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 fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
11 the following new symbols are used: fts64_children, fts64_close,
12 fts64_open, fts64_read and fts64_set.
14 * getaddrinfo now detects certain invalid responses on an internal netlink
15 socket. If such responses are received, an affected process will
16 terminate with an error message of "Unexpected error <number> on netlink
17 descriptor <number>" or "Unexpected netlink response of size <number> on
18 descriptor <number>". The most likely cause for these errors is a
19 multi-threaded application which erroneously closes and reuses the netlink
20 file descriptor while it is used by getaddrinfo.
22 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
23 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
24 unnecessary serialization of memory allocation requests across threads.
25 The defect is now corrected. Users should see a substantial increase in
26 the concurent throughput of allocation requests for applications which
27 trigger this bug. Affected applications typically create create and
28 destroy threads frequently. (Bug 19048 was reported and analyzed by
31 * There is now a --disable-timezone-tools configure option for disabling the
32 building and installing of the timezone related utilities (zic, zdump, and
33 tzselect). This is useful for people who build the timezone data and code
34 independent of the GNU C Library.
36 * The LD_POINTER_GUARD environment variable can no longer be used to
37 disable the pointer guard feature. It is always enabled.
39 * The obsolete header <regexp.h> has been removed. Programs that require
40 this header must be updated to use <regex.h> instead.
42 * Optimized string, wcsmbs and memory functions for IBM z13.
43 Implemented by Stefan Liebler.
45 * The minimum GCC version that can be used to build this version of the GNU
46 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
47 still be used to compile programs using the GNU C Library.
49 * The following bugs are resolved with this release:
51 [The release manager will add the list generated by
52 scripts/list-fixed-bugs.py just before the release.]
56 * The following bugs are resolved with this release:
58 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
59 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
60 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
61 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
62 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
63 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
64 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
65 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
66 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
67 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
68 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
69 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
70 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
71 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
72 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
73 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
74 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
75 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
76 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
77 18657, 18676, 18694, 18696, 18887.
79 * Cache information can be queried via sysconf() function on s390 e.g. with
80 _SC_LEVEL1_ICACHE_SIZE as argument.
82 * A buffer overflow in gethostbyname_r and related functions performing DNS
83 requests has been fixed. If the NSS functions were called with a
84 misaligned buffer, the buffer length change due to pointer alignment was
85 not taken into account. This could result in application crashes or,
86 potentially arbitrary code execution, using crafted, but syntactically
87 valid DNS responses. (CVE-2015-1781)
89 * The time zone file parser has been made more robust against crafted time
90 zone files, avoiding heap buffer overflows related to the processing of
91 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
92 large time zone data files. Overly long time zone specifiers in the TZ
93 variable no longer result in stack overflows and crashes.
95 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
96 for LD and GD on x86 and x86-64, has been implemented. You will need
97 binutils-2.24 or later to enable this optimization.
99 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
100 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
101 Hat). These updates cause user visible changes, such as the fix for bug
104 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
105 and getXXbyYY NSS calls for the same database, causing a denial-of-service
106 condition in some applications.
108 * Added vector math library named libmvec with the following vectorized x86_64
109 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
111 The library can be disabled with --disable-mathvec. Use of the functions is
112 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
113 Shared library libmvec.so is linked in as needed when using -lm (no need to
114 specify -lmvec explicitly for not static builds).
115 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
117 * A new fmemopen implementation has been added with the goal of POSIX
118 compliance. The new implementation fixes the following long-standing
119 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
120 old implementation is still present for use be by existing binaries.
122 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
123 releases. It has been fixed to match 2.19 and older, but binaries built
124 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
126 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
127 Contributed by Roland McGrath (Google).
129 * The header <regexp.h> is deprecated, and will be removed in a future
130 release. Use of this header will trigger a deprecation warning.
131 Application developers should update their code to use <regex.h> instead.
133 This header was formerly part of SUS, but was deprecated in 1994 and
134 removed from the standard in 2001. Also, the glibc implementation
135 leaks memory. See BZ#18681 for more details.
139 * The following bugs are resolved with this release:
141 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
142 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
143 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
144 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
145 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
146 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
147 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
148 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
149 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
150 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
153 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
154 too little memory for the to-be-scanned arguments and overflow the
155 allocated buffer. The implementation now correctly computes the required
156 buffer size when using malloc, and switches to malloc from alloca as
159 * A new semaphore algorithm has been implemented in generic C code for all
160 machines. Previous custom assembly implementations of semaphore were
161 difficult to reason about or ensure that they were safe. The new version
162 of semaphore supports machines with 64-bit or 32-bit atomic operations.
163 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
164 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
166 * Port to Altera Nios II has been contributed by Mentor Graphics.
168 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
169 implementations for powerpc64/powerpc64le.
170 Implemented by Adhemerval Zanella (IBM).
172 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
173 and powerpc64le. This may improve lock scaling of existing programs on
174 HTM capable systems. The lock elision code is only enabled with
175 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
176 powerpc will issue a transaction abort on every syscall to avoid side
177 effects being visible outside transactions.
179 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
180 AArch64. Contributed by ARM Ltd.
182 * i386 memcpy functions optimized with SSE2 unaligned load/store.
184 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
185 under certain input conditions resulting in the execution of a shell for
186 command substitution when the application did not request it. The
187 implementation now checks WRDE_NOCMD immediately before executing the
188 shell and returns the error WRDE_CMDSUB as expected.
190 * CVE-2012-3406 printf-style functions could run into a stack overflow when
191 processing format strings with a large number of format specifiers.
193 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
194 infinite loop if the DNS response contained a PTR record of an unexpected
197 * The minimum GCC version that can be used to build this version of the GNU
198 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
199 still be used to compile programs using the GNU C Library.
201 * The GNU C Library is now built with -Werror by default. This can be
202 disabled by configuring with --disable-werror.
204 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
206 * The obsolete sigvec function has been removed. This was the original
207 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
208 programs have been using instead for about 25 years. Of course, ABI
209 compatibility for old binaries using sigvec remains intact.
211 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
212 with newer versions of bison.
214 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
215 The original MIPS o32 hard-float ABI requires an FPU where double-precision
216 registers overlay two consecutive single-precision registers. MIPS32R2
217 introduced a new FPU mode (FR=1) where double-precision registers extend the
218 corresponding single-precision registers which is incompatible with the
219 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
220 require the use of FR=1 making a transition necessary. New o32 ABI
221 extensions enable users to migrate over time from the original o32 ABI
222 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
223 tracks the ABI of any loaded object and verifies that new objects are
224 compatible. Mode transitions will also be requested as required and
225 unsupportable objects will be rejected. The ABI checks include both soft and
226 hard float ABIs for o32, n32 and n64.
228 GCC 5 with GNU binutils 2.25 onwards:
229 It is strongly recommended that all o32 system libraries are built using the
230 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
231 with the original and all new o32 ABI extensions. Configure a MIPS GCC
232 compiler using --with-fp-32=xx to set this by default.
236 * The following bugs are resolved with this release:
238 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
239 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
240 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
241 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
242 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
243 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
244 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
245 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
246 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
247 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
248 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
249 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
250 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
251 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
252 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
254 * Reverted change of ABI data structures for s390 and s390x:
255 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
256 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
257 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
258 are preserved pointing straight to the same implementation as the old ones.
259 Given that, new callers will simply provide a too-big buffer to these
260 functions. Any applications/libraries out there that embed jmp_buf or
261 ucontext_t in an ABI-relevant data structure that have already been rebuilt
262 against 2.19 headers will have to rebuilt again. This is necessary in any
263 case to revert the breakage in their ABI caused by the glibc change.
265 * Support for file description locks is added to systems running the
266 Linux kernel. The standard file locking interfaces are extended to
267 operate on file descriptions, not file descriptors, via the use of
268 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
269 are associated with an open file instead of a process.
271 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
273 * The minimum Linux kernel version that this version of the GNU C Library
274 can be used with is 2.6.32.
276 * Running the testsuite no longer terminates as soon as a test fails.
277 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
278 with PASS or FAIL lines for individual tests. A summary of the results is
279 printed, including a list of failing lists, and "make check" exits with
280 error status if there were any unexpected failures. "make check
281 stop-on-test-failure=y" may be used to keep the old behavior.
283 * The am33 port, which had not worked for several years, has been removed
286 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
287 supported; they now act the same as _DEFAULT_SOURCE (but generate a
288 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
289 conflicted with POSIX (support for which was removed in 2.19), the
290 interfaces those macros enabled remain available when compiling with
291 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
294 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
296 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
297 This may improve lock scaling of existing programs on TX capable systems.
298 The lock elision code is only built with --enable-lock-elision=yes and
299 then requires a GCC version supporting the TX builtins. With lock elision
300 default mutexes are elided via __builtin_tbegin, if the cpu supports
301 transactions. By default lock elision is not enabled and the elision code
304 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
305 copy the path argument. This allowed programs to cause posix_spawn to
306 deference a dangling pointer, or use an unexpected pathname argument if
307 the string was modified after the posix_spawn_file_actions_addopen
310 * All supported architectures now use the main glibc sysdeps directory
311 instead of some being in a separate "ports" directory (which was
312 distributed separately before glibc 2.17).
314 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
315 On configurations that support it (all Linux configurations), it's now
316 used regardless of the --enable-add-ons switch to configure. It is no
317 longer possible to build such configurations without pthreads support.
319 * Locale names, including those obtained from environment variables (LANG
320 and the LC_* variables), are more tightly checked for proper syntax.
321 setlocale will now fail (with EINVAL) for locale names that are overly
322 long, contain slashes without starting with a slash, or contain ".." path
323 components. (CVE-2014-0475) Previously, some valid locale names were
324 silently replaced with the "C" locale when running in AT_SECURE mode
325 (e.g., in a SUID program). This is no longer necessary because of the
328 * On x86-64, the dynamic linker's lazy-binding support is now compatible
329 with application code using Intel MPX instructions. (With all previous
330 versions, the MPX register state could be clobbered when making calls
331 into or out of a shared library.) Note that while the new dynamic
332 linker is compatible with all known x86 hardware whether or not it
333 supports Intel MPX, some x86 instruction-set emulators might fail to
334 handle the new instruction encodings. This is known to affect Valgrind
335 versions up through 3.9 (but will be fixed in the forthcoming 3.10
336 release), and might affect other tools that do instruction emulation.
338 * Support for loadable gconv transliteration modules has been removed.
339 The support for transliteration modules has been non-functional for
340 over a decade, and the removal is prompted by security defects. The
341 normal gconv conversion modules are still supported. Transliteration
342 with //TRANSLIT is still possible, and the //IGNORE specifier
343 continues to be supported. (CVE-2014-5119)
345 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
346 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
347 resulting a denial-of-service security vulnerability in applications which
348 use functions related to iconv. (CVE-2014-6040)
352 * The following bugs are resolved with this release:
354 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
355 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
356 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
357 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
358 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
359 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
360 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
361 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
362 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
363 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
364 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
365 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
366 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
367 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
368 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
369 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
370 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
371 16431, 16453, 16474, 16506, 16510, 16529
373 * Slovenian translations for glibc messages have been contributed by the
374 Translation Project's Slovenian team of translators.
376 * The public headers no longer use __unused nor __block. This change is to
377 support compiling programs that are derived from BSD sources and use
378 __unused internally, and to support compiling with Clang's -fblock
379 extension which uses __block.
381 * CVE-2012-4412 The strcoll implementation caches indices and rules for
382 large collation sequences to optimize multiple passes. This cache
383 computation may overflow for large collation sequences and may cause a
384 stack or buffer overflow. This is now fixed to use a slower algorithm
385 which does not use a cache if there is an integer overflow.
387 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
388 rules for large collation sequences to optimize multiple passes and falls
389 back to alloca if malloc fails, resulting in a possible stack overflow.
390 The implementation now falls back to an uncached collation sequence lookup
393 * CVE-2013-4788 The pointer guard used for pointer mangling was not
394 initialized for static applications resulting in the security feature
395 being disabled. The pointer guard is now correctly initialized to a
396 random value for static applications. Existing static applications need
397 to be recompiled to take advantage of the fix (bug 15754).
399 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
400 to the d_name member of struct dirent, or omit the terminating NUL
401 character. (Bugzilla #14699).
403 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
404 aligned_alloc functions could allocate too few bytes or corrupt the
405 heap when passed very large allocation size values (Bugzilla #15855,
408 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
409 for AF_INET6 has been fixed (Bugzilla #16072).
411 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
412 pap_CW, quz_PE, the_NP.
414 * Substantially revised locales: gd_GB, ht_HT
416 * The LC_ADDRESS field was updated to support country_car for almost all
419 * ISO 1427 definitions were updated.
421 * ISO 3166 definitions were updated.
423 * The localedef utility now supports --big-endian and --little-endian
424 command-line options to generate locales for a different system from that
425 for which the C library was built.
427 * Binary locale files now only depend on the endianness of the system for
428 which they are generated and not on other properties of that system. As a
429 consequence, binary files generated with new localedef may be incompatible
430 with old versions of the GNU C Library, and binary files generated with
431 old localedef may be incompatible with this version of the GNU C Library,
432 in the following circumstances:
434 + Locale files may be incompatible on m68k systems.
436 + Locale archive files (but not separate files for individual locales) may
437 be incompatible on systems where plain "char" is signed.
439 * The configure option --disable-versioning has been removed. Builds with
440 --disable-versioning had not worked for several years.
442 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
443 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
445 * SystemTap probes for malloc have been introduced.
447 * SystemTap probes for slow multiple precision fallback paths of
448 transcendental functions have been introduced.
450 * Support for powerpc64le has been added.
452 * The soft-float powerpc port now supports e500 processors.
454 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
456 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
457 set of header declarations that are enabled by default, even when other
458 feature test macros or compiler options such as -std=c99 would otherwise
459 disable some of those declarations.
461 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
462 conflict with POSIX. The libbsd-compat library (which was a dummy library
463 that did nothing) has also been removed.
465 * Preliminary documentation about Multi-Thread, Async-Signal and
466 Async-Cancel Safety has been added.
468 * Change of ABI data structures for s390 and s390x:
469 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
470 allow for future hardware extensions. All library functions that accept or
471 return these structures were versioned in order to provide backwards
472 compatibility with existing code. However, not all cases can be handled
473 with interface versioning. If an application embeds either structure into
474 another structure and that structure is passed to another compilation unit
475 which expects the newer larger-sized object then any access to the new
476 fields will result in undefined behaviour. Similarly any access to fields
477 that were moved by the enlarging of the structures will cause undefined
478 behaviour. To fix the undefined behaviour all objects that are part of the
479 final in-memory image must agree on the size of structures, and this may
480 require recompilation.
484 * The following bugs are resolved with this release:
486 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
487 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
488 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
489 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
490 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
491 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
492 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
493 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
494 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
495 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
496 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
497 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
498 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
501 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
502 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
503 Distributions can re-enable building and using pt_chown via the new configure
504 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
505 considerable security risks and should only be used if the distribution
506 understands and accepts the risks.
508 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
511 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
512 fixed (Bugzilla #15330).
514 * Add support for calling C++11 thread_local object destructors on thread
515 and program exit. This needs compiler support for offloading C++11
516 destructor calls to glibc.
518 * Improved worst case performance of libm functions with double inputs and
521 * Support for priority inherited mutexes in pthread condition variables on
522 non-x86 architectures.
524 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
526 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
528 * Optimized string functions for ARM. Implemented by Will Newton and
531 * Optimized libm functions for SPARC. Implemented by David S. Miller.
533 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
536 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
537 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
539 * Added a benchmark framework to track performance of functions in glibc.
541 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
542 It is based on draft TS 18661 and currently enabled as a GNU extension.
544 * On Linux, the clock function now uses the clock_gettime system call
545 for improved precision, rather than old times system call.
547 * Added support for version-3 tz format files. This is needed when using
548 the tz database release 2013e or later, and affects a few unusual cases --
549 currently only TZ='America/Godthab' for time stamps after 2037.
551 * Added new API functions pthread_getattr_default_np and
552 pthread_setattr_default_np to get and set the default pthread
553 attributes of a process.
555 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
556 This may improve lock scaling of existing programs on TSX capable systems.
557 When the --enable-lock-elision=yes parameter is specified at configure
558 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
561 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
562 availability). Implemented by Ryan S. Arnold.
564 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
568 * The following bugs are resolved with this release:
570 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
571 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
572 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
573 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
574 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
575 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
576 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
577 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
578 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
579 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
580 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
581 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
582 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
583 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
584 14879, 14889, 14893, 14898, 14914.
586 * Optimization of memcpy for MIPS.
588 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
589 EMFILE has been fixed (Bugzilla #14889).
591 * The add-on ports collection is now distributed in the "ports" subdirectory
592 of the main GNU C Library distribution, rather than separately.
594 * Port to ARM AArch64 contributed by Linaro.
596 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
597 Optimized versions of memcpy, memset, and memcmp added for System z10 and
599 Implemented by Andreas Krebbel.
601 * The new function secure_getenv allows secure access to the environment,
602 returning NULL if running in a SUID/SGID process. This function replaces
603 the internal function __secure_getenv.
605 * SystemTap static probes have been added into the dynamic linker.
606 Implemented by Gary Benson.
608 * Optimizations of string functions strstr, strcasestr and memmem.
609 Implemented by Maxim Kuvyrkov.
611 * The minimum Linux kernel version that this version of the GNU C Library
612 can be used with is 2.6.16.
614 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
615 powerpc POWER7. Implemented by Will Schmidt.
617 * New configure option --disable-nscd builds the C library such that it
618 never attempts to contact the Name Service Caching Daemon (nscd).
619 New configure option --disable-build-nscd avoids building nscd itself;
620 this is the default if --disable-nscd is used.
622 * Improved support for cross-compilation, including cross-testing and
623 bootstrap builds without a previously built glibc.
625 * Several testsuite tests are now able to test multiple IFUNC variants of an
626 interface, rather than just testing the one that would be chooen by
629 * New configure options --with-bugurl and --with-pkgversion, for
630 distributors to use to embed their bug-reporting and package version
631 information in --help and --version output.
633 * The ttyname and ttyname_r functions on Linux now fall back to searching for
634 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
635 allows creation of chroots without the procfs mounted on /proc.
637 * The `crypt' function now fails if passed salt bytes that violate the
638 specification for those values. On Linux, the `crypt' function will
639 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
640 enabled, and fail on encrypted strings using the MD5 or DES algorithm
641 when the mode is enabled.
643 * The `clock_*' suite of functions (declared in <time.h>) is now available
644 directly in the main C library. Previously it was necessary to link with
645 -lrt to use these functions. This change has the effect that a
646 single-threaded program that uses a function such as `clock_gettime' (and
647 is not linked with -lrt) will no longer implicitly load the pthreads
648 library at runtime and so will not suffer the overheads associated with
649 multi-thread support in other code such as the C++ runtime library.
651 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
656 * The following bugs are resolved with this release:
658 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
659 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
660 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
661 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
662 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
663 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
664 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
665 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
666 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
667 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
668 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
669 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
670 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
671 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
672 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
673 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
674 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
675 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
676 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
677 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
678 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
679 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
682 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
683 configuring glibc with:
684 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
685 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
686 Implemented by H.J. Lu.
690 + define static_assert
692 + do not declare gets
694 + declare at_quick_exit and quick_exit also for ISO C11
696 + aligned_alloc. NB: The code is deliberately allows the size parameter
697 to not be a multiple of the alignment. This is a moronic requirement
698 in the standard but it is only a requirement on the caller, not the
703 + uchar.h support added
705 + CMPLX, CMPLXF, CMPLXL added
707 Implemented by Ulrich Drepper.
709 * Support for the IA-64 has been moved to ports.
711 * Remove support for anything but ELF binary format
713 * Checking versions of poll, ppoll added.
714 Implemented by Ulrich Drepper.
716 * More generic and 64-bit performance optimizations to math functions.
717 Implemented by Ulrich Drepper.
719 * New configure option --enable-obsolete-rpc makes the deprecated RPC
720 headers and functions available at compile time as they were before
721 version 2.14. This option will be removed at some time in the future
722 after the TI-RPC library becomes fully sufficient for the needs of
723 existing applications.
725 * Compatibility code for Linux kernel versions before 2.4 has been removed.
726 Note that glibc is not expected to work with any Linux kernel version
729 * New header <sys/auxv.h> and function getauxval allowing easy access to
730 the AT_* key-value pairs passed from the Linux kernel. The header also
731 defines the HWCAP_* bits associated with the AT_HWCAP key.
733 * New locales: mag_IN
735 * New configure option --enable-systemtap builds SystemTap static probes
736 into libc for setjmp and longjmp and into libpthread for various operations.
737 So far the setjmp/longjmp probes and some of the libpthread probes are
738 provided only for i*86 and x86_64.
739 Implemented by Roland McGrath and Rayson Ho.
741 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
743 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
746 * More optimized functions for SPARC. Implemented by David S. Miller.
748 * Improved support for cross-compilation, especially bootstrap builds
749 without a previously built glibc.
751 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
752 Chris Metcalf from Tilera.
754 * Support for the old ARM ABI has been removed from ports. Only the EABI is
755 now supported for ARM processors.
757 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
758 as the name of the dynamic linker, to distinguish it from the
759 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
761 * Support for CRIS has been removed from ports.
763 * A new class of installed header has been documented for low-level
764 platform-specific functionality. PowerPC added the first instance with a
765 function to provide time base register access. Contributed by Tulio
766 Magno Quites Machado Filho.
768 * ix86 configurations now install header files that are consistent with
769 what x86-64 configurations install. These same header files can be used
770 for -m32, -m64, or -mx32 builds.
771 Contributed by H.J. Lu.
773 * Math library bug fixes. A thorough audit of all open math library bugs was
774 conducted by Joseph Myers. Significant progress was made on many math
775 library bugs resulting in more accurate exceptions and function results.
776 Many thanks to all those that contributed including Andreas Jaeger for his
777 patch review and work on the x87 trigonometric instruction issues.
779 * Timezone data is no longer installed. Timezone-related binaries and scripts
780 will continue to be installed. Users should obtain their timezone data from
781 their distribution provider or from the tzdata package at
782 <ftp://munnari.oz.au/pub/>.
786 * The following bugs are resolved with this release:
788 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
789 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
790 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
791 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
792 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
793 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
794 13484, 13506, 13515, 13523, 13524, 13538, 13540
796 * New program pldd to list loaded object of a process
797 Implemented by Ulrich Drepper.
799 * Add nss_db support back to glibc. No more dependency on Berkeley db
800 and support for initgroups lookups.
801 Implemented by Ulrich Drepper.
803 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
804 Contributed by HJ Lu.
806 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
807 Contributed by HJ Lu.
809 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
810 on x86-32 and x86-64.
811 Contributed by Liubov Dmitrieva.
813 * Optimized strchr and strrchr for SSE on x86-32.
814 Contributed by Liubov Dmitrieva.
816 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
817 for x86-64 and x86-32.
818 Contributed by Liubov Dmitrieva.
820 * New interfaces: scandirat, scandirat64
821 Implemented by Ulrich Drepper.
823 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
824 Implemented by Ulrich Drepper.
826 * nscd now also caches the netgroup database.
827 Implemented by Ulrich Drepper.
829 * Integrate libm with gcc's -ffinite-math-only option.
830 Implemented by Ulrich Drepper.
832 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
833 to math functions. Implemented by Ulrich Drepper.
835 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
836 Implemented by Ulrich Drepper.
838 * New Linux interfaces: process_vm_readv, process_vm_writev
840 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
841 Implemented by Ulrich Drepper.
843 * Optimized nearbyint and strcasecmp for PPC.
844 Implemented by Adhemerval Zanella.
846 * New locales: bho_IN, unm_US, es_CU, ta_LK
850 * The following bugs are resolved with this release:
852 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
853 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
854 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
855 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
856 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
857 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
858 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
859 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
860 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
861 12795, 12811, 12813, 12814, 12841
863 * The RPC implementation in libc is obsoleted. Old programs keep working
864 but new programs cannot be linked with the routines in libc anymore.
865 Programs in need of RPC functionality must be linked against TI-RPC.
866 The TI-RPC implementation is IPv6 enabled and there are other benefits.
868 Visible changes of this change include (obviously) the inability to link
869 programs using RPC functions without referencing the TI-RPC library and the
870 removal of the RPC headers from the glibc headers.
871 Implemented by Ulrich Drepper.
873 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
874 syncfs, setns, sendmmsg
876 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
877 yue_HK, lij_IT, mhr_RU
879 * New encodings: CP770, CP771, CP772, CP773, CP774
881 * New program sotruss to trace calls through PLTs
882 Implemented by Ulrich Drepper.
884 * The malloc hook implementation is marked deprecated and will be removed
885 from the default implementation in the next version. The design never
886 worked ever since the introduction of threads. Even programs which do
887 not create threads themselves can use multiple threads created internally.
891 * The following bugs are resolved with this release:
893 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
894 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
895 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
896 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
899 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
901 * POWER7 optimizations: memset, memcmp, strncmp
903 * New optimized string functions for x86-64: strnlen (SSE2),
904 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
905 Implemented by Ulrich Drepper.
909 * The following bugs are resolved with this release:
911 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
912 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
913 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
914 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
915 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
916 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
917 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
918 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
920 * New interfaces: pthread_getname_np, pthread_setname_np
922 * New Linux interface: recvmmsg
924 * STT_GNU_IFUNC implemented for Sparc by David Miller.
926 * The dynamic linker now recognizes supported ABI versions from the
927 EI_ABIVERSION field in the ELF header.
928 Implemented by Ulrich Drepper.
930 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
931 will not be used to fill in password fields in the passwd.byname replies.
932 Instead it is used to synthesize the shadow.byname table, should it be
933 missing. This is a useful mode in some installations involving Solaris.
934 Implemented by Ulrich Drepper.
936 * New locales: kok_IN, sq_MK, cv_RU
940 * The following bugs are resolved with this release:
942 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
943 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
944 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
945 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
946 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
947 10789, 10817, 10823, 10840, 10847
949 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
951 Implemented by Ulrich Drepper.
953 * Checking version of longjmp added that fails if an uninitialized stack
954 frame would be created. Implemented by Ulrich Drepper.
956 * STT_GNU_IFUNC is now supported in static executables.
957 Implemented by H.J. Lu.
959 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
961 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
962 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
963 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
964 Contributed by H.J. Lu.
966 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
967 Implemented by Ulrich Drepper.
969 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
971 Contributed by H.J. Lu.
973 * Support for fma instruction in AVX on x86-64.
974 Implemented by H.J. Lu and Ulrich Drepper.
976 * AVX support in x86-64 auditing support in ld.so.
977 Implemented by H.J. Lu.
979 * STB_GNU_UNIQUE support added.
980 Implemented by Ulrich Drepper.
982 * Implement second fallback mode for optimized DNS lookup for even more
983 broken environments. If two requests from the same port are not
984 handled correctly close the socket and open a new one before sending
985 the second request. The 'single-request-reopen' option in /etc/resolv.conf
986 can be used to select this mode right away, instead of rediscovering the
987 necessity is every process again.
988 Implemented by Ulrich Drepper.
990 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
991 Implemented by Adam Tkac.
993 * Optimized iconv conversions for S390x.
994 Implemented by Andreas Krebbel.
996 * Using condvars with PI mutexes is now more efficient due to kernel
997 support for requeueing to PI futexes. NPTL support added for x86-64.
998 Implemented by Ulrich Drepper.
1000 * New locales: ps_AF, my_MM
1004 * The following bugs are resolved with this release:
1006 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1007 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1008 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1009 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1010 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1012 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1013 Implemented by Ulrich Drepper.
1015 * New Linux interfaces: accept4, fallocate, fallocate64.
1016 Implemented by Ulrich Drepper.
1018 * Correct declarations of string function when used in C++ code. This
1019 could lead to compile errors for invalid C++ code.
1021 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1024 * New POSIX 2008 interface: psiginfo
1025 Implemented by Ulrich Drepper.
1027 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1028 Implemented by Ulrich Drepper.
1030 * Support for selecting between multiple function definitions at runtime
1031 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1033 * The libcrypt library can now use the hash function implementations in
1034 NSS. Implemented by Ulrich Drepper.
1036 * The malloc implementation can be compiled to be less memory efficient
1037 but higher performing in multi-threaded programs.
1038 Implemented by Ulrich Drepper.
1040 * New locales: nan_TW@latin, ks_IN
1042 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1043 Implemented by Ulrich Drepper.
1045 * Extended printf hook support. It is possible to use user-defined types
1046 and extend existing format specifiers.
1047 Implemented by Ulrich Drepper.
1049 * Handling for group shadow files has been added.
1050 Implemented by Ulrich Drepper.
1052 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1053 servers (the case, e.g., for some people using the built-in DNS
1054 server in ADSL modems/routers). There is a once-per-process timeout
1055 in case of a broken server. To avoid it, users can run nscd or put
1056 'options single-request' in /etc/resolv.conf.
1057 Implemented by Ulrich Drepper.
1061 * The following bugs are resolved with this release:
1063 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1064 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1065 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1066 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1067 6968, 6974, 6980, 6995, 7008, 7009, 7029
1069 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1070 up at the same time. Implemented by Ulrich Drepper.
1072 * TLS descriptors for LD and GD on x86 and x86-64.
1073 Implemented by Alexandre Oliva.
1075 * getaddrinfo now handles DCCP and UDPlite.
1076 Implemented by Ulrich Drepper.
1078 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1079 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1080 Implemented by Ulrich Drepper.
1082 * New implementation of memmem, strstr, and strcasestr which is O(n).
1083 Implemented by Eric Blake.
1085 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1087 * Implement "e" option for popen to open file descriptor with the
1088 close-on-exec flag set. Implemented by Ulrich Drepper.
1090 * Implement "b" mode for fmemopen. In this mode writes writes don't
1091 implicitly add a NUL byte and seeks from the end of the buffer really
1092 use the buffer end, not the string length as the basis.
1093 Implemented by Ulrich Drepper.
1095 * Many functions, exported and internal, now atomically set the close-on-exec
1096 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1098 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1100 Implemented by Pravin Satpute.
1102 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1106 * The following bugs are resolved with this release:
1108 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1109 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1110 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1111 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1112 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1113 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1114 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1116 * New locales: bo_CN, bo_IN, shs_CA.
1118 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1120 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1121 Implemented by Pravin Satpute.
1123 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1125 * nscd caches now all timeouts for DNS entries
1126 Implemented by Ulrich Drepper.
1128 * nscd is more efficient and wakes up less often.
1129 Implemented by Ulrich Drepper.
1131 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1132 vdprintf, and obstack_vprintf.
1133 Implemented by Jakub Jelinek.
1135 * Faster memset for x86-64.
1136 Implemented by Harsha Jagasia and H.J. Lu.
1138 * Faster memcpy on x86.
1139 Implemented by Ulrich Drepper.
1141 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1142 Implemented by Ulrich Drepper.
1144 * Faster sqrt and sqrtf implemention for some PPC variants.
1145 Implemented by Steven Munroe.
1149 * The following bugs are resolved with this release:
1151 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1152 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1153 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1154 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1155 5071, 5103, 5104, 5112, 5113, 5184, 5186
1157 * More checking functions: fread, fread_unlocked, open*, mq_open.
1158 Implemented by Jakub Jelinek and Ulrich Drepper.
1160 * Extend fortification to C++. Implemented by Jakub Jelinek.
1162 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1163 by not recognizing 'a' as a modifier when those specs are requested.
1164 Implemented by Jakub Jelinek.
1166 * PPC optimizations to math and string functions.
1167 Implemented by Steven Munroe.
1169 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1170 options to be passed. Implemented by Ulrich Drepper.
1172 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1174 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1175 Implemented by Ulrich Drepper.
1177 * Handle private futexes in the NPTL implementation.
1178 Implemented by Jakub Jelinek and Ulrich Drepper.
1180 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1181 Implemented by Roland McGrath and Ulrich Drepper.
1183 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1185 * SHA-256 and SHA-512 based password encryption.
1186 Implemented by Ulrich Drepper.
1188 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1189 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1192 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1193 Implemented by Ulrich Drepper.
1197 * The following bugs are resolved with this release:
1199 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1200 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1201 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1202 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1203 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1204 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1205 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1208 * New Linux interfaces: epoll_pwait, sched_getcpu.
1210 * New generic interfaces: strerror_l.
1212 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1216 * The following bugs are resolved with this release:
1218 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1219 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1220 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1221 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1222 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1223 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1224 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1225 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1226 3225, 3251, 3252, 3253, 3273
1228 * For Linux, the sorting of addresses returned by getaddrinfo now also
1229 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1230 Implemented by Ulrich Drepper.
1232 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1233 Implemented by Ulrich Drepper.
1235 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1237 * New iconv module for MIK. Contributed by Alexander Shopov.
1239 * For sites with broken group and/or passwd database, the auto-propagate
1240 option of nscd can prevent creating ID lookup entries from the results
1241 of a name lookup and vice versa. This usually is no problem but some
1242 site might have problems with the default behavior.
1243 Implemented by Ulrich Drepper.
1245 * Iterating over entire database in NIS can be slow. With the
1246 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1247 to trade time for memory. The entire database will be read at once.
1248 Implemented by Ulrich Drepper.
1250 * The interfaces introduced in RFC 3542 have been implemented by
1253 * Support for the new ELF hash table format was added by Ulrich Drepper.
1255 * Support for priority inheritance mutexes added by Jakub Jelinek and
1258 * Support for priority protected mutexes added by Jakub Jelinek.
1260 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1261 or_IN, csb_PL, fy_NL, sr_ME.
1265 * More overflow detection functions.
1267 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1268 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1270 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1271 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1272 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1273 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1274 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1275 by Masahide Washizawa.
1277 * It is now possible to install audit libraries for the dynamic linker using
1278 LD_AUDIT. Implemented by Ulrich Drepper.
1280 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1281 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1282 For a libc and libpthread that works well on Linux 2.4 kernels, we
1283 recommend using the stable 2.3 branch.
1285 * The new function open_wmemstream acts like open_memstream,
1286 but uses a wchar_t wide character buffer.
1288 * The new function ppoll is an improved version of poll, similar to pselect.
1290 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1291 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1292 renameat, unlinkat, linkat, symlinkat, readlinkat.
1294 * New Linux kernel system calls: unshare,
1295 inotify_init, inotify_add_watch, inotify_rm_watch.
1297 * The euidaccess function is now also known by the alias eaccess,
1298 for compatibility with some other systems.
1300 * Timezone data updated to 2006b version.
1304 * The following bugs are resolved with this release:
1306 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1307 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1308 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1309 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1310 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1311 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1313 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1315 * As of this release, GCC 4 can be used to compile the C Library.
1317 * Timezone data updated to 2005m version.
1321 * The following bugs are resolved with this release:
1323 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1324 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1325 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1326 777, 787, 821, 822, 823, 825
1328 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1332 * Support for RFC 3678. Real implementations exist only for Linux so far.
1333 Implemented by Ulrich Drepper.
1335 * nscd can now cache entries persistently. Expiring entries are reloaded.
1336 For speedups the cache can be shared in memory with client processes.
1337 Implemented by Ulrich Drepper.
1339 * nscd can now perform SELinux checks.
1340 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1342 * getaddrinfo queries are now cached. Canonical name lookup is performed
1344 Implemented by Ulrich Drepper.
1346 * The nothrow function attribute is used when headers are used by gcc when
1347 compiling C code. This can avoid significant amounts of exception
1350 * The malloc functions perform more error checking and are stricter when
1351 it comes to reacting on errors. The default action is to terminate
1352 the process after showing an error message. Implemented by Ulrich Drepper.
1354 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1355 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1357 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1358 namespaces using the new function dlmopen(). This feature is of course,
1359 like most other dynamic loading functionality, not available in statically
1360 linked applications. Implemented by Ulrich Drepper.
1362 * Low-overhead boundary checking variants of string and some stdio functions
1363 were added. These are to be used in conjunction with a gcc patch by
1364 Jakub Jelinek which adds calls to these functions if possible.
1365 Implemented by Jakub Jelinek and Ulrich Drepper.
1367 * Old code for several operating systems and machine architectures that
1368 have not been in working condition in a long time have been removed from
1369 the main source tree maintained by the GNU C Library's maintainers.
1370 These files are now reside in the separate `ports' source module
1371 that is usable as an add-on when building the library.
1375 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1376 interrogate the dynamic linker, compatible with the Solaris interface.
1378 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1379 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1381 * getifaddrs now uses the netlink interface on Linux to get its information.
1382 Implemented by Thorsten Kukuk.
1384 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1385 Implemented by Ulrich Drepper.
1387 * support for non-executable stacks on x86 has been added. Changes mostly
1390 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1393 * getaddrinfo now performs destination address selection according to
1398 * Thread-safe interfaces for many functions that access locale data
1399 were added in version 2.3, but these features were omitted from NEWS.
1400 Many functions have variants with an `_l' suffix that take a `locale_t'
1401 object as a parameter rather than consulting the current locale.
1402 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1403 create and maintain `locale_t' objects. Additionally, the new function
1404 `uselocale' sets "the current locale" (as used by functions not so
1405 parameterized) set for an individual thread. These features were added
1406 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1408 * The functions getresuid, getresgid, setresuid, and setresgid, which
1409 have long been available on Linux, are now declared in <unistd.h>
1410 and are now also available on the Hurd.
1412 * ELF thread-local storage support (TLS) now works on x86-64.
1414 * The new dynamic string token $LIB is expanded in shared library names.
1415 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1417 * Aldy Hernandez contributed complete software floating point support for
1418 PowerPC machines with no FPU.
1420 * fexecve is implemented on Linux.
1422 * The `btowc' function should work at least twice as fast due to
1423 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1425 * With approriate thread add-ons cancelable functions are now implemented
1426 in libc.so as well. No need to call the function in libpthread. This
1427 change allowed to finally disable the incorrect and expensive handling
1428 of weak definition in ld.so.
1430 * Yet more PLT entries in libc.so have been removed. We finally arrived
1431 at the bare minimum. Startup times improved appropriately.
1433 * Support for the new Linux/x86 system call interface was added. The
1434 AT_SYSINFO auxiliary vector entry is recognized and handled.
1438 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1441 * iconv (the program and the interface) now accepts empty names (excluding
1442 options like //TRANSLIT) to mean "use charset of current locale".
1444 * localedef can now transliterate characters in strings which are not in
1445 the provided charmap. The information from the input locale is used.
1447 * Prelinking support was added for ELF targets. This requires additional
1448 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1450 * Read-only stdio streams now use mmap to speed up operation by eliminating
1451 copying and buffer underflows. To use add 'm' to the mode string of
1452 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1454 * The malloc functions were completely rewritten by Wolfram Gloger based
1455 on Doug Lea's malloc-2.7.0.c.
1457 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1458 implementation of regex.
1460 * Bruno Haible upgraded the iconv and locale implementation to support
1463 * Contents of the LC_* and LANG environment variables in the CEN style are
1464 not recognized anymore. It never was used. Change by Ulrich Drepper.
1466 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1467 thread-local storage (TLS) ABI on some platforms.
1468 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1470 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1471 EUC-JISX0213, and TSCII.
1473 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1474 BSD-compatible interface for getting all network interface addresses.
1475 Implementation for IPv4 by Roland McGrath.
1477 * Loading of locale data is faster due to the introduction of a locale
1478 archive. Implemented by Roland McGrath and Ulrich Drepper.
1480 * Startup times are significantly reduced by not using exported functions
1481 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1484 * Steven Munroe contributed a port to PowerPC64/Linux.
1488 * The Hurd now uses the GNU libio implementation of stdio rather than the
1489 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1491 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1492 with the same behavior as the Linux system call of the same name.
1496 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1497 128-bit long double format.
1499 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1500 IBM1161, and IBM1162 charsets.
1502 * Andreas Jaeger contributed a port to x86-64/Linux.
1504 * Peter Bruin contributed a port to PowerPC/Hurd.
1506 * libc functions using I/O streams now can handle wide-oriented streams
1509 * optimizations in the dynamic linker. Binaries created by recent binutils
1510 versions start up quicker due to reduced time spent on relocations.
1512 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1516 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1517 asinh, atanh, j0 for the 128-bit long double format.
1519 * Bruno Haible updated all the code handling Unicode in some form to
1520 support Unicode 3.1.
1522 * Speed of regex for single-byte locales is back to previous levels.
1523 Patch by Isamu Hasegawa.
1525 * Alpha, SPARC, and IA-64 now also using floating stacks.
1527 * Startup time of internationalized applications greatly improved through
1528 iconv cache. Use iconvconfig to generate the cache file.
1529 Contributed by Ulrich Drepper.
1531 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1532 severe performance problems. Patch by David Mosberger.
1534 * The Hurd port got a lot more functionality like AIO, various stdio
1535 extensions, etc. Mainly done by Roland McGrath.
1537 * mtrace can now lookup symbols in shared libraries.
1541 * Intel's IA-64 math library is largely integrated. It provides fast and
1542 accurate implementatations for most basic and standard math functions
1543 in float, double, and long double format.
1545 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1546 and asin for the 96-bit long double format and asin, log, tan for the
1547 128-bit long double format.
1549 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1550 The basic double functions exist today. Contributed by Abraham Ziv
1551 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1552 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1554 * An asynchronous name lookup library was added. The interface is designed
1555 after POSIX AIO. The proposal was circulated beforehand to get comments.
1556 No negative ones came in. Implemented by Ulrich Drepper.
1558 * Port to S390/64bit contributed by Martin Schwidefsky
1559 <schwidefsky@de.ibm.com>.
1561 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1562 of functions for Linux/IA-64.
1564 * The RPC code is now thread safe. Threads can now use the same service
1565 of different services at the same time. Patch by Eric Norum
1566 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1568 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1569 family of functions for Linux/S390.
1571 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1572 of functions for Linux/x86.
1574 * Port to Linux/CRIS contributed by Axis Communications.
1578 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1579 we can now check for namespace violations and missing declarations. The
1580 result is that almost all headers are now Unix-compliant (as defined in
1581 the upcoming XPG6). The negative side is that some programs might need
1582 corrections, too, if they depend on the incorrect form of the headers in
1583 previous versions which defined too many symbols and included too many
1586 * regex now handles multibyte character sets correctly.
1587 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1589 * iconv (the program) does now conform to the upcoming XPG6 and handles
1590 charmaps. Instead of the charset names the path of charmaps can be
1591 provided and the conversion happens based on this data.
1592 Contributed by Ulrich Drepper.
1594 * The locale program now provides detailed information about the installed
1599 only lists the names of the supported locales
1603 provides details such as country, language, and codeset name.
1604 Contributed by Ulrich Drepper.
1608 * The gencat program now parses the input file according to the charset
1609 selected by the LC_CTYPE category. This is important for stateful
1610 character sets. To make generating catalogs easier there is a way
1611 to overwrite the charset selected by the locale: before the first
1612 message or $ quote line the catalog can contain a line like
1614 $ codeset=ISO-8859-2
1616 to select the charset (ISO-8859-2 in this case).
1618 Implemented by Shinya Hanataka and Ulrich Drepper.
1620 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1621 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1622 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1624 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1625 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1627 * The LANGUAGE environment variable is now ignored unless the locale is
1628 changed from the default "C" locale.
1630 * The usual bug fixes.
1634 * Greg McGary added runtime support for bounds checking using gcc's
1635 new -fbounded-pointers option. ix86 target is complete. PowerPC
1638 * Thorsten Kukuk added secure mode support to nscd.
1640 * The Berkeley db libraries have been removed.
1642 Related, the nss_db module is now in a separate package since it
1643 obviously requires a database library being available.
1645 * Wide character I/O streams implemented by Ulrich Drepper.
1647 * Functions from the extended socket API added by Ulrich Drepper.
1649 * Functions feenableexcept and fedisableexcept to control the
1650 behaviour of individual exceptions have been added by Andreas Jaeger.
1652 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1654 * The resolver code has been updated from bind 8.2.3-T5B which supports
1655 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1658 This change could in some situations effect backward compatibility. Since
1659 now `_res' is a thread-local instead of a global variable, modifying it
1660 in one thread does not have any effect in other threads.
1662 The resolver library was also extended to allow IPv6 as the transport
1663 protocol for the requests. This work was done by Stig Venaas.
1665 * Compatibility code for K&R C compilers has been removed from the
1666 header files. A ISO C compiler is needed to use the library
1667 (conforming to either C89 or C99 standard).
1669 * Complete rewrite of the localedef program to support multibyte character
1670 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1671 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1672 Implemented by Ulrich Drepper.
1674 Bruno Haible significantly improved the generation and use of the data
1675 structures for the wide character tables.
1677 * Plural handling in gettext implemented by Ulrich Drepper.
1679 * The utmp daemon has been removed.
1681 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1683 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1686 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1688 * POSIX barriers implemented by Kaz Kylheku.
1690 * POSIX spawn function family implemented by Ulrich Drepper.
1692 * POSIX spinlocks are now available.
1694 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1696 * the configure option --enable-kernel=X.Y.Z allows to strip out
1697 compatibility for kernel versions before X.Y.Z. This is currently only
1698 implemented for Linux.
1700 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1701 field sin6_scope_id. This means that all programs using IPv6 should be
1702 recompiled. Don't expect binary compatibility with previous glibc
1705 * various conversion modules for IBM character sets contributed by
1708 * IA-64 port by Jes Sorensen and HJ Lu.
1722 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1724 * New xdr functions are added; some rpc functions are now 64bit clean.
1726 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1728 * Fixed known incompatibilities with glibc 2.0.
1730 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1732 * Optimized a number of functions (especially the ELF dynamic loader).
1734 * Update timezone data files.
1736 * lots of charmaps corrections
1738 * some new locale definitions and charmaps
1743 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1744 conform to POSIX member type requirements. Symbol versions have been
1745 adjusted as needed within the library, and for direct use by applications,
1746 but there is potential for problems if third-party libraries use
1747 struct timeval as part of their interface. This does not present
1748 a problem for X and other "essential" system libraries.
1750 * An additional locale model to support C++ Standard Library locale
1751 model and probably more was implemented by Ulrich Drepper.
1753 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1756 * Miles Bader provided the `argp' function family to support hierachical
1757 command line argument parsing, layered on top of getopt.
1759 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1761 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1764 * scanf recognizes the %a and %A format for scanning floating point numbers.
1766 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1767 information and interfaces for the available integer types.
1769 * about 130 new math functions were added to implement the ISO C9x math
1772 * the new header <complex.h> contains definitions of the complex math
1773 functions from ISO C 9X.
1775 * the new header <tgmath.h> defines generic macros to use complex or
1776 real valued functions.
1778 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1780 * Andreas Jaeger provided a test suite for the math library.
1782 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1784 * Ulrich Drepper added character set conversion functions (iconv).
1786 * Optimized string functions have been added.
1788 * The localedata addon is now part of glibc.
1790 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1792 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1793 daemon for NSS (nscd).
1795 Missing a better place here are some numbers on improvements. Under
1796 Linux 2.1.125 un-tar-ing the kernel sources takes
1800 using local files 12.19s 6.88s 22.91s
1802 using NIS 13.92s 8.91s 26.34s
1804 using NIS & nscd 10.37s 7.34s 25.30s
1806 using NIS+ 27.57s 30.37s 640.46s
1808 using NIS+ & nscd 10.25s 7.83s 26.51s
1810 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1812 Keep in mind that non-namelookup related operations dominate above times.
1813 It was just a common complain that using NIS+ unpacking the kernel is
1816 [1] The old nscd implementation is not available anymore since it was
1817 distributed with glibc up to version 2.0.98 and thus is now replaced.
1819 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1821 * Mark Kettenis provided a Hesiod NSS module.
1823 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1824 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1826 * rcmd can now handle netgroups (Dick Streefland).
1828 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1831 * Support for the IPv6 protocol has been added to the socket API, as per the
1832 latest draft standards.
1834 * Support for Linux 2.2 has been added.
1836 * Interface changes relative to the latest 2.0.x release:
1837 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1838 addseverity NEW: Unix98
1839 alphasort64 NEW: LFS
1840 argp_err_exit_status NEW: argp, GNU ext
1841 argp_error NEW: argp, GNU ext
1842 argp_failure NEW: argp, GNU ext
1843 argp_help NEW: argp, GNU ext
1844 argp_parse NEW: argp, GNU ext
1845 argp_program_bug_address NEW: argp, GNU ext
1846 argp_program_version NEW: argp, GNU ext
1847 argp_program_version_hook NEW: argp, GNU ext
1848 argp_state_help NEW: argp, GNU ext
1849 argp_usage NEW: argp, GNU ext
1850 authdes_create NEW: Secure RPC
1851 authdes_getucred NEW: Secure RPC
1852 authdes_pk_create NEW: Secure RPC
1853 backtrace NEW: GNU ext.
1854 backtrace_symbols NEW: GNU ext.
1855 backtrace_symbols_fd NEW: GNU ext.
1857 cacosf NEW: ISO C 9x
1858 cacosh NEW: ISO C 9x
1859 cacoshf NEW: ISO C 9x
1860 cacoshl NEW: ISO C 9x
1861 cacosl NEW: ISO C 9x
1868 casinf NEW: ISO C 9x
1869 casinh NEW: ISO C 9x
1870 casinhf NEW: ISO C 9x
1871 casinhl NEW: ISO C 9x
1872 casinl NEW: ISO C 9x
1874 catanf NEW: ISO C 9x
1875 catanh NEW: ISO C 9x
1876 catanhf NEW: ISO C 9x
1877 catanhl NEW: ISO C 9x
1878 catanl NEW: ISO C 9x
1879 cbc_crypt NEW: Secure RPC
1883 ccoshf NEW: ISO C 9x
1884 ccoshl NEW: ISO C 9x
1890 cimagf NEW: ISO C 9x
1891 cimagl NEW: ISO C 9x
1892 clearerr_locked REMOVED
1893 clntunix_create NEW: sunrpc ext
1895 clog10 NEW: ISO C 9x
1896 clog10f NEW: ISO C 9x
1897 clog10l NEW: ISO C 9x
1907 cprojf NEW: ISO C 9x
1908 cprojl NEW: ISO C 9x
1910 crealf NEW: ISO C 9x
1911 creall NEW: ISO C 9x
1916 csinhf NEW: ISO C 9x
1917 csinhl NEW: ISO C 9x
1920 csqrtf NEW: ISO C 9x
1921 csqrtl NEW: ISO C 9x
1925 ctanhf NEW: ISO C 9x
1926 ctanhl NEW: ISO C 9x
1928 des_setparity NEW: Secure RPC
1929 ecb_crypt NEW: Secure RPC
1930 endutxent NEW: Unix98
1932 exp10f NEW: ISO C 9x
1933 exp10l NEW: ISO C 9x
1937 fattach NEW: STREAMS
1938 fdetach NEW: STREAMS
1942 feclearexcept NEW: ISO C 9x
1943 fegetenv NEW: ISO C 9x
1944 fegetexceptflag NEW: ISO C 9x
1945 fegetround NEW: ISO C 9x
1946 feholdexcept NEW: ISO C 9x
1948 feraiseexcept NEW: ISO C 9x
1949 ferror_locked REMOVED
1950 fesetenv NEW: ISO C 9x
1951 fesetexceptflag NEW: ISO C 9x
1952 fesetround NEW: ISO C 9x
1953 fetestexcept NEW: ISO C 9x
1954 feupdateenv NEW: ISO C 9x
1955 fflush_locked REMOVED
1959 fgets_unlocked NEW: GNU ext.
1960 fileno_locked REMOVED
1972 fputc_locked REMOVED
1973 fputs_unlocked NEW: GNU ext.
1974 fread_unlocked NEW: GNU ext.
1979 fstatvfs NEW: Unix98
1983 ftruncate64 NEW: LFS
1985 fwrite_unlocked NEW: GNU ext.
1986 gai_strerror NEW: IPv6
1990 getchar_locked REMOVED
1992 getdate_err NEW: Unix98
1993 getdate_r NEW: GNU ext.
1995 getnameinfo NEW: IPv6
1996 getnetname NEW: Secure RPC
1997 getpmsg NEW: STREAMS
1998 getpt NEW: Unix98 PTY
1999 getrlimit64 NEW: LFS
2000 getutxent NEW: Unix98
2001 getutxid NEW: Unix98
2002 getutxline NEW: Unix98
2003 glob64 NEW: GNU ext.
2004 globfree64 NEW: GNU ext.
2005 gnu_get_libc_release NEW: GNU ext.
2006 gnu_get_libc_version NEW: GNU ext.
2007 grantpt NEW: Unix98 PTY
2008 host2netname NEW: Secure RPC
2010 iconv_close NEW: iconv
2011 iconv_open NEW: iconv
2012 if_freenameindex NEW: IPv6
2013 if_indextoname NEW: IPv6
2014 if_nameindex NEW: IPv6
2015 if_nametoindex NEW: IPv6
2016 in6addr_any NEW: IPv6
2017 in6addr_loopback NEW: IPv6
2018 inet6_isipv4mapped NEW: IPv6
2019 isastream NEW: STREAMS
2020 iswblank NEW: GNU ext.
2021 key_decryptsession NEW: Secure RPC
2022 key_decryptsession_pk NEW: Secure RPC
2023 key_encryptsession NEW: Secure RPC
2024 key_encryptsession_pk NEW: Secure RPC
2025 key_gendes NEW: Secure RPC
2026 key_get_conv NEW: Secure RPC
2027 key_secretkey_is_set NEW: Secure RPC
2028 key_setnet NEW: Secure RPC
2029 key_setsecret NEW: Secure RPC
2030 llrint NEW: ISO C 9x
2031 llrintf NEW: ISO C 9x
2032 llrintl NEW: ISO C 9x
2033 llround NEW: ISO C 9x
2034 llroundf NEW: ISO C 9x
2035 llroundl NEW: ISO C 9x
2040 lrintf NEW: ISO C 9x
2041 lrintl NEW: ISO C 9x
2042 lround NEW: ISO C 9x
2043 lroundf NEW: ISO C 9x
2044 lroundl NEW: ISO C 9x
2046 makecontext NEW: Unix98
2047 mempcpy NEW: GNU ext.
2050 modify_ldt NEW: kernel
2054 nearbyint NEW: ISO C 9x
2055 nearbyintf NEW: ISO C 9x
2056 nearbyintl NEW: ISO C 9x
2057 netname2host NEW: Secure RPC
2058 netname2user NEW: Secure RPC
2059 nexttoward NEW: ISO C 9x
2060 nexttowardf NEW: ISO C 9x
2061 nexttowardl NEW: ISO C 9x
2065 passwd2des NEW: Secure RPC
2067 pow10f NEW: GNU ext.
2068 pow10l NEW: GNU ext.
2071 printf_size NEW: GNU ext.
2072 printf_size_info NEW: GNU ext.
2073 profil_counter REMOVED
2074 pthread_mutexattr_getkind_np REPLACED
2075 pthread_mutexattr_setkind_np REPLACED
2076 ptsname NEW: Unix98 PTY
2077 ptsname_r NEW: Unix98 PTY
2079 putchar_locked REMOVED
2080 putgrent NEW: GNU ext.
2082 putpmsg NEW: STREAMS
2083 pututxline NEW: Unix98
2087 readdir64_r NEW: LFS
2088 remquo NEW: ISO C 9x
2089 remquof NEW: ISO C 9x
2090 remquol NEW: ISO C 9x
2092 roundf NEW: ISO C 9x
2093 roundl NEW: ISO C 9x
2095 scalbln NEW: ISO C 9x
2096 scalblnf NEW: ISO C 9x
2097 scalblnl NEW: ISO C 9x
2099 sendfile NEW: kernel
2100 setcontext NEW: Unix98
2101 setrlimit64 NEW: LFS
2102 setutxent NEW: Unix98
2104 sigignore NEW: Unix98
2105 sigqueue NEW: POSIX.1b
2106 sigrelse NEW: Unix98
2107 sigset NEW: POSIX.1b
2108 sigtimedwait NEW: POSIX.1b
2109 sigwaitinfo NEW: POSIX.1b
2110 sincos NEW: GNU ext.
2111 sincosf NEW: GNU ext.
2112 sincosl NEW: GNU ext.
2116 strcasestr NEW: GNU ext.
2117 strtoimax NEW: ISO C 9x
2118 strtoumax NEW: ISO C 9x
2119 strverscmp NEW: GNU ext.
2120 svcauthdes_stats NEW: Secure RPC
2121 svcunix_create NEW: sunrpc etx
2122 svcunixfd_create NEW: sunrpc ext
2123 swapcontext NEW: Unix98
2124 tcgetsid NEW: Unix98 PTY
2125 tdestroy NEW: GNU ext.
2126 tgamma NEW: ISO C 9x
2127 tgammaf NEW: ISO C 9x
2128 tgammal NEW: ISO C 9x
2132 truncf NEW: ISO C 9x
2133 truncl NEW: ISO C 9x
2135 unlockpt NEW: Unix98 PTY
2136 updwtmpx NEW: Unix98
2137 user2netname NEW: Secure RPC
2138 utmpxname NEW: Unix98
2139 versionsort NEW: GNU ext.
2140 versionsort64 NEW: GNU ext.
2142 wcscasecmp NEW: GNU ext.
2143 wcsncasecmp NEW: GNU ext.
2144 wcsnlen NEW: GNU ext.
2145 wcstoimax NEW: ISO C 9x
2146 wcstoll NEW: ISO C 9x
2147 wcstoull NEW: ISO C 9x
2148 wcstoumax NEW: ISO C 9x
2150 wordexp NEW: POSIX.2
2151 wordfree NEW: POSIX.2
2152 write_profiling REMOVED
2153 xdecrypt NEW: Secure RPC
2154 xdr_authdes_cred NEW: Secure RPC
2155 xdr_authdes_verf NEW: Secure RPC
2156 xdr_cryptkeyarg NEW: Secure RPC
2157 xdr_cryptkeyarg2 NEW: Secure RPC
2158 xdr_cryptkeyres NEW: Secure RPC
2159 xdr_getcredres NEW: Secure RPC
2160 xdr_key_netstarg NEW: Secure RPC
2161 xdr_key_netstres NEW: Secure RPC
2162 xdr_keybuf NEW: Secure RPC
2163 xdr_keystatus NEW: Secure RPC
2164 xdr_netnamestr NEW: Secure RPC
2165 xdr_sizeof NEW: Secure RPC
2166 xdr_unixcred NEW: sunrpc ext
2167 xencrypt NEW: Secure RPC
2168 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2179 * inet_ntoa is thread-safe
2181 * updwtmp is moved from libutil to libc
2183 * rewrite of cbrt function
2185 * update of timezone data
2199 * add atoll function
2201 * fix complex problems in Berkeley DB code
2203 * fix math functions
2207 * fixed lots of header problems (especially Linux/GNU specific)
2209 * dynamic loader preserves all registers
2211 * Roland McGrath provided support for handling of auxiliary objects in
2212 the ELF dynamic loader.
2214 * support for parallel builds is improved
2218 * GNU extensions are no longer declared by default. To enable them you
2219 must define the macro `_GNU_SOURCE' in your program or compile with
2222 * The library has changed from using GNU ld symbol aliases to using weak
2223 symbols where available. The ELF object file format supports weak
2224 symbols; GNU ld also supports weak symbols in the a.out format. (There
2225 is also now support for other GNU ld extensions in ELF. Use the
2226 `--with-elf' option to configure to indicate you have ELF, and
2227 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2228 of many files which contained only symbol aliases, reducing the size of
2229 the source and the compiled library; many other files were renamed to
2230 less cryptic names previously occupied by the symbol alias files.
2231 There is a new header file <elf.h> for programs which operate on
2232 files in the ELF format.
2234 * Converted to Autoconf version 2, so `configure' has more options.
2235 Run `configure --help' to see the details.
2237 * The library can now be configured to build profiling, highly-optimized
2238 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2239 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2240 `configure' enable building these extra libraries. The shared library is
2241 built by default when using both ELF and GNU ld. When shared libraries
2242 are enabled, the new library `-ldl' is available for arbitrary run-time
2243 loading of shared objects; its interface is defined in <dlfcn.h>. The
2244 new header file <link.h> gives access to the internals of the run-time
2245 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2246 application of same name on other systems and it provides information
2247 about dynamically linked binaries.
2249 * The C library now provides the run-time support code for profiling
2250 executables compiled with `-pg'. Programs can control the profiling code
2251 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2252 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2253 the support for this file format was contributed by David Mosberger-Tang.
2255 * The math code has been replaced with a math library based on fdlibm from
2256 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2257 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2258 functions. The math functions now reside in a separate library, so
2259 programs using them will need to use `-lm' their linking commands.
2261 * John C. Bowman contributed optimized ix87 assembler inline functions.
2263 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2264 mechanism similar to that found in Solaris 2. This is now used for the
2265 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2266 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2267 file controls what services are used for each individual database. This
2268 works by loading shared libraries with names specified in `nsswitch.conf',
2269 so service modules can be changed or added at any time without even
2270 relinking any program. Currently there are the file, db, and NIS based
2271 NSS services available.
2273 * The new functions `strtoq' and `strtouq' parse integer values from
2274 strings, like `strtol' and `strtoul', but they return `long long int' and
2275 `unsigned long long int' values, respectively (64-bit quantities).
2277 * The new functions `strtof' and `strtold' parse floating-point values from
2278 strings, like `strtod', but they return `float' and `long double' values,
2279 respectively (on some machines `double' and `long double' are the same).
2281 * Ulrich Drepper has contributed new implementations of the floating-point
2282 printing and reading code used in the `printf' family of functions and
2283 `strtod', `strtof', and `strtold'. These new functions are perfectly
2284 accurate, and much faster than the old ones.
2286 * The implementation of the POSIX locale model was completely rewritten by
2287 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2288 to compile the POSIX locale definition.
2290 * The former dummy implementations of the strcoll and strxfrm function are
2291 now replaced by fully functional code contributed by Ulrich Drepper. The
2292 collation information comes from the POSIX locale definitions.
2294 * The new header <langinfo.h> defines an interface for accessing
2295 various locale-dependent data (using the locale chosen with `setlocale').
2297 * Ulrich Drepper has contributed a new suite of functions for operation on
2298 wide-character and multibyte-character strings, in <wchar.h>;
2299 and classification and case conversion of wide characters, in <wctype.h>.
2300 These new functions are conforming to the ISO C, Amendement 1 specification.
2302 * There is now a second implementation of the standard I/O library available.
2303 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2304 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2306 * You can now use positional parameter specifications in format strings
2307 for the `printf' and `scanf' families of functions. For example,
2308 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2309 ``Number 6, Mr Jones''. This is mainly useful when providing different
2310 format strings for different languages, whose grammars may dictate
2311 different orderings of the values being printed. To support this
2312 feature, the interface for `register_printf_handler' has changed; see
2313 the header file <printf.h> for details.
2315 * The `printf' and `scanf' families of functions now understand a new
2316 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2317 to group numbers as indicated by the locale; for `scanf' and friends, this
2318 says to accept as valid only a number with all the proper grouping
2319 separators in the right places. In the default "C" locale, numbers are
2320 not grouped; but locales for specific countries will define the usual
2321 conventions (i.e. separate thousands with `,' in the US locale).
2323 * The pgrp functions have been regularized, slightly incompatibly but much
2324 less confusingly. The core functions are now `getpgid' and `setpgid',
2325 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2326 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2327 provided for compatibility. There is no longer an incompatible `getpgrp'
2328 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2330 * The new header file <fts.h> and suite of functions simplify programs that
2331 operate on directory trees. This code comes from 4.4 BSD.
2333 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2334 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2335 NSS scheme used in glibc.
2337 * There is a new malloc debugging hook `__memalign_hook'.
2339 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2340 `unsigned int' in <sys/types.h>. These are for compatibility only and
2341 their use is discouraged.
2343 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2344 done differently, so that it works even without GNU ld.
2346 * New function `euidaccess' checks allowed access to a file like `access',
2347 but using the effective IDs instead of the real IDs.
2349 * The time zone data files have been updated for the latest and greatest
2350 local time conventions of the countries of the world.
2352 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2355 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2356 for formatting floating-point numbers. They are provided only for
2357 compatibility; new programs should use `sprintf' instead. There are
2358 also equivalent function for the `long double' floating-point type and
2359 all functions also exist in a reentrant form.
2361 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2362 functions for maintaining the login-record files (primarily of use to
2363 system programs such as `login'), and convenient functions for
2364 allocating and initializing a pseudo-terminal (pty) device.
2366 * Ulrich Drepper has contributed new support for System V style
2367 shared memory and IPC on systems that support it.
2369 * Ulrich Drepper has contributed several miscellaneous new functions found
2370 in System V: The `hsearch' family of functions provide an effective
2371 implementation of hash tables; `a64l' and `l64a' provide a very simple
2372 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2375 * Ulrich Drepper has contributed new reentrant counterparts for the
2376 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2378 * Ulrich Drepper has contributed new, highly-optimized versions of several
2379 string functions for the i486/Pentium family of processors.
2381 * Ulrich Drepper has updated the Linux-specific code, based largely
2382 on work done in Hongjiu Lu's version of GNU libc for Linux.
2383 The GNU library now supports Linux versions 2.0.10 and later,
2384 using the ELF object file format (i[3456]86-*-linux).
2386 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2388 * David Mosberger-Tang and Richard Henderson have ported the C library
2389 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2390 dynamic linking support for ELF/Alpha.
2392 * Richard Henderson contributed several Alpha optimized assembler function
2393 for arithmetic and string handling.
2395 * Ulrich Drepper has contributed a new set of message catalog functions to
2396 support multiple languages using the <libintl.h> interface, for use with
2397 his new package GNU gettext. Translation volunteers have contributed
2398 catalogs of the library's messages in Spanish, German, and Korean.
2400 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2401 program and the `catgets' function for reading the catalog files it
2402 creates. (The <libintl.h> interface is preferred; we include the
2403 <nl_types.h> interface using `catgets' only for source compatibility with
2404 programs already written to use it.)
2406 * New header file <values.h> gives SVID-compatible names for <limits.h>
2409 * Various new macros, declarations, and small header files for compatibility
2412 * New function `group_member' is a convenient way to check if a process has
2413 a given effective group ID.
2415 * When using GCC 2.7 and later, the socket functions are now declared in a
2416 special way so that passing an argument of type `struct sockaddr_in *',
2417 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2418 `struct sockaddr *' type, does not generate a type-clash warning.
2420 * New function `error' declared in header file <error.h> is a convenient
2421 function for printing error messages and optionally exiting; this is the
2422 canonical function used in GNU programs. The new functions `err', `warn',
2423 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2424 doing the same thing.
2426 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2427 POSIX.2 `glob' function to do ~ and {...} expansion.
2429 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2430 `clearenv' which is used in POSIX.9 is also available.
2432 * New function `getsid' returns session ID number on systems that support it.
2434 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2435 files <db.h> and <mpool.h> provide a rich set of functions for several
2436 types of simple databases stored in memory and in files, and <ndbm.h> is
2437 an old `ndbm'-compatible interface using the `db' functions. Link with
2438 `-ldb' to get these functions.
2440 * New macro `strdupa' copies a string like `strdup', but uses local stack
2441 space from `alloca' instead of dynamic heap space from `malloc'.
2443 * New function `strnlen' is like `strlen' but searches only a given maximum
2444 number of characters for the null terminator. `stpncpy', `strndup' and
2445 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2448 * New function `statfs' in header <sys/statfs.h>.
2450 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2451 provide convenient functions for operating on blocks of null-terminated
2454 * A new suite of functions in <utmp.h> handle all the details of reading
2455 and writing the utmp file.
2457 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2460 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2461 completely POSIX compliant and also implemented the extended functionality
2462 to handle alternate digit representation and alternate era date formats.
2464 * Ulrich Drepper provided an implementation of the `strptime' function
2465 defined in XPG4.2 which transforms a string into a `struct tm' value.
2467 * Paul Eggert provided the tzselect shell script as part of the timezone
2468 code. The shell script makes it easy to select the correct timezone
2471 * The implementation of the malloc family of functions is completely replaced
2472 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2473 The implementation uses the mmap function (if available) and it is
2474 optimized for the use in multi threaded programs.
2476 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2477 functions. This new functionality is usable by specifying a special
2478 salt string and it is compatible with implementation on *BSD systems.
2480 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2481 `getsubopt' to handle second level command line options, `bsd_signal'
2482 to access BSD style `signal' functionality, the obsolete `regexp' style
2485 * the `lchown' function is available on system which support this
2488 * The implementation of the shadow password handling function was contributed
2491 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2493 * POSIX.1g support was added. The <sys/select.h> header is available,
2494 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2495 implementation of `getaddrinfo'.
2499 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2501 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2502 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2504 * The new function `daemon' from 4.4 BSD is useful for server programs that
2505 want to put themselves in the background.
2507 * Joel Sherrill has contributed support for several standalone boards that
2508 run without an operating system.
2510 * `printf', `scanf' and friends now accept a `q' type modifier for long
2511 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2513 * All of the code taken from BSD (notably most of the math and networking
2514 routines) has been updated from the BSD 4.4-Lite release.
2516 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2518 * The new functions `getdomainname' and `setdomainname' fetch or change the
2519 YP/NIS domain name. These are system calls which exist on systems which
2522 * The time zone data files have been updated for the latest international
2525 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2526 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2530 * The C library now includes support for Sun RPC, from Sun's free
2531 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2532 are included. (There is still no support for YP.)
2534 * Tom Quinn has contributed a port of the C library to SGI machines running
2535 Irix 4 (mips-sgi-irix4).
2537 * The new `lockf' function is a simplified interface to the locking
2538 facilities of `fcntl', included for compatibility.
2540 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2542 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2544 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2547 * The error message printed by `assert' for a failed assertion now includes
2548 the name of the program (if using GNU ld) and the name of the calling
2549 function (with versions of GCC that support this).
2551 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2553 * The library now includes the <sys/mman.h> header file and memory
2554 management functions `mmap', `munmap', `mprotect', `msync', and
2555 `madvise', on systems that support those facilities.
2557 * The interface for `mcheck' has changed slightly: the function called to
2558 abort the program when an allocation inconsistency is detected now takes
2559 an argument that indicates the type of failure. The new function
2560 `mprobe' lets you request a consistency check for a particular block at
2561 any time (checks are normally done only when you call `free' or `realloc'
2564 * It is now possible to easily cross-compile the C library, building on one
2565 system a library to run on another machine and/or operating system. All
2566 you need to do is set the variable `HOST_CC' in `configparms' to the
2567 native compiler for programs to run on the machine you are building on (a
2568 few generator programs are used on Unix systems); set `CC' to the
2571 * The new function `fexecve' (only implemented on the GNU system) executes
2572 a program file given a file descriptor already open on the file.
2576 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2577 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2579 * You can set the variable `libprefix' in `configparms' to specify a prefix
2580 to be prepended to installed library files; this makes it easy to install
2581 the GNU C library to be linked as `-lgnuc' or whatever.
2583 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2584 copies a limited number of characters from a string, and returns the
2585 address of the last character written.
2587 * You no longer need to check for whether the installed `stddef.h' is
2588 compatible with the GNU C library. configure now checks for you.
2590 * You can now define a per-stream `fileno' function to convert the
2591 stream's cookie into an integral file descriptor.
2593 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2594 allocates zero bytes of storage, and returns a unique pointer which
2595 you can pass to `realloc' or `free'. The behavior is undefined if
2596 you dereference this pointer.
2598 * The C library now runs on Sony NEWS m68k machines running either
2599 NewsOS 3 or NewsOS 4.
2601 * The new `syscall' function is a system-dependent primitive function
2602 for invoking system calls. It has the canonical behavior on Unix
2603 systems, including unreliable return values for some calls (such as
2604 `pipe', `fork' and `getppid').
2606 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2607 to `EAGAIN', which is the preferred name. On systems whose kernels
2608 use two distinct codes, the C library now translates EWOULDBLOCK to
2609 EAGAIN in every system call function.
2613 * The GNU C Library Reference Manual is now distributed with the library.
2614 `make dvi' will produce a DVI file of the printed manual.
2615 `make info' will produce Info files that you can read on line using C-h i
2616 in Emacs or the `info' program.
2617 Please send comments on the manual to bug-glibc-manual@gnu.org.
2619 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2621 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2623 * Jason Merrill has contributed a port to the Sequent Symmetry running
2624 Dynix version 3 (i386-sequent-dynix).
2626 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2627 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2629 * New function `memory_warnings' lets you arrange to get warnings when
2630 malloc is running out of memory to allocate, like Emacs gives you.
2632 * The C library now contains the relocating allocator used in Emacs 19 for
2633 its editing buffers. This allocator (ralloc) minimizes allocation
2634 overhead and fragmentation by moving allocated regions around whenever it
2635 needs to. You always refer to a ralloc'd region with a "handle" (a
2636 pointer to a pointer--an object of type `void **').
2638 * There is a new `printf' format: `%m' gives you the string corresponding
2639 to the error code in `errno'.
2641 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2642 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2643 pass, the `a' modifier says to fill in a `char **' you pass with a
2646 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2647 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2648 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2650 * `mkstemp' is a traditional Unix function to atomically create and open a
2651 uniquely-named temporary file.
2655 * The standard location for the file that says what the local timezone is
2656 has changed again. It is now `/usr/local/etc/localtime' (or more
2657 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2659 * The distribution no longer contains any files with names longer than 14
2662 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2663 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2665 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2669 * The configuration process has changed quite a bit. The `configure'
2670 script is now used just like the configuration scripts for other GNU
2671 packages. The `sysdeps' directory hierarchy is much rearranged.
2672 The file `INSTALL' explains the new scheme in detail.
2674 * The header files no longer need to be processed into ANSI C and
2675 traditional C versions. There is just one set of files to install, and
2676 it will work with ANSI or old C compilers (including `gcc -traditional').
2678 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2679 MIPS DECStation running Ultrix 4.
2681 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2682 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2683 made itself into a shared library.
2685 * Yet further improved support for the i386, running 4.3 BSD-like systems
2686 (such as Mach 3 with the Unix single-server), or System V.
2688 * New function `strncasecmp' to do case-insensitive string comparison
2689 with limited length.
2691 * New function `strsep' is a reentrant alternative to `strtok'.
2693 * New functions `scandir' and `alphasort' for searching directories.
2695 * New function `setenv' is a better interface to `putenv'.
2697 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2698 function for traversing a directory tree.
2700 * The GNU obstack package is now also part of the C library.
2701 The new function `open_obstack_stream' creates a stdio stream that
2702 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2703 formatted output directly to an obstack.
2705 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2706 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2708 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2710 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2711 things to your strings.
2713 * There are some new test programs: test-fseek, testmb, and testrand.
2715 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2716 These ports are not finished, but are a good starting place for really
2717 supporting those systems.
2719 * `/etc/localtime' is now the standard location for the file that says what
2720 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2721 This follows the general principle that `/etc' is the place for all local
2722 configuration files.
2724 * The C library header files now use `extern "C"' when used by the C++
2725 compiler, so the C library should now work with C++ code.
2727 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2728 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2731 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2732 function which uses the `merge sort' algorithm, and is said to be
2733 significantly faster than the old GNU `qsort' function. Merge sort is
2734 now the standard `qsort' function. The new algorithm can require a lot
2735 of temporary storage; so, the old sorting function is called when the
2736 required storage is not available.
2738 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2739 provides the Unix `crypt' function, plus some other entry points.
2741 * The code and header files taken from 4.4 BSD have been updated with the
2742 latest files released from Berkeley.
2744 ----------------------------------------------------------------------
2745 Copyright information:
2747 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2749 Permission is granted to anyone to make or distribute verbatim copies
2750 of this document as received, in any medium, provided that the
2751 copyright notice and this permission notice are preserved,
2752 thus giving the recipient permission to redistribute in turn.
2754 Permission is granted to distribute modified versions
2755 of this document, or of portions of it,
2756 under the above conditions, provided also that they
2757 carry prominent notices stating who last changed them.
2760 version-control: never