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 - Signaling NaN macros: SNANF, SNAN, SNANL.
56 - Comparison macros: iseqsig.
58 - Classification macros: iscanonical, issubnormal, iszero.
60 - Total order functions: totalorder, totalorderf, totalorderl,
61 totalordermag, totalordermagf, totalordermagl.
63 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
65 - NaN functions: getpayload, getpayloadf, getpayloadl.
67 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
68 are added to libc. They convert a floating-point number into string.
70 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
71 for the Linux quota interface which predates kernel version 2.4.22 has
74 * The malloc_get_state and malloc_set_state functions have been removed.
75 Already-existing binaries that dynamically link to these functions will
76 get a hidden implementation in which malloc_get_state is a stub. As far
77 as we know, these functions are used only by GNU Emacs and this change
78 will not adversely affect already-built Emacs executables. Any undumped
79 Emacs executables, which normally exist only during an Emacs build, should
80 be rebuilt by re-running “./configure; make” in the Emacs build tree.
82 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
83 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
84 “no-ip6-dotint” had already been the default, and support for the
85 “ip6-dotint” option was removed from the Internet in 2006.
87 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
88 flag from <resolv.h> have been removed. The option relied on a
89 backwards-incompatible DNS extension which was never deployed on the
92 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
93 in the <resolv.h> header file have been deprecated. They were already
96 * DNSSEC-related declarations and definitions have been removed from the
97 <arpa/nameser.h> header file, and libresolv will no longer attempt to
98 decode the data part of DNSSEC record types. Previous versions of glibc
99 only implemented minimal support for the previous version of DNSSEC, which
100 is incompatible with the currently deployed version.
102 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
103 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
104 <arpa/nameser.h> header file because the distinction between RR types and
105 meta-RR types is not officially standardized, subject to revision, and
106 thus not suitable for encoding in a macro.
108 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
109 and rhook members of the res_state type in <resolv.h> have been removed.
110 The glibc stub resolver did not support these hooks, but the header file
111 did not reflect that.
113 * For multi-arch support it is recommended to use a GCC which has
114 been built with support for GNU indirect functions. This ensures
115 that correct debugging information is generated for functions
116 selected by IFUNC resolvers. This support can either be enabled by
117 configuring GCC with '--enable-gnu-indirect-function', or by
118 enabling it by default by setting 'default_gnu_indirect_function'
119 variable for a particular architecture in the GCC source file
122 Security related changes:
124 On ARM EABI (32-bit), generating a backtrace for execution contexts which
125 have been created with makecontext could fail to terminate due to a
126 missing .cantunwind annotation. This has been observed to lead to a hang
127 (denial of service) in some Go applications compiled with gccgo. Reported
128 by Andreas Schwab. (CVE-2016-6323)
130 The following bugs are resolved with this release:
132 [The release manager will add the list generated by
133 scripts/list-fixed-bugs.py just before the release.]
137 * The minimum Linux kernel version that this version of the GNU C Library
138 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
139 kernel version 2.6.32 or later suffices (on architectures that already
140 required kernel versions more recent than 3.2, those requirements remain
141 unchanged). Linux 3.2 or later kernel headers are required on all
144 * The pap_AN locale has been deleted. This has been deprecated for a long
145 time. It has been replaced by pap_AW & pap_CW, both of which have long
146 been included in previous releases.
148 * The readdir_r and readdir64_r functions have been deprecated. It is
149 recommended to use readdir and readdir64 instead.
151 * The type “union wait” has been removed. It was deprecated in the early
152 1990s and never part of POSIX. Application code should use the int type
153 instead of “union wait”.
155 * A new NSS action is added to facilitate large distributed system
156 administration. The action, MERGE, allows remote user stores like LDAP
157 to be merged into local user stores like /etc/groups in order to provide
158 easy to use, updated, and managed sets of merged credentials. The new
159 action can be used by configuring it in /etc/nsswitch.conf:
160 group: files [SUCCESS=merge] nis
161 Implemented by Stephen Gallagher (Red Hat).
163 * The deprecated __malloc_initialize_hook variable has been removed from the
166 * The long unused localedef --old-style option has been removed. It hasn't
167 done anything in over 16 years. Scripts using this option can safely
170 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
171 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
172 return the next representable value in the direction of positive infinity
173 and the nextdown functions return the next representable value in the
174 direction of negative infinity. These are currently enabled as GNU
177 Security related changes:
179 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
180 could result in a stack overflow when getnetbyname was called with an
181 overly long name. (CVE-2016-3075)
183 * Previously, getaddrinfo copied large amounts of address data to the stack,
184 even after the fix for CVE-2013-4458 has been applied, potentially
185 resulting in a stack overflow. getaddrinfo now uses a heap allocation
186 instead. Reported by Michael Petlan. (CVE-2016-3706)
188 * The glob function suffered from a stack-based buffer overflow when it was
189 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
190 Reported by Alexander Cherepanov. (CVE-2016-1234)
192 * The Sun RPC UDP client could exhaust all available stack space when
193 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
194 alloca plugin for GCC. (CVE-2016-4429)
196 * The IPv6 name server management code in libresolv could result in a memory
197 leak for each thread which is created, performs a failing naming lookup,
198 and exits. Over time, this could result in a denial of service due to
199 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
201 The following bugs are resolved with this release:
203 [1170] localedata: ne_NP: update Nepali locale definition file
204 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
206 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
207 [6796] math: fdim() does not set errno on overflow
208 [10354] libc: posix_spawn should use vfork() in more cases than presently
209 [11213] localedata: localedata: add copyright disclaimer to locale files
210 [12143] localedata: chr_US: new Cherokee locale
211 [12450] localedata: sgs_LT: new locale
212 [12676] localedata: ln_CD: new locale
213 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
215 [13304] math: fma, fmaf, fmal produce wrong results
216 [14259] build: --localedir arg to configure is ignored
217 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
218 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
219 [14934] localedata: es_CL: wrong first weekday chilean locale
220 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
222 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
224 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
225 [15368] nptl: raise() is not async-signal-safe
226 [15479] math: ceil, floor, round and trunc raise inexact exception
227 [15578] localedata: kk_KZ: various updates
228 [16003] localedata: pap_AN: punt old locale
229 [16137] localedata: iw_IL: punt old locale
230 [16190] localedata: eo: new esperanto locale
231 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
232 [16742] malloc: race condition: pthread_atfork() called before first
233 malloc() results in unexpected locking behaviour/deadlocks
234 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
236 [16983] localedata: postal_fmt does not allow %l and %n modifiers
237 [17565] localedata: pt_PT: wrong (work-)week start
238 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
239 [17950] build: Build fails with -msse
240 [18205] localedata: be_BY*: wrong first_weekday and first_workday
241 [18433] libc: posix_spawn does not return correctly upon failure to
243 [18453] localedata: charmaps/IBM875: incorrect codes
244 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
246 [18896] localedata: he_IL: improvements for currency
247 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
249 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
251 [19056] libc: Deprecate readdir_r
252 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
254 [19198] localedata: nl_NL: small improvements for Dutch locales
255 [19257] network: Per-thread memory leak in __res_vinit with IPv6
256 nameservers (CVE-2016-5417)
257 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
259 [19400] locale: Language missing in "iso-639.def", trivial fix in
261 [19431] malloc: Deadlock between fflush, getdelim, and fork
262 [19505] libc: Incorrect file descriptor validity checks in
263 posix_spawn_file_actions_add{open,close,dup2}
264 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
266 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
267 `intl/{gettextP,loadinfo}.h'
268 [19534] libc: execle, execlp may use malloc
269 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
270 [19573] network: res_nclose and __res_maybe_init disagree about name
271 server initialization, breaking Hesiod
272 [19575] localedata: Status of GB18030 tables
273 [19581] localedata: sr_* date_fmt string contains additional newline
274 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
276 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
277 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
278 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
279 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
281 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
283 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
285 [19610] dynamic-link: ldconfig -X removes stale symbolic links
286 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
287 [19633] locale: strfmon_l applies global locale to number formatting
288 [19642] network: Memory leak in getnameinfo
289 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
290 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
292 [19654] math: [x86_64] Need testcase for BZ #19590 fix
293 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
295 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
296 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
298 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
300 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
302 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
303 pointers and lengths in error-case.
304 [19727] locale: Converting from/to UTF-xx with iconv() does not always
305 report errors on UTF-16 surrogates values.
306 [19755] nscd: nscd assertion failure in gc
307 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
308 [19759] libc: mempcpy shouldn't be inlined
309 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
310 [19765] libc: s390 needs an optimized mempcpy
311 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
312 NAME_MAX limit assumption (CVE-2016-1234)
313 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
314 [19787] network: Missing and incorrect truncation checks in getnameinfo
315 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
317 [19791] network: Assertion failure in res_query.c with un-connectable name
319 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
320 [19822] math: libm.so install clobbers old version
321 [19825] network: resolv: send_vc can return uninitialized data in second
322 response to getaddrinfo
323 [19830] network: nss_dns: should check RDATA length against buffer length
324 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
325 confronted with A/AAAA records of invalid size
326 [19837] nss: nss_db: No retries for some long lines with a larger buffer
327 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
328 [19853] stdio: Printing IBM long double in decimal with high precision is
330 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
331 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
332 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
334 [19865] network: Assertion failure or memory leak in
335 _nss_dns_getcanonname_r
336 [19868] network: nss_dns: netent code does not skip over non-PTR records
337 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
339 [19881] string: Improve x86-64 memset
340 [19907] string: Incorrect memcpy tests
341 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
343 [19925] libc: termios.h XCASE namespace
344 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
345 [19929] libc: limits.h NL_NMAX namespace
346 [19931] stdio: Memory leak in vfprintf
347 [19957] libc: clone(CLONE_VM) access invalid parent memory
348 [19963] localedata: en_IL: New locale
349 [19989] stdio: stdio.h cuserid namespace
350 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
352 [19996] locale: langinfo.h nl_langinfo_l namespace
353 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
354 [20010] network: getaddrinfo: Stack overflow in hostent translation
356 [20012] stdio: libio: fmemopen append mode failure
357 [20014] stdio: stdio.h namespace for pre-threads POSIX
358 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
359 [20023] libc: fcntl.h timespec namespace
360 [20024] math: [x86_64] vectorized sincos trashes the stack
361 [20031] network: nss_hesiod: Heap overflow in get_txt_records
362 [20041] time: sys/time.h timespec namespace
363 [20043] libc: unistd.h missing cuserid for UNIX98 and before
364 [20044] libc: unistd.h missing pthread_atfork for UNIX98
365 [20051] libc: ttyslot in wrong header under wrong conditions
366 [20054] libc: gethostname not declared for XPG4
367 [20055] libc: termios.h missing tcgetsid for XPG4
368 [20072] dynamic-link: x86 init_cpu_features is called twice in static
370 [20073] libc: sys/stat.h fchmod namespace
371 [20074] libc: stdlib.h rand_r namespace
372 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
373 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
375 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
376 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
378 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
379 [20119] libc: Wrong mask for processors level type from CPUID
380 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
381 AS not supporting AVX512
382 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
384 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
385 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
387 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
388 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
389 [20178] libc: posix_spawn{p} should not call exit
390 [20191] stdio: libio: vtables hardening
391 [20195] string: FMA4 detection requires CPUID execution with register
393 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
394 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
396 [20212] math: acos (sNaN) returns sNaN
397 [20213] math: asin (sNaN) returns sNaN
398 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
399 [20218] math: [i386] asinhl (sNaN) returns sNaN
400 [20219] math: [i386] atanhl (sNaN) returns sNaN
401 [20222] stdio: fopencookie: Mangle function pointers
402 [20224] math: [i386] cbrtl (sNaN) returns sNaN
403 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
404 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
406 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
407 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
408 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
409 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
410 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
411 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
412 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
413 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
414 [20240] math: modf (sNaN) returns sNaN
415 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
416 [20250] math: frexp (sNaN) returns sNaN
417 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
418 [20255] math: [i386] fdim, fdimf return with excess range and precision /
420 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
421 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
422 subscript is below array bounds [-Werror=array-bounds]
423 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
424 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
426 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
427 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
429 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
431 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
432 [20316] localedata: id_ID: Februari instead of Pebruari
433 [20327] string: POWER8 strcasecmp returns incorrect result
434 [20347] math: Failure: Test: j0_downward (0xap+0)
435 [20348] libc: FAIL: misc/tst-preadvwritev64
436 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
437 [20350] libc: There is no test for p{read,write}64
438 [20357] math: Incorrect cos result for 1.5174239687223976
439 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
443 * Unicode 8.0.0 Support: Character encoding, character type info, and
444 transliteration tables are all updated to Unicode 8.0.0, using new
445 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
446 These updates cause user visible changes, such as the fixes for bugs
447 89, 16061, and 18568.
449 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
450 kernel-internal CPU set size. This means that requests that change the
451 CPU affinity which failed before (for example, an all-ones CPU mask) will
452 now succeed. Applications that need to determine the effective CPU
453 affinities need to call sched_getaffinity or pthread_getaffinity_np after
454 setting it because the kernel can adjust it (and the previous size check
455 would not detect this in the majority of cases).
457 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
458 the following new symbols are used: fts64_children, fts64_close,
459 fts64_open, fts64_read and fts64_set.
461 * getaddrinfo now detects certain invalid responses on an internal netlink
462 socket. If such responses are received, an affected process will
463 terminate with an error message of "Unexpected error <number> on netlink
464 descriptor <number>" or "Unexpected netlink response of size <number> on
465 descriptor <number>". The most likely cause for these errors is a
466 multi-threaded application which erroneously closes and reuses the netlink
467 file descriptor while it is used by getaddrinfo.
469 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
470 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
471 unnecessary serialization of memory allocation requests across threads.
472 The defect is now corrected. Users should see a substantial increase in
473 the concurent throughput of allocation requests for applications which
474 trigger this bug. Affected applications typically create and
475 destroy threads frequently. (Bug 19048 was reported and analyzed by
478 * There is now a --disable-timezone-tools configure option for disabling the
479 building and installing of the timezone related utilities (zic, zdump, and
480 tzselect). This is useful for people who build the timezone data and code
481 independent of the GNU C Library.
483 * The obsolete header <regexp.h> has been removed. Programs that require
484 this header must be updated to use <regex.h> instead.
486 * The obsolete functions bdflush, create_module, get_kernel_syms,
487 query_module and uselib are no longer available to newly linked binaries;
488 the header <sys/kdaemon.h> has been removed. These functions and header
489 were specific to systems using the Linux kernel and could not usefully be
490 used with the GNU C Library on systems with version 2.6 or later of the
493 * Optimized string, wcsmbs and memory functions for IBM z13.
494 Implemented by Stefan Liebler.
496 * Newly linked programs that define a variable called signgam will no longer
497 have it set by the lgamma, lgammaf and lgammal functions. Programs that
498 require signgam to be set by those functions must ensure that they use the
499 variable provided by the GNU C Library and declared in <math.h>, without
500 defining their own copy.
502 * The minimum GCC version that can be used to build this version of the GNU
503 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
504 still be used to compile programs using the GNU C Library.
506 Security related changes:
508 * An out-of-bounds value in a broken-out struct tm argument to strftime no
509 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
511 * The LD_POINTER_GUARD environment variable can no longer be used to disable
512 the pointer guard feature. It is always enabled. Previously,
513 LD_POINTER_GUARD could be used to disable security hardening in binaries
514 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
517 * An integer overflow in hcreate and hcreate_r could lead to an
518 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
520 * The catopen function no longer has unbounded stack usage. Reported by
523 * The nan, nanf and nanl functions no longer have unbounded stack usage
524 depending on the length of the string passed as an argument to the
525 functions. Reported by Joseph Myers. (CVE-2014-9761)
527 * A stack-based buffer overflow was found in libresolv when invoked from
528 libnss_dns, allowing specially crafted DNS responses to seize control
529 of execution flow in the DNS client. The buffer overflow occurs in
530 the functions send_dg (send datagram) and send_vc (send TCP) for the
531 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
532 family. The use of AF_UNSPEC triggers the low-level resolver code to
533 send out two parallel queries for A and AAAA. A mismanagement of the
534 buffers used for those queries could result in the response of a query
535 writing beyond the alloca allocated buffer created by
536 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
537 the overflow. Thanks to the Google Security Team and Red Hat for
538 reporting the security impact of this issue, and Robert Holiday of
539 Ciena for reporting the related bug 18665. (CVE-2015-7547)
541 The following bugs are resolved with this release:
543 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
544 [887] math: Math library function "logb" and "nextafter" inconsistent
545 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
546 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
547 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
548 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
550 [4404] localedata: German translation of "Alarm clock" is misleading
551 [6799] math: nextafter() and nexttoward() doen't set errno on
552 overflow/underflow errors
553 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
555 [10432] nis: _nss_nis_setnetgrent assertion failure
556 [11460] libc: fts has no LFS support
557 [12926] network: getaddrinfo()/make_request() may spin forever
558 [13065] nptl: Race condition in pthread barriers
559 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
560 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
562 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
563 [14912] libc: Rename non-installed bits/*.h headers
564 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
565 [15367] math: Let gcc use __builtin_isinf
566 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
567 [15421] math: lgamma wrongly sets signgam for ISO C
568 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
569 FE_INVALID with argument out of range
570 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
572 [15786] dynamic-link: ifunc resolver functions can smash function
574 [15918] math: Unnecessary check for equality in hypotf()
575 [16061] localedata: Review / update transliteration data
576 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
578 [16141] time: strptime %z offset restriction
579 [16171] math: drem should be alias of remainder
580 [16296] math: fegetround is pure?
581 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
582 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
584 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
585 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
587 [16422] math: [powerpc] math-float, math-double failing llrint tests with
588 "Exception "Inexact" set" on ppc32
589 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
590 [16517] math: Missing underflow exception from tanf/tan/tanl
591 [16519] math: Missing underflow exception from sinhf
592 [16520] math: Missing underflow exception from tanhf
593 [16521] math: Missing underflow exception from exp2
594 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
596 [16734] stdio: fopen calls mmap to allocate its buffer
597 [16961] math: nan function incorrect handling of bad sequences
598 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
599 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
600 [16985] locale: localedef: confusing error message when opening output
602 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
603 [17197] locale: Redundant shift character in iconv conversion output at
605 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
606 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
607 [17250] dynamic-link: static linking breaks nss loading
608 (getaddrinfo/getpwnam/etc...)
609 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
611 [17441] math: isnan() should use __builtin_isnan() in GCC
612 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
613 (related to lock elision)
614 [17787] manual: Exponent on page 324 of the PDF ends prematurely
615 [17886] time: strptime should be able to parse "Z" as a timezone with %z
616 [17887] time: strptime should be able to parse "+01:00" style timezones
617 [17905] libc: catopen() Multiple unbounded stack allocations
619 [18084] libc: backtrace (..., 0) dumps core on x86
620 [18086] libc: nice() sets errno to 0 on success
621 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
622 is too large (CVE-2015-8778)
623 [18251] dynamic-link: SONAME missing when audit modules provides path
624 [18265] libc: add attributes for wchar string and memory functions
625 [18370] math: csqrt missing underflows
626 [18421] libc: [hppa] read-only segment has dynamic relocations
627 [18472] libc: Obsolete syscall wrappers should be compat symbols
628 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
629 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
630 [18525] localedata: Remove locale timezone information
631 [18560] libc: [powerpc] spurious bits/ipc.h definitions
632 [18568] localedata: Update locale data to Unicode 8.0
633 [18589] locale: sort-test.sh fails at random
634 [18595] math: ctan, ctanh missing underflows
635 [18604] libc: assert macro-expands its argument
636 [18610] math: S390: fetestexcept() reports any exception if DXC-code
637 contains a vector instruction exception.
638 [18611] math: j1, jn missing errno setting on underflow
639 [18618] localedata: sync Chechen locale definitions with other *_RU
641 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
642 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
643 [18665] network: In send_dg, the recvfrom function is NOT always using the
644 buffer size of a newly created buffer (CVE-2015-7547)
645 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
647 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
649 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
650 [18699] math: tilegx cproj() for various complex infinities does not yield
652 [18724] libc: Harden put*ent functions against data injection
653 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
654 [18755] build: build errors with -DNDEBUG
655 [18757] stdio: fmemopen fails to set errno on failure
656 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
658 [18781] libc: openat64 lacks O_LARGEFILE
659 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
660 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
661 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
662 [18790] math: [ldbl-128ibm] tanhl inaccurate
663 [18795] libc: stpncpy fortification misses buffer lengths that are
665 [18796] build: build fails for --disable-mathvec
666 [18803] math: hypot missing underflows
667 [18820] stdio: fmemopen may leak memory on failure
668 [18823] math: csqrt spurious underflows
669 [18824] math: fma spurious underflows
670 [18825] math: pow missing underflows
671 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
672 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
673 [18870] build: sem_open.c fails to compile with missing symbol
675 [18872] stdio: Fix memory leak in printf_positional
676 [18873] libc: posix_fallocate overflow check ineffective
677 [18875] math: Excess precision leads incorrect libm
678 [18877] libc: arm: mmap offset regression
679 [18887] libc: memory corruption when using getmntent on blank lines
680 [18918] localedata: hu_HU: change time to HH:MM:SS format
681 [18921] libc: Regression: extraneous stat() and fstat() performed by
683 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
684 binaries (CVE-2015-8777)
685 [18951] math: tgamma missing underflows
686 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
688 [18953] localedata: lt_LT: change currency symbol to the euro
689 [18956] math: powf inaccuracy
690 [18961] math: [i386] exp missing underflows
691 [18966] math: [i386] exp10 missing underflows
692 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
693 [18969] build: multiple string test failures due to missing locale
695 [18970] libc: Reference of pthread_setcancelstate in libc.a
696 [18977] math: float / long double Bessel functions not in XSI POSIX
697 [18980] math: i386 libm functions return with excess range and precision
698 [18981] math: i386 scalb*, ldexp return with excess range and precision
699 [18982] stdio: va_list and vprintf
700 [18985] time: Passing out of range data to strftime() causes a segfault
702 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
703 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
704 [19012] locale: iconv_open leaks memory on error path
705 [19016] math: clog, clog10 inaccuracy
706 [19018] nptl: Mangle function pointers in tls_dtor_list
707 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
708 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
709 [19048] malloc: malloc: arena free list can become cyclic, increasing
711 [19049] math: [powerpc] erfc incorrect zero sign
712 [19050] math: [powerpc] log* incorrect zero sign
713 [19058] math: [x86_64] Link fail with -fopenmp and -flto
714 [19059] math: nexttoward overflow incorrect in non-default rounding modes
715 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
716 [19074] network: Data race in _res_hconf_reorder_addrs
717 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
718 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
719 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
721 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
723 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
724 [19086] manual: posix_fallocate64 documented argument order is wrong.
725 [19088] math: lround, llround missing exceptions close to overflow
727 [19094] math: lrint, llrint missing exceptions close to overflow threshold
728 [19095] math: dbl-64 lrint incorrect for 64-bit long
729 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
730 [19124] dynamic-link: ld.so failed to build with older assmebler
731 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
732 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
733 [19134] math: [powerpc32] lround, lroundf spurious exceptions
734 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
735 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
736 pthread_setaffinity_np
737 [19156] math: [ldbl-128] j0l spurious underflows
738 [19164] nptl: tst-getcpu fails with many possible CPUs
739 [19168] math: math/test-ildoubl and math/test-ldouble failure
740 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
741 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
743 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
744 (FE_NOMASK_ENV) do not clear SSE exceptions
745 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
746 _int_new_arena/reused_arena
747 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
748 [19201] math: dbl-64 remainder incorrect sign of zero result
749 [19205] math: bits/math-finite.h conditions do not match math.h and
751 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
752 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
753 for C99-based standards
754 [19212] libc: features.h not -Wundef clean
755 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
757 [19214] libc: Family and model identification for AMD CPU's are incorrect.
758 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
759 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
761 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
763 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
765 [19242] libc: strtol incorrect in Turkish locales
766 [19243] malloc: reused_arena can pick an arena on the free list, leading
767 to an assertion failure and reference count corruption
768 [19253] time: tzset() ineffective when temporary TZ did not include DST
770 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
771 [19270] math: [hppa] Shared libm missing __isnanl
772 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
773 MAP_HUGETLB and MAP_STACK defines
774 [19313] nptl: Wrong __cpu_mask for x32
775 [19347] libc: grantpt: try to force a specific gid even without pt_chown
776 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
777 [19350] math: [ldbl-128ibm] sinhl spurious overflows
778 [19351] math: [ldbl-128ibm] logl inaccurate near 1
779 [19363] time: x32: times() return value wrongly truncates/sign extends
781 [19367] dynamic-link: Improve branch prediction on Silvermont
782 [19369] network: Default domain name not reset by res_ninit when "search"
783 / "domain" entry is removed from resolv.conf
784 [19375] math: powerpc: incorrect results for POWER7 logb with negative
786 [19385] localedata: bg_BG: time separator should be colon, not comma
787 [19408] libc: linux personality syscall wrapper may erroneously return an
788 error on 32-bit architectures
789 [19415] libc: dladdr returns wrong names on hppa
790 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
791 IBM905, IBM907, and IBM909
792 [19439] math: Unix98 isinf and isnan functions conflict with C++11
793 [19443] build: build failures with -DDEBUG
794 [19451] build: Make check fails on test-double-vlen2
795 [19462] libc: Glibc failed to build with -Os
796 [19465] math: Wrong code with -Os
797 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
799 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
801 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
802 [19486] math: S390: Math tests fail with "Exception Inexact set".
803 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
804 [19550] libc: [mips] mmap negative offset handling inconsistent with other
806 [19590] math: Fail to build shared objects that use libmvec.so functions.
810 * The following bugs are resolved with this release:
812 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
813 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
814 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
815 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
816 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
817 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
818 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
819 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
820 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
821 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
822 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
823 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
824 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
825 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
826 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
827 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
828 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
829 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
830 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
831 18657, 18676, 18694, 18696, 18887.
833 * Cache information can be queried via sysconf() function on s390 e.g. with
834 _SC_LEVEL1_ICACHE_SIZE as argument.
836 * A buffer overflow in gethostbyname_r and related functions performing DNS
837 requests has been fixed. If the NSS functions were called with a
838 misaligned buffer, the buffer length change due to pointer alignment was
839 not taken into account. This could result in application crashes or,
840 potentially arbitrary code execution, using crafted, but syntactically
841 valid DNS responses. (CVE-2015-1781)
843 * The time zone file parser has been made more robust against crafted time
844 zone files, avoiding heap buffer overflows related to the processing of
845 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
846 large time zone data files. Overly long time zone specifiers in the TZ
847 variable no longer result in stack overflows and crashes.
849 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
850 for LD and GD on x86 and x86-64, has been implemented. You will need
851 binutils-2.24 or later to enable this optimization.
853 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
854 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
855 Hat). These updates cause user visible changes, such as the fix for bug
858 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
859 and getXXbyYY NSS calls for the same database, causing a denial-of-service
860 condition in some applications.
862 * Added vector math library named libmvec with the following vectorized x86_64
863 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
865 The library can be disabled with --disable-mathvec. Use of the functions is
866 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
867 Shared library libmvec.so is linked in as needed when using -lm (no need to
868 specify -lmvec explicitly for not static builds).
869 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
871 * A new fmemopen implementation has been added with the goal of POSIX
872 compliance. The new implementation fixes the following long-standing
873 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
874 old implementation is still present for use be by existing binaries.
876 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
877 releases. It has been fixed to match 2.19 and older, but binaries built
878 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
880 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
881 Contributed by Roland McGrath (Google).
883 * The header <regexp.h> is deprecated, and will be removed in a future
884 release. Use of this header will trigger a deprecation warning.
885 Application developers should update their code to use <regex.h> instead.
887 This header was formerly part of SUS, but was deprecated in 1994 and
888 removed from the standard in 2001. Also, the glibc implementation
889 leaks memory. See BZ#18681 for more details.
893 * The following bugs are resolved with this release:
895 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
896 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
897 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
898 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
899 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
900 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
901 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
902 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
903 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
904 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
907 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
908 too little memory for the to-be-scanned arguments and overflow the
909 allocated buffer. The implementation now correctly computes the required
910 buffer size when using malloc, and switches to malloc from alloca as
913 * A new semaphore algorithm has been implemented in generic C code for all
914 machines. Previous custom assembly implementations of semaphore were
915 difficult to reason about or ensure that they were safe. The new version
916 of semaphore supports machines with 64-bit or 32-bit atomic operations.
917 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
918 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
920 * Port to Altera Nios II has been contributed by Mentor Graphics.
922 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
923 implementations for powerpc64/powerpc64le.
924 Implemented by Adhemerval Zanella (IBM).
926 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
927 and powerpc64le. This may improve lock scaling of existing programs on
928 HTM capable systems. The lock elision code is only enabled with
929 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
930 powerpc will issue a transaction abort on every syscall to avoid side
931 effects being visible outside transactions.
933 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
934 AArch64. Contributed by ARM Ltd.
936 * i386 memcpy functions optimized with SSE2 unaligned load/store.
938 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
939 under certain input conditions resulting in the execution of a shell for
940 command substitution when the application did not request it. The
941 implementation now checks WRDE_NOCMD immediately before executing the
942 shell and returns the error WRDE_CMDSUB as expected.
944 * CVE-2012-3406 printf-style functions could run into a stack overflow when
945 processing format strings with a large number of format specifiers.
947 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
948 infinite loop if the DNS response contained a PTR record of an unexpected
951 * The minimum GCC version that can be used to build this version of the GNU
952 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
953 still be used to compile programs using the GNU C Library.
955 * The GNU C Library is now built with -Werror by default. This can be
956 disabled by configuring with --disable-werror.
958 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
960 * The obsolete sigvec function has been removed. This was the original
961 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
962 programs have been using instead for about 25 years. Of course, ABI
963 compatibility for old binaries using sigvec remains intact.
965 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
966 with newer versions of bison.
968 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
969 The original MIPS o32 hard-float ABI requires an FPU where double-precision
970 registers overlay two consecutive single-precision registers. MIPS32R2
971 introduced a new FPU mode (FR=1) where double-precision registers extend the
972 corresponding single-precision registers which is incompatible with the
973 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
974 require the use of FR=1 making a transition necessary. New o32 ABI
975 extensions enable users to migrate over time from the original o32 ABI
976 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
977 tracks the ABI of any loaded object and verifies that new objects are
978 compatible. Mode transitions will also be requested as required and
979 unsupportable objects will be rejected. The ABI checks include both soft and
980 hard float ABIs for o32, n32 and n64.
982 GCC 5 with GNU binutils 2.25 onwards:
983 It is strongly recommended that all o32 system libraries are built using the
984 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
985 with the original and all new o32 ABI extensions. Configure a MIPS GCC
986 compiler using --with-fp-32=xx to set this by default.
990 * The following bugs are resolved with this release:
992 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
993 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
994 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
995 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
996 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
997 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
998 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
999 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1000 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1001 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1002 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1003 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1004 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1005 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1006 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1008 * Reverted change of ABI data structures for s390 and s390x:
1009 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1010 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1011 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1012 are preserved pointing straight to the same implementation as the old ones.
1013 Given that, new callers will simply provide a too-big buffer to these
1014 functions. Any applications/libraries out there that embed jmp_buf or
1015 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1016 against 2.19 headers will have to rebuilt again. This is necessary in any
1017 case to revert the breakage in their ABI caused by the glibc change.
1019 * Support for file description locks is added to systems running the
1020 Linux kernel. The standard file locking interfaces are extended to
1021 operate on file descriptions, not file descriptors, via the use of
1022 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1023 are associated with an open file instead of a process.
1025 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1027 * The minimum Linux kernel version that this version of the GNU C Library
1028 can be used with is 2.6.32.
1030 * Running the testsuite no longer terminates as soon as a test fails.
1031 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1032 with PASS or FAIL lines for individual tests. A summary of the results is
1033 printed, including a list of failing lists, and "make check" exits with
1034 error status if there were any unexpected failures. "make check
1035 stop-on-test-failure=y" may be used to keep the old behavior.
1037 * The am33 port, which had not worked for several years, has been removed
1040 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1041 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1042 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1043 conflicted with POSIX (support for which was removed in 2.19), the
1044 interfaces those macros enabled remain available when compiling with
1045 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1046 test macros defined.
1048 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1050 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1051 This may improve lock scaling of existing programs on TX capable systems.
1052 The lock elision code is only built with --enable-lock-elision=yes and
1053 then requires a GCC version supporting the TX builtins. With lock elision
1054 default mutexes are elided via __builtin_tbegin, if the cpu supports
1055 transactions. By default lock elision is not enabled and the elision code
1058 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1059 copy the path argument. This allowed programs to cause posix_spawn to
1060 deference a dangling pointer, or use an unexpected pathname argument if
1061 the string was modified after the posix_spawn_file_actions_addopen
1064 * All supported architectures now use the main glibc sysdeps directory
1065 instead of some being in a separate "ports" directory (which was
1066 distributed separately before glibc 2.17).
1068 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1069 On configurations that support it (all Linux configurations), it's now
1070 used regardless of the --enable-add-ons switch to configure. It is no
1071 longer possible to build such configurations without pthreads support.
1073 * Locale names, including those obtained from environment variables (LANG
1074 and the LC_* variables), are more tightly checked for proper syntax.
1075 setlocale will now fail (with EINVAL) for locale names that are overly
1076 long, contain slashes without starting with a slash, or contain ".." path
1077 components. (CVE-2014-0475) Previously, some valid locale names were
1078 silently replaced with the "C" locale when running in AT_SECURE mode
1079 (e.g., in a SUID program). This is no longer necessary because of the
1082 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1083 with application code using Intel MPX instructions. (With all previous
1084 versions, the MPX register state could be clobbered when making calls
1085 into or out of a shared library.) Note that while the new dynamic
1086 linker is compatible with all known x86 hardware whether or not it
1087 supports Intel MPX, some x86 instruction-set emulators might fail to
1088 handle the new instruction encodings. This is known to affect Valgrind
1089 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1090 release), and might affect other tools that do instruction emulation.
1092 * Support for loadable gconv transliteration modules has been removed.
1093 The support for transliteration modules has been non-functional for
1094 over a decade, and the removal is prompted by security defects. The
1095 normal gconv conversion modules are still supported. Transliteration
1096 with //TRANSLIT is still possible, and the //IGNORE specifier
1097 continues to be supported. (CVE-2014-5119)
1099 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1100 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1101 resulting a denial-of-service security vulnerability in applications which
1102 use functions related to iconv. (CVE-2014-6040)
1106 * The following bugs are resolved with this release:
1108 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1109 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1110 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1111 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1112 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1113 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1114 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1115 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1116 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1117 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1118 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1119 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1120 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1121 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1122 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1123 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1124 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1125 16431, 16453, 16474, 16506, 16510, 16529
1127 * Slovenian translations for glibc messages have been contributed by the
1128 Translation Project's Slovenian team of translators.
1130 * The public headers no longer use __unused nor __block. This change is to
1131 support compiling programs that are derived from BSD sources and use
1132 __unused internally, and to support compiling with Clang's -fblock
1133 extension which uses __block.
1135 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1136 large collation sequences to optimize multiple passes. This cache
1137 computation may overflow for large collation sequences and may cause a
1138 stack or buffer overflow. This is now fixed to use a slower algorithm
1139 which does not use a cache if there is an integer overflow.
1141 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1142 rules for large collation sequences to optimize multiple passes and falls
1143 back to alloca if malloc fails, resulting in a possible stack overflow.
1144 The implementation now falls back to an uncached collation sequence lookup
1147 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1148 initialized for static applications resulting in the security feature
1149 being disabled. The pointer guard is now correctly initialized to a
1150 random value for static applications. Existing static applications need
1151 to be recompiled to take advantage of the fix (bug 15754).
1153 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1154 to the d_name member of struct dirent, or omit the terminating NUL
1155 character. (Bugzilla #14699).
1157 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1158 aligned_alloc functions could allocate too few bytes or corrupt the
1159 heap when passed very large allocation size values (Bugzilla #15855,
1162 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1163 for AF_INET6 has been fixed (Bugzilla #16072).
1165 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1166 pap_CW, quz_PE, the_NP.
1168 * Substantially revised locales: gd_GB, ht_HT
1170 * The LC_ADDRESS field was updated to support country_car for almost all
1173 * ISO 1427 definitions were updated.
1175 * ISO 3166 definitions were updated.
1177 * The localedef utility now supports --big-endian and --little-endian
1178 command-line options to generate locales for a different system from that
1179 for which the C library was built.
1181 * Binary locale files now only depend on the endianness of the system for
1182 which they are generated and not on other properties of that system. As a
1183 consequence, binary files generated with new localedef may be incompatible
1184 with old versions of the GNU C Library, and binary files generated with
1185 old localedef may be incompatible with this version of the GNU C Library,
1186 in the following circumstances:
1188 + Locale files may be incompatible on m68k systems.
1190 + Locale archive files (but not separate files for individual locales) may
1191 be incompatible on systems where plain "char" is signed.
1193 * The configure option --disable-versioning has been removed. Builds with
1194 --disable-versioning had not worked for several years.
1196 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1197 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1199 * SystemTap probes for malloc have been introduced.
1201 * SystemTap probes for slow multiple precision fallback paths of
1202 transcendental functions have been introduced.
1204 * Support for powerpc64le has been added.
1206 * The soft-float powerpc port now supports e500 processors.
1208 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1210 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1211 set of header declarations that are enabled by default, even when other
1212 feature test macros or compiler options such as -std=c99 would otherwise
1213 disable some of those declarations.
1215 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1216 conflict with POSIX. The libbsd-compat library (which was a dummy library
1217 that did nothing) has also been removed.
1219 * Preliminary documentation about Multi-Thread, Async-Signal and
1220 Async-Cancel Safety has been added.
1222 * Change of ABI data structures for s390 and s390x:
1223 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1224 allow for future hardware extensions. All library functions that accept or
1225 return these structures were versioned in order to provide backwards
1226 compatibility with existing code. However, not all cases can be handled
1227 with interface versioning. If an application embeds either structure into
1228 another structure and that structure is passed to another compilation unit
1229 which expects the newer larger-sized object then any access to the new
1230 fields will result in undefined behaviour. Similarly any access to fields
1231 that were moved by the enlarging of the structures will cause undefined
1232 behaviour. To fix the undefined behaviour all objects that are part of the
1233 final in-memory image must agree on the size of structures, and this may
1234 require recompilation.
1238 * The following bugs are resolved with this release:
1240 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1241 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1242 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1243 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1244 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1245 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1246 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1247 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1248 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1249 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1250 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1251 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1252 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1255 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1256 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1257 Distributions can re-enable building and using pt_chown via the new configure
1258 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1259 considerable security risks and should only be used if the distribution
1260 understands and accepts the risks.
1262 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1265 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1266 fixed (Bugzilla #15330).
1268 * Add support for calling C++11 thread_local object destructors on thread
1269 and program exit. This needs compiler support for offloading C++11
1270 destructor calls to glibc.
1272 * Improved worst case performance of libm functions with double inputs and
1275 * Support for priority inherited mutexes in pthread condition variables on
1276 non-x86 architectures.
1278 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1280 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1282 * Optimized string functions for ARM. Implemented by Will Newton and
1285 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1287 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1290 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1291 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1293 * Added a benchmark framework to track performance of functions in glibc.
1295 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1296 It is based on draft TS 18661 and currently enabled as a GNU extension.
1298 * On Linux, the clock function now uses the clock_gettime system call
1299 for improved precision, rather than old times system call.
1301 * Added support for version-3 tz format files. This is needed when using
1302 the tz database release 2013e or later, and affects a few unusual cases --
1303 currently only TZ='America/Godthab' for time stamps after 2037.
1305 * Added new API functions pthread_getattr_default_np and
1306 pthread_setattr_default_np to get and set the default pthread
1307 attributes of a process.
1309 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1310 This may improve lock scaling of existing programs on TSX capable systems.
1311 When the --enable-lock-elision=yes parameter is specified at configure
1312 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1315 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1316 availability). Implemented by Ryan S. Arnold.
1318 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1322 * The following bugs are resolved with this release:
1324 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1325 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1326 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1327 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1328 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1329 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1330 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1331 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1332 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1333 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1334 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1335 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1336 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1337 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1338 14879, 14889, 14893, 14898, 14914.
1340 * Optimization of memcpy for MIPS.
1342 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1343 EMFILE has been fixed (Bugzilla #14889).
1345 * The add-on ports collection is now distributed in the "ports" subdirectory
1346 of the main GNU C Library distribution, rather than separately.
1348 * Port to ARM AArch64 contributed by Linaro.
1350 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1351 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1353 Implemented by Andreas Krebbel.
1355 * The new function secure_getenv allows secure access to the environment,
1356 returning NULL if running in a SUID/SGID process. This function replaces
1357 the internal function __secure_getenv.
1359 * SystemTap static probes have been added into the dynamic linker.
1360 Implemented by Gary Benson.
1362 * Optimizations of string functions strstr, strcasestr and memmem.
1363 Implemented by Maxim Kuvyrkov.
1365 * The minimum Linux kernel version that this version of the GNU C Library
1366 can be used with is 2.6.16.
1368 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1369 powerpc POWER7. Implemented by Will Schmidt.
1371 * New configure option --disable-nscd builds the C library such that it
1372 never attempts to contact the Name Service Caching Daemon (nscd).
1373 New configure option --disable-build-nscd avoids building nscd itself;
1374 this is the default if --disable-nscd is used.
1376 * Improved support for cross-compilation, including cross-testing and
1377 bootstrap builds without a previously built glibc.
1379 * Several testsuite tests are now able to test multiple IFUNC variants of an
1380 interface, rather than just testing the one that would be chooen by
1383 * New configure options --with-bugurl and --with-pkgversion, for
1384 distributors to use to embed their bug-reporting and package version
1385 information in --help and --version output.
1387 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1388 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1389 allows creation of chroots without the procfs mounted on /proc.
1391 * The `crypt' function now fails if passed salt bytes that violate the
1392 specification for those values. On Linux, the `crypt' function will
1393 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1394 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1395 when the mode is enabled.
1397 * The `clock_*' suite of functions (declared in <time.h>) is now available
1398 directly in the main C library. Previously it was necessary to link with
1399 -lrt to use these functions. This change has the effect that a
1400 single-threaded program that uses a function such as `clock_gettime' (and
1401 is not linked with -lrt) will no longer implicitly load the pthreads
1402 library at runtime and so will not suffer the overheads associated with
1403 multi-thread support in other code such as the C++ runtime library.
1405 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1410 * The following bugs are resolved with this release:
1412 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1413 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1414 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1415 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1416 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1417 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1418 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1419 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1420 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1421 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1422 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1423 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1424 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1425 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1426 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1427 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1428 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1429 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1430 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1431 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1432 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1433 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1436 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1437 configuring glibc with:
1438 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1439 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1440 Implemented by H.J. Lu.
1444 + define static_assert
1446 + do not declare gets
1448 + declare at_quick_exit and quick_exit also for ISO C11
1450 + aligned_alloc. NB: The code is deliberately allows the size parameter
1451 to not be a multiple of the alignment. This is a moronic requirement
1452 in the standard but it is only a requirement on the caller, not the
1455 + timespec_get added
1457 + uchar.h support added
1459 + CMPLX, CMPLXF, CMPLXL added
1461 Implemented by Ulrich Drepper.
1463 * Support for the IA-64 has been moved to ports.
1465 * Remove support for anything but ELF binary format
1467 * Checking versions of poll, ppoll added.
1468 Implemented by Ulrich Drepper.
1470 * More generic and 64-bit performance optimizations to math functions.
1471 Implemented by Ulrich Drepper.
1473 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1474 headers and functions available at compile time as they were before
1475 version 2.14. This option will be removed at some time in the future
1476 after the TI-RPC library becomes fully sufficient for the needs of
1477 existing applications.
1479 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1480 Note that glibc is not expected to work with any Linux kernel version
1483 * New header <sys/auxv.h> and function getauxval allowing easy access to
1484 the AT_* key-value pairs passed from the Linux kernel. The header also
1485 defines the HWCAP_* bits associated with the AT_HWCAP key.
1487 * New locales: mag_IN
1489 * New configure option --enable-systemtap builds SystemTap static probes
1490 into libc for setjmp and longjmp and into libpthread for various operations.
1491 So far the setjmp/longjmp probes and some of the libpthread probes are
1492 provided only for i*86 and x86_64.
1493 Implemented by Roland McGrath and Rayson Ho.
1495 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1497 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1500 * More optimized functions for SPARC. Implemented by David S. Miller.
1502 * Improved support for cross-compilation, especially bootstrap builds
1503 without a previously built glibc.
1505 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1506 Chris Metcalf from Tilera.
1508 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1509 now supported for ARM processors.
1511 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1512 as the name of the dynamic linker, to distinguish it from the
1513 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1515 * Support for CRIS has been removed from ports.
1517 * A new class of installed header has been documented for low-level
1518 platform-specific functionality. PowerPC added the first instance with a
1519 function to provide time base register access. Contributed by Tulio
1520 Magno Quites Machado Filho.
1522 * ix86 configurations now install header files that are consistent with
1523 what x86-64 configurations install. These same header files can be used
1524 for -m32, -m64, or -mx32 builds.
1525 Contributed by H.J. Lu.
1527 * Math library bug fixes. A thorough audit of all open math library bugs was
1528 conducted by Joseph Myers. Significant progress was made on many math
1529 library bugs resulting in more accurate exceptions and function results.
1530 Many thanks to all those that contributed including Andreas Jaeger for his
1531 patch review and work on the x87 trigonometric instruction issues.
1533 * Timezone data is no longer installed. Timezone-related binaries and scripts
1534 will continue to be installed. Users should obtain their timezone data from
1535 their distribution provider or from the tzdata package at
1536 <ftp://munnari.oz.au/pub/>.
1540 * The following bugs are resolved with this release:
1542 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1543 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1544 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1545 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1546 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1547 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1548 13484, 13506, 13515, 13523, 13524, 13538, 13540
1550 * New program pldd to list loaded object of a process
1551 Implemented by Ulrich Drepper.
1553 * Add nss_db support back to glibc. No more dependency on Berkeley db
1554 and support for initgroups lookups.
1555 Implemented by Ulrich Drepper.
1557 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1558 Contributed by HJ Lu.
1560 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1561 Contributed by HJ Lu.
1563 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1564 on x86-32 and x86-64.
1565 Contributed by Liubov Dmitrieva.
1567 * Optimized strchr and strrchr for SSE on x86-32.
1568 Contributed by Liubov Dmitrieva.
1570 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1571 for x86-64 and x86-32.
1572 Contributed by Liubov Dmitrieva.
1574 * New interfaces: scandirat, scandirat64
1575 Implemented by Ulrich Drepper.
1577 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1578 Implemented by Ulrich Drepper.
1580 * nscd now also caches the netgroup database.
1581 Implemented by Ulrich Drepper.
1583 * Integrate libm with gcc's -ffinite-math-only option.
1584 Implemented by Ulrich Drepper.
1586 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1587 to math functions. Implemented by Ulrich Drepper.
1589 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1590 Implemented by Ulrich Drepper.
1592 * New Linux interfaces: process_vm_readv, process_vm_writev
1594 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1595 Implemented by Ulrich Drepper.
1597 * Optimized nearbyint and strcasecmp for PPC.
1598 Implemented by Adhemerval Zanella.
1600 * New locales: bho_IN, unm_US, es_CU, ta_LK
1604 * The following bugs are resolved with this release:
1606 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1607 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1608 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1609 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1610 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1611 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1612 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1613 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1614 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1615 12795, 12811, 12813, 12814, 12841
1617 * The RPC implementation in libc is obsoleted. Old programs keep working
1618 but new programs cannot be linked with the routines in libc anymore.
1619 Programs in need of RPC functionality must be linked against TI-RPC.
1620 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1622 Visible changes of this change include (obviously) the inability to link
1623 programs using RPC functions without referencing the TI-RPC library and the
1624 removal of the RPC headers from the glibc headers.
1625 Implemented by Ulrich Drepper.
1627 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1628 syncfs, setns, sendmmsg
1630 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1631 yue_HK, lij_IT, mhr_RU
1633 * New encodings: CP770, CP771, CP772, CP773, CP774
1635 * New program sotruss to trace calls through PLTs
1636 Implemented by Ulrich Drepper.
1638 * The malloc hook implementation is marked deprecated and will be removed
1639 from the default implementation in the next version. The design never
1640 worked ever since the introduction of threads. Even programs which do
1641 not create threads themselves can use multiple threads created internally.
1645 * The following bugs are resolved with this release:
1647 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1648 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1649 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1650 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1653 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1655 * POWER7 optimizations: memset, memcmp, strncmp
1657 * New optimized string functions for x86-64: strnlen (SSE2),
1658 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1659 Implemented by Ulrich Drepper.
1663 * The following bugs are resolved with this release:
1665 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1666 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1667 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1668 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1669 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1670 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1671 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1672 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1674 * New interfaces: pthread_getname_np, pthread_setname_np
1676 * New Linux interface: recvmmsg
1678 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1680 * The dynamic linker now recognizes supported ABI versions from the
1681 EI_ABIVERSION field in the ELF header.
1682 Implemented by Ulrich Drepper.
1684 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1685 will not be used to fill in password fields in the passwd.byname replies.
1686 Instead it is used to synthesize the shadow.byname table, should it be
1687 missing. This is a useful mode in some installations involving Solaris.
1688 Implemented by Ulrich Drepper.
1690 * New locales: kok_IN, sq_MK, cv_RU
1694 * The following bugs are resolved with this release:
1696 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1697 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1698 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1699 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1700 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1701 10789, 10817, 10823, 10840, 10847
1703 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1705 Implemented by Ulrich Drepper.
1707 * Checking version of longjmp added that fails if an uninitialized stack
1708 frame would be created. Implemented by Ulrich Drepper.
1710 * STT_GNU_IFUNC is now supported in static executables.
1711 Implemented by H.J. Lu.
1713 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1715 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1716 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1717 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1718 Contributed by H.J. Lu.
1720 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1721 Implemented by Ulrich Drepper.
1723 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1725 Contributed by H.J. Lu.
1727 * Support for fma instruction in AVX on x86-64.
1728 Implemented by H.J. Lu and Ulrich Drepper.
1730 * AVX support in x86-64 auditing support in ld.so.
1731 Implemented by H.J. Lu.
1733 * STB_GNU_UNIQUE support added.
1734 Implemented by Ulrich Drepper.
1736 * Implement second fallback mode for optimized DNS lookup for even more
1737 broken environments. If two requests from the same port are not
1738 handled correctly close the socket and open a new one before sending
1739 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1740 can be used to select this mode right away, instead of rediscovering the
1741 necessity is every process again.
1742 Implemented by Ulrich Drepper.
1744 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1745 Implemented by Adam Tkac.
1747 * Optimized iconv conversions for S390x.
1748 Implemented by Andreas Krebbel.
1750 * Using condvars with PI mutexes is now more efficient due to kernel
1751 support for requeueing to PI futexes. NPTL support added for x86-64.
1752 Implemented by Ulrich Drepper.
1754 * New locales: ps_AF, my_MM
1758 * The following bugs are resolved with this release:
1760 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1761 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1762 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1763 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1764 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1766 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1767 Implemented by Ulrich Drepper.
1769 * New Linux interfaces: accept4, fallocate, fallocate64.
1770 Implemented by Ulrich Drepper.
1772 * Correct declarations of string function when used in C++ code. This
1773 could lead to compile errors for invalid C++ code.
1775 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1778 * New POSIX 2008 interface: psiginfo
1779 Implemented by Ulrich Drepper.
1781 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1782 Implemented by Ulrich Drepper.
1784 * Support for selecting between multiple function definitions at runtime
1785 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1787 * The libcrypt library can now use the hash function implementations in
1788 NSS. Implemented by Ulrich Drepper.
1790 * The malloc implementation can be compiled to be less memory efficient
1791 but higher performing in multi-threaded programs.
1792 Implemented by Ulrich Drepper.
1794 * New locales: nan_TW@latin, ks_IN
1796 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1797 Implemented by Ulrich Drepper.
1799 * Extended printf hook support. It is possible to use user-defined types
1800 and extend existing format specifiers.
1801 Implemented by Ulrich Drepper.
1803 * Handling for group shadow files has been added.
1804 Implemented by Ulrich Drepper.
1806 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1807 servers (the case, e.g., for some people using the built-in DNS
1808 server in ADSL modems/routers). There is a once-per-process timeout
1809 in case of a broken server. To avoid it, users can run nscd or put
1810 'options single-request' in /etc/resolv.conf.
1811 Implemented by Ulrich Drepper.
1815 * The following bugs are resolved with this release:
1817 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1818 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1819 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1820 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1821 6968, 6974, 6980, 6995, 7008, 7009, 7029
1823 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1824 up at the same time. Implemented by Ulrich Drepper.
1826 * TLS descriptors for LD and GD on x86 and x86-64.
1827 Implemented by Alexandre Oliva.
1829 * getaddrinfo now handles DCCP and UDPlite.
1830 Implemented by Ulrich Drepper.
1832 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1833 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1834 Implemented by Ulrich Drepper.
1836 * New implementation of memmem, strstr, and strcasestr which is O(n).
1837 Implemented by Eric Blake.
1839 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1841 * Implement "e" option for popen to open file descriptor with the
1842 close-on-exec flag set. Implemented by Ulrich Drepper.
1844 * Implement "b" mode for fmemopen. In this mode writes writes don't
1845 implicitly add a NUL byte and seeks from the end of the buffer really
1846 use the buffer end, not the string length as the basis.
1847 Implemented by Ulrich Drepper.
1849 * Many functions, exported and internal, now atomically set the close-on-exec
1850 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1852 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1854 Implemented by Pravin Satpute.
1856 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1860 * The following bugs are resolved with this release:
1862 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1863 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1864 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1865 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1866 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1867 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1868 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1870 * New locales: bo_CN, bo_IN, shs_CA.
1872 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1874 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1875 Implemented by Pravin Satpute.
1877 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1879 * nscd caches now all timeouts for DNS entries
1880 Implemented by Ulrich Drepper.
1882 * nscd is more efficient and wakes up less often.
1883 Implemented by Ulrich Drepper.
1885 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1886 vdprintf, and obstack_vprintf.
1887 Implemented by Jakub Jelinek.
1889 * Faster memset for x86-64.
1890 Implemented by Harsha Jagasia and H.J. Lu.
1892 * Faster memcpy on x86.
1893 Implemented by Ulrich Drepper.
1895 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1896 Implemented by Ulrich Drepper.
1898 * Faster sqrt and sqrtf implemention for some PPC variants.
1899 Implemented by Steven Munroe.
1903 * The following bugs are resolved with this release:
1905 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1906 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1907 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1908 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1909 5071, 5103, 5104, 5112, 5113, 5184, 5186
1911 * More checking functions: fread, fread_unlocked, open*, mq_open.
1912 Implemented by Jakub Jelinek and Ulrich Drepper.
1914 * Extend fortification to C++. Implemented by Jakub Jelinek.
1916 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1917 by not recognizing 'a' as a modifier when those specs are requested.
1918 Implemented by Jakub Jelinek.
1920 * PPC optimizations to math and string functions.
1921 Implemented by Steven Munroe.
1923 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1924 options to be passed. Implemented by Ulrich Drepper.
1926 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1928 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1929 Implemented by Ulrich Drepper.
1931 * Handle private futexes in the NPTL implementation.
1932 Implemented by Jakub Jelinek and Ulrich Drepper.
1934 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1935 Implemented by Roland McGrath and Ulrich Drepper.
1937 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1939 * SHA-256 and SHA-512 based password encryption.
1940 Implemented by Ulrich Drepper.
1942 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1943 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1946 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1947 Implemented by Ulrich Drepper.
1951 * The following bugs are resolved with this release:
1953 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1954 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1955 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1956 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1957 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1958 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1959 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1962 * New Linux interfaces: epoll_pwait, sched_getcpu.
1964 * New generic interfaces: strerror_l.
1966 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1970 * The following bugs are resolved with this release:
1972 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1973 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1974 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1975 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1976 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1977 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1978 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1979 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1980 3225, 3251, 3252, 3253, 3273
1982 * For Linux, the sorting of addresses returned by getaddrinfo now also
1983 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1984 Implemented by Ulrich Drepper.
1986 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1987 Implemented by Ulrich Drepper.
1989 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1991 * New iconv module for MIK. Contributed by Alexander Shopov.
1993 * For sites with broken group and/or passwd database, the auto-propagate
1994 option of nscd can prevent creating ID lookup entries from the results
1995 of a name lookup and vice versa. This usually is no problem but some
1996 site might have problems with the default behavior.
1997 Implemented by Ulrich Drepper.
1999 * Iterating over entire database in NIS can be slow. With the
2000 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2001 to trade time for memory. The entire database will be read at once.
2002 Implemented by Ulrich Drepper.
2004 * The interfaces introduced in RFC 3542 have been implemented by
2007 * Support for the new ELF hash table format was added by Ulrich Drepper.
2009 * Support for priority inheritance mutexes added by Jakub Jelinek and
2012 * Support for priority protected mutexes added by Jakub Jelinek.
2014 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2015 or_IN, csb_PL, fy_NL, sr_ME.
2019 * More overflow detection functions.
2021 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2022 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2024 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2025 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2026 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2027 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2028 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2029 by Masahide Washizawa.
2031 * It is now possible to install audit libraries for the dynamic linker using
2032 LD_AUDIT. Implemented by Ulrich Drepper.
2034 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2035 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2036 For a libc and libpthread that works well on Linux 2.4 kernels, we
2037 recommend using the stable 2.3 branch.
2039 * The new function open_wmemstream acts like open_memstream,
2040 but uses a wchar_t wide character buffer.
2042 * The new function ppoll is an improved version of poll, similar to pselect.
2044 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2045 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2046 renameat, unlinkat, linkat, symlinkat, readlinkat.
2048 * New Linux kernel system calls: unshare,
2049 inotify_init, inotify_add_watch, inotify_rm_watch.
2051 * The euidaccess function is now also known by the alias eaccess,
2052 for compatibility with some other systems.
2054 * Timezone data updated to 2006b version.
2058 * The following bugs are resolved with this release:
2060 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2061 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2062 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2063 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2064 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2065 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2067 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2069 * As of this release, GCC 4 can be used to compile the C Library.
2071 * Timezone data updated to 2005m version.
2075 * The following bugs are resolved with this release:
2077 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2078 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2079 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2080 777, 787, 821, 822, 823, 825
2082 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2086 * Support for RFC 3678. Real implementations exist only for Linux so far.
2087 Implemented by Ulrich Drepper.
2089 * nscd can now cache entries persistently. Expiring entries are reloaded.
2090 For speedups the cache can be shared in memory with client processes.
2091 Implemented by Ulrich Drepper.
2093 * nscd can now perform SELinux checks.
2094 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2096 * getaddrinfo queries are now cached. Canonical name lookup is performed
2098 Implemented by Ulrich Drepper.
2100 * The nothrow function attribute is used when headers are used by gcc when
2101 compiling C code. This can avoid significant amounts of exception
2104 * The malloc functions perform more error checking and are stricter when
2105 it comes to reacting on errors. The default action is to terminate
2106 the process after showing an error message. Implemented by Ulrich Drepper.
2108 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2109 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2111 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2112 namespaces using the new function dlmopen(). This feature is of course,
2113 like most other dynamic loading functionality, not available in statically
2114 linked applications. Implemented by Ulrich Drepper.
2116 * Low-overhead boundary checking variants of string and some stdio functions
2117 were added. These are to be used in conjunction with a gcc patch by
2118 Jakub Jelinek which adds calls to these functions if possible.
2119 Implemented by Jakub Jelinek and Ulrich Drepper.
2121 * Old code for several operating systems and machine architectures that
2122 have not been in working condition in a long time have been removed from
2123 the main source tree maintained by the GNU C Library's maintainers.
2124 These files are now reside in the separate `ports' source module
2125 that is usable as an add-on when building the library.
2129 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2130 interrogate the dynamic linker, compatible with the Solaris interface.
2132 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2133 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2135 * getifaddrs now uses the netlink interface on Linux to get its information.
2136 Implemented by Thorsten Kukuk.
2138 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2139 Implemented by Ulrich Drepper.
2141 * support for non-executable stacks on x86 has been added. Changes mostly
2144 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2147 * getaddrinfo now performs destination address selection according to
2152 * Thread-safe interfaces for many functions that access locale data
2153 were added in version 2.3, but these features were omitted from NEWS.
2154 Many functions have variants with an `_l' suffix that take a `locale_t'
2155 object as a parameter rather than consulting the current locale.
2156 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2157 create and maintain `locale_t' objects. Additionally, the new function
2158 `uselocale' sets "the current locale" (as used by functions not so
2159 parameterized) set for an individual thread. These features were added
2160 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2162 * The functions getresuid, getresgid, setresuid, and setresgid, which
2163 have long been available on Linux, are now declared in <unistd.h>
2164 and are now also available on the Hurd.
2166 * ELF thread-local storage support (TLS) now works on x86-64.
2168 * The new dynamic string token $LIB is expanded in shared library names.
2169 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2171 * Aldy Hernandez contributed complete software floating point support for
2172 PowerPC machines with no FPU.
2174 * fexecve is implemented on Linux.
2176 * The `btowc' function should work at least twice as fast due to
2177 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2179 * With approriate thread add-ons cancelable functions are now implemented
2180 in libc.so as well. No need to call the function in libpthread. This
2181 change allowed to finally disable the incorrect and expensive handling
2182 of weak definition in ld.so.
2184 * Yet more PLT entries in libc.so have been removed. We finally arrived
2185 at the bare minimum. Startup times improved appropriately.
2187 * Support for the new Linux/x86 system call interface was added. The
2188 AT_SYSINFO auxiliary vector entry is recognized and handled.
2192 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2195 * iconv (the program and the interface) now accepts empty names (excluding
2196 options like //TRANSLIT) to mean "use charset of current locale".
2198 * localedef can now transliterate characters in strings which are not in
2199 the provided charmap. The information from the input locale is used.
2201 * Prelinking support was added for ELF targets. This requires additional
2202 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2204 * Read-only stdio streams now use mmap to speed up operation by eliminating
2205 copying and buffer underflows. To use add 'm' to the mode string of
2206 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2208 * The malloc functions were completely rewritten by Wolfram Gloger based
2209 on Doug Lea's malloc-2.7.0.c.
2211 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2212 implementation of regex.
2214 * Bruno Haible upgraded the iconv and locale implementation to support
2217 * Contents of the LC_* and LANG environment variables in the CEN style are
2218 not recognized anymore. It never was used. Change by Ulrich Drepper.
2220 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2221 thread-local storage (TLS) ABI on some platforms.
2222 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2224 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2225 EUC-JISX0213, and TSCII.
2227 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2228 BSD-compatible interface for getting all network interface addresses.
2229 Implementation for IPv4 by Roland McGrath.
2231 * Loading of locale data is faster due to the introduction of a locale
2232 archive. Implemented by Roland McGrath and Ulrich Drepper.
2234 * Startup times are significantly reduced by not using exported functions
2235 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2238 * Steven Munroe contributed a port to PowerPC64/Linux.
2242 * The Hurd now uses the GNU libio implementation of stdio rather than the
2243 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2245 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2246 with the same behavior as the Linux system call of the same name.
2250 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2251 128-bit long double format.
2253 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2254 IBM1161, and IBM1162 charsets.
2256 * Andreas Jaeger contributed a port to x86-64/Linux.
2258 * Peter Bruin contributed a port to PowerPC/Hurd.
2260 * libc functions using I/O streams now can handle wide-oriented streams
2263 * optimizations in the dynamic linker. Binaries created by recent binutils
2264 versions start up quicker due to reduced time spent on relocations.
2266 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2270 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2271 asinh, atanh, j0 for the 128-bit long double format.
2273 * Bruno Haible updated all the code handling Unicode in some form to
2274 support Unicode 3.1.
2276 * Speed of regex for single-byte locales is back to previous levels.
2277 Patch by Isamu Hasegawa.
2279 * Alpha, SPARC, and IA-64 now also using floating stacks.
2281 * Startup time of internationalized applications greatly improved through
2282 iconv cache. Use iconvconfig to generate the cache file.
2283 Contributed by Ulrich Drepper.
2285 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2286 severe performance problems. Patch by David Mosberger.
2288 * The Hurd port got a lot more functionality like AIO, various stdio
2289 extensions, etc. Mainly done by Roland McGrath.
2291 * mtrace can now lookup symbols in shared libraries.
2295 * Intel's IA-64 math library is largely integrated. It provides fast and
2296 accurate implementatations for most basic and standard math functions
2297 in float, double, and long double format.
2299 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2300 and asin for the 96-bit long double format and asin, log, tan for the
2301 128-bit long double format.
2303 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2304 The basic double functions exist today. Contributed by Abraham Ziv
2305 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2306 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2308 * An asynchronous name lookup library was added. The interface is designed
2309 after POSIX AIO. The proposal was circulated beforehand to get comments.
2310 No negative ones came in. Implemented by Ulrich Drepper.
2312 * Port to S390/64bit contributed by Martin Schwidefsky
2313 <schwidefsky@de.ibm.com>.
2315 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2316 of functions for Linux/IA-64.
2318 * The RPC code is now thread safe. Threads can now use the same service
2319 of different services at the same time. Patch by Eric Norum
2320 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2322 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2323 family of functions for Linux/S390.
2325 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2326 of functions for Linux/x86.
2328 * Port to Linux/CRIS contributed by Axis Communications.
2332 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2333 we can now check for namespace violations and missing declarations. The
2334 result is that almost all headers are now Unix-compliant (as defined in
2335 the upcoming XPG6). The negative side is that some programs might need
2336 corrections, too, if they depend on the incorrect form of the headers in
2337 previous versions which defined too many symbols and included too many
2340 * regex now handles multibyte character sets correctly.
2341 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2343 * iconv (the program) does now conform to the upcoming XPG6 and handles
2344 charmaps. Instead of the charset names the path of charmaps can be
2345 provided and the conversion happens based on this data.
2346 Contributed by Ulrich Drepper.
2348 * The locale program now provides detailed information about the installed
2353 only lists the names of the supported locales
2357 provides details such as country, language, and codeset name.
2358 Contributed by Ulrich Drepper.
2362 * The gencat program now parses the input file according to the charset
2363 selected by the LC_CTYPE category. This is important for stateful
2364 character sets. To make generating catalogs easier there is a way
2365 to overwrite the charset selected by the locale: before the first
2366 message or $ quote line the catalog can contain a line like
2368 $ codeset=ISO-8859-2
2370 to select the charset (ISO-8859-2 in this case).
2372 Implemented by Shinya Hanataka and Ulrich Drepper.
2374 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2375 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2376 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2378 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2379 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2381 * The LANGUAGE environment variable is now ignored unless the locale is
2382 changed from the default "C" locale.
2384 * The usual bug fixes.
2388 * Greg McGary added runtime support for bounds checking using gcc's
2389 new -fbounded-pointers option. ix86 target is complete. PowerPC
2392 * Thorsten Kukuk added secure mode support to nscd.
2394 * The Berkeley db libraries have been removed.
2396 Related, the nss_db module is now in a separate package since it
2397 obviously requires a database library being available.
2399 * Wide character I/O streams implemented by Ulrich Drepper.
2401 * Functions from the extended socket API added by Ulrich Drepper.
2403 * Functions feenableexcept and fedisableexcept to control the
2404 behaviour of individual exceptions have been added by Andreas Jaeger.
2406 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2408 * The resolver code has been updated from bind 8.2.3-T5B which supports
2409 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2412 This change could in some situations effect backward compatibility. Since
2413 now `_res' is a thread-local instead of a global variable, modifying it
2414 in one thread does not have any effect in other threads.
2416 The resolver library was also extended to allow IPv6 as the transport
2417 protocol for the requests. This work was done by Stig Venaas.
2419 * Compatibility code for K&R C compilers has been removed from the
2420 header files. A ISO C compiler is needed to use the library
2421 (conforming to either C89 or C99 standard).
2423 * Complete rewrite of the localedef program to support multibyte character
2424 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2425 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2426 Implemented by Ulrich Drepper.
2428 Bruno Haible significantly improved the generation and use of the data
2429 structures for the wide character tables.
2431 * Plural handling in gettext implemented by Ulrich Drepper.
2433 * The utmp daemon has been removed.
2435 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2437 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2440 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2442 * POSIX barriers implemented by Kaz Kylheku.
2444 * POSIX spawn function family implemented by Ulrich Drepper.
2446 * POSIX spinlocks are now available.
2448 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2450 * the configure option --enable-kernel=X.Y.Z allows to strip out
2451 compatibility for kernel versions before X.Y.Z. This is currently only
2452 implemented for Linux.
2454 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2455 field sin6_scope_id. This means that all programs using IPv6 should be
2456 recompiled. Don't expect binary compatibility with previous glibc
2459 * various conversion modules for IBM character sets contributed by
2462 * IA-64 port by Jes Sorensen and HJ Lu.
2476 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2478 * New xdr functions are added; some rpc functions are now 64bit clean.
2480 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2482 * Fixed known incompatibilities with glibc 2.0.
2484 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2486 * Optimized a number of functions (especially the ELF dynamic loader).
2488 * Update timezone data files.
2490 * lots of charmaps corrections
2492 * some new locale definitions and charmaps
2497 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2498 conform to POSIX member type requirements. Symbol versions have been
2499 adjusted as needed within the library, and for direct use by applications,
2500 but there is potential for problems if third-party libraries use
2501 struct timeval as part of their interface. This does not present
2502 a problem for X and other "essential" system libraries.
2504 * An additional locale model to support C++ Standard Library locale
2505 model and probably more was implemented by Ulrich Drepper.
2507 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2510 * Miles Bader provided the `argp' function family to support hierachical
2511 command line argument parsing, layered on top of getopt.
2513 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2515 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2518 * scanf recognizes the %a and %A format for scanning floating point numbers.
2520 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2521 information and interfaces for the available integer types.
2523 * about 130 new math functions were added to implement the ISO C9x math
2526 * the new header <complex.h> contains definitions of the complex math
2527 functions from ISO C 9X.
2529 * the new header <tgmath.h> defines generic macros to use complex or
2530 real valued functions.
2532 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2534 * Andreas Jaeger provided a test suite for the math library.
2536 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2538 * Ulrich Drepper added character set conversion functions (iconv).
2540 * Optimized string functions have been added.
2542 * The localedata addon is now part of glibc.
2544 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2546 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2547 daemon for NSS (nscd).
2549 Missing a better place here are some numbers on improvements. Under
2550 Linux 2.1.125 un-tar-ing the kernel sources takes
2554 using local files 12.19s 6.88s 22.91s
2556 using NIS 13.92s 8.91s 26.34s
2558 using NIS & nscd 10.37s 7.34s 25.30s
2560 using NIS+ 27.57s 30.37s 640.46s
2562 using NIS+ & nscd 10.25s 7.83s 26.51s
2564 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2566 Keep in mind that non-namelookup related operations dominate above times.
2567 It was just a common complain that using NIS+ unpacking the kernel is
2570 [1] The old nscd implementation is not available anymore since it was
2571 distributed with glibc up to version 2.0.98 and thus is now replaced.
2573 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2575 * Mark Kettenis provided a Hesiod NSS module.
2577 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2578 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2580 * rcmd can now handle netgroups (Dick Streefland).
2582 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2585 * Support for the IPv6 protocol has been added to the socket API, as per the
2586 latest draft standards.
2588 * Support for Linux 2.2 has been added.
2590 * Interface changes relative to the latest 2.0.x release:
2591 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2592 addseverity NEW: Unix98
2593 alphasort64 NEW: LFS
2594 argp_err_exit_status NEW: argp, GNU ext
2595 argp_error NEW: argp, GNU ext
2596 argp_failure NEW: argp, GNU ext
2597 argp_help NEW: argp, GNU ext
2598 argp_parse NEW: argp, GNU ext
2599 argp_program_bug_address NEW: argp, GNU ext
2600 argp_program_version NEW: argp, GNU ext
2601 argp_program_version_hook NEW: argp, GNU ext
2602 argp_state_help NEW: argp, GNU ext
2603 argp_usage NEW: argp, GNU ext
2604 authdes_create NEW: Secure RPC
2605 authdes_getucred NEW: Secure RPC
2606 authdes_pk_create NEW: Secure RPC
2607 backtrace NEW: GNU ext.
2608 backtrace_symbols NEW: GNU ext.
2609 backtrace_symbols_fd NEW: GNU ext.
2611 cacosf NEW: ISO C 9x
2612 cacosh NEW: ISO C 9x
2613 cacoshf NEW: ISO C 9x
2614 cacoshl NEW: ISO C 9x
2615 cacosl NEW: ISO C 9x
2622 casinf NEW: ISO C 9x
2623 casinh NEW: ISO C 9x
2624 casinhf NEW: ISO C 9x
2625 casinhl NEW: ISO C 9x
2626 casinl NEW: ISO C 9x
2628 catanf NEW: ISO C 9x
2629 catanh NEW: ISO C 9x
2630 catanhf NEW: ISO C 9x
2631 catanhl NEW: ISO C 9x
2632 catanl NEW: ISO C 9x
2633 cbc_crypt NEW: Secure RPC
2637 ccoshf NEW: ISO C 9x
2638 ccoshl NEW: ISO C 9x
2644 cimagf NEW: ISO C 9x
2645 cimagl NEW: ISO C 9x
2646 clearerr_locked REMOVED
2647 clntunix_create NEW: sunrpc ext
2649 clog10 NEW: ISO C 9x
2650 clog10f NEW: ISO C 9x
2651 clog10l NEW: ISO C 9x
2661 cprojf NEW: ISO C 9x
2662 cprojl NEW: ISO C 9x
2664 crealf NEW: ISO C 9x
2665 creall NEW: ISO C 9x
2670 csinhf NEW: ISO C 9x
2671 csinhl NEW: ISO C 9x
2674 csqrtf NEW: ISO C 9x
2675 csqrtl NEW: ISO C 9x
2679 ctanhf NEW: ISO C 9x
2680 ctanhl NEW: ISO C 9x
2682 des_setparity NEW: Secure RPC
2683 ecb_crypt NEW: Secure RPC
2684 endutxent NEW: Unix98
2686 exp10f NEW: ISO C 9x
2687 exp10l NEW: ISO C 9x
2691 fattach NEW: STREAMS
2692 fdetach NEW: STREAMS
2696 feclearexcept NEW: ISO C 9x
2697 fegetenv NEW: ISO C 9x
2698 fegetexceptflag NEW: ISO C 9x
2699 fegetround NEW: ISO C 9x
2700 feholdexcept NEW: ISO C 9x
2702 feraiseexcept NEW: ISO C 9x
2703 ferror_locked REMOVED
2704 fesetenv NEW: ISO C 9x
2705 fesetexceptflag NEW: ISO C 9x
2706 fesetround NEW: ISO C 9x
2707 fetestexcept NEW: ISO C 9x
2708 feupdateenv NEW: ISO C 9x
2709 fflush_locked REMOVED
2713 fgets_unlocked NEW: GNU ext.
2714 fileno_locked REMOVED
2726 fputc_locked REMOVED
2727 fputs_unlocked NEW: GNU ext.
2728 fread_unlocked NEW: GNU ext.
2733 fstatvfs NEW: Unix98
2737 ftruncate64 NEW: LFS
2739 fwrite_unlocked NEW: GNU ext.
2740 gai_strerror NEW: IPv6
2744 getchar_locked REMOVED
2746 getdate_err NEW: Unix98
2747 getdate_r NEW: GNU ext.
2749 getnameinfo NEW: IPv6
2750 getnetname NEW: Secure RPC
2751 getpmsg NEW: STREAMS
2752 getpt NEW: Unix98 PTY
2753 getrlimit64 NEW: LFS
2754 getutxent NEW: Unix98
2755 getutxid NEW: Unix98
2756 getutxline NEW: Unix98
2757 glob64 NEW: GNU ext.
2758 globfree64 NEW: GNU ext.
2759 gnu_get_libc_release NEW: GNU ext.
2760 gnu_get_libc_version NEW: GNU ext.
2761 grantpt NEW: Unix98 PTY
2762 host2netname NEW: Secure RPC
2764 iconv_close NEW: iconv
2765 iconv_open NEW: iconv
2766 if_freenameindex NEW: IPv6
2767 if_indextoname NEW: IPv6
2768 if_nameindex NEW: IPv6
2769 if_nametoindex NEW: IPv6
2770 in6addr_any NEW: IPv6
2771 in6addr_loopback NEW: IPv6
2772 inet6_isipv4mapped NEW: IPv6
2773 isastream NEW: STREAMS
2774 iswblank NEW: GNU ext.
2775 key_decryptsession NEW: Secure RPC
2776 key_decryptsession_pk NEW: Secure RPC
2777 key_encryptsession NEW: Secure RPC
2778 key_encryptsession_pk NEW: Secure RPC
2779 key_gendes NEW: Secure RPC
2780 key_get_conv NEW: Secure RPC
2781 key_secretkey_is_set NEW: Secure RPC
2782 key_setnet NEW: Secure RPC
2783 key_setsecret NEW: Secure RPC
2784 llrint NEW: ISO C 9x
2785 llrintf NEW: ISO C 9x
2786 llrintl NEW: ISO C 9x
2787 llround NEW: ISO C 9x
2788 llroundf NEW: ISO C 9x
2789 llroundl NEW: ISO C 9x
2794 lrintf NEW: ISO C 9x
2795 lrintl NEW: ISO C 9x
2796 lround NEW: ISO C 9x
2797 lroundf NEW: ISO C 9x
2798 lroundl NEW: ISO C 9x
2800 makecontext NEW: Unix98
2801 mempcpy NEW: GNU ext.
2804 modify_ldt NEW: kernel
2808 nearbyint NEW: ISO C 9x
2809 nearbyintf NEW: ISO C 9x
2810 nearbyintl NEW: ISO C 9x
2811 netname2host NEW: Secure RPC
2812 netname2user NEW: Secure RPC
2813 nexttoward NEW: ISO C 9x
2814 nexttowardf NEW: ISO C 9x
2815 nexttowardl NEW: ISO C 9x
2819 passwd2des NEW: Secure RPC
2821 pow10f NEW: GNU ext.
2822 pow10l NEW: GNU ext.
2825 printf_size NEW: GNU ext.
2826 printf_size_info NEW: GNU ext.
2827 profil_counter REMOVED
2828 pthread_mutexattr_getkind_np REPLACED
2829 pthread_mutexattr_setkind_np REPLACED
2830 ptsname NEW: Unix98 PTY
2831 ptsname_r NEW: Unix98 PTY
2833 putchar_locked REMOVED
2834 putgrent NEW: GNU ext.
2836 putpmsg NEW: STREAMS
2837 pututxline NEW: Unix98
2841 readdir64_r NEW: LFS
2842 remquo NEW: ISO C 9x
2843 remquof NEW: ISO C 9x
2844 remquol NEW: ISO C 9x
2846 roundf NEW: ISO C 9x
2847 roundl NEW: ISO C 9x
2849 scalbln NEW: ISO C 9x
2850 scalblnf NEW: ISO C 9x
2851 scalblnl NEW: ISO C 9x
2853 sendfile NEW: kernel
2854 setcontext NEW: Unix98
2855 setrlimit64 NEW: LFS
2856 setutxent NEW: Unix98
2858 sigignore NEW: Unix98
2859 sigqueue NEW: POSIX.1b
2860 sigrelse NEW: Unix98
2861 sigset NEW: POSIX.1b
2862 sigtimedwait NEW: POSIX.1b
2863 sigwaitinfo NEW: POSIX.1b
2864 sincos NEW: GNU ext.
2865 sincosf NEW: GNU ext.
2866 sincosl NEW: GNU ext.
2870 strcasestr NEW: GNU ext.
2871 strtoimax NEW: ISO C 9x
2872 strtoumax NEW: ISO C 9x
2873 strverscmp NEW: GNU ext.
2874 svcauthdes_stats NEW: Secure RPC
2875 svcunix_create NEW: sunrpc etx
2876 svcunixfd_create NEW: sunrpc ext
2877 swapcontext NEW: Unix98
2878 tcgetsid NEW: Unix98 PTY
2879 tdestroy NEW: GNU ext.
2880 tgamma NEW: ISO C 9x
2881 tgammaf NEW: ISO C 9x
2882 tgammal NEW: ISO C 9x
2886 truncf NEW: ISO C 9x
2887 truncl NEW: ISO C 9x
2889 unlockpt NEW: Unix98 PTY
2890 updwtmpx NEW: Unix98
2891 user2netname NEW: Secure RPC
2892 utmpxname NEW: Unix98
2893 versionsort NEW: GNU ext.
2894 versionsort64 NEW: GNU ext.
2896 wcscasecmp NEW: GNU ext.
2897 wcsncasecmp NEW: GNU ext.
2898 wcsnlen NEW: GNU ext.
2899 wcstoimax NEW: ISO C 9x
2900 wcstoll NEW: ISO C 9x
2901 wcstoull NEW: ISO C 9x
2902 wcstoumax NEW: ISO C 9x
2904 wordexp NEW: POSIX.2
2905 wordfree NEW: POSIX.2
2906 write_profiling REMOVED
2907 xdecrypt NEW: Secure RPC
2908 xdr_authdes_cred NEW: Secure RPC
2909 xdr_authdes_verf NEW: Secure RPC
2910 xdr_cryptkeyarg NEW: Secure RPC
2911 xdr_cryptkeyarg2 NEW: Secure RPC
2912 xdr_cryptkeyres NEW: Secure RPC
2913 xdr_getcredres NEW: Secure RPC
2914 xdr_key_netstarg NEW: Secure RPC
2915 xdr_key_netstres NEW: Secure RPC
2916 xdr_keybuf NEW: Secure RPC
2917 xdr_keystatus NEW: Secure RPC
2918 xdr_netnamestr NEW: Secure RPC
2919 xdr_sizeof NEW: Secure RPC
2920 xdr_unixcred NEW: sunrpc ext
2921 xencrypt NEW: Secure RPC
2922 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2933 * inet_ntoa is thread-safe
2935 * updwtmp is moved from libutil to libc
2937 * rewrite of cbrt function
2939 * update of timezone data
2953 * add atoll function
2955 * fix complex problems in Berkeley DB code
2957 * fix math functions
2961 * fixed lots of header problems (especially Linux/GNU specific)
2963 * dynamic loader preserves all registers
2965 * Roland McGrath provided support for handling of auxiliary objects in
2966 the ELF dynamic loader.
2968 * support for parallel builds is improved
2972 * GNU extensions are no longer declared by default. To enable them you
2973 must define the macro `_GNU_SOURCE' in your program or compile with
2976 * The library has changed from using GNU ld symbol aliases to using weak
2977 symbols where available. The ELF object file format supports weak
2978 symbols; GNU ld also supports weak symbols in the a.out format. (There
2979 is also now support for other GNU ld extensions in ELF. Use the
2980 `--with-elf' option to configure to indicate you have ELF, and
2981 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2982 of many files which contained only symbol aliases, reducing the size of
2983 the source and the compiled library; many other files were renamed to
2984 less cryptic names previously occupied by the symbol alias files.
2985 There is a new header file <elf.h> for programs which operate on
2986 files in the ELF format.
2988 * Converted to Autoconf version 2, so `configure' has more options.
2989 Run `configure --help' to see the details.
2991 * The library can now be configured to build profiling, highly-optimized
2992 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2993 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2994 `configure' enable building these extra libraries. The shared library is
2995 built by default when using both ELF and GNU ld. When shared libraries
2996 are enabled, the new library `-ldl' is available for arbitrary run-time
2997 loading of shared objects; its interface is defined in <dlfcn.h>. The
2998 new header file <link.h> gives access to the internals of the run-time
2999 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3000 application of same name on other systems and it provides information
3001 about dynamically linked binaries.
3003 * The C library now provides the run-time support code for profiling
3004 executables compiled with `-pg'. Programs can control the profiling code
3005 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3006 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3007 the support for this file format was contributed by David Mosberger-Tang.
3009 * The math code has been replaced with a math library based on fdlibm from
3010 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3011 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3012 functions. The math functions now reside in a separate library, so
3013 programs using them will need to use `-lm' their linking commands.
3015 * John C. Bowman contributed optimized ix87 assembler inline functions.
3017 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3018 mechanism similar to that found in Solaris 2. This is now used for the
3019 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3020 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3021 file controls what services are used for each individual database. This
3022 works by loading shared libraries with names specified in `nsswitch.conf',
3023 so service modules can be changed or added at any time without even
3024 relinking any program. Currently there are the file, db, and NIS based
3025 NSS services available.
3027 * The new functions `strtoq' and `strtouq' parse integer values from
3028 strings, like `strtol' and `strtoul', but they return `long long int' and
3029 `unsigned long long int' values, respectively (64-bit quantities).
3031 * The new functions `strtof' and `strtold' parse floating-point values from
3032 strings, like `strtod', but they return `float' and `long double' values,
3033 respectively (on some machines `double' and `long double' are the same).
3035 * Ulrich Drepper has contributed new implementations of the floating-point
3036 printing and reading code used in the `printf' family of functions and
3037 `strtod', `strtof', and `strtold'. These new functions are perfectly
3038 accurate, and much faster than the old ones.
3040 * The implementation of the POSIX locale model was completely rewritten by
3041 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3042 to compile the POSIX locale definition.
3044 * The former dummy implementations of the strcoll and strxfrm function are
3045 now replaced by fully functional code contributed by Ulrich Drepper. The
3046 collation information comes from the POSIX locale definitions.
3048 * The new header <langinfo.h> defines an interface for accessing
3049 various locale-dependent data (using the locale chosen with `setlocale').
3051 * Ulrich Drepper has contributed a new suite of functions for operation on
3052 wide-character and multibyte-character strings, in <wchar.h>;
3053 and classification and case conversion of wide characters, in <wctype.h>.
3054 These new functions are conforming to the ISO C, Amendement 1 specification.
3056 * There is now a second implementation of the standard I/O library available.
3057 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3058 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3060 * You can now use positional parameter specifications in format strings
3061 for the `printf' and `scanf' families of functions. For example,
3062 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3063 ``Number 6, Mr Jones''. This is mainly useful when providing different
3064 format strings for different languages, whose grammars may dictate
3065 different orderings of the values being printed. To support this
3066 feature, the interface for `register_printf_handler' has changed; see
3067 the header file <printf.h> for details.
3069 * The `printf' and `scanf' families of functions now understand a new
3070 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3071 to group numbers as indicated by the locale; for `scanf' and friends, this
3072 says to accept as valid only a number with all the proper grouping
3073 separators in the right places. In the default "C" locale, numbers are
3074 not grouped; but locales for specific countries will define the usual
3075 conventions (i.e. separate thousands with `,' in the US locale).
3077 * The pgrp functions have been regularized, slightly incompatibly but much
3078 less confusingly. The core functions are now `getpgid' and `setpgid',
3079 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3080 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3081 provided for compatibility. There is no longer an incompatible `getpgrp'
3082 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3084 * The new header file <fts.h> and suite of functions simplify programs that
3085 operate on directory trees. This code comes from 4.4 BSD.
3087 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3088 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3089 NSS scheme used in glibc.
3091 * There is a new malloc debugging hook `__memalign_hook'.
3093 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3094 `unsigned int' in <sys/types.h>. These are for compatibility only and
3095 their use is discouraged.
3097 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3098 done differently, so that it works even without GNU ld.
3100 * New function `euidaccess' checks allowed access to a file like `access',
3101 but using the effective IDs instead of the real IDs.
3103 * The time zone data files have been updated for the latest and greatest
3104 local time conventions of the countries of the world.
3106 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3109 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3110 for formatting floating-point numbers. They are provided only for
3111 compatibility; new programs should use `sprintf' instead. There are
3112 also equivalent function for the `long double' floating-point type and
3113 all functions also exist in a reentrant form.
3115 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3116 functions for maintaining the login-record files (primarily of use to
3117 system programs such as `login'), and convenient functions for
3118 allocating and initializing a pseudo-terminal (pty) device.
3120 * Ulrich Drepper has contributed new support for System V style
3121 shared memory and IPC on systems that support it.
3123 * Ulrich Drepper has contributed several miscellaneous new functions found
3124 in System V: The `hsearch' family of functions provide an effective
3125 implementation of hash tables; `a64l' and `l64a' provide a very simple
3126 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3129 * Ulrich Drepper has contributed new reentrant counterparts for the
3130 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3132 * Ulrich Drepper has contributed new, highly-optimized versions of several
3133 string functions for the i486/Pentium family of processors.
3135 * Ulrich Drepper has updated the Linux-specific code, based largely
3136 on work done in Hongjiu Lu's version of GNU libc for Linux.
3137 The GNU library now supports Linux versions 2.0.10 and later,
3138 using the ELF object file format (i[3456]86-*-linux).
3140 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3142 * David Mosberger-Tang and Richard Henderson have ported the C library
3143 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3144 dynamic linking support for ELF/Alpha.
3146 * Richard Henderson contributed several Alpha optimized assembler function
3147 for arithmetic and string handling.
3149 * Ulrich Drepper has contributed a new set of message catalog functions to
3150 support multiple languages using the <libintl.h> interface, for use with
3151 his new package GNU gettext. Translation volunteers have contributed
3152 catalogs of the library's messages in Spanish, German, and Korean.
3154 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3155 program and the `catgets' function for reading the catalog files it
3156 creates. (The <libintl.h> interface is preferred; we include the
3157 <nl_types.h> interface using `catgets' only for source compatibility with
3158 programs already written to use it.)
3160 * New header file <values.h> gives SVID-compatible names for <limits.h>
3163 * Various new macros, declarations, and small header files for compatibility
3166 * New function `group_member' is a convenient way to check if a process has
3167 a given effective group ID.
3169 * When using GCC 2.7 and later, the socket functions are now declared in a
3170 special way so that passing an argument of type `struct sockaddr_in *',
3171 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3172 `struct sockaddr *' type, does not generate a type-clash warning.
3174 * New function `error' declared in header file <error.h> is a convenient
3175 function for printing error messages and optionally exiting; this is the
3176 canonical function used in GNU programs. The new functions `err', `warn',
3177 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3178 doing the same thing.
3180 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3181 POSIX.2 `glob' function to do ~ and {...} expansion.
3183 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3184 `clearenv' which is used in POSIX.9 is also available.
3186 * New function `getsid' returns session ID number on systems that support it.
3188 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3189 files <db.h> and <mpool.h> provide a rich set of functions for several
3190 types of simple databases stored in memory and in files, and <ndbm.h> is
3191 an old `ndbm'-compatible interface using the `db' functions. Link with
3192 `-ldb' to get these functions.
3194 * New macro `strdupa' copies a string like `strdup', but uses local stack
3195 space from `alloca' instead of dynamic heap space from `malloc'.
3197 * New function `strnlen' is like `strlen' but searches only a given maximum
3198 number of characters for the null terminator. `stpncpy', `strndup' and
3199 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3202 * New function `statfs' in header <sys/statfs.h>.
3204 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3205 provide convenient functions for operating on blocks of null-terminated
3208 * A new suite of functions in <utmp.h> handle all the details of reading
3209 and writing the utmp file.
3211 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3214 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3215 completely POSIX compliant and also implemented the extended functionality
3216 to handle alternate digit representation and alternate era date formats.
3218 * Ulrich Drepper provided an implementation of the `strptime' function
3219 defined in XPG4.2 which transforms a string into a `struct tm' value.
3221 * Paul Eggert provided the tzselect shell script as part of the timezone
3222 code. The shell script makes it easy to select the correct timezone
3225 * The implementation of the malloc family of functions is completely replaced
3226 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3227 The implementation uses the mmap function (if available) and it is
3228 optimized for the use in multi threaded programs.
3230 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3231 functions. This new functionality is usable by specifying a special
3232 salt string and it is compatible with implementation on *BSD systems.
3234 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3235 `getsubopt' to handle second level command line options, `bsd_signal'
3236 to access BSD style `signal' functionality, the obsolete `regexp' style
3239 * the `lchown' function is available on system which support this
3242 * The implementation of the shadow password handling function was contributed
3245 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3247 * POSIX.1g support was added. The <sys/select.h> header is available,
3248 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3249 implementation of `getaddrinfo'.
3253 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3255 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3256 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3258 * The new function `daemon' from 4.4 BSD is useful for server programs that
3259 want to put themselves in the background.
3261 * Joel Sherrill has contributed support for several standalone boards that
3262 run without an operating system.
3264 * `printf', `scanf' and friends now accept a `q' type modifier for long
3265 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3267 * All of the code taken from BSD (notably most of the math and networking
3268 routines) has been updated from the BSD 4.4-Lite release.
3270 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3272 * The new functions `getdomainname' and `setdomainname' fetch or change the
3273 YP/NIS domain name. These are system calls which exist on systems which
3276 * The time zone data files have been updated for the latest international
3279 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3280 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3284 * The C library now includes support for Sun RPC, from Sun's free
3285 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3286 are included. (There is still no support for YP.)
3288 * Tom Quinn has contributed a port of the C library to SGI machines running
3289 Irix 4 (mips-sgi-irix4).
3291 * The new `lockf' function is a simplified interface to the locking
3292 facilities of `fcntl', included for compatibility.
3294 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3296 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3298 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3301 * The error message printed by `assert' for a failed assertion now includes
3302 the name of the program (if using GNU ld) and the name of the calling
3303 function (with versions of GCC that support this).
3305 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3307 * The library now includes the <sys/mman.h> header file and memory
3308 management functions `mmap', `munmap', `mprotect', `msync', and
3309 `madvise', on systems that support those facilities.
3311 * The interface for `mcheck' has changed slightly: the function called to
3312 abort the program when an allocation inconsistency is detected now takes
3313 an argument that indicates the type of failure. The new function
3314 `mprobe' lets you request a consistency check for a particular block at
3315 any time (checks are normally done only when you call `free' or `realloc'
3318 * It is now possible to easily cross-compile the C library, building on one
3319 system a library to run on another machine and/or operating system. All
3320 you need to do is set the variable `HOST_CC' in `configparms' to the
3321 native compiler for programs to run on the machine you are building on (a
3322 few generator programs are used on Unix systems); set `CC' to the
3325 * The new function `fexecve' (only implemented on the GNU system) executes
3326 a program file given a file descriptor already open on the file.
3330 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3331 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3333 * You can set the variable `libprefix' in `configparms' to specify a prefix
3334 to be prepended to installed library files; this makes it easy to install
3335 the GNU C library to be linked as `-lgnuc' or whatever.
3337 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3338 copies a limited number of characters from a string, and returns the
3339 address of the last character written.
3341 * You no longer need to check for whether the installed `stddef.h' is
3342 compatible with the GNU C library. configure now checks for you.
3344 * You can now define a per-stream `fileno' function to convert the
3345 stream's cookie into an integral file descriptor.
3347 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3348 allocates zero bytes of storage, and returns a unique pointer which
3349 you can pass to `realloc' or `free'. The behavior is undefined if
3350 you dereference this pointer.
3352 * The C library now runs on Sony NEWS m68k machines running either
3353 NewsOS 3 or NewsOS 4.
3355 * The new `syscall' function is a system-dependent primitive function
3356 for invoking system calls. It has the canonical behavior on Unix
3357 systems, including unreliable return values for some calls (such as
3358 `pipe', `fork' and `getppid').
3360 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3361 to `EAGAIN', which is the preferred name. On systems whose kernels
3362 use two distinct codes, the C library now translates EWOULDBLOCK to
3363 EAGAIN in every system call function.
3367 * The GNU C Library Reference Manual is now distributed with the library.
3368 `make dvi' will produce a DVI file of the printed manual.
3369 `make info' will produce Info files that you can read on line using C-h i
3370 in Emacs or the `info' program.
3371 Please send comments on the manual to bug-glibc-manual@gnu.org.
3373 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3375 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3377 * Jason Merrill has contributed a port to the Sequent Symmetry running
3378 Dynix version 3 (i386-sequent-dynix).
3380 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3381 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3383 * New function `memory_warnings' lets you arrange to get warnings when
3384 malloc is running out of memory to allocate, like Emacs gives you.
3386 * The C library now contains the relocating allocator used in Emacs 19 for
3387 its editing buffers. This allocator (ralloc) minimizes allocation
3388 overhead and fragmentation by moving allocated regions around whenever it
3389 needs to. You always refer to a ralloc'd region with a "handle" (a
3390 pointer to a pointer--an object of type `void **').
3392 * There is a new `printf' format: `%m' gives you the string corresponding
3393 to the error code in `errno'.
3395 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3396 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3397 pass, the `a' modifier says to fill in a `char **' you pass with a
3400 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3401 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3402 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3404 * `mkstemp' is a traditional Unix function to atomically create and open a
3405 uniquely-named temporary file.
3409 * The standard location for the file that says what the local timezone is
3410 has changed again. It is now `/usr/local/etc/localtime' (or more
3411 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3413 * The distribution no longer contains any files with names longer than 14
3416 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3417 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3419 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3423 * The configuration process has changed quite a bit. The `configure'
3424 script is now used just like the configuration scripts for other GNU
3425 packages. The `sysdeps' directory hierarchy is much rearranged.
3426 The file `INSTALL' explains the new scheme in detail.
3428 * The header files no longer need to be processed into ANSI C and
3429 traditional C versions. There is just one set of files to install, and
3430 it will work with ANSI or old C compilers (including `gcc -traditional').
3432 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3433 MIPS DECStation running Ultrix 4.
3435 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3436 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3437 made itself into a shared library.
3439 * Yet further improved support for the i386, running 4.3 BSD-like systems
3440 (such as Mach 3 with the Unix single-server), or System V.
3442 * New function `strncasecmp' to do case-insensitive string comparison
3443 with limited length.
3445 * New function `strsep' is a reentrant alternative to `strtok'.
3447 * New functions `scandir' and `alphasort' for searching directories.
3449 * New function `setenv' is a better interface to `putenv'.
3451 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3452 function for traversing a directory tree.
3454 * The GNU obstack package is now also part of the C library.
3455 The new function `open_obstack_stream' creates a stdio stream that
3456 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3457 formatted output directly to an obstack.
3459 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3460 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3462 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3464 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3465 things to your strings.
3467 * There are some new test programs: test-fseek, testmb, and testrand.
3469 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3470 These ports are not finished, but are a good starting place for really
3471 supporting those systems.
3473 * `/etc/localtime' is now the standard location for the file that says what
3474 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3475 This follows the general principle that `/etc' is the place for all local
3476 configuration files.
3478 * The C library header files now use `extern "C"' when used by the C++
3479 compiler, so the C library should now work with C++ code.
3481 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3482 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3485 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3486 function which uses the `merge sort' algorithm, and is said to be
3487 significantly faster than the old GNU `qsort' function. Merge sort is
3488 now the standard `qsort' function. The new algorithm can require a lot
3489 of temporary storage; so, the old sorting function is called when the
3490 required storage is not available.
3492 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3493 provides the Unix `crypt' function, plus some other entry points.
3495 * The code and header files taken from 4.4 BSD have been updated with the
3496 latest files released from Berkeley.
3498 ----------------------------------------------------------------------
3499 Copyright information:
3501 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3503 Permission is granted to anyone to make or distribute verbatim copies
3504 of this document as received, in any medium, provided that the
3505 copyright notice and this permission notice are preserved,
3506 thus giving the recipient permission to redistribute in turn.
3508 Permission is granted to distribute modified versions
3509 of this document, or of portions of it,
3510 under the above conditions, provided also that they
3511 carry prominent notices stating who last changed them.
3514 version-control: never