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:
12 887, 2542, 2543, 2558, 2898, 4404, 6803, 10432, 14341, 14912, 15367,
13 15384, 15470, 15786, 15918, 16141, 16296, 16347, 16399, 16415, 16517,
14 16519, 16520, 16521, 16620, 16734, 16973, 16985, 17118, 17243, 17244,
15 17250, 17441, 17787, 17886, 17887, 17905, 18084, 18086, 18240, 18265,
16 18370, 18421, 18480, 18525, 18595, 18589, 18610, 18618, 18647, 18661,
17 18674, 18675, 18681, 18724, 18757, 18778, 18781, 18787, 18789, 18790,
18 18795, 18796, 18803, 18820, 18823, 18824, 18825, 18857, 18863, 18870,
19 18872, 18873, 18875, 18887, 18921, 18951, 18952, 18956, 18961, 18966,
20 18967, 18969, 18970, 18977, 18980, 18981, 18985, 19003, 19012, 19016,
21 19018, 19032, 19046, 19049, 19050, 19059, 19071, 19076, 19077, 19078,
22 19079, 19085, 19086, 19088, 19094, 19095.
24 * The obsolete header <regexp.h> has been removed. Programs that require
25 this header must be updated to use <regex.h> instead.
27 * Optimized string, wcsmbs and memory functions for IBM z13.
28 Implemented by Stefan Liebler.
32 * The following bugs are resolved with this release:
34 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
35 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
36 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
37 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
38 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
39 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
40 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
41 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
42 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
43 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
44 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
45 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
46 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
47 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
48 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
49 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
50 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
51 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
52 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
53 18657, 18676, 18694, 18696, 18887.
55 * Cache information can be queried via sysconf() function on s390 e.g. with
56 _SC_LEVEL1_ICACHE_SIZE as argument.
58 * A buffer overflow in gethostbyname_r and related functions performing DNS
59 requests has been fixed. If the NSS functions were called with a
60 misaligned buffer, the buffer length change due to pointer alignment was
61 not taken into account. This could result in application crashes or,
62 potentially arbitrary code execution, using crafted, but syntactically
63 valid DNS responses. (CVE-2015-1781)
65 * The time zone file parser has been made more robust against crafted time
66 zone files, avoiding heap buffer overflows related to the processing of
67 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
68 large time zone data files. Overly long time zone specifiers in the TZ
69 variable no longer result in stack overflows and crashes.
71 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
72 for LD and GD on x86 and x86-64, has been implemented. You will need
73 binutils-2.24 or later to enable this optimization.
75 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
76 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
77 Hat). These updates cause user visible changes, such as the fix for bug
80 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
81 and getXXbyYY NSS calls for the same database, causing a denial-of-service
82 condition in some applications.
84 * Added vector math library named libmvec with the following vectorized x86_64
85 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
87 The library can be disabled with --disable-mathvec. Use of the functions is
88 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
89 Shared library libmvec.so is linked in as needed when using -lm (no need to
90 specify -lmvec explicitly for not static builds).
91 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
93 * A new fmemopen implementation has been added with the goal of POSIX
94 compliance. The new implementation fixes the following long-standing
95 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
96 old implementation is still present for use be by existing binaries.
98 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
99 releases. It has been fixed to match 2.19 and older, but binaries built
100 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
102 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
103 Contributed by Roland McGrath (Google).
105 * The header <regexp.h> is deprecated, and will be removed in a future
106 release. Use of this header will trigger a deprecation warning.
107 Application developers should update their code to use <regex.h> instead.
109 This header was formerly part of SUS, but was deprecated in 1994 and
110 removed from the standard in 2001. Also, the glibc implementation
111 leaks memory. See BZ#18681 for more details.
115 * The following bugs are resolved with this release:
117 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
118 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
119 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
120 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
121 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
122 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
123 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
124 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
125 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
126 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
129 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
130 too little memory for the to-be-scanned arguments and overflow the
131 allocated buffer. The implementation now correctly computes the required
132 buffer size when using malloc, and switches to malloc from alloca as
135 * A new semaphore algorithm has been implemented in generic C code for all
136 machines. Previous custom assembly implementations of semaphore were
137 difficult to reason about or ensure that they were safe. The new version
138 of semaphore supports machines with 64-bit or 32-bit atomic operations.
139 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
140 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
142 * Port to Altera Nios II has been contributed by Mentor Graphics.
144 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
145 implementations for powerpc64/powerpc64le.
146 Implemented by Adhemerval Zanella (IBM).
148 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
149 and powerpc64le. This may improve lock scaling of existing programs on
150 HTM capable systems. The lock elision code is only enabled with
151 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
152 powerpc will issue a transaction abort on every syscall to avoid side
153 effects being visible outside transactions.
155 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
156 AArch64. Contributed by ARM Ltd.
158 * i386 memcpy functions optimized with SSE2 unaligned load/store.
160 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
161 under certain input conditions resulting in the execution of a shell for
162 command substitution when the application did not request it. The
163 implementation now checks WRDE_NOCMD immediately before executing the
164 shell and returns the error WRDE_CMDSUB as expected.
166 * CVE-2012-3406 printf-style functions could run into a stack overflow when
167 processing format strings with a large number of format specifiers.
169 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
170 infinite loop if the DNS response contained a PTR record of an unexpected
173 * The minimum GCC version that can be used to build this version of the GNU
174 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
175 still be used to compile programs using the GNU C Library.
177 * The GNU C Library is now built with -Werror by default. This can be
178 disabled by configuring with --disable-werror.
180 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
182 * The obsolete sigvec function has been removed. This was the original
183 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
184 programs have been using instead for about 25 years. Of course, ABI
185 compatibility for old binaries using sigvec remains intact.
187 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
188 with newer versions of bison.
190 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
191 The original MIPS o32 hard-float ABI requires an FPU where double-precision
192 registers overlay two consecutive single-precision registers. MIPS32R2
193 introduced a new FPU mode (FR=1) where double-precision registers extend the
194 corresponding single-precision registers which is incompatible with the
195 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
196 require the use of FR=1 making a transition necessary. New o32 ABI
197 extensions enable users to migrate over time from the original o32 ABI
198 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
199 tracks the ABI of any loaded object and verifies that new objects are
200 compatible. Mode transitions will also be requested as required and
201 unsupportable objects will be rejected. The ABI checks include both soft and
202 hard float ABIs for o32, n32 and n64.
204 GCC 5 with GNU binutils 2.25 onwards:
205 It is strongly recommended that all o32 system libraries are built using the
206 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
207 with the original and all new o32 ABI extensions. Configure a MIPS GCC
208 compiler using --with-fp-32=xx to set this by default.
212 * The following bugs are resolved with this release:
214 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
215 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
216 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
217 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
218 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
219 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
220 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
221 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
222 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
223 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
224 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
225 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
226 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
227 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
228 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
230 * Reverted change of ABI data structures for s390 and s390x:
231 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
232 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
233 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
234 are preserved pointing straight to the same implementation as the old ones.
235 Given that, new callers will simply provide a too-big buffer to these
236 functions. Any applications/libraries out there that embed jmp_buf or
237 ucontext_t in an ABI-relevant data structure that have already been rebuilt
238 against 2.19 headers will have to rebuilt again. This is necessary in any
239 case to revert the breakage in their ABI caused by the glibc change.
241 * Support for file description locks is added to systems running the
242 Linux kernel. The standard file locking interfaces are extended to
243 operate on file descriptions, not file descriptors, via the use of
244 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
245 are associated with an open file instead of a process.
247 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
249 * The minimum Linux kernel version that this version of the GNU C Library
250 can be used with is 2.6.32.
252 * Running the testsuite no longer terminates as soon as a test fails.
253 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
254 with PASS or FAIL lines for individual tests. A summary of the results is
255 printed, including a list of failing lists, and "make check" exits with
256 error status if there were any unexpected failures. "make check
257 stop-on-test-failure=y" may be used to keep the old behavior.
259 * The am33 port, which had not worked for several years, has been removed
262 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
263 supported; they now act the same as _DEFAULT_SOURCE (but generate a
264 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
265 conflicted with POSIX (support for which was removed in 2.19), the
266 interfaces those macros enabled remain available when compiling with
267 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
270 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
272 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
273 This may improve lock scaling of existing programs on TX capable systems.
274 The lock elision code is only built with --enable-lock-elision=yes and
275 then requires a GCC version supporting the TX builtins. With lock elision
276 default mutexes are elided via __builtin_tbegin, if the cpu supports
277 transactions. By default lock elision is not enabled and the elision code
280 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
281 copy the path argument. This allowed programs to cause posix_spawn to
282 deference a dangling pointer, or use an unexpected pathname argument if
283 the string was modified after the posix_spawn_file_actions_addopen
286 * All supported architectures now use the main glibc sysdeps directory
287 instead of some being in a separate "ports" directory (which was
288 distributed separately before glibc 2.17).
290 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
291 On configurations that support it (all Linux configurations), it's now
292 used regardless of the --enable-add-ons switch to configure. It is no
293 longer possible to build such configurations without pthreads support.
295 * Locale names, including those obtained from environment variables (LANG
296 and the LC_* variables), are more tightly checked for proper syntax.
297 setlocale will now fail (with EINVAL) for locale names that are overly
298 long, contain slashes without starting with a slash, or contain ".." path
299 components. (CVE-2014-0475) Previously, some valid locale names were
300 silently replaced with the "C" locale when running in AT_SECURE mode
301 (e.g., in a SUID program). This is no longer necessary because of the
304 * On x86-64, the dynamic linker's lazy-binding support is now compatible
305 with application code using Intel MPX instructions. (With all previous
306 versions, the MPX register state could be clobbered when making calls
307 into or out of a shared library.) Note that while the new dynamic
308 linker is compatible with all known x86 hardware whether or not it
309 supports Intel MPX, some x86 instruction-set emulators might fail to
310 handle the new instruction encodings. This is known to affect Valgrind
311 versions up through 3.9 (but will be fixed in the forthcoming 3.10
312 release), and might affect other tools that do instruction emulation.
314 * Support for loadable gconv transliteration modules has been removed.
315 The support for transliteration modules has been non-functional for
316 over a decade, and the removal is prompted by security defects. The
317 normal gconv conversion modules are still supported. Transliteration
318 with //TRANSLIT is still possible, and the //IGNORE specifier
319 continues to be supported. (CVE-2014-5119)
321 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
322 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
323 resulting a denial-of-service security vulnerability in applications which
324 use functions related to iconv. (CVE-2014-6040)
328 * The following bugs are resolved with this release:
330 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
331 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
332 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
333 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
334 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
335 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
336 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
337 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
338 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
339 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
340 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
341 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
342 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
343 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
344 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
345 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
346 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
347 16431, 16453, 16474, 16506, 16510, 16529
349 * Slovenian translations for glibc messages have been contributed by the
350 Translation Project's Slovenian team of translators.
352 * The public headers no longer use __unused nor __block. This change is to
353 support compiling programs that are derived from BSD sources and use
354 __unused internally, and to support compiling with Clang's -fblock
355 extension which uses __block.
357 * CVE-2012-4412 The strcoll implementation caches indices and rules for
358 large collation sequences to optimize multiple passes. This cache
359 computation may overflow for large collation sequences and may cause a
360 stack or buffer overflow. This is now fixed to use a slower algorithm
361 which does not use a cache if there is an integer overflow.
363 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
364 rules for large collation sequences to optimize multiple passes and falls
365 back to alloca if malloc fails, resulting in a possible stack overflow.
366 The implementation now falls back to an uncached collation sequence lookup
369 * CVE-2013-4788 The pointer guard used for pointer mangling was not
370 initialized for static applications resulting in the security feature
371 being disabled. The pointer guard is now correctly initialized to a
372 random value for static applications. Existing static applications need
373 to be recompiled to take advantage of the fix (bug 15754).
375 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
376 to the d_name member of struct dirent, or omit the terminating NUL
377 character. (Bugzilla #14699).
379 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
380 aligned_alloc functions could allocate too few bytes or corrupt the
381 heap when passed very large allocation size values (Bugzilla #15855,
384 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
385 for AF_INET6 has been fixed (Bugzilla #16072).
387 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
388 pap_CW, quz_PE, the_NP.
390 * Substantially revised locales: gd_GB, ht_HT
392 * The LC_ADDRESS field was updated to support country_car for almost all
395 * ISO 1427 definitions were updated.
397 * ISO 3166 definitions were updated.
399 * The localedef utility now supports --big-endian and --little-endian
400 command-line options to generate locales for a different system from that
401 for which the C library was built.
403 * Binary locale files now only depend on the endianness of the system for
404 which they are generated and not on other properties of that system. As a
405 consequence, binary files generated with new localedef may be incompatible
406 with old versions of the GNU C Library, and binary files generated with
407 old localedef may be incompatible with this version of the GNU C Library,
408 in the following circumstances:
410 + Locale files may be incompatible on m68k systems.
412 + Locale archive files (but not separate files for individual locales) may
413 be incompatible on systems where plain "char" is signed.
415 * The configure option --disable-versioning has been removed. Builds with
416 --disable-versioning had not worked for several years.
418 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
419 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
421 * SystemTap probes for malloc have been introduced.
423 * SystemTap probes for slow multiple precision fallback paths of
424 transcendental functions have been introduced.
426 * Support for powerpc64le has been added.
428 * The soft-float powerpc port now supports e500 processors.
430 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
432 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
433 set of header declarations that are enabled by default, even when other
434 feature test macros or compiler options such as -std=c99 would otherwise
435 disable some of those declarations.
437 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
438 conflict with POSIX. The libbsd-compat library (which was a dummy library
439 that did nothing) has also been removed.
441 * Preliminary documentation about Multi-Thread, Async-Signal and
442 Async-Cancel Safety has been added.
444 * Change of ABI data structures for s390 and s390x:
445 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
446 allow for future hardware extensions. All library functions that accept or
447 return these structures were versioned in order to provide backwards
448 compatibility with existing code. However, not all cases can be handled
449 with interface versioning. If an application embeds either structure into
450 another structure and that structure is passed to another compilation unit
451 which expects the newer larger-sized object then any access to the new
452 fields will result in undefined behaviour. Similarly any access to fields
453 that were moved by the enlarging of the structures will cause undefined
454 behaviour. To fix the undefined behaviour all objects that are part of the
455 final in-memory image must agree on the size of structures, and this may
456 require recompilation.
460 * The following bugs are resolved with this release:
462 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
463 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
464 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
465 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
466 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
467 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
468 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
469 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
470 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
471 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
472 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
473 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
474 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
477 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
478 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
479 Distributions can re-enable building and using pt_chown via the new configure
480 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
481 considerable security risks and should only be used if the distribution
482 understands and accepts the risks.
484 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
487 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
488 fixed (Bugzilla #15330).
490 * Add support for calling C++11 thread_local object destructors on thread
491 and program exit. This needs compiler support for offloading C++11
492 destructor calls to glibc.
494 * Improved worst case performance of libm functions with double inputs and
497 * Support for priority inherited mutexes in pthread condition variables on
498 non-x86 architectures.
500 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
502 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
504 * Optimized string functions for ARM. Implemented by Will Newton and
507 * Optimized libm functions for SPARC. Implemented by David S. Miller.
509 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
512 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
513 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
515 * Added a benchmark framework to track performance of functions in glibc.
517 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
518 It is based on draft TS 18661 and currently enabled as a GNU extension.
520 * On Linux, the clock function now uses the clock_gettime system call
521 for improved precision, rather than old times system call.
523 * Added support for version-3 tz format files. This is needed when using
524 the tz database release 2013e or later, and affects a few unusual cases --
525 currently only TZ='America/Godthab' for time stamps after 2037.
527 * Added new API functions pthread_getattr_default_np and
528 pthread_setattr_default_np to get and set the default pthread
529 attributes of a process.
531 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
532 This may improve lock scaling of existing programs on TSX capable systems.
533 When the --enable-lock-elision=yes parameter is specified at configure
534 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
537 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
538 availability). Implemented by Ryan S. Arnold.
540 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
544 * The following bugs are resolved with this release:
546 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
547 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
548 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
549 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
550 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
551 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
552 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
553 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
554 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
555 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
556 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
557 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
558 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
559 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
560 14879, 14889, 14893, 14898, 14914.
562 * Optimization of memcpy for MIPS.
564 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
565 EMFILE has been fixed (Bugzilla #14889).
567 * The add-on ports collection is now distributed in the "ports" subdirectory
568 of the main GNU C Library distribution, rather than separately.
570 * Port to ARM AArch64 contributed by Linaro.
572 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
573 Optimized versions of memcpy, memset, and memcmp added for System z10 and
575 Implemented by Andreas Krebbel.
577 * The new function secure_getenv allows secure access to the environment,
578 returning NULL if running in a SUID/SGID process. This function replaces
579 the internal function __secure_getenv.
581 * SystemTap static probes have been added into the dynamic linker.
582 Implemented by Gary Benson.
584 * Optimizations of string functions strstr, strcasestr and memmem.
585 Implemented by Maxim Kuvyrkov.
587 * The minimum Linux kernel version that this version of the GNU C Library
588 can be used with is 2.6.16.
590 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
591 powerpc POWER7. Implemented by Will Schmidt.
593 * New configure option --disable-nscd builds the C library such that it
594 never attempts to contact the Name Service Caching Daemon (nscd).
595 New configure option --disable-build-nscd avoids building nscd itself;
596 this is the default if --disable-nscd is used.
598 * Improved support for cross-compilation, including cross-testing and
599 bootstrap builds without a previously built glibc.
601 * Several testsuite tests are now able to test multiple IFUNC variants of an
602 interface, rather than just testing the one that would be chooen by
605 * New configure options --with-bugurl and --with-pkgversion, for
606 distributors to use to embed their bug-reporting and package version
607 information in --help and --version output.
609 * The ttyname and ttyname_r functions on Linux now fall back to searching for
610 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
611 allows creation of chroots without the procfs mounted on /proc.
613 * The `crypt' function now fails if passed salt bytes that violate the
614 specification for those values. On Linux, the `crypt' function will
615 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
616 enabled, and fail on encrypted strings using the MD5 or DES algorithm
617 when the mode is enabled.
619 * The `clock_*' suite of functions (declared in <time.h>) is now available
620 directly in the main C library. Previously it was necessary to link with
621 -lrt to use these functions. This change has the effect that a
622 single-threaded program that uses a function such as `clock_gettime' (and
623 is not linked with -lrt) will no longer implicitly load the pthreads
624 library at runtime and so will not suffer the overheads associated with
625 multi-thread support in other code such as the C++ runtime library.
627 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
632 * The following bugs are resolved with this release:
634 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
635 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
636 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
637 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
638 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
639 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
640 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
641 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
642 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
643 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
644 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
645 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
646 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
647 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
648 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
649 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
650 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
651 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
652 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
653 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
654 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
655 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
658 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
659 configuring glibc with:
660 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
661 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
662 Implemented by H.J. Lu.
666 + define static_assert
668 + do not declare gets
670 + declare at_quick_exit and quick_exit also for ISO C11
672 + aligned_alloc. NB: The code is deliberately allows the size parameter
673 to not be a multiple of the alignment. This is a moronic requirement
674 in the standard but it is only a requirement on the caller, not the
679 + uchar.h support added
681 + CMPLX, CMPLXF, CMPLXL added
683 Implemented by Ulrich Drepper.
685 * Support for the IA-64 has been moved to ports.
687 * Remove support for anything but ELF binary format
689 * Checking versions of poll, ppoll added.
690 Implemented by Ulrich Drepper.
692 * More generic and 64-bit performance optimizations to math functions.
693 Implemented by Ulrich Drepper.
695 * New configure option --enable-obsolete-rpc makes the deprecated RPC
696 headers and functions available at compile time as they were before
697 version 2.14. This option will be removed at some time in the future
698 after the TI-RPC library becomes fully sufficient for the needs of
699 existing applications.
701 * Compatibility code for Linux kernel versions before 2.4 has been removed.
702 Note that glibc is not expected to work with any Linux kernel version
705 * New header <sys/auxv.h> and function getauxval allowing easy access to
706 the AT_* key-value pairs passed from the Linux kernel. The header also
707 defines the HWCAP_* bits associated with the AT_HWCAP key.
709 * New locales: mag_IN
711 * New configure option --enable-systemtap builds SystemTap static probes
712 into libc for setjmp and longjmp and into libpthread for various operations.
713 So far the setjmp/longjmp probes and some of the libpthread probes are
714 provided only for i*86 and x86_64.
715 Implemented by Roland McGrath and Rayson Ho.
717 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
719 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
722 * More optimized functions for SPARC. Implemented by David S. Miller.
724 * Improved support for cross-compilation, especially bootstrap builds
725 without a previously built glibc.
727 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
728 Chris Metcalf from Tilera.
730 * Support for the old ARM ABI has been removed from ports. Only the EABI is
731 now supported for ARM processors.
733 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
734 as the name of the dynamic linker, to distinguish it from the
735 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
737 * Support for CRIS has been removed from ports.
739 * A new class of installed header has been documented for low-level
740 platform-specific functionality. PowerPC added the first instance with a
741 function to provide time base register access. Contributed by Tulio
742 Magno Quites Machado Filho.
744 * ix86 configurations now install header files that are consistent with
745 what x86-64 configurations install. These same header files can be used
746 for -m32, -m64, or -mx32 builds.
747 Contributed by H.J. Lu.
749 * Math library bug fixes. A thorough audit of all open math library bugs was
750 conducted by Joseph Myers. Significant progress was made on many math
751 library bugs resulting in more accurate exceptions and function results.
752 Many thanks to all those that contributed including Andreas Jaeger for his
753 patch review and work on the x87 trigonometric instruction issues.
755 * Timezone data is no longer installed. Timezone-related binaries and scripts
756 will continue to be installed. Users should obtain their timezone data from
757 their distribution provider or from the tzdata package at
758 <ftp://munnari.oz.au/pub/>.
762 * The following bugs are resolved with this release:
764 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
765 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
766 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
767 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
768 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
769 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
770 13484, 13506, 13515, 13523, 13524, 13538, 13540
772 * New program pldd to list loaded object of a process
773 Implemented by Ulrich Drepper.
775 * Add nss_db support back to glibc. No more dependency on Berkeley db
776 and support for initgroups lookups.
777 Implemented by Ulrich Drepper.
779 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
780 Contributed by HJ Lu.
782 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
783 Contributed by HJ Lu.
785 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
786 on x86-32 and x86-64.
787 Contributed by Liubov Dmitrieva.
789 * Optimized strchr and strrchr for SSE on x86-32.
790 Contributed by Liubov Dmitrieva.
792 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
793 for x86-64 and x86-32.
794 Contributed by Liubov Dmitrieva.
796 * New interfaces: scandirat, scandirat64
797 Implemented by Ulrich Drepper.
799 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
800 Implemented by Ulrich Drepper.
802 * nscd now also caches the netgroup database.
803 Implemented by Ulrich Drepper.
805 * Integrate libm with gcc's -ffinite-math-only option.
806 Implemented by Ulrich Drepper.
808 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
809 to math functions. Implemented by Ulrich Drepper.
811 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
812 Implemented by Ulrich Drepper.
814 * New Linux interfaces: process_vm_readv, process_vm_writev
816 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
817 Implemented by Ulrich Drepper.
819 * Optimized nearbyint and strcasecmp for PPC.
820 Implemented by Adhemerval Zanella.
822 * New locales: bho_IN, unm_US, es_CU, ta_LK
826 * The following bugs are resolved with this release:
828 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
829 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
830 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
831 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
832 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
833 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
834 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
835 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
836 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
837 12795, 12811, 12813, 12814, 12841
839 * The RPC implementation in libc is obsoleted. Old programs keep working
840 but new programs cannot be linked with the routines in libc anymore.
841 Programs in need of RPC functionality must be linked against TI-RPC.
842 The TI-RPC implementation is IPv6 enabled and there are other benefits.
844 Visible changes of this change include (obviously) the inability to link
845 programs using RPC functions without referencing the TI-RPC library and the
846 removal of the RPC headers from the glibc headers.
847 Implemented by Ulrich Drepper.
849 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
850 syncfs, setns, sendmmsg
852 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
853 yue_HK, lij_IT, mhr_RU
855 * New encodings: CP770, CP771, CP772, CP773, CP774
857 * New program sotruss to trace calls through PLTs
858 Implemented by Ulrich Drepper.
860 * The malloc hook implementation is marked deprecated and will be removed
861 from the default implementation in the next version. The design never
862 worked ever since the introduction of threads. Even programs which do
863 not create threads themselves can use multiple threads created internally.
867 * The following bugs are resolved with this release:
869 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
870 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
871 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
872 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
875 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
877 * POWER7 optimizations: memset, memcmp, strncmp
879 * New optimized string functions for x86-64: strnlen (SSE2),
880 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
881 Implemented by Ulrich Drepper.
885 * The following bugs are resolved with this release:
887 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
888 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
889 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
890 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
891 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
892 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
893 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
894 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
896 * New interfaces: pthread_getname_np, pthread_setname_np
898 * New Linux interface: recvmmsg
900 * STT_GNU_IFUNC implemented for Sparc by David Miller.
902 * The dynamic linker now recognizes supported ABI versions from the
903 EI_ABIVERSION field in the ELF header.
904 Implemented by Ulrich Drepper.
906 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
907 will not be used to fill in password fields in the passwd.byname replies.
908 Instead it is used to synthesize the shadow.byname table, should it be
909 missing. This is a useful mode in some installations involving Solaris.
910 Implemented by Ulrich Drepper.
912 * New locales: kok_IN, sq_MK, cv_RU
916 * The following bugs are resolved with this release:
918 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
919 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
920 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
921 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
922 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
923 10789, 10817, 10823, 10840, 10847
925 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
927 Implemented by Ulrich Drepper.
929 * Checking version of longjmp added that fails if an uninitialized stack
930 frame would be created. Implemented by Ulrich Drepper.
932 * STT_GNU_IFUNC is now supported in static executables.
933 Implemented by H.J. Lu.
935 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
937 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
938 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
939 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
940 Contributed by H.J. Lu.
942 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
943 Implemented by Ulrich Drepper.
945 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
947 Contributed by H.J. Lu.
949 * Support for fma instruction in AVX on x86-64.
950 Implemented by H.J. Lu and Ulrich Drepper.
952 * AVX support in x86-64 auditing support in ld.so.
953 Implemented by H.J. Lu.
955 * STB_GNU_UNIQUE support added.
956 Implemented by Ulrich Drepper.
958 * Implement second fallback mode for optimized DNS lookup for even more
959 broken environments. If two requests from the same port are not
960 handled correctly close the socket and open a new one before sending
961 the second request. The 'single-request-reopen' option in /etc/resolv.conf
962 can be used to select this mode right away, instead of rediscovering the
963 necessity is every process again.
964 Implemented by Ulrich Drepper.
966 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
967 Implemented by Adam Tkac.
969 * Optimized iconv conversions for S390x.
970 Implemented by Andreas Krebbel.
972 * Using condvars with PI mutexes is now more efficient due to kernel
973 support for requeueing to PI futexes. NPTL support added for x86-64.
974 Implemented by Ulrich Drepper.
976 * New locales: ps_AF, my_MM
980 * The following bugs are resolved with this release:
982 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
983 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
984 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
985 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
986 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
988 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
989 Implemented by Ulrich Drepper.
991 * New Linux interfaces: accept4, fallocate, fallocate64.
992 Implemented by Ulrich Drepper.
994 * Correct declarations of string function when used in C++ code. This
995 could lead to compile errors for invalid C++ code.
997 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1000 * New POSIX 2008 interface: psiginfo
1001 Implemented by Ulrich Drepper.
1003 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1004 Implemented by Ulrich Drepper.
1006 * Support for selecting between multiple function definitions at runtime
1007 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1009 * The libcrypt library can now use the hash function implementations in
1010 NSS. Implemented by Ulrich Drepper.
1012 * The malloc implementation can be compiled to be less memory efficient
1013 but higher performing in multi-threaded programs.
1014 Implemented by Ulrich Drepper.
1016 * New locales: nan_TW@latin, ks_IN
1018 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1019 Implemented by Ulrich Drepper.
1021 * Extended printf hook support. It is possible to use user-defined types
1022 and extend existing format specifiers.
1023 Implemented by Ulrich Drepper.
1025 * Handling for group shadow files has been added.
1026 Implemented by Ulrich Drepper.
1028 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1029 servers (the case, e.g., for some people using the built-in DNS
1030 server in ADSL modems/routers). There is a once-per-process timeout
1031 in case of a broken server. To avoid it, users can run nscd or put
1032 'options single-request' in /etc/resolv.conf.
1033 Implemented by Ulrich Drepper.
1037 * The following bugs are resolved with this release:
1039 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1040 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1041 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1042 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1043 6968, 6974, 6980, 6995, 7008, 7009, 7029
1045 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1046 up at the same time. Implemented by Ulrich Drepper.
1048 * TLS descriptors for LD and GD on x86 and x86-64.
1049 Implemented by Alexandre Oliva.
1051 * getaddrinfo now handles DCCP and UDPlite.
1052 Implemented by Ulrich Drepper.
1054 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1055 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1056 Implemented by Ulrich Drepper.
1058 * New implementation of memmem, strstr, and strcasestr which is O(n).
1059 Implemented by Eric Blake.
1061 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1063 * Implement "e" option for popen to open file descriptor with the
1064 close-on-exec flag set. Implemented by Ulrich Drepper.
1066 * Implement "b" mode for fmemopen. In this mode writes writes don't
1067 implicitly add a NUL byte and seeks from the end of the buffer really
1068 use the buffer end, not the string length as the basis.
1069 Implemented by Ulrich Drepper.
1071 * Many functions, exported and internal, now atomically set the close-on-exec
1072 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1074 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1076 Implemented by Pravin Satpute.
1078 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1082 * The following bugs are resolved with this release:
1084 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1085 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1086 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1087 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1088 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1089 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1090 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1092 * New locales: bo_CN, bo_IN, shs_CA.
1094 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1096 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1097 Implemented by Pravin Satpute.
1099 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1101 * nscd caches now all timeouts for DNS entries
1102 Implemented by Ulrich Drepper.
1104 * nscd is more efficient and wakes up less often.
1105 Implemented by Ulrich Drepper.
1107 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1108 vdprintf, and obstack_vprintf.
1109 Implemented by Jakub Jelinek.
1111 * Faster memset for x86-64.
1112 Implemented by Harsha Jagasia and H.J. Lu.
1114 * Faster memcpy on x86.
1115 Implemented by Ulrich Drepper.
1117 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1118 Implemented by Ulrich Drepper.
1120 * Faster sqrt and sqrtf implemention for some PPC variants.
1121 Implemented by Steven Munroe.
1125 * The following bugs are resolved with this release:
1127 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1128 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1129 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1130 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1131 5071, 5103, 5104, 5112, 5113, 5184, 5186
1133 * More checking functions: fread, fread_unlocked, open*, mq_open.
1134 Implemented by Jakub Jelinek and Ulrich Drepper.
1136 * Extend fortification to C++. Implemented by Jakub Jelinek.
1138 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1139 by not recognizing 'a' as a modifier when those specs are requested.
1140 Implemented by Jakub Jelinek.
1142 * PPC optimizations to math and string functions.
1143 Implemented by Steven Munroe.
1145 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1146 options to be passed. Implemented by Ulrich Drepper.
1148 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1150 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1151 Implemented by Ulrich Drepper.
1153 * Handle private futexes in the NPTL implementation.
1154 Implemented by Jakub Jelinek and Ulrich Drepper.
1156 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1157 Implemented by Roland McGrath and Ulrich Drepper.
1159 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1161 * SHA-256 and SHA-512 based password encryption.
1162 Implemented by Ulrich Drepper.
1164 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1165 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1168 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1169 Implemented by Ulrich Drepper.
1173 * The following bugs are resolved with this release:
1175 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1176 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1177 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1178 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1179 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1180 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1181 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1184 * New Linux interfaces: epoll_pwait, sched_getcpu.
1186 * New generic interfaces: strerror_l.
1188 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1192 * The following bugs are resolved with this release:
1194 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1195 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1196 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1197 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1198 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1199 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1200 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1201 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1202 3225, 3251, 3252, 3253, 3273
1204 * For Linux, the sorting of addresses returned by getaddrinfo now also
1205 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1206 Implemented by Ulrich Drepper.
1208 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1209 Implemented by Ulrich Drepper.
1211 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1213 * New iconv module for MIK. Contributed by Alexander Shopov.
1215 * For sites with broken group and/or passwd database, the auto-propagate
1216 option of nscd can prevent creating ID lookup entries from the results
1217 of a name lookup and vice versa. This usually is no problem but some
1218 site might have problems with the default behavior.
1219 Implemented by Ulrich Drepper.
1221 * Iterating over entire database in NIS can be slow. With the
1222 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1223 to trade time for memory. The entire database will be read at once.
1224 Implemented by Ulrich Drepper.
1226 * The interfaces introduced in RFC 3542 have been implemented by
1229 * Support for the new ELF hash table format was added by Ulrich Drepper.
1231 * Support for priority inheritance mutexes added by Jakub Jelinek and
1234 * Support for priority protected mutexes added by Jakub Jelinek.
1236 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1237 or_IN, csb_PL, fy_NL, sr_ME.
1241 * More overflow detection functions.
1243 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1244 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1246 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1247 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1248 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1249 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1250 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1251 by Masahide Washizawa.
1253 * It is now possible to install audit libraries for the dynamic linker using
1254 LD_AUDIT. Implemented by Ulrich Drepper.
1256 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1257 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1258 For a libc and libpthread that works well on Linux 2.4 kernels, we
1259 recommend using the stable 2.3 branch.
1261 * The new function open_wmemstream acts like open_memstream,
1262 but uses a wchar_t wide character buffer.
1264 * The new function ppoll is an improved version of poll, similar to pselect.
1266 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1267 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1268 renameat, unlinkat, linkat, symlinkat, readlinkat.
1270 * New Linux kernel system calls: unshare,
1271 inotify_init, inotify_add_watch, inotify_rm_watch.
1273 * The euidaccess function is now also known by the alias eaccess,
1274 for compatibility with some other systems.
1276 * Timezone data updated to 2006b version.
1280 * The following bugs are resolved with this release:
1282 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1283 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1284 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1285 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1286 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1287 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1289 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1291 * As of this release, GCC 4 can be used to compile the C Library.
1293 * Timezone data updated to 2005m version.
1297 * The following bugs are resolved with this release:
1299 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1300 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1301 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1302 777, 787, 821, 822, 823, 825
1304 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1308 * Support for RFC 3678. Real implementations exist only for Linux so far.
1309 Implemented by Ulrich Drepper.
1311 * nscd can now cache entries persistently. Expiring entries are reloaded.
1312 For speedups the cache can be shared in memory with client processes.
1313 Implemented by Ulrich Drepper.
1315 * nscd can now perform SELinux checks.
1316 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1318 * getaddrinfo queries are now cached. Canonical name lookup is performed
1320 Implemented by Ulrich Drepper.
1322 * The nothrow function attribute is used when headers are used by gcc when
1323 compiling C code. This can avoid significant amounts of exception
1326 * The malloc functions perform more error checking and are stricter when
1327 it comes to reacting on errors. The default action is to terminate
1328 the process after showing an error message. Implemented by Ulrich Drepper.
1330 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1331 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1333 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1334 namespaces using the new function dlmopen(). This feature is of course,
1335 like most other dynamic loading functionality, not available in statically
1336 linked applications. Implemented by Ulrich Drepper.
1338 * Low-overhead boundary checking variants of string and some stdio functions
1339 were added. These are to be used in conjunction with a gcc patch by
1340 Jakub Jelinek which adds calls to these functions if possible.
1341 Implemented by Jakub Jelinek and Ulrich Drepper.
1343 * Old code for several operating systems and machine architectures that
1344 have not been in working condition in a long time have been removed from
1345 the main source tree maintained by the GNU C Library's maintainers.
1346 These files are now reside in the separate `ports' source module
1347 that is usable as an add-on when building the library.
1351 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1352 interrogate the dynamic linker, compatible with the Solaris interface.
1354 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1355 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1357 * getifaddrs now uses the netlink interface on Linux to get its information.
1358 Implemented by Thorsten Kukuk.
1360 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1361 Implemented by Ulrich Drepper.
1363 * support for non-executable stacks on x86 has been added. Changes mostly
1366 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1369 * getaddrinfo now performs destination address selection according to
1374 * Thread-safe interfaces for many functions that access locale data
1375 were added in version 2.3, but these features were omitted from NEWS.
1376 Many functions have variants with an `_l' suffix that take a `locale_t'
1377 object as a parameter rather than consulting the current locale.
1378 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1379 create and maintain `locale_t' objects. Additionally, the new function
1380 `uselocale' sets "the current locale" (as used by functions not so
1381 parameterized) set for an individual thread. These features were added
1382 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1384 * The functions getresuid, getresgid, setresuid, and setresgid, which
1385 have long been available on Linux, are now declared in <unistd.h>
1386 and are now also available on the Hurd.
1388 * ELF thread-local storage support (TLS) now works on x86-64.
1390 * The new dynamic string token $LIB is expanded in shared library names.
1391 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1393 * Aldy Hernandez contributed complete software floating point support for
1394 PowerPC machines with no FPU.
1396 * fexecve is implemented on Linux.
1398 * The `btowc' function should work at least twice as fast due to
1399 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1401 * With approriate thread add-ons cancelable functions are now implemented
1402 in libc.so as well. No need to call the function in libpthread. This
1403 change allowed to finally disable the incorrect and expensive handling
1404 of weak definition in ld.so.
1406 * Yet more PLT entries in libc.so have been removed. We finally arrived
1407 at the bare minimum. Startup times improved appropriately.
1409 * Support for the new Linux/x86 system call interface was added. The
1410 AT_SYSINFO auxiliary vector entry is recognized and handled.
1414 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1417 * iconv (the program and the interface) now accepts empty names (excluding
1418 options like //TRANSLIT) to mean "use charset of current locale".
1420 * localedef can now transliterate characters in strings which are not in
1421 the provided charmap. The information from the input locale is used.
1423 * Prelinking support was added for ELF targets. This requires additional
1424 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1426 * Read-only stdio streams now use mmap to speed up operation by eliminating
1427 copying and buffer underflows. To use add 'm' to the mode string of
1428 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1430 * The malloc functions were completely rewritten by Wolfram Gloger based
1431 on Doug Lea's malloc-2.7.0.c.
1433 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1434 implementation of regex.
1436 * Bruno Haible upgraded the iconv and locale implementation to support
1439 * Contents of the LC_* and LANG environment variables in the CEN style are
1440 not recognized anymore. It never was used. Change by Ulrich Drepper.
1442 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1443 thread-local storage (TLS) ABI on some platforms.
1444 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1446 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1447 EUC-JISX0213, and TSCII.
1449 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1450 BSD-compatible interface for getting all network interface addresses.
1451 Implementation for IPv4 by Roland McGrath.
1453 * Loading of locale data is faster due to the introduction of a locale
1454 archive. Implemented by Roland McGrath and Ulrich Drepper.
1456 * Startup times are significantly reduced by not using exported functions
1457 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1460 * Steven Munroe contributed a port to PowerPC64/Linux.
1464 * The Hurd now uses the GNU libio implementation of stdio rather than the
1465 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1467 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1468 with the same behavior as the Linux system call of the same name.
1472 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1473 128-bit long double format.
1475 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1476 IBM1161, and IBM1162 charsets.
1478 * Andreas Jaeger contributed a port to x86-64/Linux.
1480 * Peter Bruin contributed a port to PowerPC/Hurd.
1482 * libc functions using I/O streams now can handle wide-oriented streams
1485 * optimizations in the dynamic linker. Binaries created by recent binutils
1486 versions start up quicker due to reduced time spent on relocations.
1488 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1492 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1493 asinh, atanh, j0 for the 128-bit long double format.
1495 * Bruno Haible updated all the code handling Unicode in some form to
1496 support Unicode 3.1.
1498 * Speed of regex for single-byte locales is back to previous levels.
1499 Patch by Isamu Hasegawa.
1501 * Alpha, SPARC, and IA-64 now also using floating stacks.
1503 * Startup time of internationalized applications greatly improved through
1504 iconv cache. Use iconvconfig to generate the cache file.
1505 Contributed by Ulrich Drepper.
1507 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1508 severe performance problems. Patch by David Mosberger.
1510 * The Hurd port got a lot more functionality like AIO, various stdio
1511 extensions, etc. Mainly done by Roland McGrath.
1513 * mtrace can now lookup symbols in shared libraries.
1517 * Intel's IA-64 math library is largely integrated. It provides fast and
1518 accurate implementatations for most basic and standard math functions
1519 in float, double, and long double format.
1521 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1522 and asin for the 96-bit long double format and asin, log, tan for the
1523 128-bit long double format.
1525 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1526 The basic double functions exist today. Contributed by Abraham Ziv
1527 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1528 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1530 * An asynchronous name lookup library was added. The interface is designed
1531 after POSIX AIO. The proposal was circulated beforehand to get comments.
1532 No negative ones came in. Implemented by Ulrich Drepper.
1534 * Port to S390/64bit contributed by Martin Schwidefsky
1535 <schwidefsky@de.ibm.com>.
1537 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1538 of functions for Linux/IA-64.
1540 * The RPC code is now thread safe. Threads can now use the same service
1541 of different services at the same time. Patch by Eric Norum
1542 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1544 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1545 family of functions for Linux/S390.
1547 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1548 of functions for Linux/x86.
1550 * Port to Linux/CRIS contributed by Axis Communications.
1554 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1555 we can now check for namespace violations and missing declarations. The
1556 result is that almost all headers are now Unix-compliant (as defined in
1557 the upcoming XPG6). The negative side is that some programs might need
1558 corrections, too, if they depend on the incorrect form of the headers in
1559 previous versions which defined too many symbols and included too many
1562 * regex now handles multibyte character sets correctly.
1563 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1565 * iconv (the program) does now conform to the upcoming XPG6 and handles
1566 charmaps. Instead of the charset names the path of charmaps can be
1567 provided and the conversion happens based on this data.
1568 Contributed by Ulrich Drepper.
1570 * The locale program now provides detailed information about the installed
1575 only lists the names of the supported locales
1579 provides details such as country, language, and codeset name.
1580 Contributed by Ulrich Drepper.
1584 * The gencat program now parses the input file according to the charset
1585 selected by the LC_CTYPE category. This is important for stateful
1586 character sets. To make generating catalogs easier there is a way
1587 to overwrite the charset selected by the locale: before the first
1588 message or $ quote line the catalog can contain a line like
1590 $ codeset=ISO-8859-2
1592 to select the charset (ISO-8859-2 in this case).
1594 Implemented by Shinya Hanataka and Ulrich Drepper.
1596 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1597 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1598 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1600 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1601 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1603 * The LANGUAGE environment variable is now ignored unless the locale is
1604 changed from the default "C" locale.
1606 * The usual bug fixes.
1610 * Greg McGary added runtime support for bounds checking using gcc's
1611 new -fbounded-pointers option. ix86 target is complete. PowerPC
1614 * Thorsten Kukuk added secure mode support to nscd.
1616 * The Berkeley db libraries have been removed.
1618 Related, the nss_db module is now in a separate package since it
1619 obviously requires a database library being available.
1621 * Wide character I/O streams implemented by Ulrich Drepper.
1623 * Functions from the extended socket API added by Ulrich Drepper.
1625 * Functions feenableexcept and fedisableexcept to control the
1626 behaviour of individual exceptions have been added by Andreas Jaeger.
1628 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1630 * The resolver code has been updated from bind 8.2.3-T5B which supports
1631 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1634 This change could in some situations effect backward compatibility. Since
1635 now `_res' is a thread-local instead of a global variable, modifying it
1636 in one thread does not have any effect in other threads.
1638 The resolver library was also extended to allow IPv6 as the transport
1639 protocol for the requests. This work was done by Stig Venaas.
1641 * Compatibility code for K&R C compilers has been removed from the
1642 header files. A ISO C compiler is needed to use the library
1643 (conforming to either C89 or C99 standard).
1645 * Complete rewrite of the localedef program to support multibyte character
1646 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1647 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1648 Implemented by Ulrich Drepper.
1650 Bruno Haible significantly improved the generation and use of the data
1651 structures for the wide character tables.
1653 * Plural handling in gettext implemented by Ulrich Drepper.
1655 * The utmp daemon has been removed.
1657 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1659 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1662 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1664 * POSIX barriers implemented by Kaz Kylheku.
1666 * POSIX spawn function family implemented by Ulrich Drepper.
1668 * POSIX spinlocks are now available.
1670 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1672 * the configure option --enable-kernel=X.Y.Z allows to strip out
1673 compatibility for kernel versions before X.Y.Z. This is currently only
1674 implemented for Linux.
1676 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1677 field sin6_scope_id. This means that all programs using IPv6 should be
1678 recompiled. Don't expect binary compatibility with previous glibc
1681 * various conversion modules for IBM character sets contributed by
1684 * IA-64 port by Jes Sorensen and HJ Lu.
1698 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1700 * New xdr functions are added; some rpc functions are now 64bit clean.
1702 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1704 * Fixed known incompatibilities with glibc 2.0.
1706 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1708 * Optimized a number of functions (especially the ELF dynamic loader).
1710 * Update timezone data files.
1712 * lots of charmaps corrections
1714 * some new locale definitions and charmaps
1719 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1720 conform to POSIX member type requirements. Symbol versions have been
1721 adjusted as needed within the library, and for direct use by applications,
1722 but there is potential for problems if third-party libraries use
1723 struct timeval as part of their interface. This does not present
1724 a problem for X and other "essential" system libraries.
1726 * An additional locale model to support C++ Standard Library locale
1727 model and probably more was implemented by Ulrich Drepper.
1729 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1732 * Miles Bader provided the `argp' function family to support hierachical
1733 command line argument parsing, layered on top of getopt.
1735 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1737 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1740 * scanf recognizes the %a and %A format for scanning floating point numbers.
1742 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1743 information and interfaces for the available integer types.
1745 * about 130 new math functions were added to implement the ISO C9x math
1748 * the new header <complex.h> contains definitions of the complex math
1749 functions from ISO C 9X.
1751 * the new header <tgmath.h> defines generic macros to use complex or
1752 real valued functions.
1754 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1756 * Andreas Jaeger provided a test suite for the math library.
1758 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1760 * Ulrich Drepper added character set conversion functions (iconv).
1762 * Optimized string functions have been added.
1764 * The localedata addon is now part of glibc.
1766 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1768 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1769 daemon for NSS (nscd).
1771 Missing a better place here are some numbers on improvements. Under
1772 Linux 2.1.125 un-tar-ing the kernel sources takes
1776 using local files 12.19s 6.88s 22.91s
1778 using NIS 13.92s 8.91s 26.34s
1780 using NIS & nscd 10.37s 7.34s 25.30s
1782 using NIS+ 27.57s 30.37s 640.46s
1784 using NIS+ & nscd 10.25s 7.83s 26.51s
1786 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1788 Keep in mind that non-namelookup related operations dominate above times.
1789 It was just a common complain that using NIS+ unpacking the kernel is
1792 [1] The old nscd implementation is not available anymore since it was
1793 distributed with glibc up to version 2.0.98 and thus is now replaced.
1795 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1797 * Mark Kettenis provided a Hesiod NSS module.
1799 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1800 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1802 * rcmd can now handle netgroups (Dick Streefland).
1804 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1807 * Support for the IPv6 protocol has been added to the socket API, as per the
1808 latest draft standards.
1810 * Support for Linux 2.2 has been added.
1812 * Interface changes relative to the latest 2.0.x release:
1813 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1814 addseverity NEW: Unix98
1815 alphasort64 NEW: LFS
1816 argp_err_exit_status NEW: argp, GNU ext
1817 argp_error NEW: argp, GNU ext
1818 argp_failure NEW: argp, GNU ext
1819 argp_help NEW: argp, GNU ext
1820 argp_parse NEW: argp, GNU ext
1821 argp_program_bug_address NEW: argp, GNU ext
1822 argp_program_version NEW: argp, GNU ext
1823 argp_program_version_hook NEW: argp, GNU ext
1824 argp_state_help NEW: argp, GNU ext
1825 argp_usage NEW: argp, GNU ext
1826 authdes_create NEW: Secure RPC
1827 authdes_getucred NEW: Secure RPC
1828 authdes_pk_create NEW: Secure RPC
1829 backtrace NEW: GNU ext.
1830 backtrace_symbols NEW: GNU ext.
1831 backtrace_symbols_fd NEW: GNU ext.
1833 cacosf NEW: ISO C 9x
1834 cacosh NEW: ISO C 9x
1835 cacoshf NEW: ISO C 9x
1836 cacoshl NEW: ISO C 9x
1837 cacosl NEW: ISO C 9x
1844 casinf NEW: ISO C 9x
1845 casinh NEW: ISO C 9x
1846 casinhf NEW: ISO C 9x
1847 casinhl NEW: ISO C 9x
1848 casinl NEW: ISO C 9x
1850 catanf NEW: ISO C 9x
1851 catanh NEW: ISO C 9x
1852 catanhf NEW: ISO C 9x
1853 catanhl NEW: ISO C 9x
1854 catanl NEW: ISO C 9x
1855 cbc_crypt NEW: Secure RPC
1859 ccoshf NEW: ISO C 9x
1860 ccoshl NEW: ISO C 9x
1866 cimagf NEW: ISO C 9x
1867 cimagl NEW: ISO C 9x
1868 clearerr_locked REMOVED
1869 clntunix_create NEW: sunrpc ext
1871 clog10 NEW: ISO C 9x
1872 clog10f NEW: ISO C 9x
1873 clog10l NEW: ISO C 9x
1883 cprojf NEW: ISO C 9x
1884 cprojl NEW: ISO C 9x
1886 crealf NEW: ISO C 9x
1887 creall NEW: ISO C 9x
1892 csinhf NEW: ISO C 9x
1893 csinhl NEW: ISO C 9x
1896 csqrtf NEW: ISO C 9x
1897 csqrtl NEW: ISO C 9x
1901 ctanhf NEW: ISO C 9x
1902 ctanhl NEW: ISO C 9x
1904 des_setparity NEW: Secure RPC
1905 ecb_crypt NEW: Secure RPC
1906 endutxent NEW: Unix98
1908 exp10f NEW: ISO C 9x
1909 exp10l NEW: ISO C 9x
1913 fattach NEW: STREAMS
1914 fdetach NEW: STREAMS
1918 feclearexcept NEW: ISO C 9x
1919 fegetenv NEW: ISO C 9x
1920 fegetexceptflag NEW: ISO C 9x
1921 fegetround NEW: ISO C 9x
1922 feholdexcept NEW: ISO C 9x
1924 feraiseexcept NEW: ISO C 9x
1925 ferror_locked REMOVED
1926 fesetenv NEW: ISO C 9x
1927 fesetexceptflag NEW: ISO C 9x
1928 fesetround NEW: ISO C 9x
1929 fetestexcept NEW: ISO C 9x
1930 feupdateenv NEW: ISO C 9x
1931 fflush_locked REMOVED
1935 fgets_unlocked NEW: GNU ext.
1936 fileno_locked REMOVED
1948 fputc_locked REMOVED
1949 fputs_unlocked NEW: GNU ext.
1950 fread_unlocked NEW: GNU ext.
1955 fstatvfs NEW: Unix98
1959 ftruncate64 NEW: LFS
1961 fwrite_unlocked NEW: GNU ext.
1962 gai_strerror NEW: IPv6
1966 getchar_locked REMOVED
1968 getdate_err NEW: Unix98
1969 getdate_r NEW: GNU ext.
1971 getnameinfo NEW: IPv6
1972 getnetname NEW: Secure RPC
1973 getpmsg NEW: STREAMS
1974 getpt NEW: Unix98 PTY
1975 getrlimit64 NEW: LFS
1976 getutxent NEW: Unix98
1977 getutxid NEW: Unix98
1978 getutxline NEW: Unix98
1979 glob64 NEW: GNU ext.
1980 globfree64 NEW: GNU ext.
1981 gnu_get_libc_release NEW: GNU ext.
1982 gnu_get_libc_version NEW: GNU ext.
1983 grantpt NEW: Unix98 PTY
1984 host2netname NEW: Secure RPC
1986 iconv_close NEW: iconv
1987 iconv_open NEW: iconv
1988 if_freenameindex NEW: IPv6
1989 if_indextoname NEW: IPv6
1990 if_nameindex NEW: IPv6
1991 if_nametoindex NEW: IPv6
1992 in6addr_any NEW: IPv6
1993 in6addr_loopback NEW: IPv6
1994 inet6_isipv4mapped NEW: IPv6
1995 isastream NEW: STREAMS
1996 iswblank NEW: GNU ext.
1997 key_decryptsession NEW: Secure RPC
1998 key_decryptsession_pk NEW: Secure RPC
1999 key_encryptsession NEW: Secure RPC
2000 key_encryptsession_pk NEW: Secure RPC
2001 key_gendes NEW: Secure RPC
2002 key_get_conv NEW: Secure RPC
2003 key_secretkey_is_set NEW: Secure RPC
2004 key_setnet NEW: Secure RPC
2005 key_setsecret NEW: Secure RPC
2006 llrint NEW: ISO C 9x
2007 llrintf NEW: ISO C 9x
2008 llrintl NEW: ISO C 9x
2009 llround NEW: ISO C 9x
2010 llroundf NEW: ISO C 9x
2011 llroundl NEW: ISO C 9x
2016 lrintf NEW: ISO C 9x
2017 lrintl NEW: ISO C 9x
2018 lround NEW: ISO C 9x
2019 lroundf NEW: ISO C 9x
2020 lroundl NEW: ISO C 9x
2022 makecontext NEW: Unix98
2023 mempcpy NEW: GNU ext.
2026 modify_ldt NEW: kernel
2030 nearbyint NEW: ISO C 9x
2031 nearbyintf NEW: ISO C 9x
2032 nearbyintl NEW: ISO C 9x
2033 netname2host NEW: Secure RPC
2034 netname2user NEW: Secure RPC
2035 nexttoward NEW: ISO C 9x
2036 nexttowardf NEW: ISO C 9x
2037 nexttowardl NEW: ISO C 9x
2041 passwd2des NEW: Secure RPC
2043 pow10f NEW: GNU ext.
2044 pow10l NEW: GNU ext.
2047 printf_size NEW: GNU ext.
2048 printf_size_info NEW: GNU ext.
2049 profil_counter REMOVED
2050 pthread_mutexattr_getkind_np REPLACED
2051 pthread_mutexattr_setkind_np REPLACED
2052 ptsname NEW: Unix98 PTY
2053 ptsname_r NEW: Unix98 PTY
2055 putchar_locked REMOVED
2056 putgrent NEW: GNU ext.
2058 putpmsg NEW: STREAMS
2059 pututxline NEW: Unix98
2063 readdir64_r NEW: LFS
2064 remquo NEW: ISO C 9x
2065 remquof NEW: ISO C 9x
2066 remquol NEW: ISO C 9x
2068 roundf NEW: ISO C 9x
2069 roundl NEW: ISO C 9x
2071 scalbln NEW: ISO C 9x
2072 scalblnf NEW: ISO C 9x
2073 scalblnl NEW: ISO C 9x
2075 sendfile NEW: kernel
2076 setcontext NEW: Unix98
2077 setrlimit64 NEW: LFS
2078 setutxent NEW: Unix98
2080 sigignore NEW: Unix98
2081 sigqueue NEW: POSIX.1b
2082 sigrelse NEW: Unix98
2083 sigset NEW: POSIX.1b
2084 sigtimedwait NEW: POSIX.1b
2085 sigwaitinfo NEW: POSIX.1b
2086 sincos NEW: GNU ext.
2087 sincosf NEW: GNU ext.
2088 sincosl NEW: GNU ext.
2092 strcasestr NEW: GNU ext.
2093 strtoimax NEW: ISO C 9x
2094 strtoumax NEW: ISO C 9x
2095 strverscmp NEW: GNU ext.
2096 svcauthdes_stats NEW: Secure RPC
2097 svcunix_create NEW: sunrpc etx
2098 svcunixfd_create NEW: sunrpc ext
2099 swapcontext NEW: Unix98
2100 tcgetsid NEW: Unix98 PTY
2101 tdestroy NEW: GNU ext.
2102 tgamma NEW: ISO C 9x
2103 tgammaf NEW: ISO C 9x
2104 tgammal NEW: ISO C 9x
2108 truncf NEW: ISO C 9x
2109 truncl NEW: ISO C 9x
2111 unlockpt NEW: Unix98 PTY
2112 updwtmpx NEW: Unix98
2113 user2netname NEW: Secure RPC
2114 utmpxname NEW: Unix98
2115 versionsort NEW: GNU ext.
2116 versionsort64 NEW: GNU ext.
2118 wcscasecmp NEW: GNU ext.
2119 wcsncasecmp NEW: GNU ext.
2120 wcsnlen NEW: GNU ext.
2121 wcstoimax NEW: ISO C 9x
2122 wcstoll NEW: ISO C 9x
2123 wcstoull NEW: ISO C 9x
2124 wcstoumax NEW: ISO C 9x
2126 wordexp NEW: POSIX.2
2127 wordfree NEW: POSIX.2
2128 write_profiling REMOVED
2129 xdecrypt NEW: Secure RPC
2130 xdr_authdes_cred NEW: Secure RPC
2131 xdr_authdes_verf NEW: Secure RPC
2132 xdr_cryptkeyarg NEW: Secure RPC
2133 xdr_cryptkeyarg2 NEW: Secure RPC
2134 xdr_cryptkeyres NEW: Secure RPC
2135 xdr_getcredres NEW: Secure RPC
2136 xdr_key_netstarg NEW: Secure RPC
2137 xdr_key_netstres NEW: Secure RPC
2138 xdr_keybuf NEW: Secure RPC
2139 xdr_keystatus NEW: Secure RPC
2140 xdr_netnamestr NEW: Secure RPC
2141 xdr_sizeof NEW: Secure RPC
2142 xdr_unixcred NEW: sunrpc ext
2143 xencrypt NEW: Secure RPC
2144 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2155 * inet_ntoa is thread-safe
2157 * updwtmp is moved from libutil to libc
2159 * rewrite of cbrt function
2161 * update of timezone data
2175 * add atoll function
2177 * fix complex problems in Berkeley DB code
2179 * fix math functions
2183 * fixed lots of header problems (especially Linux/GNU specific)
2185 * dynamic loader preserves all registers
2187 * Roland McGrath provided support for handling of auxiliary objects in
2188 the ELF dynamic loader.
2190 * support for parallel builds is improved
2194 * GNU extensions are no longer declared by default. To enable them you
2195 must define the macro `_GNU_SOURCE' in your program or compile with
2198 * The library has changed from using GNU ld symbol aliases to using weak
2199 symbols where available. The ELF object file format supports weak
2200 symbols; GNU ld also supports weak symbols in the a.out format. (There
2201 is also now support for other GNU ld extensions in ELF. Use the
2202 `--with-elf' option to configure to indicate you have ELF, and
2203 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2204 of many files which contained only symbol aliases, reducing the size of
2205 the source and the compiled library; many other files were renamed to
2206 less cryptic names previously occupied by the symbol alias files.
2207 There is a new header file <elf.h> for programs which operate on
2208 files in the ELF format.
2210 * Converted to Autoconf version 2, so `configure' has more options.
2211 Run `configure --help' to see the details.
2213 * The library can now be configured to build profiling, highly-optimized
2214 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2215 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2216 `configure' enable building these extra libraries. The shared library is
2217 built by default when using both ELF and GNU ld. When shared libraries
2218 are enabled, the new library `-ldl' is available for arbitrary run-time
2219 loading of shared objects; its interface is defined in <dlfcn.h>. The
2220 new header file <link.h> gives access to the internals of the run-time
2221 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2222 application of same name on other systems and it provides information
2223 about dynamically linked binaries.
2225 * The C library now provides the run-time support code for profiling
2226 executables compiled with `-pg'. Programs can control the profiling code
2227 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2228 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2229 the support for this file format was contributed by David Mosberger-Tang.
2231 * The math code has been replaced with a math library based on fdlibm from
2232 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2233 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2234 functions. The math functions now reside in a separate library, so
2235 programs using them will need to use `-lm' their linking commands.
2237 * John C. Bowman contributed optimized ix87 assembler inline functions.
2239 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2240 mechanism similar to that found in Solaris 2. This is now used for the
2241 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2242 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2243 file controls what services are used for each individual database. This
2244 works by loading shared libraries with names specified in `nsswitch.conf',
2245 so service modules can be changed or added at any time without even
2246 relinking any program. Currently there are the file, db, and NIS based
2247 NSS services available.
2249 * The new functions `strtoq' and `strtouq' parse integer values from
2250 strings, like `strtol' and `strtoul', but they return `long long int' and
2251 `unsigned long long int' values, respectively (64-bit quantities).
2253 * The new functions `strtof' and `strtold' parse floating-point values from
2254 strings, like `strtod', but they return `float' and `long double' values,
2255 respectively (on some machines `double' and `long double' are the same).
2257 * Ulrich Drepper has contributed new implementations of the floating-point
2258 printing and reading code used in the `printf' family of functions and
2259 `strtod', `strtof', and `strtold'. These new functions are perfectly
2260 accurate, and much faster than the old ones.
2262 * The implementation of the POSIX locale model was completely rewritten by
2263 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2264 to compile the POSIX locale definition.
2266 * The former dummy implementations of the strcoll and strxfrm function are
2267 now replaced by fully functional code contributed by Ulrich Drepper. The
2268 collation information comes from the POSIX locale definitions.
2270 * The new header <langinfo.h> defines an interface for accessing
2271 various locale-dependent data (using the locale chosen with `setlocale').
2273 * Ulrich Drepper has contributed a new suite of functions for operation on
2274 wide-character and multibyte-character strings, in <wchar.h>;
2275 and classification and case conversion of wide characters, in <wctype.h>.
2276 These new functions are conforming to the ISO C, Amendement 1 specification.
2278 * There is now a second implementation of the standard I/O library available.
2279 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2280 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2282 * You can now use positional parameter specifications in format strings
2283 for the `printf' and `scanf' families of functions. For example,
2284 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2285 ``Number 6, Mr Jones''. This is mainly useful when providing different
2286 format strings for different languages, whose grammars may dictate
2287 different orderings of the values being printed. To support this
2288 feature, the interface for `register_printf_handler' has changed; see
2289 the header file <printf.h> for details.
2291 * The `printf' and `scanf' families of functions now understand a new
2292 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2293 to group numbers as indicated by the locale; for `scanf' and friends, this
2294 says to accept as valid only a number with all the proper grouping
2295 separators in the right places. In the default "C" locale, numbers are
2296 not grouped; but locales for specific countries will define the usual
2297 conventions (i.e. separate thousands with `,' in the US locale).
2299 * The pgrp functions have been regularized, slightly incompatibly but much
2300 less confusingly. The core functions are now `getpgid' and `setpgid',
2301 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2302 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2303 provided for compatibility. There is no longer an incompatible `getpgrp'
2304 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2306 * The new header file <fts.h> and suite of functions simplify programs that
2307 operate on directory trees. This code comes from 4.4 BSD.
2309 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2310 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2311 NSS scheme used in glibc.
2313 * There is a new malloc debugging hook `__memalign_hook'.
2315 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2316 `unsigned int' in <sys/types.h>. These are for compatibility only and
2317 their use is discouraged.
2319 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2320 done differently, so that it works even without GNU ld.
2322 * New function `euidaccess' checks allowed access to a file like `access',
2323 but using the effective IDs instead of the real IDs.
2325 * The time zone data files have been updated for the latest and greatest
2326 local time conventions of the countries of the world.
2328 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2331 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2332 for formatting floating-point numbers. They are provided only for
2333 compatibility; new programs should use `sprintf' instead. There are
2334 also equivalent function for the `long double' floating-point type and
2335 all functions also exist in a reentrant form.
2337 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2338 functions for maintaining the login-record files (primarily of use to
2339 system programs such as `login'), and convenient functions for
2340 allocating and initializing a pseudo-terminal (pty) device.
2342 * Ulrich Drepper has contributed new support for System V style
2343 shared memory and IPC on systems that support it.
2345 * Ulrich Drepper has contributed several miscellaneous new functions found
2346 in System V: The `hsearch' family of functions provide an effective
2347 implementation of hash tables; `a64l' and `l64a' provide a very simple
2348 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2351 * Ulrich Drepper has contributed new reentrant counterparts for the
2352 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2354 * Ulrich Drepper has contributed new, highly-optimized versions of several
2355 string functions for the i486/Pentium family of processors.
2357 * Ulrich Drepper has updated the Linux-specific code, based largely
2358 on work done in Hongjiu Lu's version of GNU libc for Linux.
2359 The GNU library now supports Linux versions 2.0.10 and later,
2360 using the ELF object file format (i[3456]86-*-linux).
2362 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2364 * David Mosberger-Tang and Richard Henderson have ported the C library
2365 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2366 dynamic linking support for ELF/Alpha.
2368 * Richard Henderson contributed several Alpha optimized assembler function
2369 for arithmetic and string handling.
2371 * Ulrich Drepper has contributed a new set of message catalog functions to
2372 support multiple languages using the <libintl.h> interface, for use with
2373 his new package GNU gettext. Translation volunteers have contributed
2374 catalogs of the library's messages in Spanish, German, and Korean.
2376 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2377 program and the `catgets' function for reading the catalog files it
2378 creates. (The <libintl.h> interface is preferred; we include the
2379 <nl_types.h> interface using `catgets' only for source compatibility with
2380 programs already written to use it.)
2382 * New header file <values.h> gives SVID-compatible names for <limits.h>
2385 * Various new macros, declarations, and small header files for compatibility
2388 * New function `group_member' is a convenient way to check if a process has
2389 a given effective group ID.
2391 * When using GCC 2.7 and later, the socket functions are now declared in a
2392 special way so that passing an argument of type `struct sockaddr_in *',
2393 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2394 `struct sockaddr *' type, does not generate a type-clash warning.
2396 * New function `error' declared in header file <error.h> is a convenient
2397 function for printing error messages and optionally exiting; this is the
2398 canonical function used in GNU programs. The new functions `err', `warn',
2399 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2400 doing the same thing.
2402 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2403 POSIX.2 `glob' function to do ~ and {...} expansion.
2405 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2406 `clearenv' which is used in POSIX.9 is also available.
2408 * New function `getsid' returns session ID number on systems that support it.
2410 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2411 files <db.h> and <mpool.h> provide a rich set of functions for several
2412 types of simple databases stored in memory and in files, and <ndbm.h> is
2413 an old `ndbm'-compatible interface using the `db' functions. Link with
2414 `-ldb' to get these functions.
2416 * New macro `strdupa' copies a string like `strdup', but uses local stack
2417 space from `alloca' instead of dynamic heap space from `malloc'.
2419 * New function `strnlen' is like `strlen' but searches only a given maximum
2420 number of characters for the null terminator. `stpncpy', `strndup' and
2421 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2424 * New function `statfs' in header <sys/statfs.h>.
2426 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2427 provide convenient functions for operating on blocks of null-terminated
2430 * A new suite of functions in <utmp.h> handle all the details of reading
2431 and writing the utmp file.
2433 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2436 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2437 completely POSIX compliant and also implemented the extended functionality
2438 to handle alternate digit representation and alternate era date formats.
2440 * Ulrich Drepper provided an implementation of the `strptime' function
2441 defined in XPG4.2 which transforms a string into a `struct tm' value.
2443 * Paul Eggert provided the tzselect shell script as part of the timezone
2444 code. The shell script makes it easy to select the correct timezone
2447 * The implementation of the malloc family of functions is completely replaced
2448 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2449 The implementation uses the mmap function (if available) and it is
2450 optimized for the use in multi threaded programs.
2452 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2453 functions. This new functionality is usable by specifying a special
2454 salt string and it is compatible with implementation on *BSD systems.
2456 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2457 `getsubopt' to handle second level command line options, `bsd_signal'
2458 to access BSD style `signal' functionality, the obsolete `regexp' style
2461 * the `lchown' function is available on system which support this
2464 * The implementation of the shadow password handling function was contributed
2467 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2469 * POSIX.1g support was added. The <sys/select.h> header is available,
2470 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2471 implementation of `getaddrinfo'.
2475 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2477 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2478 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2480 * The new function `daemon' from 4.4 BSD is useful for server programs that
2481 want to put themselves in the background.
2483 * Joel Sherrill has contributed support for several standalone boards that
2484 run without an operating system.
2486 * `printf', `scanf' and friends now accept a `q' type modifier for long
2487 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2489 * All of the code taken from BSD (notably most of the math and networking
2490 routines) has been updated from the BSD 4.4-Lite release.
2492 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2494 * The new functions `getdomainname' and `setdomainname' fetch or change the
2495 YP/NIS domain name. These are system calls which exist on systems which
2498 * The time zone data files have been updated for the latest international
2501 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2502 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2506 * The C library now includes support for Sun RPC, from Sun's free
2507 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2508 are included. (There is still no support for YP.)
2510 * Tom Quinn has contributed a port of the C library to SGI machines running
2511 Irix 4 (mips-sgi-irix4).
2513 * The new `lockf' function is a simplified interface to the locking
2514 facilities of `fcntl', included for compatibility.
2516 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2518 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2520 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2523 * The error message printed by `assert' for a failed assertion now includes
2524 the name of the program (if using GNU ld) and the name of the calling
2525 function (with versions of GCC that support this).
2527 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2529 * The library now includes the <sys/mman.h> header file and memory
2530 management functions `mmap', `munmap', `mprotect', `msync', and
2531 `madvise', on systems that support those facilities.
2533 * The interface for `mcheck' has changed slightly: the function called to
2534 abort the program when an allocation inconsistency is detected now takes
2535 an argument that indicates the type of failure. The new function
2536 `mprobe' lets you request a consistency check for a particular block at
2537 any time (checks are normally done only when you call `free' or `realloc'
2540 * It is now possible to easily cross-compile the C library, building on one
2541 system a library to run on another machine and/or operating system. All
2542 you need to do is set the variable `HOST_CC' in `configparms' to the
2543 native compiler for programs to run on the machine you are building on (a
2544 few generator programs are used on Unix systems); set `CC' to the
2547 * The new function `fexecve' (only implemented on the GNU system) executes
2548 a program file given a file descriptor already open on the file.
2552 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2553 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2555 * You can set the variable `libprefix' in `configparms' to specify a prefix
2556 to be prepended to installed library files; this makes it easy to install
2557 the GNU C library to be linked as `-lgnuc' or whatever.
2559 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2560 copies a limited number of characters from a string, and returns the
2561 address of the last character written.
2563 * You no longer need to check for whether the installed `stddef.h' is
2564 compatible with the GNU C library. configure now checks for you.
2566 * You can now define a per-stream `fileno' function to convert the
2567 stream's cookie into an integral file descriptor.
2569 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2570 allocates zero bytes of storage, and returns a unique pointer which
2571 you can pass to `realloc' or `free'. The behavior is undefined if
2572 you dereference this pointer.
2574 * The C library now runs on Sony NEWS m68k machines running either
2575 NewsOS 3 or NewsOS 4.
2577 * The new `syscall' function is a system-dependent primitive function
2578 for invoking system calls. It has the canonical behavior on Unix
2579 systems, including unreliable return values for some calls (such as
2580 `pipe', `fork' and `getppid').
2582 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2583 to `EAGAIN', which is the preferred name. On systems whose kernels
2584 use two distinct codes, the C library now translates EWOULDBLOCK to
2585 EAGAIN in every system call function.
2589 * The GNU C Library Reference Manual is now distributed with the library.
2590 `make dvi' will produce a DVI file of the printed manual.
2591 `make info' will produce Info files that you can read on line using C-h i
2592 in Emacs or the `info' program.
2593 Please send comments on the manual to bug-glibc-manual@gnu.org.
2595 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2597 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2599 * Jason Merrill has contributed a port to the Sequent Symmetry running
2600 Dynix version 3 (i386-sequent-dynix).
2602 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2603 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2605 * New function `memory_warnings' lets you arrange to get warnings when
2606 malloc is running out of memory to allocate, like Emacs gives you.
2608 * The C library now contains the relocating allocator used in Emacs 19 for
2609 its editing buffers. This allocator (ralloc) minimizes allocation
2610 overhead and fragmentation by moving allocated regions around whenever it
2611 needs to. You always refer to a ralloc'd region with a "handle" (a
2612 pointer to a pointer--an object of type `void **').
2614 * There is a new `printf' format: `%m' gives you the string corresponding
2615 to the error code in `errno'.
2617 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2618 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2619 pass, the `a' modifier says to fill in a `char **' you pass with a
2622 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2623 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2624 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2626 * `mkstemp' is a traditional Unix function to atomically create and open a
2627 uniquely-named temporary file.
2631 * The standard location for the file that says what the local timezone is
2632 has changed again. It is now `/usr/local/etc/localtime' (or more
2633 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2635 * The distribution no longer contains any files with names longer than 14
2638 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2639 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2641 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2645 * The configuration process has changed quite a bit. The `configure'
2646 script is now used just like the configuration scripts for other GNU
2647 packages. The `sysdeps' directory hierarchy is much rearranged.
2648 The file `INSTALL' explains the new scheme in detail.
2650 * The header files no longer need to be processed into ANSI C and
2651 traditional C versions. There is just one set of files to install, and
2652 it will work with ANSI or old C compilers (including `gcc -traditional').
2654 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2655 MIPS DECStation running Ultrix 4.
2657 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2658 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2659 made itself into a shared library.
2661 * Yet further improved support for the i386, running 4.3 BSD-like systems
2662 (such as Mach 3 with the Unix single-server), or System V.
2664 * New function `strncasecmp' to do case-insensitive string comparison
2665 with limited length.
2667 * New function `strsep' is a reentrant alternative to `strtok'.
2669 * New functions `scandir' and `alphasort' for searching directories.
2671 * New function `setenv' is a better interface to `putenv'.
2673 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2674 function for traversing a directory tree.
2676 * The GNU obstack package is now also part of the C library.
2677 The new function `open_obstack_stream' creates a stdio stream that
2678 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2679 formatted output directly to an obstack.
2681 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2682 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2684 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2686 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2687 things to your strings.
2689 * There are some new test programs: test-fseek, testmb, and testrand.
2691 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2692 These ports are not finished, but are a good starting place for really
2693 supporting those systems.
2695 * `/etc/localtime' is now the standard location for the file that says what
2696 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2697 This follows the general principle that `/etc' is the place for all local
2698 configuration files.
2700 * The C library header files now use `extern "C"' when used by the C++
2701 compiler, so the C library should now work with C++ code.
2703 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2704 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2707 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2708 function which uses the `merge sort' algorithm, and is said to be
2709 significantly faster than the old GNU `qsort' function. Merge sort is
2710 now the standard `qsort' function. The new algorithm can require a lot
2711 of temporary storage; so, the old sorting function is called when the
2712 required storage is not available.
2714 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2715 provides the Unix `crypt' function, plus some other entry points.
2717 * The code and header files taken from 4.4 BSD have been updated with the
2718 latest files released from Berkeley.
2720 ----------------------------------------------------------------------
2721 Copyright information:
2723 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2725 Permission is granted to anyone to make or distribute verbatim copies
2726 of this document as received, in any medium, provided that the
2727 copyright notice and this permission notice are preserved,
2728 thus giving the recipient permission to redistribute in turn.
2730 Permission is granted to distribute modified versions
2731 of this document, or of portions of it,
2732 under the above conditions, provided also that they
2733 carry prominent notices stating who last changed them.
2736 version-control: never