1169 alphasort64 NEW: LFS
1170 argp_err_exit_status NEW: argp, GNU ext
1171 argp_error NEW: argp, GNU ext
1172 argp_failure NEW: argp, GNU ext
1173 argp_help NEW: argp, GNU ext
1174 argp_parse NEW: argp, GNU ext
1175 argp_program_bug_address NEW: argp, GNU ext
1176 argp_program_version NEW: argp, GNU ext
1177 argp_program_version_hook NEW: argp, GNU ext
1178 argp_state_help NEW: argp, GNU ext
1179 argp_usage NEW: argp, GNU ext
1180 authdes_create NEW: Secure RPC
1181 authdes_getucred NEW: Secure RPC
1182 authdes_pk_create NEW: Secure RPC
1183 backtrace NEW: GNU ext.
1184 backtrace_symbols NEW: GNU ext.
1185 backtrace_symbols_fd NEW: GNU ext.
1187 cacosf NEW: ISO C 9x
1188 cacosh NEW: ISO C 9x
1189 cacoshf NEW: ISO C 9x
1190 cacoshl NEW: ISO C 9x
1191 cacosl NEW: ISO C 9x
1198 casinf NEW: ISO C 9x
1199 casinh NEW: ISO C 9x
1200 casinhf NEW: ISO C 9x
1201 casinhl NEW: ISO C 9x
1202 casinl NEW: ISO C 9x
1204 catanf NEW: ISO C 9x
1205 catanh NEW: ISO C 9x
1206 catanhf NEW: ISO C 9x
1207 catanhl NEW: ISO C 9x
1208 catanl NEW: ISO C 9x
1209 cbc_crypt NEW: Secure RPC
1213 ccoshf NEW: ISO C 9x
1214 ccoshl NEW: ISO C 9x
1220 cimagf NEW: ISO C 9x
1221 cimagl NEW: ISO C 9x
1222 clearerr_locked REMOVED
1223 clntunix_create NEW: sunrpc ext
1225 clog10 NEW: ISO C 9x
1226 clog10f NEW: ISO C 9x
1227 clog10l NEW: ISO C 9x
1237 cprojf NEW: ISO C 9x
1238 cprojl NEW: ISO C 9x
1240 crealf NEW: ISO C 9x
1241 creall NEW: ISO C 9x
1246 csinhf NEW: ISO C 9x
1247 csinhl NEW: ISO C 9x
1250 csqrtf NEW: ISO C 9x
1251 csqrtl NEW: ISO C 9x
1255 ctanhf NEW: ISO C 9x
1256 ctanhl NEW: ISO C 9x
1258 des_setparity NEW: Secure RPC
1259 ecb_crypt NEW: Secure RPC
1260 endutxent NEW: Unix98
1262 exp10f NEW: ISO C 9x
1263 exp10l NEW: ISO C 9x
1267 fattach NEW: STREAMS
1268 fdetach NEW: STREAMS
1272 feclearexcept NEW: ISO C 9x
1273 fegetenv NEW: ISO C 9x
1274 fegetexceptflag NEW: ISO C 9x
1275 fegetround NEW: ISO C 9x
1276 feholdexcept NEW: ISO C 9x
1278 feraiseexcept NEW: ISO C 9x
1279 ferror_locked REMOVED
1280 fesetenv NEW: ISO C 9x
1281 fesetexceptflag NEW: ISO C 9x
1282 fesetround NEW: ISO C 9x
1283 fetestexcept NEW: ISO C 9x
1284 feupdateenv NEW: ISO C 9x
1285 fflush_locked REMOVED
1289 fgets_unlocked NEW: GNU ext.
1290 fileno_locked REMOVED
1302 fputc_locked REMOVED
1303 fputs_unlocked NEW: GNU ext.
1304 fread_unlocked NEW: GNU ext.
1309 fstatvfs NEW: Unix98
1313 ftruncate64 NEW: LFS
1315 fwrite_unlocked NEW: GNU ext.
1316 gai_strerror NEW: IPv6
1320 getchar_locked REMOVED
1322 getdate_err NEW: Unix98
1323 getdate_r NEW: GNU ext.
1325 getnameinfo NEW: IPv6
1326 getnetname NEW: Secure RPC
1327 getpmsg NEW: STREAMS
1328 getpt NEW: Unix98 PTY
1329 getrlimit64 NEW: LFS
1330 getutxent NEW: Unix98
1331 getutxid NEW: Unix98
1332 getutxline NEW: Unix98
1333 glob64 NEW: GNU ext.
1334 globfree64 NEW: GNU ext.
1335 gnu_get_libc_release NEW: GNU ext.
1336 gnu_get_libc_version NEW: GNU ext.
1337 grantpt NEW: Unix98 PTY
1338 host2netname NEW: Secure RPC
1340 iconv_close NEW: iconv
1341 iconv_open NEW: iconv
1342 if_freenameindex NEW: IPv6
1343 if_indextoname NEW: IPv6
1344 if_nameindex NEW: IPv6
1345 if_nametoindex NEW: IPv6
1346 in6addr_any NEW: IPv6
1347 in6addr_loopback NEW: IPv6
1348 inet6_isipv4mapped NEW: IPv6
1349 isastream NEW: STREAMS
1350 iswblank NEW: GNU ext.
1351 key_decryptsession NEW: Secure RPC
1352 key_decryptsession_pk NEW: Secure RPC
1353 key_encryptsession NEW: Secure RPC
1354 key_encryptsession_pk NEW: Secure RPC
1355 key_gendes NEW: Secure RPC
1356 key_get_conv NEW: Secure RPC
1357 key_secretkey_is_set NEW: Secure RPC
1358 key_setnet NEW: Secure RPC
1359 key_setsecret NEW: Secure RPC
1360 llrint NEW: ISO C 9x
1361 llrintf NEW: ISO C 9x
1362 llrintl NEW: ISO C 9x
1363 llround NEW: ISO C 9x
1364 llroundf NEW: ISO C 9x
1365 llroundl NEW: ISO C 9x
1370 lrintf NEW: ISO C 9x
1371 lrintl NEW: ISO C 9x
1372 lround NEW: ISO C 9x
1373 lroundf NEW: ISO C 9x
1374 lroundl NEW: ISO C 9x
1376 makecontext NEW: Unix98
1377 mempcpy NEW: GNU ext.
1380 modify_ldt NEW: kernel
1384 nearbyint NEW: ISO C 9x
1385 nearbyintf NEW: ISO C 9x
1386 nearbyintl NEW: ISO C 9x
1387 netname2host NEW: Secure RPC
1388 netname2user NEW: Secure RPC
1389 nexttoward NEW: ISO C 9x
1390 nexttowardf NEW: ISO C 9x
1391 nexttowardl NEW: ISO C 9x
1395 passwd2des NEW: Secure RPC
1397 pow10f NEW: GNU ext.
1398 pow10l NEW: GNU ext.
1401 printf_size NEW: GNU ext.
1402 printf_size_info NEW: GNU ext.
1403 profil_counter REMOVED
1404 pthread_mutexattr_getkind_np REPLACED
1405 pthread_mutexattr_setkind_np REPLACED
1406 ptsname NEW: Unix98 PTY
1407 ptsname_r NEW: Unix98 PTY
1409 putchar_locked REMOVED
1410 putgrent NEW: GNU ext.
1412 putpmsg NEW: STREAMS
1413 pututxline NEW: Unix98
1417 readdir64_r NEW: LFS
1418 remquo NEW: ISO C 9x
1419 remquof NEW: ISO C 9x
1420 remquol NEW: ISO C 9x
1422 roundf NEW: ISO C 9x
1423 roundl NEW: ISO C 9x
1425 scalbln NEW: ISO C 9x
1426 scalblnf NEW: ISO C 9x
1427 scalblnl NEW: ISO C 9x
1429 sendfile NEW: kernel
1430 setcontext NEW: Unix98
1431 setrlimit64 NEW: LFS
1432 setutxent NEW: Unix98
1434 sigignore NEW: Unix98
1435 sigqueue NEW: POSIX.1b
1436 sigrelse NEW: Unix98
1437 sigset NEW: POSIX.1b
1438 sigtimedwait NEW: POSIX.1b
1439 sigwaitinfo NEW: POSIX.1b
1440 sincos NEW: GNU ext.
1441 sincosf NEW: GNU ext.
1442 sincosl NEW: GNU ext.
1446 strcasestr NEW: GNU ext.
1447 strtoimax NEW: ISO C 9x
1448 strtoumax NEW: ISO C 9x
1449 strverscmp NEW: GNU ext.
1450 svcauthdes_stats NEW: Secure RPC
1451 svcunix_create NEW: sunrpc etx
1452 svcunixfd_create NEW: sunrpc ext
1453 swapcontext NEW: Unix98
1454 tcgetsid NEW: Unix98 PTY
1455 tdestroy NEW: GNU ext.
1456 tgamma NEW: ISO C 9x
1457 tgammaf NEW: ISO C 9x
1458 tgammal NEW: ISO C 9x
1462 truncf NEW: ISO C 9x
1463 truncl NEW: ISO C 9x
1465 unlockpt NEW: Unix98 PTY
1466 updwtmpx NEW: Unix98
1467 user2netname NEW: Secure RPC
1468 utmpxname NEW: Unix98
1469 versionsort NEW: GNU ext.
1470 versionsort64 NEW: GNU ext.
1472 wcscasecmp NEW: GNU ext.
1473 wcsncasecmp NEW: GNU ext.
1474 wcsnlen NEW: GNU ext.
1475 wcstoimax NEW: ISO C 9x
1476 wcstoll NEW: ISO C 9x
1477 wcstoull NEW: ISO C 9x
1478 wcstoumax NEW: ISO C 9x
1480 wordexp NEW: POSIX.2
1481 wordfree NEW: POSIX.2
1482 write_profiling REMOVED
1483 xdecrypt NEW: Secure RPC
1484 xdr_authdes_cred NEW: Secure RPC
1485 xdr_authdes_verf NEW: Secure RPC
1486 xdr_cryptkeyarg NEW: Secure RPC
1487 xdr_cryptkeyarg2 NEW: Secure RPC
1488 xdr_cryptkeyres NEW: Secure RPC
1489 xdr_getcredres NEW: Secure RPC
1490 xdr_key_netstarg NEW: Secure RPC
1491 xdr_key_netstres NEW: Secure RPC
1492 xdr_keybuf NEW: Secure RPC
1493 xdr_keystatus NEW: Secure RPC
1494 xdr_netnamestr NEW: Secure RPC
1495 xdr_sizeof NEW: Secure RPC
1496 xdr_unixcred NEW: sunrpc ext
1497 xencrypt NEW: Secure RPC
1498 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1509 * inet_ntoa is thread-safe
1511 * updwtmp is moved from libutil to libc
1513 * rewrite of cbrt function
1515 * update of timezone data
1529 * add atoll function
1531 * fix complex problems in Berkeley DB code
1533 * fix math functions
1537 * fixed lots of header problems (especially Linux/GNU specific)
1539 * dynamic loader preserves all registers
1541 * Roland McGrath provided support for handling of auxiliary objects in
1542 the ELF dynamic loader.
1544 * support for parallel builds is improved
1548 * GNU extensions are no longer declared by default. To enable them you
1549 must define the macro `_GNU_SOURCE' in your program or compile with
1552 * The library has changed from using GNU ld symbol aliases to using weak
1553 symbols where available. The ELF object file format supports weak
1554 symbols; GNU ld also supports weak symbols in the a.out format. (There
1555 is also now support for other GNU ld extensions in ELF. Use the
1556 `--with-elf' option to configure to indicate you have ELF, and
1557 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1558 of many files which contained only symbol aliases, reducing the size of
1559 the source and the compiled library; many other files were renamed to
1560 less cryptic names previously occupied by the symbol alias files.
1561 There is a new header file <elf.h> for programs which operate on
1562 files in the ELF format.
1564 * Converted to Autoconf version 2, so `configure' has more options.
1565 Run `configure --help' to see the details.
1567 * The library can now be configured to build profiling, highly-optimized
1568 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1569 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1570 `configure' enable building these extra libraries. The shared library is
1571 built by default when using both ELF and GNU ld. When shared libraries
1572 are enabled, the new library `-ldl' is available for arbitrary run-time
1573 loading of shared objects; its interface is defined in <dlfcn.h>. The
1574 new header file <link.h> gives access to the internals of the run-time
1575 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1576 application of same name on other systems and it provides information
1577 about dynamically linked binaries.
1579 * The C library now provides the run-time support code for profiling
1580 executables compiled with `-pg'. Programs can control the profiling code
1581 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1582 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1583 the support for this file format was contributed by David Mosberger-Tang.
1585 * The math code has been replaced with a math library based on fdlibm from
1586 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1587 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1588 functions. The math functions now reside in a separate library, so
1589 programs using them will need to use `-lm' their linking commands.
1591 * John C. Bowman contributed optimized ix87 assembler inline functions.
1593 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1594 mechanism similar to that found in Solaris 2. This is now used for the
1595 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1596 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1597 file controls what services are used for each individual database. This
1598 works by loading shared libraries with names specified in `nsswitch.conf',
1599 so service modules can be changed or added at any time without even
1600 relinking any program. Currently there are the file, db, and NIS based
1601 NSS services available.
1603 * The new functions `strtoq' and `strtouq' parse integer values from
1604 strings, like `strtol' and `strtoul', but they return `long long int' and
1605 `unsigned long long int' values, respectively (64-bit quantities).
1607 * The new functions `strtof' and `strtold' parse floating-point values from
1608 strings, like `strtod', but they return `float' and `long double' values,
1609 respectively (on some machines `double' and `long double' are the same).
1611 * Ulrich Drepper has contributed new implementations of the floating-point
1612 printing and reading code used in the `printf' family of functions and
1613 `strtod', `strtof', and `strtold'. These new functions are perfectly
1614 accurate, and much faster than the old ones.
1616 * The implementation of the POSIX locale model was completely rewritten by
1617 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1618 to compile the POSIX locale definition.
1620 * The former dummy implementations of the strcoll and strxfrm function are
1621 now replaced by fully functional code contributed by Ulrich Drepper. The
1622 collation information comes from the POSIX locale definitions.
1624 * The new header <langinfo.h> defines an interface for accessing
1625 various locale-dependent data (using the locale chosen with `setlocale').
1627 * Ulrich Drepper has contributed a new suite of functions for operation on
1628 wide-character and multibyte-character strings, in <wchar.h>;
1629 and classification and case conversion of wide characters, in <wctype.h>.
1630 These new functions are conforming to the ISO C, Amendement 1 specification.
1632 * There is now a second implementation of the standard I/O library available.
1633 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1634 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1636 * You can now use positional parameter specifications in format strings
1637 for the `printf' and `scanf' families of functions. For example,
1638 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1639 ``Number 6, Mr Jones''. This is mainly useful when providing different
1640 format strings for different languages, whose grammars may dictate
1641 different orderings of the values being printed. To support this
1642 feature, the interface for `register_printf_handler' has changed; see
1643 the header file <printf.h> for details.
1645 * The `printf' and `scanf' families of functions now understand a new
1646 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1647 to group numbers as indicated by the locale; for `scanf' and friends, this
1648 says to accept as valid only a number with all the proper grouping
1649 separators in the right places. In the default "C" locale, numbers are
1650 not grouped; but locales for specific countries will define the usual
1651 conventions (i.e. separate thousands with `,' in the US locale).
1653 * The pgrp functions have been regularized, slightly incompatibly but much
1654 less confusingly. The core functions are now `getpgid' and `setpgid',
1655 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1656 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1657 provided for compatibility. There is no longer an incompatible `getpgrp'
1658 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1660 * The new header file <fts.h> and suite of functions simplify programs that
1661 operate on directory trees. This code comes from 4.4 BSD.
1663 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1664 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1665 NSS scheme used in glibc.
1667 * There is a new malloc debugging hook `__memalign_hook'.
1669 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1670 `unsigned int' in <sys/types.h>. These are for compatibility only and
1671 their use is discouraged.
1673 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1674 done differently, so that it works even without GNU ld.
1676 * New function `euidaccess' checks allowed access to a file like `access',
1677 but using the effective IDs instead of the real IDs.
1679 * The time zone data files have been updated for the latest and greatest
1680 local time conventions of the countries of the world.
1682 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1685 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1686 for formatting floating-point numbers. They are provided only for
1687 compatibility; new programs should use `sprintf' instead. There are
1688 also equivalent function for the `long double' floating-point type and
1689 all functions also exist in a reentrant form.
1691 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1692 functions for maintaining the login-record files (primarily of use to
1693 system programs such as `login'), and convenient functions for
1694 allocating and initializing a pseudo-terminal (pty) device.
1696 * Ulrich Drepper has contributed new support for System V style
1697 shared memory and IPC on systems that support it.
1699 * Ulrich Drepper has contributed several miscellaneous new functions found
1700 in System V: The `hsearch' family of functions provide an effective
1701 implementation of hash tables; `a64l' and `l64a' provide a very simple
1702 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1705 * Ulrich Drepper has contributed new reentrant counterparts for the
1706 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1708 * Ulrich Drepper has contributed new, highly-optimized versions of several
1709 string functions for the i486/Pentium family of processors.
1711 * Ulrich Drepper has updated the Linux-specific code, based largely
1712 on work done in Hongjiu Lu's version of GNU libc for Linux.
1713 The GNU library now supports Linux versions 2.0.10 and later,
1714 using the ELF object file format (i[3456]86-*-linux).
1716 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1718 * David Mosberger-Tang and Richard Henderson have ported the C library
1719 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1720 dynamic linking support for ELF/Alpha.
1722 * Richard Henderson contributed several Alpha optimized assembler function
1723 for arithmetic and string handling.
1725 * Ulrich Drepper has contributed a new set of message catalog functions to
1726 support multiple languages using the <libintl.h> interface, for use with
1727 his new package GNU gettext. Translation volunteers have contributed
1728 catalogs of the library's messages in Spanish, German, and Korean.
1730 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1731 program and the `catgets' function for reading the catalog files it
1732 creates. (The <libintl.h> interface is preferred; we include the
1733 <nl_types.h> interface using `catgets' only for source compatibility with
1734 programs already written to use it.)
1736 * New header file <values.h> gives SVID-compatible names for <limits.h>
1739 * Various new macros, declarations, and small header files for compatibility
1742 * New function `group_member' is a convenient way to check if a process has
1743 a given effective group ID.
1745 * When using GCC 2.7 and later, the socket functions are now declared in a
1746 special way so that passing an argument of type `struct sockaddr_in *',
1747 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1748 `struct sockaddr *' type, does not generate a type-clash warning.
1750 * New function `error' declared in header file <error.h> is a convenient
1751 function for printing error messages and optionally exiting; this is the
1752 canonical function used in GNU programs. The new functions `err', `warn',
1753 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1754 doing the same thing.
1756 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1757 POSIX.2 `glob' function to do ~ and {...} expansion.
1759 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1760 `clearenv' which is used in POSIX.9 is also available.
1762 * New function `getsid' returns session ID number on systems that support it.
1764 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1765 files <db.h> and <mpool.h> provide a rich set of functions for several
1766 types of simple databases stored in memory and in files, and <ndbm.h> is
1767 an old `ndbm'-compatible interface using the `db' functions. Link with
1768 `-ldb' to get these functions.
1770 * New macro `strdupa' copies a string like `strdup', but uses local stack
1771 space from `alloca' instead of dynamic heap space from `malloc'.
1773 * New function `strnlen' is like `strlen' but searches only a given maximum
1774 number of characters for the null terminator. `stpncpy', `strndup' and
1775 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1778 * New function `statfs' in header <sys/statfs.h>.
1780 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1781 provide convenient functions for operating on blocks of null-terminated
1784 * A new suite of functions in <utmp.h> handle all the details of reading
1785 and writing the utmp file.
1787 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1790 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1791 completely POSIX compliant and also implemented the extended functionality
1792 to handle alternate digit representation and alternate era date formats.
1794 * Ulrich Drepper provided an implementation of the `strptime' function
1795 defined in XPG4.2 which transforms a string into a `struct tm' value.
1797 * Paul Eggert provided the tzselect shell script as part of the timezone
1798 code. The shell script makes it easy to select the correct timezone
1801 * The implementation of the malloc family of functions is completely replaced
1802 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1803 The implementation uses the mmap function (if available) and it is
1804 optimized for the use in multi threaded programs.
1806 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1807 functions. This new functionality is usable by specifying a special
1808 salt string and it is compatible with implementation on *BSD systems.
1810 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1811 `getsubopt' to handle second level command line options, `bsd_signal'
1812 to access BSD style `signal' functionality, the obsolete `regexp' style
1815 * the `lchown' function is available on system which support this
1818 * The implementation of the shadow password handling function was contributed
1821 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1823 * POSIX.1g support was added. The <sys/select.h> header is available,
1824 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1825 implementation of `getaddrinfo'.
1829 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1831 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1832 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1834 * The new function `daemon' from 4.4 BSD is useful for server programs that
1835 want to put themselves in the background.
1837 * Joel Sherrill has contributed support for several standalone boards that
1838 run without an operating system.
1840 * `printf', `scanf' and friends now accept a `q' type modifier for long
1841 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1843 * All of the code taken from BSD (notably most of the math and networking
1844 routines) has been updated from the BSD 4.4-Lite release.
1846 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1848 * The new functions `getdomainname' and `setdomainname' fetch or change the
1849 YP/NIS domain name. These are system calls which exist on systems which
1852 * The time zone data files have been updated for the latest international
1855 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1856 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1860 * The C library now includes support for Sun RPC, from Sun's free
1861 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1862 are included. (There is still no support for YP.)
1864 * Tom Quinn has contributed a port of the C library to SGI machines running
1865 Irix 4 (mips-sgi-irix4).
1867 * The new `lockf' function is a simplified interface to the locking
1868 facilities of `fcntl', included for compatibility.
1870 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1872 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1874 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1877 * The error message printed by `assert' for a failed assertion now includes
1878 the name of the program (if using GNU ld) and the name of the calling
1879 function (with versions of GCC that support this).
1881 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1883 * The library now includes the <sys/mman.h> header file and memory
1884 management functions `mmap', `munmap', `mprotect', `msync', and
1885 `madvise', on systems that support those facilities.
1887 * The interface for `mcheck' has changed slightly: the function called to
1888 abort the program when an allocation inconsistency is detected now takes
1889 an argument that indicates the type of failure. The new function
1890 `mprobe' lets you request a consistency check for a particular block at
1891 any time (checks are normally done only when you call `free' or `realloc'
1894 * It is now possible to easily cross-compile the C library, building on one
1895 system a library to run on another machine and/or operating system. All
1896 you need to do is set the variable `HOST_CC' in `configparms' to the
1897 native compiler for programs to run on the machine you are building on (a
1898 few generator programs are used on Unix systems); set `CC' to the
1901 * The new function `fexecve' (only implemented on the GNU system) executes
1902 a program file given a file descriptor already open on the file.
1906 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1907 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1909 * You can set the variable `libprefix' in `configparms' to specify a prefix
1910 to be prepended to installed library files; this makes it easy to install
1911 the GNU C library to be linked as `-lgnuc' or whatever.
1913 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1914 copies a limited number of characters from a string, and returns the
1915 address of the last character written.
1917 * You no longer need to check for whether the installed `stddef.h' is
1918 compatible with the GNU C library. configure now checks for you.
1920 * You can now define a per-stream `fileno' function to convert the
1921 stream's cookie into an integral file descriptor.
1923 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1924 allocates zero bytes of storage, and returns a unique pointer which
1925 you can pass to `realloc' or `free'. The behavior is undefined if
1926 you dereference this pointer.
1928 * The C library now runs on Sony NEWS m68k machines running either
1929 NewsOS 3 or NewsOS 4.
1931 * The new `syscall' function is a system-dependent primitive function
1932 for invoking system calls. It has the canonical behavior on Unix
1933 systems, including unreliable return values for some calls (such as
1934 `pipe', `fork' and `getppid').
1936 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1937 to `EAGAIN', which is the preferred name. On systems whose kernels
1938 use two distinct codes, the C library now translates EWOULDBLOCK to
1939 EAGAIN in every system call function.
1943 * The GNU C Library Reference Manual is now distributed with the library.
1944 `make dvi' will produce a DVI file of the printed manual.
1945 `make info' will produce Info files that you can read on line using C-h i
1946 in Emacs or the `info' program.
1947 Please send comments on the manual to bug-glibc-manual@gnu.org.
1949 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1951 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1953 * Jason Merrill has contributed a port to the Sequent Symmetry running
1954 Dynix version 3 (i386-sequent-dynix).
1956 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1957 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1959 * New function `memory_warnings' lets you arrange to get warnings when
1960 malloc is running out of memory to allocate, like Emacs gives you.
1962 * The C library now contains the relocating allocator used in Emacs 19 for
1963 its editing buffers. This allocator (ralloc) minimizes allocation
1964 overhead and fragmentation by moving allocated regions around whenever it
1965 needs to. You always refer to a ralloc'd region with a "handle" (a
1966 pointer to a pointer--an object of type `void **').
1968 * There is a new `printf' format: `%m' gives you the string corresponding
1969 to the error code in `errno'.
1971 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1972 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1973 pass, the `a' modifier says to fill in a `char **' you pass with a
1976 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1977 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1978 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1980 * `mkstemp' is a traditional Unix function to atomically create and open a
1981 uniquely-named temporary file.
1985 * The standard location for the file that says what the local timezone is
1986 has changed again. It is now `/usr/local/etc/localtime' (or more
1987 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1989 * The distribution no longer contains any files with names longer than 14
1992 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1993 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1995 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1999 * The configuration process has changed quite a bit. The `configure'
2000 script is now used just like the configuration scripts for other GNU
2001 packages. The `sysdeps' directory hierarchy is much rearranged.
2002 The file `INSTALL' explains the new scheme in detail.
2004 * The header files no longer need to be processed into ANSI C and
2005 traditional C versions. There is just one set of files to install, and
2006 it will work with ANSI or old C compilers (including `gcc -traditional').
2008 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2009 MIPS DECStation running Ultrix 4.
2011 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2012 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2013 made itself into a shared library.
2015 * Yet further improved support for the i386, running 4.3 BSD-like systems
2016 (such as Mach 3 with the Unix single-server), or System V.
2018 * New function `strncasecmp' to do case-insensitive string comparison
2019 with limited length.
2021 * New function `strsep' is a reentrant alternative to `strtok'.
2023 * New functions `scandir' and `alphasort' for searching directories.
2025 * New function `setenv' is a better interface to `putenv'.
2027 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2028 function for traversing a directory tree.
2030 * The GNU obstack package is now also part of the C library.
2031 The new function `open_obstack_stream' creates a stdio stream that
2032 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2033 formatted output directly to an obstack.
2035 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2036 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2038 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2040 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2041 things to your strings.
2043 * There are some new test programs: test-fseek, testmb, and testrand.
2045 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2046 These ports are not finished, but are a good starting place for really
2047 supporting those systems.
2049 * `/etc/localtime' is now the standard location for the file that says what
2050 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2051 This follows the general principle that `/etc' is the place for all local
2052 configuration files.
2054 * The C library header files now use `extern "C"' when used by the C++
2055 compiler, so the C library should now work with C++ code.
2057 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2058 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2061 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2062 function which uses the `merge sort' algorithm, and is said to be
2063 significantly faster than the old GNU `qsort' function. Merge sort is
2064 now the standard `qsort' function. The new algorithm can require a lot
2065 of temporary storage; so, the old sorting function is called when the
2066 required storage is not available.
2068 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2069 provides the Unix `crypt' function, plus some other entry points.
2071 * The code and header files taken from 4.4 BSD have been updated with the
2072 latest files released from Berkeley.
2074 ----------------------------------------------------------------------
2075 Copyright information:
2077 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
2079 Permission is granted to anyone to make or distribute verbatim copies
2080 of this document as received, in any medium, provided that the
2081 copyright notice and this permission notice are preserved,
2082 thus giving the recipient permission to redistribute in turn.
2084 Permission is granted to distribute modified versions
2085 of this document, or of portions of it,
2086 under the above conditions, provided also that they
2087 carry prominent notices stating who last changed them.
2090 version-control: never
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