1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
13 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
14 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
15 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
16 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
17 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
18 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
19 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
20 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
21 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
22 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
23 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
24 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
25 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
26 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
27 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
28 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
29 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
30 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
31 18657, 18676, 18694, 18696.
33 * Cache information can be queried via sysconf() function on s390 e.g. with
34 _SC_LEVEL1_ICACHE_SIZE as argument.
36 * A buffer overflow in gethostbyname_r and related functions performing DNS
37 requests has been fixed. If the NSS functions were called with a
38 misaligned buffer, the buffer length change due to pointer alignment was
39 not taken into account. This could result in application crashes or,
40 potentially arbitrary code execution, using crafted, but syntactically
41 valid DNS responses. (CVE-2015-1781)
43 * The time zone file parser has been made more robust against crafted time
44 zone files, avoiding heap buffer overflows related to the processing of
45 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
46 large time zone data files. Overly long time zone specifiers in the TZ
47 variable no longer result in stack overflows and crashes.
49 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
50 for LD and GD on x86 and x86-64, has been implemented. You will need
51 binutils-2.24 or later to enable this optimization.
53 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
54 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
55 Hat). These updates cause user visible changes, such as the fix for bug
58 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
59 and getXXbyYY NSS calls for the same database, causing a denial-of-service
60 condition in some applications.
62 * Added vector math library named libmvec with the following vectorized x86_64
63 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
65 The library can be disabled with --disable-mathvec. Use of the functions is
66 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
67 Shared library libmvec.so is linked in as needed when using -lm (no need to
68 specify -lmvec explicitly for not static builds).
69 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
71 * A new fmemopen implementation has been added with the goal of POSIX
72 compliance. The new implementation fixes the following long-standing
73 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
74 old implementation is still present for use be by existing binaries.
76 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
77 releases. It has been fixed to match 2.19 and older, but binaries built
78 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
80 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
81 Contributed by Roland McGrath (Google).
83 * The header <regexp.h> is deprecated, and will be removed in a future
84 release. Use of this header will trigger a deprecation warning.
85 Application developers should update their code to use <regex.h> instead.
87 This header was formerly part of SUSv2, but was deprecated in 1997 and
88 removed from the standard in 2001. Also, the glibc implementation
89 leaks memory. See BZ#18681 for more details.
93 * The following bugs are resolved with this release:
95 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
96 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
97 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
98 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
99 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
100 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
101 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
102 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
103 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
104 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
107 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
108 too little memory for the to-be-scanned arguments and overflow the
109 allocated buffer. The implementation now correctly computes the required
110 buffer size when using malloc, and switches to malloc from alloca as
113 * A new semaphore algorithm has been implemented in generic C code for all
114 machines. Previous custom assembly implementations of semaphore were
115 difficult to reason about or ensure that they were safe. The new version
116 of semaphore supports machines with 64-bit or 32-bit atomic operations.
117 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
118 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
120 * Port to Altera Nios II has been contributed by Mentor Graphics.
122 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
123 implementations for powerpc64/powerpc64le.
124 Implemented by Adhemerval Zanella (IBM).
126 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
127 and powerpc64le. This may improve lock scaling of existing programs on
128 HTM capable systems. The lock elision code is only enabled with
129 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
130 powerpc will issue a transaction abort on every syscall to avoid side
131 effects being visible outside transactions.
133 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
134 AArch64. Contributed by ARM Ltd.
136 * i386 memcpy functions optimized with SSE2 unaligned load/store.
138 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
139 under certain input conditions resulting in the execution of a shell for
140 command substitution when the application did not request it. The
141 implementation now checks WRDE_NOCMD immediately before executing the
142 shell and returns the error WRDE_CMDSUB as expected.
144 * CVE-2012-3406 printf-style functions could run into a stack overflow when
145 processing format strings with a large number of format specifiers.
147 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
148 infinite loop if the DNS response contained a PTR record of an unexpected
151 * The minimum GCC version that can be used to build this version of the GNU
152 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
153 still be used to compile programs using the GNU C Library.
155 * The GNU C Library is now built with -Werror by default. This can be
156 disabled by configuring with --disable-werror.
158 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
160 * The obsolete sigvec function has been removed. This was the original
161 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
162 programs have been using instead for about 25 years. Of course, ABI
163 compatibility for old binaries using sigvec remains intact.
165 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
166 with newer versions of bison.
168 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
169 The original MIPS o32 hard-float ABI requires an FPU where double-precision
170 registers overlay two consecutive single-precision registers. MIPS32R2
171 introduced a new FPU mode (FR=1) where double-precision registers extend the
172 corresponding single-precision registers which is incompatible with the
173 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
174 require the use of FR=1 making a transition necessary. New o32 ABI
175 extensions enable users to migrate over time from the original o32 ABI
176 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
177 tracks the ABI of any loaded object and verifies that new objects are
178 compatible. Mode transitions will also be requested as required and
179 unsupportable objects will be rejected. The ABI checks include both soft and
180 hard float ABIs for o32, n32 and n64.
182 GCC 5 with GNU binutils 2.25 onwards:
183 It is strongly recommended that all o32 system libraries are built using the
184 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
185 with the original and all new o32 ABI extensions. Configure a MIPS GCC
186 compiler using --with-fp-32=xx to set this by default.
190 * The following bugs are resolved with this release:
192 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
193 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
194 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
195 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
196 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
197 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
198 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
199 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
200 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
201 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
202 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
203 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
204 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
205 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
206 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
208 * Reverted change of ABI data structures for s390 and s390x:
209 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
210 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
211 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
212 are preserved pointing straight to the same implementation as the old ones.
213 Given that, new callers will simply provide a too-big buffer to these
214 functions. Any applications/libraries out there that embed jmp_buf or
215 ucontext_t in an ABI-relevant data structure that have already been rebuilt
216 against 2.19 headers will have to rebuilt again. This is necessary in any
217 case to revert the breakage in their ABI caused by the glibc change.
219 * Support for file description locks is added to systems running the
220 Linux kernel. The standard file locking interfaces are extended to
221 operate on file descriptions, not file descriptors, via the use of
222 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
223 are associated with an open file instead of a process.
225 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
227 * The minimum Linux kernel version that this version of the GNU C Library
228 can be used with is 2.6.32.
230 * Running the testsuite no longer terminates as soon as a test fails.
231 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
232 with PASS or FAIL lines for individual tests. A summary of the results is
233 printed, including a list of failing lists, and "make check" exits with
234 error status if there were any unexpected failures. "make check
235 stop-on-test-failure=y" may be used to keep the old behavior.
237 * The am33 port, which had not worked for several years, has been removed
240 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
241 supported; they now act the same as _DEFAULT_SOURCE (but generate a
242 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
243 conflicted with POSIX (support for which was removed in 2.19), the
244 interfaces those macros enabled remain available when compiling with
245 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
248 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
250 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
251 This may improve lock scaling of existing programs on TX capable systems.
252 The lock elision code is only built with --enable-lock-elision=yes and
253 then requires a GCC version supporting the TX builtins. With lock elision
254 default mutexes are elided via __builtin_tbegin, if the cpu supports
255 transactions. By default lock elision is not enabled and the elision code
258 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
259 copy the path argument. This allowed programs to cause posix_spawn to
260 deference a dangling pointer, or use an unexpected pathname argument if
261 the string was modified after the posix_spawn_file_actions_addopen
264 * All supported architectures now use the main glibc sysdeps directory
265 instead of some being in a separate "ports" directory (which was
266 distributed separately before glibc 2.17).
268 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
269 On configurations that support it (all Linux configurations), it's now
270 used regardless of the --enable-add-ons switch to configure. It is no
271 longer possible to build such configurations without pthreads support.
273 * Locale names, including those obtained from environment variables (LANG
274 and the LC_* variables), are more tightly checked for proper syntax.
275 setlocale will now fail (with EINVAL) for locale names that are overly
276 long, contain slashes without starting with a slash, or contain ".." path
277 components. (CVE-2014-0475) Previously, some valid locale names were
278 silently replaced with the "C" locale when running in AT_SECURE mode
279 (e.g., in a SUID program). This is no longer necessary because of the
282 * On x86-64, the dynamic linker's lazy-binding support is now compatible
283 with application code using Intel MPX instructions. (With all previous
284 versions, the MPX register state could be clobbered when making calls
285 into or out of a shared library.) Note that while the new dynamic
286 linker is compatible with all known x86 hardware whether or not it
287 supports Intel MPX, some x86 instruction-set emulators might fail to
288 handle the new instruction encodings. This is known to affect Valgrind
289 versions up through 3.9 (but will be fixed in the forthcoming 3.10
290 release), and might affect other tools that do instruction emulation.
292 * Support for loadable gconv transliteration modules has been removed.
293 The support for transliteration modules has been non-functional for
294 over a decade, and the removal is prompted by security defects. The
295 normal gconv conversion modules are still supported. Transliteration
296 with //TRANSLIT is still possible, and the //IGNORE specifier
297 continues to be supported. (CVE-2014-5119)
299 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
300 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
301 resulting a denial-of-service security vulnerability in applications which
302 use functions related to iconv. (CVE-2014-6040)
306 * The following bugs are resolved with this release:
308 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
309 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
310 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
311 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
312 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
313 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
314 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
315 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
316 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
317 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
318 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
319 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
320 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
321 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
322 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
323 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
324 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
325 16431, 16453, 16474, 16506, 16510, 16529
327 * Slovenian translations for glibc messages have been contributed by the
328 Translation Project's Slovenian team of translators.
330 * The public headers no longer use __unused nor __block. This change is to
331 support compiling programs that are derived from BSD sources and use
332 __unused internally, and to support compiling with Clang's -fblock
333 extension which uses __block.
335 * CVE-2012-4412 The strcoll implementation caches indices and rules for
336 large collation sequences to optimize multiple passes. This cache
337 computation may overflow for large collation sequences and may cause a
338 stack or buffer overflow. This is now fixed to use a slower algorithm
339 which does not use a cache if there is an integer overflow.
341 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
342 rules for large collation sequences to optimize multiple passes and falls
343 back to alloca if malloc fails, resulting in a possible stack overflow.
344 The implementation now falls back to an uncached collation sequence lookup
347 * CVE-2013-4788 The pointer guard used for pointer mangling was not
348 initialized for static applications resulting in the security feature
349 being disabled. The pointer guard is now correctly initialized to a
350 random value for static applications. Existing static applications need
351 to be recompiled to take advantage of the fix (bug 15754).
353 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
354 to the d_name member of struct dirent, or omit the terminating NUL
355 character. (Bugzilla #14699).
357 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
358 aligned_alloc functions could allocate too few bytes or corrupt the
359 heap when passed very large allocation size values (Bugzilla #15855,
362 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
363 for AF_INET6 has been fixed (Bugzilla #16072).
365 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
366 pap_CW, quz_PE, the_NP.
368 * Substantially revised locales: gd_GB, ht_HT
370 * The LC_ADDRESS field was updated to support country_car for almost all
373 * ISO 1427 definitions were updated.
375 * ISO 3166 definitions were updated.
377 * The localedef utility now supports --big-endian and --little-endian
378 command-line options to generate locales for a different system from that
379 for which the C library was built.
381 * Binary locale files now only depend on the endianness of the system for
382 which they are generated and not on other properties of that system. As a
383 consequence, binary files generated with new localedef may be incompatible
384 with old versions of the GNU C Library, and binary files generated with
385 old localedef may be incompatible with this version of the GNU C Library,
386 in the following circumstances:
388 + Locale files may be incompatible on m68k systems.
390 + Locale archive files (but not separate files for individual locales) may
391 be incompatible on systems where plain "char" is signed.
393 * The configure option --disable-versioning has been removed. Builds with
394 --disable-versioning had not worked for several years.
396 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
397 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
399 * SystemTap probes for malloc have been introduced.
401 * SystemTap probes for slow multiple precision fallback paths of
402 transcendental functions have been introduced.
404 * Support for powerpc64le has been added.
406 * The soft-float powerpc port now supports e500 processors.
408 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
410 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
411 set of header declarations that are enabled by default, even when other
412 feature test macros or compiler options such as -std=c99 would otherwise
413 disable some of those declarations.
415 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
416 conflict with POSIX. The libbsd-compat library (which was a dummy library
417 that did nothing) has also been removed.
419 * Preliminary documentation about Multi-Thread, Async-Signal and
420 Async-Cancel Safety has been added.
422 * Change of ABI data structures for s390 and s390x:
423 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
424 allow for future hardware extensions. All library functions that accept or
425 return these structures were versioned in order to provide backwards
426 compatibility with existing code. However, not all cases can be handled
427 with interface versioning. If an application embeds either structure into
428 another structure and that structure is passed to another compilation unit
429 which expects the newer larger-sized object then any access to the new
430 fields will result in undefined behaviour. Similarly any access to fields
431 that were moved by the enlarging of the structures will cause undefined
432 behaviour. To fix the undefined behaviour all objects that are part of the
433 final in-memory image must agree on the size of structures, and this may
434 require recompilation.
438 * The following bugs are resolved with this release:
440 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
441 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
442 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
443 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
444 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
445 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
446 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
447 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
448 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
449 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
450 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
451 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
452 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
455 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
456 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
457 Distributions can re-enable building and using pt_chown via the new configure
458 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
459 considerable security risks and should only be used if the distribution
460 understands and accepts the risks.
462 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
465 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
466 fixed (Bugzilla #15330).
468 * Add support for calling C++11 thread_local object destructors on thread
469 and program exit. This needs compiler support for offloading C++11
470 destructor calls to glibc.
472 * Improved worst case performance of libm functions with double inputs and
475 * Support for priority inherited mutexes in pthread condition variables on
476 non-x86 architectures.
478 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
480 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
482 * Optimized string functions for ARM. Implemented by Will Newton and
485 * Optimized libm functions for SPARC. Implemented by David S. Miller.
487 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
490 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
491 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
493 * Added a benchmark framework to track performance of functions in glibc.
495 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
496 It is based on draft TS 18661 and currently enabled as a GNU extension.
498 * On Linux, the clock function now uses the clock_gettime system call
499 for improved precision, rather than old times system call.
501 * Added support for version-3 tz format files. This is needed when using
502 the tz database release 2013e or later, and affects a few unusual cases --
503 currently only TZ='America/Godthab' for time stamps after 2037.
505 * Added new API functions pthread_getattr_default_np and
506 pthread_setattr_default_np to get and set the default pthread
507 attributes of a process.
509 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
510 This may improve lock scaling of existing programs on TSX capable systems.
511 When the --enable-lock-elision=yes parameter is specified at configure
512 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
515 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
516 availability). Implemented by Ryan S. Arnold.
518 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
522 * The following bugs are resolved with this release:
524 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
525 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
526 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
527 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
528 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
529 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
530 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
531 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
532 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
533 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
534 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
535 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
536 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
537 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
538 14879, 14889, 14893, 14898, 14914.
540 * Optimization of memcpy for MIPS.
542 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
543 EMFILE has been fixed (Bugzilla #14889).
545 * The add-on ports collection is now distributed in the "ports" subdirectory
546 of the main GNU C Library distribution, rather than separately.
548 * Port to ARM AArch64 contributed by Linaro.
550 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
551 Optimized versions of memcpy, memset, and memcmp added for System z10 and
553 Implemented by Andreas Krebbel.
555 * The new function secure_getenv allows secure access to the environment,
556 returning NULL if running in a SUID/SGID process. This function replaces
557 the internal function __secure_getenv.
559 * SystemTap static probes have been added into the dynamic linker.
560 Implemented by Gary Benson.
562 * Optimizations of string functions strstr, strcasestr and memmem.
563 Implemented by Maxim Kuvyrkov.
565 * The minimum Linux kernel version that this version of the GNU C Library
566 can be used with is 2.6.16.
568 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
569 powerpc POWER7. Implemented by Will Schmidt.
571 * New configure option --disable-nscd builds the C library such that it
572 never attempts to contact the Name Service Caching Daemon (nscd).
573 New configure option --disable-build-nscd avoids building nscd itself;
574 this is the default if --disable-nscd is used.
576 * Improved support for cross-compilation, including cross-testing and
577 bootstrap builds without a previously built glibc.
579 * Several testsuite tests are now able to test multiple IFUNC variants of an
580 interface, rather than just testing the one that would be chooen by
583 * New configure options --with-bugurl and --with-pkgversion, for
584 distributors to use to embed their bug-reporting and package version
585 information in --help and --version output.
587 * The ttyname and ttyname_r functions on Linux now fall back to searching for
588 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
589 allows creation of chroots without the procfs mounted on /proc.
591 * The `crypt' function now fails if passed salt bytes that violate the
592 specification for those values. On Linux, the `crypt' function will
593 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
594 enabled, and fail on encrypted strings using the MD5 or DES algorithm
595 when the mode is enabled.
597 * The `clock_*' suite of functions (declared in <time.h>) is now available
598 directly in the main C library. Previously it was necessary to link with
599 -lrt to use these functions. This change has the effect that a
600 single-threaded program that uses a function such as `clock_gettime' (and
601 is not linked with -lrt) will no longer implicitly load the pthreads
602 library at runtime and so will not suffer the overheads associated with
603 multi-thread support in other code such as the C++ runtime library.
605 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
610 * The following bugs are resolved with this release:
612 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
613 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
614 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
615 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
616 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
617 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
618 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
619 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
620 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
621 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
622 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
623 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
624 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
625 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
626 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
627 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
628 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
629 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
630 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
631 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
632 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
633 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
636 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
637 configuring glibc with:
638 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
639 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
640 Implemented by H.J. Lu.
644 + define static_assert
646 + do not declare gets
648 + declare at_quick_exit and quick_exit also for ISO C11
650 + aligned_alloc. NB: The code is deliberately allows the size parameter
651 to not be a multiple of the alignment. This is a moronic requirement
652 in the standard but it is only a requirement on the caller, not the
657 + uchar.h support added
659 + CMPLX, CMPLXF, CMPLXL added
661 Implemented by Ulrich Drepper.
663 * Support for the IA-64 has been moved to ports.
665 * Remove support for anything but ELF binary format
667 * Checking versions of poll, ppoll added.
668 Implemented by Ulrich Drepper.
670 * More generic and 64-bit performance optimizations to math functions.
671 Implemented by Ulrich Drepper.
673 * New configure option --enable-obsolete-rpc makes the deprecated RPC
674 headers and functions available at compile time as they were before
675 version 2.14. This option will be removed at some time in the future
676 after the TI-RPC library becomes fully sufficient for the needs of
677 existing applications.
679 * Compatibility code for Linux kernel versions before 2.4 has been removed.
680 Note that glibc is not expected to work with any Linux kernel version
683 * New header <sys/auxv.h> and function getauxval allowing easy access to
684 the AT_* key-value pairs passed from the Linux kernel. The header also
685 defines the HWCAP_* bits associated with the AT_HWCAP key.
687 * New locales: mag_IN
689 * New configure option --enable-systemtap builds SystemTap static probes
690 into libc for setjmp and longjmp and into libpthread for various operations.
691 So far the setjmp/longjmp probes and some of the libpthread probes are
692 provided only for i*86 and x86_64.
693 Implemented by Roland McGrath and Rayson Ho.
695 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
697 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
700 * More optimized functions for SPARC. Implemented by David S. Miller.
702 * Improved support for cross-compilation, especially bootstrap builds
703 without a previously built glibc.
705 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
706 Chris Metcalf from Tilera.
708 * Support for the old ARM ABI has been removed from ports. Only the EABI is
709 now supported for ARM processors.
711 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
712 as the name of the dynamic linker, to distinguish it from the
713 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
715 * Support for CRIS has been removed from ports.
717 * A new class of installed header has been documented for low-level
718 platform-specific functionality. PowerPC added the first instance with a
719 function to provide time base register access. Contributed by Tulio
720 Magno Quites Machado Filho.
722 * ix86 configurations now install header files that are consistent with
723 what x86-64 configurations install. These same header files can be used
724 for -m32, -m64, or -mx32 builds.
725 Contributed by H.J. Lu.
727 * Math library bug fixes. A thorough audit of all open math library bugs was
728 conducted by Joseph Myers. Significant progress was made on many math
729 library bugs resulting in more accurate exceptions and function results.
730 Many thanks to all those that contributed including Andreas Jaeger for his
731 patch review and work on the x87 trigonometric instruction issues.
733 * Timezone data is no longer installed. Timezone-related binaries and scripts
734 will continue to be installed. Users should obtain their timezone data from
735 their distribution provider or from the tzdata package at
736 <ftp://munnari.oz.au/pub/>.
740 * The following bugs are resolved with this release:
742 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
743 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
744 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
745 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
746 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
747 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
748 13484, 13506, 13515, 13523, 13524, 13538, 13540
750 * New program pldd to list loaded object of a process
751 Implemented by Ulrich Drepper.
753 * Add nss_db support back to glibc. No more dependency on Berkeley db
754 and support for initgroups lookups.
755 Implemented by Ulrich Drepper.
757 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
758 Contributed by HJ Lu.
760 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
761 Contributed by HJ Lu.
763 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
764 on x86-32 and x86-64.
765 Contributed by Liubov Dmitrieva.
767 * Optimized strchr and strrchr for SSE on x86-32.
768 Contributed by Liubov Dmitrieva.
770 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
771 for x86-64 and x86-32.
772 Contributed by Liubov Dmitrieva.
774 * New interfaces: scandirat, scandirat64
775 Implemented by Ulrich Drepper.
777 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
778 Implemented by Ulrich Drepper.
780 * nscd now also caches the netgroup database.
781 Implemented by Ulrich Drepper.
783 * Integrate libm with gcc's -ffinite-math-only option.
784 Implemented by Ulrich Drepper.
786 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
787 to math functions. Implemented by Ulrich Drepper.
789 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
790 Implemented by Ulrich Drepper.
792 * New Linux interfaces: process_vm_readv, process_vm_writev
794 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
795 Implemented by Ulrich Drepper.
797 * Optimized nearbyint and strcasecmp for PPC.
798 Implemented by Adhemerval Zanella.
800 * New locales: bho_IN, unm_US, es_CU, ta_LK
804 * The following bugs are resolved with this release:
806 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
807 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
808 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
809 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
810 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
811 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
812 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
813 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
814 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
815 12795, 12811, 12813, 12814, 12841
817 * The RPC implementation in libc is obsoleted. Old programs keep working
818 but new programs cannot be linked with the routines in libc anymore.
819 Programs in need of RPC functionality must be linked against TI-RPC.
820 The TI-RPC implementation is IPv6 enabled and there are other benefits.
822 Visible changes of this change include (obviously) the inability to link
823 programs using RPC functions without referencing the TI-RPC library and the
824 removal of the RPC headers from the glibc headers.
825 Implemented by Ulrich Drepper.
827 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
828 syncfs, setns, sendmmsg
830 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
831 yue_HK, lij_IT, mhr_RU
833 * New encodings: CP770, CP771, CP772, CP773, CP774
835 * New program sotruss to trace calls through PLTs
836 Implemented by Ulrich Drepper.
838 * The malloc hook implementation is marked deprecated and will be removed
839 from the default implementation in the next version. The design never
840 worked ever since the introduction of threads. Even programs which do
841 not create threads themselves can use multiple threads created internally.
845 * The following bugs are resolved with this release:
847 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
848 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
849 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
850 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
853 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
855 * POWER7 optimizations: memset, memcmp, strncmp
857 * New optimized string functions for x86-64: strnlen (SSE2),
858 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
859 Implemented by Ulrich Drepper.
863 * The following bugs are resolved with this release:
865 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
866 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
867 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
868 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
869 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
870 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
871 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
872 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
874 * New interfaces: pthread_getname_np, pthread_setname_np
876 * New Linux interface: recvmmsg
878 * STT_GNU_IFUNC implemented for Sparc by David Miller.
880 * The dynamic linker now recognizes supported ABI versions from the
881 EI_ABIVERSION field in the ELF header.
882 Implemented by Ulrich Drepper.
884 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
885 will not be used to fill in password fields in the passwd.byname replies.
886 Instead it is used to synthesize the shadow.byname table, should it be
887 missing. This is a useful mode in some installations involving Solaris.
888 Implemented by Ulrich Drepper.
890 * New locales: kok_IN, sq_MK, cv_RU
894 * The following bugs are resolved with this release:
896 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
897 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
898 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
899 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
900 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
901 10789, 10817, 10823, 10840, 10847
903 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
905 Implemented by Ulrich Drepper.
907 * Checking version of longjmp added that fails if an uninitialized stack
908 frame would be created. Implemented by Ulrich Drepper.
910 * STT_GNU_IFUNC is now supported in static executables.
911 Implemented by H.J. Lu.
913 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
915 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
916 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
917 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
918 Contributed by H.J. Lu.
920 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
921 Implemented by Ulrich Drepper.
923 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
925 Contributed by H.J. Lu.
927 * Support for fma instruction in AVX on x86-64.
928 Implemented by H.J. Lu and Ulrich Drepper.
930 * AVX support in x86-64 auditing support in ld.so.
931 Implemented by H.J. Lu.
933 * STB_GNU_UNIQUE support added.
934 Implemented by Ulrich Drepper.
936 * Implement second fallback mode for optimized DNS lookup for even more
937 broken environments. If two requests from the same port are not
938 handled correctly close the socket and open a new one before sending
939 the second request. The 'single-request-reopen' option in /etc/resolv.conf
940 can be used to select this mode right away, instead of rediscovering the
941 necessity is every process again.
942 Implemented by Ulrich Drepper.
944 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
945 Implemented by Adam Tkac.
947 * Optimized iconv conversions for S390x.
948 Implemented by Andreas Krebbel.
950 * Using condvars with PI mutexes is now more efficient due to kernel
951 support for requeueing to PI futexes. NPTL support added for x86-64.
952 Implemented by Ulrich Drepper.
954 * New locales: ps_AF, my_MM
958 * The following bugs are resolved with this release:
960 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
961 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
962 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
963 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
964 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
966 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
967 Implemented by Ulrich Drepper.
969 * New Linux interfaces: accept4, fallocate, fallocate64.
970 Implemented by Ulrich Drepper.
972 * Correct declarations of string function when used in C++ code. This
973 could lead to compile errors for invalid C++ code.
975 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
978 * New POSIX 2008 interface: psiginfo
979 Implemented by Ulrich Drepper.
981 * New ISO C++1x interfaces: quick_exit, at_quick_exit
982 Implemented by Ulrich Drepper.
984 * Support for selecting between multiple function definitions at runtime
985 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
987 * The libcrypt library can now use the hash function implementations in
988 NSS. Implemented by Ulrich Drepper.
990 * The malloc implementation can be compiled to be less memory efficient
991 but higher performing in multi-threaded programs.
992 Implemented by Ulrich Drepper.
994 * New locales: nan_TW@latin, ks_IN
996 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
997 Implemented by Ulrich Drepper.
999 * Extended printf hook support. It is possible to use user-defined types
1000 and extend existing format specifiers.
1001 Implemented by Ulrich Drepper.
1003 * Handling for group shadow files has been added.
1004 Implemented by Ulrich Drepper.
1006 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1007 servers (the case, e.g., for some people using the built-in DNS
1008 server in ADSL modems/routers). There is a once-per-process timeout
1009 in case of a broken server. To avoid it, users can run nscd or put
1010 'options single-request' in /etc/resolv.conf.
1011 Implemented by Ulrich Drepper.
1015 * The following bugs are resolved with this release:
1017 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1018 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1019 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1020 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1021 6968, 6974, 6980, 6995, 7008, 7009, 7029
1023 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1024 up at the same time. Implemented by Ulrich Drepper.
1026 * TLS descriptors for LD and GD on x86 and x86-64.
1027 Implemented by Alexandre Oliva.
1029 * getaddrinfo now handles DCCP and UDPlite.
1030 Implemented by Ulrich Drepper.
1032 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1033 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1034 Implemented by Ulrich Drepper.
1036 * New implementation of memmem, strstr, and strcasestr which is O(n).
1037 Implemented by Eric Blake.
1039 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1041 * Implement "e" option for popen to open file descriptor with the
1042 close-on-exec flag set. Implemented by Ulrich Drepper.
1044 * Implement "b" mode for fmemopen. In this mode writes writes don't
1045 implicitly add a NUL byte and seeks from the end of the buffer really
1046 use the buffer end, not the string length as the basis.
1047 Implemented by Ulrich Drepper.
1049 * Many functions, exported and internal, now atomically set the close-on-exec
1050 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1052 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1054 Implemented by Pravin Satpute.
1056 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1060 * The following bugs are resolved with this release:
1062 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1063 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1064 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1065 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1066 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1067 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1068 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1070 * New locales: bo_CN, bo_IN, shs_CA.
1072 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1074 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1075 Implemented by Pravin Satpute.
1077 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1079 * nscd caches now all timeouts for DNS entries
1080 Implemented by Ulrich Drepper.
1082 * nscd is more efficient and wakes up less often.
1083 Implemented by Ulrich Drepper.
1085 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1086 vdprintf, and obstack_vprintf.
1087 Implemented by Jakub Jelinek.
1089 * Faster memset for x86-64.
1090 Implemented by Harsha Jagasia and H.J. Lu.
1092 * Faster memcpy on x86.
1093 Implemented by Ulrich Drepper.
1095 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1096 Implemented by Ulrich Drepper.
1098 * Faster sqrt and sqrtf implemention for some PPC variants.
1099 Implemented by Steven Munroe.
1103 * The following bugs are resolved with this release:
1105 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1106 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1107 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1108 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1109 5071, 5103, 5104, 5112, 5113, 5184, 5186
1111 * More checking functions: fread, fread_unlocked, open*, mq_open.
1112 Implemented by Jakub Jelinek and Ulrich Drepper.
1114 * Extend fortification to C++. Implemented by Jakub Jelinek.
1116 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1117 by not recognizing 'a' as a modifier when those specs are requested.
1118 Implemented by Jakub Jelinek.
1120 * PPC optimizations to math and string functions.
1121 Implemented by Steven Munroe.
1123 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1124 options to be passed. Implemented by Ulrich Drepper.
1126 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1128 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1129 Implemented by Ulrich Drepper.
1131 * Handle private futexes in the NPTL implementation.
1132 Implemented by Jakub Jelinek and Ulrich Drepper.
1134 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1135 Implemented by Roland McGrath and Ulrich Drepper.
1137 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1139 * SHA-256 and SHA-512 based password encryption.
1140 Implemented by Ulrich Drepper.
1142 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1143 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1146 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1147 Implemented by Ulrich Drepper.
1151 * The following bugs are resolved with this release:
1153 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1154 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1155 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1156 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1157 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1158 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1159 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1162 * New Linux interfaces: epoll_pwait, sched_getcpu.
1164 * New generic interfaces: strerror_l.
1166 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1170 * The following bugs are resolved with this release:
1172 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1173 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1174 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1175 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1176 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1177 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1178 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1179 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1180 3225, 3251, 3252, 3253, 3273
1182 * For Linux, the sorting of addresses returned by getaddrinfo now also
1183 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1184 Implemented by Ulrich Drepper.
1186 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1187 Implemented by Ulrich Drepper.
1189 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1191 * New iconv module for MIK. Contributed by Alexander Shopov.
1193 * For sites with broken group and/or passwd database, the auto-propagate
1194 option of nscd can prevent creating ID lookup entries from the results
1195 of a name lookup and vice versa. This usually is no problem but some
1196 site might have problems with the default behavior.
1197 Implemented by Ulrich Drepper.
1199 * Iterating over entire database in NIS can be slow. With the
1200 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1201 to trade time for memory. The entire database will be read at once.
1202 Implemented by Ulrich Drepper.
1204 * The interfaces introduced in RFC 3542 have been implemented by
1207 * Support for the new ELF hash table format was added by Ulrich Drepper.
1209 * Support for priority inheritance mutexes added by Jakub Jelinek and
1212 * Support for priority protected mutexes added by Jakub Jelinek.
1214 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1215 or_IN, csb_PL, fy_NL, sr_ME.
1219 * More overflow detection functions.
1221 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1222 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1224 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1225 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1226 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1227 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1228 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1229 by Masahide Washizawa.
1231 * It is now possible to install audit libraries for the dynamic linker using
1232 LD_AUDIT. Implemented by Ulrich Drepper.
1234 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1235 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1236 For a libc and libpthread that works well on Linux 2.4 kernels, we
1237 recommend using the stable 2.3 branch.
1239 * The new function open_wmemstream acts like open_memstream,
1240 but uses a wchar_t wide character buffer.
1242 * The new function ppoll is an improved version of poll, similar to pselect.
1244 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1245 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1246 renameat, unlinkat, linkat, symlinkat, readlinkat.
1248 * New Linux kernel system calls: unshare,
1249 inotify_init, inotify_add_watch, inotify_rm_watch.
1251 * The euidaccess function is now also known by the alias eaccess,
1252 for compatibility with some other systems.
1254 * Timezone data updated to 2006b version.
1258 * The following bugs are resolved with this release:
1260 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1261 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1262 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1263 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1264 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1265 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1267 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1269 * As of this release, GCC 4 can be used to compile the C Library.
1271 * Timezone data updated to 2005m version.
1275 * The following bugs are resolved with this release:
1277 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1278 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1279 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1280 777, 787, 821, 822, 823, 825
1282 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1286 * Support for RFC 3678. Real implementations exist only for Linux so far.
1287 Implemented by Ulrich Drepper.
1289 * nscd can now cache entries persistently. Expiring entries are reloaded.
1290 For speedups the cache can be shared in memory with client processes.
1291 Implemented by Ulrich Drepper.
1293 * nscd can now perform SELinux checks.
1294 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1296 * getaddrinfo queries are now cached. Canonical name lookup is performed
1298 Implemented by Ulrich Drepper.
1300 * The nothrow function attribute is used when headers are used by gcc when
1301 compiling C code. This can avoid significant amounts of exception
1304 * The malloc functions perform more error checking and are stricter when
1305 it comes to reacting on errors. The default action is to terminate
1306 the process after showing an error message. Implemented by Ulrich Drepper.
1308 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1309 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1311 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1312 namespaces using the new function dlmopen(). This feature is of course,
1313 like most other dynamic loading functionality, not available in statically
1314 linked applications. Implemented by Ulrich Drepper.
1316 * Low-overhead boundary checking variants of string and some stdio functions
1317 were added. These are to be used in conjunction with a gcc patch by
1318 Jakub Jelinek which adds calls to these functions if possible.
1319 Implemented by Jakub Jelinek and Ulrich Drepper.
1321 * Old code for several operating systems and machine architectures that
1322 have not been in working condition in a long time have been removed from
1323 the main source tree maintained by the GNU C Library's maintainers.
1324 These files are now reside in the separate `ports' source module
1325 that is usable as an add-on when building the library.
1329 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1330 interrogate the dynamic linker, compatible with the Solaris interface.
1332 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1333 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1335 * getifaddrs now uses the netlink interface on Linux to get its information.
1336 Implemented by Thorsten Kukuk.
1338 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1339 Implemented by Ulrich Drepper.
1341 * support for non-executable stacks on x86 has been added. Changes mostly
1344 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1347 * getaddrinfo now performs destination address selection according to
1352 * Thread-safe interfaces for many functions that access locale data
1353 were added in version 2.3, but these features were omitted from NEWS.
1354 Many functions have variants with an `_l' suffix that take a `locale_t'
1355 object as a parameter rather than consulting the current locale.
1356 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1357 create and maintain `locale_t' objects. Additionally, the new function
1358 `uselocale' sets "the current locale" (as used by functions not so
1359 parameterized) set for an individual thread. These features were added
1360 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1362 * The functions getresuid, getresgid, setresuid, and setresgid, which
1363 have long been available on Linux, are now declared in <unistd.h>
1364 and are now also available on the Hurd.
1366 * ELF thread-local storage support (TLS) now works on x86-64.
1368 * The new dynamic string token $LIB is expanded in shared library names.
1369 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1371 * Aldy Hernandez contributed complete software floating point support for
1372 PowerPC machines with no FPU.
1374 * fexecve is implemented on Linux.
1376 * The `btowc' function should work at least twice as fast due to
1377 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1379 * With approriate thread add-ons cancelable functions are now implemented
1380 in libc.so as well. No need to call the function in libpthread. This
1381 change allowed to finally disable the incorrect and expensive handling
1382 of weak definition in ld.so.
1384 * Yet more PLT entries in libc.so have been removed. We finally arrived
1385 at the bare minimum. Startup times improved appropriately.
1387 * Support for the new Linux/x86 system call interface was added. The
1388 AT_SYSINFO auxiliary vector entry is recognized and handled.
1392 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1395 * iconv (the program and the interface) now accepts empty names (excluding
1396 options like //TRANSLIT) to mean "use charset of current locale".
1398 * localedef can now transliterate characters in strings which are not in
1399 the provided charmap. The information from the input locale is used.
1401 * Prelinking support was added for ELF targets. This requires additional
1402 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1404 * Read-only stdio streams now use mmap to speed up operation by eliminating
1405 copying and buffer underflows. To use add 'm' to the mode string of
1406 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1408 * The malloc functions were completely rewritten by Wolfram Gloger based
1409 on Doug Lea's malloc-2.7.0.c.
1411 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1412 implementation of regex.
1414 * Bruno Haible upgraded the iconv and locale implementation to support
1417 * Contents of the LC_* and LANG environment variables in the CEN style are
1418 not recognized anymore. It never was used. Change by Ulrich Drepper.
1420 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1421 thread-local storage (TLS) ABI on some platforms.
1422 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1424 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1425 EUC-JISX0213, and TSCII.
1427 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1428 BSD-compatible interface for getting all network interface addresses.
1429 Implementation for IPv4 by Roland McGrath.
1431 * Loading of locale data is faster due to the introduction of a locale
1432 archive. Implemented by Roland McGrath and Ulrich Drepper.
1434 * Startup times are significantly reduced by not using exported functions
1435 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1438 * Steven Munroe contributed a port to PowerPC64/Linux.
1442 * The Hurd now uses the GNU libio implementation of stdio rather than the
1443 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1445 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1446 with the same behavior as the Linux system call of the same name.
1450 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1451 128-bit long double format.
1453 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1454 IBM1161, and IBM1162 charsets.
1456 * Andreas Jaeger contributed a port to x86-64/Linux.
1458 * Peter Bruin contributed a port to PowerPC/Hurd.
1460 * libc functions using I/O streams now can handle wide-oriented streams
1463 * optimizations in the dynamic linker. Binaries created by recent binutils
1464 versions start up quicker due to reduced time spent on relocations.
1466 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1470 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1471 asinh, atanh, j0 for the 128-bit long double format.
1473 * Bruno Haible updated all the code handling Unicode in some form to
1474 support Unicode 3.1.
1476 * Speed of regex for single-byte locales is back to previous levels.
1477 Patch by Isamu Hasegawa.
1479 * Alpha, SPARC, and IA-64 now also using floating stacks.
1481 * Startup time of internationalized applications greatly improved through
1482 iconv cache. Use iconvconfig to generate the cache file.
1483 Contributed by Ulrich Drepper.
1485 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1486 severe performance problems. Patch by David Mosberger.
1488 * The Hurd port got a lot more functionality like AIO, various stdio
1489 extensions, etc. Mainly done by Roland McGrath.
1491 * mtrace can now lookup symbols in shared libraries.
1495 * Intel's IA-64 math library is largely integrated. It provides fast and
1496 accurate implementatations for most basic and standard math functions
1497 in float, double, and long double format.
1499 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1500 and asin for the 96-bit long double format and asin, log, tan for the
1501 128-bit long double format.
1503 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1504 The basic double functions exist today. Contributed by Abraham Ziv
1505 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1506 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1508 * An asynchronous name lookup library was added. The interface is designed
1509 after POSIX AIO. The proposal was circulated beforehand to get comments.
1510 No negative ones came in. Implemented by Ulrich Drepper.
1512 * Port to S390/64bit contributed by Martin Schwidefsky
1513 <schwidefsky@de.ibm.com>.
1515 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1516 of functions for Linux/IA-64.
1518 * The RPC code is now thread safe. Threads can now use the same service
1519 of different services at the same time. Patch by Eric Norum
1520 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1522 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1523 family of functions for Linux/S390.
1525 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1526 of functions for Linux/x86.
1528 * Port to Linux/CRIS contributed by Axis Communications.
1532 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1533 we can now check for namespace violations and missing declarations. The
1534 result is that almost all headers are now Unix-compliant (as defined in
1535 the upcoming XPG6). The negative side is that some programs might need
1536 corrections, too, if they depend on the incorrect form of the headers in
1537 previous versions which defined too many symbols and included too many
1540 * regex now handles multibyte character sets correctly.
1541 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1543 * iconv (the program) does now conform to the upcoming XPG6 and handles
1544 charmaps. Instead of the charset names the path of charmaps can be
1545 provided and the conversion happens based on this data.
1546 Contributed by Ulrich Drepper.
1548 * The locale program now provides detailed information about the installed
1553 only lists the names of the supported locales
1557 provides details such as country, language, and codeset name.
1558 Contributed by Ulrich Drepper.
1562 * The gencat program now parses the input file according to the charset
1563 selected by the LC_CTYPE category. This is important for stateful
1564 character sets. To make generating catalogs easier there is a way
1565 to overwrite the charset selected by the locale: before the first
1566 message or $ quote line the catalog can contain a line like
1568 $ codeset=ISO-8859-2
1570 to select the charset (ISO-8859-2 in this case).
1572 Implemented by Shinya Hanataka and Ulrich Drepper.
1574 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1575 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1576 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1578 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1579 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1581 * The LANGUAGE environment variable is now ignored unless the locale is
1582 changed from the default "C" locale.
1584 * The usual bug fixes.
1588 * Greg McGary added runtime support for bounds checking using gcc's
1589 new -fbounded-pointers option. ix86 target is complete. PowerPC
1592 * Thorsten Kukuk added secure mode support to nscd.
1594 * The Berkeley db libraries have been removed.
1596 Related, the nss_db module is now in a separate package since it
1597 obviously requires a database library being available.
1599 * Wide character I/O streams implemented by Ulrich Drepper.
1601 * Functions from the extended socket API added by Ulrich Drepper.
1603 * Functions feenableexcept and fedisableexcept to control the
1604 behaviour of individual exceptions have been added by Andreas Jaeger.
1606 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1608 * The resolver code has been updated from bind 8.2.3-T5B which supports
1609 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1612 This change could in some situations effect backward compatibility. Since
1613 now `_res' is a thread-local instead of a global variable, modifying it
1614 in one thread does not have any effect in other threads.
1616 The resolver library was also extended to allow IPv6 as the transport
1617 protocol for the requests. This work was done by Stig Venaas.
1619 * Compatibility code for K&R C compilers has been removed from the
1620 header files. A ISO C compiler is needed to use the library
1621 (conforming to either C89 or C99 standard).
1623 * Complete rewrite of the localedef program to support multibyte character
1624 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1625 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1626 Implemented by Ulrich Drepper.
1628 Bruno Haible significantly improved the generation and use of the data
1629 structures for the wide character tables.
1631 * Plural handling in gettext implemented by Ulrich Drepper.
1633 * The utmp daemon has been removed.
1635 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1637 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1640 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1642 * POSIX barriers implemented by Kaz Kylheku.
1644 * POSIX spawn function family implemented by Ulrich Drepper.
1646 * POSIX spinlocks are now available.
1648 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1650 * the configure option --enable-kernel=X.Y.Z allows to strip out
1651 compatibility for kernel versions before X.Y.Z. This is currently only
1652 implemented for Linux.
1654 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1655 field sin6_scope_id. This means that all programs using IPv6 should be
1656 recompiled. Don't expect binary compatibility with previous glibc
1659 * various conversion modules for IBM character sets contributed by
1662 * IA-64 port by Jes Sorensen and HJ Lu.
1676 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1678 * New xdr functions are added; some rpc functions are now 64bit clean.
1680 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1682 * Fixed known incompatibilities with glibc 2.0.
1684 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1686 * Optimized a number of functions (especially the ELF dynamic loader).
1688 * Update timezone data files.
1690 * lots of charmaps corrections
1692 * some new locale definitions and charmaps
1697 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1698 conform to POSIX member type requirements. Symbol versions have been
1699 adjusted as needed within the library, and for direct use by applications,
1700 but there is potential for problems if third-party libraries use
1701 struct timeval as part of their interface. This does not present
1702 a problem for X and other "essential" system libraries.
1704 * An additional locale model to support C++ Standard Library locale
1705 model and probably more was implemented by Ulrich Drepper.
1707 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1710 * Miles Bader provided the `argp' function family to support hierachical
1711 command line argument parsing, layered on top of getopt.
1713 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1715 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1718 * scanf recognizes the %a and %A format for scanning floating point numbers.
1720 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1721 information and interfaces for the available integer types.
1723 * about 130 new math functions were added to implement the ISO C9x math
1726 * the new header <complex.h> contains definitions of the complex math
1727 functions from ISO C 9X.
1729 * the new header <tgmath.h> defines generic macros to use complex or
1730 real valued functions.
1732 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1734 * Andreas Jaeger provided a test suite for the math library.
1736 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1738 * Ulrich Drepper added character set conversion functions (iconv).
1740 * Optimized string functions have been added.
1742 * The localedata addon is now part of glibc.
1744 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1746 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1747 daemon for NSS (nscd).
1749 Missing a better place here are some numbers on improvements. Under
1750 Linux 2.1.125 un-tar-ing the kernel sources takes
1754 using local files 12.19s 6.88s 22.91s
1756 using NIS 13.92s 8.91s 26.34s
1758 using NIS & nscd 10.37s 7.34s 25.30s
1760 using NIS+ 27.57s 30.37s 640.46s
1762 using NIS+ & nscd 10.25s 7.83s 26.51s
1764 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1766 Keep in mind that non-namelookup related operations dominate above times.
1767 It was just a common complain that using NIS+ unpacking the kernel is
1770 [1] The old nscd implementation is not available anymore since it was
1771 distributed with glibc up to version 2.0.98 and thus is now replaced.
1773 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1775 * Mark Kettenis provided a Hesiod NSS module.
1777 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1778 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1780 * rcmd can now handle netgroups (Dick Streefland).
1782 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1785 * Support for the IPv6 protocol has been added to the socket API, as per the
1786 latest draft standards.
1788 * Support for Linux 2.2 has been added.
1790 * Interface changes relative to the latest 2.0.x release:
1791 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1792 addseverity NEW: Unix98
1793 alphasort64 NEW: LFS
1794 argp_err_exit_status NEW: argp, GNU ext
1795 argp_error NEW: argp, GNU ext
1796 argp_failure NEW: argp, GNU ext
1797 argp_help NEW: argp, GNU ext
1798 argp_parse NEW: argp, GNU ext
1799 argp_program_bug_address NEW: argp, GNU ext
1800 argp_program_version NEW: argp, GNU ext
1801 argp_program_version_hook NEW: argp, GNU ext
1802 argp_state_help NEW: argp, GNU ext
1803 argp_usage NEW: argp, GNU ext
1804 authdes_create NEW: Secure RPC
1805 authdes_getucred NEW: Secure RPC
1806 authdes_pk_create NEW: Secure RPC
1807 backtrace NEW: GNU ext.
1808 backtrace_symbols NEW: GNU ext.
1809 backtrace_symbols_fd NEW: GNU ext.
1811 cacosf NEW: ISO C 9x
1812 cacosh NEW: ISO C 9x
1813 cacoshf NEW: ISO C 9x
1814 cacoshl NEW: ISO C 9x
1815 cacosl NEW: ISO C 9x
1822 casinf NEW: ISO C 9x
1823 casinh NEW: ISO C 9x
1824 casinhf NEW: ISO C 9x
1825 casinhl NEW: ISO C 9x
1826 casinl NEW: ISO C 9x
1828 catanf NEW: ISO C 9x
1829 catanh NEW: ISO C 9x
1830 catanhf NEW: ISO C 9x
1831 catanhl NEW: ISO C 9x
1832 catanl NEW: ISO C 9x
1833 cbc_crypt NEW: Secure RPC
1837 ccoshf NEW: ISO C 9x
1838 ccoshl NEW: ISO C 9x
1844 cimagf NEW: ISO C 9x
1845 cimagl NEW: ISO C 9x
1846 clearerr_locked REMOVED
1847 clntunix_create NEW: sunrpc ext
1849 clog10 NEW: ISO C 9x
1850 clog10f NEW: ISO C 9x
1851 clog10l NEW: ISO C 9x
1861 cprojf NEW: ISO C 9x
1862 cprojl NEW: ISO C 9x
1864 crealf NEW: ISO C 9x
1865 creall NEW: ISO C 9x
1870 csinhf NEW: ISO C 9x
1871 csinhl NEW: ISO C 9x
1874 csqrtf NEW: ISO C 9x
1875 csqrtl NEW: ISO C 9x
1879 ctanhf NEW: ISO C 9x
1880 ctanhl NEW: ISO C 9x
1882 des_setparity NEW: Secure RPC
1883 ecb_crypt NEW: Secure RPC
1884 endutxent NEW: Unix98
1886 exp10f NEW: ISO C 9x
1887 exp10l NEW: ISO C 9x
1891 fattach NEW: STREAMS
1892 fdetach NEW: STREAMS
1896 feclearexcept NEW: ISO C 9x
1897 fegetenv NEW: ISO C 9x
1898 fegetexceptflag NEW: ISO C 9x
1899 fegetround NEW: ISO C 9x
1900 feholdexcept NEW: ISO C 9x
1902 feraiseexcept NEW: ISO C 9x
1903 ferror_locked REMOVED
1904 fesetenv NEW: ISO C 9x
1905 fesetexceptflag NEW: ISO C 9x
1906 fesetround NEW: ISO C 9x
1907 fetestexcept NEW: ISO C 9x
1908 feupdateenv NEW: ISO C 9x
1909 fflush_locked REMOVED
1913 fgets_unlocked NEW: GNU ext.
1914 fileno_locked REMOVED
1926 fputc_locked REMOVED
1927 fputs_unlocked NEW: GNU ext.
1928 fread_unlocked NEW: GNU ext.
1933 fstatvfs NEW: Unix98
1937 ftruncate64 NEW: LFS
1939 fwrite_unlocked NEW: GNU ext.
1940 gai_strerror NEW: IPv6
1944 getchar_locked REMOVED
1946 getdate_err NEW: Unix98
1947 getdate_r NEW: GNU ext.
1949 getnameinfo NEW: IPv6
1950 getnetname NEW: Secure RPC
1951 getpmsg NEW: STREAMS
1952 getpt NEW: Unix98 PTY
1953 getrlimit64 NEW: LFS
1954 getutxent NEW: Unix98
1955 getutxid NEW: Unix98
1956 getutxline NEW: Unix98
1957 glob64 NEW: GNU ext.
1958 globfree64 NEW: GNU ext.
1959 gnu_get_libc_release NEW: GNU ext.
1960 gnu_get_libc_version NEW: GNU ext.
1961 grantpt NEW: Unix98 PTY
1962 host2netname NEW: Secure RPC
1964 iconv_close NEW: iconv
1965 iconv_open NEW: iconv
1966 if_freenameindex NEW: IPv6
1967 if_indextoname NEW: IPv6
1968 if_nameindex NEW: IPv6
1969 if_nametoindex NEW: IPv6
1970 in6addr_any NEW: IPv6
1971 in6addr_loopback NEW: IPv6
1972 inet6_isipv4mapped NEW: IPv6
1973 isastream NEW: STREAMS
1974 iswblank NEW: GNU ext.
1975 key_decryptsession NEW: Secure RPC
1976 key_decryptsession_pk NEW: Secure RPC
1977 key_encryptsession NEW: Secure RPC
1978 key_encryptsession_pk NEW: Secure RPC
1979 key_gendes NEW: Secure RPC
1980 key_get_conv NEW: Secure RPC
1981 key_secretkey_is_set NEW: Secure RPC
1982 key_setnet NEW: Secure RPC
1983 key_setsecret NEW: Secure RPC
1984 llrint NEW: ISO C 9x
1985 llrintf NEW: ISO C 9x
1986 llrintl NEW: ISO C 9x
1987 llround NEW: ISO C 9x
1988 llroundf NEW: ISO C 9x
1989 llroundl NEW: ISO C 9x
1994 lrintf NEW: ISO C 9x
1995 lrintl NEW: ISO C 9x
1996 lround NEW: ISO C 9x
1997 lroundf NEW: ISO C 9x
1998 lroundl NEW: ISO C 9x
2000 makecontext NEW: Unix98
2001 mempcpy NEW: GNU ext.
2004 modify_ldt NEW: kernel
2008 nearbyint NEW: ISO C 9x
2009 nearbyintf NEW: ISO C 9x
2010 nearbyintl NEW: ISO C 9x
2011 netname2host NEW: Secure RPC
2012 netname2user NEW: Secure RPC
2013 nexttoward NEW: ISO C 9x
2014 nexttowardf NEW: ISO C 9x
2015 nexttowardl NEW: ISO C 9x
2019 passwd2des NEW: Secure RPC
2021 pow10f NEW: GNU ext.
2022 pow10l NEW: GNU ext.
2025 printf_size NEW: GNU ext.
2026 printf_size_info NEW: GNU ext.
2027 profil_counter REMOVED
2028 pthread_mutexattr_getkind_np REPLACED
2029 pthread_mutexattr_setkind_np REPLACED
2030 ptsname NEW: Unix98 PTY
2031 ptsname_r NEW: Unix98 PTY
2033 putchar_locked REMOVED
2034 putgrent NEW: GNU ext.
2036 putpmsg NEW: STREAMS
2037 pututxline NEW: Unix98
2041 readdir64_r NEW: LFS
2042 remquo NEW: ISO C 9x
2043 remquof NEW: ISO C 9x
2044 remquol NEW: ISO C 9x
2046 roundf NEW: ISO C 9x
2047 roundl NEW: ISO C 9x
2049 scalbln NEW: ISO C 9x
2050 scalblnf NEW: ISO C 9x
2051 scalblnl NEW: ISO C 9x
2053 sendfile NEW: kernel
2054 setcontext NEW: Unix98
2055 setrlimit64 NEW: LFS
2056 setutxent NEW: Unix98
2058 sigignore NEW: Unix98
2059 sigqueue NEW: POSIX.1b
2060 sigrelse NEW: Unix98
2061 sigset NEW: POSIX.1b
2062 sigtimedwait NEW: POSIX.1b
2063 sigwaitinfo NEW: POSIX.1b
2064 sincos NEW: GNU ext.
2065 sincosf NEW: GNU ext.
2066 sincosl NEW: GNU ext.
2070 strcasestr NEW: GNU ext.
2071 strtoimax NEW: ISO C 9x
2072 strtoumax NEW: ISO C 9x
2073 strverscmp NEW: GNU ext.
2074 svcauthdes_stats NEW: Secure RPC
2075 svcunix_create NEW: sunrpc etx
2076 svcunixfd_create NEW: sunrpc ext
2077 swapcontext NEW: Unix98
2078 tcgetsid NEW: Unix98 PTY
2079 tdestroy NEW: GNU ext.
2080 tgamma NEW: ISO C 9x
2081 tgammaf NEW: ISO C 9x
2082 tgammal NEW: ISO C 9x
2086 truncf NEW: ISO C 9x
2087 truncl NEW: ISO C 9x
2089 unlockpt NEW: Unix98 PTY
2090 updwtmpx NEW: Unix98
2091 user2netname NEW: Secure RPC
2092 utmpxname NEW: Unix98
2093 versionsort NEW: GNU ext.
2094 versionsort64 NEW: GNU ext.
2096 wcscasecmp NEW: GNU ext.
2097 wcsncasecmp NEW: GNU ext.
2098 wcsnlen NEW: GNU ext.
2099 wcstoimax NEW: ISO C 9x
2100 wcstoll NEW: ISO C 9x
2101 wcstoull NEW: ISO C 9x
2102 wcstoumax NEW: ISO C 9x
2104 wordexp NEW: POSIX.2
2105 wordfree NEW: POSIX.2
2106 write_profiling REMOVED
2107 xdecrypt NEW: Secure RPC
2108 xdr_authdes_cred NEW: Secure RPC
2109 xdr_authdes_verf NEW: Secure RPC
2110 xdr_cryptkeyarg NEW: Secure RPC
2111 xdr_cryptkeyarg2 NEW: Secure RPC
2112 xdr_cryptkeyres NEW: Secure RPC
2113 xdr_getcredres NEW: Secure RPC
2114 xdr_key_netstarg NEW: Secure RPC
2115 xdr_key_netstres NEW: Secure RPC
2116 xdr_keybuf NEW: Secure RPC
2117 xdr_keystatus NEW: Secure RPC
2118 xdr_netnamestr NEW: Secure RPC
2119 xdr_sizeof NEW: Secure RPC
2120 xdr_unixcred NEW: sunrpc ext
2121 xencrypt NEW: Secure RPC
2122 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2133 * inet_ntoa is thread-safe
2135 * updwtmp is moved from libutil to libc
2137 * rewrite of cbrt function
2139 * update of timezone data
2153 * add atoll function
2155 * fix complex problems in Berkeley DB code
2157 * fix math functions
2161 * fixed lots of header problems (especially Linux/GNU specific)
2163 * dynamic loader preserves all registers
2165 * Roland McGrath provided support for handling of auxiliary objects in
2166 the ELF dynamic loader.
2168 * support for parallel builds is improved
2172 * GNU extensions are no longer declared by default. To enable them you
2173 must define the macro `_GNU_SOURCE' in your program or compile with
2176 * The library has changed from using GNU ld symbol aliases to using weak
2177 symbols where available. The ELF object file format supports weak
2178 symbols; GNU ld also supports weak symbols in the a.out format. (There
2179 is also now support for other GNU ld extensions in ELF. Use the
2180 `--with-elf' option to configure to indicate you have ELF, and
2181 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2182 of many files which contained only symbol aliases, reducing the size of
2183 the source and the compiled library; many other files were renamed to
2184 less cryptic names previously occupied by the symbol alias files.
2185 There is a new header file <elf.h> for programs which operate on
2186 files in the ELF format.
2188 * Converted to Autoconf version 2, so `configure' has more options.
2189 Run `configure --help' to see the details.
2191 * The library can now be configured to build profiling, highly-optimized
2192 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2193 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2194 `configure' enable building these extra libraries. The shared library is
2195 built by default when using both ELF and GNU ld. When shared libraries
2196 are enabled, the new library `-ldl' is available for arbitrary run-time
2197 loading of shared objects; its interface is defined in <dlfcn.h>. The
2198 new header file <link.h> gives access to the internals of the run-time
2199 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2200 application of same name on other systems and it provides information
2201 about dynamically linked binaries.
2203 * The C library now provides the run-time support code for profiling
2204 executables compiled with `-pg'. Programs can control the profiling code
2205 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2206 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2207 the support for this file format was contributed by David Mosberger-Tang.
2209 * The math code has been replaced with a math library based on fdlibm from
2210 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2211 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2212 functions. The math functions now reside in a separate library, so
2213 programs using them will need to use `-lm' their linking commands.
2215 * John C. Bowman contributed optimized ix87 assembler inline functions.
2217 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2218 mechanism similar to that found in Solaris 2. This is now used for the
2219 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2220 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2221 file controls what services are used for each individual database. This
2222 works by loading shared libraries with names specified in `nsswitch.conf',
2223 so service modules can be changed or added at any time without even
2224 relinking any program. Currently there are the file, db, and NIS based
2225 NSS services available.
2227 * The new functions `strtoq' and `strtouq' parse integer values from
2228 strings, like `strtol' and `strtoul', but they return `long long int' and
2229 `unsigned long long int' values, respectively (64-bit quantities).
2231 * The new functions `strtof' and `strtold' parse floating-point values from
2232 strings, like `strtod', but they return `float' and `long double' values,
2233 respectively (on some machines `double' and `long double' are the same).
2235 * Ulrich Drepper has contributed new implementations of the floating-point
2236 printing and reading code used in the `printf' family of functions and
2237 `strtod', `strtof', and `strtold'. These new functions are perfectly
2238 accurate, and much faster than the old ones.
2240 * The implementation of the POSIX locale model was completely rewritten by
2241 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2242 to compile the POSIX locale definition.
2244 * The former dummy implementations of the strcoll and strxfrm function are
2245 now replaced by fully functional code contributed by Ulrich Drepper. The
2246 collation information comes from the POSIX locale definitions.
2248 * The new header <langinfo.h> defines an interface for accessing
2249 various locale-dependent data (using the locale chosen with `setlocale').
2251 * Ulrich Drepper has contributed a new suite of functions for operation on
2252 wide-character and multibyte-character strings, in <wchar.h>;
2253 and classification and case conversion of wide characters, in <wctype.h>.
2254 These new functions are conforming to the ISO C, Amendement 1 specification.
2256 * There is now a second implementation of the standard I/O library available.
2257 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2258 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2260 * You can now use positional parameter specifications in format strings
2261 for the `printf' and `scanf' families of functions. For example,
2262 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2263 ``Number 6, Mr Jones''. This is mainly useful when providing different
2264 format strings for different languages, whose grammars may dictate
2265 different orderings of the values being printed. To support this
2266 feature, the interface for `register_printf_handler' has changed; see
2267 the header file <printf.h> for details.
2269 * The `printf' and `scanf' families of functions now understand a new
2270 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2271 to group numbers as indicated by the locale; for `scanf' and friends, this
2272 says to accept as valid only a number with all the proper grouping
2273 separators in the right places. In the default "C" locale, numbers are
2274 not grouped; but locales for specific countries will define the usual
2275 conventions (i.e. separate thousands with `,' in the US locale).
2277 * The pgrp functions have been regularized, slightly incompatibly but much
2278 less confusingly. The core functions are now `getpgid' and `setpgid',
2279 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2280 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2281 provided for compatibility. There is no longer an incompatible `getpgrp'
2282 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2284 * The new header file <fts.h> and suite of functions simplify programs that
2285 operate on directory trees. This code comes from 4.4 BSD.
2287 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2288 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2289 NSS scheme used in glibc.
2291 * There is a new malloc debugging hook `__memalign_hook'.
2293 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2294 `unsigned int' in <sys/types.h>. These are for compatibility only and
2295 their use is discouraged.
2297 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2298 done differently, so that it works even without GNU ld.
2300 * New function `euidaccess' checks allowed access to a file like `access',
2301 but using the effective IDs instead of the real IDs.
2303 * The time zone data files have been updated for the latest and greatest
2304 local time conventions of the countries of the world.
2306 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2309 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2310 for formatting floating-point numbers. They are provided only for
2311 compatibility; new programs should use `sprintf' instead. There are
2312 also equivalent function for the `long double' floating-point type and
2313 all functions also exist in a reentrant form.
2315 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2316 functions for maintaining the login-record files (primarily of use to
2317 system programs such as `login'), and convenient functions for
2318 allocating and initializing a pseudo-terminal (pty) device.
2320 * Ulrich Drepper has contributed new support for System V style
2321 shared memory and IPC on systems that support it.
2323 * Ulrich Drepper has contributed several miscellaneous new functions found
2324 in System V: The `hsearch' family of functions provide an effective
2325 implementation of hash tables; `a64l' and `l64a' provide a very simple
2326 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2329 * Ulrich Drepper has contributed new reentrant counterparts for the
2330 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2332 * Ulrich Drepper has contributed new, highly-optimized versions of several
2333 string functions for the i486/Pentium family of processors.
2335 * Ulrich Drepper has updated the Linux-specific code, based largely
2336 on work done in Hongjiu Lu's version of GNU libc for Linux.
2337 The GNU library now supports Linux versions 2.0.10 and later,
2338 using the ELF object file format (i[3456]86-*-linux).
2340 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2342 * David Mosberger-Tang and Richard Henderson have ported the C library
2343 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2344 dynamic linking support for ELF/Alpha.
2346 * Richard Henderson contributed several Alpha optimized assembler function
2347 for arithmetic and string handling.
2349 * Ulrich Drepper has contributed a new set of message catalog functions to
2350 support multiple languages using the <libintl.h> interface, for use with
2351 his new package GNU gettext. Translation volunteers have contributed
2352 catalogs of the library's messages in Spanish, German, and Korean.
2354 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2355 program and the `catgets' function for reading the catalog files it
2356 creates. (The <libintl.h> interface is preferred; we include the
2357 <nl_types.h> interface using `catgets' only for source compatibility with
2358 programs already written to use it.)
2360 * New header file <values.h> gives SVID-compatible names for <limits.h>
2363 * Various new macros, declarations, and small header files for compatibility
2366 * New function `group_member' is a convenient way to check if a process has
2367 a given effective group ID.
2369 * When using GCC 2.7 and later, the socket functions are now declared in a
2370 special way so that passing an argument of type `struct sockaddr_in *',
2371 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2372 `struct sockaddr *' type, does not generate a type-clash warning.
2374 * New function `error' declared in header file <error.h> is a convenient
2375 function for printing error messages and optionally exiting; this is the
2376 canonical function used in GNU programs. The new functions `err', `warn',
2377 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2378 doing the same thing.
2380 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2381 POSIX.2 `glob' function to do ~ and {...} expansion.
2383 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2384 `clearenv' which is used in POSIX.9 is also available.
2386 * New function `getsid' returns session ID number on systems that support it.
2388 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2389 files <db.h> and <mpool.h> provide a rich set of functions for several
2390 types of simple databases stored in memory and in files, and <ndbm.h> is
2391 an old `ndbm'-compatible interface using the `db' functions. Link with
2392 `-ldb' to get these functions.
2394 * New macro `strdupa' copies a string like `strdup', but uses local stack
2395 space from `alloca' instead of dynamic heap space from `malloc'.
2397 * New function `strnlen' is like `strlen' but searches only a given maximum
2398 number of characters for the null terminator. `stpncpy', `strndup' and
2399 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2402 * New function `statfs' in header <sys/statfs.h>.
2404 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2405 provide convenient functions for operating on blocks of null-terminated
2408 * A new suite of functions in <utmp.h> handle all the details of reading
2409 and writing the utmp file.
2411 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2414 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2415 completely POSIX compliant and also implemented the extended functionality
2416 to handle alternate digit representation and alternate era date formats.
2418 * Ulrich Drepper provided an implementation of the `strptime' function
2419 defined in XPG4.2 which transforms a string into a `struct tm' value.
2421 * Paul Eggert provided the tzselect shell script as part of the timezone
2422 code. The shell script makes it easy to select the correct timezone
2425 * The implementation of the malloc family of functions is completely replaced
2426 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2427 The implementation uses the mmap function (if available) and it is
2428 optimized for the use in multi threaded programs.
2430 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2431 functions. This new functionality is usable by specifying a special
2432 salt string and it is compatible with implementation on *BSD systems.
2434 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2435 `getsubopt' to handle second level command line options, `bsd_signal'
2436 to access BSD style `signal' functionality, the obsolete `regexp' style
2439 * the `lchown' function is available on system which support this
2442 * The implementation of the shadow password handling function was contributed
2445 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2447 * POSIX.1g support was added. The <sys/select.h> header is available,
2448 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2449 implementation of `getaddrinfo'.
2453 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2455 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2456 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2458 * The new function `daemon' from 4.4 BSD is useful for server programs that
2459 want to put themselves in the background.
2461 * Joel Sherrill has contributed support for several standalone boards that
2462 run without an operating system.
2464 * `printf', `scanf' and friends now accept a `q' type modifier for long
2465 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2467 * All of the code taken from BSD (notably most of the math and networking
2468 routines) has been updated from the BSD 4.4-Lite release.
2470 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2472 * The new functions `getdomainname' and `setdomainname' fetch or change the
2473 YP/NIS domain name. These are system calls which exist on systems which
2476 * The time zone data files have been updated for the latest international
2479 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2480 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2484 * The C library now includes support for Sun RPC, from Sun's free
2485 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2486 are included. (There is still no support for YP.)
2488 * Tom Quinn has contributed a port of the C library to SGI machines running
2489 Irix 4 (mips-sgi-irix4).
2491 * The new `lockf' function is a simplified interface to the locking
2492 facilities of `fcntl', included for compatibility.
2494 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2496 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2498 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2501 * The error message printed by `assert' for a failed assertion now includes
2502 the name of the program (if using GNU ld) and the name of the calling
2503 function (with versions of GCC that support this).
2505 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2507 * The library now includes the <sys/mman.h> header file and memory
2508 management functions `mmap', `munmap', `mprotect', `msync', and
2509 `madvise', on systems that support those facilities.
2511 * The interface for `mcheck' has changed slightly: the function called to
2512 abort the program when an allocation inconsistency is detected now takes
2513 an argument that indicates the type of failure. The new function
2514 `mprobe' lets you request a consistency check for a particular block at
2515 any time (checks are normally done only when you call `free' or `realloc'
2518 * It is now possible to easily cross-compile the C library, building on one
2519 system a library to run on another machine and/or operating system. All
2520 you need to do is set the variable `HOST_CC' in `configparms' to the
2521 native compiler for programs to run on the machine you are building on (a
2522 few generator programs are used on Unix systems); set `CC' to the
2525 * The new function `fexecve' (only implemented on the GNU system) executes
2526 a program file given a file descriptor already open on the file.
2530 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2531 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2533 * You can set the variable `libprefix' in `configparms' to specify a prefix
2534 to be prepended to installed library files; this makes it easy to install
2535 the GNU C library to be linked as `-lgnuc' or whatever.
2537 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2538 copies a limited number of characters from a string, and returns the
2539 address of the last character written.
2541 * You no longer need to check for whether the installed `stddef.h' is
2542 compatible with the GNU C library. configure now checks for you.
2544 * You can now define a per-stream `fileno' function to convert the
2545 stream's cookie into an integral file descriptor.
2547 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2548 allocates zero bytes of storage, and returns a unique pointer which
2549 you can pass to `realloc' or `free'. The behavior is undefined if
2550 you dereference this pointer.
2552 * The C library now runs on Sony NEWS m68k machines running either
2553 NewsOS 3 or NewsOS 4.
2555 * The new `syscall' function is a system-dependent primitive function
2556 for invoking system calls. It has the canonical behavior on Unix
2557 systems, including unreliable return values for some calls (such as
2558 `pipe', `fork' and `getppid').
2560 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2561 to `EAGAIN', which is the preferred name. On systems whose kernels
2562 use two distinct codes, the C library now translates EWOULDBLOCK to
2563 EAGAIN in every system call function.
2567 * The GNU C Library Reference Manual is now distributed with the library.
2568 `make dvi' will produce a DVI file of the printed manual.
2569 `make info' will produce Info files that you can read on line using C-h i
2570 in Emacs or the `info' program.
2571 Please send comments on the manual to bug-glibc-manual@gnu.org.
2573 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2575 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2577 * Jason Merrill has contributed a port to the Sequent Symmetry running
2578 Dynix version 3 (i386-sequent-dynix).
2580 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2581 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2583 * New function `memory_warnings' lets you arrange to get warnings when
2584 malloc is running out of memory to allocate, like Emacs gives you.
2586 * The C library now contains the relocating allocator used in Emacs 19 for
2587 its editing buffers. This allocator (ralloc) minimizes allocation
2588 overhead and fragmentation by moving allocated regions around whenever it
2589 needs to. You always refer to a ralloc'd region with a "handle" (a
2590 pointer to a pointer--an object of type `void **').
2592 * There is a new `printf' format: `%m' gives you the string corresponding
2593 to the error code in `errno'.
2595 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2596 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2597 pass, the `a' modifier says to fill in a `char **' you pass with a
2600 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2601 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2602 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2604 * `mkstemp' is a traditional Unix function to atomically create and open a
2605 uniquely-named temporary file.
2609 * The standard location for the file that says what the local timezone is
2610 has changed again. It is now `/usr/local/etc/localtime' (or more
2611 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2613 * The distribution no longer contains any files with names longer than 14
2616 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2617 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2619 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2623 * The configuration process has changed quite a bit. The `configure'
2624 script is now used just like the configuration scripts for other GNU
2625 packages. The `sysdeps' directory hierarchy is much rearranged.
2626 The file `INSTALL' explains the new scheme in detail.
2628 * The header files no longer need to be processed into ANSI C and
2629 traditional C versions. There is just one set of files to install, and
2630 it will work with ANSI or old C compilers (including `gcc -traditional').
2632 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2633 MIPS DECStation running Ultrix 4.
2635 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2636 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2637 made itself into a shared library.
2639 * Yet further improved support for the i386, running 4.3 BSD-like systems
2640 (such as Mach 3 with the Unix single-server), or System V.
2642 * New function `strncasecmp' to do case-insensitive string comparison
2643 with limited length.
2645 * New function `strsep' is a reentrant alternative to `strtok'.
2647 * New functions `scandir' and `alphasort' for searching directories.
2649 * New function `setenv' is a better interface to `putenv'.
2651 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2652 function for traversing a directory tree.
2654 * The GNU obstack package is now also part of the C library.
2655 The new function `open_obstack_stream' creates a stdio stream that
2656 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2657 formatted output directly to an obstack.
2659 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2660 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2662 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2664 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2665 things to your strings.
2667 * There are some new test programs: test-fseek, testmb, and testrand.
2669 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2670 These ports are not finished, but are a good starting place for really
2671 supporting those systems.
2673 * `/etc/localtime' is now the standard location for the file that says what
2674 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2675 This follows the general principle that `/etc' is the place for all local
2676 configuration files.
2678 * The C library header files now use `extern "C"' when used by the C++
2679 compiler, so the C library should now work with C++ code.
2681 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2682 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2685 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2686 function which uses the `merge sort' algorithm, and is said to be
2687 significantly faster than the old GNU `qsort' function. Merge sort is
2688 now the standard `qsort' function. The new algorithm can require a lot
2689 of temporary storage; so, the old sorting function is called when the
2690 required storage is not available.
2692 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2693 provides the Unix `crypt' function, plus some other entry points.
2695 * The code and header files taken from 4.4 BSD have been updated with the
2696 latest files released from Berkeley.
2698 ----------------------------------------------------------------------
2699 Copyright information:
2701 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2703 Permission is granted to anyone to make or distribute verbatim copies
2704 of this document as received, in any medium, provided that the
2705 copyright notice and this permission notice are preserved,
2706 thus giving the recipient permission to redistribute in turn.
2708 Permission is granted to distribute modified versions
2709 of this document, or of portions of it,
2710 under the above conditions, provided also that they
2711 carry prominent notices stating who last changed them.
2714 version-control: never