1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
36 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
37 the femode_t type and the FE_DFL_MODE macro.
39 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
40 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
41 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
42 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
43 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
44 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
45 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
46 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
47 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
48 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
49 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
52 * New <math.h> features are added from TS 18661-1:2014:
54 - Comparison macros: iseqsig.
56 - Classification macros: iscanonical, issubnormal, iszero.
58 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
59 for the Linux quota interface which predates kernel version 2.4.22 has
62 * DNSSEC-related declarations and definitions have been removed from the
63 <arpa/nameser.h> header file, and libresolv will no longer attempt to
64 decode the data part of DNSSEC record types. Previous versions of glibc
65 only implemented minimal support for the previous version of DNSSEC, which
66 is incompatible with the currently deployed version.
68 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
69 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
70 <arpa/nameser.h> header file because the distinction between RR types and
71 meta-RR types is not officially standardized, subject to revision, and
72 thus not suitable for encoding in a macro.
74 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
75 and rhook members of the res_state type in <resolv.h> have been removed.
76 The glibc stub resolver did not support these hooks, but the header file
79 * For multi-arch support it is recommended to use a GCC which has
80 been built with support for GNU indirect functions. This ensures
81 that correct debugging information is generated for functions
82 selected by IFUNC resolvers. This support can either be enabled by
83 configuring GCC with '--enable-gnu-indirect-function', or by
84 enabling it by default by setting 'default_gnu_indirect_function'
85 variable for a particular architecture in the GCC source file
88 Security related changes:
90 On ARM EABI (32-bit), generating a backtrace for execution contexts which
91 have been created with makecontext could fail to terminate due to a
92 missing .cantunwind annotation. This has been observed to lead to a hang
93 (denial of service) in some Go applications compiled with gccgo. Reported
94 by Andreas Schwab. (CVE-2016-6323)
96 The following bugs are resolved with this release:
98 [The release manager will add the list generated by
99 scripts/list-fixed-bugs.py just before the release.]
103 * The minimum Linux kernel version that this version of the GNU C Library
104 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
105 kernel version 2.6.32 or later suffices (on architectures that already
106 required kernel versions more recent than 3.2, those requirements remain
107 unchanged). Linux 3.2 or later kernel headers are required on all
110 * The pap_AN locale has been deleted. This has been deprecated for a long
111 time. It has been replaced by pap_AW & pap_CW, both of which have long
112 been included in previous releases.
114 * The readdir_r and readdir64_r functions have been deprecated. It is
115 recommended to use readdir and readdir64 instead.
117 * The type “union wait” has been removed. It was deprecated in the early
118 1990s and never part of POSIX. Application code should use the int type
119 instead of “union wait”.
121 * A new NSS action is added to facilitate large distributed system
122 administration. The action, MERGE, allows remote user stores like LDAP
123 to be merged into local user stores like /etc/groups in order to provide
124 easy to use, updated, and managed sets of merged credentials. The new
125 action can be used by configuring it in /etc/nsswitch.conf:
126 group: files [SUCCESS=merge] nis
127 Implemented by Stephen Gallagher (Red Hat).
129 * The deprecated __malloc_initialize_hook variable has been removed from the
132 * The long unused localedef --old-style option has been removed. It hasn't
133 done anything in over 16 years. Scripts using this option can safely
136 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
137 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
138 return the next representable value in the direction of positive infinity
139 and the nextdown functions return the next representable value in the
140 direction of negative infinity. These are currently enabled as GNU
143 Security related changes:
145 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
146 could result in a stack overflow when getnetbyname was called with an
147 overly long name. (CVE-2016-3075)
149 * Previously, getaddrinfo copied large amounts of address data to the stack,
150 even after the fix for CVE-2013-4458 has been applied, potentially
151 resulting in a stack overflow. getaddrinfo now uses a heap allocation
152 instead. Reported by Michael Petlan. (CVE-2016-3706)
154 * The glob function suffered from a stack-based buffer overflow when it was
155 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
156 Reported by Alexander Cherepanov. (CVE-2016-1234)
158 * The Sun RPC UDP client could exhaust all available stack space when
159 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
160 alloca plugin for GCC. (CVE-2016-4429)
162 * The IPv6 name server management code in libresolv could result in a memory
163 leak for each thread which is created, performs a failing naming lookup,
164 and exits. Over time, this could result in a denial of service due to
165 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
167 The following bugs are resolved with this release:
169 [1170] localedata: ne_NP: update Nepali locale definition file
170 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
172 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
173 [6796] math: fdim() does not set errno on overflow
174 [10354] libc: posix_spawn should use vfork() in more cases than presently
175 [11213] localedata: localedata: add copyright disclaimer to locale files
176 [12143] localedata: chr_US: new Cherokee locale
177 [12450] localedata: sgs_LT: new locale
178 [12676] localedata: ln_CD: new locale
179 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
181 [13304] math: fma, fmaf, fmal produce wrong results
182 [14259] build: --localedir arg to configure is ignored
183 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
184 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
185 [14934] localedata: es_CL: wrong first weekday chilean locale
186 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
188 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
190 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
191 [15368] nptl: raise() is not async-signal-safe
192 [15479] math: ceil, floor, round and trunc raise inexact exception
193 [15578] localedata: kk_KZ: various updates
194 [16003] localedata: pap_AN: punt old locale
195 [16137] localedata: iw_IL: punt old locale
196 [16190] localedata: eo: new esperanto locale
197 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
198 [16742] malloc: race condition: pthread_atfork() called before first
199 malloc() results in unexpected locking behaviour/deadlocks
200 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
202 [16983] localedata: postal_fmt does not allow %l and %n modifiers
203 [17565] localedata: pt_PT: wrong (work-)week start
204 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
205 [17950] build: Build fails with -msse
206 [18205] localedata: be_BY*: wrong first_weekday and first_workday
207 [18433] libc: posix_spawn does not return correctly upon failure to
209 [18453] localedata: charmaps/IBM875: incorrect codes
210 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
212 [18896] localedata: he_IL: improvements for currency
213 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
215 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
217 [19056] libc: Deprecate readdir_r
218 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
220 [19198] localedata: nl_NL: small improvements for Dutch locales
221 [19257] network: Per-thread memory leak in __res_vinit with IPv6
222 nameservers (CVE-2016-5417)
223 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
225 [19400] locale: Language missing in "iso-639.def", trivial fix in
227 [19431] malloc: Deadlock between fflush, getdelim, and fork
228 [19505] libc: Incorrect file descriptor validity checks in
229 posix_spawn_file_actions_add{open,close,dup2}
230 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
232 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
233 `intl/{gettextP,loadinfo}.h'
234 [19534] libc: execle, execlp may use malloc
235 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
236 [19573] network: res_nclose and __res_maybe_init disagree about name
237 server initialization, breaking Hesiod
238 [19575] localedata: Status of GB18030 tables
239 [19581] localedata: sr_* date_fmt string contains additional newline
240 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
242 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
243 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
244 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
245 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
247 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
249 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
251 [19610] dynamic-link: ldconfig -X removes stale symbolic links
252 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
253 [19633] locale: strfmon_l applies global locale to number formatting
254 [19642] network: Memory leak in getnameinfo
255 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
256 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
258 [19654] math: [x86_64] Need testcase for BZ #19590 fix
259 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
261 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
262 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
264 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
266 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
268 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
269 pointers and lengths in error-case.
270 [19727] locale: Converting from/to UTF-xx with iconv() does not always
271 report errors on UTF-16 surrogates values.
272 [19755] nscd: nscd assertion failure in gc
273 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
274 [19759] libc: mempcpy shouldn't be inlined
275 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
276 [19765] libc: s390 needs an optimized mempcpy
277 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
278 NAME_MAX limit assumption (CVE-2016-1234)
279 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
280 [19787] network: Missing and incorrect truncation checks in getnameinfo
281 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
283 [19791] network: Assertion failure in res_query.c with un-connectable name
285 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
286 [19822] math: libm.so install clobbers old version
287 [19825] network: resolv: send_vc can return uninitialized data in second
288 response to getaddrinfo
289 [19830] network: nss_dns: should check RDATA length against buffer length
290 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
291 confronted with A/AAAA records of invalid size
292 [19837] nss: nss_db: No retries for some long lines with a larger buffer
293 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
294 [19853] stdio: Printing IBM long double in decimal with high precision is
296 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
297 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
298 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
300 [19865] network: Assertion failure or memory leak in
301 _nss_dns_getcanonname_r
302 [19868] network: nss_dns: netent code does not skip over non-PTR records
303 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
305 [19881] string: Improve x86-64 memset
306 [19907] string: Incorrect memcpy tests
307 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
309 [19925] libc: termios.h XCASE namespace
310 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
311 [19929] libc: limits.h NL_NMAX namespace
312 [19931] stdio: Memory leak in vfprintf
313 [19957] libc: clone(CLONE_VM) access invalid parent memory
314 [19963] localedata: en_IL: New locale
315 [19989] stdio: stdio.h cuserid namespace
316 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
318 [19996] locale: langinfo.h nl_langinfo_l namespace
319 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
320 [20010] network: getaddrinfo: Stack overflow in hostent translation
322 [20012] stdio: libio: fmemopen append mode failure
323 [20014] stdio: stdio.h namespace for pre-threads POSIX
324 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
325 [20023] libc: fcntl.h timespec namespace
326 [20024] math: [x86_64] vectorized sincos trashes the stack
327 [20031] network: nss_hesiod: Heap overflow in get_txt_records
328 [20041] time: sys/time.h timespec namespace
329 [20043] libc: unistd.h missing cuserid for UNIX98 and before
330 [20044] libc: unistd.h missing pthread_atfork for UNIX98
331 [20051] libc: ttyslot in wrong header under wrong conditions
332 [20054] libc: gethostname not declared for XPG4
333 [20055] libc: termios.h missing tcgetsid for XPG4
334 [20072] dynamic-link: x86 init_cpu_features is called twice in static
336 [20073] libc: sys/stat.h fchmod namespace
337 [20074] libc: stdlib.h rand_r namespace
338 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
339 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
341 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
342 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
344 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
345 [20119] libc: Wrong mask for processors level type from CPUID
346 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
347 AS not supporting AVX512
348 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
350 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
351 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
353 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
354 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
355 [20178] libc: posix_spawn{p} should not call exit
356 [20191] stdio: libio: vtables hardening
357 [20195] string: FMA4 detection requires CPUID execution with register
359 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
360 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
362 [20212] math: acos (sNaN) returns sNaN
363 [20213] math: asin (sNaN) returns sNaN
364 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
365 [20218] math: [i386] asinhl (sNaN) returns sNaN
366 [20219] math: [i386] atanhl (sNaN) returns sNaN
367 [20222] stdio: fopencookie: Mangle function pointers
368 [20224] math: [i386] cbrtl (sNaN) returns sNaN
369 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
370 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
372 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
373 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
374 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
375 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
376 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
377 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
378 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
379 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
380 [20240] math: modf (sNaN) returns sNaN
381 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
382 [20250] math: frexp (sNaN) returns sNaN
383 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
384 [20255] math: [i386] fdim, fdimf return with excess range and precision /
386 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
387 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
388 subscript is below array bounds [-Werror=array-bounds]
389 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
390 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
392 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
393 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
395 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
397 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
398 [20316] localedata: id_ID: Februari instead of Pebruari
399 [20327] string: POWER8 strcasecmp returns incorrect result
400 [20347] math: Failure: Test: j0_downward (0xap+0)
401 [20348] libc: FAIL: misc/tst-preadvwritev64
402 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
403 [20350] libc: There is no test for p{read,write}64
404 [20357] math: Incorrect cos result for 1.5174239687223976
405 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
409 * Unicode 8.0.0 Support: Character encoding, character type info, and
410 transliteration tables are all updated to Unicode 8.0.0, using new
411 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
412 These updates cause user visible changes, such as the fixes for bugs
413 89, 16061, and 18568.
415 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
416 kernel-internal CPU set size. This means that requests that change the
417 CPU affinity which failed before (for example, an all-ones CPU mask) will
418 now succeed. Applications that need to determine the effective CPU
419 affinities need to call sched_getaffinity or pthread_getaffinity_np after
420 setting it because the kernel can adjust it (and the previous size check
421 would not detect this in the majority of cases).
423 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
424 the following new symbols are used: fts64_children, fts64_close,
425 fts64_open, fts64_read and fts64_set.
427 * getaddrinfo now detects certain invalid responses on an internal netlink
428 socket. If such responses are received, an affected process will
429 terminate with an error message of "Unexpected error <number> on netlink
430 descriptor <number>" or "Unexpected netlink response of size <number> on
431 descriptor <number>". The most likely cause for these errors is a
432 multi-threaded application which erroneously closes and reuses the netlink
433 file descriptor while it is used by getaddrinfo.
435 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
436 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
437 unnecessary serialization of memory allocation requests across threads.
438 The defect is now corrected. Users should see a substantial increase in
439 the concurent throughput of allocation requests for applications which
440 trigger this bug. Affected applications typically create and
441 destroy threads frequently. (Bug 19048 was reported and analyzed by
444 * There is now a --disable-timezone-tools configure option for disabling the
445 building and installing of the timezone related utilities (zic, zdump, and
446 tzselect). This is useful for people who build the timezone data and code
447 independent of the GNU C Library.
449 * The obsolete header <regexp.h> has been removed. Programs that require
450 this header must be updated to use <regex.h> instead.
452 * The obsolete functions bdflush, create_module, get_kernel_syms,
453 query_module and uselib are no longer available to newly linked binaries;
454 the header <sys/kdaemon.h> has been removed. These functions and header
455 were specific to systems using the Linux kernel and could not usefully be
456 used with the GNU C Library on systems with version 2.6 or later of the
459 * Optimized string, wcsmbs and memory functions for IBM z13.
460 Implemented by Stefan Liebler.
462 * Newly linked programs that define a variable called signgam will no longer
463 have it set by the lgamma, lgammaf and lgammal functions. Programs that
464 require signgam to be set by those functions must ensure that they use the
465 variable provided by the GNU C Library and declared in <math.h>, without
466 defining their own copy.
468 * The minimum GCC version that can be used to build this version of the GNU
469 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
470 still be used to compile programs using the GNU C Library.
472 Security related changes:
474 * An out-of-bounds value in a broken-out struct tm argument to strftime no
475 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
477 * The LD_POINTER_GUARD environment variable can no longer be used to disable
478 the pointer guard feature. It is always enabled. Previously,
479 LD_POINTER_GUARD could be used to disable security hardening in binaries
480 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
483 * An integer overflow in hcreate and hcreate_r could lead to an
484 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
486 * The catopen function no longer has unbounded stack usage. Reported by
489 * The nan, nanf and nanl functions no longer have unbounded stack usage
490 depending on the length of the string passed as an argument to the
491 functions. Reported by Joseph Myers. (CVE-2014-9761)
493 * A stack-based buffer overflow was found in libresolv when invoked from
494 libnss_dns, allowing specially crafted DNS responses to seize control
495 of execution flow in the DNS client. The buffer overflow occurs in
496 the functions send_dg (send datagram) and send_vc (send TCP) for the
497 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
498 family. The use of AF_UNSPEC triggers the low-level resolver code to
499 send out two parallel queries for A and AAAA. A mismanagement of the
500 buffers used for those queries could result in the response of a query
501 writing beyond the alloca allocated buffer created by
502 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
503 the overflow. Thanks to the Google Security Team and Red Hat for
504 reporting the security impact of this issue, and Robert Holiday of
505 Ciena for reporting the related bug 18665. (CVE-2015-7547)
507 The following bugs are resolved with this release:
509 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
510 [887] math: Math library function "logb" and "nextafter" inconsistent
511 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
512 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
513 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
514 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
516 [4404] localedata: German translation of "Alarm clock" is misleading
517 [6799] math: nextafter() and nexttoward() doen't set errno on
518 overflow/underflow errors
519 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
521 [10432] nis: _nss_nis_setnetgrent assertion failure
522 [11460] libc: fts has no LFS support
523 [12926] network: getaddrinfo()/make_request() may spin forever
524 [13065] nptl: Race condition in pthread barriers
525 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
526 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
528 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
529 [14912] libc: Rename non-installed bits/*.h headers
530 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
531 [15367] math: Let gcc use __builtin_isinf
532 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
533 [15421] math: lgamma wrongly sets signgam for ISO C
534 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
535 FE_INVALID with argument out of range
536 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
538 [15786] dynamic-link: ifunc resolver functions can smash function
540 [15918] math: Unnecessary check for equality in hypotf()
541 [16061] localedata: Review / update transliteration data
542 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
544 [16141] time: strptime %z offset restriction
545 [16171] math: drem should be alias of remainder
546 [16296] math: fegetround is pure?
547 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
548 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
550 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
551 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
553 [16422] math: [powerpc] math-float, math-double failing llrint tests with
554 "Exception "Inexact" set" on ppc32
555 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
556 [16517] math: Missing underflow exception from tanf/tan/tanl
557 [16519] math: Missing underflow exception from sinhf
558 [16520] math: Missing underflow exception from tanhf
559 [16521] math: Missing underflow exception from exp2
560 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
562 [16734] stdio: fopen calls mmap to allocate its buffer
563 [16961] math: nan function incorrect handling of bad sequences
564 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
565 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
566 [16985] locale: localedef: confusing error message when opening output
568 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
569 [17197] locale: Redundant shift character in iconv conversion output at
571 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
572 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
573 [17250] dynamic-link: static linking breaks nss loading
574 (getaddrinfo/getpwnam/etc...)
575 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
577 [17441] math: isnan() should use __builtin_isnan() in GCC
578 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
579 (related to lock elision)
580 [17787] manual: Exponent on page 324 of the PDF ends prematurely
581 [17886] time: strptime should be able to parse "Z" as a timezone with %z
582 [17887] time: strptime should be able to parse "+01:00" style timezones
583 [17905] libc: catopen() Multiple unbounded stack allocations
585 [18084] libc: backtrace (..., 0) dumps core on x86
586 [18086] libc: nice() sets errno to 0 on success
587 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
588 is too large (CVE-2015-8778)
589 [18251] dynamic-link: SONAME missing when audit modules provides path
590 [18265] libc: add attributes for wchar string and memory functions
591 [18370] math: csqrt missing underflows
592 [18421] libc: [hppa] read-only segment has dynamic relocations
593 [18472] libc: Obsolete syscall wrappers should be compat symbols
594 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
595 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
596 [18525] localedata: Remove locale timezone information
597 [18560] libc: [powerpc] spurious bits/ipc.h definitions
598 [18568] localedata: Update locale data to Unicode 8.0
599 [18589] locale: sort-test.sh fails at random
600 [18595] math: ctan, ctanh missing underflows
601 [18604] libc: assert macro-expands its argument
602 [18610] math: S390: fetestexcept() reports any exception if DXC-code
603 contains a vector instruction exception.
604 [18611] math: j1, jn missing errno setting on underflow
605 [18618] localedata: sync Chechen locale definitions with other *_RU
607 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
608 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
609 [18665] network: In send_dg, the recvfrom function is NOT always using the
610 buffer size of a newly created buffer (CVE-2015-7547)
611 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
613 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
615 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
616 [18699] math: tilegx cproj() for various complex infinities does not yield
618 [18724] libc: Harden put*ent functions against data injection
619 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
620 [18755] build: build errors with -DNDEBUG
621 [18757] stdio: fmemopen fails to set errno on failure
622 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
624 [18781] libc: openat64 lacks O_LARGEFILE
625 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
626 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
627 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
628 [18790] math: [ldbl-128ibm] tanhl inaccurate
629 [18795] libc: stpncpy fortification misses buffer lengths that are
631 [18796] build: build fails for --disable-mathvec
632 [18803] math: hypot missing underflows
633 [18820] stdio: fmemopen may leak memory on failure
634 [18823] math: csqrt spurious underflows
635 [18824] math: fma spurious underflows
636 [18825] math: pow missing underflows
637 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
638 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
639 [18870] build: sem_open.c fails to compile with missing symbol
641 [18872] stdio: Fix memory leak in printf_positional
642 [18873] libc: posix_fallocate overflow check ineffective
643 [18875] math: Excess precision leads incorrect libm
644 [18877] libc: arm: mmap offset regression
645 [18887] libc: memory corruption when using getmntent on blank lines
646 [18918] localedata: hu_HU: change time to HH:MM:SS format
647 [18921] libc: Regression: extraneous stat() and fstat() performed by
649 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
650 binaries (CVE-2015-8777)
651 [18951] math: tgamma missing underflows
652 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
654 [18953] localedata: lt_LT: change currency symbol to the euro
655 [18956] math: powf inaccuracy
656 [18961] math: [i386] exp missing underflows
657 [18966] math: [i386] exp10 missing underflows
658 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
659 [18969] build: multiple string test failures due to missing locale
661 [18970] libc: Reference of pthread_setcancelstate in libc.a
662 [18977] math: float / long double Bessel functions not in XSI POSIX
663 [18980] math: i386 libm functions return with excess range and precision
664 [18981] math: i386 scalb*, ldexp return with excess range and precision
665 [18982] stdio: va_list and vprintf
666 [18985] time: Passing out of range data to strftime() causes a segfault
668 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
669 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
670 [19012] locale: iconv_open leaks memory on error path
671 [19016] math: clog, clog10 inaccuracy
672 [19018] nptl: Mangle function pointers in tls_dtor_list
673 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
674 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
675 [19048] malloc: malloc: arena free list can become cyclic, increasing
677 [19049] math: [powerpc] erfc incorrect zero sign
678 [19050] math: [powerpc] log* incorrect zero sign
679 [19058] math: [x86_64] Link fail with -fopenmp and -flto
680 [19059] math: nexttoward overflow incorrect in non-default rounding modes
681 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
682 [19074] network: Data race in _res_hconf_reorder_addrs
683 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
684 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
685 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
687 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
689 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
690 [19086] manual: posix_fallocate64 documented argument order is wrong.
691 [19088] math: lround, llround missing exceptions close to overflow
693 [19094] math: lrint, llrint missing exceptions close to overflow threshold
694 [19095] math: dbl-64 lrint incorrect for 64-bit long
695 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
696 [19124] dynamic-link: ld.so failed to build with older assmebler
697 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
698 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
699 [19134] math: [powerpc32] lround, lroundf spurious exceptions
700 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
701 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
702 pthread_setaffinity_np
703 [19156] math: [ldbl-128] j0l spurious underflows
704 [19164] nptl: tst-getcpu fails with many possible CPUs
705 [19168] math: math/test-ildoubl and math/test-ldouble failure
706 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
707 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
709 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
710 (FE_NOMASK_ENV) do not clear SSE exceptions
711 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
712 _int_new_arena/reused_arena
713 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
714 [19201] math: dbl-64 remainder incorrect sign of zero result
715 [19205] math: bits/math-finite.h conditions do not match math.h and
717 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
718 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
719 for C99-based standards
720 [19212] libc: features.h not -Wundef clean
721 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
723 [19214] libc: Family and model identification for AMD CPU's are incorrect.
724 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
725 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
727 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
729 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
731 [19242] libc: strtol incorrect in Turkish locales
732 [19243] malloc: reused_arena can pick an arena on the free list, leading
733 to an assertion failure and reference count corruption
734 [19253] time: tzset() ineffective when temporary TZ did not include DST
736 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
737 [19270] math: [hppa] Shared libm missing __isnanl
738 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
739 MAP_HUGETLB and MAP_STACK defines
740 [19313] nptl: Wrong __cpu_mask for x32
741 [19347] libc: grantpt: try to force a specific gid even without pt_chown
742 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
743 [19350] math: [ldbl-128ibm] sinhl spurious overflows
744 [19351] math: [ldbl-128ibm] logl inaccurate near 1
745 [19363] time: x32: times() return value wrongly truncates/sign extends
747 [19367] dynamic-link: Improve branch prediction on Silvermont
748 [19369] network: Default domain name not reset by res_ninit when "search"
749 / "domain" entry is removed from resolv.conf
750 [19375] math: powerpc: incorrect results for POWER7 logb with negative
752 [19385] localedata: bg_BG: time separator should be colon, not comma
753 [19408] libc: linux personality syscall wrapper may erroneously return an
754 error on 32-bit architectures
755 [19415] libc: dladdr returns wrong names on hppa
756 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
757 IBM905, IBM907, and IBM909
758 [19439] math: Unix98 isinf and isnan functions conflict with C++11
759 [19443] build: build failures with -DDEBUG
760 [19451] build: Make check fails on test-double-vlen2
761 [19462] libc: Glibc failed to build with -Os
762 [19465] math: Wrong code with -Os
763 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
765 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
767 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
768 [19486] math: S390: Math tests fail with "Exception Inexact set".
769 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
770 [19550] libc: [mips] mmap negative offset handling inconsistent with other
772 [19590] math: Fail to build shared objects that use libmvec.so functions.
776 * The following bugs are resolved with this release:
778 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
779 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
780 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
781 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
782 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
783 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
784 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
785 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
786 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
787 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
788 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
789 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
790 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
791 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
792 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
793 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
794 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
795 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
796 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
797 18657, 18676, 18694, 18696, 18887.
799 * Cache information can be queried via sysconf() function on s390 e.g. with
800 _SC_LEVEL1_ICACHE_SIZE as argument.
802 * A buffer overflow in gethostbyname_r and related functions performing DNS
803 requests has been fixed. If the NSS functions were called with a
804 misaligned buffer, the buffer length change due to pointer alignment was
805 not taken into account. This could result in application crashes or,
806 potentially arbitrary code execution, using crafted, but syntactically
807 valid DNS responses. (CVE-2015-1781)
809 * The time zone file parser has been made more robust against crafted time
810 zone files, avoiding heap buffer overflows related to the processing of
811 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
812 large time zone data files. Overly long time zone specifiers in the TZ
813 variable no longer result in stack overflows and crashes.
815 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
816 for LD and GD on x86 and x86-64, has been implemented. You will need
817 binutils-2.24 or later to enable this optimization.
819 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
820 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
821 Hat). These updates cause user visible changes, such as the fix for bug
824 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
825 and getXXbyYY NSS calls for the same database, causing a denial-of-service
826 condition in some applications.
828 * Added vector math library named libmvec with the following vectorized x86_64
829 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
831 The library can be disabled with --disable-mathvec. Use of the functions is
832 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
833 Shared library libmvec.so is linked in as needed when using -lm (no need to
834 specify -lmvec explicitly for not static builds).
835 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
837 * A new fmemopen implementation has been added with the goal of POSIX
838 compliance. The new implementation fixes the following long-standing
839 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
840 old implementation is still present for use be by existing binaries.
842 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
843 releases. It has been fixed to match 2.19 and older, but binaries built
844 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
846 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
847 Contributed by Roland McGrath (Google).
849 * The header <regexp.h> is deprecated, and will be removed in a future
850 release. Use of this header will trigger a deprecation warning.
851 Application developers should update their code to use <regex.h> instead.
853 This header was formerly part of SUS, but was deprecated in 1994 and
854 removed from the standard in 2001. Also, the glibc implementation
855 leaks memory. See BZ#18681 for more details.
859 * The following bugs are resolved with this release:
861 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
862 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
863 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
864 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
865 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
866 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
867 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
868 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
869 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
870 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
873 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
874 too little memory for the to-be-scanned arguments and overflow the
875 allocated buffer. The implementation now correctly computes the required
876 buffer size when using malloc, and switches to malloc from alloca as
879 * A new semaphore algorithm has been implemented in generic C code for all
880 machines. Previous custom assembly implementations of semaphore were
881 difficult to reason about or ensure that they were safe. The new version
882 of semaphore supports machines with 64-bit or 32-bit atomic operations.
883 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
884 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
886 * Port to Altera Nios II has been contributed by Mentor Graphics.
888 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
889 implementations for powerpc64/powerpc64le.
890 Implemented by Adhemerval Zanella (IBM).
892 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
893 and powerpc64le. This may improve lock scaling of existing programs on
894 HTM capable systems. The lock elision code is only enabled with
895 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
896 powerpc will issue a transaction abort on every syscall to avoid side
897 effects being visible outside transactions.
899 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
900 AArch64. Contributed by ARM Ltd.
902 * i386 memcpy functions optimized with SSE2 unaligned load/store.
904 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
905 under certain input conditions resulting in the execution of a shell for
906 command substitution when the application did not request it. The
907 implementation now checks WRDE_NOCMD immediately before executing the
908 shell and returns the error WRDE_CMDSUB as expected.
910 * CVE-2012-3406 printf-style functions could run into a stack overflow when
911 processing format strings with a large number of format specifiers.
913 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
914 infinite loop if the DNS response contained a PTR record of an unexpected
917 * The minimum GCC version that can be used to build this version of the GNU
918 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
919 still be used to compile programs using the GNU C Library.
921 * The GNU C Library is now built with -Werror by default. This can be
922 disabled by configuring with --disable-werror.
924 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
926 * The obsolete sigvec function has been removed. This was the original
927 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
928 programs have been using instead for about 25 years. Of course, ABI
929 compatibility for old binaries using sigvec remains intact.
931 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
932 with newer versions of bison.
934 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
935 The original MIPS o32 hard-float ABI requires an FPU where double-precision
936 registers overlay two consecutive single-precision registers. MIPS32R2
937 introduced a new FPU mode (FR=1) where double-precision registers extend the
938 corresponding single-precision registers which is incompatible with the
939 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
940 require the use of FR=1 making a transition necessary. New o32 ABI
941 extensions enable users to migrate over time from the original o32 ABI
942 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
943 tracks the ABI of any loaded object and verifies that new objects are
944 compatible. Mode transitions will also be requested as required and
945 unsupportable objects will be rejected. The ABI checks include both soft and
946 hard float ABIs for o32, n32 and n64.
948 GCC 5 with GNU binutils 2.25 onwards:
949 It is strongly recommended that all o32 system libraries are built using the
950 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
951 with the original and all new o32 ABI extensions. Configure a MIPS GCC
952 compiler using --with-fp-32=xx to set this by default.
956 * The following bugs are resolved with this release:
958 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
959 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
960 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
961 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
962 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
963 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
964 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
965 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
966 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
967 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
968 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
969 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
970 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
971 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
972 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
974 * Reverted change of ABI data structures for s390 and s390x:
975 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
976 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
977 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
978 are preserved pointing straight to the same implementation as the old ones.
979 Given that, new callers will simply provide a too-big buffer to these
980 functions. Any applications/libraries out there that embed jmp_buf or
981 ucontext_t in an ABI-relevant data structure that have already been rebuilt
982 against 2.19 headers will have to rebuilt again. This is necessary in any
983 case to revert the breakage in their ABI caused by the glibc change.
985 * Support for file description locks is added to systems running the
986 Linux kernel. The standard file locking interfaces are extended to
987 operate on file descriptions, not file descriptors, via the use of
988 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
989 are associated with an open file instead of a process.
991 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
993 * The minimum Linux kernel version that this version of the GNU C Library
994 can be used with is 2.6.32.
996 * Running the testsuite no longer terminates as soon as a test fails.
997 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
998 with PASS or FAIL lines for individual tests. A summary of the results is
999 printed, including a list of failing lists, and "make check" exits with
1000 error status if there were any unexpected failures. "make check
1001 stop-on-test-failure=y" may be used to keep the old behavior.
1003 * The am33 port, which had not worked for several years, has been removed
1006 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1007 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1008 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1009 conflicted with POSIX (support for which was removed in 2.19), the
1010 interfaces those macros enabled remain available when compiling with
1011 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1012 test macros defined.
1014 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1016 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1017 This may improve lock scaling of existing programs on TX capable systems.
1018 The lock elision code is only built with --enable-lock-elision=yes and
1019 then requires a GCC version supporting the TX builtins. With lock elision
1020 default mutexes are elided via __builtin_tbegin, if the cpu supports
1021 transactions. By default lock elision is not enabled and the elision code
1024 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1025 copy the path argument. This allowed programs to cause posix_spawn to
1026 deference a dangling pointer, or use an unexpected pathname argument if
1027 the string was modified after the posix_spawn_file_actions_addopen
1030 * All supported architectures now use the main glibc sysdeps directory
1031 instead of some being in a separate "ports" directory (which was
1032 distributed separately before glibc 2.17).
1034 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1035 On configurations that support it (all Linux configurations), it's now
1036 used regardless of the --enable-add-ons switch to configure. It is no
1037 longer possible to build such configurations without pthreads support.
1039 * Locale names, including those obtained from environment variables (LANG
1040 and the LC_* variables), are more tightly checked for proper syntax.
1041 setlocale will now fail (with EINVAL) for locale names that are overly
1042 long, contain slashes without starting with a slash, or contain ".." path
1043 components. (CVE-2014-0475) Previously, some valid locale names were
1044 silently replaced with the "C" locale when running in AT_SECURE mode
1045 (e.g., in a SUID program). This is no longer necessary because of the
1048 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1049 with application code using Intel MPX instructions. (With all previous
1050 versions, the MPX register state could be clobbered when making calls
1051 into or out of a shared library.) Note that while the new dynamic
1052 linker is compatible with all known x86 hardware whether or not it
1053 supports Intel MPX, some x86 instruction-set emulators might fail to
1054 handle the new instruction encodings. This is known to affect Valgrind
1055 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1056 release), and might affect other tools that do instruction emulation.
1058 * Support for loadable gconv transliteration modules has been removed.
1059 The support for transliteration modules has been non-functional for
1060 over a decade, and the removal is prompted by security defects. The
1061 normal gconv conversion modules are still supported. Transliteration
1062 with //TRANSLIT is still possible, and the //IGNORE specifier
1063 continues to be supported. (CVE-2014-5119)
1065 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1066 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1067 resulting a denial-of-service security vulnerability in applications which
1068 use functions related to iconv. (CVE-2014-6040)
1072 * The following bugs are resolved with this release:
1074 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1075 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1076 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1077 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1078 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1079 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1080 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1081 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1082 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1083 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1084 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1085 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1086 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1087 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1088 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1089 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1090 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1091 16431, 16453, 16474, 16506, 16510, 16529
1093 * Slovenian translations for glibc messages have been contributed by the
1094 Translation Project's Slovenian team of translators.
1096 * The public headers no longer use __unused nor __block. This change is to
1097 support compiling programs that are derived from BSD sources and use
1098 __unused internally, and to support compiling with Clang's -fblock
1099 extension which uses __block.
1101 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1102 large collation sequences to optimize multiple passes. This cache
1103 computation may overflow for large collation sequences and may cause a
1104 stack or buffer overflow. This is now fixed to use a slower algorithm
1105 which does not use a cache if there is an integer overflow.
1107 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1108 rules for large collation sequences to optimize multiple passes and falls
1109 back to alloca if malloc fails, resulting in a possible stack overflow.
1110 The implementation now falls back to an uncached collation sequence lookup
1113 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1114 initialized for static applications resulting in the security feature
1115 being disabled. The pointer guard is now correctly initialized to a
1116 random value for static applications. Existing static applications need
1117 to be recompiled to take advantage of the fix (bug 15754).
1119 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1120 to the d_name member of struct dirent, or omit the terminating NUL
1121 character. (Bugzilla #14699).
1123 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1124 aligned_alloc functions could allocate too few bytes or corrupt the
1125 heap when passed very large allocation size values (Bugzilla #15855,
1128 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1129 for AF_INET6 has been fixed (Bugzilla #16072).
1131 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1132 pap_CW, quz_PE, the_NP.
1134 * Substantially revised locales: gd_GB, ht_HT
1136 * The LC_ADDRESS field was updated to support country_car for almost all
1139 * ISO 1427 definitions were updated.
1141 * ISO 3166 definitions were updated.
1143 * The localedef utility now supports --big-endian and --little-endian
1144 command-line options to generate locales for a different system from that
1145 for which the C library was built.
1147 * Binary locale files now only depend on the endianness of the system for
1148 which they are generated and not on other properties of that system. As a
1149 consequence, binary files generated with new localedef may be incompatible
1150 with old versions of the GNU C Library, and binary files generated with
1151 old localedef may be incompatible with this version of the GNU C Library,
1152 in the following circumstances:
1154 + Locale files may be incompatible on m68k systems.
1156 + Locale archive files (but not separate files for individual locales) may
1157 be incompatible on systems where plain "char" is signed.
1159 * The configure option --disable-versioning has been removed. Builds with
1160 --disable-versioning had not worked for several years.
1162 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1163 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1165 * SystemTap probes for malloc have been introduced.
1167 * SystemTap probes for slow multiple precision fallback paths of
1168 transcendental functions have been introduced.
1170 * Support for powerpc64le has been added.
1172 * The soft-float powerpc port now supports e500 processors.
1174 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1176 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1177 set of header declarations that are enabled by default, even when other
1178 feature test macros or compiler options such as -std=c99 would otherwise
1179 disable some of those declarations.
1181 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1182 conflict with POSIX. The libbsd-compat library (which was a dummy library
1183 that did nothing) has also been removed.
1185 * Preliminary documentation about Multi-Thread, Async-Signal and
1186 Async-Cancel Safety has been added.
1188 * Change of ABI data structures for s390 and s390x:
1189 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1190 allow for future hardware extensions. All library functions that accept or
1191 return these structures were versioned in order to provide backwards
1192 compatibility with existing code. However, not all cases can be handled
1193 with interface versioning. If an application embeds either structure into
1194 another structure and that structure is passed to another compilation unit
1195 which expects the newer larger-sized object then any access to the new
1196 fields will result in undefined behaviour. Similarly any access to fields
1197 that were moved by the enlarging of the structures will cause undefined
1198 behaviour. To fix the undefined behaviour all objects that are part of the
1199 final in-memory image must agree on the size of structures, and this may
1200 require recompilation.
1204 * The following bugs are resolved with this release:
1206 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1207 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1208 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1209 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1210 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1211 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1212 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1213 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1214 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1215 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1216 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1217 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1218 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1221 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1222 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1223 Distributions can re-enable building and using pt_chown via the new configure
1224 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1225 considerable security risks and should only be used if the distribution
1226 understands and accepts the risks.
1228 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1231 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1232 fixed (Bugzilla #15330).
1234 * Add support for calling C++11 thread_local object destructors on thread
1235 and program exit. This needs compiler support for offloading C++11
1236 destructor calls to glibc.
1238 * Improved worst case performance of libm functions with double inputs and
1241 * Support for priority inherited mutexes in pthread condition variables on
1242 non-x86 architectures.
1244 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1246 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1248 * Optimized string functions for ARM. Implemented by Will Newton and
1251 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1253 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1256 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1257 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1259 * Added a benchmark framework to track performance of functions in glibc.
1261 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1262 It is based on draft TS 18661 and currently enabled as a GNU extension.
1264 * On Linux, the clock function now uses the clock_gettime system call
1265 for improved precision, rather than old times system call.
1267 * Added support for version-3 tz format files. This is needed when using
1268 the tz database release 2013e or later, and affects a few unusual cases --
1269 currently only TZ='America/Godthab' for time stamps after 2037.
1271 * Added new API functions pthread_getattr_default_np and
1272 pthread_setattr_default_np to get and set the default pthread
1273 attributes of a process.
1275 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1276 This may improve lock scaling of existing programs on TSX capable systems.
1277 When the --enable-lock-elision=yes parameter is specified at configure
1278 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1281 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1282 availability). Implemented by Ryan S. Arnold.
1284 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1288 * The following bugs are resolved with this release:
1290 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1291 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1292 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1293 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1294 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1295 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1296 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1297 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1298 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1299 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1300 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1301 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1302 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1303 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1304 14879, 14889, 14893, 14898, 14914.
1306 * Optimization of memcpy for MIPS.
1308 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1309 EMFILE has been fixed (Bugzilla #14889).
1311 * The add-on ports collection is now distributed in the "ports" subdirectory
1312 of the main GNU C Library distribution, rather than separately.
1314 * Port to ARM AArch64 contributed by Linaro.
1316 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1317 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1319 Implemented by Andreas Krebbel.
1321 * The new function secure_getenv allows secure access to the environment,
1322 returning NULL if running in a SUID/SGID process. This function replaces
1323 the internal function __secure_getenv.
1325 * SystemTap static probes have been added into the dynamic linker.
1326 Implemented by Gary Benson.
1328 * Optimizations of string functions strstr, strcasestr and memmem.
1329 Implemented by Maxim Kuvyrkov.
1331 * The minimum Linux kernel version that this version of the GNU C Library
1332 can be used with is 2.6.16.
1334 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1335 powerpc POWER7. Implemented by Will Schmidt.
1337 * New configure option --disable-nscd builds the C library such that it
1338 never attempts to contact the Name Service Caching Daemon (nscd).
1339 New configure option --disable-build-nscd avoids building nscd itself;
1340 this is the default if --disable-nscd is used.
1342 * Improved support for cross-compilation, including cross-testing and
1343 bootstrap builds without a previously built glibc.
1345 * Several testsuite tests are now able to test multiple IFUNC variants of an
1346 interface, rather than just testing the one that would be chooen by
1349 * New configure options --with-bugurl and --with-pkgversion, for
1350 distributors to use to embed their bug-reporting and package version
1351 information in --help and --version output.
1353 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1354 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1355 allows creation of chroots without the procfs mounted on /proc.
1357 * The `crypt' function now fails if passed salt bytes that violate the
1358 specification for those values. On Linux, the `crypt' function will
1359 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1360 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1361 when the mode is enabled.
1363 * The `clock_*' suite of functions (declared in <time.h>) is now available
1364 directly in the main C library. Previously it was necessary to link with
1365 -lrt to use these functions. This change has the effect that a
1366 single-threaded program that uses a function such as `clock_gettime' (and
1367 is not linked with -lrt) will no longer implicitly load the pthreads
1368 library at runtime and so will not suffer the overheads associated with
1369 multi-thread support in other code such as the C++ runtime library.
1371 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1376 * The following bugs are resolved with this release:
1378 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1379 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1380 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1381 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1382 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1383 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1384 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1385 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1386 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1387 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1388 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1389 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1390 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1391 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1392 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1393 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1394 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1395 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1396 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1397 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1398 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1399 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1402 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1403 configuring glibc with:
1404 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1405 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1406 Implemented by H.J. Lu.
1410 + define static_assert
1412 + do not declare gets
1414 + declare at_quick_exit and quick_exit also for ISO C11
1416 + aligned_alloc. NB: The code is deliberately allows the size parameter
1417 to not be a multiple of the alignment. This is a moronic requirement
1418 in the standard but it is only a requirement on the caller, not the
1421 + timespec_get added
1423 + uchar.h support added
1425 + CMPLX, CMPLXF, CMPLXL added
1427 Implemented by Ulrich Drepper.
1429 * Support for the IA-64 has been moved to ports.
1431 * Remove support for anything but ELF binary format
1433 * Checking versions of poll, ppoll added.
1434 Implemented by Ulrich Drepper.
1436 * More generic and 64-bit performance optimizations to math functions.
1437 Implemented by Ulrich Drepper.
1439 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1440 headers and functions available at compile time as they were before
1441 version 2.14. This option will be removed at some time in the future
1442 after the TI-RPC library becomes fully sufficient for the needs of
1443 existing applications.
1445 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1446 Note that glibc is not expected to work with any Linux kernel version
1449 * New header <sys/auxv.h> and function getauxval allowing easy access to
1450 the AT_* key-value pairs passed from the Linux kernel. The header also
1451 defines the HWCAP_* bits associated with the AT_HWCAP key.
1453 * New locales: mag_IN
1455 * New configure option --enable-systemtap builds SystemTap static probes
1456 into libc for setjmp and longjmp and into libpthread for various operations.
1457 So far the setjmp/longjmp probes and some of the libpthread probes are
1458 provided only for i*86 and x86_64.
1459 Implemented by Roland McGrath and Rayson Ho.
1461 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1463 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1466 * More optimized functions for SPARC. Implemented by David S. Miller.
1468 * Improved support for cross-compilation, especially bootstrap builds
1469 without a previously built glibc.
1471 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1472 Chris Metcalf from Tilera.
1474 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1475 now supported for ARM processors.
1477 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1478 as the name of the dynamic linker, to distinguish it from the
1479 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1481 * Support for CRIS has been removed from ports.
1483 * A new class of installed header has been documented for low-level
1484 platform-specific functionality. PowerPC added the first instance with a
1485 function to provide time base register access. Contributed by Tulio
1486 Magno Quites Machado Filho.
1488 * ix86 configurations now install header files that are consistent with
1489 what x86-64 configurations install. These same header files can be used
1490 for -m32, -m64, or -mx32 builds.
1491 Contributed by H.J. Lu.
1493 * Math library bug fixes. A thorough audit of all open math library bugs was
1494 conducted by Joseph Myers. Significant progress was made on many math
1495 library bugs resulting in more accurate exceptions and function results.
1496 Many thanks to all those that contributed including Andreas Jaeger for his
1497 patch review and work on the x87 trigonometric instruction issues.
1499 * Timezone data is no longer installed. Timezone-related binaries and scripts
1500 will continue to be installed. Users should obtain their timezone data from
1501 their distribution provider or from the tzdata package at
1502 <ftp://munnari.oz.au/pub/>.
1506 * The following bugs are resolved with this release:
1508 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1509 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1510 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1511 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1512 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1513 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1514 13484, 13506, 13515, 13523, 13524, 13538, 13540
1516 * New program pldd to list loaded object of a process
1517 Implemented by Ulrich Drepper.
1519 * Add nss_db support back to glibc. No more dependency on Berkeley db
1520 and support for initgroups lookups.
1521 Implemented by Ulrich Drepper.
1523 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1524 Contributed by HJ Lu.
1526 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1527 Contributed by HJ Lu.
1529 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1530 on x86-32 and x86-64.
1531 Contributed by Liubov Dmitrieva.
1533 * Optimized strchr and strrchr for SSE on x86-32.
1534 Contributed by Liubov Dmitrieva.
1536 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1537 for x86-64 and x86-32.
1538 Contributed by Liubov Dmitrieva.
1540 * New interfaces: scandirat, scandirat64
1541 Implemented by Ulrich Drepper.
1543 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1544 Implemented by Ulrich Drepper.
1546 * nscd now also caches the netgroup database.
1547 Implemented by Ulrich Drepper.
1549 * Integrate libm with gcc's -ffinite-math-only option.
1550 Implemented by Ulrich Drepper.
1552 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1553 to math functions. Implemented by Ulrich Drepper.
1555 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1556 Implemented by Ulrich Drepper.
1558 * New Linux interfaces: process_vm_readv, process_vm_writev
1560 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1561 Implemented by Ulrich Drepper.
1563 * Optimized nearbyint and strcasecmp for PPC.
1564 Implemented by Adhemerval Zanella.
1566 * New locales: bho_IN, unm_US, es_CU, ta_LK
1570 * The following bugs are resolved with this release:
1572 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1573 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1574 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1575 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1576 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1577 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1578 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1579 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1580 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1581 12795, 12811, 12813, 12814, 12841
1583 * The RPC implementation in libc is obsoleted. Old programs keep working
1584 but new programs cannot be linked with the routines in libc anymore.
1585 Programs in need of RPC functionality must be linked against TI-RPC.
1586 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1588 Visible changes of this change include (obviously) the inability to link
1589 programs using RPC functions without referencing the TI-RPC library and the
1590 removal of the RPC headers from the glibc headers.
1591 Implemented by Ulrich Drepper.
1593 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1594 syncfs, setns, sendmmsg
1596 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1597 yue_HK, lij_IT, mhr_RU
1599 * New encodings: CP770, CP771, CP772, CP773, CP774
1601 * New program sotruss to trace calls through PLTs
1602 Implemented by Ulrich Drepper.
1604 * The malloc hook implementation is marked deprecated and will be removed
1605 from the default implementation in the next version. The design never
1606 worked ever since the introduction of threads. Even programs which do
1607 not create threads themselves can use multiple threads created internally.
1611 * The following bugs are resolved with this release:
1613 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1614 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1615 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1616 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1619 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1621 * POWER7 optimizations: memset, memcmp, strncmp
1623 * New optimized string functions for x86-64: strnlen (SSE2),
1624 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1625 Implemented by Ulrich Drepper.
1629 * The following bugs are resolved with this release:
1631 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1632 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1633 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1634 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1635 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1636 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1637 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1638 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1640 * New interfaces: pthread_getname_np, pthread_setname_np
1642 * New Linux interface: recvmmsg
1644 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1646 * The dynamic linker now recognizes supported ABI versions from the
1647 EI_ABIVERSION field in the ELF header.
1648 Implemented by Ulrich Drepper.
1650 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1651 will not be used to fill in password fields in the passwd.byname replies.
1652 Instead it is used to synthesize the shadow.byname table, should it be
1653 missing. This is a useful mode in some installations involving Solaris.
1654 Implemented by Ulrich Drepper.
1656 * New locales: kok_IN, sq_MK, cv_RU
1660 * The following bugs are resolved with this release:
1662 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1663 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1664 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1665 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1666 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1667 10789, 10817, 10823, 10840, 10847
1669 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1671 Implemented by Ulrich Drepper.
1673 * Checking version of longjmp added that fails if an uninitialized stack
1674 frame would be created. Implemented by Ulrich Drepper.
1676 * STT_GNU_IFUNC is now supported in static executables.
1677 Implemented by H.J. Lu.
1679 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1681 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1682 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1683 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1684 Contributed by H.J. Lu.
1686 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1687 Implemented by Ulrich Drepper.
1689 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1691 Contributed by H.J. Lu.
1693 * Support for fma instruction in AVX on x86-64.
1694 Implemented by H.J. Lu and Ulrich Drepper.
1696 * AVX support in x86-64 auditing support in ld.so.
1697 Implemented by H.J. Lu.
1699 * STB_GNU_UNIQUE support added.
1700 Implemented by Ulrich Drepper.
1702 * Implement second fallback mode for optimized DNS lookup for even more
1703 broken environments. If two requests from the same port are not
1704 handled correctly close the socket and open a new one before sending
1705 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1706 can be used to select this mode right away, instead of rediscovering the
1707 necessity is every process again.
1708 Implemented by Ulrich Drepper.
1710 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1711 Implemented by Adam Tkac.
1713 * Optimized iconv conversions for S390x.
1714 Implemented by Andreas Krebbel.
1716 * Using condvars with PI mutexes is now more efficient due to kernel
1717 support for requeueing to PI futexes. NPTL support added for x86-64.
1718 Implemented by Ulrich Drepper.
1720 * New locales: ps_AF, my_MM
1724 * The following bugs are resolved with this release:
1726 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1727 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1728 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1729 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1730 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1732 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1733 Implemented by Ulrich Drepper.
1735 * New Linux interfaces: accept4, fallocate, fallocate64.
1736 Implemented by Ulrich Drepper.
1738 * Correct declarations of string function when used in C++ code. This
1739 could lead to compile errors for invalid C++ code.
1741 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1744 * New POSIX 2008 interface: psiginfo
1745 Implemented by Ulrich Drepper.
1747 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1748 Implemented by Ulrich Drepper.
1750 * Support for selecting between multiple function definitions at runtime
1751 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1753 * The libcrypt library can now use the hash function implementations in
1754 NSS. Implemented by Ulrich Drepper.
1756 * The malloc implementation can be compiled to be less memory efficient
1757 but higher performing in multi-threaded programs.
1758 Implemented by Ulrich Drepper.
1760 * New locales: nan_TW@latin, ks_IN
1762 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1763 Implemented by Ulrich Drepper.
1765 * Extended printf hook support. It is possible to use user-defined types
1766 and extend existing format specifiers.
1767 Implemented by Ulrich Drepper.
1769 * Handling for group shadow files has been added.
1770 Implemented by Ulrich Drepper.
1772 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1773 servers (the case, e.g., for some people using the built-in DNS
1774 server in ADSL modems/routers). There is a once-per-process timeout
1775 in case of a broken server. To avoid it, users can run nscd or put
1776 'options single-request' in /etc/resolv.conf.
1777 Implemented by Ulrich Drepper.
1781 * The following bugs are resolved with this release:
1783 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1784 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1785 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1786 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1787 6968, 6974, 6980, 6995, 7008, 7009, 7029
1789 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1790 up at the same time. Implemented by Ulrich Drepper.
1792 * TLS descriptors for LD and GD on x86 and x86-64.
1793 Implemented by Alexandre Oliva.
1795 * getaddrinfo now handles DCCP and UDPlite.
1796 Implemented by Ulrich Drepper.
1798 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1799 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1800 Implemented by Ulrich Drepper.
1802 * New implementation of memmem, strstr, and strcasestr which is O(n).
1803 Implemented by Eric Blake.
1805 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1807 * Implement "e" option for popen to open file descriptor with the
1808 close-on-exec flag set. Implemented by Ulrich Drepper.
1810 * Implement "b" mode for fmemopen. In this mode writes writes don't
1811 implicitly add a NUL byte and seeks from the end of the buffer really
1812 use the buffer end, not the string length as the basis.
1813 Implemented by Ulrich Drepper.
1815 * Many functions, exported and internal, now atomically set the close-on-exec
1816 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1818 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1820 Implemented by Pravin Satpute.
1822 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1826 * The following bugs are resolved with this release:
1828 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1829 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1830 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1831 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1832 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1833 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1834 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1836 * New locales: bo_CN, bo_IN, shs_CA.
1838 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1840 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1841 Implemented by Pravin Satpute.
1843 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1845 * nscd caches now all timeouts for DNS entries
1846 Implemented by Ulrich Drepper.
1848 * nscd is more efficient and wakes up less often.
1849 Implemented by Ulrich Drepper.
1851 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1852 vdprintf, and obstack_vprintf.
1853 Implemented by Jakub Jelinek.
1855 * Faster memset for x86-64.
1856 Implemented by Harsha Jagasia and H.J. Lu.
1858 * Faster memcpy on x86.
1859 Implemented by Ulrich Drepper.
1861 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1862 Implemented by Ulrich Drepper.
1864 * Faster sqrt and sqrtf implemention for some PPC variants.
1865 Implemented by Steven Munroe.
1869 * The following bugs are resolved with this release:
1871 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1872 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1873 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1874 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1875 5071, 5103, 5104, 5112, 5113, 5184, 5186
1877 * More checking functions: fread, fread_unlocked, open*, mq_open.
1878 Implemented by Jakub Jelinek and Ulrich Drepper.
1880 * Extend fortification to C++. Implemented by Jakub Jelinek.
1882 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1883 by not recognizing 'a' as a modifier when those specs are requested.
1884 Implemented by Jakub Jelinek.
1886 * PPC optimizations to math and string functions.
1887 Implemented by Steven Munroe.
1889 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1890 options to be passed. Implemented by Ulrich Drepper.
1892 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1894 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1895 Implemented by Ulrich Drepper.
1897 * Handle private futexes in the NPTL implementation.
1898 Implemented by Jakub Jelinek and Ulrich Drepper.
1900 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1901 Implemented by Roland McGrath and Ulrich Drepper.
1903 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1905 * SHA-256 and SHA-512 based password encryption.
1906 Implemented by Ulrich Drepper.
1908 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1909 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1912 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1913 Implemented by Ulrich Drepper.
1917 * The following bugs are resolved with this release:
1919 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1920 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1921 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1922 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1923 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1924 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1925 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1928 * New Linux interfaces: epoll_pwait, sched_getcpu.
1930 * New generic interfaces: strerror_l.
1932 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1936 * The following bugs are resolved with this release:
1938 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1939 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1940 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1941 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1942 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1943 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1944 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1945 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1946 3225, 3251, 3252, 3253, 3273
1948 * For Linux, the sorting of addresses returned by getaddrinfo now also
1949 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1950 Implemented by Ulrich Drepper.
1952 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1953 Implemented by Ulrich Drepper.
1955 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1957 * New iconv module for MIK. Contributed by Alexander Shopov.
1959 * For sites with broken group and/or passwd database, the auto-propagate
1960 option of nscd can prevent creating ID lookup entries from the results
1961 of a name lookup and vice versa. This usually is no problem but some
1962 site might have problems with the default behavior.
1963 Implemented by Ulrich Drepper.
1965 * Iterating over entire database in NIS can be slow. With the
1966 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1967 to trade time for memory. The entire database will be read at once.
1968 Implemented by Ulrich Drepper.
1970 * The interfaces introduced in RFC 3542 have been implemented by
1973 * Support for the new ELF hash table format was added by Ulrich Drepper.
1975 * Support for priority inheritance mutexes added by Jakub Jelinek and
1978 * Support for priority protected mutexes added by Jakub Jelinek.
1980 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1981 or_IN, csb_PL, fy_NL, sr_ME.
1985 * More overflow detection functions.
1987 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1988 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1990 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1991 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1992 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1993 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1994 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1995 by Masahide Washizawa.
1997 * It is now possible to install audit libraries for the dynamic linker using
1998 LD_AUDIT. Implemented by Ulrich Drepper.
2000 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2001 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2002 For a libc and libpthread that works well on Linux 2.4 kernels, we
2003 recommend using the stable 2.3 branch.
2005 * The new function open_wmemstream acts like open_memstream,
2006 but uses a wchar_t wide character buffer.
2008 * The new function ppoll is an improved version of poll, similar to pselect.
2010 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2011 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2012 renameat, unlinkat, linkat, symlinkat, readlinkat.
2014 * New Linux kernel system calls: unshare,
2015 inotify_init, inotify_add_watch, inotify_rm_watch.
2017 * The euidaccess function is now also known by the alias eaccess,
2018 for compatibility with some other systems.
2020 * Timezone data updated to 2006b version.
2024 * The following bugs are resolved with this release:
2026 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2027 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2028 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2029 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2030 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2031 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2033 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2035 * As of this release, GCC 4 can be used to compile the C Library.
2037 * Timezone data updated to 2005m version.
2041 * The following bugs are resolved with this release:
2043 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2044 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2045 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2046 777, 787, 821, 822, 823, 825
2048 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2052 * Support for RFC 3678. Real implementations exist only for Linux so far.
2053 Implemented by Ulrich Drepper.
2055 * nscd can now cache entries persistently. Expiring entries are reloaded.
2056 For speedups the cache can be shared in memory with client processes.
2057 Implemented by Ulrich Drepper.
2059 * nscd can now perform SELinux checks.
2060 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2062 * getaddrinfo queries are now cached. Canonical name lookup is performed
2064 Implemented by Ulrich Drepper.
2066 * The nothrow function attribute is used when headers are used by gcc when
2067 compiling C code. This can avoid significant amounts of exception
2070 * The malloc functions perform more error checking and are stricter when
2071 it comes to reacting on errors. The default action is to terminate
2072 the process after showing an error message. Implemented by Ulrich Drepper.
2074 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2075 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2077 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2078 namespaces using the new function dlmopen(). This feature is of course,
2079 like most other dynamic loading functionality, not available in statically
2080 linked applications. Implemented by Ulrich Drepper.
2082 * Low-overhead boundary checking variants of string and some stdio functions
2083 were added. These are to be used in conjunction with a gcc patch by
2084 Jakub Jelinek which adds calls to these functions if possible.
2085 Implemented by Jakub Jelinek and Ulrich Drepper.
2087 * Old code for several operating systems and machine architectures that
2088 have not been in working condition in a long time have been removed from
2089 the main source tree maintained by the GNU C Library's maintainers.
2090 These files are now reside in the separate `ports' source module
2091 that is usable as an add-on when building the library.
2095 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2096 interrogate the dynamic linker, compatible with the Solaris interface.
2098 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2099 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2101 * getifaddrs now uses the netlink interface on Linux to get its information.
2102 Implemented by Thorsten Kukuk.
2104 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2105 Implemented by Ulrich Drepper.
2107 * support for non-executable stacks on x86 has been added. Changes mostly
2110 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2113 * getaddrinfo now performs destination address selection according to
2118 * Thread-safe interfaces for many functions that access locale data
2119 were added in version 2.3, but these features were omitted from NEWS.
2120 Many functions have variants with an `_l' suffix that take a `locale_t'
2121 object as a parameter rather than consulting the current locale.
2122 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2123 create and maintain `locale_t' objects. Additionally, the new function
2124 `uselocale' sets "the current locale" (as used by functions not so
2125 parameterized) set for an individual thread. These features were added
2126 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2128 * The functions getresuid, getresgid, setresuid, and setresgid, which
2129 have long been available on Linux, are now declared in <unistd.h>
2130 and are now also available on the Hurd.
2132 * ELF thread-local storage support (TLS) now works on x86-64.
2134 * The new dynamic string token $LIB is expanded in shared library names.
2135 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2137 * Aldy Hernandez contributed complete software floating point support for
2138 PowerPC machines with no FPU.
2140 * fexecve is implemented on Linux.
2142 * The `btowc' function should work at least twice as fast due to
2143 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2145 * With approriate thread add-ons cancelable functions are now implemented
2146 in libc.so as well. No need to call the function in libpthread. This
2147 change allowed to finally disable the incorrect and expensive handling
2148 of weak definition in ld.so.
2150 * Yet more PLT entries in libc.so have been removed. We finally arrived
2151 at the bare minimum. Startup times improved appropriately.
2153 * Support for the new Linux/x86 system call interface was added. The
2154 AT_SYSINFO auxiliary vector entry is recognized and handled.
2158 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2161 * iconv (the program and the interface) now accepts empty names (excluding
2162 options like //TRANSLIT) to mean "use charset of current locale".
2164 * localedef can now transliterate characters in strings which are not in
2165 the provided charmap. The information from the input locale is used.
2167 * Prelinking support was added for ELF targets. This requires additional
2168 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2170 * Read-only stdio streams now use mmap to speed up operation by eliminating
2171 copying and buffer underflows. To use add 'm' to the mode string of
2172 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2174 * The malloc functions were completely rewritten by Wolfram Gloger based
2175 on Doug Lea's malloc-2.7.0.c.
2177 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2178 implementation of regex.
2180 * Bruno Haible upgraded the iconv and locale implementation to support
2183 * Contents of the LC_* and LANG environment variables in the CEN style are
2184 not recognized anymore. It never was used. Change by Ulrich Drepper.
2186 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2187 thread-local storage (TLS) ABI on some platforms.
2188 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2190 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2191 EUC-JISX0213, and TSCII.
2193 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2194 BSD-compatible interface for getting all network interface addresses.
2195 Implementation for IPv4 by Roland McGrath.
2197 * Loading of locale data is faster due to the introduction of a locale
2198 archive. Implemented by Roland McGrath and Ulrich Drepper.
2200 * Startup times are significantly reduced by not using exported functions
2201 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2204 * Steven Munroe contributed a port to PowerPC64/Linux.
2208 * The Hurd now uses the GNU libio implementation of stdio rather than the
2209 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2211 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2212 with the same behavior as the Linux system call of the same name.
2216 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2217 128-bit long double format.
2219 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2220 IBM1161, and IBM1162 charsets.
2222 * Andreas Jaeger contributed a port to x86-64/Linux.
2224 * Peter Bruin contributed a port to PowerPC/Hurd.
2226 * libc functions using I/O streams now can handle wide-oriented streams
2229 * optimizations in the dynamic linker. Binaries created by recent binutils
2230 versions start up quicker due to reduced time spent on relocations.
2232 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2236 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2237 asinh, atanh, j0 for the 128-bit long double format.
2239 * Bruno Haible updated all the code handling Unicode in some form to
2240 support Unicode 3.1.
2242 * Speed of regex for single-byte locales is back to previous levels.
2243 Patch by Isamu Hasegawa.
2245 * Alpha, SPARC, and IA-64 now also using floating stacks.
2247 * Startup time of internationalized applications greatly improved through
2248 iconv cache. Use iconvconfig to generate the cache file.
2249 Contributed by Ulrich Drepper.
2251 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2252 severe performance problems. Patch by David Mosberger.
2254 * The Hurd port got a lot more functionality like AIO, various stdio
2255 extensions, etc. Mainly done by Roland McGrath.
2257 * mtrace can now lookup symbols in shared libraries.
2261 * Intel's IA-64 math library is largely integrated. It provides fast and
2262 accurate implementatations for most basic and standard math functions
2263 in float, double, and long double format.
2265 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2266 and asin for the 96-bit long double format and asin, log, tan for the
2267 128-bit long double format.
2269 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2270 The basic double functions exist today. Contributed by Abraham Ziv
2271 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2272 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2274 * An asynchronous name lookup library was added. The interface is designed
2275 after POSIX AIO. The proposal was circulated beforehand to get comments.
2276 No negative ones came in. Implemented by Ulrich Drepper.
2278 * Port to S390/64bit contributed by Martin Schwidefsky
2279 <schwidefsky@de.ibm.com>.
2281 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2282 of functions for Linux/IA-64.
2284 * The RPC code is now thread safe. Threads can now use the same service
2285 of different services at the same time. Patch by Eric Norum
2286 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2288 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2289 family of functions for Linux/S390.
2291 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2292 of functions for Linux/x86.
2294 * Port to Linux/CRIS contributed by Axis Communications.
2298 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2299 we can now check for namespace violations and missing declarations. The
2300 result is that almost all headers are now Unix-compliant (as defined in
2301 the upcoming XPG6). The negative side is that some programs might need
2302 corrections, too, if they depend on the incorrect form of the headers in
2303 previous versions which defined too many symbols and included too many
2306 * regex now handles multibyte character sets correctly.
2307 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2309 * iconv (the program) does now conform to the upcoming XPG6 and handles
2310 charmaps. Instead of the charset names the path of charmaps can be
2311 provided and the conversion happens based on this data.
2312 Contributed by Ulrich Drepper.
2314 * The locale program now provides detailed information about the installed
2319 only lists the names of the supported locales
2323 provides details such as country, language, and codeset name.
2324 Contributed by Ulrich Drepper.
2328 * The gencat program now parses the input file according to the charset
2329 selected by the LC_CTYPE category. This is important for stateful
2330 character sets. To make generating catalogs easier there is a way
2331 to overwrite the charset selected by the locale: before the first
2332 message or $ quote line the catalog can contain a line like
2334 $ codeset=ISO-8859-2
2336 to select the charset (ISO-8859-2 in this case).
2338 Implemented by Shinya Hanataka and Ulrich Drepper.
2340 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2341 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2342 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2344 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2345 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2347 * The LANGUAGE environment variable is now ignored unless the locale is
2348 changed from the default "C" locale.
2350 * The usual bug fixes.
2354 * Greg McGary added runtime support for bounds checking using gcc's
2355 new -fbounded-pointers option. ix86 target is complete. PowerPC
2358 * Thorsten Kukuk added secure mode support to nscd.
2360 * The Berkeley db libraries have been removed.
2362 Related, the nss_db module is now in a separate package since it
2363 obviously requires a database library being available.
2365 * Wide character I/O streams implemented by Ulrich Drepper.
2367 * Functions from the extended socket API added by Ulrich Drepper.
2369 * Functions feenableexcept and fedisableexcept to control the
2370 behaviour of individual exceptions have been added by Andreas Jaeger.
2372 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2374 * The resolver code has been updated from bind 8.2.3-T5B which supports
2375 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2378 This change could in some situations effect backward compatibility. Since
2379 now `_res' is a thread-local instead of a global variable, modifying it
2380 in one thread does not have any effect in other threads.
2382 The resolver library was also extended to allow IPv6 as the transport
2383 protocol for the requests. This work was done by Stig Venaas.
2385 * Compatibility code for K&R C compilers has been removed from the
2386 header files. A ISO C compiler is needed to use the library
2387 (conforming to either C89 or C99 standard).
2389 * Complete rewrite of the localedef program to support multibyte character
2390 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2391 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2392 Implemented by Ulrich Drepper.
2394 Bruno Haible significantly improved the generation and use of the data
2395 structures for the wide character tables.
2397 * Plural handling in gettext implemented by Ulrich Drepper.
2399 * The utmp daemon has been removed.
2401 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2403 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2406 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2408 * POSIX barriers implemented by Kaz Kylheku.
2410 * POSIX spawn function family implemented by Ulrich Drepper.
2412 * POSIX spinlocks are now available.
2414 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2416 * the configure option --enable-kernel=X.Y.Z allows to strip out
2417 compatibility for kernel versions before X.Y.Z. This is currently only
2418 implemented for Linux.
2420 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2421 field sin6_scope_id. This means that all programs using IPv6 should be
2422 recompiled. Don't expect binary compatibility with previous glibc
2425 * various conversion modules for IBM character sets contributed by
2428 * IA-64 port by Jes Sorensen and HJ Lu.
2442 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2444 * New xdr functions are added; some rpc functions are now 64bit clean.
2446 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2448 * Fixed known incompatibilities with glibc 2.0.
2450 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2452 * Optimized a number of functions (especially the ELF dynamic loader).
2454 * Update timezone data files.
2456 * lots of charmaps corrections
2458 * some new locale definitions and charmaps
2463 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2464 conform to POSIX member type requirements. Symbol versions have been
2465 adjusted as needed within the library, and for direct use by applications,
2466 but there is potential for problems if third-party libraries use
2467 struct timeval as part of their interface. This does not present
2468 a problem for X and other "essential" system libraries.
2470 * An additional locale model to support C++ Standard Library locale
2471 model and probably more was implemented by Ulrich Drepper.
2473 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2476 * Miles Bader provided the `argp' function family to support hierachical
2477 command line argument parsing, layered on top of getopt.
2479 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2481 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2484 * scanf recognizes the %a and %A format for scanning floating point numbers.
2486 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2487 information and interfaces for the available integer types.
2489 * about 130 new math functions were added to implement the ISO C9x math
2492 * the new header <complex.h> contains definitions of the complex math
2493 functions from ISO C 9X.
2495 * the new header <tgmath.h> defines generic macros to use complex or
2496 real valued functions.
2498 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2500 * Andreas Jaeger provided a test suite for the math library.
2502 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2504 * Ulrich Drepper added character set conversion functions (iconv).
2506 * Optimized string functions have been added.
2508 * The localedata addon is now part of glibc.
2510 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2512 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2513 daemon for NSS (nscd).
2515 Missing a better place here are some numbers on improvements. Under
2516 Linux 2.1.125 un-tar-ing the kernel sources takes
2520 using local files 12.19s 6.88s 22.91s
2522 using NIS 13.92s 8.91s 26.34s
2524 using NIS & nscd 10.37s 7.34s 25.30s
2526 using NIS+ 27.57s 30.37s 640.46s
2528 using NIS+ & nscd 10.25s 7.83s 26.51s
2530 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2532 Keep in mind that non-namelookup related operations dominate above times.
2533 It was just a common complain that using NIS+ unpacking the kernel is
2536 [1] The old nscd implementation is not available anymore since it was
2537 distributed with glibc up to version 2.0.98 and thus is now replaced.
2539 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2541 * Mark Kettenis provided a Hesiod NSS module.
2543 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2544 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2546 * rcmd can now handle netgroups (Dick Streefland).
2548 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2551 * Support for the IPv6 protocol has been added to the socket API, as per the
2552 latest draft standards.
2554 * Support for Linux 2.2 has been added.
2556 * Interface changes relative to the latest 2.0.x release:
2557 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2558 addseverity NEW: Unix98
2559 alphasort64 NEW: LFS
2560 argp_err_exit_status NEW: argp, GNU ext
2561 argp_error NEW: argp, GNU ext
2562 argp_failure NEW: argp, GNU ext
2563 argp_help NEW: argp, GNU ext
2564 argp_parse NEW: argp, GNU ext
2565 argp_program_bug_address NEW: argp, GNU ext
2566 argp_program_version NEW: argp, GNU ext
2567 argp_program_version_hook NEW: argp, GNU ext
2568 argp_state_help NEW: argp, GNU ext
2569 argp_usage NEW: argp, GNU ext
2570 authdes_create NEW: Secure RPC
2571 authdes_getucred NEW: Secure RPC
2572 authdes_pk_create NEW: Secure RPC
2573 backtrace NEW: GNU ext.
2574 backtrace_symbols NEW: GNU ext.
2575 backtrace_symbols_fd NEW: GNU ext.
2577 cacosf NEW: ISO C 9x
2578 cacosh NEW: ISO C 9x
2579 cacoshf NEW: ISO C 9x
2580 cacoshl NEW: ISO C 9x
2581 cacosl NEW: ISO C 9x
2588 casinf NEW: ISO C 9x
2589 casinh NEW: ISO C 9x
2590 casinhf NEW: ISO C 9x
2591 casinhl NEW: ISO C 9x
2592 casinl NEW: ISO C 9x
2594 catanf NEW: ISO C 9x
2595 catanh NEW: ISO C 9x
2596 catanhf NEW: ISO C 9x
2597 catanhl NEW: ISO C 9x
2598 catanl NEW: ISO C 9x
2599 cbc_crypt NEW: Secure RPC
2603 ccoshf NEW: ISO C 9x
2604 ccoshl NEW: ISO C 9x
2610 cimagf NEW: ISO C 9x
2611 cimagl NEW: ISO C 9x
2612 clearerr_locked REMOVED
2613 clntunix_create NEW: sunrpc ext
2615 clog10 NEW: ISO C 9x
2616 clog10f NEW: ISO C 9x
2617 clog10l NEW: ISO C 9x
2627 cprojf NEW: ISO C 9x
2628 cprojl NEW: ISO C 9x
2630 crealf NEW: ISO C 9x
2631 creall NEW: ISO C 9x
2636 csinhf NEW: ISO C 9x
2637 csinhl NEW: ISO C 9x
2640 csqrtf NEW: ISO C 9x
2641 csqrtl NEW: ISO C 9x
2645 ctanhf NEW: ISO C 9x
2646 ctanhl NEW: ISO C 9x
2648 des_setparity NEW: Secure RPC
2649 ecb_crypt NEW: Secure RPC
2650 endutxent NEW: Unix98
2652 exp10f NEW: ISO C 9x
2653 exp10l NEW: ISO C 9x
2657 fattach NEW: STREAMS
2658 fdetach NEW: STREAMS
2662 feclearexcept NEW: ISO C 9x
2663 fegetenv NEW: ISO C 9x
2664 fegetexceptflag NEW: ISO C 9x
2665 fegetround NEW: ISO C 9x
2666 feholdexcept NEW: ISO C 9x
2668 feraiseexcept NEW: ISO C 9x
2669 ferror_locked REMOVED
2670 fesetenv NEW: ISO C 9x
2671 fesetexceptflag NEW: ISO C 9x
2672 fesetround NEW: ISO C 9x
2673 fetestexcept NEW: ISO C 9x
2674 feupdateenv NEW: ISO C 9x
2675 fflush_locked REMOVED
2679 fgets_unlocked NEW: GNU ext.
2680 fileno_locked REMOVED
2692 fputc_locked REMOVED
2693 fputs_unlocked NEW: GNU ext.
2694 fread_unlocked NEW: GNU ext.
2699 fstatvfs NEW: Unix98
2703 ftruncate64 NEW: LFS
2705 fwrite_unlocked NEW: GNU ext.
2706 gai_strerror NEW: IPv6
2710 getchar_locked REMOVED
2712 getdate_err NEW: Unix98
2713 getdate_r NEW: GNU ext.
2715 getnameinfo NEW: IPv6
2716 getnetname NEW: Secure RPC
2717 getpmsg NEW: STREAMS
2718 getpt NEW: Unix98 PTY
2719 getrlimit64 NEW: LFS
2720 getutxent NEW: Unix98
2721 getutxid NEW: Unix98
2722 getutxline NEW: Unix98
2723 glob64 NEW: GNU ext.
2724 globfree64 NEW: GNU ext.
2725 gnu_get_libc_release NEW: GNU ext.
2726 gnu_get_libc_version NEW: GNU ext.
2727 grantpt NEW: Unix98 PTY
2728 host2netname NEW: Secure RPC
2730 iconv_close NEW: iconv
2731 iconv_open NEW: iconv
2732 if_freenameindex NEW: IPv6
2733 if_indextoname NEW: IPv6
2734 if_nameindex NEW: IPv6
2735 if_nametoindex NEW: IPv6
2736 in6addr_any NEW: IPv6
2737 in6addr_loopback NEW: IPv6
2738 inet6_isipv4mapped NEW: IPv6
2739 isastream NEW: STREAMS
2740 iswblank NEW: GNU ext.
2741 key_decryptsession NEW: Secure RPC
2742 key_decryptsession_pk NEW: Secure RPC
2743 key_encryptsession NEW: Secure RPC
2744 key_encryptsession_pk NEW: Secure RPC
2745 key_gendes NEW: Secure RPC
2746 key_get_conv NEW: Secure RPC
2747 key_secretkey_is_set NEW: Secure RPC
2748 key_setnet NEW: Secure RPC
2749 key_setsecret NEW: Secure RPC
2750 llrint NEW: ISO C 9x
2751 llrintf NEW: ISO C 9x
2752 llrintl NEW: ISO C 9x
2753 llround NEW: ISO C 9x
2754 llroundf NEW: ISO C 9x
2755 llroundl NEW: ISO C 9x
2760 lrintf NEW: ISO C 9x
2761 lrintl NEW: ISO C 9x
2762 lround NEW: ISO C 9x
2763 lroundf NEW: ISO C 9x
2764 lroundl NEW: ISO C 9x
2766 makecontext NEW: Unix98
2767 mempcpy NEW: GNU ext.
2770 modify_ldt NEW: kernel
2774 nearbyint NEW: ISO C 9x
2775 nearbyintf NEW: ISO C 9x
2776 nearbyintl NEW: ISO C 9x
2777 netname2host NEW: Secure RPC
2778 netname2user NEW: Secure RPC
2779 nexttoward NEW: ISO C 9x
2780 nexttowardf NEW: ISO C 9x
2781 nexttowardl NEW: ISO C 9x
2785 passwd2des NEW: Secure RPC
2787 pow10f NEW: GNU ext.
2788 pow10l NEW: GNU ext.
2791 printf_size NEW: GNU ext.
2792 printf_size_info NEW: GNU ext.
2793 profil_counter REMOVED
2794 pthread_mutexattr_getkind_np REPLACED
2795 pthread_mutexattr_setkind_np REPLACED
2796 ptsname NEW: Unix98 PTY
2797 ptsname_r NEW: Unix98 PTY
2799 putchar_locked REMOVED
2800 putgrent NEW: GNU ext.
2802 putpmsg NEW: STREAMS
2803 pututxline NEW: Unix98
2807 readdir64_r NEW: LFS
2808 remquo NEW: ISO C 9x
2809 remquof NEW: ISO C 9x
2810 remquol NEW: ISO C 9x
2812 roundf NEW: ISO C 9x
2813 roundl NEW: ISO C 9x
2815 scalbln NEW: ISO C 9x
2816 scalblnf NEW: ISO C 9x
2817 scalblnl NEW: ISO C 9x
2819 sendfile NEW: kernel
2820 setcontext NEW: Unix98
2821 setrlimit64 NEW: LFS
2822 setutxent NEW: Unix98
2824 sigignore NEW: Unix98
2825 sigqueue NEW: POSIX.1b
2826 sigrelse NEW: Unix98
2827 sigset NEW: POSIX.1b
2828 sigtimedwait NEW: POSIX.1b
2829 sigwaitinfo NEW: POSIX.1b
2830 sincos NEW: GNU ext.
2831 sincosf NEW: GNU ext.
2832 sincosl NEW: GNU ext.
2836 strcasestr NEW: GNU ext.
2837 strtoimax NEW: ISO C 9x
2838 strtoumax NEW: ISO C 9x
2839 strverscmp NEW: GNU ext.
2840 svcauthdes_stats NEW: Secure RPC
2841 svcunix_create NEW: sunrpc etx
2842 svcunixfd_create NEW: sunrpc ext
2843 swapcontext NEW: Unix98
2844 tcgetsid NEW: Unix98 PTY
2845 tdestroy NEW: GNU ext.
2846 tgamma NEW: ISO C 9x
2847 tgammaf NEW: ISO C 9x
2848 tgammal NEW: ISO C 9x
2852 truncf NEW: ISO C 9x
2853 truncl NEW: ISO C 9x
2855 unlockpt NEW: Unix98 PTY
2856 updwtmpx NEW: Unix98
2857 user2netname NEW: Secure RPC
2858 utmpxname NEW: Unix98
2859 versionsort NEW: GNU ext.
2860 versionsort64 NEW: GNU ext.
2862 wcscasecmp NEW: GNU ext.
2863 wcsncasecmp NEW: GNU ext.
2864 wcsnlen NEW: GNU ext.
2865 wcstoimax NEW: ISO C 9x
2866 wcstoll NEW: ISO C 9x
2867 wcstoull NEW: ISO C 9x
2868 wcstoumax NEW: ISO C 9x
2870 wordexp NEW: POSIX.2
2871 wordfree NEW: POSIX.2
2872 write_profiling REMOVED
2873 xdecrypt NEW: Secure RPC
2874 xdr_authdes_cred NEW: Secure RPC
2875 xdr_authdes_verf NEW: Secure RPC
2876 xdr_cryptkeyarg NEW: Secure RPC
2877 xdr_cryptkeyarg2 NEW: Secure RPC
2878 xdr_cryptkeyres NEW: Secure RPC
2879 xdr_getcredres NEW: Secure RPC
2880 xdr_key_netstarg NEW: Secure RPC
2881 xdr_key_netstres NEW: Secure RPC
2882 xdr_keybuf NEW: Secure RPC
2883 xdr_keystatus NEW: Secure RPC
2884 xdr_netnamestr NEW: Secure RPC
2885 xdr_sizeof NEW: Secure RPC
2886 xdr_unixcred NEW: sunrpc ext
2887 xencrypt NEW: Secure RPC
2888 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2899 * inet_ntoa is thread-safe
2901 * updwtmp is moved from libutil to libc
2903 * rewrite of cbrt function
2905 * update of timezone data
2919 * add atoll function
2921 * fix complex problems in Berkeley DB code
2923 * fix math functions
2927 * fixed lots of header problems (especially Linux/GNU specific)
2929 * dynamic loader preserves all registers
2931 * Roland McGrath provided support for handling of auxiliary objects in
2932 the ELF dynamic loader.
2934 * support for parallel builds is improved
2938 * GNU extensions are no longer declared by default. To enable them you
2939 must define the macro `_GNU_SOURCE' in your program or compile with
2942 * The library has changed from using GNU ld symbol aliases to using weak
2943 symbols where available. The ELF object file format supports weak
2944 symbols; GNU ld also supports weak symbols in the a.out format. (There
2945 is also now support for other GNU ld extensions in ELF. Use the
2946 `--with-elf' option to configure to indicate you have ELF, and
2947 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2948 of many files which contained only symbol aliases, reducing the size of
2949 the source and the compiled library; many other files were renamed to
2950 less cryptic names previously occupied by the symbol alias files.
2951 There is a new header file <elf.h> for programs which operate on
2952 files in the ELF format.
2954 * Converted to Autoconf version 2, so `configure' has more options.
2955 Run `configure --help' to see the details.
2957 * The library can now be configured to build profiling, highly-optimized
2958 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2959 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2960 `configure' enable building these extra libraries. The shared library is
2961 built by default when using both ELF and GNU ld. When shared libraries
2962 are enabled, the new library `-ldl' is available for arbitrary run-time
2963 loading of shared objects; its interface is defined in <dlfcn.h>. The
2964 new header file <link.h> gives access to the internals of the run-time
2965 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2966 application of same name on other systems and it provides information
2967 about dynamically linked binaries.
2969 * The C library now provides the run-time support code for profiling
2970 executables compiled with `-pg'. Programs can control the profiling code
2971 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2972 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2973 the support for this file format was contributed by David Mosberger-Tang.
2975 * The math code has been replaced with a math library based on fdlibm from
2976 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2977 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2978 functions. The math functions now reside in a separate library, so
2979 programs using them will need to use `-lm' their linking commands.
2981 * John C. Bowman contributed optimized ix87 assembler inline functions.
2983 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2984 mechanism similar to that found in Solaris 2. This is now used for the
2985 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2986 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2987 file controls what services are used for each individual database. This
2988 works by loading shared libraries with names specified in `nsswitch.conf',
2989 so service modules can be changed or added at any time without even
2990 relinking any program. Currently there are the file, db, and NIS based
2991 NSS services available.
2993 * The new functions `strtoq' and `strtouq' parse integer values from
2994 strings, like `strtol' and `strtoul', but they return `long long int' and
2995 `unsigned long long int' values, respectively (64-bit quantities).
2997 * The new functions `strtof' and `strtold' parse floating-point values from
2998 strings, like `strtod', but they return `float' and `long double' values,
2999 respectively (on some machines `double' and `long double' are the same).
3001 * Ulrich Drepper has contributed new implementations of the floating-point
3002 printing and reading code used in the `printf' family of functions and
3003 `strtod', `strtof', and `strtold'. These new functions are perfectly
3004 accurate, and much faster than the old ones.
3006 * The implementation of the POSIX locale model was completely rewritten by
3007 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3008 to compile the POSIX locale definition.
3010 * The former dummy implementations of the strcoll and strxfrm function are
3011 now replaced by fully functional code contributed by Ulrich Drepper. The
3012 collation information comes from the POSIX locale definitions.
3014 * The new header <langinfo.h> defines an interface for accessing
3015 various locale-dependent data (using the locale chosen with `setlocale').
3017 * Ulrich Drepper has contributed a new suite of functions for operation on
3018 wide-character and multibyte-character strings, in <wchar.h>;
3019 and classification and case conversion of wide characters, in <wctype.h>.
3020 These new functions are conforming to the ISO C, Amendement 1 specification.
3022 * There is now a second implementation of the standard I/O library available.
3023 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3024 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3026 * You can now use positional parameter specifications in format strings
3027 for the `printf' and `scanf' families of functions. For example,
3028 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3029 ``Number 6, Mr Jones''. This is mainly useful when providing different
3030 format strings for different languages, whose grammars may dictate
3031 different orderings of the values being printed. To support this
3032 feature, the interface for `register_printf_handler' has changed; see
3033 the header file <printf.h> for details.
3035 * The `printf' and `scanf' families of functions now understand a new
3036 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3037 to group numbers as indicated by the locale; for `scanf' and friends, this
3038 says to accept as valid only a number with all the proper grouping
3039 separators in the right places. In the default "C" locale, numbers are
3040 not grouped; but locales for specific countries will define the usual
3041 conventions (i.e. separate thousands with `,' in the US locale).
3043 * The pgrp functions have been regularized, slightly incompatibly but much
3044 less confusingly. The core functions are now `getpgid' and `setpgid',
3045 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3046 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3047 provided for compatibility. There is no longer an incompatible `getpgrp'
3048 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3050 * The new header file <fts.h> and suite of functions simplify programs that
3051 operate on directory trees. This code comes from 4.4 BSD.
3053 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3054 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3055 NSS scheme used in glibc.
3057 * There is a new malloc debugging hook `__memalign_hook'.
3059 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3060 `unsigned int' in <sys/types.h>. These are for compatibility only and
3061 their use is discouraged.
3063 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3064 done differently, so that it works even without GNU ld.
3066 * New function `euidaccess' checks allowed access to a file like `access',
3067 but using the effective IDs instead of the real IDs.
3069 * The time zone data files have been updated for the latest and greatest
3070 local time conventions of the countries of the world.
3072 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3075 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3076 for formatting floating-point numbers. They are provided only for
3077 compatibility; new programs should use `sprintf' instead. There are
3078 also equivalent function for the `long double' floating-point type and
3079 all functions also exist in a reentrant form.
3081 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3082 functions for maintaining the login-record files (primarily of use to
3083 system programs such as `login'), and convenient functions for
3084 allocating and initializing a pseudo-terminal (pty) device.
3086 * Ulrich Drepper has contributed new support for System V style
3087 shared memory and IPC on systems that support it.
3089 * Ulrich Drepper has contributed several miscellaneous new functions found
3090 in System V: The `hsearch' family of functions provide an effective
3091 implementation of hash tables; `a64l' and `l64a' provide a very simple
3092 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3095 * Ulrich Drepper has contributed new reentrant counterparts for the
3096 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3098 * Ulrich Drepper has contributed new, highly-optimized versions of several
3099 string functions for the i486/Pentium family of processors.
3101 * Ulrich Drepper has updated the Linux-specific code, based largely
3102 on work done in Hongjiu Lu's version of GNU libc for Linux.
3103 The GNU library now supports Linux versions 2.0.10 and later,
3104 using the ELF object file format (i[3456]86-*-linux).
3106 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3108 * David Mosberger-Tang and Richard Henderson have ported the C library
3109 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3110 dynamic linking support for ELF/Alpha.
3112 * Richard Henderson contributed several Alpha optimized assembler function
3113 for arithmetic and string handling.
3115 * Ulrich Drepper has contributed a new set of message catalog functions to
3116 support multiple languages using the <libintl.h> interface, for use with
3117 his new package GNU gettext. Translation volunteers have contributed
3118 catalogs of the library's messages in Spanish, German, and Korean.
3120 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3121 program and the `catgets' function for reading the catalog files it
3122 creates. (The <libintl.h> interface is preferred; we include the
3123 <nl_types.h> interface using `catgets' only for source compatibility with
3124 programs already written to use it.)
3126 * New header file <values.h> gives SVID-compatible names for <limits.h>
3129 * Various new macros, declarations, and small header files for compatibility
3132 * New function `group_member' is a convenient way to check if a process has
3133 a given effective group ID.
3135 * When using GCC 2.7 and later, the socket functions are now declared in a
3136 special way so that passing an argument of type `struct sockaddr_in *',
3137 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3138 `struct sockaddr *' type, does not generate a type-clash warning.
3140 * New function `error' declared in header file <error.h> is a convenient
3141 function for printing error messages and optionally exiting; this is the
3142 canonical function used in GNU programs. The new functions `err', `warn',
3143 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3144 doing the same thing.
3146 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3147 POSIX.2 `glob' function to do ~ and {...} expansion.
3149 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3150 `clearenv' which is used in POSIX.9 is also available.
3152 * New function `getsid' returns session ID number on systems that support it.
3154 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3155 files <db.h> and <mpool.h> provide a rich set of functions for several
3156 types of simple databases stored in memory and in files, and <ndbm.h> is
3157 an old `ndbm'-compatible interface using the `db' functions. Link with
3158 `-ldb' to get these functions.
3160 * New macro `strdupa' copies a string like `strdup', but uses local stack
3161 space from `alloca' instead of dynamic heap space from `malloc'.
3163 * New function `strnlen' is like `strlen' but searches only a given maximum
3164 number of characters for the null terminator. `stpncpy', `strndup' and
3165 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3168 * New function `statfs' in header <sys/statfs.h>.
3170 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3171 provide convenient functions for operating on blocks of null-terminated
3174 * A new suite of functions in <utmp.h> handle all the details of reading
3175 and writing the utmp file.
3177 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3180 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3181 completely POSIX compliant and also implemented the extended functionality
3182 to handle alternate digit representation and alternate era date formats.
3184 * Ulrich Drepper provided an implementation of the `strptime' function
3185 defined in XPG4.2 which transforms a string into a `struct tm' value.
3187 * Paul Eggert provided the tzselect shell script as part of the timezone
3188 code. The shell script makes it easy to select the correct timezone
3191 * The implementation of the malloc family of functions is completely replaced
3192 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3193 The implementation uses the mmap function (if available) and it is
3194 optimized for the use in multi threaded programs.
3196 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3197 functions. This new functionality is usable by specifying a special
3198 salt string and it is compatible with implementation on *BSD systems.
3200 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3201 `getsubopt' to handle second level command line options, `bsd_signal'
3202 to access BSD style `signal' functionality, the obsolete `regexp' style
3205 * the `lchown' function is available on system which support this
3208 * The implementation of the shadow password handling function was contributed
3211 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3213 * POSIX.1g support was added. The <sys/select.h> header is available,
3214 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3215 implementation of `getaddrinfo'.
3219 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3221 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3222 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3224 * The new function `daemon' from 4.4 BSD is useful for server programs that
3225 want to put themselves in the background.
3227 * Joel Sherrill has contributed support for several standalone boards that
3228 run without an operating system.
3230 * `printf', `scanf' and friends now accept a `q' type modifier for long
3231 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3233 * All of the code taken from BSD (notably most of the math and networking
3234 routines) has been updated from the BSD 4.4-Lite release.
3236 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3238 * The new functions `getdomainname' and `setdomainname' fetch or change the
3239 YP/NIS domain name. These are system calls which exist on systems which
3242 * The time zone data files have been updated for the latest international
3245 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3246 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3250 * The C library now includes support for Sun RPC, from Sun's free
3251 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3252 are included. (There is still no support for YP.)
3254 * Tom Quinn has contributed a port of the C library to SGI machines running
3255 Irix 4 (mips-sgi-irix4).
3257 * The new `lockf' function is a simplified interface to the locking
3258 facilities of `fcntl', included for compatibility.
3260 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3262 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3264 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3267 * The error message printed by `assert' for a failed assertion now includes
3268 the name of the program (if using GNU ld) and the name of the calling
3269 function (with versions of GCC that support this).
3271 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3273 * The library now includes the <sys/mman.h> header file and memory
3274 management functions `mmap', `munmap', `mprotect', `msync', and
3275 `madvise', on systems that support those facilities.
3277 * The interface for `mcheck' has changed slightly: the function called to
3278 abort the program when an allocation inconsistency is detected now takes
3279 an argument that indicates the type of failure. The new function
3280 `mprobe' lets you request a consistency check for a particular block at
3281 any time (checks are normally done only when you call `free' or `realloc'
3284 * It is now possible to easily cross-compile the C library, building on one
3285 system a library to run on another machine and/or operating system. All
3286 you need to do is set the variable `HOST_CC' in `configparms' to the
3287 native compiler for programs to run on the machine you are building on (a
3288 few generator programs are used on Unix systems); set `CC' to the
3291 * The new function `fexecve' (only implemented on the GNU system) executes
3292 a program file given a file descriptor already open on the file.
3296 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3297 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3299 * You can set the variable `libprefix' in `configparms' to specify a prefix
3300 to be prepended to installed library files; this makes it easy to install
3301 the GNU C library to be linked as `-lgnuc' or whatever.
3303 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3304 copies a limited number of characters from a string, and returns the
3305 address of the last character written.
3307 * You no longer need to check for whether the installed `stddef.h' is
3308 compatible with the GNU C library. configure now checks for you.
3310 * You can now define a per-stream `fileno' function to convert the
3311 stream's cookie into an integral file descriptor.
3313 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3314 allocates zero bytes of storage, and returns a unique pointer which
3315 you can pass to `realloc' or `free'. The behavior is undefined if
3316 you dereference this pointer.
3318 * The C library now runs on Sony NEWS m68k machines running either
3319 NewsOS 3 or NewsOS 4.
3321 * The new `syscall' function is a system-dependent primitive function
3322 for invoking system calls. It has the canonical behavior on Unix
3323 systems, including unreliable return values for some calls (such as
3324 `pipe', `fork' and `getppid').
3326 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3327 to `EAGAIN', which is the preferred name. On systems whose kernels
3328 use two distinct codes, the C library now translates EWOULDBLOCK to
3329 EAGAIN in every system call function.
3333 * The GNU C Library Reference Manual is now distributed with the library.
3334 `make dvi' will produce a DVI file of the printed manual.
3335 `make info' will produce Info files that you can read on line using C-h i
3336 in Emacs or the `info' program.
3337 Please send comments on the manual to bug-glibc-manual@gnu.org.
3339 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3341 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3343 * Jason Merrill has contributed a port to the Sequent Symmetry running
3344 Dynix version 3 (i386-sequent-dynix).
3346 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3347 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3349 * New function `memory_warnings' lets you arrange to get warnings when
3350 malloc is running out of memory to allocate, like Emacs gives you.
3352 * The C library now contains the relocating allocator used in Emacs 19 for
3353 its editing buffers. This allocator (ralloc) minimizes allocation
3354 overhead and fragmentation by moving allocated regions around whenever it
3355 needs to. You always refer to a ralloc'd region with a "handle" (a
3356 pointer to a pointer--an object of type `void **').
3358 * There is a new `printf' format: `%m' gives you the string corresponding
3359 to the error code in `errno'.
3361 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3362 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3363 pass, the `a' modifier says to fill in a `char **' you pass with a
3366 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3367 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3368 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3370 * `mkstemp' is a traditional Unix function to atomically create and open a
3371 uniquely-named temporary file.
3375 * The standard location for the file that says what the local timezone is
3376 has changed again. It is now `/usr/local/etc/localtime' (or more
3377 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3379 * The distribution no longer contains any files with names longer than 14
3382 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3383 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3385 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3389 * The configuration process has changed quite a bit. The `configure'
3390 script is now used just like the configuration scripts for other GNU
3391 packages. The `sysdeps' directory hierarchy is much rearranged.
3392 The file `INSTALL' explains the new scheme in detail.
3394 * The header files no longer need to be processed into ANSI C and
3395 traditional C versions. There is just one set of files to install, and
3396 it will work with ANSI or old C compilers (including `gcc -traditional').
3398 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3399 MIPS DECStation running Ultrix 4.
3401 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3402 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3403 made itself into a shared library.
3405 * Yet further improved support for the i386, running 4.3 BSD-like systems
3406 (such as Mach 3 with the Unix single-server), or System V.
3408 * New function `strncasecmp' to do case-insensitive string comparison
3409 with limited length.
3411 * New function `strsep' is a reentrant alternative to `strtok'.
3413 * New functions `scandir' and `alphasort' for searching directories.
3415 * New function `setenv' is a better interface to `putenv'.
3417 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3418 function for traversing a directory tree.
3420 * The GNU obstack package is now also part of the C library.
3421 The new function `open_obstack_stream' creates a stdio stream that
3422 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3423 formatted output directly to an obstack.
3425 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3426 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3428 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3430 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3431 things to your strings.
3433 * There are some new test programs: test-fseek, testmb, and testrand.
3435 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3436 These ports are not finished, but are a good starting place for really
3437 supporting those systems.
3439 * `/etc/localtime' is now the standard location for the file that says what
3440 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3441 This follows the general principle that `/etc' is the place for all local
3442 configuration files.
3444 * The C library header files now use `extern "C"' when used by the C++
3445 compiler, so the C library should now work with C++ code.
3447 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3448 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3451 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3452 function which uses the `merge sort' algorithm, and is said to be
3453 significantly faster than the old GNU `qsort' function. Merge sort is
3454 now the standard `qsort' function. The new algorithm can require a lot
3455 of temporary storage; so, the old sorting function is called when the
3456 required storage is not available.
3458 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3459 provides the Unix `crypt' function, plus some other entry points.
3461 * The code and header files taken from 4.4 BSD have been updated with the
3462 latest files released from Berkeley.
3464 ----------------------------------------------------------------------
3465 Copyright information:
3467 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3469 Permission is granted to anyone to make or distribute verbatim copies
3470 of this document as received, in any medium, provided that the
3471 copyright notice and this permission notice are preserved,
3472 thus giving the recipient permission to redistribute in turn.
3474 Permission is granted to distribute modified versions
3475 of this document, or of portions of it,
3476 under the above conditions, provided also that they
3477 carry prominent notices stating who last changed them.
3480 version-control: never