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 16517, 16519, 17905, 18265, 18480, 18525, 18618, 18647, 18661, 18674,
13 18778, 18781, 18787, 18789, 18790.
17 * The following bugs are resolved with this release:
19 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
20 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
21 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
22 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
23 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
24 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
25 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
26 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
27 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
28 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
29 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
30 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
31 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
32 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
33 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
34 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
35 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
36 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
37 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
38 18657, 18676, 18694, 18696.
40 * Cache information can be queried via sysconf() function on s390 e.g. with
41 _SC_LEVEL1_ICACHE_SIZE as argument.
43 * A buffer overflow in gethostbyname_r and related functions performing DNS
44 requests has been fixed. If the NSS functions were called with a
45 misaligned buffer, the buffer length change due to pointer alignment was
46 not taken into account. This could result in application crashes or,
47 potentially arbitrary code execution, using crafted, but syntactically
48 valid DNS responses. (CVE-2015-1781)
50 * The time zone file parser has been made more robust against crafted time
51 zone files, avoiding heap buffer overflows related to the processing of
52 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
53 large time zone data files. Overly long time zone specifiers in the TZ
54 variable no longer result in stack overflows and crashes.
56 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
57 for LD and GD on x86 and x86-64, has been implemented. You will need
58 binutils-2.24 or later to enable this optimization.
60 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
61 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
62 Hat). These updates cause user visible changes, such as the fix for bug
65 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
66 and getXXbyYY NSS calls for the same database, causing a denial-of-service
67 condition in some applications.
69 * Added vector math library named libmvec with the following vectorized x86_64
70 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
72 The library can be disabled with --disable-mathvec. Use of the functions is
73 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
74 Shared library libmvec.so is linked in as needed when using -lm (no need to
75 specify -lmvec explicitly for not static builds).
76 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
78 * A new fmemopen implementation has been added with the goal of POSIX
79 compliance. The new implementation fixes the following long-standing
80 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
81 old implementation is still present for use be by existing binaries.
83 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
84 releases. It has been fixed to match 2.19 and older, but binaries built
85 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
87 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
88 Contributed by Roland McGrath (Google).
90 * The header <regexp.h> is deprecated, and will be removed in a future
91 release. Use of this header will trigger a deprecation warning.
92 Application developers should update their code to use <regex.h> instead.
94 This header was formerly part of SUS, but was deprecated in 1994 and
95 removed from the standard in 2001. Also, the glibc implementation
96 leaks memory. See BZ#18681 for more details.
100 * The following bugs are resolved with this release:
102 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
103 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
104 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
105 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
106 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
107 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
108 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
109 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
110 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
111 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
114 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
115 too little memory for the to-be-scanned arguments and overflow the
116 allocated buffer. The implementation now correctly computes the required
117 buffer size when using malloc, and switches to malloc from alloca as
120 * A new semaphore algorithm has been implemented in generic C code for all
121 machines. Previous custom assembly implementations of semaphore were
122 difficult to reason about or ensure that they were safe. The new version
123 of semaphore supports machines with 64-bit or 32-bit atomic operations.
124 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
125 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
127 * Port to Altera Nios II has been contributed by Mentor Graphics.
129 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
130 implementations for powerpc64/powerpc64le.
131 Implemented by Adhemerval Zanella (IBM).
133 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
134 and powerpc64le. This may improve lock scaling of existing programs on
135 HTM capable systems. The lock elision code is only enabled with
136 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
137 powerpc will issue a transaction abort on every syscall to avoid side
138 effects being visible outside transactions.
140 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
141 AArch64. Contributed by ARM Ltd.
143 * i386 memcpy functions optimized with SSE2 unaligned load/store.
145 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
146 under certain input conditions resulting in the execution of a shell for
147 command substitution when the application did not request it. The
148 implementation now checks WRDE_NOCMD immediately before executing the
149 shell and returns the error WRDE_CMDSUB as expected.
151 * CVE-2012-3406 printf-style functions could run into a stack overflow when
152 processing format strings with a large number of format specifiers.
154 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
155 infinite loop if the DNS response contained a PTR record of an unexpected
158 * The minimum GCC version that can be used to build this version of the GNU
159 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
160 still be used to compile programs using the GNU C Library.
162 * The GNU C Library is now built with -Werror by default. This can be
163 disabled by configuring with --disable-werror.
165 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
167 * The obsolete sigvec function has been removed. This was the original
168 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
169 programs have been using instead for about 25 years. Of course, ABI
170 compatibility for old binaries using sigvec remains intact.
172 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
173 with newer versions of bison.
175 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
176 The original MIPS o32 hard-float ABI requires an FPU where double-precision
177 registers overlay two consecutive single-precision registers. MIPS32R2
178 introduced a new FPU mode (FR=1) where double-precision registers extend the
179 corresponding single-precision registers which is incompatible with the
180 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
181 require the use of FR=1 making a transition necessary. New o32 ABI
182 extensions enable users to migrate over time from the original o32 ABI
183 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
184 tracks the ABI of any loaded object and verifies that new objects are
185 compatible. Mode transitions will also be requested as required and
186 unsupportable objects will be rejected. The ABI checks include both soft and
187 hard float ABIs for o32, n32 and n64.
189 GCC 5 with GNU binutils 2.25 onwards:
190 It is strongly recommended that all o32 system libraries are built using the
191 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
192 with the original and all new o32 ABI extensions. Configure a MIPS GCC
193 compiler using --with-fp-32=xx to set this by default.
197 * The following bugs are resolved with this release:
199 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
200 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
201 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
202 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
203 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
204 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
205 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
206 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
207 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
208 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
209 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
210 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
211 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
212 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
213 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
215 * Reverted change of ABI data structures for s390 and s390x:
216 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
217 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
218 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
219 are preserved pointing straight to the same implementation as the old ones.
220 Given that, new callers will simply provide a too-big buffer to these
221 functions. Any applications/libraries out there that embed jmp_buf or
222 ucontext_t in an ABI-relevant data structure that have already been rebuilt
223 against 2.19 headers will have to rebuilt again. This is necessary in any
224 case to revert the breakage in their ABI caused by the glibc change.
226 * Support for file description locks is added to systems running the
227 Linux kernel. The standard file locking interfaces are extended to
228 operate on file descriptions, not file descriptors, via the use of
229 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
230 are associated with an open file instead of a process.
232 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
234 * The minimum Linux kernel version that this version of the GNU C Library
235 can be used with is 2.6.32.
237 * Running the testsuite no longer terminates as soon as a test fails.
238 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
239 with PASS or FAIL lines for individual tests. A summary of the results is
240 printed, including a list of failing lists, and "make check" exits with
241 error status if there were any unexpected failures. "make check
242 stop-on-test-failure=y" may be used to keep the old behavior.
244 * The am33 port, which had not worked for several years, has been removed
247 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
248 supported; they now act the same as _DEFAULT_SOURCE (but generate a
249 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
250 conflicted with POSIX (support for which was removed in 2.19), the
251 interfaces those macros enabled remain available when compiling with
252 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
255 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
257 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
258 This may improve lock scaling of existing programs on TX capable systems.
259 The lock elision code is only built with --enable-lock-elision=yes and
260 then requires a GCC version supporting the TX builtins. With lock elision
261 default mutexes are elided via __builtin_tbegin, if the cpu supports
262 transactions. By default lock elision is not enabled and the elision code
265 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
266 copy the path argument. This allowed programs to cause posix_spawn to
267 deference a dangling pointer, or use an unexpected pathname argument if
268 the string was modified after the posix_spawn_file_actions_addopen
271 * All supported architectures now use the main glibc sysdeps directory
272 instead of some being in a separate "ports" directory (which was
273 distributed separately before glibc 2.17).
275 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
276 On configurations that support it (all Linux configurations), it's now
277 used regardless of the --enable-add-ons switch to configure. It is no
278 longer possible to build such configurations without pthreads support.
280 * Locale names, including those obtained from environment variables (LANG
281 and the LC_* variables), are more tightly checked for proper syntax.
282 setlocale will now fail (with EINVAL) for locale names that are overly
283 long, contain slashes without starting with a slash, or contain ".." path
284 components. (CVE-2014-0475) Previously, some valid locale names were
285 silently replaced with the "C" locale when running in AT_SECURE mode
286 (e.g., in a SUID program). This is no longer necessary because of the
289 * On x86-64, the dynamic linker's lazy-binding support is now compatible
290 with application code using Intel MPX instructions. (With all previous
291 versions, the MPX register state could be clobbered when making calls
292 into or out of a shared library.) Note that while the new dynamic
293 linker is compatible with all known x86 hardware whether or not it
294 supports Intel MPX, some x86 instruction-set emulators might fail to
295 handle the new instruction encodings. This is known to affect Valgrind
296 versions up through 3.9 (but will be fixed in the forthcoming 3.10
297 release), and might affect other tools that do instruction emulation.
299 * Support for loadable gconv transliteration modules has been removed.
300 The support for transliteration modules has been non-functional for
301 over a decade, and the removal is prompted by security defects. The
302 normal gconv conversion modules are still supported. Transliteration
303 with //TRANSLIT is still possible, and the //IGNORE specifier
304 continues to be supported. (CVE-2014-5119)
306 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
307 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
308 resulting a denial-of-service security vulnerability in applications which
309 use functions related to iconv. (CVE-2014-6040)
313 * The following bugs are resolved with this release:
315 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
316 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
317 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
318 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
319 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
320 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
321 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
322 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
323 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
324 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
325 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
326 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
327 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
328 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
329 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
330 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
331 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
332 16431, 16453, 16474, 16506, 16510, 16529
334 * Slovenian translations for glibc messages have been contributed by the
335 Translation Project's Slovenian team of translators.
337 * The public headers no longer use __unused nor __block. This change is to
338 support compiling programs that are derived from BSD sources and use
339 __unused internally, and to support compiling with Clang's -fblock
340 extension which uses __block.
342 * CVE-2012-4412 The strcoll implementation caches indices and rules for
343 large collation sequences to optimize multiple passes. This cache
344 computation may overflow for large collation sequences and may cause a
345 stack or buffer overflow. This is now fixed to use a slower algorithm
346 which does not use a cache if there is an integer overflow.
348 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
349 rules for large collation sequences to optimize multiple passes and falls
350 back to alloca if malloc fails, resulting in a possible stack overflow.
351 The implementation now falls back to an uncached collation sequence lookup
354 * CVE-2013-4788 The pointer guard used for pointer mangling was not
355 initialized for static applications resulting in the security feature
356 being disabled. The pointer guard is now correctly initialized to a
357 random value for static applications. Existing static applications need
358 to be recompiled to take advantage of the fix (bug 15754).
360 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
361 to the d_name member of struct dirent, or omit the terminating NUL
362 character. (Bugzilla #14699).
364 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
365 aligned_alloc functions could allocate too few bytes or corrupt the
366 heap when passed very large allocation size values (Bugzilla #15855,
369 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
370 for AF_INET6 has been fixed (Bugzilla #16072).
372 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
373 pap_CW, quz_PE, the_NP.
375 * Substantially revised locales: gd_GB, ht_HT
377 * The LC_ADDRESS field was updated to support country_car for almost all
380 * ISO 1427 definitions were updated.
382 * ISO 3166 definitions were updated.
384 * The localedef utility now supports --big-endian and --little-endian
385 command-line options to generate locales for a different system from that
386 for which the C library was built.
388 * Binary locale files now only depend on the endianness of the system for
389 which they are generated and not on other properties of that system. As a
390 consequence, binary files generated with new localedef may be incompatible
391 with old versions of the GNU C Library, and binary files generated with
392 old localedef may be incompatible with this version of the GNU C Library,
393 in the following circumstances:
395 + Locale files may be incompatible on m68k systems.
397 + Locale archive files (but not separate files for individual locales) may
398 be incompatible on systems where plain "char" is signed.
400 * The configure option --disable-versioning has been removed. Builds with
401 --disable-versioning had not worked for several years.
403 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
404 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
406 * SystemTap probes for malloc have been introduced.
408 * SystemTap probes for slow multiple precision fallback paths of
409 transcendental functions have been introduced.
411 * Support for powerpc64le has been added.
413 * The soft-float powerpc port now supports e500 processors.
415 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
417 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
418 set of header declarations that are enabled by default, even when other
419 feature test macros or compiler options such as -std=c99 would otherwise
420 disable some of those declarations.
422 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
423 conflict with POSIX. The libbsd-compat library (which was a dummy library
424 that did nothing) has also been removed.
426 * Preliminary documentation about Multi-Thread, Async-Signal and
427 Async-Cancel Safety has been added.
429 * Change of ABI data structures for s390 and s390x:
430 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
431 allow for future hardware extensions. All library functions that accept or
432 return these structures were versioned in order to provide backwards
433 compatibility with existing code. However, not all cases can be handled
434 with interface versioning. If an application embeds either structure into
435 another structure and that structure is passed to another compilation unit
436 which expects the newer larger-sized object then any access to the new
437 fields will result in undefined behaviour. Similarly any access to fields
438 that were moved by the enlarging of the structures will cause undefined
439 behaviour. To fix the undefined behaviour all objects that are part of the
440 final in-memory image must agree on the size of structures, and this may
441 require recompilation.
445 * The following bugs are resolved with this release:
447 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
448 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
449 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
450 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
451 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
452 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
453 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
454 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
455 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
456 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
457 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
458 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
459 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
462 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
463 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
464 Distributions can re-enable building and using pt_chown via the new configure
465 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
466 considerable security risks and should only be used if the distribution
467 understands and accepts the risks.
469 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
472 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
473 fixed (Bugzilla #15330).
475 * Add support for calling C++11 thread_local object destructors on thread
476 and program exit. This needs compiler support for offloading C++11
477 destructor calls to glibc.
479 * Improved worst case performance of libm functions with double inputs and
482 * Support for priority inherited mutexes in pthread condition variables on
483 non-x86 architectures.
485 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
487 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
489 * Optimized string functions for ARM. Implemented by Will Newton and
492 * Optimized libm functions for SPARC. Implemented by David S. Miller.
494 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
497 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
498 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
500 * Added a benchmark framework to track performance of functions in glibc.
502 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
503 It is based on draft TS 18661 and currently enabled as a GNU extension.
505 * On Linux, the clock function now uses the clock_gettime system call
506 for improved precision, rather than old times system call.
508 * Added support for version-3 tz format files. This is needed when using
509 the tz database release 2013e or later, and affects a few unusual cases --
510 currently only TZ='America/Godthab' for time stamps after 2037.
512 * Added new API functions pthread_getattr_default_np and
513 pthread_setattr_default_np to get and set the default pthread
514 attributes of a process.
516 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
517 This may improve lock scaling of existing programs on TSX capable systems.
518 When the --enable-lock-elision=yes parameter is specified at configure
519 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
522 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
523 availability). Implemented by Ryan S. Arnold.
525 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
529 * The following bugs are resolved with this release:
531 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
532 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
533 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
534 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
535 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
536 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
537 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
538 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
539 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
540 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
541 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
542 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
543 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
544 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
545 14879, 14889, 14893, 14898, 14914.
547 * Optimization of memcpy for MIPS.
549 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
550 EMFILE has been fixed (Bugzilla #14889).
552 * The add-on ports collection is now distributed in the "ports" subdirectory
553 of the main GNU C Library distribution, rather than separately.
555 * Port to ARM AArch64 contributed by Linaro.
557 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
558 Optimized versions of memcpy, memset, and memcmp added for System z10 and
560 Implemented by Andreas Krebbel.
562 * The new function secure_getenv allows secure access to the environment,
563 returning NULL if running in a SUID/SGID process. This function replaces
564 the internal function __secure_getenv.
566 * SystemTap static probes have been added into the dynamic linker.
567 Implemented by Gary Benson.
569 * Optimizations of string functions strstr, strcasestr and memmem.
570 Implemented by Maxim Kuvyrkov.
572 * The minimum Linux kernel version that this version of the GNU C Library
573 can be used with is 2.6.16.
575 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
576 powerpc POWER7. Implemented by Will Schmidt.
578 * New configure option --disable-nscd builds the C library such that it
579 never attempts to contact the Name Service Caching Daemon (nscd).
580 New configure option --disable-build-nscd avoids building nscd itself;
581 this is the default if --disable-nscd is used.
583 * Improved support for cross-compilation, including cross-testing and
584 bootstrap builds without a previously built glibc.
586 * Several testsuite tests are now able to test multiple IFUNC variants of an
587 interface, rather than just testing the one that would be chooen by
590 * New configure options --with-bugurl and --with-pkgversion, for
591 distributors to use to embed their bug-reporting and package version
592 information in --help and --version output.
594 * The ttyname and ttyname_r functions on Linux now fall back to searching for
595 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
596 allows creation of chroots without the procfs mounted on /proc.
598 * The `crypt' function now fails if passed salt bytes that violate the
599 specification for those values. On Linux, the `crypt' function will
600 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
601 enabled, and fail on encrypted strings using the MD5 or DES algorithm
602 when the mode is enabled.
604 * The `clock_*' suite of functions (declared in <time.h>) is now available
605 directly in the main C library. Previously it was necessary to link with
606 -lrt to use these functions. This change has the effect that a
607 single-threaded program that uses a function such as `clock_gettime' (and
608 is not linked with -lrt) will no longer implicitly load the pthreads
609 library at runtime and so will not suffer the overheads associated with
610 multi-thread support in other code such as the C++ runtime library.
612 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
617 * The following bugs are resolved with this release:
619 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
620 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
621 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
622 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
623 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
624 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
625 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
626 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
627 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
628 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
629 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
630 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
631 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
632 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
633 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
634 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
635 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
636 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
637 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
638 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
639 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
640 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
643 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
644 configuring glibc with:
645 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
646 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
647 Implemented by H.J. Lu.
651 + define static_assert
653 + do not declare gets
655 + declare at_quick_exit and quick_exit also for ISO C11
657 + aligned_alloc. NB: The code is deliberately allows the size parameter
658 to not be a multiple of the alignment. This is a moronic requirement
659 in the standard but it is only a requirement on the caller, not the
664 + uchar.h support added
666 + CMPLX, CMPLXF, CMPLXL added
668 Implemented by Ulrich Drepper.
670 * Support for the IA-64 has been moved to ports.
672 * Remove support for anything but ELF binary format
674 * Checking versions of poll, ppoll added.
675 Implemented by Ulrich Drepper.
677 * More generic and 64-bit performance optimizations to math functions.
678 Implemented by Ulrich Drepper.
680 * New configure option --enable-obsolete-rpc makes the deprecated RPC
681 headers and functions available at compile time as they were before
682 version 2.14. This option will be removed at some time in the future
683 after the TI-RPC library becomes fully sufficient for the needs of
684 existing applications.
686 * Compatibility code for Linux kernel versions before 2.4 has been removed.
687 Note that glibc is not expected to work with any Linux kernel version
690 * New header <sys/auxv.h> and function getauxval allowing easy access to
691 the AT_* key-value pairs passed from the Linux kernel. The header also
692 defines the HWCAP_* bits associated with the AT_HWCAP key.
694 * New locales: mag_IN
696 * New configure option --enable-systemtap builds SystemTap static probes
697 into libc for setjmp and longjmp and into libpthread for various operations.
698 So far the setjmp/longjmp probes and some of the libpthread probes are
699 provided only for i*86 and x86_64.
700 Implemented by Roland McGrath and Rayson Ho.
702 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
704 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
707 * More optimized functions for SPARC. Implemented by David S. Miller.
709 * Improved support for cross-compilation, especially bootstrap builds
710 without a previously built glibc.
712 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
713 Chris Metcalf from Tilera.
715 * Support for the old ARM ABI has been removed from ports. Only the EABI is
716 now supported for ARM processors.
718 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
719 as the name of the dynamic linker, to distinguish it from the
720 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
722 * Support for CRIS has been removed from ports.
724 * A new class of installed header has been documented for low-level
725 platform-specific functionality. PowerPC added the first instance with a
726 function to provide time base register access. Contributed by Tulio
727 Magno Quites Machado Filho.
729 * ix86 configurations now install header files that are consistent with
730 what x86-64 configurations install. These same header files can be used
731 for -m32, -m64, or -mx32 builds.
732 Contributed by H.J. Lu.
734 * Math library bug fixes. A thorough audit of all open math library bugs was
735 conducted by Joseph Myers. Significant progress was made on many math
736 library bugs resulting in more accurate exceptions and function results.
737 Many thanks to all those that contributed including Andreas Jaeger for his
738 patch review and work on the x87 trigonometric instruction issues.
740 * Timezone data is no longer installed. Timezone-related binaries and scripts
741 will continue to be installed. Users should obtain their timezone data from
742 their distribution provider or from the tzdata package at
743 <ftp://munnari.oz.au/pub/>.
747 * The following bugs are resolved with this release:
749 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
750 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
751 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
752 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
753 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
754 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
755 13484, 13506, 13515, 13523, 13524, 13538, 13540
757 * New program pldd to list loaded object of a process
758 Implemented by Ulrich Drepper.
760 * Add nss_db support back to glibc. No more dependency on Berkeley db
761 and support for initgroups lookups.
762 Implemented by Ulrich Drepper.
764 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
765 Contributed by HJ Lu.
767 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
768 Contributed by HJ Lu.
770 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
771 on x86-32 and x86-64.
772 Contributed by Liubov Dmitrieva.
774 * Optimized strchr and strrchr for SSE on x86-32.
775 Contributed by Liubov Dmitrieva.
777 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
778 for x86-64 and x86-32.
779 Contributed by Liubov Dmitrieva.
781 * New interfaces: scandirat, scandirat64
782 Implemented by Ulrich Drepper.
784 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
785 Implemented by Ulrich Drepper.
787 * nscd now also caches the netgroup database.
788 Implemented by Ulrich Drepper.
790 * Integrate libm with gcc's -ffinite-math-only option.
791 Implemented by Ulrich Drepper.
793 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
794 to math functions. Implemented by Ulrich Drepper.
796 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
797 Implemented by Ulrich Drepper.
799 * New Linux interfaces: process_vm_readv, process_vm_writev
801 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
802 Implemented by Ulrich Drepper.
804 * Optimized nearbyint and strcasecmp for PPC.
805 Implemented by Adhemerval Zanella.
807 * New locales: bho_IN, unm_US, es_CU, ta_LK
811 * The following bugs are resolved with this release:
813 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
814 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
815 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
816 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
817 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
818 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
819 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
820 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
821 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
822 12795, 12811, 12813, 12814, 12841
824 * The RPC implementation in libc is obsoleted. Old programs keep working
825 but new programs cannot be linked with the routines in libc anymore.
826 Programs in need of RPC functionality must be linked against TI-RPC.
827 The TI-RPC implementation is IPv6 enabled and there are other benefits.
829 Visible changes of this change include (obviously) the inability to link
830 programs using RPC functions without referencing the TI-RPC library and the
831 removal of the RPC headers from the glibc headers.
832 Implemented by Ulrich Drepper.
834 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
835 syncfs, setns, sendmmsg
837 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
838 yue_HK, lij_IT, mhr_RU
840 * New encodings: CP770, CP771, CP772, CP773, CP774
842 * New program sotruss to trace calls through PLTs
843 Implemented by Ulrich Drepper.
845 * The malloc hook implementation is marked deprecated and will be removed
846 from the default implementation in the next version. The design never
847 worked ever since the introduction of threads. Even programs which do
848 not create threads themselves can use multiple threads created internally.
852 * The following bugs are resolved with this release:
854 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
855 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
856 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
857 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
860 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
862 * POWER7 optimizations: memset, memcmp, strncmp
864 * New optimized string functions for x86-64: strnlen (SSE2),
865 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
866 Implemented by Ulrich Drepper.
870 * The following bugs are resolved with this release:
872 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
873 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
874 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
875 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
876 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
877 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
878 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
879 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
881 * New interfaces: pthread_getname_np, pthread_setname_np
883 * New Linux interface: recvmmsg
885 * STT_GNU_IFUNC implemented for Sparc by David Miller.
887 * The dynamic linker now recognizes supported ABI versions from the
888 EI_ABIVERSION field in the ELF header.
889 Implemented by Ulrich Drepper.
891 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
892 will not be used to fill in password fields in the passwd.byname replies.
893 Instead it is used to synthesize the shadow.byname table, should it be
894 missing. This is a useful mode in some installations involving Solaris.
895 Implemented by Ulrich Drepper.
897 * New locales: kok_IN, sq_MK, cv_RU
901 * The following bugs are resolved with this release:
903 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
904 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
905 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
906 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
907 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
908 10789, 10817, 10823, 10840, 10847
910 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
912 Implemented by Ulrich Drepper.
914 * Checking version of longjmp added that fails if an uninitialized stack
915 frame would be created. Implemented by Ulrich Drepper.
917 * STT_GNU_IFUNC is now supported in static executables.
918 Implemented by H.J. Lu.
920 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
922 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
923 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
924 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
925 Contributed by H.J. Lu.
927 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
928 Implemented by Ulrich Drepper.
930 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
932 Contributed by H.J. Lu.
934 * Support for fma instruction in AVX on x86-64.
935 Implemented by H.J. Lu and Ulrich Drepper.
937 * AVX support in x86-64 auditing support in ld.so.
938 Implemented by H.J. Lu.
940 * STB_GNU_UNIQUE support added.
941 Implemented by Ulrich Drepper.
943 * Implement second fallback mode for optimized DNS lookup for even more
944 broken environments. If two requests from the same port are not
945 handled correctly close the socket and open a new one before sending
946 the second request. The 'single-request-reopen' option in /etc/resolv.conf
947 can be used to select this mode right away, instead of rediscovering the
948 necessity is every process again.
949 Implemented by Ulrich Drepper.
951 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
952 Implemented by Adam Tkac.
954 * Optimized iconv conversions for S390x.
955 Implemented by Andreas Krebbel.
957 * Using condvars with PI mutexes is now more efficient due to kernel
958 support for requeueing to PI futexes. NPTL support added for x86-64.
959 Implemented by Ulrich Drepper.
961 * New locales: ps_AF, my_MM
965 * The following bugs are resolved with this release:
967 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
968 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
969 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
970 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
971 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
973 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
974 Implemented by Ulrich Drepper.
976 * New Linux interfaces: accept4, fallocate, fallocate64.
977 Implemented by Ulrich Drepper.
979 * Correct declarations of string function when used in C++ code. This
980 could lead to compile errors for invalid C++ code.
982 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
985 * New POSIX 2008 interface: psiginfo
986 Implemented by Ulrich Drepper.
988 * New ISO C++1x interfaces: quick_exit, at_quick_exit
989 Implemented by Ulrich Drepper.
991 * Support for selecting between multiple function definitions at runtime
992 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
994 * The libcrypt library can now use the hash function implementations in
995 NSS. Implemented by Ulrich Drepper.
997 * The malloc implementation can be compiled to be less memory efficient
998 but higher performing in multi-threaded programs.
999 Implemented by Ulrich Drepper.
1001 * New locales: nan_TW@latin, ks_IN
1003 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1004 Implemented by Ulrich Drepper.
1006 * Extended printf hook support. It is possible to use user-defined types
1007 and extend existing format specifiers.
1008 Implemented by Ulrich Drepper.
1010 * Handling for group shadow files has been added.
1011 Implemented by Ulrich Drepper.
1013 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1014 servers (the case, e.g., for some people using the built-in DNS
1015 server in ADSL modems/routers). There is a once-per-process timeout
1016 in case of a broken server. To avoid it, users can run nscd or put
1017 'options single-request' in /etc/resolv.conf.
1018 Implemented by Ulrich Drepper.
1022 * The following bugs are resolved with this release:
1024 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1025 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1026 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1027 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1028 6968, 6974, 6980, 6995, 7008, 7009, 7029
1030 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1031 up at the same time. Implemented by Ulrich Drepper.
1033 * TLS descriptors for LD and GD on x86 and x86-64.
1034 Implemented by Alexandre Oliva.
1036 * getaddrinfo now handles DCCP and UDPlite.
1037 Implemented by Ulrich Drepper.
1039 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1040 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1041 Implemented by Ulrich Drepper.
1043 * New implementation of memmem, strstr, and strcasestr which is O(n).
1044 Implemented by Eric Blake.
1046 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1048 * Implement "e" option for popen to open file descriptor with the
1049 close-on-exec flag set. Implemented by Ulrich Drepper.
1051 * Implement "b" mode for fmemopen. In this mode writes writes don't
1052 implicitly add a NUL byte and seeks from the end of the buffer really
1053 use the buffer end, not the string length as the basis.
1054 Implemented by Ulrich Drepper.
1056 * Many functions, exported and internal, now atomically set the close-on-exec
1057 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1059 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1061 Implemented by Pravin Satpute.
1063 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1067 * The following bugs are resolved with this release:
1069 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1070 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1071 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1072 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1073 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1074 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1075 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1077 * New locales: bo_CN, bo_IN, shs_CA.
1079 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1081 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1082 Implemented by Pravin Satpute.
1084 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1086 * nscd caches now all timeouts for DNS entries
1087 Implemented by Ulrich Drepper.
1089 * nscd is more efficient and wakes up less often.
1090 Implemented by Ulrich Drepper.
1092 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1093 vdprintf, and obstack_vprintf.
1094 Implemented by Jakub Jelinek.
1096 * Faster memset for x86-64.
1097 Implemented by Harsha Jagasia and H.J. Lu.
1099 * Faster memcpy on x86.
1100 Implemented by Ulrich Drepper.
1102 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1103 Implemented by Ulrich Drepper.
1105 * Faster sqrt and sqrtf implemention for some PPC variants.
1106 Implemented by Steven Munroe.
1110 * The following bugs are resolved with this release:
1112 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1113 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1114 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1115 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1116 5071, 5103, 5104, 5112, 5113, 5184, 5186
1118 * More checking functions: fread, fread_unlocked, open*, mq_open.
1119 Implemented by Jakub Jelinek and Ulrich Drepper.
1121 * Extend fortification to C++. Implemented by Jakub Jelinek.
1123 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1124 by not recognizing 'a' as a modifier when those specs are requested.
1125 Implemented by Jakub Jelinek.
1127 * PPC optimizations to math and string functions.
1128 Implemented by Steven Munroe.
1130 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1131 options to be passed. Implemented by Ulrich Drepper.
1133 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1135 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1136 Implemented by Ulrich Drepper.
1138 * Handle private futexes in the NPTL implementation.
1139 Implemented by Jakub Jelinek and Ulrich Drepper.
1141 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1142 Implemented by Roland McGrath and Ulrich Drepper.
1144 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1146 * SHA-256 and SHA-512 based password encryption.
1147 Implemented by Ulrich Drepper.
1149 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1150 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1153 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1154 Implemented by Ulrich Drepper.
1158 * The following bugs are resolved with this release:
1160 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1161 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1162 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1163 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1164 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1165 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1166 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1169 * New Linux interfaces: epoll_pwait, sched_getcpu.
1171 * New generic interfaces: strerror_l.
1173 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1177 * The following bugs are resolved with this release:
1179 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1180 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1181 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1182 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1183 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1184 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1185 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1186 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1187 3225, 3251, 3252, 3253, 3273
1189 * For Linux, the sorting of addresses returned by getaddrinfo now also
1190 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1191 Implemented by Ulrich Drepper.
1193 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1194 Implemented by Ulrich Drepper.
1196 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1198 * New iconv module for MIK. Contributed by Alexander Shopov.
1200 * For sites with broken group and/or passwd database, the auto-propagate
1201 option of nscd can prevent creating ID lookup entries from the results
1202 of a name lookup and vice versa. This usually is no problem but some
1203 site might have problems with the default behavior.
1204 Implemented by Ulrich Drepper.
1206 * Iterating over entire database in NIS can be slow. With the
1207 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1208 to trade time for memory. The entire database will be read at once.
1209 Implemented by Ulrich Drepper.
1211 * The interfaces introduced in RFC 3542 have been implemented by
1214 * Support for the new ELF hash table format was added by Ulrich Drepper.
1216 * Support for priority inheritance mutexes added by Jakub Jelinek and
1219 * Support for priority protected mutexes added by Jakub Jelinek.
1221 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1222 or_IN, csb_PL, fy_NL, sr_ME.
1226 * More overflow detection functions.
1228 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1229 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1231 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1232 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1233 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1234 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1235 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1236 by Masahide Washizawa.
1238 * It is now possible to install audit libraries for the dynamic linker using
1239 LD_AUDIT. Implemented by Ulrich Drepper.
1241 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1242 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1243 For a libc and libpthread that works well on Linux 2.4 kernels, we
1244 recommend using the stable 2.3 branch.
1246 * The new function open_wmemstream acts like open_memstream,
1247 but uses a wchar_t wide character buffer.
1249 * The new function ppoll is an improved version of poll, similar to pselect.
1251 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1252 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1253 renameat, unlinkat, linkat, symlinkat, readlinkat.
1255 * New Linux kernel system calls: unshare,
1256 inotify_init, inotify_add_watch, inotify_rm_watch.
1258 * The euidaccess function is now also known by the alias eaccess,
1259 for compatibility with some other systems.
1261 * Timezone data updated to 2006b version.
1265 * The following bugs are resolved with this release:
1267 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1268 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1269 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1270 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1271 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1272 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1274 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1276 * As of this release, GCC 4 can be used to compile the C Library.
1278 * Timezone data updated to 2005m version.
1282 * The following bugs are resolved with this release:
1284 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1285 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1286 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1287 777, 787, 821, 822, 823, 825
1289 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1293 * Support for RFC 3678. Real implementations exist only for Linux so far.
1294 Implemented by Ulrich Drepper.
1296 * nscd can now cache entries persistently. Expiring entries are reloaded.
1297 For speedups the cache can be shared in memory with client processes.
1298 Implemented by Ulrich Drepper.
1300 * nscd can now perform SELinux checks.
1301 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1303 * getaddrinfo queries are now cached. Canonical name lookup is performed
1305 Implemented by Ulrich Drepper.
1307 * The nothrow function attribute is used when headers are used by gcc when
1308 compiling C code. This can avoid significant amounts of exception
1311 * The malloc functions perform more error checking and are stricter when
1312 it comes to reacting on errors. The default action is to terminate
1313 the process after showing an error message. Implemented by Ulrich Drepper.
1315 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1316 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1318 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1319 namespaces using the new function dlmopen(). This feature is of course,
1320 like most other dynamic loading functionality, not available in statically
1321 linked applications. Implemented by Ulrich Drepper.
1323 * Low-overhead boundary checking variants of string and some stdio functions
1324 were added. These are to be used in conjunction with a gcc patch by
1325 Jakub Jelinek which adds calls to these functions if possible.
1326 Implemented by Jakub Jelinek and Ulrich Drepper.
1328 * Old code for several operating systems and machine architectures that
1329 have not been in working condition in a long time have been removed from
1330 the main source tree maintained by the GNU C Library's maintainers.
1331 These files are now reside in the separate `ports' source module
1332 that is usable as an add-on when building the library.
1336 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1337 interrogate the dynamic linker, compatible with the Solaris interface.
1339 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1340 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1342 * getifaddrs now uses the netlink interface on Linux to get its information.
1343 Implemented by Thorsten Kukuk.
1345 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1346 Implemented by Ulrich Drepper.
1348 * support for non-executable stacks on x86 has been added. Changes mostly
1351 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1354 * getaddrinfo now performs destination address selection according to
1359 * Thread-safe interfaces for many functions that access locale data
1360 were added in version 2.3, but these features were omitted from NEWS.
1361 Many functions have variants with an `_l' suffix that take a `locale_t'
1362 object as a parameter rather than consulting the current locale.
1363 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1364 create and maintain `locale_t' objects. Additionally, the new function
1365 `uselocale' sets "the current locale" (as used by functions not so
1366 parameterized) set for an individual thread. These features were added
1367 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1369 * The functions getresuid, getresgid, setresuid, and setresgid, which
1370 have long been available on Linux, are now declared in <unistd.h>
1371 and are now also available on the Hurd.
1373 * ELF thread-local storage support (TLS) now works on x86-64.
1375 * The new dynamic string token $LIB is expanded in shared library names.
1376 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1378 * Aldy Hernandez contributed complete software floating point support for
1379 PowerPC machines with no FPU.
1381 * fexecve is implemented on Linux.
1383 * The `btowc' function should work at least twice as fast due to
1384 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1386 * With approriate thread add-ons cancelable functions are now implemented
1387 in libc.so as well. No need to call the function in libpthread. This
1388 change allowed to finally disable the incorrect and expensive handling
1389 of weak definition in ld.so.
1391 * Yet more PLT entries in libc.so have been removed. We finally arrived
1392 at the bare minimum. Startup times improved appropriately.
1394 * Support for the new Linux/x86 system call interface was added. The
1395 AT_SYSINFO auxiliary vector entry is recognized and handled.
1399 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1402 * iconv (the program and the interface) now accepts empty names (excluding
1403 options like //TRANSLIT) to mean "use charset of current locale".
1405 * localedef can now transliterate characters in strings which are not in
1406 the provided charmap. The information from the input locale is used.
1408 * Prelinking support was added for ELF targets. This requires additional
1409 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1411 * Read-only stdio streams now use mmap to speed up operation by eliminating
1412 copying and buffer underflows. To use add 'm' to the mode string of
1413 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1415 * The malloc functions were completely rewritten by Wolfram Gloger based
1416 on Doug Lea's malloc-2.7.0.c.
1418 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1419 implementation of regex.
1421 * Bruno Haible upgraded the iconv and locale implementation to support
1424 * Contents of the LC_* and LANG environment variables in the CEN style are
1425 not recognized anymore. It never was used. Change by Ulrich Drepper.
1427 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1428 thread-local storage (TLS) ABI on some platforms.
1429 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1431 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1432 EUC-JISX0213, and TSCII.
1434 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1435 BSD-compatible interface for getting all network interface addresses.
1436 Implementation for IPv4 by Roland McGrath.
1438 * Loading of locale data is faster due to the introduction of a locale
1439 archive. Implemented by Roland McGrath and Ulrich Drepper.
1441 * Startup times are significantly reduced by not using exported functions
1442 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1445 * Steven Munroe contributed a port to PowerPC64/Linux.
1449 * The Hurd now uses the GNU libio implementation of stdio rather than the
1450 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1452 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1453 with the same behavior as the Linux system call of the same name.
1457 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1458 128-bit long double format.
1460 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1461 IBM1161, and IBM1162 charsets.
1463 * Andreas Jaeger contributed a port to x86-64/Linux.
1465 * Peter Bruin contributed a port to PowerPC/Hurd.
1467 * libc functions using I/O streams now can handle wide-oriented streams
1470 * optimizations in the dynamic linker. Binaries created by recent binutils
1471 versions start up quicker due to reduced time spent on relocations.
1473 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1477 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1478 asinh, atanh, j0 for the 128-bit long double format.
1480 * Bruno Haible updated all the code handling Unicode in some form to
1481 support Unicode 3.1.
1483 * Speed of regex for single-byte locales is back to previous levels.
1484 Patch by Isamu Hasegawa.
1486 * Alpha, SPARC, and IA-64 now also using floating stacks.
1488 * Startup time of internationalized applications greatly improved through
1489 iconv cache. Use iconvconfig to generate the cache file.
1490 Contributed by Ulrich Drepper.
1492 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1493 severe performance problems. Patch by David Mosberger.
1495 * The Hurd port got a lot more functionality like AIO, various stdio
1496 extensions, etc. Mainly done by Roland McGrath.
1498 * mtrace can now lookup symbols in shared libraries.
1502 * Intel's IA-64 math library is largely integrated. It provides fast and
1503 accurate implementatations for most basic and standard math functions
1504 in float, double, and long double format.
1506 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1507 and asin for the 96-bit long double format and asin, log, tan for the
1508 128-bit long double format.
1510 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1511 The basic double functions exist today. Contributed by Abraham Ziv
1512 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1513 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1515 * An asynchronous name lookup library was added. The interface is designed
1516 after POSIX AIO. The proposal was circulated beforehand to get comments.
1517 No negative ones came in. Implemented by Ulrich Drepper.
1519 * Port to S390/64bit contributed by Martin Schwidefsky
1520 <schwidefsky@de.ibm.com>.
1522 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1523 of functions for Linux/IA-64.
1525 * The RPC code is now thread safe. Threads can now use the same service
1526 of different services at the same time. Patch by Eric Norum
1527 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1529 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1530 family of functions for Linux/S390.
1532 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1533 of functions for Linux/x86.
1535 * Port to Linux/CRIS contributed by Axis Communications.
1539 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1540 we can now check for namespace violations and missing declarations. The
1541 result is that almost all headers are now Unix-compliant (as defined in
1542 the upcoming XPG6). The negative side is that some programs might need
1543 corrections, too, if they depend on the incorrect form of the headers in
1544 previous versions which defined too many symbols and included too many
1547 * regex now handles multibyte character sets correctly.
1548 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1550 * iconv (the program) does now conform to the upcoming XPG6 and handles
1551 charmaps. Instead of the charset names the path of charmaps can be
1552 provided and the conversion happens based on this data.
1553 Contributed by Ulrich Drepper.
1555 * The locale program now provides detailed information about the installed
1560 only lists the names of the supported locales
1564 provides details such as country, language, and codeset name.
1565 Contributed by Ulrich Drepper.
1569 * The gencat program now parses the input file according to the charset
1570 selected by the LC_CTYPE category. This is important for stateful
1571 character sets. To make generating catalogs easier there is a way
1572 to overwrite the charset selected by the locale: before the first
1573 message or $ quote line the catalog can contain a line like
1575 $ codeset=ISO-8859-2
1577 to select the charset (ISO-8859-2 in this case).
1579 Implemented by Shinya Hanataka and Ulrich Drepper.
1581 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1582 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1583 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1585 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1586 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1588 * The LANGUAGE environment variable is now ignored unless the locale is
1589 changed from the default "C" locale.
1591 * The usual bug fixes.
1595 * Greg McGary added runtime support for bounds checking using gcc's
1596 new -fbounded-pointers option. ix86 target is complete. PowerPC
1599 * Thorsten Kukuk added secure mode support to nscd.
1601 * The Berkeley db libraries have been removed.
1603 Related, the nss_db module is now in a separate package since it
1604 obviously requires a database library being available.
1606 * Wide character I/O streams implemented by Ulrich Drepper.
1608 * Functions from the extended socket API added by Ulrich Drepper.
1610 * Functions feenableexcept and fedisableexcept to control the
1611 behaviour of individual exceptions have been added by Andreas Jaeger.
1613 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1615 * The resolver code has been updated from bind 8.2.3-T5B which supports
1616 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1619 This change could in some situations effect backward compatibility. Since
1620 now `_res' is a thread-local instead of a global variable, modifying it
1621 in one thread does not have any effect in other threads.
1623 The resolver library was also extended to allow IPv6 as the transport
1624 protocol for the requests. This work was done by Stig Venaas.
1626 * Compatibility code for K&R C compilers has been removed from the
1627 header files. A ISO C compiler is needed to use the library
1628 (conforming to either C89 or C99 standard).
1630 * Complete rewrite of the localedef program to support multibyte character
1631 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1632 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1633 Implemented by Ulrich Drepper.
1635 Bruno Haible significantly improved the generation and use of the data
1636 structures for the wide character tables.
1638 * Plural handling in gettext implemented by Ulrich Drepper.
1640 * The utmp daemon has been removed.
1642 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1644 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1647 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1649 * POSIX barriers implemented by Kaz Kylheku.
1651 * POSIX spawn function family implemented by Ulrich Drepper.
1653 * POSIX spinlocks are now available.
1655 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1657 * the configure option --enable-kernel=X.Y.Z allows to strip out
1658 compatibility for kernel versions before X.Y.Z. This is currently only
1659 implemented for Linux.
1661 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1662 field sin6_scope_id. This means that all programs using IPv6 should be
1663 recompiled. Don't expect binary compatibility with previous glibc
1666 * various conversion modules for IBM character sets contributed by
1669 * IA-64 port by Jes Sorensen and HJ Lu.
1683 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1685 * New xdr functions are added; some rpc functions are now 64bit clean.
1687 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1689 * Fixed known incompatibilities with glibc 2.0.
1691 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1693 * Optimized a number of functions (especially the ELF dynamic loader).
1695 * Update timezone data files.
1697 * lots of charmaps corrections
1699 * some new locale definitions and charmaps
1704 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1705 conform to POSIX member type requirements. Symbol versions have been
1706 adjusted as needed within the library, and for direct use by applications,
1707 but there is potential for problems if third-party libraries use
1708 struct timeval as part of their interface. This does not present
1709 a problem for X and other "essential" system libraries.
1711 * An additional locale model to support C++ Standard Library locale
1712 model and probably more was implemented by Ulrich Drepper.
1714 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1717 * Miles Bader provided the `argp' function family to support hierachical
1718 command line argument parsing, layered on top of getopt.
1720 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1722 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1725 * scanf recognizes the %a and %A format for scanning floating point numbers.
1727 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1728 information and interfaces for the available integer types.
1730 * about 130 new math functions were added to implement the ISO C9x math
1733 * the new header <complex.h> contains definitions of the complex math
1734 functions from ISO C 9X.
1736 * the new header <tgmath.h> defines generic macros to use complex or
1737 real valued functions.
1739 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1741 * Andreas Jaeger provided a test suite for the math library.
1743 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1745 * Ulrich Drepper added character set conversion functions (iconv).
1747 * Optimized string functions have been added.
1749 * The localedata addon is now part of glibc.
1751 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1753 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1754 daemon for NSS (nscd).
1756 Missing a better place here are some numbers on improvements. Under
1757 Linux 2.1.125 un-tar-ing the kernel sources takes
1761 using local files 12.19s 6.88s 22.91s
1763 using NIS 13.92s 8.91s 26.34s
1765 using NIS & nscd 10.37s 7.34s 25.30s
1767 using NIS+ 27.57s 30.37s 640.46s
1769 using NIS+ & nscd 10.25s 7.83s 26.51s
1771 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1773 Keep in mind that non-namelookup related operations dominate above times.
1774 It was just a common complain that using NIS+ unpacking the kernel is
1777 [1] The old nscd implementation is not available anymore since it was
1778 distributed with glibc up to version 2.0.98 and thus is now replaced.
1780 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1782 * Mark Kettenis provided a Hesiod NSS module.
1784 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1785 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1787 * rcmd can now handle netgroups (Dick Streefland).
1789 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1792 * Support for the IPv6 protocol has been added to the socket API, as per the
1793 latest draft standards.
1795 * Support for Linux 2.2 has been added.
1797 * Interface changes relative to the latest 2.0.x release:
1798 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1799 addseverity NEW: Unix98
1800 alphasort64 NEW: LFS
1801 argp_err_exit_status NEW: argp, GNU ext
1802 argp_error NEW: argp, GNU ext
1803 argp_failure NEW: argp, GNU ext
1804 argp_help NEW: argp, GNU ext
1805 argp_parse NEW: argp, GNU ext
1806 argp_program_bug_address NEW: argp, GNU ext
1807 argp_program_version NEW: argp, GNU ext
1808 argp_program_version_hook NEW: argp, GNU ext
1809 argp_state_help NEW: argp, GNU ext
1810 argp_usage NEW: argp, GNU ext
1811 authdes_create NEW: Secure RPC
1812 authdes_getucred NEW: Secure RPC
1813 authdes_pk_create NEW: Secure RPC
1814 backtrace NEW: GNU ext.
1815 backtrace_symbols NEW: GNU ext.
1816 backtrace_symbols_fd NEW: GNU ext.
1818 cacosf NEW: ISO C 9x
1819 cacosh NEW: ISO C 9x
1820 cacoshf NEW: ISO C 9x
1821 cacoshl NEW: ISO C 9x
1822 cacosl NEW: ISO C 9x
1829 casinf NEW: ISO C 9x
1830 casinh NEW: ISO C 9x
1831 casinhf NEW: ISO C 9x
1832 casinhl NEW: ISO C 9x
1833 casinl NEW: ISO C 9x
1835 catanf NEW: ISO C 9x
1836 catanh NEW: ISO C 9x
1837 catanhf NEW: ISO C 9x
1838 catanhl NEW: ISO C 9x
1839 catanl NEW: ISO C 9x
1840 cbc_crypt NEW: Secure RPC
1844 ccoshf NEW: ISO C 9x
1845 ccoshl NEW: ISO C 9x
1851 cimagf NEW: ISO C 9x
1852 cimagl NEW: ISO C 9x
1853 clearerr_locked REMOVED
1854 clntunix_create NEW: sunrpc ext
1856 clog10 NEW: ISO C 9x
1857 clog10f NEW: ISO C 9x
1858 clog10l NEW: ISO C 9x
1868 cprojf NEW: ISO C 9x
1869 cprojl NEW: ISO C 9x
1871 crealf NEW: ISO C 9x
1872 creall NEW: ISO C 9x
1877 csinhf NEW: ISO C 9x
1878 csinhl NEW: ISO C 9x
1881 csqrtf NEW: ISO C 9x
1882 csqrtl NEW: ISO C 9x
1886 ctanhf NEW: ISO C 9x
1887 ctanhl NEW: ISO C 9x
1889 des_setparity NEW: Secure RPC
1890 ecb_crypt NEW: Secure RPC
1891 endutxent NEW: Unix98
1893 exp10f NEW: ISO C 9x
1894 exp10l NEW: ISO C 9x
1898 fattach NEW: STREAMS
1899 fdetach NEW: STREAMS
1903 feclearexcept NEW: ISO C 9x
1904 fegetenv NEW: ISO C 9x
1905 fegetexceptflag NEW: ISO C 9x
1906 fegetround NEW: ISO C 9x
1907 feholdexcept NEW: ISO C 9x
1909 feraiseexcept NEW: ISO C 9x
1910 ferror_locked REMOVED
1911 fesetenv NEW: ISO C 9x
1912 fesetexceptflag NEW: ISO C 9x
1913 fesetround NEW: ISO C 9x
1914 fetestexcept NEW: ISO C 9x
1915 feupdateenv NEW: ISO C 9x
1916 fflush_locked REMOVED
1920 fgets_unlocked NEW: GNU ext.
1921 fileno_locked REMOVED
1933 fputc_locked REMOVED
1934 fputs_unlocked NEW: GNU ext.
1935 fread_unlocked NEW: GNU ext.
1940 fstatvfs NEW: Unix98
1944 ftruncate64 NEW: LFS
1946 fwrite_unlocked NEW: GNU ext.
1947 gai_strerror NEW: IPv6
1951 getchar_locked REMOVED
1953 getdate_err NEW: Unix98
1954 getdate_r NEW: GNU ext.
1956 getnameinfo NEW: IPv6
1957 getnetname NEW: Secure RPC
1958 getpmsg NEW: STREAMS
1959 getpt NEW: Unix98 PTY
1960 getrlimit64 NEW: LFS
1961 getutxent NEW: Unix98
1962 getutxid NEW: Unix98
1963 getutxline NEW: Unix98
1964 glob64 NEW: GNU ext.
1965 globfree64 NEW: GNU ext.
1966 gnu_get_libc_release NEW: GNU ext.
1967 gnu_get_libc_version NEW: GNU ext.
1968 grantpt NEW: Unix98 PTY
1969 host2netname NEW: Secure RPC
1971 iconv_close NEW: iconv
1972 iconv_open NEW: iconv
1973 if_freenameindex NEW: IPv6
1974 if_indextoname NEW: IPv6
1975 if_nameindex NEW: IPv6
1976 if_nametoindex NEW: IPv6
1977 in6addr_any NEW: IPv6
1978 in6addr_loopback NEW: IPv6
1979 inet6_isipv4mapped NEW: IPv6
1980 isastream NEW: STREAMS
1981 iswblank NEW: GNU ext.
1982 key_decryptsession NEW: Secure RPC
1983 key_decryptsession_pk NEW: Secure RPC
1984 key_encryptsession NEW: Secure RPC
1985 key_encryptsession_pk NEW: Secure RPC
1986 key_gendes NEW: Secure RPC
1987 key_get_conv NEW: Secure RPC
1988 key_secretkey_is_set NEW: Secure RPC
1989 key_setnet NEW: Secure RPC
1990 key_setsecret NEW: Secure RPC
1991 llrint NEW: ISO C 9x
1992 llrintf NEW: ISO C 9x
1993 llrintl NEW: ISO C 9x
1994 llround NEW: ISO C 9x
1995 llroundf NEW: ISO C 9x
1996 llroundl NEW: ISO C 9x
2001 lrintf NEW: ISO C 9x
2002 lrintl NEW: ISO C 9x
2003 lround NEW: ISO C 9x
2004 lroundf NEW: ISO C 9x
2005 lroundl NEW: ISO C 9x
2007 makecontext NEW: Unix98
2008 mempcpy NEW: GNU ext.
2011 modify_ldt NEW: kernel
2015 nearbyint NEW: ISO C 9x
2016 nearbyintf NEW: ISO C 9x
2017 nearbyintl NEW: ISO C 9x
2018 netname2host NEW: Secure RPC
2019 netname2user NEW: Secure RPC
2020 nexttoward NEW: ISO C 9x
2021 nexttowardf NEW: ISO C 9x
2022 nexttowardl NEW: ISO C 9x
2026 passwd2des NEW: Secure RPC
2028 pow10f NEW: GNU ext.
2029 pow10l NEW: GNU ext.
2032 printf_size NEW: GNU ext.
2033 printf_size_info NEW: GNU ext.
2034 profil_counter REMOVED
2035 pthread_mutexattr_getkind_np REPLACED
2036 pthread_mutexattr_setkind_np REPLACED
2037 ptsname NEW: Unix98 PTY
2038 ptsname_r NEW: Unix98 PTY
2040 putchar_locked REMOVED
2041 putgrent NEW: GNU ext.
2043 putpmsg NEW: STREAMS
2044 pututxline NEW: Unix98
2048 readdir64_r NEW: LFS
2049 remquo NEW: ISO C 9x
2050 remquof NEW: ISO C 9x
2051 remquol NEW: ISO C 9x
2053 roundf NEW: ISO C 9x
2054 roundl NEW: ISO C 9x
2056 scalbln NEW: ISO C 9x
2057 scalblnf NEW: ISO C 9x
2058 scalblnl NEW: ISO C 9x
2060 sendfile NEW: kernel
2061 setcontext NEW: Unix98
2062 setrlimit64 NEW: LFS
2063 setutxent NEW: Unix98
2065 sigignore NEW: Unix98
2066 sigqueue NEW: POSIX.1b
2067 sigrelse NEW: Unix98
2068 sigset NEW: POSIX.1b
2069 sigtimedwait NEW: POSIX.1b
2070 sigwaitinfo NEW: POSIX.1b
2071 sincos NEW: GNU ext.
2072 sincosf NEW: GNU ext.
2073 sincosl NEW: GNU ext.
2077 strcasestr NEW: GNU ext.
2078 strtoimax NEW: ISO C 9x
2079 strtoumax NEW: ISO C 9x
2080 strverscmp NEW: GNU ext.
2081 svcauthdes_stats NEW: Secure RPC
2082 svcunix_create NEW: sunrpc etx
2083 svcunixfd_create NEW: sunrpc ext
2084 swapcontext NEW: Unix98
2085 tcgetsid NEW: Unix98 PTY
2086 tdestroy NEW: GNU ext.
2087 tgamma NEW: ISO C 9x
2088 tgammaf NEW: ISO C 9x
2089 tgammal NEW: ISO C 9x
2093 truncf NEW: ISO C 9x
2094 truncl NEW: ISO C 9x
2096 unlockpt NEW: Unix98 PTY
2097 updwtmpx NEW: Unix98
2098 user2netname NEW: Secure RPC
2099 utmpxname NEW: Unix98
2100 versionsort NEW: GNU ext.
2101 versionsort64 NEW: GNU ext.
2103 wcscasecmp NEW: GNU ext.
2104 wcsncasecmp NEW: GNU ext.
2105 wcsnlen NEW: GNU ext.
2106 wcstoimax NEW: ISO C 9x
2107 wcstoll NEW: ISO C 9x
2108 wcstoull NEW: ISO C 9x
2109 wcstoumax NEW: ISO C 9x
2111 wordexp NEW: POSIX.2
2112 wordfree NEW: POSIX.2
2113 write_profiling REMOVED
2114 xdecrypt NEW: Secure RPC
2115 xdr_authdes_cred NEW: Secure RPC
2116 xdr_authdes_verf NEW: Secure RPC
2117 xdr_cryptkeyarg NEW: Secure RPC
2118 xdr_cryptkeyarg2 NEW: Secure RPC
2119 xdr_cryptkeyres NEW: Secure RPC
2120 xdr_getcredres NEW: Secure RPC
2121 xdr_key_netstarg NEW: Secure RPC
2122 xdr_key_netstres NEW: Secure RPC
2123 xdr_keybuf NEW: Secure RPC
2124 xdr_keystatus NEW: Secure RPC
2125 xdr_netnamestr NEW: Secure RPC
2126 xdr_sizeof NEW: Secure RPC
2127 xdr_unixcred NEW: sunrpc ext
2128 xencrypt NEW: Secure RPC
2129 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2140 * inet_ntoa is thread-safe
2142 * updwtmp is moved from libutil to libc
2144 * rewrite of cbrt function
2146 * update of timezone data
2160 * add atoll function
2162 * fix complex problems in Berkeley DB code
2164 * fix math functions
2168 * fixed lots of header problems (especially Linux/GNU specific)
2170 * dynamic loader preserves all registers
2172 * Roland McGrath provided support for handling of auxiliary objects in
2173 the ELF dynamic loader.
2175 * support for parallel builds is improved
2179 * GNU extensions are no longer declared by default. To enable them you
2180 must define the macro `_GNU_SOURCE' in your program or compile with
2183 * The library has changed from using GNU ld symbol aliases to using weak
2184 symbols where available. The ELF object file format supports weak
2185 symbols; GNU ld also supports weak symbols in the a.out format. (There
2186 is also now support for other GNU ld extensions in ELF. Use the
2187 `--with-elf' option to configure to indicate you have ELF, and
2188 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2189 of many files which contained only symbol aliases, reducing the size of
2190 the source and the compiled library; many other files were renamed to
2191 less cryptic names previously occupied by the symbol alias files.
2192 There is a new header file <elf.h> for programs which operate on
2193 files in the ELF format.
2195 * Converted to Autoconf version 2, so `configure' has more options.
2196 Run `configure --help' to see the details.
2198 * The library can now be configured to build profiling, highly-optimized
2199 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2200 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2201 `configure' enable building these extra libraries. The shared library is
2202 built by default when using both ELF and GNU ld. When shared libraries
2203 are enabled, the new library `-ldl' is available for arbitrary run-time
2204 loading of shared objects; its interface is defined in <dlfcn.h>. The
2205 new header file <link.h> gives access to the internals of the run-time
2206 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2207 application of same name on other systems and it provides information
2208 about dynamically linked binaries.
2210 * The C library now provides the run-time support code for profiling
2211 executables compiled with `-pg'. Programs can control the profiling code
2212 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2213 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2214 the support for this file format was contributed by David Mosberger-Tang.
2216 * The math code has been replaced with a math library based on fdlibm from
2217 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2218 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2219 functions. The math functions now reside in a separate library, so
2220 programs using them will need to use `-lm' their linking commands.
2222 * John C. Bowman contributed optimized ix87 assembler inline functions.
2224 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2225 mechanism similar to that found in Solaris 2. This is now used for the
2226 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2227 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2228 file controls what services are used for each individual database. This
2229 works by loading shared libraries with names specified in `nsswitch.conf',
2230 so service modules can be changed or added at any time without even
2231 relinking any program. Currently there are the file, db, and NIS based
2232 NSS services available.
2234 * The new functions `strtoq' and `strtouq' parse integer values from
2235 strings, like `strtol' and `strtoul', but they return `long long int' and
2236 `unsigned long long int' values, respectively (64-bit quantities).
2238 * The new functions `strtof' and `strtold' parse floating-point values from
2239 strings, like `strtod', but they return `float' and `long double' values,
2240 respectively (on some machines `double' and `long double' are the same).
2242 * Ulrich Drepper has contributed new implementations of the floating-point
2243 printing and reading code used in the `printf' family of functions and
2244 `strtod', `strtof', and `strtold'. These new functions are perfectly
2245 accurate, and much faster than the old ones.
2247 * The implementation of the POSIX locale model was completely rewritten by
2248 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2249 to compile the POSIX locale definition.
2251 * The former dummy implementations of the strcoll and strxfrm function are
2252 now replaced by fully functional code contributed by Ulrich Drepper. The
2253 collation information comes from the POSIX locale definitions.
2255 * The new header <langinfo.h> defines an interface for accessing
2256 various locale-dependent data (using the locale chosen with `setlocale').
2258 * Ulrich Drepper has contributed a new suite of functions for operation on
2259 wide-character and multibyte-character strings, in <wchar.h>;
2260 and classification and case conversion of wide characters, in <wctype.h>.
2261 These new functions are conforming to the ISO C, Amendement 1 specification.
2263 * There is now a second implementation of the standard I/O library available.
2264 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2265 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2267 * You can now use positional parameter specifications in format strings
2268 for the `printf' and `scanf' families of functions. For example,
2269 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2270 ``Number 6, Mr Jones''. This is mainly useful when providing different
2271 format strings for different languages, whose grammars may dictate
2272 different orderings of the values being printed. To support this
2273 feature, the interface for `register_printf_handler' has changed; see
2274 the header file <printf.h> for details.
2276 * The `printf' and `scanf' families of functions now understand a new
2277 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2278 to group numbers as indicated by the locale; for `scanf' and friends, this
2279 says to accept as valid only a number with all the proper grouping
2280 separators in the right places. In the default "C" locale, numbers are
2281 not grouped; but locales for specific countries will define the usual
2282 conventions (i.e. separate thousands with `,' in the US locale).
2284 * The pgrp functions have been regularized, slightly incompatibly but much
2285 less confusingly. The core functions are now `getpgid' and `setpgid',
2286 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2287 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2288 provided for compatibility. There is no longer an incompatible `getpgrp'
2289 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2291 * The new header file <fts.h> and suite of functions simplify programs that
2292 operate on directory trees. This code comes from 4.4 BSD.
2294 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2295 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2296 NSS scheme used in glibc.
2298 * There is a new malloc debugging hook `__memalign_hook'.
2300 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2301 `unsigned int' in <sys/types.h>. These are for compatibility only and
2302 their use is discouraged.
2304 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2305 done differently, so that it works even without GNU ld.
2307 * New function `euidaccess' checks allowed access to a file like `access',
2308 but using the effective IDs instead of the real IDs.
2310 * The time zone data files have been updated for the latest and greatest
2311 local time conventions of the countries of the world.
2313 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2316 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2317 for formatting floating-point numbers. They are provided only for
2318 compatibility; new programs should use `sprintf' instead. There are
2319 also equivalent function for the `long double' floating-point type and
2320 all functions also exist in a reentrant form.
2322 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2323 functions for maintaining the login-record files (primarily of use to
2324 system programs such as `login'), and convenient functions for
2325 allocating and initializing a pseudo-terminal (pty) device.
2327 * Ulrich Drepper has contributed new support for System V style
2328 shared memory and IPC on systems that support it.
2330 * Ulrich Drepper has contributed several miscellaneous new functions found
2331 in System V: The `hsearch' family of functions provide an effective
2332 implementation of hash tables; `a64l' and `l64a' provide a very simple
2333 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2336 * Ulrich Drepper has contributed new reentrant counterparts for the
2337 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2339 * Ulrich Drepper has contributed new, highly-optimized versions of several
2340 string functions for the i486/Pentium family of processors.
2342 * Ulrich Drepper has updated the Linux-specific code, based largely
2343 on work done in Hongjiu Lu's version of GNU libc for Linux.
2344 The GNU library now supports Linux versions 2.0.10 and later,
2345 using the ELF object file format (i[3456]86-*-linux).
2347 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2349 * David Mosberger-Tang and Richard Henderson have ported the C library
2350 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2351 dynamic linking support for ELF/Alpha.
2353 * Richard Henderson contributed several Alpha optimized assembler function
2354 for arithmetic and string handling.
2356 * Ulrich Drepper has contributed a new set of message catalog functions to
2357 support multiple languages using the <libintl.h> interface, for use with
2358 his new package GNU gettext. Translation volunteers have contributed
2359 catalogs of the library's messages in Spanish, German, and Korean.
2361 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2362 program and the `catgets' function for reading the catalog files it
2363 creates. (The <libintl.h> interface is preferred; we include the
2364 <nl_types.h> interface using `catgets' only for source compatibility with
2365 programs already written to use it.)
2367 * New header file <values.h> gives SVID-compatible names for <limits.h>
2370 * Various new macros, declarations, and small header files for compatibility
2373 * New function `group_member' is a convenient way to check if a process has
2374 a given effective group ID.
2376 * When using GCC 2.7 and later, the socket functions are now declared in a
2377 special way so that passing an argument of type `struct sockaddr_in *',
2378 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2379 `struct sockaddr *' type, does not generate a type-clash warning.
2381 * New function `error' declared in header file <error.h> is a convenient
2382 function for printing error messages and optionally exiting; this is the
2383 canonical function used in GNU programs. The new functions `err', `warn',
2384 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2385 doing the same thing.
2387 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2388 POSIX.2 `glob' function to do ~ and {...} expansion.
2390 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2391 `clearenv' which is used in POSIX.9 is also available.
2393 * New function `getsid' returns session ID number on systems that support it.
2395 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2396 files <db.h> and <mpool.h> provide a rich set of functions for several
2397 types of simple databases stored in memory and in files, and <ndbm.h> is
2398 an old `ndbm'-compatible interface using the `db' functions. Link with
2399 `-ldb' to get these functions.
2401 * New macro `strdupa' copies a string like `strdup', but uses local stack
2402 space from `alloca' instead of dynamic heap space from `malloc'.
2404 * New function `strnlen' is like `strlen' but searches only a given maximum
2405 number of characters for the null terminator. `stpncpy', `strndup' and
2406 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2409 * New function `statfs' in header <sys/statfs.h>.
2411 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2412 provide convenient functions for operating on blocks of null-terminated
2415 * A new suite of functions in <utmp.h> handle all the details of reading
2416 and writing the utmp file.
2418 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2421 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2422 completely POSIX compliant and also implemented the extended functionality
2423 to handle alternate digit representation and alternate era date formats.
2425 * Ulrich Drepper provided an implementation of the `strptime' function
2426 defined in XPG4.2 which transforms a string into a `struct tm' value.
2428 * Paul Eggert provided the tzselect shell script as part of the timezone
2429 code. The shell script makes it easy to select the correct timezone
2432 * The implementation of the malloc family of functions is completely replaced
2433 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2434 The implementation uses the mmap function (if available) and it is
2435 optimized for the use in multi threaded programs.
2437 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2438 functions. This new functionality is usable by specifying a special
2439 salt string and it is compatible with implementation on *BSD systems.
2441 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2442 `getsubopt' to handle second level command line options, `bsd_signal'
2443 to access BSD style `signal' functionality, the obsolete `regexp' style
2446 * the `lchown' function is available on system which support this
2449 * The implementation of the shadow password handling function was contributed
2452 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2454 * POSIX.1g support was added. The <sys/select.h> header is available,
2455 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2456 implementation of `getaddrinfo'.
2460 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2462 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2463 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2465 * The new function `daemon' from 4.4 BSD is useful for server programs that
2466 want to put themselves in the background.
2468 * Joel Sherrill has contributed support for several standalone boards that
2469 run without an operating system.
2471 * `printf', `scanf' and friends now accept a `q' type modifier for long
2472 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2474 * All of the code taken from BSD (notably most of the math and networking
2475 routines) has been updated from the BSD 4.4-Lite release.
2477 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2479 * The new functions `getdomainname' and `setdomainname' fetch or change the
2480 YP/NIS domain name. These are system calls which exist on systems which
2483 * The time zone data files have been updated for the latest international
2486 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2487 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2491 * The C library now includes support for Sun RPC, from Sun's free
2492 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2493 are included. (There is still no support for YP.)
2495 * Tom Quinn has contributed a port of the C library to SGI machines running
2496 Irix 4 (mips-sgi-irix4).
2498 * The new `lockf' function is a simplified interface to the locking
2499 facilities of `fcntl', included for compatibility.
2501 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2503 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2505 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2508 * The error message printed by `assert' for a failed assertion now includes
2509 the name of the program (if using GNU ld) and the name of the calling
2510 function (with versions of GCC that support this).
2512 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2514 * The library now includes the <sys/mman.h> header file and memory
2515 management functions `mmap', `munmap', `mprotect', `msync', and
2516 `madvise', on systems that support those facilities.
2518 * The interface for `mcheck' has changed slightly: the function called to
2519 abort the program when an allocation inconsistency is detected now takes
2520 an argument that indicates the type of failure. The new function
2521 `mprobe' lets you request a consistency check for a particular block at
2522 any time (checks are normally done only when you call `free' or `realloc'
2525 * It is now possible to easily cross-compile the C library, building on one
2526 system a library to run on another machine and/or operating system. All
2527 you need to do is set the variable `HOST_CC' in `configparms' to the
2528 native compiler for programs to run on the machine you are building on (a
2529 few generator programs are used on Unix systems); set `CC' to the
2532 * The new function `fexecve' (only implemented on the GNU system) executes
2533 a program file given a file descriptor already open on the file.
2537 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2538 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2540 * You can set the variable `libprefix' in `configparms' to specify a prefix
2541 to be prepended to installed library files; this makes it easy to install
2542 the GNU C library to be linked as `-lgnuc' or whatever.
2544 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2545 copies a limited number of characters from a string, and returns the
2546 address of the last character written.
2548 * You no longer need to check for whether the installed `stddef.h' is
2549 compatible with the GNU C library. configure now checks for you.
2551 * You can now define a per-stream `fileno' function to convert the
2552 stream's cookie into an integral file descriptor.
2554 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2555 allocates zero bytes of storage, and returns a unique pointer which
2556 you can pass to `realloc' or `free'. The behavior is undefined if
2557 you dereference this pointer.
2559 * The C library now runs on Sony NEWS m68k machines running either
2560 NewsOS 3 or NewsOS 4.
2562 * The new `syscall' function is a system-dependent primitive function
2563 for invoking system calls. It has the canonical behavior on Unix
2564 systems, including unreliable return values for some calls (such as
2565 `pipe', `fork' and `getppid').
2567 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2568 to `EAGAIN', which is the preferred name. On systems whose kernels
2569 use two distinct codes, the C library now translates EWOULDBLOCK to
2570 EAGAIN in every system call function.
2574 * The GNU C Library Reference Manual is now distributed with the library.
2575 `make dvi' will produce a DVI file of the printed manual.
2576 `make info' will produce Info files that you can read on line using C-h i
2577 in Emacs or the `info' program.
2578 Please send comments on the manual to bug-glibc-manual@gnu.org.
2580 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2582 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2584 * Jason Merrill has contributed a port to the Sequent Symmetry running
2585 Dynix version 3 (i386-sequent-dynix).
2587 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2588 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2590 * New function `memory_warnings' lets you arrange to get warnings when
2591 malloc is running out of memory to allocate, like Emacs gives you.
2593 * The C library now contains the relocating allocator used in Emacs 19 for
2594 its editing buffers. This allocator (ralloc) minimizes allocation
2595 overhead and fragmentation by moving allocated regions around whenever it
2596 needs to. You always refer to a ralloc'd region with a "handle" (a
2597 pointer to a pointer--an object of type `void **').
2599 * There is a new `printf' format: `%m' gives you the string corresponding
2600 to the error code in `errno'.
2602 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2603 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2604 pass, the `a' modifier says to fill in a `char **' you pass with a
2607 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2608 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2609 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2611 * `mkstemp' is a traditional Unix function to atomically create and open a
2612 uniquely-named temporary file.
2616 * The standard location for the file that says what the local timezone is
2617 has changed again. It is now `/usr/local/etc/localtime' (or more
2618 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2620 * The distribution no longer contains any files with names longer than 14
2623 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2624 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2626 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2630 * The configuration process has changed quite a bit. The `configure'
2631 script is now used just like the configuration scripts for other GNU
2632 packages. The `sysdeps' directory hierarchy is much rearranged.
2633 The file `INSTALL' explains the new scheme in detail.
2635 * The header files no longer need to be processed into ANSI C and
2636 traditional C versions. There is just one set of files to install, and
2637 it will work with ANSI or old C compilers (including `gcc -traditional').
2639 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2640 MIPS DECStation running Ultrix 4.
2642 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2643 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2644 made itself into a shared library.
2646 * Yet further improved support for the i386, running 4.3 BSD-like systems
2647 (such as Mach 3 with the Unix single-server), or System V.
2649 * New function `strncasecmp' to do case-insensitive string comparison
2650 with limited length.
2652 * New function `strsep' is a reentrant alternative to `strtok'.
2654 * New functions `scandir' and `alphasort' for searching directories.
2656 * New function `setenv' is a better interface to `putenv'.
2658 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2659 function for traversing a directory tree.
2661 * The GNU obstack package is now also part of the C library.
2662 The new function `open_obstack_stream' creates a stdio stream that
2663 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2664 formatted output directly to an obstack.
2666 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2667 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2669 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2671 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2672 things to your strings.
2674 * There are some new test programs: test-fseek, testmb, and testrand.
2676 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2677 These ports are not finished, but are a good starting place for really
2678 supporting those systems.
2680 * `/etc/localtime' is now the standard location for the file that says what
2681 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2682 This follows the general principle that `/etc' is the place for all local
2683 configuration files.
2685 * The C library header files now use `extern "C"' when used by the C++
2686 compiler, so the C library should now work with C++ code.
2688 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2689 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2692 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2693 function which uses the `merge sort' algorithm, and is said to be
2694 significantly faster than the old GNU `qsort' function. Merge sort is
2695 now the standard `qsort' function. The new algorithm can require a lot
2696 of temporary storage; so, the old sorting function is called when the
2697 required storage is not available.
2699 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2700 provides the Unix `crypt' function, plus some other entry points.
2702 * The code and header files taken from 4.4 BSD have been updated with the
2703 latest files released from Berkeley.
2705 ----------------------------------------------------------------------
2706 Copyright information:
2708 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2710 Permission is granted to anyone to make or distribute verbatim copies
2711 of this document as received, in any medium, provided that the
2712 copyright notice and this permission notice are preserved,
2713 thus giving the recipient permission to redistribute in turn.
2715 Permission is granted to distribute modified versions
2716 of this document, or of portions of it,
2717 under the above conditions, provided also that they
2718 carry prominent notices stating who last changed them.
2721 version-control: never