1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 438, 4719, 6792, 13028, 13064, 14094, 14841, 14906, 14958, 15319, 15467,
13 15790, 15969, 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512,
14 16526, 16538, 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195,
15 17269, 17293, 17322, 17403, 17523, 17542, 17569, 17581, 17588, 17596,
16 17620, 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792,
17 17833, 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964,
18 17965, 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999,
19 18007, 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039,
20 18042, 18043, 18046, 18047, 18049, 18068, 18080, 18093, 18100, 18104,
21 18110, 18111, 18116, 18125, 18128, 18138, 18185, 18196, 18197, 18206,
22 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247,
23 18287, 18319, 18324, 18333, 18346, 18371, 18397, 18409, 18410, 18412,
24 18418, 18422, 18434, 18435, 18444, 18468, 18469, 18470, 18479, 18483,
25 18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, 18519,
26 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536,
27 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18558,
28 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612, 18613,
31 * Cache information can be queried via sysconf() function on s390 e.g. with
32 _SC_LEVEL1_ICACHE_SIZE as argument.
34 * A buffer overflow in gethostbyname_r and related functions performing DNS
35 requests has been fixed. If the NSS functions were called with a
36 misaligned buffer, the buffer length change due to pointer alignment was
37 not taken into account. This could result in application crashes or,
38 potentially arbitrary code execution, using crafted, but syntactically
39 valid DNS responses. (CVE-2015-1781)
41 * The time zone file parser has been made more robust against crafted time
42 zone files, avoiding heap buffer overflows related to the processing of
43 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
44 large time zone data files. Overly long time zone specifiers in the TZ
45 variable no longer result in stack overflows and crashes.
47 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
48 for LD and GD on x86 and x86-64, has been implemented. You will need
49 binutils-2.24 or later to enable this optimization.
51 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
52 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
53 Hat). These updates cause user visible changes, such as the fix for bug
56 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
57 and getXXbyYY NSS calls for the same database, causing a denial-of-service
58 condition in some applications.
60 * Added vector math library named libmvec with the following vectorized x86_64
61 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
63 The library can be disabled with --disable-mathvec. Use of the functions is
64 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
65 Shared library libmvec.so is linked in as needed when using -lm (no need to
66 specify -lmvec explicitly for not static builds).
67 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
71 * The following bugs are resolved with this release:
73 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
74 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
75 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
76 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
77 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
78 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
79 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
80 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
81 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
82 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
85 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
86 too little memory for the to-be-scanned arguments and overflow the
87 allocated buffer. The implementation now correctly computes the required
88 buffer size when using malloc, and switches to malloc from alloca as
91 * A new semaphore algorithm has been implemented in generic C code for all
92 machines. Previous custom assembly implementations of semaphore were
93 difficult to reason about or ensure that they were safe. The new version
94 of semaphore supports machines with 64-bit or 32-bit atomic operations.
95 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
96 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
98 * Port to Altera Nios II has been contributed by Mentor Graphics.
100 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
101 implementations for powerpc64/powerpc64le.
102 Implemented by Adhemerval Zanella (IBM).
104 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
105 and powerpc64le. This may improve lock scaling of existing programs on
106 HTM capable systems. The lock elision code is only enabled with
107 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
108 powerpc will issue a transaction abort on every syscall to avoid side
109 effects being visible outside transactions.
111 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
112 AArch64. Contributed by ARM Ltd.
114 * i386 memcpy functions optimized with SSE2 unaligned load/store.
116 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
117 under certain input conditions resulting in the execution of a shell for
118 command substitution when the application did not request it. The
119 implementation now checks WRDE_NOCMD immediately before executing the
120 shell and returns the error WRDE_CMDSUB as expected.
122 * CVE-2012-3406 printf-style functions could run into a stack overflow when
123 processing format strings with a large number of format specifiers.
125 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
126 infinite loop if the DNS response contained a PTR record of an unexpected
129 * The minimum GCC version that can be used to build this version of the GNU
130 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
131 still be used to compile programs using the GNU C Library.
133 * The GNU C Library is now built with -Werror by default. This can be
134 disabled by configuring with --disable-werror.
136 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
138 * The obsolete sigvec function has been removed. This was the original
139 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
140 programs have been using instead for about 25 years. Of course, ABI
141 compatibility for old binaries using sigvec remains intact.
143 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
144 with newer versions of bison.
146 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
147 The original MIPS o32 hard-float ABI requires an FPU where double-precision
148 registers overlay two consecutive single-precision registers. MIPS32R2
149 introduced a new FPU mode (FR=1) where double-precision registers extend the
150 corresponding single-precision registers which is incompatible with the
151 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
152 require the use of FR=1 making a transition necessary. New o32 ABI
153 extensions enable users to migrate over time from the original o32 ABI
154 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
155 tracks the ABI of any loaded object and verifies that new objects are
156 compatible. Mode transitions will also be requested as required and
157 unsupportable objects will be rejected. The ABI checks include both soft and
158 hard float ABIs for o32, n32 and n64.
160 GCC 5 with GNU binutils 2.25 onwards:
161 It is strongly recommended that all o32 system libraries are built using the
162 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
163 with the original and all new o32 ABI extensions. Configure a MIPS GCC
164 compiler using --with-fp-32=xx to set this by default.
168 * The following bugs are resolved with this release:
170 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
171 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
172 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
173 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
174 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
175 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
176 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
177 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
178 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
179 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
180 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
181 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
182 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
183 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
184 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
186 * Reverted change of ABI data structures for s390 and s390x:
187 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
188 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
189 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
190 are preserved pointing straight to the same implementation as the old ones.
191 Given that, new callers will simply provide a too-big buffer to these
192 functions. Any applications/libraries out there that embed jmp_buf or
193 ucontext_t in an ABI-relevant data structure that have already been rebuilt
194 against 2.19 headers will have to rebuilt again. This is necessary in any
195 case to revert the breakage in their ABI caused by the glibc change.
197 * Support for file description locks is added to systems running the
198 Linux kernel. The standard file locking interfaces are extended to
199 operate on file descriptions, not file descriptors, via the use of
200 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
201 are associated with an open file instead of a process.
203 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
205 * The minimum Linux kernel version that this version of the GNU C Library
206 can be used with is 2.6.32.
208 * Running the testsuite no longer terminates as soon as a test fails.
209 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
210 with PASS or FAIL lines for individual tests. A summary of the results is
211 printed, including a list of failing lists, and "make check" exits with
212 error status if there were any unexpected failures. "make check
213 stop-on-test-failure=y" may be used to keep the old behavior.
215 * The am33 port, which had not worked for several years, has been removed
218 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
219 supported; they now act the same as _DEFAULT_SOURCE (but generate a
220 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
221 conflicted with POSIX (support for which was removed in 2.19), the
222 interfaces those macros enabled remain available when compiling with
223 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
226 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
228 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
229 This may improve lock scaling of existing programs on TX capable systems.
230 The lock elision code is only built with --enable-lock-elision=yes and
231 then requires a GCC version supporting the TX builtins. With lock elision
232 default mutexes are elided via __builtin_tbegin, if the cpu supports
233 transactions. By default lock elision is not enabled and the elision code
236 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
237 copy the path argument. This allowed programs to cause posix_spawn to
238 deference a dangling pointer, or use an unexpected pathname argument if
239 the string was modified after the posix_spawn_file_actions_addopen
242 * All supported architectures now use the main glibc sysdeps directory
243 instead of some being in a separate "ports" directory (which was
244 distributed separately before glibc 2.17).
246 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
247 On configurations that support it (all Linux configurations), it's now
248 used regardless of the --enable-add-ons switch to configure. It is no
249 longer possible to build such configurations without pthreads support.
251 * Locale names, including those obtained from environment variables (LANG
252 and the LC_* variables), are more tightly checked for proper syntax.
253 setlocale will now fail (with EINVAL) for locale names that are overly
254 long, contain slashes without starting with a slash, or contain ".." path
255 components. (CVE-2014-0475) Previously, some valid locale names were
256 silently replaced with the "C" locale when running in AT_SECURE mode
257 (e.g., in a SUID program). This is no longer necessary because of the
260 * On x86-64, the dynamic linker's lazy-binding support is now compatible
261 with application code using Intel MPX instructions. (With all previous
262 versions, the MPX register state could be clobbered when making calls
263 into or out of a shared library.) Note that while the new dynamic
264 linker is compatible with all known x86 hardware whether or not it
265 supports Intel MPX, some x86 instruction-set emulators might fail to
266 handle the new instruction encodings. This is known to affect Valgrind
267 versions up through 3.9 (but will be fixed in the forthcoming 3.10
268 release), and might affect other tools that do instruction emulation.
270 * Support for loadable gconv transliteration modules has been removed.
271 The support for transliteration modules has been non-functional for
272 over a decade, and the removal is prompted by security defects. The
273 normal gconv conversion modules are still supported. Transliteration
274 with //TRANSLIT is still possible, and the //IGNORE specifier
275 continues to be supported. (CVE-2014-5119)
277 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
278 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
279 resulting a denial-of-service security vulnerability in applications which
280 use functions related to iconv. (CVE-2014-6040)
284 * The following bugs are resolved with this release:
286 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
287 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
288 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
289 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
290 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
291 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
292 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
293 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
294 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
295 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
296 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
297 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
298 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
299 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
300 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
301 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
302 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
303 16431, 16453, 16474, 16506, 16510, 16529
305 * Slovenian translations for glibc messages have been contributed by the
306 Translation Project's Slovenian team of translators.
308 * The public headers no longer use __unused nor __block. This change is to
309 support compiling programs that are derived from BSD sources and use
310 __unused internally, and to support compiling with Clang's -fblock
311 extension which uses __block.
313 * CVE-2012-4412 The strcoll implementation caches indices and rules for
314 large collation sequences to optimize multiple passes. This cache
315 computation may overflow for large collation sequences and may cause a
316 stack or buffer overflow. This is now fixed to use a slower algorithm
317 which does not use a cache if there is an integer overflow.
319 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
320 rules for large collation sequences to optimize multiple passes and falls
321 back to alloca if malloc fails, resulting in a possible stack overflow.
322 The implementation now falls back to an uncached collation sequence lookup
325 * CVE-2013-4788 The pointer guard used for pointer mangling was not
326 initialized for static applications resulting in the security feature
327 being disabled. The pointer guard is now correctly initialized to a
328 random value for static applications. Existing static applications need
329 to be recompiled to take advantage of the fix (bug 15754).
331 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
332 to the d_name member of struct dirent, or omit the terminating NUL
333 character. (Bugzilla #14699).
335 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
336 aligned_alloc functions could allocate too few bytes or corrupt the
337 heap when passed very large allocation size values (Bugzilla #15855,
340 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
341 for AF_INET6 has been fixed (Bugzilla #16072).
343 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
344 pap_CW, quz_PE, the_NP.
346 * Substantially revised locales: gd_GB, ht_HT
348 * The LC_ADDRESS field was updated to support country_car for almost all
351 * ISO 1427 definitions were updated.
353 * ISO 3166 definitions were updated.
355 * The localedef utility now supports --big-endian and --little-endian
356 command-line options to generate locales for a different system from that
357 for which the C library was built.
359 * Binary locale files now only depend on the endianness of the system for
360 which they are generated and not on other properties of that system. As a
361 consequence, binary files generated with new localedef may be incompatible
362 with old versions of the GNU C Library, and binary files generated with
363 old localedef may be incompatible with this version of the GNU C Library,
364 in the following circumstances:
366 + Locale files may be incompatible on m68k systems.
368 + Locale archive files (but not separate files for individual locales) may
369 be incompatible on systems where plain "char" is signed.
371 * The configure option --disable-versioning has been removed. Builds with
372 --disable-versioning had not worked for several years.
374 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
375 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
377 * SystemTap probes for malloc have been introduced.
379 * SystemTap probes for slow multiple precision fallback paths of
380 transcendental functions have been introduced.
382 * Support for powerpc64le has been added.
384 * The soft-float powerpc port now supports e500 processors.
386 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
388 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
389 set of header declarations that are enabled by default, even when other
390 feature test macros or compiler options such as -std=c99 would otherwise
391 disable some of those declarations.
393 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
394 conflict with POSIX. The libbsd-compat library (which was a dummy library
395 that did nothing) has also been removed.
397 * Preliminary documentation about Multi-Thread, Async-Signal and
398 Async-Cancel Safety has been added.
400 * Change of ABI data structures for s390 and s390x:
401 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
402 allow for future hardware extensions. All library functions that accept or
403 return these structures were versioned in order to provide backwards
404 compatibility with existing code. However, not all cases can be handled
405 with interface versioning. If an application embeds either structure into
406 another structure and that structure is passed to another compilation unit
407 which expects the newer larger-sized object then any access to the new
408 fields will result in undefined behaviour. Similarly any access to fields
409 that were moved by the enlarging of the structures will cause undefined
410 behaviour. To fix the undefined behaviour all objects that are part of the
411 final in-memory image must agree on the size of structures, and this may
412 require recompilation.
416 * The following bugs are resolved with this release:
418 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
419 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
420 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
421 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
422 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
423 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
424 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
425 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
426 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
427 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
428 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
429 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
430 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
433 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
434 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
435 Distributions can re-enable building and using pt_chown via the new configure
436 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
437 considerable security risks and should only be used if the distribution
438 understands and accepts the risks.
440 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
443 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
444 fixed (Bugzilla #15330).
446 * Add support for calling C++11 thread_local object destructors on thread
447 and program exit. This needs compiler support for offloading C++11
448 destructor calls to glibc.
450 * Improved worst case performance of libm functions with double inputs and
453 * Support for priority inherited mutexes in pthread condition variables on
454 non-x86 architectures.
456 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
458 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
460 * Optimized string functions for ARM. Implemented by Will Newton and
463 * Optimized libm functions for SPARC. Implemented by David S. Miller.
465 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
468 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
469 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
471 * Added a benchmark framework to track performance of functions in glibc.
473 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
474 It is based on draft TS 18661 and currently enabled as a GNU extension.
476 * On Linux, the clock function now uses the clock_gettime system call
477 for improved precision, rather than old times system call.
479 * Added support for version-3 tz format files. This is needed when using
480 the tz database release 2013e or later, and affects a few unusual cases --
481 currently only TZ='America/Godthab' for time stamps after 2037.
483 * Added new API functions pthread_getattr_default_np and
484 pthread_setattr_default_np to get and set the default pthread
485 attributes of a process.
487 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
488 This may improve lock scaling of existing programs on TSX capable systems.
489 When the --enable-lock-elision=yes parameter is specified at configure
490 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
493 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
494 availability). Implemented by Ryan S. Arnold.
496 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
500 * The following bugs are resolved with this release:
502 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
503 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
504 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
505 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
506 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
507 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
508 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
509 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
510 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
511 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
512 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
513 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
514 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
515 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
516 14879, 14889, 14893, 14898, 14914.
518 * Optimization of memcpy for MIPS.
520 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
521 EMFILE has been fixed (Bugzilla #14889).
523 * The add-on ports collection is now distributed in the "ports" subdirectory
524 of the main GNU C Library distribution, rather than separately.
526 * Port to ARM AArch64 contributed by Linaro.
528 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
529 Optimized versions of memcpy, memset, and memcmp added for System z10 and
531 Implemented by Andreas Krebbel.
533 * The new function secure_getenv allows secure access to the environment,
534 returning NULL if running in a SUID/SGID process. This function replaces
535 the internal function __secure_getenv.
537 * SystemTap static probes have been added into the dynamic linker.
538 Implemented by Gary Benson.
540 * Optimizations of string functions strstr, strcasestr and memmem.
541 Implemented by Maxim Kuvyrkov.
543 * The minimum Linux kernel version that this version of the GNU C Library
544 can be used with is 2.6.16.
546 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
547 powerpc POWER7. Implemented by Will Schmidt.
549 * New configure option --disable-nscd builds the C library such that it
550 never attempts to contact the Name Service Caching Daemon (nscd).
551 New configure option --disable-build-nscd avoids building nscd itself;
552 this is the default if --disable-nscd is used.
554 * Improved support for cross-compilation, including cross-testing and
555 bootstrap builds without a previously built glibc.
557 * Several testsuite tests are now able to test multiple IFUNC variants of an
558 interface, rather than just testing the one that would be chooen by
561 * New configure options --with-bugurl and --with-pkgversion, for
562 distributors to use to embed their bug-reporting and package version
563 information in --help and --version output.
565 * The ttyname and ttyname_r functions on Linux now fall back to searching for
566 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
567 allows creation of chroots without the procfs mounted on /proc.
569 * The `crypt' function now fails if passed salt bytes that violate the
570 specification for those values. On Linux, the `crypt' function will
571 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
572 enabled, and fail on encrypted strings using the MD5 or DES algorithm
573 when the mode is enabled.
575 * The `clock_*' suite of functions (declared in <time.h>) is now available
576 directly in the main C library. Previously it was necessary to link with
577 -lrt to use these functions. This change has the effect that a
578 single-threaded program that uses a function such as `clock_gettime' (and
579 is not linked with -lrt) will no longer implicitly load the pthreads
580 library at runtime and so will not suffer the overheads associated with
581 multi-thread support in other code such as the C++ runtime library.
583 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
588 * The following bugs are resolved with this release:
590 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
591 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
592 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
593 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
594 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
595 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
596 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
597 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
598 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
599 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
600 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
601 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
602 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
603 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
604 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
605 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
606 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
607 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
608 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
609 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
610 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
611 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
614 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
615 configuring glibc with:
616 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
617 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
618 Implemented by H.J. Lu.
622 + define static_assert
624 + do not declare gets
626 + declare at_quick_exit and quick_exit also for ISO C11
628 + aligned_alloc. NB: The code is deliberately allows the size parameter
629 to not be a multiple of the alignment. This is a moronic requirement
630 in the standard but it is only a requirement on the caller, not the
635 + uchar.h support added
637 + CMPLX, CMPLXF, CMPLXL added
639 Implemented by Ulrich Drepper.
641 * Support for the IA-64 has been moved to ports.
643 * Remove support for anything but ELF binary format
645 * Checking versions of poll, ppoll added.
646 Implemented by Ulrich Drepper.
648 * More generic and 64-bit performance optimizations to math functions.
649 Implemented by Ulrich Drepper.
651 * New configure option --enable-obsolete-rpc makes the deprecated RPC
652 headers and functions available at compile time as they were before
653 version 2.14. This option will be removed at some time in the future
654 after the TI-RPC library becomes fully sufficient for the needs of
655 existing applications.
657 * Compatibility code for Linux kernel versions before 2.4 has been removed.
658 Note that glibc is not expected to work with any Linux kernel version
661 * New header <sys/auxv.h> and function getauxval allowing easy access to
662 the AT_* key-value pairs passed from the Linux kernel. The header also
663 defines the HWCAP_* bits associated with the AT_HWCAP key.
665 * New locales: mag_IN
667 * New configure option --enable-systemtap builds SystemTap static probes
668 into libc for setjmp and longjmp and into libpthread for various operations.
669 So far the setjmp/longjmp probes and some of the libpthread probes are
670 provided only for i*86 and x86_64.
671 Implemented by Roland McGrath and Rayson Ho.
673 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
675 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
678 * More optimized functions for SPARC. Implemented by David S. Miller.
680 * Improved support for cross-compilation, especially bootstrap builds
681 without a previously built glibc.
683 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
684 Chris Metcalf from Tilera.
686 * Support for the old ARM ABI has been removed from ports. Only the EABI is
687 now supported for ARM processors.
689 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
690 as the name of the dynamic linker, to distinguish it from the
691 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
693 * Support for CRIS has been removed from ports.
695 * A new class of installed header has been documented for low-level
696 platform-specific functionality. PowerPC added the first instance with a
697 function to provide time base register access. Contributed by Tulio
698 Magno Quites Machado Filho.
700 * ix86 configurations now install header files that are consistent with
701 what x86-64 configurations install. These same header files can be used
702 for -m32, -m64, or -mx32 builds.
703 Contributed by H.J. Lu.
705 * Math library bug fixes. A thorough audit of all open math library bugs was
706 conducted by Joseph Myers. Significant progress was made on many math
707 library bugs resulting in more accurate exceptions and function results.
708 Many thanks to all those that contributed including Andreas Jaeger for his
709 patch review and work on the x87 trigonometric instruction issues.
711 * Timezone data is no longer installed. Timezone-related binaries and scripts
712 will continue to be installed. Users should obtain their timezone data from
713 their distribution provider or from the tzdata package at
714 <ftp://munnari.oz.au/pub/>.
718 * The following bugs are resolved with this release:
720 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
721 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
722 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
723 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
724 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
725 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
726 13484, 13506, 13515, 13523, 13524, 13538, 13540
728 * New program pldd to list loaded object of a process
729 Implemented by Ulrich Drepper.
731 * Add nss_db support back to glibc. No more dependency on Berkeley db
732 and support for initgroups lookups.
733 Implemented by Ulrich Drepper.
735 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
736 Contributed by HJ Lu.
738 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
739 Contributed by HJ Lu.
741 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
742 on x86-32 and x86-64.
743 Contributed by Liubov Dmitrieva.
745 * Optimized strchr and strrchr for SSE on x86-32.
746 Contributed by Liubov Dmitrieva.
748 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
749 for x86-64 and x86-32.
750 Contributed by Liubov Dmitrieva.
752 * New interfaces: scandirat, scandirat64
753 Implemented by Ulrich Drepper.
755 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
756 Implemented by Ulrich Drepper.
758 * nscd now also caches the netgroup database.
759 Implemented by Ulrich Drepper.
761 * Integrate libm with gcc's -ffinite-math-only option.
762 Implemented by Ulrich Drepper.
764 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
765 to math functions. Implemented by Ulrich Drepper.
767 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
768 Implemented by Ulrich Drepper.
770 * New Linux interfaces: process_vm_readv, process_vm_writev
772 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
773 Implemented by Ulrich Drepper.
775 * Optimized nearbyint and strcasecmp for PPC.
776 Implemented by Adhemerval Zanella.
778 * New locales: bho_IN, unm_US, es_CU, ta_LK
782 * The following bugs are resolved with this release:
784 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
785 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
786 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
787 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
788 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
789 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
790 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
791 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
792 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
793 12795, 12811, 12813, 12814, 12841
795 * The RPC implementation in libc is obsoleted. Old programs keep working
796 but new programs cannot be linked with the routines in libc anymore.
797 Programs in need of RPC functionality must be linked against TI-RPC.
798 The TI-RPC implementation is IPv6 enabled and there are other benefits.
800 Visible changes of this change include (obviously) the inability to link
801 programs using RPC functions without referencing the TI-RPC library and the
802 removal of the RPC headers from the glibc headers.
803 Implemented by Ulrich Drepper.
805 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
806 syncfs, setns, sendmmsg
808 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
809 yue_HK, lij_IT, mhr_RU
811 * New encodings: CP770, CP771, CP772, CP773, CP774
813 * New program sotruss to trace calls through PLTs
814 Implemented by Ulrich Drepper.
816 * The malloc hook implementation is marked deprecated and will be removed
817 from the default implementation in the next version. The design never
818 worked ever since the introduction of threads. Even programs which do
819 not create threads themselves can use multiple threads created internally.
823 * The following bugs are resolved with this release:
825 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
826 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
827 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
828 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
831 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
833 * POWER7 optimizations: memset, memcmp, strncmp
835 * New optimized string functions for x86-64: strnlen (SSE2),
836 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
837 Implemented by Ulrich Drepper.
841 * The following bugs are resolved with this release:
843 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
844 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
845 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
846 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
847 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
848 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
849 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
850 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
852 * New interfaces: pthread_getname_np, pthread_setname_np
854 * New Linux interface: recvmmsg
856 * STT_GNU_IFUNC implemented for Sparc by David Miller.
858 * The dynamic linker now recognizes supported ABI versions from the
859 EI_ABIVERSION field in the ELF header.
860 Implemented by Ulrich Drepper.
862 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
863 will not be used to fill in password fields in the passwd.byname replies.
864 Instead it is used to synthesize the shadow.byname table, should it be
865 missing. This is a useful mode in some installations involving Solaris.
866 Implemented by Ulrich Drepper.
868 * New locales: kok_IN, sq_MK, cv_RU
872 * The following bugs are resolved with this release:
874 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
875 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
876 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
877 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
878 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
879 10789, 10817, 10823, 10840, 10847
881 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
883 Implemented by Ulrich Drepper.
885 * Checking version of longjmp added that fails if an uninitialized stack
886 frame would be created. Implemented by Ulrich Drepper.
888 * STT_GNU_IFUNC is now supported in static executables.
889 Implemented by H.J. Lu.
891 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
893 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
894 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
895 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
896 Contributed by H.J. Lu.
898 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
899 Implemented by Ulrich Drepper.
901 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
903 Contributed by H.J. Lu.
905 * Support for fma instruction in AVX on x86-64.
906 Implemented by H.J. Lu and Ulrich Drepper.
908 * AVX support in x86-64 auditing support in ld.so.
909 Implemented by H.J. Lu.
911 * STB_GNU_UNIQUE support added.
912 Implemented by Ulrich Drepper.
914 * Implement second fallback mode for optimized DNS lookup for even more
915 broken environments. If two requests from the same port are not
916 handled correctly close the socket and open a new one before sending
917 the second request. The 'single-request-reopen' option in /etc/resolv.conf
918 can be used to select this mode right away, instead of rediscovering the
919 necessity is every process again.
920 Implemented by Ulrich Drepper.
922 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
923 Implemented by Adam Tkac.
925 * Optimized iconv conversions for S390x.
926 Implemented by Andreas Krebbel.
928 * Using condvars with PI mutexes is now more efficient due to kernel
929 support for requeueing to PI futexes. NPTL support added for x86-64.
930 Implemented by Ulrich Drepper.
932 * New locales: ps_AF, my_MM
936 * The following bugs are resolved with this release:
938 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
939 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
940 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
941 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
942 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
944 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
945 Implemented by Ulrich Drepper.
947 * New Linux interfaces: accept4, fallocate, fallocate64.
948 Implemented by Ulrich Drepper.
950 * Correct declarations of string function when used in C++ code. This
951 could lead to compile errors for invalid C++ code.
953 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
956 * New POSIX 2008 interface: psiginfo
957 Implemented by Ulrich Drepper.
959 * New ISO C++1x interfaces: quick_exit, at_quick_exit
960 Implemented by Ulrich Drepper.
962 * Support for selecting between multiple function definitions at runtime
963 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
965 * The libcrypt library can now use the hash function implementations in
966 NSS. Implemented by Ulrich Drepper.
968 * The malloc implementation can be compiled to be less memory efficient
969 but higher performing in multi-threaded programs.
970 Implemented by Ulrich Drepper.
972 * New locales: nan_TW@latin, ks_IN
974 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
975 Implemented by Ulrich Drepper.
977 * Extended printf hook support. It is possible to use user-defined types
978 and extend existing format specifiers.
979 Implemented by Ulrich Drepper.
981 * Handling for group shadow files has been added.
982 Implemented by Ulrich Drepper.
984 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
985 servers (the case, e.g., for some people using the built-in DNS
986 server in ADSL modems/routers). There is a once-per-process timeout
987 in case of a broken server. To avoid it, users can run nscd or put
988 'options single-request' in /etc/resolv.conf.
989 Implemented by Ulrich Drepper.
993 * The following bugs are resolved with this release:
995 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
996 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
997 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
998 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
999 6968, 6974, 6980, 6995, 7008, 7009, 7029
1001 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1002 up at the same time. Implemented by Ulrich Drepper.
1004 * TLS descriptors for LD and GD on x86 and x86-64.
1005 Implemented by Alexandre Oliva.
1007 * getaddrinfo now handles DCCP and UDPlite.
1008 Implemented by Ulrich Drepper.
1010 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1011 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1012 Implemented by Ulrich Drepper.
1014 * New implementation of memmem, strstr, and strcasestr which is O(n).
1015 Implemented by Eric Blake.
1017 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1019 * Implement "e" option for popen to open file descriptor with the
1020 close-on-exec flag set. Implemented by Ulrich Drepper.
1022 * Implement "b" mode for fmemopen. In this mode writes writes don't
1023 implicitly add a NUL byte and seeks from the end of the buffer really
1024 use the buffer end, not the string length as the basis.
1025 Implemented by Ulrich Drepper.
1027 * Many functions, exported and internal, now atomically set the close-on-exec
1028 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1030 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1032 Implemented by Pravin Satpute.
1034 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1038 * The following bugs are resolved with this release:
1040 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1041 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1042 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1043 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1044 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1045 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1046 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1048 * New locales: bo_CN, bo_IN, shs_CA.
1050 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1052 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1053 Implemented by Pravin Satpute.
1055 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1057 * nscd caches now all timeouts for DNS entries
1058 Implemented by Ulrich Drepper.
1060 * nscd is more efficient and wakes up less often.
1061 Implemented by Ulrich Drepper.
1063 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1064 vdprintf, and obstack_vprintf.
1065 Implemented by Jakub Jelinek.
1067 * Faster memset for x86-64.
1068 Implemented by Harsha Jagasia and H.J. Lu.
1070 * Faster memcpy on x86.
1071 Implemented by Ulrich Drepper.
1073 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1074 Implemented by Ulrich Drepper.
1076 * Faster sqrt and sqrtf implemention for some PPC variants.
1077 Implemented by Steven Munroe.
1081 * The following bugs are resolved with this release:
1083 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1084 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1085 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1086 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1087 5071, 5103, 5104, 5112, 5113, 5184, 5186
1089 * More checking functions: fread, fread_unlocked, open*, mq_open.
1090 Implemented by Jakub Jelinek and Ulrich Drepper.
1092 * Extend fortification to C++. Implemented by Jakub Jelinek.
1094 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1095 by not recognizing 'a' as a modifier when those specs are requested.
1096 Implemented by Jakub Jelinek.
1098 * PPC optimizations to math and string functions.
1099 Implemented by Steven Munroe.
1101 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1102 options to be passed. Implemented by Ulrich Drepper.
1104 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1106 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1107 Implemented by Ulrich Drepper.
1109 * Handle private futexes in the NPTL implementation.
1110 Implemented by Jakub Jelinek and Ulrich Drepper.
1112 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1113 Implemented by Roland McGrath and Ulrich Drepper.
1115 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1117 * SHA-256 and SHA-512 based password encryption.
1118 Implemented by Ulrich Drepper.
1120 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1121 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1124 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1125 Implemented by Ulrich Drepper.
1129 * The following bugs are resolved with this release:
1131 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1132 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1133 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1134 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1135 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1136 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1137 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1140 * New Linux interfaces: epoll_pwait, sched_getcpu.
1142 * New generic interfaces: strerror_l.
1144 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1148 * The following bugs are resolved with this release:
1150 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1151 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1152 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1153 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1154 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1155 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1156 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1157 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1158 3225, 3251, 3252, 3253, 3273
1160 * For Linux, the sorting of addresses returned by getaddrinfo now also
1161 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1162 Implemented by Ulrich Drepper.
1164 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1165 Implemented by Ulrich Drepper.
1167 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1169 * New iconv module for MIK. Contributed by Alexander Shopov.
1171 * For sites with broken group and/or passwd database, the auto-propagate
1172 option of nscd can prevent creating ID lookup entries from the results
1173 of a name lookup and vice versa. This usually is no problem but some
1174 site might have problems with the default behavior.
1175 Implemented by Ulrich Drepper.
1177 * Iterating over entire database in NIS can be slow. With the
1178 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1179 to trade time for memory. The entire database will be read at once.
1180 Implemented by Ulrich Drepper.
1182 * The interfaces introduced in RFC 3542 have been implemented by
1185 * Support for the new ELF hash table format was added by Ulrich Drepper.
1187 * Support for priority inheritance mutexes added by Jakub Jelinek and
1190 * Support for priority protected mutexes added by Jakub Jelinek.
1192 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1193 or_IN, csb_PL, fy_NL, sr_ME.
1197 * More overflow detection functions.
1199 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1200 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1202 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1203 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1204 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1205 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1206 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1207 by Masahide Washizawa.
1209 * It is now possible to install audit libraries for the dynamic linker using
1210 LD_AUDIT. Implemented by Ulrich Drepper.
1212 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1213 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1214 For a libc and libpthread that works well on Linux 2.4 kernels, we
1215 recommend using the stable 2.3 branch.
1217 * The new function open_wmemstream acts like open_memstream,
1218 but uses a wchar_t wide character buffer.
1220 * The new function ppoll is an improved version of poll, similar to pselect.
1222 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1223 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1224 renameat, unlinkat, linkat, symlinkat, readlinkat.
1226 * New Linux kernel system calls: unshare,
1227 inotify_init, inotify_add_watch, inotify_rm_watch.
1229 * The euidaccess function is now also known by the alias eaccess,
1230 for compatibility with some other systems.
1232 * Timezone data updated to 2006b version.
1236 * The following bugs are resolved with this release:
1238 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1239 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1240 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1241 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1242 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1243 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1245 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1247 * As of this release, GCC 4 can be used to compile the C Library.
1249 * Timezone data updated to 2005m version.
1253 * The following bugs are resolved with this release:
1255 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1256 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1257 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1258 777, 787, 821, 822, 823, 825
1260 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1264 * Support for RFC 3678. Real implementations exist only for Linux so far.
1265 Implemented by Ulrich Drepper.
1267 * nscd can now cache entries persistently. Expiring entries are reloaded.
1268 For speedups the cache can be shared in memory with client processes.
1269 Implemented by Ulrich Drepper.
1271 * nscd can now perform SELinux checks.
1272 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1274 * getaddrinfo queries are now cached. Canonical name lookup is performed
1276 Implemented by Ulrich Drepper.
1278 * The nothrow function attribute is used when headers are used by gcc when
1279 compiling C code. This can avoid significant amounts of exception
1282 * The malloc functions perform more error checking and are stricter when
1283 it comes to reacting on errors. The default action is to terminate
1284 the process after showing an error message. Implemented by Ulrich Drepper.
1286 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1287 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1289 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1290 namespaces using the new function dlmopen(). This feature is of course,
1291 like most other dynamic loading functionality, not available in statically
1292 linked applications. Implemented by Ulrich Drepper.
1294 * Low-overhead boundary checking variants of string and some stdio functions
1295 were added. These are to be used in conjunction with a gcc patch by
1296 Jakub Jelinek which adds calls to these functions if possible.
1297 Implemented by Jakub Jelinek and Ulrich Drepper.
1299 * Old code for several operating systems and machine architectures that
1300 have not been in working condition in a long time have been removed from
1301 the main source tree maintained by the GNU C Library's maintainers.
1302 These files are now reside in the separate `ports' source module
1303 that is usable as an add-on when building the library.
1307 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1308 interrogate the dynamic linker, compatible with the Solaris interface.
1310 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1311 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1313 * getifaddrs now uses the netlink interface on Linux to get its information.
1314 Implemented by Thorsten Kukuk.
1316 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1317 Implemented by Ulrich Drepper.
1319 * support for non-executable stacks on x86 has been added. Changes mostly
1322 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1325 * getaddrinfo now performs destination address selection according to
1330 * Thread-safe interfaces for many functions that access locale data
1331 were added in version 2.3, but these features were omitted from NEWS.
1332 Many functions have variants with an `_l' suffix that take a `locale_t'
1333 object as a parameter rather than consulting the current locale.
1334 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1335 create and maintain `locale_t' objects. Additionally, the new function
1336 `uselocale' sets "the current locale" (as used by functions not so
1337 parameterized) set for an individual thread. These features were added
1338 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1340 * The functions getresuid, getresgid, setresuid, and setresgid, which
1341 have long been available on Linux, are now declared in <unistd.h>
1342 and are now also available on the Hurd.
1344 * ELF thread-local storage support (TLS) now works on x86-64.
1346 * The new dynamic string token $LIB is expanded in shared library names.
1347 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1349 * Aldy Hernandez contributed complete software floating point support for
1350 PowerPC machines with no FPU.
1352 * fexecve is implemented on Linux.
1354 * The `btowc' function should work at least twice as fast due to
1355 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1357 * With approriate thread add-ons cancelable functions are now implemented
1358 in libc.so as well. No need to call the function in libpthread. This
1359 change allowed to finally disable the incorrect and expensive handling
1360 of weak definition in ld.so.
1362 * Yet more PLT entries in libc.so have been removed. We finally arrived
1363 at the bare minimum. Startup times improved appropriately.
1365 * Support for the new Linux/x86 system call interface was added. The
1366 AT_SYSINFO auxiliary vector entry is recognized and handled.
1370 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1373 * iconv (the program and the interface) now accepts empty names (excluding
1374 options like //TRANSLIT) to mean "use charset of current locale".
1376 * localedef can now transliterate characters in strings which are not in
1377 the provided charmap. The information from the input locale is used.
1379 * Prelinking support was added for ELF targets. This requires additional
1380 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1382 * Read-only stdio streams now use mmap to speed up operation by eliminating
1383 copying and buffer underflows. To use add 'm' to the mode string of
1384 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1386 * The malloc functions were completely rewritten by Wolfram Gloger based
1387 on Doug Lea's malloc-2.7.0.c.
1389 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1390 implementation of regex.
1392 * Bruno Haible upgraded the iconv and locale implementation to support
1395 * Contents of the LC_* and LANG environment variables in the CEN style are
1396 not recognized anymore. It never was used. Change by Ulrich Drepper.
1398 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1399 thread-local storage (TLS) ABI on some platforms.
1400 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1402 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1403 EUC-JISX0213, and TSCII.
1405 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1406 BSD-compatible interface for getting all network interface addresses.
1407 Implementation for IPv4 by Roland McGrath.
1409 * Loading of locale data is faster due to the introduction of a locale
1410 archive. Implemented by Roland McGrath and Ulrich Drepper.
1412 * Startup times are significantly reduced by not using exported functions
1413 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1416 * Steven Munroe contributed a port to PowerPC64/Linux.
1420 * The Hurd now uses the GNU libio implementation of stdio rather than the
1421 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1423 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1424 with the same behavior as the Linux system call of the same name.
1428 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1429 128-bit long double format.
1431 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1432 IBM1161, and IBM1162 charsets.
1434 * Andreas Jaeger contributed a port to x86-64/Linux.
1436 * Peter Bruin contributed a port to PowerPC/Hurd.
1438 * libc functions using I/O streams now can handle wide-oriented streams
1441 * optimizations in the dynamic linker. Binaries created by recent binutils
1442 versions start up quicker due to reduced time spent on relocations.
1444 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1448 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1449 asinh, atanh, j0 for the 128-bit long double format.
1451 * Bruno Haible updated all the code handling Unicode in some form to
1452 support Unicode 3.1.
1454 * Speed of regex for single-byte locales is back to previous levels.
1455 Patch by Isamu Hasegawa.
1457 * Alpha, SPARC, and IA-64 now also using floating stacks.
1459 * Startup time of internationalized applications greatly improved through
1460 iconv cache. Use iconvconfig to generate the cache file.
1461 Contributed by Ulrich Drepper.
1463 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1464 severe performance problems. Patch by David Mosberger.
1466 * The Hurd port got a lot more functionality like AIO, various stdio
1467 extensions, etc. Mainly done by Roland McGrath.
1469 * mtrace can now lookup symbols in shared libraries.
1473 * Intel's IA-64 math library is largely integrated. It provides fast and
1474 accurate implementatations for most basic and standard math functions
1475 in float, double, and long double format.
1477 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1478 and asin for the 96-bit long double format and asin, log, tan for the
1479 128-bit long double format.
1481 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1482 The basic double functions exist today. Contributed by Abraham Ziv
1483 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1484 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1486 * An asynchronous name lookup library was added. The interface is designed
1487 after POSIX AIO. The proposal was circulated beforehand to get comments.
1488 No negative ones came in. Implemented by Ulrich Drepper.
1490 * Port to S390/64bit contributed by Martin Schwidefsky
1491 <schwidefsky@de.ibm.com>.
1493 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1494 of functions for Linux/IA-64.
1496 * The RPC code is now thread safe. Threads can now use the same service
1497 of different services at the same time. Patch by Eric Norum
1498 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1500 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1501 family of functions for Linux/S390.
1503 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1504 of functions for Linux/x86.
1506 * Port to Linux/CRIS contributed by Axis Communications.
1510 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1511 we can now check for namespace violations and missing declarations. The
1512 result is that almost all headers are now Unix-compliant (as defined in
1513 the upcoming XPG6). The negative side is that some programs might need
1514 corrections, too, if they depend on the incorrect form of the headers in
1515 previous versions which defined too many symbols and included too many
1518 * regex now handles multibyte character sets correctly.
1519 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1521 * iconv (the program) does now conform to the upcoming XPG6 and handles
1522 charmaps. Instead of the charset names the path of charmaps can be
1523 provided and the conversion happens based on this data.
1524 Contributed by Ulrich Drepper.
1526 * The locale program now provides detailed information about the installed
1531 only lists the names of the supported locales
1535 provides details such as country, language, and codeset name.
1536 Contributed by Ulrich Drepper.
1540 * The gencat program now parses the input file according to the charset
1541 selected by the LC_CTYPE category. This is important for stateful
1542 character sets. To make generating catalogs easier there is a way
1543 to overwrite the charset selected by the locale: before the first
1544 message or $ quote line the catalog can contain a line like
1546 $ codeset=ISO-8859-2
1548 to select the charset (ISO-8859-2 in this case).
1550 Implemented by Shinya Hanataka and Ulrich Drepper.
1552 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1553 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1554 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1556 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1557 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1559 * The LANGUAGE environment variable is now ignored unless the locale is
1560 changed from the default "C" locale.
1562 * The usual bug fixes.
1566 * Greg McGary added runtime support for bounds checking using gcc's
1567 new -fbounded-pointers option. ix86 target is complete. PowerPC
1570 * Thorsten Kukuk added secure mode support to nscd.
1572 * The Berkeley db libraries have been removed.
1574 Related, the nss_db module is now in a separate package since it
1575 obviously requires a database library being available.
1577 * Wide character I/O streams implemented by Ulrich Drepper.
1579 * Functions from the extended socket API added by Ulrich Drepper.
1581 * Functions feenableexcept and fedisableexcept to control the
1582 behaviour of individual exceptions have been added by Andreas Jaeger.
1584 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1586 * The resolver code has been updated from bind 8.2.3-T5B which supports
1587 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1590 This change could in some situations effect backward compatibility. Since
1591 now `_res' is a thread-local instead of a global variable, modifying it
1592 in one thread does not have any effect in other threads.
1594 The resolver library was also extended to allow IPv6 as the transport
1595 protocol for the requests. This work was done by Stig Venaas.
1597 * Compatibility code for K&R C compilers has been removed from the
1598 header files. A ISO C compiler is needed to use the library
1599 (conforming to either C89 or C99 standard).
1601 * Complete rewrite of the localedef program to support multibyte character
1602 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1603 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1604 Implemented by Ulrich Drepper.
1606 Bruno Haible significantly improved the generation and use of the data
1607 structures for the wide character tables.
1609 * Plural handling in gettext implemented by Ulrich Drepper.
1611 * The utmp daemon has been removed.
1613 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1615 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1618 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1620 * POSIX barriers implemented by Kaz Kylheku.
1622 * POSIX spawn function family implemented by Ulrich Drepper.
1624 * POSIX spinlocks are now available.
1626 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1628 * the configure option --enable-kernel=X.Y.Z allows to strip out
1629 compatibility for kernel versions before X.Y.Z. This is currently only
1630 implemented for Linux.
1632 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1633 field sin6_scope_id. This means that all programs using IPv6 should be
1634 recompiled. Don't expect binary compatibility with previous glibc
1637 * various conversion modules for IBM character sets contributed by
1640 * IA-64 port by Jes Sorensen and HJ Lu.
1654 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1656 * New xdr functions are added; some rpc functions are now 64bit clean.
1658 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1660 * Fixed known incompatibilities with glibc 2.0.
1662 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1664 * Optimized a number of functions (especially the ELF dynamic loader).
1666 * Update timezone data files.
1668 * lots of charmaps corrections
1670 * some new locale definitions and charmaps
1675 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1676 conform to POSIX member type requirements. Symbol versions have been
1677 adjusted as needed within the library, and for direct use by applications,
1678 but there is potential for problems if third-party libraries use
1679 struct timeval as part of their interface. This does not present
1680 a problem for X and other "essential" system libraries.
1682 * An additional locale model to support C++ Standard Library locale
1683 model and probably more was implemented by Ulrich Drepper.
1685 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1688 * Miles Bader provided the `argp' function family to support hierachical
1689 command line argument parsing, layered on top of getopt.
1691 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1693 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1696 * scanf recognizes the %a and %A format for scanning floating point numbers.
1698 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1699 information and interfaces for the available integer types.
1701 * about 130 new math functions were added to implement the ISO C9x math
1704 * the new header <complex.h> contains definitions of the complex math
1705 functions from ISO C 9X.
1707 * the new header <tgmath.h> defines generic macros to use complex or
1708 real valued functions.
1710 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1712 * Andreas Jaeger provided a test suite for the math library.
1714 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1716 * Ulrich Drepper added character set conversion functions (iconv).
1718 * Optimized string functions have been added.
1720 * The localedata addon is now part of glibc.
1722 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1724 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1725 daemon for NSS (nscd).
1727 Missing a better place here are some numbers on improvements. Under
1728 Linux 2.1.125 un-tar-ing the kernel sources takes
1732 using local files 12.19s 6.88s 22.91s
1734 using NIS 13.92s 8.91s 26.34s
1736 using NIS & nscd 10.37s 7.34s 25.30s
1738 using NIS+ 27.57s 30.37s 640.46s
1740 using NIS+ & nscd 10.25s 7.83s 26.51s
1742 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1744 Keep in mind that non-namelookup related operations dominate above times.
1745 It was just a common complain that using NIS+ unpacking the kernel is
1748 [1] The old nscd implementation is not available anymore since it was
1749 distributed with glibc up to version 2.0.98 and thus is now replaced.
1751 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1753 * Mark Kettenis provided a Hesiod NSS module.
1755 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1756 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1758 * rcmd can now handle netgroups (Dick Streefland).
1760 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1763 * Support for the IPv6 protocol has been added to the socket API, as per the
1764 latest draft standards.
1766 * Support for Linux 2.2 has been added.
1768 * Interface changes relative to the latest 2.0.x release:
1769 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1770 addseverity NEW: Unix98
1771 alphasort64 NEW: LFS
1772 argp_err_exit_status NEW: argp, GNU ext
1773 argp_error NEW: argp, GNU ext
1774 argp_failure NEW: argp, GNU ext
1775 argp_help NEW: argp, GNU ext
1776 argp_parse NEW: argp, GNU ext
1777 argp_program_bug_address NEW: argp, GNU ext
1778 argp_program_version NEW: argp, GNU ext
1779 argp_program_version_hook NEW: argp, GNU ext
1780 argp_state_help NEW: argp, GNU ext
1781 argp_usage NEW: argp, GNU ext
1782 authdes_create NEW: Secure RPC
1783 authdes_getucred NEW: Secure RPC
1784 authdes_pk_create NEW: Secure RPC
1785 backtrace NEW: GNU ext.
1786 backtrace_symbols NEW: GNU ext.
1787 backtrace_symbols_fd NEW: GNU ext.
1789 cacosf NEW: ISO C 9x
1790 cacosh NEW: ISO C 9x
1791 cacoshf NEW: ISO C 9x
1792 cacoshl NEW: ISO C 9x
1793 cacosl NEW: ISO C 9x
1800 casinf NEW: ISO C 9x
1801 casinh NEW: ISO C 9x
1802 casinhf NEW: ISO C 9x
1803 casinhl NEW: ISO C 9x
1804 casinl NEW: ISO C 9x
1806 catanf NEW: ISO C 9x
1807 catanh NEW: ISO C 9x
1808 catanhf NEW: ISO C 9x
1809 catanhl NEW: ISO C 9x
1810 catanl NEW: ISO C 9x
1811 cbc_crypt NEW: Secure RPC
1815 ccoshf NEW: ISO C 9x
1816 ccoshl NEW: ISO C 9x
1822 cimagf NEW: ISO C 9x
1823 cimagl NEW: ISO C 9x
1824 clearerr_locked REMOVED
1825 clntunix_create NEW: sunrpc ext
1827 clog10 NEW: ISO C 9x
1828 clog10f NEW: ISO C 9x
1829 clog10l NEW: ISO C 9x
1839 cprojf NEW: ISO C 9x
1840 cprojl NEW: ISO C 9x
1842 crealf NEW: ISO C 9x
1843 creall NEW: ISO C 9x
1848 csinhf NEW: ISO C 9x
1849 csinhl NEW: ISO C 9x
1852 csqrtf NEW: ISO C 9x
1853 csqrtl NEW: ISO C 9x
1857 ctanhf NEW: ISO C 9x
1858 ctanhl NEW: ISO C 9x
1860 des_setparity NEW: Secure RPC
1861 ecb_crypt NEW: Secure RPC
1862 endutxent NEW: Unix98
1864 exp10f NEW: ISO C 9x
1865 exp10l NEW: ISO C 9x
1869 fattach NEW: STREAMS
1870 fdetach NEW: STREAMS
1874 feclearexcept NEW: ISO C 9x
1875 fegetenv NEW: ISO C 9x
1876 fegetexceptflag NEW: ISO C 9x
1877 fegetround NEW: ISO C 9x
1878 feholdexcept NEW: ISO C 9x
1880 feraiseexcept NEW: ISO C 9x
1881 ferror_locked REMOVED
1882 fesetenv NEW: ISO C 9x
1883 fesetexceptflag NEW: ISO C 9x
1884 fesetround NEW: ISO C 9x
1885 fetestexcept NEW: ISO C 9x
1886 feupdateenv NEW: ISO C 9x
1887 fflush_locked REMOVED
1891 fgets_unlocked NEW: GNU ext.
1892 fileno_locked REMOVED
1904 fputc_locked REMOVED
1905 fputs_unlocked NEW: GNU ext.
1906 fread_unlocked NEW: GNU ext.
1911 fstatvfs NEW: Unix98
1915 ftruncate64 NEW: LFS
1917 fwrite_unlocked NEW: GNU ext.
1918 gai_strerror NEW: IPv6
1922 getchar_locked REMOVED
1924 getdate_err NEW: Unix98
1925 getdate_r NEW: GNU ext.
1927 getnameinfo NEW: IPv6
1928 getnetname NEW: Secure RPC
1929 getpmsg NEW: STREAMS
1930 getpt NEW: Unix98 PTY
1931 getrlimit64 NEW: LFS
1932 getutxent NEW: Unix98
1933 getutxid NEW: Unix98
1934 getutxline NEW: Unix98
1935 glob64 NEW: GNU ext.
1936 globfree64 NEW: GNU ext.
1937 gnu_get_libc_release NEW: GNU ext.
1938 gnu_get_libc_version NEW: GNU ext.
1939 grantpt NEW: Unix98 PTY
1940 host2netname NEW: Secure RPC
1942 iconv_close NEW: iconv
1943 iconv_open NEW: iconv
1944 if_freenameindex NEW: IPv6
1945 if_indextoname NEW: IPv6
1946 if_nameindex NEW: IPv6
1947 if_nametoindex NEW: IPv6
1948 in6addr_any NEW: IPv6
1949 in6addr_loopback NEW: IPv6
1950 inet6_isipv4mapped NEW: IPv6
1951 isastream NEW: STREAMS
1952 iswblank NEW: GNU ext.
1953 key_decryptsession NEW: Secure RPC
1954 key_decryptsession_pk NEW: Secure RPC
1955 key_encryptsession NEW: Secure RPC
1956 key_encryptsession_pk NEW: Secure RPC
1957 key_gendes NEW: Secure RPC
1958 key_get_conv NEW: Secure RPC
1959 key_secretkey_is_set NEW: Secure RPC
1960 key_setnet NEW: Secure RPC
1961 key_setsecret NEW: Secure RPC
1962 llrint NEW: ISO C 9x
1963 llrintf NEW: ISO C 9x
1964 llrintl NEW: ISO C 9x
1965 llround NEW: ISO C 9x
1966 llroundf NEW: ISO C 9x
1967 llroundl NEW: ISO C 9x
1972 lrintf NEW: ISO C 9x
1973 lrintl NEW: ISO C 9x
1974 lround NEW: ISO C 9x
1975 lroundf NEW: ISO C 9x
1976 lroundl NEW: ISO C 9x
1978 makecontext NEW: Unix98
1979 mempcpy NEW: GNU ext.
1982 modify_ldt NEW: kernel
1986 nearbyint NEW: ISO C 9x
1987 nearbyintf NEW: ISO C 9x
1988 nearbyintl NEW: ISO C 9x
1989 netname2host NEW: Secure RPC
1990 netname2user NEW: Secure RPC
1991 nexttoward NEW: ISO C 9x
1992 nexttowardf NEW: ISO C 9x
1993 nexttowardl NEW: ISO C 9x
1997 passwd2des NEW: Secure RPC
1999 pow10f NEW: GNU ext.
2000 pow10l NEW: GNU ext.
2003 printf_size NEW: GNU ext.
2004 printf_size_info NEW: GNU ext.
2005 profil_counter REMOVED
2006 pthread_mutexattr_getkind_np REPLACED
2007 pthread_mutexattr_setkind_np REPLACED
2008 ptsname NEW: Unix98 PTY
2009 ptsname_r NEW: Unix98 PTY
2011 putchar_locked REMOVED
2012 putgrent NEW: GNU ext.
2014 putpmsg NEW: STREAMS
2015 pututxline NEW: Unix98
2019 readdir64_r NEW: LFS
2020 remquo NEW: ISO C 9x
2021 remquof NEW: ISO C 9x
2022 remquol NEW: ISO C 9x
2024 roundf NEW: ISO C 9x
2025 roundl NEW: ISO C 9x
2027 scalbln NEW: ISO C 9x
2028 scalblnf NEW: ISO C 9x
2029 scalblnl NEW: ISO C 9x
2031 sendfile NEW: kernel
2032 setcontext NEW: Unix98
2033 setrlimit64 NEW: LFS
2034 setutxent NEW: Unix98
2036 sigignore NEW: Unix98
2037 sigqueue NEW: POSIX.1b
2038 sigrelse NEW: Unix98
2039 sigset NEW: POSIX.1b
2040 sigtimedwait NEW: POSIX.1b
2041 sigwaitinfo NEW: POSIX.1b
2042 sincos NEW: GNU ext.
2043 sincosf NEW: GNU ext.
2044 sincosl NEW: GNU ext.
2048 strcasestr NEW: GNU ext.
2049 strtoimax NEW: ISO C 9x
2050 strtoumax NEW: ISO C 9x
2051 strverscmp NEW: GNU ext.
2052 svcauthdes_stats NEW: Secure RPC
2053 svcunix_create NEW: sunrpc etx
2054 svcunixfd_create NEW: sunrpc ext
2055 swapcontext NEW: Unix98
2056 tcgetsid NEW: Unix98 PTY
2057 tdestroy NEW: GNU ext.
2058 tgamma NEW: ISO C 9x
2059 tgammaf NEW: ISO C 9x
2060 tgammal NEW: ISO C 9x
2064 truncf NEW: ISO C 9x
2065 truncl NEW: ISO C 9x
2067 unlockpt NEW: Unix98 PTY
2068 updwtmpx NEW: Unix98
2069 user2netname NEW: Secure RPC
2070 utmpxname NEW: Unix98
2071 versionsort NEW: GNU ext.
2072 versionsort64 NEW: GNU ext.
2074 wcscasecmp NEW: GNU ext.
2075 wcsncasecmp NEW: GNU ext.
2076 wcsnlen NEW: GNU ext.
2077 wcstoimax NEW: ISO C 9x
2078 wcstoll NEW: ISO C 9x
2079 wcstoull NEW: ISO C 9x
2080 wcstoumax NEW: ISO C 9x
2082 wordexp NEW: POSIX.2
2083 wordfree NEW: POSIX.2
2084 write_profiling REMOVED
2085 xdecrypt NEW: Secure RPC
2086 xdr_authdes_cred NEW: Secure RPC
2087 xdr_authdes_verf NEW: Secure RPC
2088 xdr_cryptkeyarg NEW: Secure RPC
2089 xdr_cryptkeyarg2 NEW: Secure RPC
2090 xdr_cryptkeyres NEW: Secure RPC
2091 xdr_getcredres NEW: Secure RPC
2092 xdr_key_netstarg NEW: Secure RPC
2093 xdr_key_netstres NEW: Secure RPC
2094 xdr_keybuf NEW: Secure RPC
2095 xdr_keystatus NEW: Secure RPC
2096 xdr_netnamestr NEW: Secure RPC
2097 xdr_sizeof NEW: Secure RPC
2098 xdr_unixcred NEW: sunrpc ext
2099 xencrypt NEW: Secure RPC
2100 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2111 * inet_ntoa is thread-safe
2113 * updwtmp is moved from libutil to libc
2115 * rewrite of cbrt function
2117 * update of timezone data
2131 * add atoll function
2133 * fix complex problems in Berkeley DB code
2135 * fix math functions
2139 * fixed lots of header problems (especially Linux/GNU specific)
2141 * dynamic loader preserves all registers
2143 * Roland McGrath provided support for handling of auxiliary objects in
2144 the ELF dynamic loader.
2146 * support for parallel builds is improved
2150 * GNU extensions are no longer declared by default. To enable them you
2151 must define the macro `_GNU_SOURCE' in your program or compile with
2154 * The library has changed from using GNU ld symbol aliases to using weak
2155 symbols where available. The ELF object file format supports weak
2156 symbols; GNU ld also supports weak symbols in the a.out format. (There
2157 is also now support for other GNU ld extensions in ELF. Use the
2158 `--with-elf' option to configure to indicate you have ELF, and
2159 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2160 of many files which contained only symbol aliases, reducing the size of
2161 the source and the compiled library; many other files were renamed to
2162 less cryptic names previously occupied by the symbol alias files.
2163 There is a new header file <elf.h> for programs which operate on
2164 files in the ELF format.
2166 * Converted to Autoconf version 2, so `configure' has more options.
2167 Run `configure --help' to see the details.
2169 * The library can now be configured to build profiling, highly-optimized
2170 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2171 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2172 `configure' enable building these extra libraries. The shared library is
2173 built by default when using both ELF and GNU ld. When shared libraries
2174 are enabled, the new library `-ldl' is available for arbitrary run-time
2175 loading of shared objects; its interface is defined in <dlfcn.h>. The
2176 new header file <link.h> gives access to the internals of the run-time
2177 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2178 application of same name on other systems and it provides information
2179 about dynamically linked binaries.
2181 * The C library now provides the run-time support code for profiling
2182 executables compiled with `-pg'. Programs can control the profiling code
2183 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2184 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2185 the support for this file format was contributed by David Mosberger-Tang.
2187 * The math code has been replaced with a math library based on fdlibm from
2188 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2189 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2190 functions. The math functions now reside in a separate library, so
2191 programs using them will need to use `-lm' their linking commands.
2193 * John C. Bowman contributed optimized ix87 assembler inline functions.
2195 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2196 mechanism similar to that found in Solaris 2. This is now used for the
2197 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2198 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2199 file controls what services are used for each individual database. This
2200 works by loading shared libraries with names specified in `nsswitch.conf',
2201 so service modules can be changed or added at any time without even
2202 relinking any program. Currently there are the file, db, and NIS based
2203 NSS services available.
2205 * The new functions `strtoq' and `strtouq' parse integer values from
2206 strings, like `strtol' and `strtoul', but they return `long long int' and
2207 `unsigned long long int' values, respectively (64-bit quantities).
2209 * The new functions `strtof' and `strtold' parse floating-point values from
2210 strings, like `strtod', but they return `float' and `long double' values,
2211 respectively (on some machines `double' and `long double' are the same).
2213 * Ulrich Drepper has contributed new implementations of the floating-point
2214 printing and reading code used in the `printf' family of functions and
2215 `strtod', `strtof', and `strtold'. These new functions are perfectly
2216 accurate, and much faster than the old ones.
2218 * The implementation of the POSIX locale model was completely rewritten by
2219 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2220 to compile the POSIX locale definition.
2222 * The former dummy implementations of the strcoll and strxfrm function are
2223 now replaced by fully functional code contributed by Ulrich Drepper. The
2224 collation information comes from the POSIX locale definitions.
2226 * The new header <langinfo.h> defines an interface for accessing
2227 various locale-dependent data (using the locale chosen with `setlocale').
2229 * Ulrich Drepper has contributed a new suite of functions for operation on
2230 wide-character and multibyte-character strings, in <wchar.h>;
2231 and classification and case conversion of wide characters, in <wctype.h>.
2232 These new functions are conforming to the ISO C, Amendement 1 specification.
2234 * There is now a second implementation of the standard I/O library available.
2235 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2236 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2238 * You can now use positional parameter specifications in format strings
2239 for the `printf' and `scanf' families of functions. For example,
2240 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2241 ``Number 6, Mr Jones''. This is mainly useful when providing different
2242 format strings for different languages, whose grammars may dictate
2243 different orderings of the values being printed. To support this
2244 feature, the interface for `register_printf_handler' has changed; see
2245 the header file <printf.h> for details.
2247 * The `printf' and `scanf' families of functions now understand a new
2248 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2249 to group numbers as indicated by the locale; for `scanf' and friends, this
2250 says to accept as valid only a number with all the proper grouping
2251 separators in the right places. In the default "C" locale, numbers are
2252 not grouped; but locales for specific countries will define the usual
2253 conventions (i.e. separate thousands with `,' in the US locale).
2255 * The pgrp functions have been regularized, slightly incompatibly but much
2256 less confusingly. The core functions are now `getpgid' and `setpgid',
2257 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2258 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2259 provided for compatibility. There is no longer an incompatible `getpgrp'
2260 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2262 * The new header file <fts.h> and suite of functions simplify programs that
2263 operate on directory trees. This code comes from 4.4 BSD.
2265 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2266 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2267 NSS scheme used in glibc.
2269 * There is a new malloc debugging hook `__memalign_hook'.
2271 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2272 `unsigned int' in <sys/types.h>. These are for compatibility only and
2273 their use is discouraged.
2275 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2276 done differently, so that it works even without GNU ld.
2278 * New function `euidaccess' checks allowed access to a file like `access',
2279 but using the effective IDs instead of the real IDs.
2281 * The time zone data files have been updated for the latest and greatest
2282 local time conventions of the countries of the world.
2284 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2287 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2288 for formatting floating-point numbers. They are provided only for
2289 compatibility; new programs should use `sprintf' instead. There are
2290 also equivalent function for the `long double' floating-point type and
2291 all functions also exist in a reentrant form.
2293 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2294 functions for maintaining the login-record files (primarily of use to
2295 system programs such as `login'), and convenient functions for
2296 allocating and initializing a pseudo-terminal (pty) device.
2298 * Ulrich Drepper has contributed new support for System V style
2299 shared memory and IPC on systems that support it.
2301 * Ulrich Drepper has contributed several miscellaneous new functions found
2302 in System V: The `hsearch' family of functions provide an effective
2303 implementation of hash tables; `a64l' and `l64a' provide a very simple
2304 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2307 * Ulrich Drepper has contributed new reentrant counterparts for the
2308 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2310 * Ulrich Drepper has contributed new, highly-optimized versions of several
2311 string functions for the i486/Pentium family of processors.
2313 * Ulrich Drepper has updated the Linux-specific code, based largely
2314 on work done in Hongjiu Lu's version of GNU libc for Linux.
2315 The GNU library now supports Linux versions 2.0.10 and later,
2316 using the ELF object file format (i[3456]86-*-linux).
2318 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2320 * David Mosberger-Tang and Richard Henderson have ported the C library
2321 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2322 dynamic linking support for ELF/Alpha.
2324 * Richard Henderson contributed several Alpha optimized assembler function
2325 for arithmetic and string handling.
2327 * Ulrich Drepper has contributed a new set of message catalog functions to
2328 support multiple languages using the <libintl.h> interface, for use with
2329 his new package GNU gettext. Translation volunteers have contributed
2330 catalogs of the library's messages in Spanish, German, and Korean.
2332 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2333 program and the `catgets' function for reading the catalog files it
2334 creates. (The <libintl.h> interface is preferred; we include the
2335 <nl_types.h> interface using `catgets' only for source compatibility with
2336 programs already written to use it.)
2338 * New header file <values.h> gives SVID-compatible names for <limits.h>
2341 * Various new macros, declarations, and small header files for compatibility
2344 * New function `group_member' is a convenient way to check if a process has
2345 a given effective group ID.
2347 * When using GCC 2.7 and later, the socket functions are now declared in a
2348 special way so that passing an argument of type `struct sockaddr_in *',
2349 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2350 `struct sockaddr *' type, does not generate a type-clash warning.
2352 * New function `error' declared in header file <error.h> is a convenient
2353 function for printing error messages and optionally exiting; this is the
2354 canonical function used in GNU programs. The new functions `err', `warn',
2355 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2356 doing the same thing.
2358 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2359 POSIX.2 `glob' function to do ~ and {...} expansion.
2361 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2362 `clearenv' which is used in POSIX.9 is also available.
2364 * New function `getsid' returns session ID number on systems that support it.
2366 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2367 files <db.h> and <mpool.h> provide a rich set of functions for several
2368 types of simple databases stored in memory and in files, and <ndbm.h> is
2369 an old `ndbm'-compatible interface using the `db' functions. Link with
2370 `-ldb' to get these functions.
2372 * New macro `strdupa' copies a string like `strdup', but uses local stack
2373 space from `alloca' instead of dynamic heap space from `malloc'.
2375 * New function `strnlen' is like `strlen' but searches only a given maximum
2376 number of characters for the null terminator. `stpncpy', `strndup' and
2377 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2380 * New function `statfs' in header <sys/statfs.h>.
2382 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2383 provide convenient functions for operating on blocks of null-terminated
2386 * A new suite of functions in <utmp.h> handle all the details of reading
2387 and writing the utmp file.
2389 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2392 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2393 completely POSIX compliant and also implemented the extended functionality
2394 to handle alternate digit representation and alternate era date formats.
2396 * Ulrich Drepper provided an implementation of the `strptime' function
2397 defined in XPG4.2 which transforms a string into a `struct tm' value.
2399 * Paul Eggert provided the tzselect shell script as part of the timezone
2400 code. The shell script makes it easy to select the correct timezone
2403 * The implementation of the malloc family of functions is completely replaced
2404 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2405 The implementation uses the mmap function (if available) and it is
2406 optimized for the use in multi threaded programs.
2408 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2409 functions. This new functionality is usable by specifying a special
2410 salt string and it is compatible with implementation on *BSD systems.
2412 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2413 `getsubopt' to handle second level command line options, `bsd_signal'
2414 to access BSD style `signal' functionality, the obsolete `regexp' style
2417 * the `lchown' function is available on system which support this
2420 * The implementation of the shadow password handling function was contributed
2423 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2425 * POSIX.1g support was added. The <sys/select.h> header is available,
2426 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2427 implementation of `getaddrinfo'.
2431 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2433 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2434 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2436 * The new function `daemon' from 4.4 BSD is useful for server programs that
2437 want to put themselves in the background.
2439 * Joel Sherrill has contributed support for several standalone boards that
2440 run without an operating system.
2442 * `printf', `scanf' and friends now accept a `q' type modifier for long
2443 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2445 * All of the code taken from BSD (notably most of the math and networking
2446 routines) has been updated from the BSD 4.4-Lite release.
2448 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2450 * The new functions `getdomainname' and `setdomainname' fetch or change the
2451 YP/NIS domain name. These are system calls which exist on systems which
2454 * The time zone data files have been updated for the latest international
2457 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2458 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2462 * The C library now includes support for Sun RPC, from Sun's free
2463 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2464 are included. (There is still no support for YP.)
2466 * Tom Quinn has contributed a port of the C library to SGI machines running
2467 Irix 4 (mips-sgi-irix4).
2469 * The new `lockf' function is a simplified interface to the locking
2470 facilities of `fcntl', included for compatibility.
2472 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2474 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2476 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2479 * The error message printed by `assert' for a failed assertion now includes
2480 the name of the program (if using GNU ld) and the name of the calling
2481 function (with versions of GCC that support this).
2483 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2485 * The library now includes the <sys/mman.h> header file and memory
2486 management functions `mmap', `munmap', `mprotect', `msync', and
2487 `madvise', on systems that support those facilities.
2489 * The interface for `mcheck' has changed slightly: the function called to
2490 abort the program when an allocation inconsistency is detected now takes
2491 an argument that indicates the type of failure. The new function
2492 `mprobe' lets you request a consistency check for a particular block at
2493 any time (checks are normally done only when you call `free' or `realloc'
2496 * It is now possible to easily cross-compile the C library, building on one
2497 system a library to run on another machine and/or operating system. All
2498 you need to do is set the variable `HOST_CC' in `configparms' to the
2499 native compiler for programs to run on the machine you are building on (a
2500 few generator programs are used on Unix systems); set `CC' to the
2503 * The new function `fexecve' (only implemented on the GNU system) executes
2504 a program file given a file descriptor already open on the file.
2508 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2509 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2511 * You can set the variable `libprefix' in `configparms' to specify a prefix
2512 to be prepended to installed library files; this makes it easy to install
2513 the GNU C library to be linked as `-lgnuc' or whatever.
2515 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2516 copies a limited number of characters from a string, and returns the
2517 address of the last character written.
2519 * You no longer need to check for whether the installed `stddef.h' is
2520 compatible with the GNU C library. configure now checks for you.
2522 * You can now define a per-stream `fileno' function to convert the
2523 stream's cookie into an integral file descriptor.
2525 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2526 allocates zero bytes of storage, and returns a unique pointer which
2527 you can pass to `realloc' or `free'. The behavior is undefined if
2528 you dereference this pointer.
2530 * The C library now runs on Sony NEWS m68k machines running either
2531 NewsOS 3 or NewsOS 4.
2533 * The new `syscall' function is a system-dependent primitive function
2534 for invoking system calls. It has the canonical behavior on Unix
2535 systems, including unreliable return values for some calls (such as
2536 `pipe', `fork' and `getppid').
2538 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2539 to `EAGAIN', which is the preferred name. On systems whose kernels
2540 use two distinct codes, the C library now translates EWOULDBLOCK to
2541 EAGAIN in every system call function.
2545 * The GNU C Library Reference Manual is now distributed with the library.
2546 `make dvi' will produce a DVI file of the printed manual.
2547 `make info' will produce Info files that you can read on line using C-h i
2548 in Emacs or the `info' program.
2549 Please send comments on the manual to bug-glibc-manual@gnu.org.
2551 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2553 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2555 * Jason Merrill has contributed a port to the Sequent Symmetry running
2556 Dynix version 3 (i386-sequent-dynix).
2558 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2559 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2561 * New function `memory_warnings' lets you arrange to get warnings when
2562 malloc is running out of memory to allocate, like Emacs gives you.
2564 * The C library now contains the relocating allocator used in Emacs 19 for
2565 its editing buffers. This allocator (ralloc) minimizes allocation
2566 overhead and fragmentation by moving allocated regions around whenever it
2567 needs to. You always refer to a ralloc'd region with a "handle" (a
2568 pointer to a pointer--an object of type `void **').
2570 * There is a new `printf' format: `%m' gives you the string corresponding
2571 to the error code in `errno'.
2573 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2574 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2575 pass, the `a' modifier says to fill in a `char **' you pass with a
2578 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2579 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2580 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2582 * `mkstemp' is a traditional Unix function to atomically create and open a
2583 uniquely-named temporary file.
2587 * The standard location for the file that says what the local timezone is
2588 has changed again. It is now `/usr/local/etc/localtime' (or more
2589 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2591 * The distribution no longer contains any files with names longer than 14
2594 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2595 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2597 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2601 * The configuration process has changed quite a bit. The `configure'
2602 script is now used just like the configuration scripts for other GNU
2603 packages. The `sysdeps' directory hierarchy is much rearranged.
2604 The file `INSTALL' explains the new scheme in detail.
2606 * The header files no longer need to be processed into ANSI C and
2607 traditional C versions. There is just one set of files to install, and
2608 it will work with ANSI or old C compilers (including `gcc -traditional').
2610 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2611 MIPS DECStation running Ultrix 4.
2613 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2614 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2615 made itself into a shared library.
2617 * Yet further improved support for the i386, running 4.3 BSD-like systems
2618 (such as Mach 3 with the Unix single-server), or System V.
2620 * New function `strncasecmp' to do case-insensitive string comparison
2621 with limited length.
2623 * New function `strsep' is a reentrant alternative to `strtok'.
2625 * New functions `scandir' and `alphasort' for searching directories.
2627 * New function `setenv' is a better interface to `putenv'.
2629 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2630 function for traversing a directory tree.
2632 * The GNU obstack package is now also part of the C library.
2633 The new function `open_obstack_stream' creates a stdio stream that
2634 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2635 formatted output directly to an obstack.
2637 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2638 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2640 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2642 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2643 things to your strings.
2645 * There are some new test programs: test-fseek, testmb, and testrand.
2647 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2648 These ports are not finished, but are a good starting place for really
2649 supporting those systems.
2651 * `/etc/localtime' is now the standard location for the file that says what
2652 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2653 This follows the general principle that `/etc' is the place for all local
2654 configuration files.
2656 * The C library header files now use `extern "C"' when used by the C++
2657 compiler, so the C library should now work with C++ code.
2659 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2660 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2663 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2664 function which uses the `merge sort' algorithm, and is said to be
2665 significantly faster than the old GNU `qsort' function. Merge sort is
2666 now the standard `qsort' function. The new algorithm can require a lot
2667 of temporary storage; so, the old sorting function is called when the
2668 required storage is not available.
2670 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2671 provides the Unix `crypt' function, plus some other entry points.
2673 * The code and header files taken from 4.4 BSD have been updated with the
2674 latest files released from Berkeley.
2676 ----------------------------------------------------------------------
2677 Copyright information:
2679 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2681 Permission is granted to anyone to make or distribute verbatim copies
2682 of this document as received, in any medium, provided that the
2683 copyright notice and this permission notice are preserved,
2684 thus giving the recipient permission to redistribute in turn.
2686 Permission is granted to distribute modified versions
2687 of this document, or of portions of it,
2688 under the above conditions, provided also that they
2689 carry prominent notices stating who last changed them.
2692 version-control: never