1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2012 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6778, 6808, 9685,
13 9914, 10014, 10038, 10631, 11438, 11607, 11638, 12140, 13412, 13542,
14 13601, 13629, 13679, 13696, 13717, 13741, 13939, 13966, 14042, 14047,
15 14090, 14150, 14151, 14152, 14154, 14157, 14166, 14173, 14195, 14237,
16 14251, 14252, 14283, 14298, 14303, 14307, 14328, 14331, 14336, 14337,
17 14347, 14349, 14376, 14417, 14459, 14476, 14477, 14505, 14510, 14516,
18 14518, 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562,
19 14568, 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638,
20 14645, 14648, 14652, 14660, 14661, 14669, 14683, 14694, 14716, 14743,
21 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14805, 14811.
23 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
24 Optimized versions of memcpy, memset, and memcmp added for System z10 and
26 Implemented by Andreas Krebbel.
28 * The new function secure_getenv allows secure access to the environment,
29 returning NULL if running in a SUID/SGID process. This function replaces
30 the internal function __secure_getenv.
32 * SystemTap static probes have been added into the dynamic linker.
33 Implemented by Gary Benson.
35 * Optimizations of string functions strstr, strcasestr and memmem.
36 Implemented by Maxim Kuvyrkov.
38 * The minimum Linux kernel version that this version of the GNU C Library
39 can be used with is 2.6.16.
41 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
42 powerpc POWER7. Implemented by Will Schmidt.
44 * New configure option --disable-nscd builds the C library such that it
45 never attempts to contact the Name Service Caching Daemon (nscd).
46 New configure option --disable-build-nscd avoids building nscd itself;
47 this is the default if --disable-nscd is used.
49 * The ttyname and ttyname_r functions on Linux now fall back to searching for
50 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
51 allows creation of chroots without the procfs mounted on /proc.
53 * The `crypt' function now fails if passed salt bytes that violate the
54 specification for those values. On Linux, the `crypt' function will
55 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
56 enabled, and fail on encrypted strings using the MD5 or DES algorithm
57 when the mode is enabled.
59 * The `clock_*' suite of functions (declared in <time.h>) is now available
60 directly in the main C library. Previously it was necessary to link with
61 -lrt to use these functions. This change has the effect that a
62 single-threaded program that uses a function such as `clock_gettime' (and
63 is not linked with -lrt) will no longer implicitly load the pthreads
64 library at runtime and so will not suffer the overheads associated with
65 multi-thread support in other code such as the C++ runtime library.
69 * The following bugs are resolved with this release:
71 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
72 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
73 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
74 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
75 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
76 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
77 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
78 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
79 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
80 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
81 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
82 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
83 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
84 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
85 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
86 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
87 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
88 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
89 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
90 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
91 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
92 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
95 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
96 configuring glibc with:
97 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
98 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
99 Implemented by H.J. Lu.
103 + define static_assert
105 + do not declare gets
107 + declare at_quick_exit and quick_exit also for ISO C11
109 + aligned_alloc. NB: The code is deliberately allows the size parameter
110 to not be a multiple of the alignment. This is a moronic requirement
111 in the standard but it is only a requirement on the caller, not the
116 + uchar.h support added
118 + CMPLX, CMPLXF, CMPLXL added
120 Implemented by Ulrich Drepper.
122 * Support for the IA-64 has been moved to ports.
124 * Remove support for anything but ELF binary format
126 * Checking versions of poll, ppoll added.
127 Implemented by Ulrich Drepper.
129 * More generic and 64-bit performance optimizations to math functions.
130 Implemented by Ulrich Drepper.
132 * New configure option --enable-obsolete-rpc makes the deprecated RPC
133 headers and functions available at compile time as they were before
134 version 2.14. This option will be removed at some time in the future
135 after the TI-RPC library becomes fully sufficient for the needs of
136 existing applications.
138 * Compatibility code for Linux kernel versions before 2.4 has been removed.
139 Note that glibc is not expected to work with any Linux kernel version
142 * New header <sys/auxv.h> and function getauxval allowing easy access to
143 the AT_* key-value pairs passed from the Linux kernel. The header also
144 defines the HWCAP_* bits associated with the AT_HWCAP key.
146 * New locales: mag_IN
148 * New configure option --enable-systemtap builds SystemTap static probes
149 into libc for setjmp and longjmp and into libpthread for various operations.
150 So far the setjmp/longjmp probes and some of the libpthread probes are
151 provided only for i*86 and x86_64.
152 Implemented by Roland McGrath and Rayson Ho.
154 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
156 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
159 * More optimized functions for SPARC. Implemented by David S. Miller.
161 * Improved support for cross-compilation, especially bootstrap builds
162 without a previously built glibc.
164 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
165 Chris Metcalf from Tilera.
167 * Support for the old ARM ABI has been removed from ports. Only the EABI is
168 now supported for ARM processors.
170 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
171 as the name of the dynamic linker, to distinguish it from the
172 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
174 * Support for CRIS has been removed from ports.
176 * A new class of installed header has been documented for low-level
177 platform-specific functionality. PowerPC added the first instance with a
178 function to provide time base register access. Contributed by Tulio
179 Magno Quites Machado Filho.
181 * ix86 configurations now install header files that are consistent with
182 what x86-64 configurations install. These same header files can be used
183 for -m32, -m64, or -mx32 builds.
184 Contributed by H.J. Lu.
186 * Math library bug fixes. A thorough audit of all open math library bugs was
187 conducted by Joseph Myers. Significant progress was made on many math
188 library bugs resulting in more accurate exceptions and function results.
189 Many thanks to all those that contributed including Andreas Jaeger for his
190 patch review and work on the x87 trigonometric instruction issues.
192 * Timezone data is no longer installed. Timezone-related binaries and scripts
193 will continue to be installed. Users should obtain their timezone data from
194 their distribution provider or from the tzdata package at
195 <ftp://munnari.oz.au/pub/>.
199 * The following bugs are resolved with this release:
201 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
202 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
203 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
204 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
205 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
206 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
207 13484, 13506, 13515, 13523, 13524, 13538, 13540
209 * New program pldd to list loaded object of a process
210 Implemented by Ulrich Drepper.
212 * Add nss_db support back to glibc. No more dependency on Berkeley db
213 and support for initgroups lookups.
214 Implemented by Ulrich Drepper.
216 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
217 Contributed by HJ Lu.
219 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
220 Contributed by HJ Lu.
222 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
223 on x86-32 and x86-64.
224 Contributed by Liubov Dmitrieva.
226 * Optimized strchr and strrchr for SSE on x86-32.
227 Contributed by Liubov Dmitrieva.
229 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
230 for x86-64 and x86-32.
231 Contributed by Liubov Dmitrieva.
233 * New interfaces: scandirat, scandirat64
234 Implemented by Ulrich Drepper.
236 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
237 Implemented by Ulrich Drepper.
239 * nscd now also caches the netgroup database.
240 Implemented by Ulrich Drepper.
242 * Integrate libm with gcc's -ffinite-math-only option.
243 Implemented by Ulrich Drepper.
245 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
246 to math functions. Implemented by Ulrich Drepper.
248 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
249 Implemented by Ulrich Drepper.
251 * New Linux interfaces: process_vm_readv, process_vm_writev
253 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
254 Implemented by Ulrich Drepper.
256 * Optimized nearbyint and strcasecmp for PPC.
257 Implemented by Adhemerval Zanella.
259 * New locales: bho_IN, unm_US, es_CU, ta_LK
263 * The following bugs are resolved with this release:
265 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
266 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
267 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
268 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
269 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
270 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
271 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
272 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
273 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
274 12795, 12811, 12813, 12814, 12841
276 * The RPC implementation in libc is obsoleted. Old programs keep working
277 but new programs cannot be linked with the routines in libc anymore.
278 Programs in need of RPC functionality must be linked against TI-RPC.
279 The TI-RPC implementation is IPv6 enabled and there are other benefits.
281 Visible changes of this change include (obviously) the inability to link
282 programs using RPC functions without referencing the TI-RPC library and the
283 removal of the RPC headers from the glibc headers.
284 Implemented by Ulrich Drepper.
286 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
287 syncfs, setns, sendmmsg
289 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
290 yue_HK, lij_IT, mhr_RU
292 * New encodings: CP770, CP771, CP772, CP773, CP774
294 * New program sotruss to trace calls through PLTs
295 Implemented by Ulrich Drepper.
297 * The malloc hook implementation is marked deprecated and will be removed
298 from the default implementation in the next version. The design never
299 worked ever since the introduction of threads. Even programs which do
300 not create threads themselves can use multiple threads created internally.
304 * The following bugs are resolved with this release:
306 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
307 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
308 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
309 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
312 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
314 * POWER7 optimizations: memset, memcmp, strncmp
316 * New optimized string functions for x86-64: strnlen (SSE2),
317 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
318 Implemented by Ulrich Drepper.
322 * The following bugs are resolved with this release:
324 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
325 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
326 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
327 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
328 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
329 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
330 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
331 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
333 * New interfaces: pthread_getname_np, pthread_setname_np
335 * New Linux interface: recvmmsg
337 * STT_GNU_IFUNC implemented for Sparc by David Miller.
339 * The dynamic linker now recognizes supported ABI versions from the
340 EI_ABIVERSION field in the ELF header.
341 Implemented by Ulrich Drepper.
343 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
344 will not be used to fill in password fields in the passwd.byname replies.
345 Instead it is used to synthesize the shadow.byname table, should it be
346 missing. This is a useful mode in some installations involving Solaris.
347 Implemented by Ulrich Drepper.
349 * New locales: kok_IN, sq_MK, cv_RU
353 * The following bugs are resolved with this release:
355 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
356 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
357 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
358 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
359 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
360 10789, 10817, 10823, 10840, 10847
362 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
364 Implemented by Ulrich Drepper.
366 * Checking version of longjmp added that fails if an uninitialized stack
367 frame would be created. Implemented by Ulrich Drepper.
369 * STT_GNU_IFUNC is now supported in static executables.
370 Implemented by H.J. Lu.
372 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
374 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
375 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
376 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
377 Contributed by H.J. Lu.
379 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
380 Implemented by Ulrich Drepper.
382 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
384 Contributed by H.J. Lu.
386 * Support for fma instruction in AVX on x86-64.
387 Implemented by H.J. Lu and Ulrich Drepper.
389 * AVX support in x86-64 auditing support in ld.so.
390 Implemented by H.J. Lu.
392 * STB_GNU_UNIQUE support added.
393 Implemented by Ulrich Drepper.
395 * Implement second fallback mode for optimized DNS lookup for even more
396 broken environments. If two requests from the same port are not
397 handled correctly close the socket and open a new one before sending
398 the second request. The 'single-request-reopen' option in /etc/resolv.conf
399 can be used to select this mode right away, instead of rediscovering the
400 necessity is every process again.
401 Implemented by Ulrich Drepper.
403 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
404 Implemented by Adam Tkac.
406 * Optimized iconv conversions for S390x.
407 Implemented by Andreas Krebbel.
409 * Using condvars with PI mutexes is now more efficient due to kernel
410 support for requeueing to PI futexes. NPTL support added for x86-64.
411 Implemented by Ulrich Drepper.
413 * New locales: ps_AF, my_MM
417 * The following bugs are resolved with this release:
419 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
420 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
421 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
422 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
423 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
425 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
426 Implemented by Ulrich Drepper.
428 * New Linux interfaces: accept4, fallocate, fallocate64.
429 Implemented by Ulrich Drepper.
431 * Correct declarations of string function when used in C++ code. This
432 could lead to compile errors for invalid C++ code.
434 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
437 * New POSIX 2008 interface: psiginfo
438 Implemented by Ulrich Drepper.
440 * New ISO C++1x interfaces: quick_exit, at_quick_exit
441 Implemented by Ulrich Drepper.
443 * Support for selecting between multiple function definitions at runtime
444 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
446 * The libcrypt library can now use the hash function implementations in
447 NSS. Implemented by Ulrich Drepper.
449 * The malloc implementation can be compiled to be less memory efficient
450 but higher performing in multi-threaded programs.
451 Implemented by Ulrich Drepper.
453 * New locales: nan_TW@latin, ks_IN
455 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
456 Implemented by Ulrich Drepper.
458 * Extended printf hook support. It is possible to use user-defined types
459 and extend existing format specifiers.
460 Implemented by Ulrich Drepper.
462 * Handling for group shadow files has been added.
463 Implemented by Ulrich Drepper.
465 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
466 servers (the case, e.g., for some people using the built-in DNS
467 server in ADSL modems/routers). There is a once-per-process timeout
468 in case of a broken server. To avoid it, users can run nscd or put
469 'options single-request' in /etc/resolv.conf.
470 Implemented by Ulrich Drepper.
474 * The following bugs are resolved with this release:
476 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
477 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
478 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
479 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
480 6968, 6974, 6980, 6995, 7008, 7009, 7029
482 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
483 up at the same time. Implemented by Ulrich Drepper.
485 * TLS descriptors for LD and GD on x86 and x86-64.
486 Implemented by Alexandre Oliva.
488 * getaddrinfo now handles DCCP and UDPlite.
489 Implemented by Ulrich Drepper.
491 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
492 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
493 Implemented by Ulrich Drepper.
495 * New implementation of memmem, strstr, and strcasestr which is O(n).
496 Implemented by Eric Blake.
498 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
500 * Implement "e" option for popen to open file descriptor with the
501 close-on-exec flag set. Implemented by Ulrich Drepper.
503 * Implement "b" mode for fmemopen. In this mode writes writes don't
504 implicitly add a NUL byte and seeks from the end of the buffer really
505 use the buffer end, not the string length as the basis.
506 Implemented by Ulrich Drepper.
508 * Many functions, exported and internal, now atomically set the close-on-exec
509 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
511 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
513 Implemented by Pravin Satpute.
515 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
519 * The following bugs are resolved with this release:
521 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
522 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
523 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
524 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
525 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
526 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
527 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
529 * New locales: bo_CN, bo_IN, shs_CA.
531 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
533 * Sorting rules for some Indian languages (Devanagari and Gujarati).
534 Implemented by Pravin Satpute.
536 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
538 * nscd caches now all timeouts for DNS entries
539 Implemented by Ulrich Drepper.
541 * nscd is more efficient and wakes up less often.
542 Implemented by Ulrich Drepper.
544 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
545 vdprintf, and obstack_vprintf.
546 Implemented by Jakub Jelinek.
548 * Faster memset for x86-64.
549 Implemented by Harsha Jagasia and H.J. Lu.
551 * Faster memcpy on x86.
552 Implemented by Ulrich Drepper.
554 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
555 Implemented by Ulrich Drepper.
557 * Faster sqrt and sqrtf implemention for some PPC variants.
558 Implemented by Steven Munroe.
562 * The following bugs are resolved with this release:
564 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
565 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
566 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
567 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
568 5071, 5103, 5104, 5112, 5113, 5184, 5186
570 * More checking functions: fread, fread_unlocked, open*, mq_open.
571 Implemented by Jakub Jelinek and Ulrich Drepper.
573 * Extend fortification to C++. Implemented by Jakub Jelinek.
575 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
576 by not recognizing 'a' as a modifier when those specs are requested.
577 Implemented by Jakub Jelinek.
579 * PPC optimizations to math and string functions.
580 Implemented by Steven Munroe.
582 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
583 options to be passed. Implemented by Ulrich Drepper.
585 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
587 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
588 Implemented by Ulrich Drepper.
590 * Handle private futexes in the NPTL implementation.
591 Implemented by Jakub Jelinek and Ulrich Drepper.
593 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
594 Implemented by Roland McGrath and Ulrich Drepper.
596 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
598 * SHA-256 and SHA-512 based password encryption.
599 Implemented by Ulrich Drepper.
601 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
602 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
605 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
606 Implemented by Ulrich Drepper.
610 * The following bugs are resolved with this release:
612 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
613 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
614 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
615 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
616 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
617 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
618 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
621 * New Linux interfaces: epoll_pwait, sched_getcpu.
623 * New generic interfaces: strerror_l.
625 * nscd can now cache the services database. Implemented by Ulrich Drepper.
629 * The following bugs are resolved with this release:
631 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
632 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
633 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
634 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
635 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
636 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
637 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
638 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
639 3225, 3251, 3252, 3253, 3273
641 * For Linux, the sorting of addresses returned by getaddrinfo now also
642 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
643 Implemented by Ulrich Drepper.
645 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
646 Implemented by Ulrich Drepper.
648 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
650 * New iconv module for MIK. Contributed by Alexander Shopov.
652 * For sites with broken group and/or passwd database, the auto-propagate
653 option of nscd can prevent creating ID lookup entries from the results
654 of a name lookup and vice versa. This usually is no problem but some
655 site might have problems with the default behavior.
656 Implemented by Ulrich Drepper.
658 * Iterating over entire database in NIS can be slow. With the
659 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
660 to trade time for memory. The entire database will be read at once.
661 Implemented by Ulrich Drepper.
663 * The interfaces introduced in RFC 3542 have been implemented by
666 * Support for the new ELF hash table format was added by Ulrich Drepper.
668 * Support for priority inheritance mutexes added by Jakub Jelinek and
671 * Support for priority protected mutexes added by Jakub Jelinek.
673 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
674 or_IN, csb_PL, fy_NL, sr_ME.
678 * More overflow detection functions.
680 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
681 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
683 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
684 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
685 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
686 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
687 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
688 by Masahide Washizawa.
690 * It is now possible to install audit libraries for the dynamic linker using
691 LD_AUDIT. Implemented by Ulrich Drepper.
693 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
694 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
695 For a libc and libpthread that works well on Linux 2.4 kernels, we
696 recommend using the stable 2.3 branch.
698 * The new function open_wmemstream acts like open_memstream,
699 but uses a wchar_t wide character buffer.
701 * The new function ppoll is an improved version of poll, similar to pselect.
703 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
704 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
705 renameat, unlinkat, linkat, symlinkat, readlinkat.
707 * New Linux kernel system calls: unshare,
708 inotify_init, inotify_add_watch, inotify_rm_watch.
710 * The euidaccess function is now also known by the alias eaccess,
711 for compatibility with some other systems.
713 * Timezone data updated to 2006b version.
717 * The following bugs are resolved with this release:
719 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
720 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
721 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
722 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
723 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
724 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
726 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
728 * As of this release, GCC 4 can be used to compile the C Library.
730 * Timezone data updated to 2005m version.
734 * The following bugs are resolved with this release:
736 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
737 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
738 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
739 777, 787, 821, 822, 823, 825
741 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
745 * Support for RFC 3678. Real implementations exist only for Linux so far.
746 Implemented by Ulrich Drepper.
748 * nscd can now cache entries persistently. Expiring entries are reloaded.
749 For speedups the cache can be shared in memory with client processes.
750 Implemented by Ulrich Drepper.
752 * nscd can now perform SELinux checks.
753 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
755 * getaddrinfo queries are now cached. Canonical name lookup is performed
757 Implemented by Ulrich Drepper.
759 * The nothrow function attribute is used when headers are used by gcc when
760 compiling C code. This can avoid significant amounts of exception
763 * The malloc functions perform more error checking and are stricter when
764 it comes to reacting on errors. The default action is to terminate
765 the process after showing an error message. Implemented by Ulrich Drepper.
767 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
768 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
770 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
771 namespaces using the new function dlmopen(). This feature is of course,
772 like most other dynamic loading functionality, not available in statically
773 linked applications. Implemented by Ulrich Drepper.
775 * Low-overhead boundary checking variants of string and some stdio functions
776 were added. These are to be used in conjunction with a gcc patch by
777 Jakub Jelinek which adds calls to these functions if possible.
778 Implemented by Jakub Jelinek and Ulrich Drepper.
780 * Old code for several operating systems and machine architectures that
781 have not been in working condition in a long time have been removed from
782 the main source tree maintained by the GNU C Library's maintainers.
783 These files are now reside in the separate `ports' source module
784 that is usable as an add-on when building the library.
788 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
789 interrogate the dynamic linker, compatible with the Solaris interface.
791 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
792 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
794 * getifaddrs now uses the netlink interface on Linux to get its information.
795 Implemented by Thorsten Kukuk.
797 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
798 Implemented by Ulrich Drepper.
800 * support for non-executable stacks on x86 has been added. Changes mostly
803 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
806 * getaddrinfo now performs destination address selection according to
811 * Thread-safe interfaces for many functions that access locale data
812 were added in version 2.3, but these features were omitted from NEWS.
813 Many functions have variants with an `_l' suffix that take a `locale_t'
814 object as a parameter rather than consulting the current locale.
815 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
816 create and maintain `locale_t' objects. Additionally, the new function
817 `uselocale' sets "the current locale" (as used by functions not so
818 parameterized) set for an individual thread. These features were added
819 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
821 * The functions getresuid, getresgid, setresuid, and setresgid, which
822 have long been available on Linux, are now declared in <unistd.h>
823 and are now also available on the Hurd.
825 * ELF thread-local storage support (TLS) now works on x86-64.
827 * The new dynamic string token $LIB is expanded in shared library names.
828 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
830 * Aldy Hernandez contributed complete software floating point support for
831 PowerPC machines with no FPU.
833 * fexecve is implemented on Linux.
835 * The `btowc' function should work at least twice as fast due to
836 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
838 * With approriate thread add-ons cancelable functions are now implemented
839 in libc.so as well. No need to call the function in libpthread. This
840 change allowed to finally disable the incorrect and expensive handling
841 of weak definition in ld.so.
843 * Yet more PLT entries in libc.so have been removed. We finally arrived
844 at the bare minimum. Startup times improved appropriately.
846 * Support for the new Linux/x86 system call interface was added. The
847 AT_SYSINFO auxiliary vector entry is recognized and handled.
851 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
854 * iconv (the program and the interface) now accepts empty names (excluding
855 options like //TRANSLIT) to mean "use charset of current locale".
857 * localedef can now transliterate characters in strings which are not in
858 the provided charmap. The information from the input locale is used.
860 * Prelinking support was added for ELF targets. This requires additional
861 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
863 * Read-only stdio streams now use mmap to speed up operation by eliminating
864 copying and buffer underflows. To use add 'm' to the mode string of
865 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
867 * The malloc functions were completely rewritten by Wolfram Gloger based
868 on Doug Lea's malloc-2.7.0.c.
870 * Isamu Hasegawa contributed a completely new and POSIX-conformant
871 implementation of regex.
873 * Bruno Haible upgraded the iconv and locale implementation to support
876 * Contents of the LC_* and LANG environment variables in the CEN style are
877 not recognized anymore. It never was used. Change by Ulrich Drepper.
879 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
880 thread-local storage (TLS) ABI on some platforms.
881 Changes by Ulrich Drepper. SH support by Kaz Kojima.
883 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
884 EUC-JISX0213, and TSCII.
886 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
887 BSD-compatible interface for getting all network interface addresses.
888 Implementation for IPv4 by Roland McGrath.
890 * Loading of locale data is faster due to the introduction of a locale
891 archive. Implemented by Roland McGrath and Ulrich Drepper.
893 * Startup times are significantly reduced by not using exported functions
894 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
897 * Steven Munroe contributed a port to PowerPC64/Linux.
901 * The Hurd now uses the GNU libio implementation of stdio rather than the
902 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
904 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
905 with the same behavior as the Linux system call of the same name.
909 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
910 128-bit long double format.
912 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
913 IBM1161, and IBM1162 charsets.
915 * Andreas Jaeger contributed a port to x86-64/Linux.
917 * Peter Bruin contributed a port to PowerPC/Hurd.
919 * libc functions using I/O streams now can handle wide-oriented streams
922 * optimizations in the dynamic linker. Binaries created by recent binutils
923 versions start up quicker due to reduced time spent on relocations.
925 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
929 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
930 asinh, atanh, j0 for the 128-bit long double format.
932 * Bruno Haible updated all the code handling Unicode in some form to
935 * Speed of regex for single-byte locales is back to previous levels.
936 Patch by Isamu Hasegawa.
938 * Alpha, SPARC, and IA-64 now also using floating stacks.
940 * Startup time of internationalized applications greatly improved through
941 iconv cache. Use iconvconfig to generate the cache file.
942 Contributed by Ulrich Drepper.
944 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
945 severe performance problems. Patch by David Mosberger.
947 * The Hurd port got a lot more functionality like AIO, various stdio
948 extensions, etc. Mainly done by Roland McGrath.
950 * mtrace can now lookup symbols in shared libraries.
954 * Intel's IA-64 math library is largely integrated. It provides fast and
955 accurate implementatations for most basic and standard math functions
956 in float, double, and long double format.
958 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
959 and asin for the 96-bit long double format and asin, log, tan for the
960 128-bit long double format.
962 * The beginning of a last-bit accurate math library by IBM Haifa were added.
963 The basic double functions exist today. Contributed by Abraham Ziv
964 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
965 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
967 * An asynchronous name lookup library was added. The interface is designed
968 after POSIX AIO. The proposal was circulated beforehand to get comments.
969 No negative ones came in. Implemented by Ulrich Drepper.
971 * Port to S390/64bit contributed by Martin Schwidefsky
972 <schwidefsky@de.ibm.com>.
974 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
975 of functions for Linux/IA-64.
977 * The RPC code is now thread safe. Threads can now use the same service
978 of different services at the same time. Patch by Eric Norum
979 <eric.norum@usask.ca> with some help by Ulrich Drepper.
981 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
982 family of functions for Linux/S390.
984 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
985 of functions for Linux/x86.
987 * Port to Linux/CRIS contributed by Axis Communications.
991 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
992 we can now check for namespace violations and missing declarations. The
993 result is that almost all headers are now Unix-compliant (as defined in
994 the upcoming XPG6). The negative side is that some programs might need
995 corrections, too, if they depend on the incorrect form of the headers in
996 previous versions which defined too many symbols and included too many
999 * regex now handles multibyte character sets correctly.
1000 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1002 * iconv (the program) does now conform to the upcoming XPG6 and handles
1003 charmaps. Instead of the charset names the path of charmaps can be
1004 provided and the conversion happens based on this data.
1005 Contributed by Ulrich Drepper.
1007 * The locale program now provides detailed information about the installed
1012 only lists the names of the supported locales
1016 provides details such as country, language, and codeset name.
1017 Contributed by Ulrich Drepper.
1021 * The gencat program now parses the input file according to the charset
1022 selected by the LC_CTYPE category. This is important for stateful
1023 character sets. To make generating catalogs easier there is a way
1024 to overwrite the charset selected by the locale: before the first
1025 message or $ quote line the catalog can contain a line like
1027 $ codeset=ISO-8859-2
1029 to select the charset (ISO-8859-2 in this case).
1031 Implemented by Shinya Hanataka and Ulrich Drepper.
1033 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1034 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1035 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1037 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1038 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1040 * The LANGUAGE environment variable is now ignored unless the locale is
1041 changed from the default "C" locale.
1043 * The usual bug fixes.
1047 * Greg McGary added runtime support for bounds checking using gcc's
1048 new -fbounded-pointers option. ix86 target is complete. PowerPC
1051 * Thorsten Kukuk added secure mode support to nscd.
1053 * The Berkeley db libraries have been removed.
1055 Related, the nss_db module is now in a separate package since it
1056 obviously requires a database library being available.
1058 * Wide character I/O streams implemented by Ulrich Drepper.
1060 * Functions from the extended socket API added by Ulrich Drepper.
1062 * Functions feenableexcept and fedisableexcept to control the
1063 behaviour of individual exceptions have been added by Andreas Jaeger.
1065 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1067 * The resolver code has been updated from bind 8.2.3-T5B which supports
1068 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1071 This change could in some situations effect backward compatibility. Since
1072 now `_res' is a thread-local instead of a global variable, modifying it
1073 in one thread does not have any effect in other threads.
1075 The resolver library was also extended to allow IPv6 as the transport
1076 protocol for the requests. This work was done by Stig Venaas.
1078 * Compatibility code for K&R C compilers has been removed from the
1079 header files. A ISO C compiler is needed to use the library
1080 (conforming to either C89 or C99 standard).
1082 * Complete rewrite of the localedef program to support multibyte character
1083 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1084 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1085 Implemented by Ulrich Drepper.
1087 Bruno Haible significantly improved the generation and use of the data
1088 structures for the wide character tables.
1090 * Plural handling in gettext implemented by Ulrich Drepper.
1092 * The utmp daemon has been removed.
1094 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1096 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1099 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1101 * POSIX barriers implemented by Kaz Kylheku.
1103 * POSIX spawn function family implemented by Ulrich Drepper.
1105 * POSIX spinlocks are now available.
1107 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1109 * the configure option --enable-kernel=X.Y.Z allows to strip out
1110 compatibility for kernel versions before X.Y.Z. This is currently only
1111 implemented for Linux.
1113 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1114 field sin6_scope_id. This means that all programs using IPv6 should be
1115 recompiled. Don't expect binary compatibility with previous glibc
1118 * various conversion modules for IBM character sets contributed by
1121 * IA-64 port by Jes Sorensen and HJ Lu.
1135 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1137 * New xdr functions are added; some rpc functions are now 64bit clean.
1139 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1141 * Fixed known incompatibilities with glibc 2.0.
1143 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1145 * Optimized a number of functions (especially the ELF dynamic loader).
1147 * Update timezone data files.
1149 * lots of charmaps corrections
1151 * some new locale definitions and charmaps
1156 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1157 conform to POSIX member type requirements. Symbol versions have been
1158 adjusted as needed within the library, and for direct use by applications,
1159 but there is potential for problems if third-party libraries use
1160 struct timeval as part of their interface. This does not present
1161 a problem for X and other "essential" system libraries.
1163 * An additional locale model to support C++ Standard Library locale
1164 model and probably more was implemented by Ulrich Drepper.
1166 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1169 * Miles Bader provided the `argp' function family to support hierachical
1170 command line argument parsing, layered on top of getopt.
1172 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1174 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1177 * scanf recognizes the %a and %A format for scanning floating point numbers.
1179 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1180 information and interfaces for the available integer types.
1182 * about 130 new math functions were added to implement the ISO C9x math
1185 * the new header <complex.h> contains definitions of the complex math
1186 functions from ISO C 9X.
1188 * the new header <tgmath.h> defines generic macros to use complex or
1189 real valued functions.
1191 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1193 * Andreas Jaeger provided a test suite for the math library.
1195 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1197 * Ulrich Drepper added character set conversion functions (iconv).
1199 * Optimized string functions have been added.
1201 * The localedata addon is now part of glibc.
1203 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1205 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1206 daemon for NSS (nscd).
1208 Missing a better place here are some numbers on improvements. Under
1209 Linux 2.1.125 un-tar-ing the kernel sources takes
1213 using local files 12.19s 6.88s 22.91s
1215 using NIS 13.92s 8.91s 26.34s
1217 using NIS & nscd 10.37s 7.34s 25.30s
1219 using NIS+ 27.57s 30.37s 640.46s
1221 using NIS+ & nscd 10.25s 7.83s 26.51s
1223 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1225 Keep in mind that non-namelookup related operations dominate above times.
1226 It was just a common complain that using NIS+ unpacking the kernel is
1229 [1] The old nscd implementation is not available anymore since it was
1230 distributed with glibc up to version 2.0.98 and thus is now replaced.
1232 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1234 * Mark Kettenis provided a Hesiod NSS module.
1236 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1237 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1239 * rcmd can now handle netgroups (Dick Streefland).
1241 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1244 * Support for the IPv6 protocol has been added to the socket API, as per the
1245 latest draft standards.
1247 * Support for Linux 2.2 has been added.
1249 * Interface changes relative to the latest 2.0.x release:
1250 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1251 addseverity NEW: Unix98
1252 alphasort64 NEW: LFS
1253 argp_err_exit_status NEW: argp, GNU ext
1254 argp_error NEW: argp, GNU ext
1255 argp_failure NEW: argp, GNU ext
1256 argp_help NEW: argp, GNU ext
1257 argp_parse NEW: argp, GNU ext
1258 argp_program_bug_address NEW: argp, GNU ext
1259 argp_program_version NEW: argp, GNU ext
1260 argp_program_version_hook NEW: argp, GNU ext
1261 argp_state_help NEW: argp, GNU ext
1262 argp_usage NEW: argp, GNU ext
1263 authdes_create NEW: Secure RPC
1264 authdes_getucred NEW: Secure RPC
1265 authdes_pk_create NEW: Secure RPC
1266 backtrace NEW: GNU ext.
1267 backtrace_symbols NEW: GNU ext.
1268 backtrace_symbols_fd NEW: GNU ext.
1270 cacosf NEW: ISO C 9x
1271 cacosh NEW: ISO C 9x
1272 cacoshf NEW: ISO C 9x
1273 cacoshl NEW: ISO C 9x
1274 cacosl NEW: ISO C 9x
1281 casinf NEW: ISO C 9x
1282 casinh NEW: ISO C 9x
1283 casinhf NEW: ISO C 9x
1284 casinhl NEW: ISO C 9x
1285 casinl NEW: ISO C 9x
1287 catanf NEW: ISO C 9x
1288 catanh NEW: ISO C 9x
1289 catanhf NEW: ISO C 9x
1290 catanhl NEW: ISO C 9x
1291 catanl NEW: ISO C 9x
1292 cbc_crypt NEW: Secure RPC
1296 ccoshf NEW: ISO C 9x
1297 ccoshl NEW: ISO C 9x
1303 cimagf NEW: ISO C 9x
1304 cimagl NEW: ISO C 9x
1305 clearerr_locked REMOVED
1306 clntunix_create NEW: sunrpc ext
1308 clog10 NEW: ISO C 9x
1309 clog10f NEW: ISO C 9x
1310 clog10l NEW: ISO C 9x
1320 cprojf NEW: ISO C 9x
1321 cprojl NEW: ISO C 9x
1323 crealf NEW: ISO C 9x
1324 creall NEW: ISO C 9x
1329 csinhf NEW: ISO C 9x
1330 csinhl NEW: ISO C 9x
1333 csqrtf NEW: ISO C 9x
1334 csqrtl NEW: ISO C 9x
1338 ctanhf NEW: ISO C 9x
1339 ctanhl NEW: ISO C 9x
1341 des_setparity NEW: Secure RPC
1342 ecb_crypt NEW: Secure RPC
1343 endutxent NEW: Unix98
1345 exp10f NEW: ISO C 9x
1346 exp10l NEW: ISO C 9x
1350 fattach NEW: STREAMS
1351 fdetach NEW: STREAMS
1355 feclearexcept NEW: ISO C 9x
1356 fegetenv NEW: ISO C 9x
1357 fegetexceptflag NEW: ISO C 9x
1358 fegetround NEW: ISO C 9x
1359 feholdexcept NEW: ISO C 9x
1361 feraiseexcept NEW: ISO C 9x
1362 ferror_locked REMOVED
1363 fesetenv NEW: ISO C 9x
1364 fesetexceptflag NEW: ISO C 9x
1365 fesetround NEW: ISO C 9x
1366 fetestexcept NEW: ISO C 9x
1367 feupdateenv NEW: ISO C 9x
1368 fflush_locked REMOVED
1372 fgets_unlocked NEW: GNU ext.
1373 fileno_locked REMOVED
1385 fputc_locked REMOVED
1386 fputs_unlocked NEW: GNU ext.
1387 fread_unlocked NEW: GNU ext.
1392 fstatvfs NEW: Unix98
1396 ftruncate64 NEW: LFS
1398 fwrite_unlocked NEW: GNU ext.
1399 gai_strerror NEW: IPv6
1403 getchar_locked REMOVED
1405 getdate_err NEW: Unix98
1406 getdate_r NEW: GNU ext.
1408 getnameinfo NEW: IPv6
1409 getnetname NEW: Secure RPC
1410 getpmsg NEW: STREAMS
1411 getpt NEW: Unix98 PTY
1412 getrlimit64 NEW: LFS
1413 getutxent NEW: Unix98
1414 getutxid NEW: Unix98
1415 getutxline NEW: Unix98
1416 glob64 NEW: GNU ext.
1417 globfree64 NEW: GNU ext.
1418 gnu_get_libc_release NEW: GNU ext.
1419 gnu_get_libc_version NEW: GNU ext.
1420 grantpt NEW: Unix98 PTY
1421 host2netname NEW: Secure RPC
1423 iconv_close NEW: iconv
1424 iconv_open NEW: iconv
1425 if_freenameindex NEW: IPv6
1426 if_indextoname NEW: IPv6
1427 if_nameindex NEW: IPv6
1428 if_nametoindex NEW: IPv6
1429 in6addr_any NEW: IPv6
1430 in6addr_loopback NEW: IPv6
1431 inet6_isipv4mapped NEW: IPv6
1432 isastream NEW: STREAMS
1433 iswblank NEW: GNU ext.
1434 key_decryptsession NEW: Secure RPC
1435 key_decryptsession_pk NEW: Secure RPC
1436 key_encryptsession NEW: Secure RPC
1437 key_encryptsession_pk NEW: Secure RPC
1438 key_gendes NEW: Secure RPC
1439 key_get_conv NEW: Secure RPC
1440 key_secretkey_is_set NEW: Secure RPC
1441 key_setnet NEW: Secure RPC
1442 key_setsecret NEW: Secure RPC
1443 llrint NEW: ISO C 9x
1444 llrintf NEW: ISO C 9x
1445 llrintl NEW: ISO C 9x
1446 llround NEW: ISO C 9x
1447 llroundf NEW: ISO C 9x
1448 llroundl NEW: ISO C 9x
1453 lrintf NEW: ISO C 9x
1454 lrintl NEW: ISO C 9x
1455 lround NEW: ISO C 9x
1456 lroundf NEW: ISO C 9x
1457 lroundl NEW: ISO C 9x
1459 makecontext NEW: Unix98
1460 mempcpy NEW: GNU ext.
1463 modify_ldt NEW: kernel
1467 nearbyint NEW: ISO C 9x
1468 nearbyintf NEW: ISO C 9x
1469 nearbyintl NEW: ISO C 9x
1470 netname2host NEW: Secure RPC
1471 netname2user NEW: Secure RPC
1472 nexttoward NEW: ISO C 9x
1473 nexttowardf NEW: ISO C 9x
1474 nexttowardl NEW: ISO C 9x
1478 passwd2des NEW: Secure RPC
1480 pow10f NEW: GNU ext.
1481 pow10l NEW: GNU ext.
1484 printf_size NEW: GNU ext.
1485 printf_size_info NEW: GNU ext.
1486 profil_counter REMOVED
1487 pthread_mutexattr_getkind_np REPLACED
1488 pthread_mutexattr_setkind_np REPLACED
1489 ptsname NEW: Unix98 PTY
1490 ptsname_r NEW: Unix98 PTY
1492 putchar_locked REMOVED
1493 putgrent NEW: GNU ext.
1495 putpmsg NEW: STREAMS
1496 pututxline NEW: Unix98
1500 readdir64_r NEW: LFS
1501 remquo NEW: ISO C 9x
1502 remquof NEW: ISO C 9x
1503 remquol NEW: ISO C 9x
1505 roundf NEW: ISO C 9x
1506 roundl NEW: ISO C 9x
1508 scalbln NEW: ISO C 9x
1509 scalblnf NEW: ISO C 9x
1510 scalblnl NEW: ISO C 9x
1512 sendfile NEW: kernel
1513 setcontext NEW: Unix98
1514 setrlimit64 NEW: LFS
1515 setutxent NEW: Unix98
1517 sigignore NEW: Unix98
1518 sigqueue NEW: POSIX.1b
1519 sigrelse NEW: Unix98
1520 sigset NEW: POSIX.1b
1521 sigtimedwait NEW: POSIX.1b
1522 sigwaitinfo NEW: POSIX.1b
1523 sincos NEW: GNU ext.
1524 sincosf NEW: GNU ext.
1525 sincosl NEW: GNU ext.
1529 strcasestr NEW: GNU ext.
1530 strtoimax NEW: ISO C 9x
1531 strtoumax NEW: ISO C 9x
1532 strverscmp NEW: GNU ext.
1533 svcauthdes_stats NEW: Secure RPC
1534 svcunix_create NEW: sunrpc etx
1535 svcunixfd_create NEW: sunrpc ext
1536 swapcontext NEW: Unix98
1537 tcgetsid NEW: Unix98 PTY
1538 tdestroy NEW: GNU ext.
1539 tgamma NEW: ISO C 9x
1540 tgammaf NEW: ISO C 9x
1541 tgammal NEW: ISO C 9x
1545 truncf NEW: ISO C 9x
1546 truncl NEW: ISO C 9x
1548 unlockpt NEW: Unix98 PTY
1549 updwtmpx NEW: Unix98
1550 user2netname NEW: Secure RPC
1551 utmpxname NEW: Unix98
1552 versionsort NEW: GNU ext.
1553 versionsort64 NEW: GNU ext.
1555 wcscasecmp NEW: GNU ext.
1556 wcsncasecmp NEW: GNU ext.
1557 wcsnlen NEW: GNU ext.
1558 wcstoimax NEW: ISO C 9x
1559 wcstoll NEW: ISO C 9x
1560 wcstoull NEW: ISO C 9x
1561 wcstoumax NEW: ISO C 9x
1563 wordexp NEW: POSIX.2
1564 wordfree NEW: POSIX.2
1565 write_profiling REMOVED
1566 xdecrypt NEW: Secure RPC
1567 xdr_authdes_cred NEW: Secure RPC
1568 xdr_authdes_verf NEW: Secure RPC
1569 xdr_cryptkeyarg NEW: Secure RPC
1570 xdr_cryptkeyarg2 NEW: Secure RPC
1571 xdr_cryptkeyres NEW: Secure RPC
1572 xdr_getcredres NEW: Secure RPC
1573 xdr_key_netstarg NEW: Secure RPC
1574 xdr_key_netstres NEW: Secure RPC
1575 xdr_keybuf NEW: Secure RPC
1576 xdr_keystatus NEW: Secure RPC
1577 xdr_netnamestr NEW: Secure RPC
1578 xdr_sizeof NEW: Secure RPC
1579 xdr_unixcred NEW: sunrpc ext
1580 xencrypt NEW: Secure RPC
1581 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1592 * inet_ntoa is thread-safe
1594 * updwtmp is moved from libutil to libc
1596 * rewrite of cbrt function
1598 * update of timezone data
1612 * add atoll function
1614 * fix complex problems in Berkeley DB code
1616 * fix math functions
1620 * fixed lots of header problems (especially Linux/GNU specific)
1622 * dynamic loader preserves all registers
1624 * Roland McGrath provided support for handling of auxiliary objects in
1625 the ELF dynamic loader.
1627 * support for parallel builds is improved
1631 * GNU extensions are no longer declared by default. To enable them you
1632 must define the macro `_GNU_SOURCE' in your program or compile with
1635 * The library has changed from using GNU ld symbol aliases to using weak
1636 symbols where available. The ELF object file format supports weak
1637 symbols; GNU ld also supports weak symbols in the a.out format. (There
1638 is also now support for other GNU ld extensions in ELF. Use the
1639 `--with-elf' option to configure to indicate you have ELF, and
1640 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1641 of many files which contained only symbol aliases, reducing the size of
1642 the source and the compiled library; many other files were renamed to
1643 less cryptic names previously occupied by the symbol alias files.
1644 There is a new header file <elf.h> for programs which operate on
1645 files in the ELF format.
1647 * Converted to Autoconf version 2, so `configure' has more options.
1648 Run `configure --help' to see the details.
1650 * The library can now be configured to build profiling, highly-optimized
1651 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1652 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1653 `configure' enable building these extra libraries. The shared library is
1654 built by default when using both ELF and GNU ld. When shared libraries
1655 are enabled, the new library `-ldl' is available for arbitrary run-time
1656 loading of shared objects; its interface is defined in <dlfcn.h>. The
1657 new header file <link.h> gives access to the internals of the run-time
1658 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1659 application of same name on other systems and it provides information
1660 about dynamically linked binaries.
1662 * The C library now provides the run-time support code for profiling
1663 executables compiled with `-pg'. Programs can control the profiling code
1664 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1665 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1666 the support for this file format was contributed by David Mosberger-Tang.
1668 * The math code has been replaced with a math library based on fdlibm from
1669 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1670 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1671 functions. The math functions now reside in a separate library, so
1672 programs using them will need to use `-lm' their linking commands.
1674 * John C. Bowman contributed optimized ix87 assembler inline functions.
1676 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1677 mechanism similar to that found in Solaris 2. This is now used for the
1678 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1679 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1680 file controls what services are used for each individual database. This
1681 works by loading shared libraries with names specified in `nsswitch.conf',
1682 so service modules can be changed or added at any time without even
1683 relinking any program. Currently there are the file, db, and NIS based
1684 NSS services available.
1686 * The new functions `strtoq' and `strtouq' parse integer values from
1687 strings, like `strtol' and `strtoul', but they return `long long int' and
1688 `unsigned long long int' values, respectively (64-bit quantities).
1690 * The new functions `strtof' and `strtold' parse floating-point values from
1691 strings, like `strtod', but they return `float' and `long double' values,
1692 respectively (on some machines `double' and `long double' are the same).
1694 * Ulrich Drepper has contributed new implementations of the floating-point
1695 printing and reading code used in the `printf' family of functions and
1696 `strtod', `strtof', and `strtold'. These new functions are perfectly
1697 accurate, and much faster than the old ones.
1699 * The implementation of the POSIX locale model was completely rewritten by
1700 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1701 to compile the POSIX locale definition.
1703 * The former dummy implementations of the strcoll and strxfrm function are
1704 now replaced by fully functional code contributed by Ulrich Drepper. The
1705 collation information comes from the POSIX locale definitions.
1707 * The new header <langinfo.h> defines an interface for accessing
1708 various locale-dependent data (using the locale chosen with `setlocale').
1710 * Ulrich Drepper has contributed a new suite of functions for operation on
1711 wide-character and multibyte-character strings, in <wchar.h>;
1712 and classification and case conversion of wide characters, in <wctype.h>.
1713 These new functions are conforming to the ISO C, Amendement 1 specification.
1715 * There is now a second implementation of the standard I/O library available.
1716 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1717 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1719 * You can now use positional parameter specifications in format strings
1720 for the `printf' and `scanf' families of functions. For example,
1721 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1722 ``Number 6, Mr Jones''. This is mainly useful when providing different
1723 format strings for different languages, whose grammars may dictate
1724 different orderings of the values being printed. To support this
1725 feature, the interface for `register_printf_handler' has changed; see
1726 the header file <printf.h> for details.
1728 * The `printf' and `scanf' families of functions now understand a new
1729 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1730 to group numbers as indicated by the locale; for `scanf' and friends, this
1731 says to accept as valid only a number with all the proper grouping
1732 separators in the right places. In the default "C" locale, numbers are
1733 not grouped; but locales for specific countries will define the usual
1734 conventions (i.e. separate thousands with `,' in the US locale).
1736 * The pgrp functions have been regularized, slightly incompatibly but much
1737 less confusingly. The core functions are now `getpgid' and `setpgid',
1738 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1739 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1740 provided for compatibility. There is no longer an incompatible `getpgrp'
1741 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1743 * The new header file <fts.h> and suite of functions simplify programs that
1744 operate on directory trees. This code comes from 4.4 BSD.
1746 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1747 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1748 NSS scheme used in glibc.
1750 * There is a new malloc debugging hook `__memalign_hook'.
1752 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1753 `unsigned int' in <sys/types.h>. These are for compatibility only and
1754 their use is discouraged.
1756 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1757 done differently, so that it works even without GNU ld.
1759 * New function `euidaccess' checks allowed access to a file like `access',
1760 but using the effective IDs instead of the real IDs.
1762 * The time zone data files have been updated for the latest and greatest
1763 local time conventions of the countries of the world.
1765 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1768 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1769 for formatting floating-point numbers. They are provided only for
1770 compatibility; new programs should use `sprintf' instead. There are
1771 also equivalent function for the `long double' floating-point type and
1772 all functions also exist in a reentrant form.
1774 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1775 functions for maintaining the login-record files (primarily of use to
1776 system programs such as `login'), and convenient functions for
1777 allocating and initializing a pseudo-terminal (pty) device.
1779 * Ulrich Drepper has contributed new support for System V style
1780 shared memory and IPC on systems that support it.
1782 * Ulrich Drepper has contributed several miscellaneous new functions found
1783 in System V: The `hsearch' family of functions provide an effective
1784 implementation of hash tables; `a64l' and `l64a' provide a very simple
1785 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1788 * Ulrich Drepper has contributed new reentrant counterparts for the
1789 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1791 * Ulrich Drepper has contributed new, highly-optimized versions of several
1792 string functions for the i486/Pentium family of processors.
1794 * Ulrich Drepper has updated the Linux-specific code, based largely
1795 on work done in Hongjiu Lu's version of GNU libc for Linux.
1796 The GNU library now supports Linux versions 2.0.10 and later,
1797 using the ELF object file format (i[3456]86-*-linux).
1799 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1801 * David Mosberger-Tang and Richard Henderson have ported the C library
1802 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1803 dynamic linking support for ELF/Alpha.
1805 * Richard Henderson contributed several Alpha optimized assembler function
1806 for arithmetic and string handling.
1808 * Ulrich Drepper has contributed a new set of message catalog functions to
1809 support multiple languages using the <libintl.h> interface, for use with
1810 his new package GNU gettext. Translation volunteers have contributed
1811 catalogs of the library's messages in Spanish, German, and Korean.
1813 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1814 program and the `catgets' function for reading the catalog files it
1815 creates. (The <libintl.h> interface is preferred; we include the
1816 <nl_types.h> interface using `catgets' only for source compatibility with
1817 programs already written to use it.)
1819 * New header file <values.h> gives SVID-compatible names for <limits.h>
1822 * Various new macros, declarations, and small header files for compatibility
1825 * New function `group_member' is a convenient way to check if a process has
1826 a given effective group ID.
1828 * When using GCC 2.7 and later, the socket functions are now declared in a
1829 special way so that passing an argument of type `struct sockaddr_in *',
1830 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1831 `struct sockaddr *' type, does not generate a type-clash warning.
1833 * New function `error' declared in header file <error.h> is a convenient
1834 function for printing error messages and optionally exiting; this is the
1835 canonical function used in GNU programs. The new functions `err', `warn',
1836 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1837 doing the same thing.
1839 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1840 POSIX.2 `glob' function to do ~ and {...} expansion.
1842 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1843 `clearenv' which is used in POSIX.9 is also available.
1845 * New function `getsid' returns session ID number on systems that support it.
1847 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1848 files <db.h> and <mpool.h> provide a rich set of functions for several
1849 types of simple databases stored in memory and in files, and <ndbm.h> is
1850 an old `ndbm'-compatible interface using the `db' functions. Link with
1851 `-ldb' to get these functions.
1853 * New macro `strdupa' copies a string like `strdup', but uses local stack
1854 space from `alloca' instead of dynamic heap space from `malloc'.
1856 * New function `strnlen' is like `strlen' but searches only a given maximum
1857 number of characters for the null terminator. `stpncpy', `strndup' and
1858 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1861 * New function `statfs' in header <sys/statfs.h>.
1863 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1864 provide convenient functions for operating on blocks of null-terminated
1867 * A new suite of functions in <utmp.h> handle all the details of reading
1868 and writing the utmp file.
1870 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1873 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1874 completely POSIX compliant and also implemented the extended functionality
1875 to handle alternate digit representation and alternate era date formats.
1877 * Ulrich Drepper provided an implementation of the `strptime' function
1878 defined in XPG4.2 which transforms a string into a `struct tm' value.
1880 * Paul Eggert provided the tzselect shell script as part of the timezone
1881 code. The shell script makes it easy to select the correct timezone
1884 * The implementation of the malloc family of functions is completely replaced
1885 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1886 The implementation uses the mmap function (if available) and it is
1887 optimized for the use in multi threaded programs.
1889 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1890 functions. This new functionality is usable by specifying a special
1891 salt string and it is compatible with implementation on *BSD systems.
1893 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1894 `getsubopt' to handle second level command line options, `bsd_signal'
1895 to access BSD style `signal' functionality, the obsolete `regexp' style
1898 * the `lchown' function is available on system which support this
1901 * The implementation of the shadow password handling function was contributed
1904 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1906 * POSIX.1g support was added. The <sys/select.h> header is available,
1907 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1908 implementation of `getaddrinfo'.
1912 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1914 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1915 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1917 * The new function `daemon' from 4.4 BSD is useful for server programs that
1918 want to put themselves in the background.
1920 * Joel Sherrill has contributed support for several standalone boards that
1921 run without an operating system.
1923 * `printf', `scanf' and friends now accept a `q' type modifier for long
1924 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1926 * All of the code taken from BSD (notably most of the math and networking
1927 routines) has been updated from the BSD 4.4-Lite release.
1929 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1931 * The new functions `getdomainname' and `setdomainname' fetch or change the
1932 YP/NIS domain name. These are system calls which exist on systems which
1935 * The time zone data files have been updated for the latest international
1938 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1939 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1943 * The C library now includes support for Sun RPC, from Sun's free
1944 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1945 are included. (There is still no support for YP.)
1947 * Tom Quinn has contributed a port of the C library to SGI machines running
1948 Irix 4 (mips-sgi-irix4).
1950 * The new `lockf' function is a simplified interface to the locking
1951 facilities of `fcntl', included for compatibility.
1953 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1955 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1957 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1960 * The error message printed by `assert' for a failed assertion now includes
1961 the name of the program (if using GNU ld) and the name of the calling
1962 function (with versions of GCC that support this).
1964 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1966 * The library now includes the <sys/mman.h> header file and memory
1967 management functions `mmap', `munmap', `mprotect', `msync', and
1968 `madvise', on systems that support those facilities.
1970 * The interface for `mcheck' has changed slightly: the function called to
1971 abort the program when an allocation inconsistency is detected now takes
1972 an argument that indicates the type of failure. The new function
1973 `mprobe' lets you request a consistency check for a particular block at
1974 any time (checks are normally done only when you call `free' or `realloc'
1977 * It is now possible to easily cross-compile the C library, building on one
1978 system a library to run on another machine and/or operating system. All
1979 you need to do is set the variable `HOST_CC' in `configparms' to the
1980 native compiler for programs to run on the machine you are building on (a
1981 few generator programs are used on Unix systems); set `CC' to the
1984 * The new function `fexecve' (only implemented on the GNU system) executes
1985 a program file given a file descriptor already open on the file.
1989 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1990 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1992 * You can set the variable `libprefix' in `configparms' to specify a prefix
1993 to be prepended to installed library files; this makes it easy to install
1994 the GNU C library to be linked as `-lgnuc' or whatever.
1996 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1997 copies a limited number of characters from a string, and returns the
1998 address of the last character written.
2000 * You no longer need to check for whether the installed `stddef.h' is
2001 compatible with the GNU C library. configure now checks for you.
2003 * You can now define a per-stream `fileno' function to convert the
2004 stream's cookie into an integral file descriptor.
2006 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2007 allocates zero bytes of storage, and returns a unique pointer which
2008 you can pass to `realloc' or `free'. The behavior is undefined if
2009 you dereference this pointer.
2011 * The C library now runs on Sony NEWS m68k machines running either
2012 NewsOS 3 or NewsOS 4.
2014 * The new `syscall' function is a system-dependent primitive function
2015 for invoking system calls. It has the canonical behavior on Unix
2016 systems, including unreliable return values for some calls (such as
2017 `pipe', `fork' and `getppid').
2019 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2020 to `EAGAIN', which is the preferred name. On systems whose kernels
2021 use two distinct codes, the C library now translates EWOULDBLOCK to
2022 EAGAIN in every system call function.
2026 * The GNU C Library Reference Manual is now distributed with the library.
2027 `make dvi' will produce a DVI file of the printed manual.
2028 `make info' will produce Info files that you can read on line using C-h i
2029 in Emacs or the `info' program.
2030 Please send comments on the manual to bug-glibc-manual@gnu.org.
2032 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2034 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2036 * Jason Merrill has contributed a port to the Sequent Symmetry running
2037 Dynix version 3 (i386-sequent-dynix).
2039 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2040 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2042 * New function `memory_warnings' lets you arrange to get warnings when
2043 malloc is running out of memory to allocate, like Emacs gives you.
2045 * The C library now contains the relocating allocator used in Emacs 19 for
2046 its editing buffers. This allocator (ralloc) minimizes allocation
2047 overhead and fragmentation by moving allocated regions around whenever it
2048 needs to. You always refer to a ralloc'd region with a "handle" (a
2049 pointer to a pointer--an object of type `void **').
2051 * There is a new `printf' format: `%m' gives you the string corresponding
2052 to the error code in `errno'.
2054 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2055 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2056 pass, the `a' modifier says to fill in a `char **' you pass with a
2059 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2060 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2061 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2063 * `mkstemp' is a traditional Unix function to atomically create and open a
2064 uniquely-named temporary file.
2068 * The standard location for the file that says what the local timezone is
2069 has changed again. It is now `/usr/local/etc/localtime' (or more
2070 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2072 * The distribution no longer contains any files with names longer than 14
2075 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2076 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2078 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2082 * The configuration process has changed quite a bit. The `configure'
2083 script is now used just like the configuration scripts for other GNU
2084 packages. The `sysdeps' directory hierarchy is much rearranged.
2085 The file `INSTALL' explains the new scheme in detail.
2087 * The header files no longer need to be processed into ANSI C and
2088 traditional C versions. There is just one set of files to install, and
2089 it will work with ANSI or old C compilers (including `gcc -traditional').
2091 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2092 MIPS DECStation running Ultrix 4.
2094 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2095 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2096 made itself into a shared library.
2098 * Yet further improved support for the i386, running 4.3 BSD-like systems
2099 (such as Mach 3 with the Unix single-server), or System V.
2101 * New function `strncasecmp' to do case-insensitive string comparison
2102 with limited length.
2104 * New function `strsep' is a reentrant alternative to `strtok'.
2106 * New functions `scandir' and `alphasort' for searching directories.
2108 * New function `setenv' is a better interface to `putenv'.
2110 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2111 function for traversing a directory tree.
2113 * The GNU obstack package is now also part of the C library.
2114 The new function `open_obstack_stream' creates a stdio stream that
2115 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2116 formatted output directly to an obstack.
2118 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2119 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2121 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2123 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2124 things to your strings.
2126 * There are some new test programs: test-fseek, testmb, and testrand.
2128 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2129 These ports are not finished, but are a good starting place for really
2130 supporting those systems.
2132 * `/etc/localtime' is now the standard location for the file that says what
2133 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2134 This follows the general principle that `/etc' is the place for all local
2135 configuration files.
2137 * The C library header files now use `extern "C"' when used by the C++
2138 compiler, so the C library should now work with C++ code.
2140 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2141 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2144 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2145 function which uses the `merge sort' algorithm, and is said to be
2146 significantly faster than the old GNU `qsort' function. Merge sort is
2147 now the standard `qsort' function. The new algorithm can require a lot
2148 of temporary storage; so, the old sorting function is called when the
2149 required storage is not available.
2151 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2152 provides the Unix `crypt' function, plus some other entry points.
2154 * The code and header files taken from 4.4 BSD have been updated with the
2155 latest files released from Berkeley.
2157 ----------------------------------------------------------------------
2158 Copyright information:
2160 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2162 Permission is granted to anyone to make or distribute verbatim copies
2163 of this document as received, in any medium, provided that the
2164 copyright notice and this permission notice are preserved,
2165 thus giving the recipient permission to redistribute in turn.
2167 Permission is granted to distribute modified versions
2168 of this document, or of portions of it,
2169 under the above conditions, provided also that they
2170 carry prominent notices stating who last changed them.
2173 version-control: never
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