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 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
11 kernel-internal CPU set size. This means that requests that change the
12 CPU affinity which failed before (for example, an all-ones CPU mask) will
13 now succeed. Applications that need to determine the effective CPU
14 affinities need to call sched_getaffinity or pthread_getaffinity_np after
15 setting it because the kernel can adjust it (and the previous size check
16 would not detect this in the majority of cases).
18 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
19 the following new symbols are used: fts64_children, fts64_close,
20 fts64_open, fts64_read and fts64_set.
22 * getaddrinfo now detects certain invalid responses on an internal netlink
23 socket. If such responses are received, an affected process will
24 terminate with an error message of "Unexpected error <number> on netlink
25 descriptor <number>" or "Unexpected netlink response of size <number> on
26 descriptor <number>". The most likely cause for these errors is a
27 multi-threaded application which erroneously closes and reuses the netlink
28 file descriptor while it is used by getaddrinfo.
30 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
31 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
32 unnecessary serialization of memory allocation requests across threads.
33 The defect is now corrected. Users should see a substantial increase in
34 the concurent throughput of allocation requests for applications which
35 trigger this bug. Affected applications typically create create and
36 destroy threads frequently. (Bug 19048 was reported and analyzed by
39 * There is now a --disable-timezone-tools configure option for disabling the
40 building and installing of the timezone related utilities (zic, zdump, and
41 tzselect). This is useful for people who build the timezone data and code
42 independent of the GNU C Library.
44 * The LD_POINTER_GUARD environment variable can no longer be used to
45 disable the pointer guard feature. It is always enabled.
47 * The obsolete header <regexp.h> has been removed. Programs that require
48 this header must be updated to use <regex.h> instead.
50 * Optimized string, wcsmbs and memory functions for IBM z13.
51 Implemented by Stefan Liebler.
53 * Newly linked programs that define a variable called signgam will no longer
54 have it set by the lgamma, lgammaf and lgammal functions. Programs that
55 require signgam to be set by those functions must ensure that they use the
56 variable provided by the GNU C Library and declared in <math.h>, without
57 defining their own copy.
59 * The minimum GCC version that can be used to build this version of the GNU
60 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
61 still be used to compile programs using the GNU C Library.
63 * The following bugs are resolved with this release:
65 [The release manager will add the list generated by
66 scripts/list-fixed-bugs.py just before the release.]
70 * The following bugs are resolved with this release:
72 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
73 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
74 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
75 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
76 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
77 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
78 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
79 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
80 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
81 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
82 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
83 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
84 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
85 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
86 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
87 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
88 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
89 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
90 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
91 18657, 18676, 18694, 18696, 18887.
93 * Cache information can be queried via sysconf() function on s390 e.g. with
94 _SC_LEVEL1_ICACHE_SIZE as argument.
96 * A buffer overflow in gethostbyname_r and related functions performing DNS
97 requests has been fixed. If the NSS functions were called with a
98 misaligned buffer, the buffer length change due to pointer alignment was
99 not taken into account. This could result in application crashes or,
100 potentially arbitrary code execution, using crafted, but syntactically
101 valid DNS responses. (CVE-2015-1781)
103 * The time zone file parser has been made more robust against crafted time
104 zone files, avoiding heap buffer overflows related to the processing of
105 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
106 large time zone data files. Overly long time zone specifiers in the TZ
107 variable no longer result in stack overflows and crashes.
109 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
110 for LD and GD on x86 and x86-64, has been implemented. You will need
111 binutils-2.24 or later to enable this optimization.
113 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
114 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
115 Hat). These updates cause user visible changes, such as the fix for bug
118 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
119 and getXXbyYY NSS calls for the same database, causing a denial-of-service
120 condition in some applications.
122 * Added vector math library named libmvec with the following vectorized x86_64
123 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
125 The library can be disabled with --disable-mathvec. Use of the functions is
126 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
127 Shared library libmvec.so is linked in as needed when using -lm (no need to
128 specify -lmvec explicitly for not static builds).
129 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
131 * A new fmemopen implementation has been added with the goal of POSIX
132 compliance. The new implementation fixes the following long-standing
133 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
134 old implementation is still present for use be by existing binaries.
136 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
137 releases. It has been fixed to match 2.19 and older, but binaries built
138 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
140 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
141 Contributed by Roland McGrath (Google).
143 * The header <regexp.h> is deprecated, and will be removed in a future
144 release. Use of this header will trigger a deprecation warning.
145 Application developers should update their code to use <regex.h> instead.
147 This header was formerly part of SUS, but was deprecated in 1994 and
148 removed from the standard in 2001. Also, the glibc implementation
149 leaks memory. See BZ#18681 for more details.
153 * The following bugs are resolved with this release:
155 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
156 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
157 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
158 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
159 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
160 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
161 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
162 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
163 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
164 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
167 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
168 too little memory for the to-be-scanned arguments and overflow the
169 allocated buffer. The implementation now correctly computes the required
170 buffer size when using malloc, and switches to malloc from alloca as
173 * A new semaphore algorithm has been implemented in generic C code for all
174 machines. Previous custom assembly implementations of semaphore were
175 difficult to reason about or ensure that they were safe. The new version
176 of semaphore supports machines with 64-bit or 32-bit atomic operations.
177 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
178 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
180 * Port to Altera Nios II has been contributed by Mentor Graphics.
182 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
183 implementations for powerpc64/powerpc64le.
184 Implemented by Adhemerval Zanella (IBM).
186 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
187 and powerpc64le. This may improve lock scaling of existing programs on
188 HTM capable systems. The lock elision code is only enabled with
189 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
190 powerpc will issue a transaction abort on every syscall to avoid side
191 effects being visible outside transactions.
193 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
194 AArch64. Contributed by ARM Ltd.
196 * i386 memcpy functions optimized with SSE2 unaligned load/store.
198 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
199 under certain input conditions resulting in the execution of a shell for
200 command substitution when the application did not request it. The
201 implementation now checks WRDE_NOCMD immediately before executing the
202 shell and returns the error WRDE_CMDSUB as expected.
204 * CVE-2012-3406 printf-style functions could run into a stack overflow when
205 processing format strings with a large number of format specifiers.
207 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
208 infinite loop if the DNS response contained a PTR record of an unexpected
211 * The minimum GCC version that can be used to build this version of the GNU
212 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
213 still be used to compile programs using the GNU C Library.
215 * The GNU C Library is now built with -Werror by default. This can be
216 disabled by configuring with --disable-werror.
218 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
220 * The obsolete sigvec function has been removed. This was the original
221 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
222 programs have been using instead for about 25 years. Of course, ABI
223 compatibility for old binaries using sigvec remains intact.
225 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
226 with newer versions of bison.
228 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
229 The original MIPS o32 hard-float ABI requires an FPU where double-precision
230 registers overlay two consecutive single-precision registers. MIPS32R2
231 introduced a new FPU mode (FR=1) where double-precision registers extend the
232 corresponding single-precision registers which is incompatible with the
233 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
234 require the use of FR=1 making a transition necessary. New o32 ABI
235 extensions enable users to migrate over time from the original o32 ABI
236 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
237 tracks the ABI of any loaded object and verifies that new objects are
238 compatible. Mode transitions will also be requested as required and
239 unsupportable objects will be rejected. The ABI checks include both soft and
240 hard float ABIs for o32, n32 and n64.
242 GCC 5 with GNU binutils 2.25 onwards:
243 It is strongly recommended that all o32 system libraries are built using the
244 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
245 with the original and all new o32 ABI extensions. Configure a MIPS GCC
246 compiler using --with-fp-32=xx to set this by default.
250 * The following bugs are resolved with this release:
252 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
253 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
254 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
255 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
256 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
257 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
258 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
259 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
260 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
261 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
262 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
263 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
264 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
265 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
266 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
268 * Reverted change of ABI data structures for s390 and s390x:
269 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
270 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
271 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
272 are preserved pointing straight to the same implementation as the old ones.
273 Given that, new callers will simply provide a too-big buffer to these
274 functions. Any applications/libraries out there that embed jmp_buf or
275 ucontext_t in an ABI-relevant data structure that have already been rebuilt
276 against 2.19 headers will have to rebuilt again. This is necessary in any
277 case to revert the breakage in their ABI caused by the glibc change.
279 * Support for file description locks is added to systems running the
280 Linux kernel. The standard file locking interfaces are extended to
281 operate on file descriptions, not file descriptors, via the use of
282 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
283 are associated with an open file instead of a process.
285 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
287 * The minimum Linux kernel version that this version of the GNU C Library
288 can be used with is 2.6.32.
290 * Running the testsuite no longer terminates as soon as a test fails.
291 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
292 with PASS or FAIL lines for individual tests. A summary of the results is
293 printed, including a list of failing lists, and "make check" exits with
294 error status if there were any unexpected failures. "make check
295 stop-on-test-failure=y" may be used to keep the old behavior.
297 * The am33 port, which had not worked for several years, has been removed
300 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
301 supported; they now act the same as _DEFAULT_SOURCE (but generate a
302 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
303 conflicted with POSIX (support for which was removed in 2.19), the
304 interfaces those macros enabled remain available when compiling with
305 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
308 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
310 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
311 This may improve lock scaling of existing programs on TX capable systems.
312 The lock elision code is only built with --enable-lock-elision=yes and
313 then requires a GCC version supporting the TX builtins. With lock elision
314 default mutexes are elided via __builtin_tbegin, if the cpu supports
315 transactions. By default lock elision is not enabled and the elision code
318 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
319 copy the path argument. This allowed programs to cause posix_spawn to
320 deference a dangling pointer, or use an unexpected pathname argument if
321 the string was modified after the posix_spawn_file_actions_addopen
324 * All supported architectures now use the main glibc sysdeps directory
325 instead of some being in a separate "ports" directory (which was
326 distributed separately before glibc 2.17).
328 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
329 On configurations that support it (all Linux configurations), it's now
330 used regardless of the --enable-add-ons switch to configure. It is no
331 longer possible to build such configurations without pthreads support.
333 * Locale names, including those obtained from environment variables (LANG
334 and the LC_* variables), are more tightly checked for proper syntax.
335 setlocale will now fail (with EINVAL) for locale names that are overly
336 long, contain slashes without starting with a slash, or contain ".." path
337 components. (CVE-2014-0475) Previously, some valid locale names were
338 silently replaced with the "C" locale when running in AT_SECURE mode
339 (e.g., in a SUID program). This is no longer necessary because of the
342 * On x86-64, the dynamic linker's lazy-binding support is now compatible
343 with application code using Intel MPX instructions. (With all previous
344 versions, the MPX register state could be clobbered when making calls
345 into or out of a shared library.) Note that while the new dynamic
346 linker is compatible with all known x86 hardware whether or not it
347 supports Intel MPX, some x86 instruction-set emulators might fail to
348 handle the new instruction encodings. This is known to affect Valgrind
349 versions up through 3.9 (but will be fixed in the forthcoming 3.10
350 release), and might affect other tools that do instruction emulation.
352 * Support for loadable gconv transliteration modules has been removed.
353 The support for transliteration modules has been non-functional for
354 over a decade, and the removal is prompted by security defects. The
355 normal gconv conversion modules are still supported. Transliteration
356 with //TRANSLIT is still possible, and the //IGNORE specifier
357 continues to be supported. (CVE-2014-5119)
359 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
360 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
361 resulting a denial-of-service security vulnerability in applications which
362 use functions related to iconv. (CVE-2014-6040)
366 * The following bugs are resolved with this release:
368 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
369 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
370 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
371 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
372 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
373 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
374 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
375 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
376 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
377 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
378 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
379 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
380 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
381 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
382 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
383 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
384 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
385 16431, 16453, 16474, 16506, 16510, 16529
387 * Slovenian translations for glibc messages have been contributed by the
388 Translation Project's Slovenian team of translators.
390 * The public headers no longer use __unused nor __block. This change is to
391 support compiling programs that are derived from BSD sources and use
392 __unused internally, and to support compiling with Clang's -fblock
393 extension which uses __block.
395 * CVE-2012-4412 The strcoll implementation caches indices and rules for
396 large collation sequences to optimize multiple passes. This cache
397 computation may overflow for large collation sequences and may cause a
398 stack or buffer overflow. This is now fixed to use a slower algorithm
399 which does not use a cache if there is an integer overflow.
401 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
402 rules for large collation sequences to optimize multiple passes and falls
403 back to alloca if malloc fails, resulting in a possible stack overflow.
404 The implementation now falls back to an uncached collation sequence lookup
407 * CVE-2013-4788 The pointer guard used for pointer mangling was not
408 initialized for static applications resulting in the security feature
409 being disabled. The pointer guard is now correctly initialized to a
410 random value for static applications. Existing static applications need
411 to be recompiled to take advantage of the fix (bug 15754).
413 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
414 to the d_name member of struct dirent, or omit the terminating NUL
415 character. (Bugzilla #14699).
417 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
418 aligned_alloc functions could allocate too few bytes or corrupt the
419 heap when passed very large allocation size values (Bugzilla #15855,
422 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
423 for AF_INET6 has been fixed (Bugzilla #16072).
425 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
426 pap_CW, quz_PE, the_NP.
428 * Substantially revised locales: gd_GB, ht_HT
430 * The LC_ADDRESS field was updated to support country_car for almost all
433 * ISO 1427 definitions were updated.
435 * ISO 3166 definitions were updated.
437 * The localedef utility now supports --big-endian and --little-endian
438 command-line options to generate locales for a different system from that
439 for which the C library was built.
441 * Binary locale files now only depend on the endianness of the system for
442 which they are generated and not on other properties of that system. As a
443 consequence, binary files generated with new localedef may be incompatible
444 with old versions of the GNU C Library, and binary files generated with
445 old localedef may be incompatible with this version of the GNU C Library,
446 in the following circumstances:
448 + Locale files may be incompatible on m68k systems.
450 + Locale archive files (but not separate files for individual locales) may
451 be incompatible on systems where plain "char" is signed.
453 * The configure option --disable-versioning has been removed. Builds with
454 --disable-versioning had not worked for several years.
456 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
457 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
459 * SystemTap probes for malloc have been introduced.
461 * SystemTap probes for slow multiple precision fallback paths of
462 transcendental functions have been introduced.
464 * Support for powerpc64le has been added.
466 * The soft-float powerpc port now supports e500 processors.
468 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
470 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
471 set of header declarations that are enabled by default, even when other
472 feature test macros or compiler options such as -std=c99 would otherwise
473 disable some of those declarations.
475 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
476 conflict with POSIX. The libbsd-compat library (which was a dummy library
477 that did nothing) has also been removed.
479 * Preliminary documentation about Multi-Thread, Async-Signal and
480 Async-Cancel Safety has been added.
482 * Change of ABI data structures for s390 and s390x:
483 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
484 allow for future hardware extensions. All library functions that accept or
485 return these structures were versioned in order to provide backwards
486 compatibility with existing code. However, not all cases can be handled
487 with interface versioning. If an application embeds either structure into
488 another structure and that structure is passed to another compilation unit
489 which expects the newer larger-sized object then any access to the new
490 fields will result in undefined behaviour. Similarly any access to fields
491 that were moved by the enlarging of the structures will cause undefined
492 behaviour. To fix the undefined behaviour all objects that are part of the
493 final in-memory image must agree on the size of structures, and this may
494 require recompilation.
498 * The following bugs are resolved with this release:
500 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
501 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
502 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
503 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
504 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
505 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
506 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
507 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
508 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
509 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
510 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
511 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
512 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
515 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
516 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
517 Distributions can re-enable building and using pt_chown via the new configure
518 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
519 considerable security risks and should only be used if the distribution
520 understands and accepts the risks.
522 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
525 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
526 fixed (Bugzilla #15330).
528 * Add support for calling C++11 thread_local object destructors on thread
529 and program exit. This needs compiler support for offloading C++11
530 destructor calls to glibc.
532 * Improved worst case performance of libm functions with double inputs and
535 * Support for priority inherited mutexes in pthread condition variables on
536 non-x86 architectures.
538 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
540 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
542 * Optimized string functions for ARM. Implemented by Will Newton and
545 * Optimized libm functions for SPARC. Implemented by David S. Miller.
547 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
550 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
551 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
553 * Added a benchmark framework to track performance of functions in glibc.
555 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
556 It is based on draft TS 18661 and currently enabled as a GNU extension.
558 * On Linux, the clock function now uses the clock_gettime system call
559 for improved precision, rather than old times system call.
561 * Added support for version-3 tz format files. This is needed when using
562 the tz database release 2013e or later, and affects a few unusual cases --
563 currently only TZ='America/Godthab' for time stamps after 2037.
565 * Added new API functions pthread_getattr_default_np and
566 pthread_setattr_default_np to get and set the default pthread
567 attributes of a process.
569 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
570 This may improve lock scaling of existing programs on TSX capable systems.
571 When the --enable-lock-elision=yes parameter is specified at configure
572 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
575 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
576 availability). Implemented by Ryan S. Arnold.
578 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
582 * The following bugs are resolved with this release:
584 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
585 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
586 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
587 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
588 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
589 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
590 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
591 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
592 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
593 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
594 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
595 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
596 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
597 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
598 14879, 14889, 14893, 14898, 14914.
600 * Optimization of memcpy for MIPS.
602 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
603 EMFILE has been fixed (Bugzilla #14889).
605 * The add-on ports collection is now distributed in the "ports" subdirectory
606 of the main GNU C Library distribution, rather than separately.
608 * Port to ARM AArch64 contributed by Linaro.
610 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
611 Optimized versions of memcpy, memset, and memcmp added for System z10 and
613 Implemented by Andreas Krebbel.
615 * The new function secure_getenv allows secure access to the environment,
616 returning NULL if running in a SUID/SGID process. This function replaces
617 the internal function __secure_getenv.
619 * SystemTap static probes have been added into the dynamic linker.
620 Implemented by Gary Benson.
622 * Optimizations of string functions strstr, strcasestr and memmem.
623 Implemented by Maxim Kuvyrkov.
625 * The minimum Linux kernel version that this version of the GNU C Library
626 can be used with is 2.6.16.
628 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
629 powerpc POWER7. Implemented by Will Schmidt.
631 * New configure option --disable-nscd builds the C library such that it
632 never attempts to contact the Name Service Caching Daemon (nscd).
633 New configure option --disable-build-nscd avoids building nscd itself;
634 this is the default if --disable-nscd is used.
636 * Improved support for cross-compilation, including cross-testing and
637 bootstrap builds without a previously built glibc.
639 * Several testsuite tests are now able to test multiple IFUNC variants of an
640 interface, rather than just testing the one that would be chooen by
643 * New configure options --with-bugurl and --with-pkgversion, for
644 distributors to use to embed their bug-reporting and package version
645 information in --help and --version output.
647 * The ttyname and ttyname_r functions on Linux now fall back to searching for
648 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
649 allows creation of chroots without the procfs mounted on /proc.
651 * The `crypt' function now fails if passed salt bytes that violate the
652 specification for those values. On Linux, the `crypt' function will
653 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
654 enabled, and fail on encrypted strings using the MD5 or DES algorithm
655 when the mode is enabled.
657 * The `clock_*' suite of functions (declared in <time.h>) is now available
658 directly in the main C library. Previously it was necessary to link with
659 -lrt to use these functions. This change has the effect that a
660 single-threaded program that uses a function such as `clock_gettime' (and
661 is not linked with -lrt) will no longer implicitly load the pthreads
662 library at runtime and so will not suffer the overheads associated with
663 multi-thread support in other code such as the C++ runtime library.
665 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
670 * The following bugs are resolved with this release:
672 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
673 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
674 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
675 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
676 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
677 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
678 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
679 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
680 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
681 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
682 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
683 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
684 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
685 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
686 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
687 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
688 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
689 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
690 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
691 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
692 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
693 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
696 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
697 configuring glibc with:
698 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
699 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
700 Implemented by H.J. Lu.
704 + define static_assert
706 + do not declare gets
708 + declare at_quick_exit and quick_exit also for ISO C11
710 + aligned_alloc. NB: The code is deliberately allows the size parameter
711 to not be a multiple of the alignment. This is a moronic requirement
712 in the standard but it is only a requirement on the caller, not the
717 + uchar.h support added
719 + CMPLX, CMPLXF, CMPLXL added
721 Implemented by Ulrich Drepper.
723 * Support for the IA-64 has been moved to ports.
725 * Remove support for anything but ELF binary format
727 * Checking versions of poll, ppoll added.
728 Implemented by Ulrich Drepper.
730 * More generic and 64-bit performance optimizations to math functions.
731 Implemented by Ulrich Drepper.
733 * New configure option --enable-obsolete-rpc makes the deprecated RPC
734 headers and functions available at compile time as they were before
735 version 2.14. This option will be removed at some time in the future
736 after the TI-RPC library becomes fully sufficient for the needs of
737 existing applications.
739 * Compatibility code for Linux kernel versions before 2.4 has been removed.
740 Note that glibc is not expected to work with any Linux kernel version
743 * New header <sys/auxv.h> and function getauxval allowing easy access to
744 the AT_* key-value pairs passed from the Linux kernel. The header also
745 defines the HWCAP_* bits associated with the AT_HWCAP key.
747 * New locales: mag_IN
749 * New configure option --enable-systemtap builds SystemTap static probes
750 into libc for setjmp and longjmp and into libpthread for various operations.
751 So far the setjmp/longjmp probes and some of the libpthread probes are
752 provided only for i*86 and x86_64.
753 Implemented by Roland McGrath and Rayson Ho.
755 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
757 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
760 * More optimized functions for SPARC. Implemented by David S. Miller.
762 * Improved support for cross-compilation, especially bootstrap builds
763 without a previously built glibc.
765 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
766 Chris Metcalf from Tilera.
768 * Support for the old ARM ABI has been removed from ports. Only the EABI is
769 now supported for ARM processors.
771 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
772 as the name of the dynamic linker, to distinguish it from the
773 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
775 * Support for CRIS has been removed from ports.
777 * A new class of installed header has been documented for low-level
778 platform-specific functionality. PowerPC added the first instance with a
779 function to provide time base register access. Contributed by Tulio
780 Magno Quites Machado Filho.
782 * ix86 configurations now install header files that are consistent with
783 what x86-64 configurations install. These same header files can be used
784 for -m32, -m64, or -mx32 builds.
785 Contributed by H.J. Lu.
787 * Math library bug fixes. A thorough audit of all open math library bugs was
788 conducted by Joseph Myers. Significant progress was made on many math
789 library bugs resulting in more accurate exceptions and function results.
790 Many thanks to all those that contributed including Andreas Jaeger for his
791 patch review and work on the x87 trigonometric instruction issues.
793 * Timezone data is no longer installed. Timezone-related binaries and scripts
794 will continue to be installed. Users should obtain their timezone data from
795 their distribution provider or from the tzdata package at
796 <ftp://munnari.oz.au/pub/>.
800 * The following bugs are resolved with this release:
802 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
803 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
804 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
805 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
806 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
807 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
808 13484, 13506, 13515, 13523, 13524, 13538, 13540
810 * New program pldd to list loaded object of a process
811 Implemented by Ulrich Drepper.
813 * Add nss_db support back to glibc. No more dependency on Berkeley db
814 and support for initgroups lookups.
815 Implemented by Ulrich Drepper.
817 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
818 Contributed by HJ Lu.
820 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
821 Contributed by HJ Lu.
823 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
824 on x86-32 and x86-64.
825 Contributed by Liubov Dmitrieva.
827 * Optimized strchr and strrchr for SSE on x86-32.
828 Contributed by Liubov Dmitrieva.
830 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
831 for x86-64 and x86-32.
832 Contributed by Liubov Dmitrieva.
834 * New interfaces: scandirat, scandirat64
835 Implemented by Ulrich Drepper.
837 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
838 Implemented by Ulrich Drepper.
840 * nscd now also caches the netgroup database.
841 Implemented by Ulrich Drepper.
843 * Integrate libm with gcc's -ffinite-math-only option.
844 Implemented by Ulrich Drepper.
846 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
847 to math functions. Implemented by Ulrich Drepper.
849 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
850 Implemented by Ulrich Drepper.
852 * New Linux interfaces: process_vm_readv, process_vm_writev
854 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
855 Implemented by Ulrich Drepper.
857 * Optimized nearbyint and strcasecmp for PPC.
858 Implemented by Adhemerval Zanella.
860 * New locales: bho_IN, unm_US, es_CU, ta_LK
864 * The following bugs are resolved with this release:
866 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
867 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
868 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
869 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
870 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
871 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
872 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
873 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
874 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
875 12795, 12811, 12813, 12814, 12841
877 * The RPC implementation in libc is obsoleted. Old programs keep working
878 but new programs cannot be linked with the routines in libc anymore.
879 Programs in need of RPC functionality must be linked against TI-RPC.
880 The TI-RPC implementation is IPv6 enabled and there are other benefits.
882 Visible changes of this change include (obviously) the inability to link
883 programs using RPC functions without referencing the TI-RPC library and the
884 removal of the RPC headers from the glibc headers.
885 Implemented by Ulrich Drepper.
887 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
888 syncfs, setns, sendmmsg
890 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
891 yue_HK, lij_IT, mhr_RU
893 * New encodings: CP770, CP771, CP772, CP773, CP774
895 * New program sotruss to trace calls through PLTs
896 Implemented by Ulrich Drepper.
898 * The malloc hook implementation is marked deprecated and will be removed
899 from the default implementation in the next version. The design never
900 worked ever since the introduction of threads. Even programs which do
901 not create threads themselves can use multiple threads created internally.
905 * The following bugs are resolved with this release:
907 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
908 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
909 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
910 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
913 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
915 * POWER7 optimizations: memset, memcmp, strncmp
917 * New optimized string functions for x86-64: strnlen (SSE2),
918 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
919 Implemented by Ulrich Drepper.
923 * The following bugs are resolved with this release:
925 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
926 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
927 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
928 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
929 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
930 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
931 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
932 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
934 * New interfaces: pthread_getname_np, pthread_setname_np
936 * New Linux interface: recvmmsg
938 * STT_GNU_IFUNC implemented for Sparc by David Miller.
940 * The dynamic linker now recognizes supported ABI versions from the
941 EI_ABIVERSION field in the ELF header.
942 Implemented by Ulrich Drepper.
944 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
945 will not be used to fill in password fields in the passwd.byname replies.
946 Instead it is used to synthesize the shadow.byname table, should it be
947 missing. This is a useful mode in some installations involving Solaris.
948 Implemented by Ulrich Drepper.
950 * New locales: kok_IN, sq_MK, cv_RU
954 * The following bugs are resolved with this release:
956 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
957 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
958 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
959 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
960 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
961 10789, 10817, 10823, 10840, 10847
963 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
965 Implemented by Ulrich Drepper.
967 * Checking version of longjmp added that fails if an uninitialized stack
968 frame would be created. Implemented by Ulrich Drepper.
970 * STT_GNU_IFUNC is now supported in static executables.
971 Implemented by H.J. Lu.
973 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
975 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
976 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
977 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
978 Contributed by H.J. Lu.
980 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
981 Implemented by Ulrich Drepper.
983 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
985 Contributed by H.J. Lu.
987 * Support for fma instruction in AVX on x86-64.
988 Implemented by H.J. Lu and Ulrich Drepper.
990 * AVX support in x86-64 auditing support in ld.so.
991 Implemented by H.J. Lu.
993 * STB_GNU_UNIQUE support added.
994 Implemented by Ulrich Drepper.
996 * Implement second fallback mode for optimized DNS lookup for even more
997 broken environments. If two requests from the same port are not
998 handled correctly close the socket and open a new one before sending
999 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1000 can be used to select this mode right away, instead of rediscovering the
1001 necessity is every process again.
1002 Implemented by Ulrich Drepper.
1004 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1005 Implemented by Adam Tkac.
1007 * Optimized iconv conversions for S390x.
1008 Implemented by Andreas Krebbel.
1010 * Using condvars with PI mutexes is now more efficient due to kernel
1011 support for requeueing to PI futexes. NPTL support added for x86-64.
1012 Implemented by Ulrich Drepper.
1014 * New locales: ps_AF, my_MM
1018 * The following bugs are resolved with this release:
1020 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1021 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1022 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1023 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1024 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1026 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1027 Implemented by Ulrich Drepper.
1029 * New Linux interfaces: accept4, fallocate, fallocate64.
1030 Implemented by Ulrich Drepper.
1032 * Correct declarations of string function when used in C++ code. This
1033 could lead to compile errors for invalid C++ code.
1035 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1038 * New POSIX 2008 interface: psiginfo
1039 Implemented by Ulrich Drepper.
1041 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1042 Implemented by Ulrich Drepper.
1044 * Support for selecting between multiple function definitions at runtime
1045 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1047 * The libcrypt library can now use the hash function implementations in
1048 NSS. Implemented by Ulrich Drepper.
1050 * The malloc implementation can be compiled to be less memory efficient
1051 but higher performing in multi-threaded programs.
1052 Implemented by Ulrich Drepper.
1054 * New locales: nan_TW@latin, ks_IN
1056 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1057 Implemented by Ulrich Drepper.
1059 * Extended printf hook support. It is possible to use user-defined types
1060 and extend existing format specifiers.
1061 Implemented by Ulrich Drepper.
1063 * Handling for group shadow files has been added.
1064 Implemented by Ulrich Drepper.
1066 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1067 servers (the case, e.g., for some people using the built-in DNS
1068 server in ADSL modems/routers). There is a once-per-process timeout
1069 in case of a broken server. To avoid it, users can run nscd or put
1070 'options single-request' in /etc/resolv.conf.
1071 Implemented by Ulrich Drepper.
1075 * The following bugs are resolved with this release:
1077 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1078 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1079 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1080 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1081 6968, 6974, 6980, 6995, 7008, 7009, 7029
1083 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1084 up at the same time. Implemented by Ulrich Drepper.
1086 * TLS descriptors for LD and GD on x86 and x86-64.
1087 Implemented by Alexandre Oliva.
1089 * getaddrinfo now handles DCCP and UDPlite.
1090 Implemented by Ulrich Drepper.
1092 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1093 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1094 Implemented by Ulrich Drepper.
1096 * New implementation of memmem, strstr, and strcasestr which is O(n).
1097 Implemented by Eric Blake.
1099 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1101 * Implement "e" option for popen to open file descriptor with the
1102 close-on-exec flag set. Implemented by Ulrich Drepper.
1104 * Implement "b" mode for fmemopen. In this mode writes writes don't
1105 implicitly add a NUL byte and seeks from the end of the buffer really
1106 use the buffer end, not the string length as the basis.
1107 Implemented by Ulrich Drepper.
1109 * Many functions, exported and internal, now atomically set the close-on-exec
1110 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1112 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1114 Implemented by Pravin Satpute.
1116 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1120 * The following bugs are resolved with this release:
1122 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1123 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1124 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1125 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1126 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1127 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1128 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1130 * New locales: bo_CN, bo_IN, shs_CA.
1132 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1134 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1135 Implemented by Pravin Satpute.
1137 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1139 * nscd caches now all timeouts for DNS entries
1140 Implemented by Ulrich Drepper.
1142 * nscd is more efficient and wakes up less often.
1143 Implemented by Ulrich Drepper.
1145 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1146 vdprintf, and obstack_vprintf.
1147 Implemented by Jakub Jelinek.
1149 * Faster memset for x86-64.
1150 Implemented by Harsha Jagasia and H.J. Lu.
1152 * Faster memcpy on x86.
1153 Implemented by Ulrich Drepper.
1155 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1156 Implemented by Ulrich Drepper.
1158 * Faster sqrt and sqrtf implemention for some PPC variants.
1159 Implemented by Steven Munroe.
1163 * The following bugs are resolved with this release:
1165 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1166 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1167 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1168 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1169 5071, 5103, 5104, 5112, 5113, 5184, 5186
1171 * More checking functions: fread, fread_unlocked, open*, mq_open.
1172 Implemented by Jakub Jelinek and Ulrich Drepper.
1174 * Extend fortification to C++. Implemented by Jakub Jelinek.
1176 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1177 by not recognizing 'a' as a modifier when those specs are requested.
1178 Implemented by Jakub Jelinek.
1180 * PPC optimizations to math and string functions.
1181 Implemented by Steven Munroe.
1183 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1184 options to be passed. Implemented by Ulrich Drepper.
1186 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1188 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1189 Implemented by Ulrich Drepper.
1191 * Handle private futexes in the NPTL implementation.
1192 Implemented by Jakub Jelinek and Ulrich Drepper.
1194 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1195 Implemented by Roland McGrath and Ulrich Drepper.
1197 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1199 * SHA-256 and SHA-512 based password encryption.
1200 Implemented by Ulrich Drepper.
1202 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1203 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1206 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1207 Implemented by Ulrich Drepper.
1211 * The following bugs are resolved with this release:
1213 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1214 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1215 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1216 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1217 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1218 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1219 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1222 * New Linux interfaces: epoll_pwait, sched_getcpu.
1224 * New generic interfaces: strerror_l.
1226 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1230 * The following bugs are resolved with this release:
1232 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1233 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1234 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1235 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1236 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1237 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1238 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1239 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1240 3225, 3251, 3252, 3253, 3273
1242 * For Linux, the sorting of addresses returned by getaddrinfo now also
1243 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1244 Implemented by Ulrich Drepper.
1246 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1247 Implemented by Ulrich Drepper.
1249 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1251 * New iconv module for MIK. Contributed by Alexander Shopov.
1253 * For sites with broken group and/or passwd database, the auto-propagate
1254 option of nscd can prevent creating ID lookup entries from the results
1255 of a name lookup and vice versa. This usually is no problem but some
1256 site might have problems with the default behavior.
1257 Implemented by Ulrich Drepper.
1259 * Iterating over entire database in NIS can be slow. With the
1260 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1261 to trade time for memory. The entire database will be read at once.
1262 Implemented by Ulrich Drepper.
1264 * The interfaces introduced in RFC 3542 have been implemented by
1267 * Support for the new ELF hash table format was added by Ulrich Drepper.
1269 * Support for priority inheritance mutexes added by Jakub Jelinek and
1272 * Support for priority protected mutexes added by Jakub Jelinek.
1274 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1275 or_IN, csb_PL, fy_NL, sr_ME.
1279 * More overflow detection functions.
1281 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1282 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1284 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1285 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1286 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1287 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1288 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1289 by Masahide Washizawa.
1291 * It is now possible to install audit libraries for the dynamic linker using
1292 LD_AUDIT. Implemented by Ulrich Drepper.
1294 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1295 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1296 For a libc and libpthread that works well on Linux 2.4 kernels, we
1297 recommend using the stable 2.3 branch.
1299 * The new function open_wmemstream acts like open_memstream,
1300 but uses a wchar_t wide character buffer.
1302 * The new function ppoll is an improved version of poll, similar to pselect.
1304 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1305 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1306 renameat, unlinkat, linkat, symlinkat, readlinkat.
1308 * New Linux kernel system calls: unshare,
1309 inotify_init, inotify_add_watch, inotify_rm_watch.
1311 * The euidaccess function is now also known by the alias eaccess,
1312 for compatibility with some other systems.
1314 * Timezone data updated to 2006b version.
1318 * The following bugs are resolved with this release:
1320 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1321 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1322 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1323 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1324 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1325 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1327 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1329 * As of this release, GCC 4 can be used to compile the C Library.
1331 * Timezone data updated to 2005m version.
1335 * The following bugs are resolved with this release:
1337 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1338 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1339 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1340 777, 787, 821, 822, 823, 825
1342 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1346 * Support for RFC 3678. Real implementations exist only for Linux so far.
1347 Implemented by Ulrich Drepper.
1349 * nscd can now cache entries persistently. Expiring entries are reloaded.
1350 For speedups the cache can be shared in memory with client processes.
1351 Implemented by Ulrich Drepper.
1353 * nscd can now perform SELinux checks.
1354 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1356 * getaddrinfo queries are now cached. Canonical name lookup is performed
1358 Implemented by Ulrich Drepper.
1360 * The nothrow function attribute is used when headers are used by gcc when
1361 compiling C code. This can avoid significant amounts of exception
1364 * The malloc functions perform more error checking and are stricter when
1365 it comes to reacting on errors. The default action is to terminate
1366 the process after showing an error message. Implemented by Ulrich Drepper.
1368 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1369 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1371 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1372 namespaces using the new function dlmopen(). This feature is of course,
1373 like most other dynamic loading functionality, not available in statically
1374 linked applications. Implemented by Ulrich Drepper.
1376 * Low-overhead boundary checking variants of string and some stdio functions
1377 were added. These are to be used in conjunction with a gcc patch by
1378 Jakub Jelinek which adds calls to these functions if possible.
1379 Implemented by Jakub Jelinek and Ulrich Drepper.
1381 * Old code for several operating systems and machine architectures that
1382 have not been in working condition in a long time have been removed from
1383 the main source tree maintained by the GNU C Library's maintainers.
1384 These files are now reside in the separate `ports' source module
1385 that is usable as an add-on when building the library.
1389 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1390 interrogate the dynamic linker, compatible with the Solaris interface.
1392 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1393 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1395 * getifaddrs now uses the netlink interface on Linux to get its information.
1396 Implemented by Thorsten Kukuk.
1398 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1399 Implemented by Ulrich Drepper.
1401 * support for non-executable stacks on x86 has been added. Changes mostly
1404 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1407 * getaddrinfo now performs destination address selection according to
1412 * Thread-safe interfaces for many functions that access locale data
1413 were added in version 2.3, but these features were omitted from NEWS.
1414 Many functions have variants with an `_l' suffix that take a `locale_t'
1415 object as a parameter rather than consulting the current locale.
1416 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1417 create and maintain `locale_t' objects. Additionally, the new function
1418 `uselocale' sets "the current locale" (as used by functions not so
1419 parameterized) set for an individual thread. These features were added
1420 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1422 * The functions getresuid, getresgid, setresuid, and setresgid, which
1423 have long been available on Linux, are now declared in <unistd.h>
1424 and are now also available on the Hurd.
1426 * ELF thread-local storage support (TLS) now works on x86-64.
1428 * The new dynamic string token $LIB is expanded in shared library names.
1429 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1431 * Aldy Hernandez contributed complete software floating point support for
1432 PowerPC machines with no FPU.
1434 * fexecve is implemented on Linux.
1436 * The `btowc' function should work at least twice as fast due to
1437 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1439 * With approriate thread add-ons cancelable functions are now implemented
1440 in libc.so as well. No need to call the function in libpthread. This
1441 change allowed to finally disable the incorrect and expensive handling
1442 of weak definition in ld.so.
1444 * Yet more PLT entries in libc.so have been removed. We finally arrived
1445 at the bare minimum. Startup times improved appropriately.
1447 * Support for the new Linux/x86 system call interface was added. The
1448 AT_SYSINFO auxiliary vector entry is recognized and handled.
1452 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1455 * iconv (the program and the interface) now accepts empty names (excluding
1456 options like //TRANSLIT) to mean "use charset of current locale".
1458 * localedef can now transliterate characters in strings which are not in
1459 the provided charmap. The information from the input locale is used.
1461 * Prelinking support was added for ELF targets. This requires additional
1462 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1464 * Read-only stdio streams now use mmap to speed up operation by eliminating
1465 copying and buffer underflows. To use add 'm' to the mode string of
1466 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1468 * The malloc functions were completely rewritten by Wolfram Gloger based
1469 on Doug Lea's malloc-2.7.0.c.
1471 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1472 implementation of regex.
1474 * Bruno Haible upgraded the iconv and locale implementation to support
1477 * Contents of the LC_* and LANG environment variables in the CEN style are
1478 not recognized anymore. It never was used. Change by Ulrich Drepper.
1480 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1481 thread-local storage (TLS) ABI on some platforms.
1482 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1484 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1485 EUC-JISX0213, and TSCII.
1487 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1488 BSD-compatible interface for getting all network interface addresses.
1489 Implementation for IPv4 by Roland McGrath.
1491 * Loading of locale data is faster due to the introduction of a locale
1492 archive. Implemented by Roland McGrath and Ulrich Drepper.
1494 * Startup times are significantly reduced by not using exported functions
1495 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1498 * Steven Munroe contributed a port to PowerPC64/Linux.
1502 * The Hurd now uses the GNU libio implementation of stdio rather than the
1503 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1505 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1506 with the same behavior as the Linux system call of the same name.
1510 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1511 128-bit long double format.
1513 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1514 IBM1161, and IBM1162 charsets.
1516 * Andreas Jaeger contributed a port to x86-64/Linux.
1518 * Peter Bruin contributed a port to PowerPC/Hurd.
1520 * libc functions using I/O streams now can handle wide-oriented streams
1523 * optimizations in the dynamic linker. Binaries created by recent binutils
1524 versions start up quicker due to reduced time spent on relocations.
1526 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1530 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1531 asinh, atanh, j0 for the 128-bit long double format.
1533 * Bruno Haible updated all the code handling Unicode in some form to
1534 support Unicode 3.1.
1536 * Speed of regex for single-byte locales is back to previous levels.
1537 Patch by Isamu Hasegawa.
1539 * Alpha, SPARC, and IA-64 now also using floating stacks.
1541 * Startup time of internationalized applications greatly improved through
1542 iconv cache. Use iconvconfig to generate the cache file.
1543 Contributed by Ulrich Drepper.
1545 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1546 severe performance problems. Patch by David Mosberger.
1548 * The Hurd port got a lot more functionality like AIO, various stdio
1549 extensions, etc. Mainly done by Roland McGrath.
1551 * mtrace can now lookup symbols in shared libraries.
1555 * Intel's IA-64 math library is largely integrated. It provides fast and
1556 accurate implementatations for most basic and standard math functions
1557 in float, double, and long double format.
1559 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1560 and asin for the 96-bit long double format and asin, log, tan for the
1561 128-bit long double format.
1563 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1564 The basic double functions exist today. Contributed by Abraham Ziv
1565 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1566 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1568 * An asynchronous name lookup library was added. The interface is designed
1569 after POSIX AIO. The proposal was circulated beforehand to get comments.
1570 No negative ones came in. Implemented by Ulrich Drepper.
1572 * Port to S390/64bit contributed by Martin Schwidefsky
1573 <schwidefsky@de.ibm.com>.
1575 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1576 of functions for Linux/IA-64.
1578 * The RPC code is now thread safe. Threads can now use the same service
1579 of different services at the same time. Patch by Eric Norum
1580 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1582 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1583 family of functions for Linux/S390.
1585 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1586 of functions for Linux/x86.
1588 * Port to Linux/CRIS contributed by Axis Communications.
1592 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1593 we can now check for namespace violations and missing declarations. The
1594 result is that almost all headers are now Unix-compliant (as defined in
1595 the upcoming XPG6). The negative side is that some programs might need
1596 corrections, too, if they depend on the incorrect form of the headers in
1597 previous versions which defined too many symbols and included too many
1600 * regex now handles multibyte character sets correctly.
1601 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1603 * iconv (the program) does now conform to the upcoming XPG6 and handles
1604 charmaps. Instead of the charset names the path of charmaps can be
1605 provided and the conversion happens based on this data.
1606 Contributed by Ulrich Drepper.
1608 * The locale program now provides detailed information about the installed
1613 only lists the names of the supported locales
1617 provides details such as country, language, and codeset name.
1618 Contributed by Ulrich Drepper.
1622 * The gencat program now parses the input file according to the charset
1623 selected by the LC_CTYPE category. This is important for stateful
1624 character sets. To make generating catalogs easier there is a way
1625 to overwrite the charset selected by the locale: before the first
1626 message or $ quote line the catalog can contain a line like
1628 $ codeset=ISO-8859-2
1630 to select the charset (ISO-8859-2 in this case).
1632 Implemented by Shinya Hanataka and Ulrich Drepper.
1634 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1635 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1636 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1638 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1639 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1641 * The LANGUAGE environment variable is now ignored unless the locale is
1642 changed from the default "C" locale.
1644 * The usual bug fixes.
1648 * Greg McGary added runtime support for bounds checking using gcc's
1649 new -fbounded-pointers option. ix86 target is complete. PowerPC
1652 * Thorsten Kukuk added secure mode support to nscd.
1654 * The Berkeley db libraries have been removed.
1656 Related, the nss_db module is now in a separate package since it
1657 obviously requires a database library being available.
1659 * Wide character I/O streams implemented by Ulrich Drepper.
1661 * Functions from the extended socket API added by Ulrich Drepper.
1663 * Functions feenableexcept and fedisableexcept to control the
1664 behaviour of individual exceptions have been added by Andreas Jaeger.
1666 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1668 * The resolver code has been updated from bind 8.2.3-T5B which supports
1669 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1672 This change could in some situations effect backward compatibility. Since
1673 now `_res' is a thread-local instead of a global variable, modifying it
1674 in one thread does not have any effect in other threads.
1676 The resolver library was also extended to allow IPv6 as the transport
1677 protocol for the requests. This work was done by Stig Venaas.
1679 * Compatibility code for K&R C compilers has been removed from the
1680 header files. A ISO C compiler is needed to use the library
1681 (conforming to either C89 or C99 standard).
1683 * Complete rewrite of the localedef program to support multibyte character
1684 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1685 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1686 Implemented by Ulrich Drepper.
1688 Bruno Haible significantly improved the generation and use of the data
1689 structures for the wide character tables.
1691 * Plural handling in gettext implemented by Ulrich Drepper.
1693 * The utmp daemon has been removed.
1695 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1697 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1700 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1702 * POSIX barriers implemented by Kaz Kylheku.
1704 * POSIX spawn function family implemented by Ulrich Drepper.
1706 * POSIX spinlocks are now available.
1708 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1710 * the configure option --enable-kernel=X.Y.Z allows to strip out
1711 compatibility for kernel versions before X.Y.Z. This is currently only
1712 implemented for Linux.
1714 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1715 field sin6_scope_id. This means that all programs using IPv6 should be
1716 recompiled. Don't expect binary compatibility with previous glibc
1719 * various conversion modules for IBM character sets contributed by
1722 * IA-64 port by Jes Sorensen and HJ Lu.
1736 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1738 * New xdr functions are added; some rpc functions are now 64bit clean.
1740 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1742 * Fixed known incompatibilities with glibc 2.0.
1744 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1746 * Optimized a number of functions (especially the ELF dynamic loader).
1748 * Update timezone data files.
1750 * lots of charmaps corrections
1752 * some new locale definitions and charmaps
1757 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1758 conform to POSIX member type requirements. Symbol versions have been
1759 adjusted as needed within the library, and for direct use by applications,
1760 but there is potential for problems if third-party libraries use
1761 struct timeval as part of their interface. This does not present
1762 a problem for X and other "essential" system libraries.
1764 * An additional locale model to support C++ Standard Library locale
1765 model and probably more was implemented by Ulrich Drepper.
1767 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1770 * Miles Bader provided the `argp' function family to support hierachical
1771 command line argument parsing, layered on top of getopt.
1773 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1775 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1778 * scanf recognizes the %a and %A format for scanning floating point numbers.
1780 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1781 information and interfaces for the available integer types.
1783 * about 130 new math functions were added to implement the ISO C9x math
1786 * the new header <complex.h> contains definitions of the complex math
1787 functions from ISO C 9X.
1789 * the new header <tgmath.h> defines generic macros to use complex or
1790 real valued functions.
1792 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1794 * Andreas Jaeger provided a test suite for the math library.
1796 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1798 * Ulrich Drepper added character set conversion functions (iconv).
1800 * Optimized string functions have been added.
1802 * The localedata addon is now part of glibc.
1804 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1806 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1807 daemon for NSS (nscd).
1809 Missing a better place here are some numbers on improvements. Under
1810 Linux 2.1.125 un-tar-ing the kernel sources takes
1814 using local files 12.19s 6.88s 22.91s
1816 using NIS 13.92s 8.91s 26.34s
1818 using NIS & nscd 10.37s 7.34s 25.30s
1820 using NIS+ 27.57s 30.37s 640.46s
1822 using NIS+ & nscd 10.25s 7.83s 26.51s
1824 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1826 Keep in mind that non-namelookup related operations dominate above times.
1827 It was just a common complain that using NIS+ unpacking the kernel is
1830 [1] The old nscd implementation is not available anymore since it was
1831 distributed with glibc up to version 2.0.98 and thus is now replaced.
1833 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1835 * Mark Kettenis provided a Hesiod NSS module.
1837 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1838 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1840 * rcmd can now handle netgroups (Dick Streefland).
1842 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1845 * Support for the IPv6 protocol has been added to the socket API, as per the
1846 latest draft standards.
1848 * Support for Linux 2.2 has been added.
1850 * Interface changes relative to the latest 2.0.x release:
1851 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1852 addseverity NEW: Unix98
1853 alphasort64 NEW: LFS
1854 argp_err_exit_status NEW: argp, GNU ext
1855 argp_error NEW: argp, GNU ext
1856 argp_failure NEW: argp, GNU ext
1857 argp_help NEW: argp, GNU ext
1858 argp_parse NEW: argp, GNU ext
1859 argp_program_bug_address NEW: argp, GNU ext
1860 argp_program_version NEW: argp, GNU ext
1861 argp_program_version_hook NEW: argp, GNU ext
1862 argp_state_help NEW: argp, GNU ext
1863 argp_usage NEW: argp, GNU ext
1864 authdes_create NEW: Secure RPC
1865 authdes_getucred NEW: Secure RPC
1866 authdes_pk_create NEW: Secure RPC
1867 backtrace NEW: GNU ext.
1868 backtrace_symbols NEW: GNU ext.
1869 backtrace_symbols_fd NEW: GNU ext.
1871 cacosf NEW: ISO C 9x
1872 cacosh NEW: ISO C 9x
1873 cacoshf NEW: ISO C 9x
1874 cacoshl NEW: ISO C 9x
1875 cacosl NEW: ISO C 9x
1882 casinf NEW: ISO C 9x
1883 casinh NEW: ISO C 9x
1884 casinhf NEW: ISO C 9x
1885 casinhl NEW: ISO C 9x
1886 casinl NEW: ISO C 9x
1888 catanf NEW: ISO C 9x
1889 catanh NEW: ISO C 9x
1890 catanhf NEW: ISO C 9x
1891 catanhl NEW: ISO C 9x
1892 catanl NEW: ISO C 9x
1893 cbc_crypt NEW: Secure RPC
1897 ccoshf NEW: ISO C 9x
1898 ccoshl NEW: ISO C 9x
1904 cimagf NEW: ISO C 9x
1905 cimagl NEW: ISO C 9x
1906 clearerr_locked REMOVED
1907 clntunix_create NEW: sunrpc ext
1909 clog10 NEW: ISO C 9x
1910 clog10f NEW: ISO C 9x
1911 clog10l NEW: ISO C 9x
1921 cprojf NEW: ISO C 9x
1922 cprojl NEW: ISO C 9x
1924 crealf NEW: ISO C 9x
1925 creall NEW: ISO C 9x
1930 csinhf NEW: ISO C 9x
1931 csinhl NEW: ISO C 9x
1934 csqrtf NEW: ISO C 9x
1935 csqrtl NEW: ISO C 9x
1939 ctanhf NEW: ISO C 9x
1940 ctanhl NEW: ISO C 9x
1942 des_setparity NEW: Secure RPC
1943 ecb_crypt NEW: Secure RPC
1944 endutxent NEW: Unix98
1946 exp10f NEW: ISO C 9x
1947 exp10l NEW: ISO C 9x
1951 fattach NEW: STREAMS
1952 fdetach NEW: STREAMS
1956 feclearexcept NEW: ISO C 9x
1957 fegetenv NEW: ISO C 9x
1958 fegetexceptflag NEW: ISO C 9x
1959 fegetround NEW: ISO C 9x
1960 feholdexcept NEW: ISO C 9x
1962 feraiseexcept NEW: ISO C 9x
1963 ferror_locked REMOVED
1964 fesetenv NEW: ISO C 9x
1965 fesetexceptflag NEW: ISO C 9x
1966 fesetround NEW: ISO C 9x
1967 fetestexcept NEW: ISO C 9x
1968 feupdateenv NEW: ISO C 9x
1969 fflush_locked REMOVED
1973 fgets_unlocked NEW: GNU ext.
1974 fileno_locked REMOVED
1986 fputc_locked REMOVED
1987 fputs_unlocked NEW: GNU ext.
1988 fread_unlocked NEW: GNU ext.
1993 fstatvfs NEW: Unix98
1997 ftruncate64 NEW: LFS
1999 fwrite_unlocked NEW: GNU ext.
2000 gai_strerror NEW: IPv6
2004 getchar_locked REMOVED
2006 getdate_err NEW: Unix98
2007 getdate_r NEW: GNU ext.
2009 getnameinfo NEW: IPv6
2010 getnetname NEW: Secure RPC
2011 getpmsg NEW: STREAMS
2012 getpt NEW: Unix98 PTY
2013 getrlimit64 NEW: LFS
2014 getutxent NEW: Unix98
2015 getutxid NEW: Unix98
2016 getutxline NEW: Unix98
2017 glob64 NEW: GNU ext.
2018 globfree64 NEW: GNU ext.
2019 gnu_get_libc_release NEW: GNU ext.
2020 gnu_get_libc_version NEW: GNU ext.
2021 grantpt NEW: Unix98 PTY
2022 host2netname NEW: Secure RPC
2024 iconv_close NEW: iconv
2025 iconv_open NEW: iconv
2026 if_freenameindex NEW: IPv6
2027 if_indextoname NEW: IPv6
2028 if_nameindex NEW: IPv6
2029 if_nametoindex NEW: IPv6
2030 in6addr_any NEW: IPv6
2031 in6addr_loopback NEW: IPv6
2032 inet6_isipv4mapped NEW: IPv6
2033 isastream NEW: STREAMS
2034 iswblank NEW: GNU ext.
2035 key_decryptsession NEW: Secure RPC
2036 key_decryptsession_pk NEW: Secure RPC
2037 key_encryptsession NEW: Secure RPC
2038 key_encryptsession_pk NEW: Secure RPC
2039 key_gendes NEW: Secure RPC
2040 key_get_conv NEW: Secure RPC
2041 key_secretkey_is_set NEW: Secure RPC
2042 key_setnet NEW: Secure RPC
2043 key_setsecret NEW: Secure RPC
2044 llrint NEW: ISO C 9x
2045 llrintf NEW: ISO C 9x
2046 llrintl NEW: ISO C 9x
2047 llround NEW: ISO C 9x
2048 llroundf NEW: ISO C 9x
2049 llroundl NEW: ISO C 9x
2054 lrintf NEW: ISO C 9x
2055 lrintl NEW: ISO C 9x
2056 lround NEW: ISO C 9x
2057 lroundf NEW: ISO C 9x
2058 lroundl NEW: ISO C 9x
2060 makecontext NEW: Unix98
2061 mempcpy NEW: GNU ext.
2064 modify_ldt NEW: kernel
2068 nearbyint NEW: ISO C 9x
2069 nearbyintf NEW: ISO C 9x
2070 nearbyintl NEW: ISO C 9x
2071 netname2host NEW: Secure RPC
2072 netname2user NEW: Secure RPC
2073 nexttoward NEW: ISO C 9x
2074 nexttowardf NEW: ISO C 9x
2075 nexttowardl NEW: ISO C 9x
2079 passwd2des NEW: Secure RPC
2081 pow10f NEW: GNU ext.
2082 pow10l NEW: GNU ext.
2085 printf_size NEW: GNU ext.
2086 printf_size_info NEW: GNU ext.
2087 profil_counter REMOVED
2088 pthread_mutexattr_getkind_np REPLACED
2089 pthread_mutexattr_setkind_np REPLACED
2090 ptsname NEW: Unix98 PTY
2091 ptsname_r NEW: Unix98 PTY
2093 putchar_locked REMOVED
2094 putgrent NEW: GNU ext.
2096 putpmsg NEW: STREAMS
2097 pututxline NEW: Unix98
2101 readdir64_r NEW: LFS
2102 remquo NEW: ISO C 9x
2103 remquof NEW: ISO C 9x
2104 remquol NEW: ISO C 9x
2106 roundf NEW: ISO C 9x
2107 roundl NEW: ISO C 9x
2109 scalbln NEW: ISO C 9x
2110 scalblnf NEW: ISO C 9x
2111 scalblnl NEW: ISO C 9x
2113 sendfile NEW: kernel
2114 setcontext NEW: Unix98
2115 setrlimit64 NEW: LFS
2116 setutxent NEW: Unix98
2118 sigignore NEW: Unix98
2119 sigqueue NEW: POSIX.1b
2120 sigrelse NEW: Unix98
2121 sigset NEW: POSIX.1b
2122 sigtimedwait NEW: POSIX.1b
2123 sigwaitinfo NEW: POSIX.1b
2124 sincos NEW: GNU ext.
2125 sincosf NEW: GNU ext.
2126 sincosl NEW: GNU ext.
2130 strcasestr NEW: GNU ext.
2131 strtoimax NEW: ISO C 9x
2132 strtoumax NEW: ISO C 9x
2133 strverscmp NEW: GNU ext.
2134 svcauthdes_stats NEW: Secure RPC
2135 svcunix_create NEW: sunrpc etx
2136 svcunixfd_create NEW: sunrpc ext
2137 swapcontext NEW: Unix98
2138 tcgetsid NEW: Unix98 PTY
2139 tdestroy NEW: GNU ext.
2140 tgamma NEW: ISO C 9x
2141 tgammaf NEW: ISO C 9x
2142 tgammal NEW: ISO C 9x
2146 truncf NEW: ISO C 9x
2147 truncl NEW: ISO C 9x
2149 unlockpt NEW: Unix98 PTY
2150 updwtmpx NEW: Unix98
2151 user2netname NEW: Secure RPC
2152 utmpxname NEW: Unix98
2153 versionsort NEW: GNU ext.
2154 versionsort64 NEW: GNU ext.
2156 wcscasecmp NEW: GNU ext.
2157 wcsncasecmp NEW: GNU ext.
2158 wcsnlen NEW: GNU ext.
2159 wcstoimax NEW: ISO C 9x
2160 wcstoll NEW: ISO C 9x
2161 wcstoull NEW: ISO C 9x
2162 wcstoumax NEW: ISO C 9x
2164 wordexp NEW: POSIX.2
2165 wordfree NEW: POSIX.2
2166 write_profiling REMOVED
2167 xdecrypt NEW: Secure RPC
2168 xdr_authdes_cred NEW: Secure RPC
2169 xdr_authdes_verf NEW: Secure RPC
2170 xdr_cryptkeyarg NEW: Secure RPC
2171 xdr_cryptkeyarg2 NEW: Secure RPC
2172 xdr_cryptkeyres NEW: Secure RPC
2173 xdr_getcredres NEW: Secure RPC
2174 xdr_key_netstarg NEW: Secure RPC
2175 xdr_key_netstres NEW: Secure RPC
2176 xdr_keybuf NEW: Secure RPC
2177 xdr_keystatus NEW: Secure RPC
2178 xdr_netnamestr NEW: Secure RPC
2179 xdr_sizeof NEW: Secure RPC
2180 xdr_unixcred NEW: sunrpc ext
2181 xencrypt NEW: Secure RPC
2182 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2193 * inet_ntoa is thread-safe
2195 * updwtmp is moved from libutil to libc
2197 * rewrite of cbrt function
2199 * update of timezone data
2213 * add atoll function
2215 * fix complex problems in Berkeley DB code
2217 * fix math functions
2221 * fixed lots of header problems (especially Linux/GNU specific)
2223 * dynamic loader preserves all registers
2225 * Roland McGrath provided support for handling of auxiliary objects in
2226 the ELF dynamic loader.
2228 * support for parallel builds is improved
2232 * GNU extensions are no longer declared by default. To enable them you
2233 must define the macro `_GNU_SOURCE' in your program or compile with
2236 * The library has changed from using GNU ld symbol aliases to using weak
2237 symbols where available. The ELF object file format supports weak
2238 symbols; GNU ld also supports weak symbols in the a.out format. (There
2239 is also now support for other GNU ld extensions in ELF. Use the
2240 `--with-elf' option to configure to indicate you have ELF, and
2241 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2242 of many files which contained only symbol aliases, reducing the size of
2243 the source and the compiled library; many other files were renamed to
2244 less cryptic names previously occupied by the symbol alias files.
2245 There is a new header file <elf.h> for programs which operate on
2246 files in the ELF format.
2248 * Converted to Autoconf version 2, so `configure' has more options.
2249 Run `configure --help' to see the details.
2251 * The library can now be configured to build profiling, highly-optimized
2252 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2253 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2254 `configure' enable building these extra libraries. The shared library is
2255 built by default when using both ELF and GNU ld. When shared libraries
2256 are enabled, the new library `-ldl' is available for arbitrary run-time
2257 loading of shared objects; its interface is defined in <dlfcn.h>. The
2258 new header file <link.h> gives access to the internals of the run-time
2259 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2260 application of same name on other systems and it provides information
2261 about dynamically linked binaries.
2263 * The C library now provides the run-time support code for profiling
2264 executables compiled with `-pg'. Programs can control the profiling code
2265 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2266 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2267 the support for this file format was contributed by David Mosberger-Tang.
2269 * The math code has been replaced with a math library based on fdlibm from
2270 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2271 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2272 functions. The math functions now reside in a separate library, so
2273 programs using them will need to use `-lm' their linking commands.
2275 * John C. Bowman contributed optimized ix87 assembler inline functions.
2277 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2278 mechanism similar to that found in Solaris 2. This is now used for the
2279 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2280 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2281 file controls what services are used for each individual database. This
2282 works by loading shared libraries with names specified in `nsswitch.conf',
2283 so service modules can be changed or added at any time without even
2284 relinking any program. Currently there are the file, db, and NIS based
2285 NSS services available.
2287 * The new functions `strtoq' and `strtouq' parse integer values from
2288 strings, like `strtol' and `strtoul', but they return `long long int' and
2289 `unsigned long long int' values, respectively (64-bit quantities).
2291 * The new functions `strtof' and `strtold' parse floating-point values from
2292 strings, like `strtod', but they return `float' and `long double' values,
2293 respectively (on some machines `double' and `long double' are the same).
2295 * Ulrich Drepper has contributed new implementations of the floating-point
2296 printing and reading code used in the `printf' family of functions and
2297 `strtod', `strtof', and `strtold'. These new functions are perfectly
2298 accurate, and much faster than the old ones.
2300 * The implementation of the POSIX locale model was completely rewritten by
2301 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2302 to compile the POSIX locale definition.
2304 * The former dummy implementations of the strcoll and strxfrm function are
2305 now replaced by fully functional code contributed by Ulrich Drepper. The
2306 collation information comes from the POSIX locale definitions.
2308 * The new header <langinfo.h> defines an interface for accessing
2309 various locale-dependent data (using the locale chosen with `setlocale').
2311 * Ulrich Drepper has contributed a new suite of functions for operation on
2312 wide-character and multibyte-character strings, in <wchar.h>;
2313 and classification and case conversion of wide characters, in <wctype.h>.
2314 These new functions are conforming to the ISO C, Amendement 1 specification.
2316 * There is now a second implementation of the standard I/O library available.
2317 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2318 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2320 * You can now use positional parameter specifications in format strings
2321 for the `printf' and `scanf' families of functions. For example,
2322 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2323 ``Number 6, Mr Jones''. This is mainly useful when providing different
2324 format strings for different languages, whose grammars may dictate
2325 different orderings of the values being printed. To support this
2326 feature, the interface for `register_printf_handler' has changed; see
2327 the header file <printf.h> for details.
2329 * The `printf' and `scanf' families of functions now understand a new
2330 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2331 to group numbers as indicated by the locale; for `scanf' and friends, this
2332 says to accept as valid only a number with all the proper grouping
2333 separators in the right places. In the default "C" locale, numbers are
2334 not grouped; but locales for specific countries will define the usual
2335 conventions (i.e. separate thousands with `,' in the US locale).
2337 * The pgrp functions have been regularized, slightly incompatibly but much
2338 less confusingly. The core functions are now `getpgid' and `setpgid',
2339 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2340 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2341 provided for compatibility. There is no longer an incompatible `getpgrp'
2342 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2344 * The new header file <fts.h> and suite of functions simplify programs that
2345 operate on directory trees. This code comes from 4.4 BSD.
2347 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2348 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2349 NSS scheme used in glibc.
2351 * There is a new malloc debugging hook `__memalign_hook'.
2353 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2354 `unsigned int' in <sys/types.h>. These are for compatibility only and
2355 their use is discouraged.
2357 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2358 done differently, so that it works even without GNU ld.
2360 * New function `euidaccess' checks allowed access to a file like `access',
2361 but using the effective IDs instead of the real IDs.
2363 * The time zone data files have been updated for the latest and greatest
2364 local time conventions of the countries of the world.
2366 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2369 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2370 for formatting floating-point numbers. They are provided only for
2371 compatibility; new programs should use `sprintf' instead. There are
2372 also equivalent function for the `long double' floating-point type and
2373 all functions also exist in a reentrant form.
2375 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2376 functions for maintaining the login-record files (primarily of use to
2377 system programs such as `login'), and convenient functions for
2378 allocating and initializing a pseudo-terminal (pty) device.
2380 * Ulrich Drepper has contributed new support for System V style
2381 shared memory and IPC on systems that support it.
2383 * Ulrich Drepper has contributed several miscellaneous new functions found
2384 in System V: The `hsearch' family of functions provide an effective
2385 implementation of hash tables; `a64l' and `l64a' provide a very simple
2386 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2389 * Ulrich Drepper has contributed new reentrant counterparts for the
2390 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2392 * Ulrich Drepper has contributed new, highly-optimized versions of several
2393 string functions for the i486/Pentium family of processors.
2395 * Ulrich Drepper has updated the Linux-specific code, based largely
2396 on work done in Hongjiu Lu's version of GNU libc for Linux.
2397 The GNU library now supports Linux versions 2.0.10 and later,
2398 using the ELF object file format (i[3456]86-*-linux).
2400 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2402 * David Mosberger-Tang and Richard Henderson have ported the C library
2403 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2404 dynamic linking support for ELF/Alpha.
2406 * Richard Henderson contributed several Alpha optimized assembler function
2407 for arithmetic and string handling.
2409 * Ulrich Drepper has contributed a new set of message catalog functions to
2410 support multiple languages using the <libintl.h> interface, for use with
2411 his new package GNU gettext. Translation volunteers have contributed
2412 catalogs of the library's messages in Spanish, German, and Korean.
2414 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2415 program and the `catgets' function for reading the catalog files it
2416 creates. (The <libintl.h> interface is preferred; we include the
2417 <nl_types.h> interface using `catgets' only for source compatibility with
2418 programs already written to use it.)
2420 * New header file <values.h> gives SVID-compatible names for <limits.h>
2423 * Various new macros, declarations, and small header files for compatibility
2426 * New function `group_member' is a convenient way to check if a process has
2427 a given effective group ID.
2429 * When using GCC 2.7 and later, the socket functions are now declared in a
2430 special way so that passing an argument of type `struct sockaddr_in *',
2431 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2432 `struct sockaddr *' type, does not generate a type-clash warning.
2434 * New function `error' declared in header file <error.h> is a convenient
2435 function for printing error messages and optionally exiting; this is the
2436 canonical function used in GNU programs. The new functions `err', `warn',
2437 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2438 doing the same thing.
2440 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2441 POSIX.2 `glob' function to do ~ and {...} expansion.
2443 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2444 `clearenv' which is used in POSIX.9 is also available.
2446 * New function `getsid' returns session ID number on systems that support it.
2448 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2449 files <db.h> and <mpool.h> provide a rich set of functions for several
2450 types of simple databases stored in memory and in files, and <ndbm.h> is
2451 an old `ndbm'-compatible interface using the `db' functions. Link with
2452 `-ldb' to get these functions.
2454 * New macro `strdupa' copies a string like `strdup', but uses local stack
2455 space from `alloca' instead of dynamic heap space from `malloc'.
2457 * New function `strnlen' is like `strlen' but searches only a given maximum
2458 number of characters for the null terminator. `stpncpy', `strndup' and
2459 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2462 * New function `statfs' in header <sys/statfs.h>.
2464 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2465 provide convenient functions for operating on blocks of null-terminated
2468 * A new suite of functions in <utmp.h> handle all the details of reading
2469 and writing the utmp file.
2471 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2474 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2475 completely POSIX compliant and also implemented the extended functionality
2476 to handle alternate digit representation and alternate era date formats.
2478 * Ulrich Drepper provided an implementation of the `strptime' function
2479 defined in XPG4.2 which transforms a string into a `struct tm' value.
2481 * Paul Eggert provided the tzselect shell script as part of the timezone
2482 code. The shell script makes it easy to select the correct timezone
2485 * The implementation of the malloc family of functions is completely replaced
2486 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2487 The implementation uses the mmap function (if available) and it is
2488 optimized for the use in multi threaded programs.
2490 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2491 functions. This new functionality is usable by specifying a special
2492 salt string and it is compatible with implementation on *BSD systems.
2494 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2495 `getsubopt' to handle second level command line options, `bsd_signal'
2496 to access BSD style `signal' functionality, the obsolete `regexp' style
2499 * the `lchown' function is available on system which support this
2502 * The implementation of the shadow password handling function was contributed
2505 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2507 * POSIX.1g support was added. The <sys/select.h> header is available,
2508 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2509 implementation of `getaddrinfo'.
2513 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2515 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2516 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2518 * The new function `daemon' from 4.4 BSD is useful for server programs that
2519 want to put themselves in the background.
2521 * Joel Sherrill has contributed support for several standalone boards that
2522 run without an operating system.
2524 * `printf', `scanf' and friends now accept a `q' type modifier for long
2525 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2527 * All of the code taken from BSD (notably most of the math and networking
2528 routines) has been updated from the BSD 4.4-Lite release.
2530 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2532 * The new functions `getdomainname' and `setdomainname' fetch or change the
2533 YP/NIS domain name. These are system calls which exist on systems which
2536 * The time zone data files have been updated for the latest international
2539 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2540 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2544 * The C library now includes support for Sun RPC, from Sun's free
2545 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2546 are included. (There is still no support for YP.)
2548 * Tom Quinn has contributed a port of the C library to SGI machines running
2549 Irix 4 (mips-sgi-irix4).
2551 * The new `lockf' function is a simplified interface to the locking
2552 facilities of `fcntl', included for compatibility.
2554 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2556 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2558 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2561 * The error message printed by `assert' for a failed assertion now includes
2562 the name of the program (if using GNU ld) and the name of the calling
2563 function (with versions of GCC that support this).
2565 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2567 * The library now includes the <sys/mman.h> header file and memory
2568 management functions `mmap', `munmap', `mprotect', `msync', and
2569 `madvise', on systems that support those facilities.
2571 * The interface for `mcheck' has changed slightly: the function called to
2572 abort the program when an allocation inconsistency is detected now takes
2573 an argument that indicates the type of failure. The new function
2574 `mprobe' lets you request a consistency check for a particular block at
2575 any time (checks are normally done only when you call `free' or `realloc'
2578 * It is now possible to easily cross-compile the C library, building on one
2579 system a library to run on another machine and/or operating system. All
2580 you need to do is set the variable `HOST_CC' in `configparms' to the
2581 native compiler for programs to run on the machine you are building on (a
2582 few generator programs are used on Unix systems); set `CC' to the
2585 * The new function `fexecve' (only implemented on the GNU system) executes
2586 a program file given a file descriptor already open on the file.
2590 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2591 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2593 * You can set the variable `libprefix' in `configparms' to specify a prefix
2594 to be prepended to installed library files; this makes it easy to install
2595 the GNU C library to be linked as `-lgnuc' or whatever.
2597 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2598 copies a limited number of characters from a string, and returns the
2599 address of the last character written.
2601 * You no longer need to check for whether the installed `stddef.h' is
2602 compatible with the GNU C library. configure now checks for you.
2604 * You can now define a per-stream `fileno' function to convert the
2605 stream's cookie into an integral file descriptor.
2607 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2608 allocates zero bytes of storage, and returns a unique pointer which
2609 you can pass to `realloc' or `free'. The behavior is undefined if
2610 you dereference this pointer.
2612 * The C library now runs on Sony NEWS m68k machines running either
2613 NewsOS 3 or NewsOS 4.
2615 * The new `syscall' function is a system-dependent primitive function
2616 for invoking system calls. It has the canonical behavior on Unix
2617 systems, including unreliable return values for some calls (such as
2618 `pipe', `fork' and `getppid').
2620 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2621 to `EAGAIN', which is the preferred name. On systems whose kernels
2622 use two distinct codes, the C library now translates EWOULDBLOCK to
2623 EAGAIN in every system call function.
2627 * The GNU C Library Reference Manual is now distributed with the library.
2628 `make dvi' will produce a DVI file of the printed manual.
2629 `make info' will produce Info files that you can read on line using C-h i
2630 in Emacs or the `info' program.
2631 Please send comments on the manual to bug-glibc-manual@gnu.org.
2633 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2635 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2637 * Jason Merrill has contributed a port to the Sequent Symmetry running
2638 Dynix version 3 (i386-sequent-dynix).
2640 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2641 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2643 * New function `memory_warnings' lets you arrange to get warnings when
2644 malloc is running out of memory to allocate, like Emacs gives you.
2646 * The C library now contains the relocating allocator used in Emacs 19 for
2647 its editing buffers. This allocator (ralloc) minimizes allocation
2648 overhead and fragmentation by moving allocated regions around whenever it
2649 needs to. You always refer to a ralloc'd region with a "handle" (a
2650 pointer to a pointer--an object of type `void **').
2652 * There is a new `printf' format: `%m' gives you the string corresponding
2653 to the error code in `errno'.
2655 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2656 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2657 pass, the `a' modifier says to fill in a `char **' you pass with a
2660 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2661 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2662 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2664 * `mkstemp' is a traditional Unix function to atomically create and open a
2665 uniquely-named temporary file.
2669 * The standard location for the file that says what the local timezone is
2670 has changed again. It is now `/usr/local/etc/localtime' (or more
2671 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2673 * The distribution no longer contains any files with names longer than 14
2676 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2677 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2679 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2683 * The configuration process has changed quite a bit. The `configure'
2684 script is now used just like the configuration scripts for other GNU
2685 packages. The `sysdeps' directory hierarchy is much rearranged.
2686 The file `INSTALL' explains the new scheme in detail.
2688 * The header files no longer need to be processed into ANSI C and
2689 traditional C versions. There is just one set of files to install, and
2690 it will work with ANSI or old C compilers (including `gcc -traditional').
2692 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2693 MIPS DECStation running Ultrix 4.
2695 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2696 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2697 made itself into a shared library.
2699 * Yet further improved support for the i386, running 4.3 BSD-like systems
2700 (such as Mach 3 with the Unix single-server), or System V.
2702 * New function `strncasecmp' to do case-insensitive string comparison
2703 with limited length.
2705 * New function `strsep' is a reentrant alternative to `strtok'.
2707 * New functions `scandir' and `alphasort' for searching directories.
2709 * New function `setenv' is a better interface to `putenv'.
2711 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2712 function for traversing a directory tree.
2714 * The GNU obstack package is now also part of the C library.
2715 The new function `open_obstack_stream' creates a stdio stream that
2716 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2717 formatted output directly to an obstack.
2719 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2720 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2722 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2724 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2725 things to your strings.
2727 * There are some new test programs: test-fseek, testmb, and testrand.
2729 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2730 These ports are not finished, but are a good starting place for really
2731 supporting those systems.
2733 * `/etc/localtime' is now the standard location for the file that says what
2734 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2735 This follows the general principle that `/etc' is the place for all local
2736 configuration files.
2738 * The C library header files now use `extern "C"' when used by the C++
2739 compiler, so the C library should now work with C++ code.
2741 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2742 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2745 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2746 function which uses the `merge sort' algorithm, and is said to be
2747 significantly faster than the old GNU `qsort' function. Merge sort is
2748 now the standard `qsort' function. The new algorithm can require a lot
2749 of temporary storage; so, the old sorting function is called when the
2750 required storage is not available.
2752 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2753 provides the Unix `crypt' function, plus some other entry points.
2755 * The code and header files taken from 4.4 BSD have been updated with the
2756 latest files released from Berkeley.
2758 ----------------------------------------------------------------------
2759 Copyright information:
2761 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2763 Permission is granted to anyone to make or distribute verbatim copies
2764 of this document as received, in any medium, provided that the
2765 copyright notice and this permission notice are preserved,
2766 thus giving the recipient permission to redistribute in turn.
2768 Permission is granted to distribute modified versions
2769 of this document, or of portions of it,
2770 under the above conditions, provided also that they
2771 carry prominent notices stating who last changed them.
2774 version-control: never