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, 16351, 16352, 16512, 16560, 16704, 16783,
14 16850, 17053, 17090, 17195, 17269, 17293, 17322, 17523, 17542, 17569,
15 17581, 17588, 17596, 17620, 17621, 17628, 17631, 17692, 17711, 17715,
16 17776, 17779, 17792, 17836, 17912, 17916, 17930, 17932, 17944, 17949,
17 17964, 17965, 17967, 17969, 17978, 17987, 17991, 17996, 17998, 17999,
18 18007, 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039,
19 18042, 18043, 18046, 18047, 18049, 18068, 18080, 18093, 18100, 18104,
20 18110, 18111, 18116, 18125, 18128, 18138, 18185, 18196, 18197, 18206,
21 18210, 18211, 18217, 18220, 18221, 18234, 18244, 18247, 18287, 18319,
22 18324, 18333, 18346, 18397, 18409, 18410, 18412, 18418, 18422, 18434,
23 18444, 18468, 18469, 18470, 18479, 18483, 18495, 18496, 18497, 18498,
24 18507, 18512, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
25 18533, 18534, 18536, 18539.
27 * Cache information can be queried via sysconf() function on s390 e.g. with
28 _SC_LEVEL1_ICACHE_SIZE as argument.
30 * A buffer overflow in gethostbyname_r and related functions performing DNS
31 requests has been fixed. If the NSS functions were called with a
32 misaligned buffer, the buffer length change due to pointer alignment was
33 not taken into account. This could result in application crashes or,
34 potentially arbitrary code execution, using crafted, but syntactically
35 valid DNS responses. (CVE-2015-1781)
37 * The time zone file parser has been made more robust against crafted time
38 zone files, avoiding heap buffer overflows related to the processing of
39 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
40 large time zone data files. Overly long time zone specifiers in the TZ
41 variable no longer result in stack overflows and crashes.
43 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
44 for LD and GD on x86 and x86-64, has been implemented. You will need
45 binutils-2.24 or later to enable this optimization.
47 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
48 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
49 Hat). These updates cause user visible changes, such as the fix for bug
52 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
53 and getXXbyYY NSS calls for the same database, causing a denial-of-service
54 condition in some applications.
56 * Added vector math library named libmvec with the following vectorized x86_64
57 implementations: cos, cosf, sin, sinf, log, logf, exp, expf, pow.
58 The library can be disabled with --disable-mathvec. Use of the functions is
59 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
60 The library is linked in as needed when using -lm (no need to specify -lmvec
62 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
66 * The following bugs are resolved with this release:
68 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
69 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
70 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
71 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
72 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
73 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
74 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
75 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
76 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
77 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
80 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
81 too little memory for the to-be-scanned arguments and overflow the
82 allocated buffer. The implementation now correctly computes the required
83 buffer size when using malloc, and switches to malloc from alloca as
86 * A new semaphore algorithm has been implemented in generic C code for all
87 machines. Previous custom assembly implementations of semaphore were
88 difficult to reason about or ensure that they were safe. The new version
89 of semaphore supports machines with 64-bit or 32-bit atomic operations.
90 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
91 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
93 * Port to Altera Nios II has been contributed by Mentor Graphics.
95 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
96 implementations for powerpc64/powerpc64le.
97 Implemented by Adhemerval Zanella (IBM).
99 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
100 and powerpc64le. This may improve lock scaling of existing programs on
101 HTM capable systems. The lock elision code is only enabled with
102 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
103 powerpc will issue a transaction abort on every syscall to avoid side
104 effects being visible outside transactions.
106 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
107 AArch64. Contributed by ARM Ltd.
109 * i386 memcpy functions optimized with SSE2 unaligned load/store.
111 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
112 under certain input conditions resulting in the execution of a shell for
113 command substitution when the application did not request it. The
114 implementation now checks WRDE_NOCMD immediately before executing the
115 shell and returns the error WRDE_CMDSUB as expected.
117 * CVE-2012-3406 printf-style functions could run into a stack overflow when
118 processing format strings with a large number of format specifiers.
120 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
121 infinite loop if the DNS response contained a PTR record of an unexpected
124 * The minimum GCC version that can be used to build this version of the GNU
125 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
126 still be used to compile programs using the GNU C Library.
128 * The GNU C Library is now built with -Werror by default. This can be
129 disabled by configuring with --disable-werror.
131 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
133 * The obsolete sigvec function has been removed. This was the original
134 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
135 programs have been using instead for about 25 years. Of course, ABI
136 compatibility for old binaries using sigvec remains intact.
138 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
139 with newer versions of bison.
141 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
142 The original MIPS o32 hard-float ABI requires an FPU where double-precision
143 registers overlay two consecutive single-precision registers. MIPS32R2
144 introduced a new FPU mode (FR=1) where double-precision registers extend the
145 corresponding single-precision registers which is incompatible with the
146 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
147 require the use of FR=1 making a transition necessary. New o32 ABI
148 extensions enable users to migrate over time from the original o32 ABI
149 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
150 tracks the ABI of any loaded object and verifies that new objects are
151 compatible. Mode transitions will also be requested as required and
152 unsupportable objects will be rejected. The ABI checks include both soft and
153 hard float ABIs for o32, n32 and n64.
155 GCC 5 with GNU binutils 2.25 onwards:
156 It is strongly recommended that all o32 system libraries are built using the
157 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
158 with the original and all new o32 ABI extensions. Configure a MIPS GCC
159 compiler using --with-fp-32=xx to set this by default.
163 * The following bugs are resolved with this release:
165 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
166 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
167 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
168 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
169 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
170 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
171 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
172 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
173 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
174 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
175 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
176 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
177 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
178 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
179 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
181 * Reverted change of ABI data structures for s390 and s390x:
182 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
183 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
184 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
185 are preserved pointing straight to the same implementation as the old ones.
186 Given that, new callers will simply provide a too-big buffer to these
187 functions. Any applications/libraries out there that embed jmp_buf or
188 ucontext_t in an ABI-relevant data structure that have already been rebuilt
189 against 2.19 headers will have to rebuilt again. This is necessary in any
190 case to revert the breakage in their ABI caused by the glibc change.
192 * Support for file description locks is added to systems running the
193 Linux kernel. The standard file locking interfaces are extended to
194 operate on file descriptions, not file descriptors, via the use of
195 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
196 are associated with an open file instead of a process.
198 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
200 * The minimum Linux kernel version that this version of the GNU C Library
201 can be used with is 2.6.32.
203 * Running the testsuite no longer terminates as soon as a test fails.
204 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
205 with PASS or FAIL lines for individual tests. A summary of the results is
206 printed, including a list of failing lists, and "make check" exits with
207 error status if there were any unexpected failures. "make check
208 stop-on-test-failure=y" may be used to keep the old behavior.
210 * The am33 port, which had not worked for several years, has been removed
213 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
214 supported; they now act the same as _DEFAULT_SOURCE (but generate a
215 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
216 conflicted with POSIX (support for which was removed in 2.19), the
217 interfaces those macros enabled remain available when compiling with
218 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
221 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
223 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
224 This may improve lock scaling of existing programs on TX capable systems.
225 The lock elision code is only built with --enable-lock-elision=yes and
226 then requires a GCC version supporting the TX builtins. With lock elision
227 default mutexes are elided via __builtin_tbegin, if the cpu supports
228 transactions. By default lock elision is not enabled and the elision code
231 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
232 copy the path argument. This allowed programs to cause posix_spawn to
233 deference a dangling pointer, or use an unexpected pathname argument if
234 the string was modified after the posix_spawn_file_actions_addopen
237 * All supported architectures now use the main glibc sysdeps directory
238 instead of some being in a separate "ports" directory (which was
239 distributed separately before glibc 2.17).
241 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
242 On configurations that support it (all Linux configurations), it's now
243 used regardless of the --enable-add-ons switch to configure. It is no
244 longer possible to build such configurations without pthreads support.
246 * Locale names, including those obtained from environment variables (LANG
247 and the LC_* variables), are more tightly checked for proper syntax.
248 setlocale will now fail (with EINVAL) for locale names that are overly
249 long, contain slashes without starting with a slash, or contain ".." path
250 components. (CVE-2014-0475) Previously, some valid locale names were
251 silently replaced with the "C" locale when running in AT_SECURE mode
252 (e.g., in a SUID program). This is no longer necessary because of the
255 * On x86-64, the dynamic linker's lazy-binding support is now compatible
256 with application code using Intel MPX instructions. (With all previous
257 versions, the MPX register state could be clobbered when making calls
258 into or out of a shared library.) Note that while the new dynamic
259 linker is compatible with all known x86 hardware whether or not it
260 supports Intel MPX, some x86 instruction-set emulators might fail to
261 handle the new instruction encodings. This is known to affect Valgrind
262 versions up through 3.9 (but will be fixed in the forthcoming 3.10
263 release), and might affect other tools that do instruction emulation.
265 * Support for loadable gconv transliteration modules has been removed.
266 The support for transliteration modules has been non-functional for
267 over a decade, and the removal is prompted by security defects. The
268 normal gconv conversion modules are still supported. Transliteration
269 with //TRANSLIT is still possible, and the //IGNORE specifier
270 continues to be supported. (CVE-2014-5119)
272 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
273 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
274 resulting a denial-of-service security vulnerability in applications which
275 use functions related to iconv. (CVE-2014-6040)
279 * The following bugs are resolved with this release:
281 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
282 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
283 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
284 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
285 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
286 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
287 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
288 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
289 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
290 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
291 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
292 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
293 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
294 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
295 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
296 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
297 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
298 16431, 16453, 16474, 16506, 16510, 16529
300 * Slovenian translations for glibc messages have been contributed by the
301 Translation Project's Slovenian team of translators.
303 * The public headers no longer use __unused nor __block. This change is to
304 support compiling programs that are derived from BSD sources and use
305 __unused internally, and to support compiling with Clang's -fblock
306 extension which uses __block.
308 * CVE-2012-4412 The strcoll implementation caches indices and rules for
309 large collation sequences to optimize multiple passes. This cache
310 computation may overflow for large collation sequences and may cause a
311 stack or buffer overflow. This is now fixed to use a slower algorithm
312 which does not use a cache if there is an integer overflow.
314 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
315 rules for large collation sequences to optimize multiple passes and falls
316 back to alloca if malloc fails, resulting in a possible stack overflow.
317 The implementation now falls back to an uncached collation sequence lookup
320 * CVE-2013-4788 The pointer guard used for pointer mangling was not
321 initialized for static applications resulting in the security feature
322 being disabled. The pointer guard is now correctly initialized to a
323 random value for static applications. Existing static applications need
324 to be recompiled to take advantage of the fix (bug 15754).
326 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
327 to the d_name member of struct dirent, or omit the terminating NUL
328 character. (Bugzilla #14699).
330 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
331 aligned_alloc functions could allocate too few bytes or corrupt the
332 heap when passed very large allocation size values (Bugzilla #15855,
335 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
336 for AF_INET6 has been fixed (Bugzilla #16072).
338 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
339 pap_CW, quz_PE, the_NP.
341 * Substantially revised locales: gd_GB, ht_HT
343 * The LC_ADDRESS field was updated to support country_car for almost all
346 * ISO 1427 definitions were updated.
348 * ISO 3166 definitions were updated.
350 * The localedef utility now supports --big-endian and --little-endian
351 command-line options to generate locales for a different system from that
352 for which the C library was built.
354 * Binary locale files now only depend on the endianness of the system for
355 which they are generated and not on other properties of that system. As a
356 consequence, binary files generated with new localedef may be incompatible
357 with old versions of the GNU C Library, and binary files generated with
358 old localedef may be incompatible with this version of the GNU C Library,
359 in the following circumstances:
361 + Locale files may be incompatible on m68k systems.
363 + Locale archive files (but not separate files for individual locales) may
364 be incompatible on systems where plain "char" is signed.
366 * The configure option --disable-versioning has been removed. Builds with
367 --disable-versioning had not worked for several years.
369 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
370 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
372 * SystemTap probes for malloc have been introduced.
374 * SystemTap probes for slow multiple precision fallback paths of
375 transcendental functions have been introduced.
377 * Support for powerpc64le has been added.
379 * The soft-float powerpc port now supports e500 processors.
381 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
383 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
384 set of header declarations that are enabled by default, even when other
385 feature test macros or compiler options such as -std=c99 would otherwise
386 disable some of those declarations.
388 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
389 conflict with POSIX. The libbsd-compat library (which was a dummy library
390 that did nothing) has also been removed.
392 * Preliminary documentation about Multi-Thread, Async-Signal and
393 Async-Cancel Safety has been added.
395 * Change of ABI data structures for s390 and s390x:
396 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
397 allow for future hardware extensions. All library functions that accept or
398 return these structures were versioned in order to provide backwards
399 compatibility with existing code. However, not all cases can be handled
400 with interface versioning. If an application embeds either structure into
401 another structure and that structure is passed to another compilation unit
402 which expects the newer larger-sized object then any access to the new
403 fields will result in undefined behaviour. Similarly any access to fields
404 that were moved by the enlarging of the structures will cause undefined
405 behaviour. To fix the undefined behaviour all objects that are part of the
406 final in-memory image must agree on the size of structures, and this may
407 require recompilation.
411 * The following bugs are resolved with this release:
413 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
414 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
415 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
416 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
417 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
418 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
419 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
420 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
421 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
422 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
423 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
424 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
425 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
428 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
429 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
430 Distributions can re-enable building and using pt_chown via the new configure
431 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
432 considerable security risks and should only be used if the distribution
433 understands and accepts the risks.
435 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
438 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
439 fixed (Bugzilla #15330).
441 * Add support for calling C++11 thread_local object destructors on thread
442 and program exit. This needs compiler support for offloading C++11
443 destructor calls to glibc.
445 * Improved worst case performance of libm functions with double inputs and
448 * Support for priority inherited mutexes in pthread condition variables on
449 non-x86 architectures.
451 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
453 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
455 * Optimized string functions for ARM. Implemented by Will Newton and
458 * Optimized libm functions for SPARC. Implemented by David S. Miller.
460 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
463 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
464 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
466 * Added a benchmark framework to track performance of functions in glibc.
468 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
469 It is based on draft TS 18661 and currently enabled as a GNU extension.
471 * On Linux, the clock function now uses the clock_gettime system call
472 for improved precision, rather than old times system call.
474 * Added support for version-3 tz format files. This is needed when using
475 the tz database release 2013e or later, and affects a few unusual cases --
476 currently only TZ='America/Godthab' for time stamps after 2037.
478 * Added new API functions pthread_getattr_default_np and
479 pthread_setattr_default_np to get and set the default pthread
480 attributes of a process.
482 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
483 This may improve lock scaling of existing programs on TSX capable systems.
484 When the --enable-lock-elision=yes parameter is specified at configure
485 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
488 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
489 availability). Implemented by Ryan S. Arnold.
491 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
495 * The following bugs are resolved with this release:
497 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
498 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
499 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
500 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
501 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
502 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
503 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
504 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
505 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
506 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
507 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
508 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
509 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
510 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
511 14879, 14889, 14893, 14898, 14914.
513 * Optimization of memcpy for MIPS.
515 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
516 EMFILE has been fixed (Bugzilla #14889).
518 * The add-on ports collection is now distributed in the "ports" subdirectory
519 of the main GNU C Library distribution, rather than separately.
521 * Port to ARM AArch64 contributed by Linaro.
523 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
524 Optimized versions of memcpy, memset, and memcmp added for System z10 and
526 Implemented by Andreas Krebbel.
528 * The new function secure_getenv allows secure access to the environment,
529 returning NULL if running in a SUID/SGID process. This function replaces
530 the internal function __secure_getenv.
532 * SystemTap static probes have been added into the dynamic linker.
533 Implemented by Gary Benson.
535 * Optimizations of string functions strstr, strcasestr and memmem.
536 Implemented by Maxim Kuvyrkov.
538 * The minimum Linux kernel version that this version of the GNU C Library
539 can be used with is 2.6.16.
541 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
542 powerpc POWER7. Implemented by Will Schmidt.
544 * New configure option --disable-nscd builds the C library such that it
545 never attempts to contact the Name Service Caching Daemon (nscd).
546 New configure option --disable-build-nscd avoids building nscd itself;
547 this is the default if --disable-nscd is used.
549 * Improved support for cross-compilation, including cross-testing and
550 bootstrap builds without a previously built glibc.
552 * Several testsuite tests are now able to test multiple IFUNC variants of an
553 interface, rather than just testing the one that would be chooen by
556 * New configure options --with-bugurl and --with-pkgversion, for
557 distributors to use to embed their bug-reporting and package version
558 information in --help and --version output.
560 * The ttyname and ttyname_r functions on Linux now fall back to searching for
561 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
562 allows creation of chroots without the procfs mounted on /proc.
564 * The `crypt' function now fails if passed salt bytes that violate the
565 specification for those values. On Linux, the `crypt' function will
566 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
567 enabled, and fail on encrypted strings using the MD5 or DES algorithm
568 when the mode is enabled.
570 * The `clock_*' suite of functions (declared in <time.h>) is now available
571 directly in the main C library. Previously it was necessary to link with
572 -lrt to use these functions. This change has the effect that a
573 single-threaded program that uses a function such as `clock_gettime' (and
574 is not linked with -lrt) will no longer implicitly load the pthreads
575 library at runtime and so will not suffer the overheads associated with
576 multi-thread support in other code such as the C++ runtime library.
578 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
583 * The following bugs are resolved with this release:
585 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
586 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
587 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
588 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
589 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
590 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
591 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
592 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
593 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
594 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
595 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
596 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
597 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
598 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
599 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
600 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
601 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
602 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
603 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
604 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
605 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
606 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
609 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
610 configuring glibc with:
611 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
612 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
613 Implemented by H.J. Lu.
617 + define static_assert
619 + do not declare gets
621 + declare at_quick_exit and quick_exit also for ISO C11
623 + aligned_alloc. NB: The code is deliberately allows the size parameter
624 to not be a multiple of the alignment. This is a moronic requirement
625 in the standard but it is only a requirement on the caller, not the
630 + uchar.h support added
632 + CMPLX, CMPLXF, CMPLXL added
634 Implemented by Ulrich Drepper.
636 * Support for the IA-64 has been moved to ports.
638 * Remove support for anything but ELF binary format
640 * Checking versions of poll, ppoll added.
641 Implemented by Ulrich Drepper.
643 * More generic and 64-bit performance optimizations to math functions.
644 Implemented by Ulrich Drepper.
646 * New configure option --enable-obsolete-rpc makes the deprecated RPC
647 headers and functions available at compile time as they were before
648 version 2.14. This option will be removed at some time in the future
649 after the TI-RPC library becomes fully sufficient for the needs of
650 existing applications.
652 * Compatibility code for Linux kernel versions before 2.4 has been removed.
653 Note that glibc is not expected to work with any Linux kernel version
656 * New header <sys/auxv.h> and function getauxval allowing easy access to
657 the AT_* key-value pairs passed from the Linux kernel. The header also
658 defines the HWCAP_* bits associated with the AT_HWCAP key.
660 * New locales: mag_IN
662 * New configure option --enable-systemtap builds SystemTap static probes
663 into libc for setjmp and longjmp and into libpthread for various operations.
664 So far the setjmp/longjmp probes and some of the libpthread probes are
665 provided only for i*86 and x86_64.
666 Implemented by Roland McGrath and Rayson Ho.
668 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
670 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
673 * More optimized functions for SPARC. Implemented by David S. Miller.
675 * Improved support for cross-compilation, especially bootstrap builds
676 without a previously built glibc.
678 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
679 Chris Metcalf from Tilera.
681 * Support for the old ARM ABI has been removed from ports. Only the EABI is
682 now supported for ARM processors.
684 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
685 as the name of the dynamic linker, to distinguish it from the
686 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
688 * Support for CRIS has been removed from ports.
690 * A new class of installed header has been documented for low-level
691 platform-specific functionality. PowerPC added the first instance with a
692 function to provide time base register access. Contributed by Tulio
693 Magno Quites Machado Filho.
695 * ix86 configurations now install header files that are consistent with
696 what x86-64 configurations install. These same header files can be used
697 for -m32, -m64, or -mx32 builds.
698 Contributed by H.J. Lu.
700 * Math library bug fixes. A thorough audit of all open math library bugs was
701 conducted by Joseph Myers. Significant progress was made on many math
702 library bugs resulting in more accurate exceptions and function results.
703 Many thanks to all those that contributed including Andreas Jaeger for his
704 patch review and work on the x87 trigonometric instruction issues.
706 * Timezone data is no longer installed. Timezone-related binaries and scripts
707 will continue to be installed. Users should obtain their timezone data from
708 their distribution provider or from the tzdata package at
709 <ftp://munnari.oz.au/pub/>.
713 * The following bugs are resolved with this release:
715 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
716 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
717 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
718 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
719 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
720 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
721 13484, 13506, 13515, 13523, 13524, 13538, 13540
723 * New program pldd to list loaded object of a process
724 Implemented by Ulrich Drepper.
726 * Add nss_db support back to glibc. No more dependency on Berkeley db
727 and support for initgroups lookups.
728 Implemented by Ulrich Drepper.
730 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
731 Contributed by HJ Lu.
733 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
734 Contributed by HJ Lu.
736 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
737 on x86-32 and x86-64.
738 Contributed by Liubov Dmitrieva.
740 * Optimized strchr and strrchr for SSE on x86-32.
741 Contributed by Liubov Dmitrieva.
743 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
744 for x86-64 and x86-32.
745 Contributed by Liubov Dmitrieva.
747 * New interfaces: scandirat, scandirat64
748 Implemented by Ulrich Drepper.
750 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
751 Implemented by Ulrich Drepper.
753 * nscd now also caches the netgroup database.
754 Implemented by Ulrich Drepper.
756 * Integrate libm with gcc's -ffinite-math-only option.
757 Implemented by Ulrich Drepper.
759 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
760 to math functions. Implemented by Ulrich Drepper.
762 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
763 Implemented by Ulrich Drepper.
765 * New Linux interfaces: process_vm_readv, process_vm_writev
767 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
768 Implemented by Ulrich Drepper.
770 * Optimized nearbyint and strcasecmp for PPC.
771 Implemented by Adhemerval Zanella.
773 * New locales: bho_IN, unm_US, es_CU, ta_LK
777 * The following bugs are resolved with this release:
779 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
780 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
781 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
782 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
783 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
784 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
785 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
786 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
787 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
788 12795, 12811, 12813, 12814, 12841
790 * The RPC implementation in libc is obsoleted. Old programs keep working
791 but new programs cannot be linked with the routines in libc anymore.
792 Programs in need of RPC functionality must be linked against TI-RPC.
793 The TI-RPC implementation is IPv6 enabled and there are other benefits.
795 Visible changes of this change include (obviously) the inability to link
796 programs using RPC functions without referencing the TI-RPC library and the
797 removal of the RPC headers from the glibc headers.
798 Implemented by Ulrich Drepper.
800 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
801 syncfs, setns, sendmmsg
803 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
804 yue_HK, lij_IT, mhr_RU
806 * New encodings: CP770, CP771, CP772, CP773, CP774
808 * New program sotruss to trace calls through PLTs
809 Implemented by Ulrich Drepper.
811 * The malloc hook implementation is marked deprecated and will be removed
812 from the default implementation in the next version. The design never
813 worked ever since the introduction of threads. Even programs which do
814 not create threads themselves can use multiple threads created internally.
818 * The following bugs are resolved with this release:
820 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
821 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
822 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
823 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
826 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
828 * POWER7 optimizations: memset, memcmp, strncmp
830 * New optimized string functions for x86-64: strnlen (SSE2),
831 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
832 Implemented by Ulrich Drepper.
836 * The following bugs are resolved with this release:
838 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
839 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
840 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
841 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
842 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
843 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
844 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
845 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
847 * New interfaces: pthread_getname_np, pthread_setname_np
849 * New Linux interface: recvmmsg
851 * STT_GNU_IFUNC implemented for Sparc by David Miller.
853 * The dynamic linker now recognizes supported ABI versions from the
854 EI_ABIVERSION field in the ELF header.
855 Implemented by Ulrich Drepper.
857 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
858 will not be used to fill in password fields in the passwd.byname replies.
859 Instead it is used to synthesize the shadow.byname table, should it be
860 missing. This is a useful mode in some installations involving Solaris.
861 Implemented by Ulrich Drepper.
863 * New locales: kok_IN, sq_MK, cv_RU
867 * The following bugs are resolved with this release:
869 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
870 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
871 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
872 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
873 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
874 10789, 10817, 10823, 10840, 10847
876 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
878 Implemented by Ulrich Drepper.
880 * Checking version of longjmp added that fails if an uninitialized stack
881 frame would be created. Implemented by Ulrich Drepper.
883 * STT_GNU_IFUNC is now supported in static executables.
884 Implemented by H.J. Lu.
886 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
888 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
889 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
890 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
891 Contributed by H.J. Lu.
893 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
894 Implemented by Ulrich Drepper.
896 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
898 Contributed by H.J. Lu.
900 * Support for fma instruction in AVX on x86-64.
901 Implemented by H.J. Lu and Ulrich Drepper.
903 * AVX support in x86-64 auditing support in ld.so.
904 Implemented by H.J. Lu.
906 * STB_GNU_UNIQUE support added.
907 Implemented by Ulrich Drepper.
909 * Implement second fallback mode for optimized DNS lookup for even more
910 broken environments. If two requests from the same port are not
911 handled correctly close the socket and open a new one before sending
912 the second request. The 'single-request-reopen' option in /etc/resolv.conf
913 can be used to select this mode right away, instead of rediscovering the
914 necessity is every process again.
915 Implemented by Ulrich Drepper.
917 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
918 Implemented by Adam Tkac.
920 * Optimized iconv conversions for S390x.
921 Implemented by Andreas Krebbel.
923 * Using condvars with PI mutexes is now more efficient due to kernel
924 support for requeueing to PI futexes. NPTL support added for x86-64.
925 Implemented by Ulrich Drepper.
927 * New locales: ps_AF, my_MM
931 * The following bugs are resolved with this release:
933 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
934 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
935 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
936 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
937 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
939 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
940 Implemented by Ulrich Drepper.
942 * New Linux interfaces: accept4, fallocate, fallocate64.
943 Implemented by Ulrich Drepper.
945 * Correct declarations of string function when used in C++ code. This
946 could lead to compile errors for invalid C++ code.
948 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
951 * New POSIX 2008 interface: psiginfo
952 Implemented by Ulrich Drepper.
954 * New ISO C++1x interfaces: quick_exit, at_quick_exit
955 Implemented by Ulrich Drepper.
957 * Support for selecting between multiple function definitions at runtime
958 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
960 * The libcrypt library can now use the hash function implementations in
961 NSS. Implemented by Ulrich Drepper.
963 * The malloc implementation can be compiled to be less memory efficient
964 but higher performing in multi-threaded programs.
965 Implemented by Ulrich Drepper.
967 * New locales: nan_TW@latin, ks_IN
969 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
970 Implemented by Ulrich Drepper.
972 * Extended printf hook support. It is possible to use user-defined types
973 and extend existing format specifiers.
974 Implemented by Ulrich Drepper.
976 * Handling for group shadow files has been added.
977 Implemented by Ulrich Drepper.
979 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
980 servers (the case, e.g., for some people using the built-in DNS
981 server in ADSL modems/routers). There is a once-per-process timeout
982 in case of a broken server. To avoid it, users can run nscd or put
983 'options single-request' in /etc/resolv.conf.
984 Implemented by Ulrich Drepper.
988 * The following bugs are resolved with this release:
990 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
991 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
992 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
993 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
994 6968, 6974, 6980, 6995, 7008, 7009, 7029
996 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
997 up at the same time. Implemented by Ulrich Drepper.
999 * TLS descriptors for LD and GD on x86 and x86-64.
1000 Implemented by Alexandre Oliva.
1002 * getaddrinfo now handles DCCP and UDPlite.
1003 Implemented by Ulrich Drepper.
1005 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1006 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1007 Implemented by Ulrich Drepper.
1009 * New implementation of memmem, strstr, and strcasestr which is O(n).
1010 Implemented by Eric Blake.
1012 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1014 * Implement "e" option for popen to open file descriptor with the
1015 close-on-exec flag set. Implemented by Ulrich Drepper.
1017 * Implement "b" mode for fmemopen. In this mode writes writes don't
1018 implicitly add a NUL byte and seeks from the end of the buffer really
1019 use the buffer end, not the string length as the basis.
1020 Implemented by Ulrich Drepper.
1022 * Many functions, exported and internal, now atomically set the close-on-exec
1023 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1025 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1027 Implemented by Pravin Satpute.
1029 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1033 * The following bugs are resolved with this release:
1035 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1036 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1037 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1038 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1039 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1040 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1041 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1043 * New locales: bo_CN, bo_IN, shs_CA.
1045 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1047 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1048 Implemented by Pravin Satpute.
1050 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1052 * nscd caches now all timeouts for DNS entries
1053 Implemented by Ulrich Drepper.
1055 * nscd is more efficient and wakes up less often.
1056 Implemented by Ulrich Drepper.
1058 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1059 vdprintf, and obstack_vprintf.
1060 Implemented by Jakub Jelinek.
1062 * Faster memset for x86-64.
1063 Implemented by Harsha Jagasia and H.J. Lu.
1065 * Faster memcpy on x86.
1066 Implemented by Ulrich Drepper.
1068 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1069 Implemented by Ulrich Drepper.
1071 * Faster sqrt and sqrtf implemention for some PPC variants.
1072 Implemented by Steven Munroe.
1076 * The following bugs are resolved with this release:
1078 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1079 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1080 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1081 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1082 5071, 5103, 5104, 5112, 5113, 5184, 5186
1084 * More checking functions: fread, fread_unlocked, open*, mq_open.
1085 Implemented by Jakub Jelinek and Ulrich Drepper.
1087 * Extend fortification to C++. Implemented by Jakub Jelinek.
1089 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1090 by not recognizing 'a' as a modifier when those specs are requested.
1091 Implemented by Jakub Jelinek.
1093 * PPC optimizations to math and string functions.
1094 Implemented by Steven Munroe.
1096 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1097 options to be passed. Implemented by Ulrich Drepper.
1099 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1101 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1102 Implemented by Ulrich Drepper.
1104 * Handle private futexes in the NPTL implementation.
1105 Implemented by Jakub Jelinek and Ulrich Drepper.
1107 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1108 Implemented by Roland McGrath and Ulrich Drepper.
1110 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1112 * SHA-256 and SHA-512 based password encryption.
1113 Implemented by Ulrich Drepper.
1115 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1116 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1119 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1120 Implemented by Ulrich Drepper.
1124 * The following bugs are resolved with this release:
1126 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1127 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1128 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1129 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1130 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1131 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1132 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1135 * New Linux interfaces: epoll_pwait, sched_getcpu.
1137 * New generic interfaces: strerror_l.
1139 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1143 * The following bugs are resolved with this release:
1145 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1146 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1147 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1148 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1149 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1150 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1151 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1152 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1153 3225, 3251, 3252, 3253, 3273
1155 * For Linux, the sorting of addresses returned by getaddrinfo now also
1156 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1157 Implemented by Ulrich Drepper.
1159 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1160 Implemented by Ulrich Drepper.
1162 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1164 * New iconv module for MIK. Contributed by Alexander Shopov.
1166 * For sites with broken group and/or passwd database, the auto-propagate
1167 option of nscd can prevent creating ID lookup entries from the results
1168 of a name lookup and vice versa. This usually is no problem but some
1169 site might have problems with the default behavior.
1170 Implemented by Ulrich Drepper.
1172 * Iterating over entire database in NIS can be slow. With the
1173 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1174 to trade time for memory. The entire database will be read at once.
1175 Implemented by Ulrich Drepper.
1177 * The interfaces introduced in RFC 3542 have been implemented by
1180 * Support for the new ELF hash table format was added by Ulrich Drepper.
1182 * Support for priority inheritance mutexes added by Jakub Jelinek and
1185 * Support for priority protected mutexes added by Jakub Jelinek.
1187 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1188 or_IN, csb_PL, fy_NL, sr_ME.
1192 * More overflow detection functions.
1194 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1195 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1197 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1198 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1199 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1200 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1201 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1202 by Masahide Washizawa.
1204 * It is now possible to install audit libraries for the dynamic linker using
1205 LD_AUDIT. Implemented by Ulrich Drepper.
1207 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1208 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1209 For a libc and libpthread that works well on Linux 2.4 kernels, we
1210 recommend using the stable 2.3 branch.
1212 * The new function open_wmemstream acts like open_memstream,
1213 but uses a wchar_t wide character buffer.
1215 * The new function ppoll is an improved version of poll, similar to pselect.
1217 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1218 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1219 renameat, unlinkat, linkat, symlinkat, readlinkat.
1221 * New Linux kernel system calls: unshare,
1222 inotify_init, inotify_add_watch, inotify_rm_watch.
1224 * The euidaccess function is now also known by the alias eaccess,
1225 for compatibility with some other systems.
1227 * Timezone data updated to 2006b version.
1231 * The following bugs are resolved with this release:
1233 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1234 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1235 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1236 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1237 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1238 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1240 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1242 * As of this release, GCC 4 can be used to compile the C Library.
1244 * Timezone data updated to 2005m version.
1248 * The following bugs are resolved with this release:
1250 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1251 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1252 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1253 777, 787, 821, 822, 823, 825
1255 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1259 * Support for RFC 3678. Real implementations exist only for Linux so far.
1260 Implemented by Ulrich Drepper.
1262 * nscd can now cache entries persistently. Expiring entries are reloaded.
1263 For speedups the cache can be shared in memory with client processes.
1264 Implemented by Ulrich Drepper.
1266 * nscd can now perform SELinux checks.
1267 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1269 * getaddrinfo queries are now cached. Canonical name lookup is performed
1271 Implemented by Ulrich Drepper.
1273 * The nothrow function attribute is used when headers are used by gcc when
1274 compiling C code. This can avoid significant amounts of exception
1277 * The malloc functions perform more error checking and are stricter when
1278 it comes to reacting on errors. The default action is to terminate
1279 the process after showing an error message. Implemented by Ulrich Drepper.
1281 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1282 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1284 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1285 namespaces using the new function dlmopen(). This feature is of course,
1286 like most other dynamic loading functionality, not available in statically
1287 linked applications. Implemented by Ulrich Drepper.
1289 * Low-overhead boundary checking variants of string and some stdio functions
1290 were added. These are to be used in conjunction with a gcc patch by
1291 Jakub Jelinek which adds calls to these functions if possible.
1292 Implemented by Jakub Jelinek and Ulrich Drepper.
1294 * Old code for several operating systems and machine architectures that
1295 have not been in working condition in a long time have been removed from
1296 the main source tree maintained by the GNU C Library's maintainers.
1297 These files are now reside in the separate `ports' source module
1298 that is usable as an add-on when building the library.
1302 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1303 interrogate the dynamic linker, compatible with the Solaris interface.
1305 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1306 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1308 * getifaddrs now uses the netlink interface on Linux to get its information.
1309 Implemented by Thorsten Kukuk.
1311 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1312 Implemented by Ulrich Drepper.
1314 * support for non-executable stacks on x86 has been added. Changes mostly
1317 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1320 * getaddrinfo now performs destination address selection according to
1325 * Thread-safe interfaces for many functions that access locale data
1326 were added in version 2.3, but these features were omitted from NEWS.
1327 Many functions have variants with an `_l' suffix that take a `locale_t'
1328 object as a parameter rather than consulting the current locale.
1329 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1330 create and maintain `locale_t' objects. Additionally, the new function
1331 `uselocale' sets "the current locale" (as used by functions not so
1332 parameterized) set for an individual thread. These features were added
1333 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1335 * The functions getresuid, getresgid, setresuid, and setresgid, which
1336 have long been available on Linux, are now declared in <unistd.h>
1337 and are now also available on the Hurd.
1339 * ELF thread-local storage support (TLS) now works on x86-64.
1341 * The new dynamic string token $LIB is expanded in shared library names.
1342 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1344 * Aldy Hernandez contributed complete software floating point support for
1345 PowerPC machines with no FPU.
1347 * fexecve is implemented on Linux.
1349 * The `btowc' function should work at least twice as fast due to
1350 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1352 * With approriate thread add-ons cancelable functions are now implemented
1353 in libc.so as well. No need to call the function in libpthread. This
1354 change allowed to finally disable the incorrect and expensive handling
1355 of weak definition in ld.so.
1357 * Yet more PLT entries in libc.so have been removed. We finally arrived
1358 at the bare minimum. Startup times improved appropriately.
1360 * Support for the new Linux/x86 system call interface was added. The
1361 AT_SYSINFO auxiliary vector entry is recognized and handled.
1365 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1368 * iconv (the program and the interface) now accepts empty names (excluding
1369 options like //TRANSLIT) to mean "use charset of current locale".
1371 * localedef can now transliterate characters in strings which are not in
1372 the provided charmap. The information from the input locale is used.
1374 * Prelinking support was added for ELF targets. This requires additional
1375 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1377 * Read-only stdio streams now use mmap to speed up operation by eliminating
1378 copying and buffer underflows. To use add 'm' to the mode string of
1379 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1381 * The malloc functions were completely rewritten by Wolfram Gloger based
1382 on Doug Lea's malloc-2.7.0.c.
1384 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1385 implementation of regex.
1387 * Bruno Haible upgraded the iconv and locale implementation to support
1390 * Contents of the LC_* and LANG environment variables in the CEN style are
1391 not recognized anymore. It never was used. Change by Ulrich Drepper.
1393 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1394 thread-local storage (TLS) ABI on some platforms.
1395 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1397 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1398 EUC-JISX0213, and TSCII.
1400 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1401 BSD-compatible interface for getting all network interface addresses.
1402 Implementation for IPv4 by Roland McGrath.
1404 * Loading of locale data is faster due to the introduction of a locale
1405 archive. Implemented by Roland McGrath and Ulrich Drepper.
1407 * Startup times are significantly reduced by not using exported functions
1408 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1411 * Steven Munroe contributed a port to PowerPC64/Linux.
1415 * The Hurd now uses the GNU libio implementation of stdio rather than the
1416 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1418 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1419 with the same behavior as the Linux system call of the same name.
1423 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1424 128-bit long double format.
1426 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1427 IBM1161, and IBM1162 charsets.
1429 * Andreas Jaeger contributed a port to x86-64/Linux.
1431 * Peter Bruin contributed a port to PowerPC/Hurd.
1433 * libc functions using I/O streams now can handle wide-oriented streams
1436 * optimizations in the dynamic linker. Binaries created by recent binutils
1437 versions start up quicker due to reduced time spent on relocations.
1439 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1443 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1444 asinh, atanh, j0 for the 128-bit long double format.
1446 * Bruno Haible updated all the code handling Unicode in some form to
1447 support Unicode 3.1.
1449 * Speed of regex for single-byte locales is back to previous levels.
1450 Patch by Isamu Hasegawa.
1452 * Alpha, SPARC, and IA-64 now also using floating stacks.
1454 * Startup time of internationalized applications greatly improved through
1455 iconv cache. Use iconvconfig to generate the cache file.
1456 Contributed by Ulrich Drepper.
1458 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1459 severe performance problems. Patch by David Mosberger.
1461 * The Hurd port got a lot more functionality like AIO, various stdio
1462 extensions, etc. Mainly done by Roland McGrath.
1464 * mtrace can now lookup symbols in shared libraries.
1468 * Intel's IA-64 math library is largely integrated. It provides fast and
1469 accurate implementatations for most basic and standard math functions
1470 in float, double, and long double format.
1472 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1473 and asin for the 96-bit long double format and asin, log, tan for the
1474 128-bit long double format.
1476 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1477 The basic double functions exist today. Contributed by Abraham Ziv
1478 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1479 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1481 * An asynchronous name lookup library was added. The interface is designed
1482 after POSIX AIO. The proposal was circulated beforehand to get comments.
1483 No negative ones came in. Implemented by Ulrich Drepper.
1485 * Port to S390/64bit contributed by Martin Schwidefsky
1486 <schwidefsky@de.ibm.com>.
1488 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1489 of functions for Linux/IA-64.
1491 * The RPC code is now thread safe. Threads can now use the same service
1492 of different services at the same time. Patch by Eric Norum
1493 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1495 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1496 family of functions for Linux/S390.
1498 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1499 of functions for Linux/x86.
1501 * Port to Linux/CRIS contributed by Axis Communications.
1505 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1506 we can now check for namespace violations and missing declarations. The
1507 result is that almost all headers are now Unix-compliant (as defined in
1508 the upcoming XPG6). The negative side is that some programs might need
1509 corrections, too, if they depend on the incorrect form of the headers in
1510 previous versions which defined too many symbols and included too many
1513 * regex now handles multibyte character sets correctly.
1514 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1516 * iconv (the program) does now conform to the upcoming XPG6 and handles
1517 charmaps. Instead of the charset names the path of charmaps can be
1518 provided and the conversion happens based on this data.
1519 Contributed by Ulrich Drepper.
1521 * The locale program now provides detailed information about the installed
1526 only lists the names of the supported locales
1530 provides details such as country, language, and codeset name.
1531 Contributed by Ulrich Drepper.
1535 * The gencat program now parses the input file according to the charset
1536 selected by the LC_CTYPE category. This is important for stateful
1537 character sets. To make generating catalogs easier there is a way
1538 to overwrite the charset selected by the locale: before the first
1539 message or $ quote line the catalog can contain a line like
1541 $ codeset=ISO-8859-2
1543 to select the charset (ISO-8859-2 in this case).
1545 Implemented by Shinya Hanataka and Ulrich Drepper.
1547 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1548 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1549 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1551 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1552 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1554 * The LANGUAGE environment variable is now ignored unless the locale is
1555 changed from the default "C" locale.
1557 * The usual bug fixes.
1561 * Greg McGary added runtime support for bounds checking using gcc's
1562 new -fbounded-pointers option. ix86 target is complete. PowerPC
1565 * Thorsten Kukuk added secure mode support to nscd.
1567 * The Berkeley db libraries have been removed.
1569 Related, the nss_db module is now in a separate package since it
1570 obviously requires a database library being available.
1572 * Wide character I/O streams implemented by Ulrich Drepper.
1574 * Functions from the extended socket API added by Ulrich Drepper.
1576 * Functions feenableexcept and fedisableexcept to control the
1577 behaviour of individual exceptions have been added by Andreas Jaeger.
1579 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1581 * The resolver code has been updated from bind 8.2.3-T5B which supports
1582 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1585 This change could in some situations effect backward compatibility. Since
1586 now `_res' is a thread-local instead of a global variable, modifying it
1587 in one thread does not have any effect in other threads.
1589 The resolver library was also extended to allow IPv6 as the transport
1590 protocol for the requests. This work was done by Stig Venaas.
1592 * Compatibility code for K&R C compilers has been removed from the
1593 header files. A ISO C compiler is needed to use the library
1594 (conforming to either C89 or C99 standard).
1596 * Complete rewrite of the localedef program to support multibyte character
1597 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1598 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1599 Implemented by Ulrich Drepper.
1601 Bruno Haible significantly improved the generation and use of the data
1602 structures for the wide character tables.
1604 * Plural handling in gettext implemented by Ulrich Drepper.
1606 * The utmp daemon has been removed.
1608 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1610 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1613 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1615 * POSIX barriers implemented by Kaz Kylheku.
1617 * POSIX spawn function family implemented by Ulrich Drepper.
1619 * POSIX spinlocks are now available.
1621 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1623 * the configure option --enable-kernel=X.Y.Z allows to strip out
1624 compatibility for kernel versions before X.Y.Z. This is currently only
1625 implemented for Linux.
1627 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1628 field sin6_scope_id. This means that all programs using IPv6 should be
1629 recompiled. Don't expect binary compatibility with previous glibc
1632 * various conversion modules for IBM character sets contributed by
1635 * IA-64 port by Jes Sorensen and HJ Lu.
1649 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1651 * New xdr functions are added; some rpc functions are now 64bit clean.
1653 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1655 * Fixed known incompatibilities with glibc 2.0.
1657 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1659 * Optimized a number of functions (especially the ELF dynamic loader).
1661 * Update timezone data files.
1663 * lots of charmaps corrections
1665 * some new locale definitions and charmaps
1670 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1671 conform to POSIX member type requirements. Symbol versions have been
1672 adjusted as needed within the library, and for direct use by applications,
1673 but there is potential for problems if third-party libraries use
1674 struct timeval as part of their interface. This does not present
1675 a problem for X and other "essential" system libraries.
1677 * An additional locale model to support C++ Standard Library locale
1678 model and probably more was implemented by Ulrich Drepper.
1680 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1683 * Miles Bader provided the `argp' function family to support hierachical
1684 command line argument parsing, layered on top of getopt.
1686 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1688 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1691 * scanf recognizes the %a and %A format for scanning floating point numbers.
1693 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1694 information and interfaces for the available integer types.
1696 * about 130 new math functions were added to implement the ISO C9x math
1699 * the new header <complex.h> contains definitions of the complex math
1700 functions from ISO C 9X.
1702 * the new header <tgmath.h> defines generic macros to use complex or
1703 real valued functions.
1705 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1707 * Andreas Jaeger provided a test suite for the math library.
1709 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1711 * Ulrich Drepper added character set conversion functions (iconv).
1713 * Optimized string functions have been added.
1715 * The localedata addon is now part of glibc.
1717 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1719 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1720 daemon for NSS (nscd).
1722 Missing a better place here are some numbers on improvements. Under
1723 Linux 2.1.125 un-tar-ing the kernel sources takes
1727 using local files 12.19s 6.88s 22.91s
1729 using NIS 13.92s 8.91s 26.34s
1731 using NIS & nscd 10.37s 7.34s 25.30s
1733 using NIS+ 27.57s 30.37s 640.46s
1735 using NIS+ & nscd 10.25s 7.83s 26.51s
1737 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1739 Keep in mind that non-namelookup related operations dominate above times.
1740 It was just a common complain that using NIS+ unpacking the kernel is
1743 [1] The old nscd implementation is not available anymore since it was
1744 distributed with glibc up to version 2.0.98 and thus is now replaced.
1746 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1748 * Mark Kettenis provided a Hesiod NSS module.
1750 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1751 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1753 * rcmd can now handle netgroups (Dick Streefland).
1755 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1758 * Support for the IPv6 protocol has been added to the socket API, as per the
1759 latest draft standards.
1761 * Support for Linux 2.2 has been added.
1763 * Interface changes relative to the latest 2.0.x release:
1764 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1765 addseverity NEW: Unix98
1766 alphasort64 NEW: LFS
1767 argp_err_exit_status NEW: argp, GNU ext
1768 argp_error NEW: argp, GNU ext
1769 argp_failure NEW: argp, GNU ext
1770 argp_help NEW: argp, GNU ext
1771 argp_parse NEW: argp, GNU ext
1772 argp_program_bug_address NEW: argp, GNU ext
1773 argp_program_version NEW: argp, GNU ext
1774 argp_program_version_hook NEW: argp, GNU ext
1775 argp_state_help NEW: argp, GNU ext
1776 argp_usage NEW: argp, GNU ext
1777 authdes_create NEW: Secure RPC
1778 authdes_getucred NEW: Secure RPC
1779 authdes_pk_create NEW: Secure RPC
1780 backtrace NEW: GNU ext.
1781 backtrace_symbols NEW: GNU ext.
1782 backtrace_symbols_fd NEW: GNU ext.
1784 cacosf NEW: ISO C 9x
1785 cacosh NEW: ISO C 9x
1786 cacoshf NEW: ISO C 9x
1787 cacoshl NEW: ISO C 9x
1788 cacosl NEW: ISO C 9x
1795 casinf NEW: ISO C 9x
1796 casinh NEW: ISO C 9x
1797 casinhf NEW: ISO C 9x
1798 casinhl NEW: ISO C 9x
1799 casinl NEW: ISO C 9x
1801 catanf NEW: ISO C 9x
1802 catanh NEW: ISO C 9x
1803 catanhf NEW: ISO C 9x
1804 catanhl NEW: ISO C 9x
1805 catanl NEW: ISO C 9x
1806 cbc_crypt NEW: Secure RPC
1810 ccoshf NEW: ISO C 9x
1811 ccoshl NEW: ISO C 9x
1817 cimagf NEW: ISO C 9x
1818 cimagl NEW: ISO C 9x
1819 clearerr_locked REMOVED
1820 clntunix_create NEW: sunrpc ext
1822 clog10 NEW: ISO C 9x
1823 clog10f NEW: ISO C 9x
1824 clog10l NEW: ISO C 9x
1834 cprojf NEW: ISO C 9x
1835 cprojl NEW: ISO C 9x
1837 crealf NEW: ISO C 9x
1838 creall NEW: ISO C 9x
1843 csinhf NEW: ISO C 9x
1844 csinhl NEW: ISO C 9x
1847 csqrtf NEW: ISO C 9x
1848 csqrtl NEW: ISO C 9x
1852 ctanhf NEW: ISO C 9x
1853 ctanhl NEW: ISO C 9x
1855 des_setparity NEW: Secure RPC
1856 ecb_crypt NEW: Secure RPC
1857 endutxent NEW: Unix98
1859 exp10f NEW: ISO C 9x
1860 exp10l NEW: ISO C 9x
1864 fattach NEW: STREAMS
1865 fdetach NEW: STREAMS
1869 feclearexcept NEW: ISO C 9x
1870 fegetenv NEW: ISO C 9x
1871 fegetexceptflag NEW: ISO C 9x
1872 fegetround NEW: ISO C 9x
1873 feholdexcept NEW: ISO C 9x
1875 feraiseexcept NEW: ISO C 9x
1876 ferror_locked REMOVED
1877 fesetenv NEW: ISO C 9x
1878 fesetexceptflag NEW: ISO C 9x
1879 fesetround NEW: ISO C 9x
1880 fetestexcept NEW: ISO C 9x
1881 feupdateenv NEW: ISO C 9x
1882 fflush_locked REMOVED
1886 fgets_unlocked NEW: GNU ext.
1887 fileno_locked REMOVED
1899 fputc_locked REMOVED
1900 fputs_unlocked NEW: GNU ext.
1901 fread_unlocked NEW: GNU ext.
1906 fstatvfs NEW: Unix98
1910 ftruncate64 NEW: LFS
1912 fwrite_unlocked NEW: GNU ext.
1913 gai_strerror NEW: IPv6
1917 getchar_locked REMOVED
1919 getdate_err NEW: Unix98
1920 getdate_r NEW: GNU ext.
1922 getnameinfo NEW: IPv6
1923 getnetname NEW: Secure RPC
1924 getpmsg NEW: STREAMS
1925 getpt NEW: Unix98 PTY
1926 getrlimit64 NEW: LFS
1927 getutxent NEW: Unix98
1928 getutxid NEW: Unix98
1929 getutxline NEW: Unix98
1930 glob64 NEW: GNU ext.
1931 globfree64 NEW: GNU ext.
1932 gnu_get_libc_release NEW: GNU ext.
1933 gnu_get_libc_version NEW: GNU ext.
1934 grantpt NEW: Unix98 PTY
1935 host2netname NEW: Secure RPC
1937 iconv_close NEW: iconv
1938 iconv_open NEW: iconv
1939 if_freenameindex NEW: IPv6
1940 if_indextoname NEW: IPv6
1941 if_nameindex NEW: IPv6
1942 if_nametoindex NEW: IPv6
1943 in6addr_any NEW: IPv6
1944 in6addr_loopback NEW: IPv6
1945 inet6_isipv4mapped NEW: IPv6
1946 isastream NEW: STREAMS
1947 iswblank NEW: GNU ext.
1948 key_decryptsession NEW: Secure RPC
1949 key_decryptsession_pk NEW: Secure RPC
1950 key_encryptsession NEW: Secure RPC
1951 key_encryptsession_pk NEW: Secure RPC
1952 key_gendes NEW: Secure RPC
1953 key_get_conv NEW: Secure RPC
1954 key_secretkey_is_set NEW: Secure RPC
1955 key_setnet NEW: Secure RPC
1956 key_setsecret NEW: Secure RPC
1957 llrint NEW: ISO C 9x
1958 llrintf NEW: ISO C 9x
1959 llrintl NEW: ISO C 9x
1960 llround NEW: ISO C 9x
1961 llroundf NEW: ISO C 9x
1962 llroundl NEW: ISO C 9x
1967 lrintf NEW: ISO C 9x
1968 lrintl NEW: ISO C 9x
1969 lround NEW: ISO C 9x
1970 lroundf NEW: ISO C 9x
1971 lroundl NEW: ISO C 9x
1973 makecontext NEW: Unix98
1974 mempcpy NEW: GNU ext.
1977 modify_ldt NEW: kernel
1981 nearbyint NEW: ISO C 9x
1982 nearbyintf NEW: ISO C 9x
1983 nearbyintl NEW: ISO C 9x
1984 netname2host NEW: Secure RPC
1985 netname2user NEW: Secure RPC
1986 nexttoward NEW: ISO C 9x
1987 nexttowardf NEW: ISO C 9x
1988 nexttowardl NEW: ISO C 9x
1992 passwd2des NEW: Secure RPC
1994 pow10f NEW: GNU ext.
1995 pow10l NEW: GNU ext.
1998 printf_size NEW: GNU ext.
1999 printf_size_info NEW: GNU ext.
2000 profil_counter REMOVED
2001 pthread_mutexattr_getkind_np REPLACED
2002 pthread_mutexattr_setkind_np REPLACED
2003 ptsname NEW: Unix98 PTY
2004 ptsname_r NEW: Unix98 PTY
2006 putchar_locked REMOVED
2007 putgrent NEW: GNU ext.
2009 putpmsg NEW: STREAMS
2010 pututxline NEW: Unix98
2014 readdir64_r NEW: LFS
2015 remquo NEW: ISO C 9x
2016 remquof NEW: ISO C 9x
2017 remquol NEW: ISO C 9x
2019 roundf NEW: ISO C 9x
2020 roundl NEW: ISO C 9x
2022 scalbln NEW: ISO C 9x
2023 scalblnf NEW: ISO C 9x
2024 scalblnl NEW: ISO C 9x
2026 sendfile NEW: kernel
2027 setcontext NEW: Unix98
2028 setrlimit64 NEW: LFS
2029 setutxent NEW: Unix98
2031 sigignore NEW: Unix98
2032 sigqueue NEW: POSIX.1b
2033 sigrelse NEW: Unix98
2034 sigset NEW: POSIX.1b
2035 sigtimedwait NEW: POSIX.1b
2036 sigwaitinfo NEW: POSIX.1b
2037 sincos NEW: GNU ext.
2038 sincosf NEW: GNU ext.
2039 sincosl NEW: GNU ext.
2043 strcasestr NEW: GNU ext.
2044 strtoimax NEW: ISO C 9x
2045 strtoumax NEW: ISO C 9x
2046 strverscmp NEW: GNU ext.
2047 svcauthdes_stats NEW: Secure RPC
2048 svcunix_create NEW: sunrpc etx
2049 svcunixfd_create NEW: sunrpc ext
2050 swapcontext NEW: Unix98
2051 tcgetsid NEW: Unix98 PTY
2052 tdestroy NEW: GNU ext.
2053 tgamma NEW: ISO C 9x
2054 tgammaf NEW: ISO C 9x
2055 tgammal NEW: ISO C 9x
2059 truncf NEW: ISO C 9x
2060 truncl NEW: ISO C 9x
2062 unlockpt NEW: Unix98 PTY
2063 updwtmpx NEW: Unix98
2064 user2netname NEW: Secure RPC
2065 utmpxname NEW: Unix98
2066 versionsort NEW: GNU ext.
2067 versionsort64 NEW: GNU ext.
2069 wcscasecmp NEW: GNU ext.
2070 wcsncasecmp NEW: GNU ext.
2071 wcsnlen NEW: GNU ext.
2072 wcstoimax NEW: ISO C 9x
2073 wcstoll NEW: ISO C 9x
2074 wcstoull NEW: ISO C 9x
2075 wcstoumax NEW: ISO C 9x
2077 wordexp NEW: POSIX.2
2078 wordfree NEW: POSIX.2
2079 write_profiling REMOVED
2080 xdecrypt NEW: Secure RPC
2081 xdr_authdes_cred NEW: Secure RPC
2082 xdr_authdes_verf NEW: Secure RPC
2083 xdr_cryptkeyarg NEW: Secure RPC
2084 xdr_cryptkeyarg2 NEW: Secure RPC
2085 xdr_cryptkeyres NEW: Secure RPC
2086 xdr_getcredres NEW: Secure RPC
2087 xdr_key_netstarg NEW: Secure RPC
2088 xdr_key_netstres NEW: Secure RPC
2089 xdr_keybuf NEW: Secure RPC
2090 xdr_keystatus NEW: Secure RPC
2091 xdr_netnamestr NEW: Secure RPC
2092 xdr_sizeof NEW: Secure RPC
2093 xdr_unixcred NEW: sunrpc ext
2094 xencrypt NEW: Secure RPC
2095 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2106 * inet_ntoa is thread-safe
2108 * updwtmp is moved from libutil to libc
2110 * rewrite of cbrt function
2112 * update of timezone data
2126 * add atoll function
2128 * fix complex problems in Berkeley DB code
2130 * fix math functions
2134 * fixed lots of header problems (especially Linux/GNU specific)
2136 * dynamic loader preserves all registers
2138 * Roland McGrath provided support for handling of auxiliary objects in
2139 the ELF dynamic loader.
2141 * support for parallel builds is improved
2145 * GNU extensions are no longer declared by default. To enable them you
2146 must define the macro `_GNU_SOURCE' in your program or compile with
2149 * The library has changed from using GNU ld symbol aliases to using weak
2150 symbols where available. The ELF object file format supports weak
2151 symbols; GNU ld also supports weak symbols in the a.out format. (There
2152 is also now support for other GNU ld extensions in ELF. Use the
2153 `--with-elf' option to configure to indicate you have ELF, and
2154 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2155 of many files which contained only symbol aliases, reducing the size of
2156 the source and the compiled library; many other files were renamed to
2157 less cryptic names previously occupied by the symbol alias files.
2158 There is a new header file <elf.h> for programs which operate on
2159 files in the ELF format.
2161 * Converted to Autoconf version 2, so `configure' has more options.
2162 Run `configure --help' to see the details.
2164 * The library can now be configured to build profiling, highly-optimized
2165 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2166 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2167 `configure' enable building these extra libraries. The shared library is
2168 built by default when using both ELF and GNU ld. When shared libraries
2169 are enabled, the new library `-ldl' is available for arbitrary run-time
2170 loading of shared objects; its interface is defined in <dlfcn.h>. The
2171 new header file <link.h> gives access to the internals of the run-time
2172 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2173 application of same name on other systems and it provides information
2174 about dynamically linked binaries.
2176 * The C library now provides the run-time support code for profiling
2177 executables compiled with `-pg'. Programs can control the profiling code
2178 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2179 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2180 the support for this file format was contributed by David Mosberger-Tang.
2182 * The math code has been replaced with a math library based on fdlibm from
2183 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2184 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2185 functions. The math functions now reside in a separate library, so
2186 programs using them will need to use `-lm' their linking commands.
2188 * John C. Bowman contributed optimized ix87 assembler inline functions.
2190 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2191 mechanism similar to that found in Solaris 2. This is now used for the
2192 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2193 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2194 file controls what services are used for each individual database. This
2195 works by loading shared libraries with names specified in `nsswitch.conf',
2196 so service modules can be changed or added at any time without even
2197 relinking any program. Currently there are the file, db, and NIS based
2198 NSS services available.
2200 * The new functions `strtoq' and `strtouq' parse integer values from
2201 strings, like `strtol' and `strtoul', but they return `long long int' and
2202 `unsigned long long int' values, respectively (64-bit quantities).
2204 * The new functions `strtof' and `strtold' parse floating-point values from
2205 strings, like `strtod', but they return `float' and `long double' values,
2206 respectively (on some machines `double' and `long double' are the same).
2208 * Ulrich Drepper has contributed new implementations of the floating-point
2209 printing and reading code used in the `printf' family of functions and
2210 `strtod', `strtof', and `strtold'. These new functions are perfectly
2211 accurate, and much faster than the old ones.
2213 * The implementation of the POSIX locale model was completely rewritten by
2214 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2215 to compile the POSIX locale definition.
2217 * The former dummy implementations of the strcoll and strxfrm function are
2218 now replaced by fully functional code contributed by Ulrich Drepper. The
2219 collation information comes from the POSIX locale definitions.
2221 * The new header <langinfo.h> defines an interface for accessing
2222 various locale-dependent data (using the locale chosen with `setlocale').
2224 * Ulrich Drepper has contributed a new suite of functions for operation on
2225 wide-character and multibyte-character strings, in <wchar.h>;
2226 and classification and case conversion of wide characters, in <wctype.h>.
2227 These new functions are conforming to the ISO C, Amendement 1 specification.
2229 * There is now a second implementation of the standard I/O library available.
2230 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2231 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2233 * You can now use positional parameter specifications in format strings
2234 for the `printf' and `scanf' families of functions. For example,
2235 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2236 ``Number 6, Mr Jones''. This is mainly useful when providing different
2237 format strings for different languages, whose grammars may dictate
2238 different orderings of the values being printed. To support this
2239 feature, the interface for `register_printf_handler' has changed; see
2240 the header file <printf.h> for details.
2242 * The `printf' and `scanf' families of functions now understand a new
2243 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2244 to group numbers as indicated by the locale; for `scanf' and friends, this
2245 says to accept as valid only a number with all the proper grouping
2246 separators in the right places. In the default "C" locale, numbers are
2247 not grouped; but locales for specific countries will define the usual
2248 conventions (i.e. separate thousands with `,' in the US locale).
2250 * The pgrp functions have been regularized, slightly incompatibly but much
2251 less confusingly. The core functions are now `getpgid' and `setpgid',
2252 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2253 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2254 provided for compatibility. There is no longer an incompatible `getpgrp'
2255 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2257 * The new header file <fts.h> and suite of functions simplify programs that
2258 operate on directory trees. This code comes from 4.4 BSD.
2260 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2261 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2262 NSS scheme used in glibc.
2264 * There is a new malloc debugging hook `__memalign_hook'.
2266 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2267 `unsigned int' in <sys/types.h>. These are for compatibility only and
2268 their use is discouraged.
2270 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2271 done differently, so that it works even without GNU ld.
2273 * New function `euidaccess' checks allowed access to a file like `access',
2274 but using the effective IDs instead of the real IDs.
2276 * The time zone data files have been updated for the latest and greatest
2277 local time conventions of the countries of the world.
2279 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2282 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2283 for formatting floating-point numbers. They are provided only for
2284 compatibility; new programs should use `sprintf' instead. There are
2285 also equivalent function for the `long double' floating-point type and
2286 all functions also exist in a reentrant form.
2288 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2289 functions for maintaining the login-record files (primarily of use to
2290 system programs such as `login'), and convenient functions for
2291 allocating and initializing a pseudo-terminal (pty) device.
2293 * Ulrich Drepper has contributed new support for System V style
2294 shared memory and IPC on systems that support it.
2296 * Ulrich Drepper has contributed several miscellaneous new functions found
2297 in System V: The `hsearch' family of functions provide an effective
2298 implementation of hash tables; `a64l' and `l64a' provide a very simple
2299 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2302 * Ulrich Drepper has contributed new reentrant counterparts for the
2303 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2305 * Ulrich Drepper has contributed new, highly-optimized versions of several
2306 string functions for the i486/Pentium family of processors.
2308 * Ulrich Drepper has updated the Linux-specific code, based largely
2309 on work done in Hongjiu Lu's version of GNU libc for Linux.
2310 The GNU library now supports Linux versions 2.0.10 and later,
2311 using the ELF object file format (i[3456]86-*-linux).
2313 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2315 * David Mosberger-Tang and Richard Henderson have ported the C library
2316 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2317 dynamic linking support for ELF/Alpha.
2319 * Richard Henderson contributed several Alpha optimized assembler function
2320 for arithmetic and string handling.
2322 * Ulrich Drepper has contributed a new set of message catalog functions to
2323 support multiple languages using the <libintl.h> interface, for use with
2324 his new package GNU gettext. Translation volunteers have contributed
2325 catalogs of the library's messages in Spanish, German, and Korean.
2327 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2328 program and the `catgets' function for reading the catalog files it
2329 creates. (The <libintl.h> interface is preferred; we include the
2330 <nl_types.h> interface using `catgets' only for source compatibility with
2331 programs already written to use it.)
2333 * New header file <values.h> gives SVID-compatible names for <limits.h>
2336 * Various new macros, declarations, and small header files for compatibility
2339 * New function `group_member' is a convenient way to check if a process has
2340 a given effective group ID.
2342 * When using GCC 2.7 and later, the socket functions are now declared in a
2343 special way so that passing an argument of type `struct sockaddr_in *',
2344 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2345 `struct sockaddr *' type, does not generate a type-clash warning.
2347 * New function `error' declared in header file <error.h> is a convenient
2348 function for printing error messages and optionally exiting; this is the
2349 canonical function used in GNU programs. The new functions `err', `warn',
2350 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2351 doing the same thing.
2353 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2354 POSIX.2 `glob' function to do ~ and {...} expansion.
2356 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2357 `clearenv' which is used in POSIX.9 is also available.
2359 * New function `getsid' returns session ID number on systems that support it.
2361 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2362 files <db.h> and <mpool.h> provide a rich set of functions for several
2363 types of simple databases stored in memory and in files, and <ndbm.h> is
2364 an old `ndbm'-compatible interface using the `db' functions. Link with
2365 `-ldb' to get these functions.
2367 * New macro `strdupa' copies a string like `strdup', but uses local stack
2368 space from `alloca' instead of dynamic heap space from `malloc'.
2370 * New function `strnlen' is like `strlen' but searches only a given maximum
2371 number of characters for the null terminator. `stpncpy', `strndup' and
2372 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2375 * New function `statfs' in header <sys/statfs.h>.
2377 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2378 provide convenient functions for operating on blocks of null-terminated
2381 * A new suite of functions in <utmp.h> handle all the details of reading
2382 and writing the utmp file.
2384 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2387 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2388 completely POSIX compliant and also implemented the extended functionality
2389 to handle alternate digit representation and alternate era date formats.
2391 * Ulrich Drepper provided an implementation of the `strptime' function
2392 defined in XPG4.2 which transforms a string into a `struct tm' value.
2394 * Paul Eggert provided the tzselect shell script as part of the timezone
2395 code. The shell script makes it easy to select the correct timezone
2398 * The implementation of the malloc family of functions is completely replaced
2399 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2400 The implementation uses the mmap function (if available) and it is
2401 optimized for the use in multi threaded programs.
2403 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2404 functions. This new functionality is usable by specifying a special
2405 salt string and it is compatible with implementation on *BSD systems.
2407 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2408 `getsubopt' to handle second level command line options, `bsd_signal'
2409 to access BSD style `signal' functionality, the obsolete `regexp' style
2412 * the `lchown' function is available on system which support this
2415 * The implementation of the shadow password handling function was contributed
2418 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2420 * POSIX.1g support was added. The <sys/select.h> header is available,
2421 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2422 implementation of `getaddrinfo'.
2426 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2428 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2429 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2431 * The new function `daemon' from 4.4 BSD is useful for server programs that
2432 want to put themselves in the background.
2434 * Joel Sherrill has contributed support for several standalone boards that
2435 run without an operating system.
2437 * `printf', `scanf' and friends now accept a `q' type modifier for long
2438 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2440 * All of the code taken from BSD (notably most of the math and networking
2441 routines) has been updated from the BSD 4.4-Lite release.
2443 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2445 * The new functions `getdomainname' and `setdomainname' fetch or change the
2446 YP/NIS domain name. These are system calls which exist on systems which
2449 * The time zone data files have been updated for the latest international
2452 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2453 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2457 * The C library now includes support for Sun RPC, from Sun's free
2458 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2459 are included. (There is still no support for YP.)
2461 * Tom Quinn has contributed a port of the C library to SGI machines running
2462 Irix 4 (mips-sgi-irix4).
2464 * The new `lockf' function is a simplified interface to the locking
2465 facilities of `fcntl', included for compatibility.
2467 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2469 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2471 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2474 * The error message printed by `assert' for a failed assertion now includes
2475 the name of the program (if using GNU ld) and the name of the calling
2476 function (with versions of GCC that support this).
2478 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2480 * The library now includes the <sys/mman.h> header file and memory
2481 management functions `mmap', `munmap', `mprotect', `msync', and
2482 `madvise', on systems that support those facilities.
2484 * The interface for `mcheck' has changed slightly: the function called to
2485 abort the program when an allocation inconsistency is detected now takes
2486 an argument that indicates the type of failure. The new function
2487 `mprobe' lets you request a consistency check for a particular block at
2488 any time (checks are normally done only when you call `free' or `realloc'
2491 * It is now possible to easily cross-compile the C library, building on one
2492 system a library to run on another machine and/or operating system. All
2493 you need to do is set the variable `HOST_CC' in `configparms' to the
2494 native compiler for programs to run on the machine you are building on (a
2495 few generator programs are used on Unix systems); set `CC' to the
2498 * The new function `fexecve' (only implemented on the GNU system) executes
2499 a program file given a file descriptor already open on the file.
2503 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2504 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2506 * You can set the variable `libprefix' in `configparms' to specify a prefix
2507 to be prepended to installed library files; this makes it easy to install
2508 the GNU C library to be linked as `-lgnuc' or whatever.
2510 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2511 copies a limited number of characters from a string, and returns the
2512 address of the last character written.
2514 * You no longer need to check for whether the installed `stddef.h' is
2515 compatible with the GNU C library. configure now checks for you.
2517 * You can now define a per-stream `fileno' function to convert the
2518 stream's cookie into an integral file descriptor.
2520 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2521 allocates zero bytes of storage, and returns a unique pointer which
2522 you can pass to `realloc' or `free'. The behavior is undefined if
2523 you dereference this pointer.
2525 * The C library now runs on Sony NEWS m68k machines running either
2526 NewsOS 3 or NewsOS 4.
2528 * The new `syscall' function is a system-dependent primitive function
2529 for invoking system calls. It has the canonical behavior on Unix
2530 systems, including unreliable return values for some calls (such as
2531 `pipe', `fork' and `getppid').
2533 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2534 to `EAGAIN', which is the preferred name. On systems whose kernels
2535 use two distinct codes, the C library now translates EWOULDBLOCK to
2536 EAGAIN in every system call function.
2540 * The GNU C Library Reference Manual is now distributed with the library.
2541 `make dvi' will produce a DVI file of the printed manual.
2542 `make info' will produce Info files that you can read on line using C-h i
2543 in Emacs or the `info' program.
2544 Please send comments on the manual to bug-glibc-manual@gnu.org.
2546 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2548 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2550 * Jason Merrill has contributed a port to the Sequent Symmetry running
2551 Dynix version 3 (i386-sequent-dynix).
2553 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2554 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2556 * New function `memory_warnings' lets you arrange to get warnings when
2557 malloc is running out of memory to allocate, like Emacs gives you.
2559 * The C library now contains the relocating allocator used in Emacs 19 for
2560 its editing buffers. This allocator (ralloc) minimizes allocation
2561 overhead and fragmentation by moving allocated regions around whenever it
2562 needs to. You always refer to a ralloc'd region with a "handle" (a
2563 pointer to a pointer--an object of type `void **').
2565 * There is a new `printf' format: `%m' gives you the string corresponding
2566 to the error code in `errno'.
2568 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2569 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2570 pass, the `a' modifier says to fill in a `char **' you pass with a
2573 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2574 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2575 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2577 * `mkstemp' is a traditional Unix function to atomically create and open a
2578 uniquely-named temporary file.
2582 * The standard location for the file that says what the local timezone is
2583 has changed again. It is now `/usr/local/etc/localtime' (or more
2584 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2586 * The distribution no longer contains any files with names longer than 14
2589 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2590 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2592 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2596 * The configuration process has changed quite a bit. The `configure'
2597 script is now used just like the configuration scripts for other GNU
2598 packages. The `sysdeps' directory hierarchy is much rearranged.
2599 The file `INSTALL' explains the new scheme in detail.
2601 * The header files no longer need to be processed into ANSI C and
2602 traditional C versions. There is just one set of files to install, and
2603 it will work with ANSI or old C compilers (including `gcc -traditional').
2605 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2606 MIPS DECStation running Ultrix 4.
2608 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2609 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2610 made itself into a shared library.
2612 * Yet further improved support for the i386, running 4.3 BSD-like systems
2613 (such as Mach 3 with the Unix single-server), or System V.
2615 * New function `strncasecmp' to do case-insensitive string comparison
2616 with limited length.
2618 * New function `strsep' is a reentrant alternative to `strtok'.
2620 * New functions `scandir' and `alphasort' for searching directories.
2622 * New function `setenv' is a better interface to `putenv'.
2624 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2625 function for traversing a directory tree.
2627 * The GNU obstack package is now also part of the C library.
2628 The new function `open_obstack_stream' creates a stdio stream that
2629 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2630 formatted output directly to an obstack.
2632 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2633 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2635 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2637 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2638 things to your strings.
2640 * There are some new test programs: test-fseek, testmb, and testrand.
2642 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2643 These ports are not finished, but are a good starting place for really
2644 supporting those systems.
2646 * `/etc/localtime' is now the standard location for the file that says what
2647 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2648 This follows the general principle that `/etc' is the place for all local
2649 configuration files.
2651 * The C library header files now use `extern "C"' when used by the C++
2652 compiler, so the C library should now work with C++ code.
2654 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2655 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2658 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2659 function which uses the `merge sort' algorithm, and is said to be
2660 significantly faster than the old GNU `qsort' function. Merge sort is
2661 now the standard `qsort' function. The new algorithm can require a lot
2662 of temporary storage; so, the old sorting function is called when the
2663 required storage is not available.
2665 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2666 provides the Unix `crypt' function, plus some other entry points.
2668 * The code and header files taken from 4.4 BSD have been updated with the
2669 latest files released from Berkeley.
2671 ----------------------------------------------------------------------
2672 Copyright information:
2674 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2676 Permission is granted to anyone to make or distribute verbatim copies
2677 of this document as received, in any medium, provided that the
2678 copyright notice and this permission notice are preserved,
2679 thus giving the recipient permission to redistribute in turn.
2681 Permission is granted to distribute modified versions
2682 of this document, or of portions of it,
2683 under the above conditions, provided also that they
2684 carry prominent notices stating who last changed them.
2687 version-control: never