1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
36 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
37 the femode_t type and the FE_DFL_MODE macro.
39 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
40 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
41 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
42 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
43 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
44 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
45 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
46 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
47 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
48 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
49 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
52 * New <math.h> features are added from TS 18661-1:2014:
54 - Comparison macros: iseqsig.
56 - Classification macros: iscanonical, issubnormal, iszero.
58 - Total order functions: totalorder, totalorderf, totalorderl,
59 totalordermag, totalordermagf, totalordermagl.
61 - NaN functions: getpayload, getpayloadf, getpayloadl.
63 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
64 are added to libc. They convert a floating-point number into string.
66 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
67 for the Linux quota interface which predates kernel version 2.4.22 has
70 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
71 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
72 “no-ip6-dotint” had already been the default, and support for the
73 “ip6-dotint” option was removed from the Internet in 2006.
75 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
76 flag from <resolv.h> have been removed. The option relied on a
77 backwards-incompatible DNS extension which was never deployed on the
80 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
81 in the <resolv.h> header file have been deprecated. They were already
84 * DNSSEC-related declarations and definitions have been removed from the
85 <arpa/nameser.h> header file, and libresolv will no longer attempt to
86 decode the data part of DNSSEC record types. Previous versions of glibc
87 only implemented minimal support for the previous version of DNSSEC, which
88 is incompatible with the currently deployed version.
90 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
91 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
92 <arpa/nameser.h> header file because the distinction between RR types and
93 meta-RR types is not officially standardized, subject to revision, and
94 thus not suitable for encoding in a macro.
96 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
97 and rhook members of the res_state type in <resolv.h> have been removed.
98 The glibc stub resolver did not support these hooks, but the header file
101 * For multi-arch support it is recommended to use a GCC which has
102 been built with support for GNU indirect functions. This ensures
103 that correct debugging information is generated for functions
104 selected by IFUNC resolvers. This support can either be enabled by
105 configuring GCC with '--enable-gnu-indirect-function', or by
106 enabling it by default by setting 'default_gnu_indirect_function'
107 variable for a particular architecture in the GCC source file
110 Security related changes:
112 On ARM EABI (32-bit), generating a backtrace for execution contexts which
113 have been created with makecontext could fail to terminate due to a
114 missing .cantunwind annotation. This has been observed to lead to a hang
115 (denial of service) in some Go applications compiled with gccgo. Reported
116 by Andreas Schwab. (CVE-2016-6323)
118 The following bugs are resolved with this release:
120 [The release manager will add the list generated by
121 scripts/list-fixed-bugs.py just before the release.]
125 * The minimum Linux kernel version that this version of the GNU C Library
126 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
127 kernel version 2.6.32 or later suffices (on architectures that already
128 required kernel versions more recent than 3.2, those requirements remain
129 unchanged). Linux 3.2 or later kernel headers are required on all
132 * The pap_AN locale has been deleted. This has been deprecated for a long
133 time. It has been replaced by pap_AW & pap_CW, both of which have long
134 been included in previous releases.
136 * The readdir_r and readdir64_r functions have been deprecated. It is
137 recommended to use readdir and readdir64 instead.
139 * The type “union wait” has been removed. It was deprecated in the early
140 1990s and never part of POSIX. Application code should use the int type
141 instead of “union wait”.
143 * A new NSS action is added to facilitate large distributed system
144 administration. The action, MERGE, allows remote user stores like LDAP
145 to be merged into local user stores like /etc/groups in order to provide
146 easy to use, updated, and managed sets of merged credentials. The new
147 action can be used by configuring it in /etc/nsswitch.conf:
148 group: files [SUCCESS=merge] nis
149 Implemented by Stephen Gallagher (Red Hat).
151 * The deprecated __malloc_initialize_hook variable has been removed from the
154 * The long unused localedef --old-style option has been removed. It hasn't
155 done anything in over 16 years. Scripts using this option can safely
158 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
159 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
160 return the next representable value in the direction of positive infinity
161 and the nextdown functions return the next representable value in the
162 direction of negative infinity. These are currently enabled as GNU
165 Security related changes:
167 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
168 could result in a stack overflow when getnetbyname was called with an
169 overly long name. (CVE-2016-3075)
171 * Previously, getaddrinfo copied large amounts of address data to the stack,
172 even after the fix for CVE-2013-4458 has been applied, potentially
173 resulting in a stack overflow. getaddrinfo now uses a heap allocation
174 instead. Reported by Michael Petlan. (CVE-2016-3706)
176 * The glob function suffered from a stack-based buffer overflow when it was
177 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
178 Reported by Alexander Cherepanov. (CVE-2016-1234)
180 * The Sun RPC UDP client could exhaust all available stack space when
181 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
182 alloca plugin for GCC. (CVE-2016-4429)
184 * The IPv6 name server management code in libresolv could result in a memory
185 leak for each thread which is created, performs a failing naming lookup,
186 and exits. Over time, this could result in a denial of service due to
187 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
189 The following bugs are resolved with this release:
191 [1170] localedata: ne_NP: update Nepali locale definition file
192 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
194 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
195 [6796] math: fdim() does not set errno on overflow
196 [10354] libc: posix_spawn should use vfork() in more cases than presently
197 [11213] localedata: localedata: add copyright disclaimer to locale files
198 [12143] localedata: chr_US: new Cherokee locale
199 [12450] localedata: sgs_LT: new locale
200 [12676] localedata: ln_CD: new locale
201 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
203 [13304] math: fma, fmaf, fmal produce wrong results
204 [14259] build: --localedir arg to configure is ignored
205 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
206 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
207 [14934] localedata: es_CL: wrong first weekday chilean locale
208 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
210 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
212 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
213 [15368] nptl: raise() is not async-signal-safe
214 [15479] math: ceil, floor, round and trunc raise inexact exception
215 [15578] localedata: kk_KZ: various updates
216 [16003] localedata: pap_AN: punt old locale
217 [16137] localedata: iw_IL: punt old locale
218 [16190] localedata: eo: new esperanto locale
219 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
220 [16742] malloc: race condition: pthread_atfork() called before first
221 malloc() results in unexpected locking behaviour/deadlocks
222 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
224 [16983] localedata: postal_fmt does not allow %l and %n modifiers
225 [17565] localedata: pt_PT: wrong (work-)week start
226 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
227 [17950] build: Build fails with -msse
228 [18205] localedata: be_BY*: wrong first_weekday and first_workday
229 [18433] libc: posix_spawn does not return correctly upon failure to
231 [18453] localedata: charmaps/IBM875: incorrect codes
232 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
234 [18896] localedata: he_IL: improvements for currency
235 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
237 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
239 [19056] libc: Deprecate readdir_r
240 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
242 [19198] localedata: nl_NL: small improvements for Dutch locales
243 [19257] network: Per-thread memory leak in __res_vinit with IPv6
244 nameservers (CVE-2016-5417)
245 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
247 [19400] locale: Language missing in "iso-639.def", trivial fix in
249 [19431] malloc: Deadlock between fflush, getdelim, and fork
250 [19505] libc: Incorrect file descriptor validity checks in
251 posix_spawn_file_actions_add{open,close,dup2}
252 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
254 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
255 `intl/{gettextP,loadinfo}.h'
256 [19534] libc: execle, execlp may use malloc
257 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
258 [19573] network: res_nclose and __res_maybe_init disagree about name
259 server initialization, breaking Hesiod
260 [19575] localedata: Status of GB18030 tables
261 [19581] localedata: sr_* date_fmt string contains additional newline
262 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
264 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
265 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
266 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
267 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
269 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
271 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
273 [19610] dynamic-link: ldconfig -X removes stale symbolic links
274 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
275 [19633] locale: strfmon_l applies global locale to number formatting
276 [19642] network: Memory leak in getnameinfo
277 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
278 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
280 [19654] math: [x86_64] Need testcase for BZ #19590 fix
281 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
283 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
284 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
286 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
288 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
290 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
291 pointers and lengths in error-case.
292 [19727] locale: Converting from/to UTF-xx with iconv() does not always
293 report errors on UTF-16 surrogates values.
294 [19755] nscd: nscd assertion failure in gc
295 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
296 [19759] libc: mempcpy shouldn't be inlined
297 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
298 [19765] libc: s390 needs an optimized mempcpy
299 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
300 NAME_MAX limit assumption (CVE-2016-1234)
301 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
302 [19787] network: Missing and incorrect truncation checks in getnameinfo
303 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
305 [19791] network: Assertion failure in res_query.c with un-connectable name
307 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
308 [19822] math: libm.so install clobbers old version
309 [19825] network: resolv: send_vc can return uninitialized data in second
310 response to getaddrinfo
311 [19830] network: nss_dns: should check RDATA length against buffer length
312 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
313 confronted with A/AAAA records of invalid size
314 [19837] nss: nss_db: No retries for some long lines with a larger buffer
315 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
316 [19853] stdio: Printing IBM long double in decimal with high precision is
318 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
319 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
320 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
322 [19865] network: Assertion failure or memory leak in
323 _nss_dns_getcanonname_r
324 [19868] network: nss_dns: netent code does not skip over non-PTR records
325 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
327 [19881] string: Improve x86-64 memset
328 [19907] string: Incorrect memcpy tests
329 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
331 [19925] libc: termios.h XCASE namespace
332 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
333 [19929] libc: limits.h NL_NMAX namespace
334 [19931] stdio: Memory leak in vfprintf
335 [19957] libc: clone(CLONE_VM) access invalid parent memory
336 [19963] localedata: en_IL: New locale
337 [19989] stdio: stdio.h cuserid namespace
338 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
340 [19996] locale: langinfo.h nl_langinfo_l namespace
341 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
342 [20010] network: getaddrinfo: Stack overflow in hostent translation
344 [20012] stdio: libio: fmemopen append mode failure
345 [20014] stdio: stdio.h namespace for pre-threads POSIX
346 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
347 [20023] libc: fcntl.h timespec namespace
348 [20024] math: [x86_64] vectorized sincos trashes the stack
349 [20031] network: nss_hesiod: Heap overflow in get_txt_records
350 [20041] time: sys/time.h timespec namespace
351 [20043] libc: unistd.h missing cuserid for UNIX98 and before
352 [20044] libc: unistd.h missing pthread_atfork for UNIX98
353 [20051] libc: ttyslot in wrong header under wrong conditions
354 [20054] libc: gethostname not declared for XPG4
355 [20055] libc: termios.h missing tcgetsid for XPG4
356 [20072] dynamic-link: x86 init_cpu_features is called twice in static
358 [20073] libc: sys/stat.h fchmod namespace
359 [20074] libc: stdlib.h rand_r namespace
360 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
361 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
363 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
364 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
366 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
367 [20119] libc: Wrong mask for processors level type from CPUID
368 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
369 AS not supporting AVX512
370 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
372 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
373 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
375 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
376 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
377 [20178] libc: posix_spawn{p} should not call exit
378 [20191] stdio: libio: vtables hardening
379 [20195] string: FMA4 detection requires CPUID execution with register
381 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
382 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
384 [20212] math: acos (sNaN) returns sNaN
385 [20213] math: asin (sNaN) returns sNaN
386 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
387 [20218] math: [i386] asinhl (sNaN) returns sNaN
388 [20219] math: [i386] atanhl (sNaN) returns sNaN
389 [20222] stdio: fopencookie: Mangle function pointers
390 [20224] math: [i386] cbrtl (sNaN) returns sNaN
391 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
392 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
394 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
395 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
396 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
397 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
398 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
399 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
400 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
401 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
402 [20240] math: modf (sNaN) returns sNaN
403 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
404 [20250] math: frexp (sNaN) returns sNaN
405 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
406 [20255] math: [i386] fdim, fdimf return with excess range and precision /
408 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
409 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
410 subscript is below array bounds [-Werror=array-bounds]
411 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
412 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
414 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
415 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
417 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
419 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
420 [20316] localedata: id_ID: Februari instead of Pebruari
421 [20327] string: POWER8 strcasecmp returns incorrect result
422 [20347] math: Failure: Test: j0_downward (0xap+0)
423 [20348] libc: FAIL: misc/tst-preadvwritev64
424 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
425 [20350] libc: There is no test for p{read,write}64
426 [20357] math: Incorrect cos result for 1.5174239687223976
427 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
431 * Unicode 8.0.0 Support: Character encoding, character type info, and
432 transliteration tables are all updated to Unicode 8.0.0, using new
433 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
434 These updates cause user visible changes, such as the fixes for bugs
435 89, 16061, and 18568.
437 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
438 kernel-internal CPU set size. This means that requests that change the
439 CPU affinity which failed before (for example, an all-ones CPU mask) will
440 now succeed. Applications that need to determine the effective CPU
441 affinities need to call sched_getaffinity or pthread_getaffinity_np after
442 setting it because the kernel can adjust it (and the previous size check
443 would not detect this in the majority of cases).
445 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
446 the following new symbols are used: fts64_children, fts64_close,
447 fts64_open, fts64_read and fts64_set.
449 * getaddrinfo now detects certain invalid responses on an internal netlink
450 socket. If such responses are received, an affected process will
451 terminate with an error message of "Unexpected error <number> on netlink
452 descriptor <number>" or "Unexpected netlink response of size <number> on
453 descriptor <number>". The most likely cause for these errors is a
454 multi-threaded application which erroneously closes and reuses the netlink
455 file descriptor while it is used by getaddrinfo.
457 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
458 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
459 unnecessary serialization of memory allocation requests across threads.
460 The defect is now corrected. Users should see a substantial increase in
461 the concurent throughput of allocation requests for applications which
462 trigger this bug. Affected applications typically create and
463 destroy threads frequently. (Bug 19048 was reported and analyzed by
466 * There is now a --disable-timezone-tools configure option for disabling the
467 building and installing of the timezone related utilities (zic, zdump, and
468 tzselect). This is useful for people who build the timezone data and code
469 independent of the GNU C Library.
471 * The obsolete header <regexp.h> has been removed. Programs that require
472 this header must be updated to use <regex.h> instead.
474 * The obsolete functions bdflush, create_module, get_kernel_syms,
475 query_module and uselib are no longer available to newly linked binaries;
476 the header <sys/kdaemon.h> has been removed. These functions and header
477 were specific to systems using the Linux kernel and could not usefully be
478 used with the GNU C Library on systems with version 2.6 or later of the
481 * Optimized string, wcsmbs and memory functions for IBM z13.
482 Implemented by Stefan Liebler.
484 * Newly linked programs that define a variable called signgam will no longer
485 have it set by the lgamma, lgammaf and lgammal functions. Programs that
486 require signgam to be set by those functions must ensure that they use the
487 variable provided by the GNU C Library and declared in <math.h>, without
488 defining their own copy.
490 * The minimum GCC version that can be used to build this version of the GNU
491 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
492 still be used to compile programs using the GNU C Library.
494 Security related changes:
496 * An out-of-bounds value in a broken-out struct tm argument to strftime no
497 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
499 * The LD_POINTER_GUARD environment variable can no longer be used to disable
500 the pointer guard feature. It is always enabled. Previously,
501 LD_POINTER_GUARD could be used to disable security hardening in binaries
502 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
505 * An integer overflow in hcreate and hcreate_r could lead to an
506 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
508 * The catopen function no longer has unbounded stack usage. Reported by
511 * The nan, nanf and nanl functions no longer have unbounded stack usage
512 depending on the length of the string passed as an argument to the
513 functions. Reported by Joseph Myers. (CVE-2014-9761)
515 * A stack-based buffer overflow was found in libresolv when invoked from
516 libnss_dns, allowing specially crafted DNS responses to seize control
517 of execution flow in the DNS client. The buffer overflow occurs in
518 the functions send_dg (send datagram) and send_vc (send TCP) for the
519 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
520 family. The use of AF_UNSPEC triggers the low-level resolver code to
521 send out two parallel queries for A and AAAA. A mismanagement of the
522 buffers used for those queries could result in the response of a query
523 writing beyond the alloca allocated buffer created by
524 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
525 the overflow. Thanks to the Google Security Team and Red Hat for
526 reporting the security impact of this issue, and Robert Holiday of
527 Ciena for reporting the related bug 18665. (CVE-2015-7547)
529 The following bugs are resolved with this release:
531 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
532 [887] math: Math library function "logb" and "nextafter" inconsistent
533 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
534 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
535 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
536 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
538 [4404] localedata: German translation of "Alarm clock" is misleading
539 [6799] math: nextafter() and nexttoward() doen't set errno on
540 overflow/underflow errors
541 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
543 [10432] nis: _nss_nis_setnetgrent assertion failure
544 [11460] libc: fts has no LFS support
545 [12926] network: getaddrinfo()/make_request() may spin forever
546 [13065] nptl: Race condition in pthread barriers
547 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
548 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
550 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
551 [14912] libc: Rename non-installed bits/*.h headers
552 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
553 [15367] math: Let gcc use __builtin_isinf
554 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
555 [15421] math: lgamma wrongly sets signgam for ISO C
556 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
557 FE_INVALID with argument out of range
558 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
560 [15786] dynamic-link: ifunc resolver functions can smash function
562 [15918] math: Unnecessary check for equality in hypotf()
563 [16061] localedata: Review / update transliteration data
564 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
566 [16141] time: strptime %z offset restriction
567 [16171] math: drem should be alias of remainder
568 [16296] math: fegetround is pure?
569 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
570 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
572 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
573 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
575 [16422] math: [powerpc] math-float, math-double failing llrint tests with
576 "Exception "Inexact" set" on ppc32
577 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
578 [16517] math: Missing underflow exception from tanf/tan/tanl
579 [16519] math: Missing underflow exception from sinhf
580 [16520] math: Missing underflow exception from tanhf
581 [16521] math: Missing underflow exception from exp2
582 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
584 [16734] stdio: fopen calls mmap to allocate its buffer
585 [16961] math: nan function incorrect handling of bad sequences
586 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
587 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
588 [16985] locale: localedef: confusing error message when opening output
590 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
591 [17197] locale: Redundant shift character in iconv conversion output at
593 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
594 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
595 [17250] dynamic-link: static linking breaks nss loading
596 (getaddrinfo/getpwnam/etc...)
597 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
599 [17441] math: isnan() should use __builtin_isnan() in GCC
600 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
601 (related to lock elision)
602 [17787] manual: Exponent on page 324 of the PDF ends prematurely
603 [17886] time: strptime should be able to parse "Z" as a timezone with %z
604 [17887] time: strptime should be able to parse "+01:00" style timezones
605 [17905] libc: catopen() Multiple unbounded stack allocations
607 [18084] libc: backtrace (..., 0) dumps core on x86
608 [18086] libc: nice() sets errno to 0 on success
609 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
610 is too large (CVE-2015-8778)
611 [18251] dynamic-link: SONAME missing when audit modules provides path
612 [18265] libc: add attributes for wchar string and memory functions
613 [18370] math: csqrt missing underflows
614 [18421] libc: [hppa] read-only segment has dynamic relocations
615 [18472] libc: Obsolete syscall wrappers should be compat symbols
616 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
617 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
618 [18525] localedata: Remove locale timezone information
619 [18560] libc: [powerpc] spurious bits/ipc.h definitions
620 [18568] localedata: Update locale data to Unicode 8.0
621 [18589] locale: sort-test.sh fails at random
622 [18595] math: ctan, ctanh missing underflows
623 [18604] libc: assert macro-expands its argument
624 [18610] math: S390: fetestexcept() reports any exception if DXC-code
625 contains a vector instruction exception.
626 [18611] math: j1, jn missing errno setting on underflow
627 [18618] localedata: sync Chechen locale definitions with other *_RU
629 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
630 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
631 [18665] network: In send_dg, the recvfrom function is NOT always using the
632 buffer size of a newly created buffer (CVE-2015-7547)
633 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
635 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
637 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
638 [18699] math: tilegx cproj() for various complex infinities does not yield
640 [18724] libc: Harden put*ent functions against data injection
641 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
642 [18755] build: build errors with -DNDEBUG
643 [18757] stdio: fmemopen fails to set errno on failure
644 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
646 [18781] libc: openat64 lacks O_LARGEFILE
647 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
648 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
649 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
650 [18790] math: [ldbl-128ibm] tanhl inaccurate
651 [18795] libc: stpncpy fortification misses buffer lengths that are
653 [18796] build: build fails for --disable-mathvec
654 [18803] math: hypot missing underflows
655 [18820] stdio: fmemopen may leak memory on failure
656 [18823] math: csqrt spurious underflows
657 [18824] math: fma spurious underflows
658 [18825] math: pow missing underflows
659 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
660 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
661 [18870] build: sem_open.c fails to compile with missing symbol
663 [18872] stdio: Fix memory leak in printf_positional
664 [18873] libc: posix_fallocate overflow check ineffective
665 [18875] math: Excess precision leads incorrect libm
666 [18877] libc: arm: mmap offset regression
667 [18887] libc: memory corruption when using getmntent on blank lines
668 [18918] localedata: hu_HU: change time to HH:MM:SS format
669 [18921] libc: Regression: extraneous stat() and fstat() performed by
671 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
672 binaries (CVE-2015-8777)
673 [18951] math: tgamma missing underflows
674 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
676 [18953] localedata: lt_LT: change currency symbol to the euro
677 [18956] math: powf inaccuracy
678 [18961] math: [i386] exp missing underflows
679 [18966] math: [i386] exp10 missing underflows
680 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
681 [18969] build: multiple string test failures due to missing locale
683 [18970] libc: Reference of pthread_setcancelstate in libc.a
684 [18977] math: float / long double Bessel functions not in XSI POSIX
685 [18980] math: i386 libm functions return with excess range and precision
686 [18981] math: i386 scalb*, ldexp return with excess range and precision
687 [18982] stdio: va_list and vprintf
688 [18985] time: Passing out of range data to strftime() causes a segfault
690 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
691 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
692 [19012] locale: iconv_open leaks memory on error path
693 [19016] math: clog, clog10 inaccuracy
694 [19018] nptl: Mangle function pointers in tls_dtor_list
695 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
696 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
697 [19048] malloc: malloc: arena free list can become cyclic, increasing
699 [19049] math: [powerpc] erfc incorrect zero sign
700 [19050] math: [powerpc] log* incorrect zero sign
701 [19058] math: [x86_64] Link fail with -fopenmp and -flto
702 [19059] math: nexttoward overflow incorrect in non-default rounding modes
703 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
704 [19074] network: Data race in _res_hconf_reorder_addrs
705 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
706 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
707 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
709 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
711 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
712 [19086] manual: posix_fallocate64 documented argument order is wrong.
713 [19088] math: lround, llround missing exceptions close to overflow
715 [19094] math: lrint, llrint missing exceptions close to overflow threshold
716 [19095] math: dbl-64 lrint incorrect for 64-bit long
717 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
718 [19124] dynamic-link: ld.so failed to build with older assmebler
719 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
720 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
721 [19134] math: [powerpc32] lround, lroundf spurious exceptions
722 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
723 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
724 pthread_setaffinity_np
725 [19156] math: [ldbl-128] j0l spurious underflows
726 [19164] nptl: tst-getcpu fails with many possible CPUs
727 [19168] math: math/test-ildoubl and math/test-ldouble failure
728 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
729 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
731 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
732 (FE_NOMASK_ENV) do not clear SSE exceptions
733 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
734 _int_new_arena/reused_arena
735 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
736 [19201] math: dbl-64 remainder incorrect sign of zero result
737 [19205] math: bits/math-finite.h conditions do not match math.h and
739 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
740 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
741 for C99-based standards
742 [19212] libc: features.h not -Wundef clean
743 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
745 [19214] libc: Family and model identification for AMD CPU's are incorrect.
746 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
747 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
749 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
751 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
753 [19242] libc: strtol incorrect in Turkish locales
754 [19243] malloc: reused_arena can pick an arena on the free list, leading
755 to an assertion failure and reference count corruption
756 [19253] time: tzset() ineffective when temporary TZ did not include DST
758 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
759 [19270] math: [hppa] Shared libm missing __isnanl
760 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
761 MAP_HUGETLB and MAP_STACK defines
762 [19313] nptl: Wrong __cpu_mask for x32
763 [19347] libc: grantpt: try to force a specific gid even without pt_chown
764 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
765 [19350] math: [ldbl-128ibm] sinhl spurious overflows
766 [19351] math: [ldbl-128ibm] logl inaccurate near 1
767 [19363] time: x32: times() return value wrongly truncates/sign extends
769 [19367] dynamic-link: Improve branch prediction on Silvermont
770 [19369] network: Default domain name not reset by res_ninit when "search"
771 / "domain" entry is removed from resolv.conf
772 [19375] math: powerpc: incorrect results for POWER7 logb with negative
774 [19385] localedata: bg_BG: time separator should be colon, not comma
775 [19408] libc: linux personality syscall wrapper may erroneously return an
776 error on 32-bit architectures
777 [19415] libc: dladdr returns wrong names on hppa
778 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
779 IBM905, IBM907, and IBM909
780 [19439] math: Unix98 isinf and isnan functions conflict with C++11
781 [19443] build: build failures with -DDEBUG
782 [19451] build: Make check fails on test-double-vlen2
783 [19462] libc: Glibc failed to build with -Os
784 [19465] math: Wrong code with -Os
785 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
787 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
789 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
790 [19486] math: S390: Math tests fail with "Exception Inexact set".
791 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
792 [19550] libc: [mips] mmap negative offset handling inconsistent with other
794 [19590] math: Fail to build shared objects that use libmvec.so functions.
798 * The following bugs are resolved with this release:
800 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
801 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
802 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
803 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
804 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
805 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
806 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
807 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
808 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
809 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
810 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
811 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
812 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
813 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
814 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
815 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
816 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
817 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
818 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
819 18657, 18676, 18694, 18696, 18887.
821 * Cache information can be queried via sysconf() function on s390 e.g. with
822 _SC_LEVEL1_ICACHE_SIZE as argument.
824 * A buffer overflow in gethostbyname_r and related functions performing DNS
825 requests has been fixed. If the NSS functions were called with a
826 misaligned buffer, the buffer length change due to pointer alignment was
827 not taken into account. This could result in application crashes or,
828 potentially arbitrary code execution, using crafted, but syntactically
829 valid DNS responses. (CVE-2015-1781)
831 * The time zone file parser has been made more robust against crafted time
832 zone files, avoiding heap buffer overflows related to the processing of
833 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
834 large time zone data files. Overly long time zone specifiers in the TZ
835 variable no longer result in stack overflows and crashes.
837 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
838 for LD and GD on x86 and x86-64, has been implemented. You will need
839 binutils-2.24 or later to enable this optimization.
841 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
842 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
843 Hat). These updates cause user visible changes, such as the fix for bug
846 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
847 and getXXbyYY NSS calls for the same database, causing a denial-of-service
848 condition in some applications.
850 * Added vector math library named libmvec with the following vectorized x86_64
851 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
853 The library can be disabled with --disable-mathvec. Use of the functions is
854 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
855 Shared library libmvec.so is linked in as needed when using -lm (no need to
856 specify -lmvec explicitly for not static builds).
857 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
859 * A new fmemopen implementation has been added with the goal of POSIX
860 compliance. The new implementation fixes the following long-standing
861 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
862 old implementation is still present for use be by existing binaries.
864 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
865 releases. It has been fixed to match 2.19 and older, but binaries built
866 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
868 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
869 Contributed by Roland McGrath (Google).
871 * The header <regexp.h> is deprecated, and will be removed in a future
872 release. Use of this header will trigger a deprecation warning.
873 Application developers should update their code to use <regex.h> instead.
875 This header was formerly part of SUS, but was deprecated in 1994 and
876 removed from the standard in 2001. Also, the glibc implementation
877 leaks memory. See BZ#18681 for more details.
881 * The following bugs are resolved with this release:
883 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
884 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
885 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
886 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
887 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
888 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
889 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
890 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
891 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
892 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
895 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
896 too little memory for the to-be-scanned arguments and overflow the
897 allocated buffer. The implementation now correctly computes the required
898 buffer size when using malloc, and switches to malloc from alloca as
901 * A new semaphore algorithm has been implemented in generic C code for all
902 machines. Previous custom assembly implementations of semaphore were
903 difficult to reason about or ensure that they were safe. The new version
904 of semaphore supports machines with 64-bit or 32-bit atomic operations.
905 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
906 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
908 * Port to Altera Nios II has been contributed by Mentor Graphics.
910 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
911 implementations for powerpc64/powerpc64le.
912 Implemented by Adhemerval Zanella (IBM).
914 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
915 and powerpc64le. This may improve lock scaling of existing programs on
916 HTM capable systems. The lock elision code is only enabled with
917 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
918 powerpc will issue a transaction abort on every syscall to avoid side
919 effects being visible outside transactions.
921 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
922 AArch64. Contributed by ARM Ltd.
924 * i386 memcpy functions optimized with SSE2 unaligned load/store.
926 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
927 under certain input conditions resulting in the execution of a shell for
928 command substitution when the application did not request it. The
929 implementation now checks WRDE_NOCMD immediately before executing the
930 shell and returns the error WRDE_CMDSUB as expected.
932 * CVE-2012-3406 printf-style functions could run into a stack overflow when
933 processing format strings with a large number of format specifiers.
935 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
936 infinite loop if the DNS response contained a PTR record of an unexpected
939 * The minimum GCC version that can be used to build this version of the GNU
940 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
941 still be used to compile programs using the GNU C Library.
943 * The GNU C Library is now built with -Werror by default. This can be
944 disabled by configuring with --disable-werror.
946 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
948 * The obsolete sigvec function has been removed. This was the original
949 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
950 programs have been using instead for about 25 years. Of course, ABI
951 compatibility for old binaries using sigvec remains intact.
953 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
954 with newer versions of bison.
956 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
957 The original MIPS o32 hard-float ABI requires an FPU where double-precision
958 registers overlay two consecutive single-precision registers. MIPS32R2
959 introduced a new FPU mode (FR=1) where double-precision registers extend the
960 corresponding single-precision registers which is incompatible with the
961 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
962 require the use of FR=1 making a transition necessary. New o32 ABI
963 extensions enable users to migrate over time from the original o32 ABI
964 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
965 tracks the ABI of any loaded object and verifies that new objects are
966 compatible. Mode transitions will also be requested as required and
967 unsupportable objects will be rejected. The ABI checks include both soft and
968 hard float ABIs for o32, n32 and n64.
970 GCC 5 with GNU binutils 2.25 onwards:
971 It is strongly recommended that all o32 system libraries are built using the
972 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
973 with the original and all new o32 ABI extensions. Configure a MIPS GCC
974 compiler using --with-fp-32=xx to set this by default.
978 * The following bugs are resolved with this release:
980 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
981 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
982 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
983 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
984 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
985 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
986 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
987 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
988 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
989 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
990 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
991 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
992 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
993 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
994 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
996 * Reverted change of ABI data structures for s390 and s390x:
997 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
998 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
999 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1000 are preserved pointing straight to the same implementation as the old ones.
1001 Given that, new callers will simply provide a too-big buffer to these
1002 functions. Any applications/libraries out there that embed jmp_buf or
1003 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1004 against 2.19 headers will have to rebuilt again. This is necessary in any
1005 case to revert the breakage in their ABI caused by the glibc change.
1007 * Support for file description locks is added to systems running the
1008 Linux kernel. The standard file locking interfaces are extended to
1009 operate on file descriptions, not file descriptors, via the use of
1010 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1011 are associated with an open file instead of a process.
1013 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1015 * The minimum Linux kernel version that this version of the GNU C Library
1016 can be used with is 2.6.32.
1018 * Running the testsuite no longer terminates as soon as a test fails.
1019 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1020 with PASS or FAIL lines for individual tests. A summary of the results is
1021 printed, including a list of failing lists, and "make check" exits with
1022 error status if there were any unexpected failures. "make check
1023 stop-on-test-failure=y" may be used to keep the old behavior.
1025 * The am33 port, which had not worked for several years, has been removed
1028 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1029 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1030 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1031 conflicted with POSIX (support for which was removed in 2.19), the
1032 interfaces those macros enabled remain available when compiling with
1033 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1034 test macros defined.
1036 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1038 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1039 This may improve lock scaling of existing programs on TX capable systems.
1040 The lock elision code is only built with --enable-lock-elision=yes and
1041 then requires a GCC version supporting the TX builtins. With lock elision
1042 default mutexes are elided via __builtin_tbegin, if the cpu supports
1043 transactions. By default lock elision is not enabled and the elision code
1046 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1047 copy the path argument. This allowed programs to cause posix_spawn to
1048 deference a dangling pointer, or use an unexpected pathname argument if
1049 the string was modified after the posix_spawn_file_actions_addopen
1052 * All supported architectures now use the main glibc sysdeps directory
1053 instead of some being in a separate "ports" directory (which was
1054 distributed separately before glibc 2.17).
1056 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1057 On configurations that support it (all Linux configurations), it's now
1058 used regardless of the --enable-add-ons switch to configure. It is no
1059 longer possible to build such configurations without pthreads support.
1061 * Locale names, including those obtained from environment variables (LANG
1062 and the LC_* variables), are more tightly checked for proper syntax.
1063 setlocale will now fail (with EINVAL) for locale names that are overly
1064 long, contain slashes without starting with a slash, or contain ".." path
1065 components. (CVE-2014-0475) Previously, some valid locale names were
1066 silently replaced with the "C" locale when running in AT_SECURE mode
1067 (e.g., in a SUID program). This is no longer necessary because of the
1070 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1071 with application code using Intel MPX instructions. (With all previous
1072 versions, the MPX register state could be clobbered when making calls
1073 into or out of a shared library.) Note that while the new dynamic
1074 linker is compatible with all known x86 hardware whether or not it
1075 supports Intel MPX, some x86 instruction-set emulators might fail to
1076 handle the new instruction encodings. This is known to affect Valgrind
1077 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1078 release), and might affect other tools that do instruction emulation.
1080 * Support for loadable gconv transliteration modules has been removed.
1081 The support for transliteration modules has been non-functional for
1082 over a decade, and the removal is prompted by security defects. The
1083 normal gconv conversion modules are still supported. Transliteration
1084 with //TRANSLIT is still possible, and the //IGNORE specifier
1085 continues to be supported. (CVE-2014-5119)
1087 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1088 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1089 resulting a denial-of-service security vulnerability in applications which
1090 use functions related to iconv. (CVE-2014-6040)
1094 * The following bugs are resolved with this release:
1096 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1097 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1098 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1099 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1100 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1101 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1102 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1103 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1104 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1105 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1106 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1107 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1108 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1109 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1110 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1111 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1112 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1113 16431, 16453, 16474, 16506, 16510, 16529
1115 * Slovenian translations for glibc messages have been contributed by the
1116 Translation Project's Slovenian team of translators.
1118 * The public headers no longer use __unused nor __block. This change is to
1119 support compiling programs that are derived from BSD sources and use
1120 __unused internally, and to support compiling with Clang's -fblock
1121 extension which uses __block.
1123 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1124 large collation sequences to optimize multiple passes. This cache
1125 computation may overflow for large collation sequences and may cause a
1126 stack or buffer overflow. This is now fixed to use a slower algorithm
1127 which does not use a cache if there is an integer overflow.
1129 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1130 rules for large collation sequences to optimize multiple passes and falls
1131 back to alloca if malloc fails, resulting in a possible stack overflow.
1132 The implementation now falls back to an uncached collation sequence lookup
1135 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1136 initialized for static applications resulting in the security feature
1137 being disabled. The pointer guard is now correctly initialized to a
1138 random value for static applications. Existing static applications need
1139 to be recompiled to take advantage of the fix (bug 15754).
1141 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1142 to the d_name member of struct dirent, or omit the terminating NUL
1143 character. (Bugzilla #14699).
1145 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1146 aligned_alloc functions could allocate too few bytes or corrupt the
1147 heap when passed very large allocation size values (Bugzilla #15855,
1150 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1151 for AF_INET6 has been fixed (Bugzilla #16072).
1153 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1154 pap_CW, quz_PE, the_NP.
1156 * Substantially revised locales: gd_GB, ht_HT
1158 * The LC_ADDRESS field was updated to support country_car for almost all
1161 * ISO 1427 definitions were updated.
1163 * ISO 3166 definitions were updated.
1165 * The localedef utility now supports --big-endian and --little-endian
1166 command-line options to generate locales for a different system from that
1167 for which the C library was built.
1169 * Binary locale files now only depend on the endianness of the system for
1170 which they are generated and not on other properties of that system. As a
1171 consequence, binary files generated with new localedef may be incompatible
1172 with old versions of the GNU C Library, and binary files generated with
1173 old localedef may be incompatible with this version of the GNU C Library,
1174 in the following circumstances:
1176 + Locale files may be incompatible on m68k systems.
1178 + Locale archive files (but not separate files for individual locales) may
1179 be incompatible on systems where plain "char" is signed.
1181 * The configure option --disable-versioning has been removed. Builds with
1182 --disable-versioning had not worked for several years.
1184 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1185 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1187 * SystemTap probes for malloc have been introduced.
1189 * SystemTap probes for slow multiple precision fallback paths of
1190 transcendental functions have been introduced.
1192 * Support for powerpc64le has been added.
1194 * The soft-float powerpc port now supports e500 processors.
1196 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1198 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1199 set of header declarations that are enabled by default, even when other
1200 feature test macros or compiler options such as -std=c99 would otherwise
1201 disable some of those declarations.
1203 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1204 conflict with POSIX. The libbsd-compat library (which was a dummy library
1205 that did nothing) has also been removed.
1207 * Preliminary documentation about Multi-Thread, Async-Signal and
1208 Async-Cancel Safety has been added.
1210 * Change of ABI data structures for s390 and s390x:
1211 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1212 allow for future hardware extensions. All library functions that accept or
1213 return these structures were versioned in order to provide backwards
1214 compatibility with existing code. However, not all cases can be handled
1215 with interface versioning. If an application embeds either structure into
1216 another structure and that structure is passed to another compilation unit
1217 which expects the newer larger-sized object then any access to the new
1218 fields will result in undefined behaviour. Similarly any access to fields
1219 that were moved by the enlarging of the structures will cause undefined
1220 behaviour. To fix the undefined behaviour all objects that are part of the
1221 final in-memory image must agree on the size of structures, and this may
1222 require recompilation.
1226 * The following bugs are resolved with this release:
1228 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1229 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1230 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1231 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1232 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1233 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1234 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1235 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1236 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1237 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1238 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1239 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1240 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1243 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1244 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1245 Distributions can re-enable building and using pt_chown via the new configure
1246 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1247 considerable security risks and should only be used if the distribution
1248 understands and accepts the risks.
1250 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1253 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1254 fixed (Bugzilla #15330).
1256 * Add support for calling C++11 thread_local object destructors on thread
1257 and program exit. This needs compiler support for offloading C++11
1258 destructor calls to glibc.
1260 * Improved worst case performance of libm functions with double inputs and
1263 * Support for priority inherited mutexes in pthread condition variables on
1264 non-x86 architectures.
1266 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1268 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1270 * Optimized string functions for ARM. Implemented by Will Newton and
1273 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1275 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1278 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1279 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1281 * Added a benchmark framework to track performance of functions in glibc.
1283 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1284 It is based on draft TS 18661 and currently enabled as a GNU extension.
1286 * On Linux, the clock function now uses the clock_gettime system call
1287 for improved precision, rather than old times system call.
1289 * Added support for version-3 tz format files. This is needed when using
1290 the tz database release 2013e or later, and affects a few unusual cases --
1291 currently only TZ='America/Godthab' for time stamps after 2037.
1293 * Added new API functions pthread_getattr_default_np and
1294 pthread_setattr_default_np to get and set the default pthread
1295 attributes of a process.
1297 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1298 This may improve lock scaling of existing programs on TSX capable systems.
1299 When the --enable-lock-elision=yes parameter is specified at configure
1300 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1303 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1304 availability). Implemented by Ryan S. Arnold.
1306 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1310 * The following bugs are resolved with this release:
1312 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1313 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1314 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1315 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1316 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1317 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1318 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1319 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1320 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1321 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1322 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1323 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1324 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1325 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1326 14879, 14889, 14893, 14898, 14914.
1328 * Optimization of memcpy for MIPS.
1330 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1331 EMFILE has been fixed (Bugzilla #14889).
1333 * The add-on ports collection is now distributed in the "ports" subdirectory
1334 of the main GNU C Library distribution, rather than separately.
1336 * Port to ARM AArch64 contributed by Linaro.
1338 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1339 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1341 Implemented by Andreas Krebbel.
1343 * The new function secure_getenv allows secure access to the environment,
1344 returning NULL if running in a SUID/SGID process. This function replaces
1345 the internal function __secure_getenv.
1347 * SystemTap static probes have been added into the dynamic linker.
1348 Implemented by Gary Benson.
1350 * Optimizations of string functions strstr, strcasestr and memmem.
1351 Implemented by Maxim Kuvyrkov.
1353 * The minimum Linux kernel version that this version of the GNU C Library
1354 can be used with is 2.6.16.
1356 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1357 powerpc POWER7. Implemented by Will Schmidt.
1359 * New configure option --disable-nscd builds the C library such that it
1360 never attempts to contact the Name Service Caching Daemon (nscd).
1361 New configure option --disable-build-nscd avoids building nscd itself;
1362 this is the default if --disable-nscd is used.
1364 * Improved support for cross-compilation, including cross-testing and
1365 bootstrap builds without a previously built glibc.
1367 * Several testsuite tests are now able to test multiple IFUNC variants of an
1368 interface, rather than just testing the one that would be chooen by
1371 * New configure options --with-bugurl and --with-pkgversion, for
1372 distributors to use to embed their bug-reporting and package version
1373 information in --help and --version output.
1375 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1376 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1377 allows creation of chroots without the procfs mounted on /proc.
1379 * The `crypt' function now fails if passed salt bytes that violate the
1380 specification for those values. On Linux, the `crypt' function will
1381 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1382 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1383 when the mode is enabled.
1385 * The `clock_*' suite of functions (declared in <time.h>) is now available
1386 directly in the main C library. Previously it was necessary to link with
1387 -lrt to use these functions. This change has the effect that a
1388 single-threaded program that uses a function such as `clock_gettime' (and
1389 is not linked with -lrt) will no longer implicitly load the pthreads
1390 library at runtime and so will not suffer the overheads associated with
1391 multi-thread support in other code such as the C++ runtime library.
1393 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1398 * The following bugs are resolved with this release:
1400 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1401 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1402 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1403 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1404 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1405 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1406 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1407 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1408 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1409 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1410 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1411 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1412 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1413 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1414 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1415 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1416 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1417 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1418 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1419 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1420 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1421 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1424 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1425 configuring glibc with:
1426 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1427 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1428 Implemented by H.J. Lu.
1432 + define static_assert
1434 + do not declare gets
1436 + declare at_quick_exit and quick_exit also for ISO C11
1438 + aligned_alloc. NB: The code is deliberately allows the size parameter
1439 to not be a multiple of the alignment. This is a moronic requirement
1440 in the standard but it is only a requirement on the caller, not the
1443 + timespec_get added
1445 + uchar.h support added
1447 + CMPLX, CMPLXF, CMPLXL added
1449 Implemented by Ulrich Drepper.
1451 * Support for the IA-64 has been moved to ports.
1453 * Remove support for anything but ELF binary format
1455 * Checking versions of poll, ppoll added.
1456 Implemented by Ulrich Drepper.
1458 * More generic and 64-bit performance optimizations to math functions.
1459 Implemented by Ulrich Drepper.
1461 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1462 headers and functions available at compile time as they were before
1463 version 2.14. This option will be removed at some time in the future
1464 after the TI-RPC library becomes fully sufficient for the needs of
1465 existing applications.
1467 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1468 Note that glibc is not expected to work with any Linux kernel version
1471 * New header <sys/auxv.h> and function getauxval allowing easy access to
1472 the AT_* key-value pairs passed from the Linux kernel. The header also
1473 defines the HWCAP_* bits associated with the AT_HWCAP key.
1475 * New locales: mag_IN
1477 * New configure option --enable-systemtap builds SystemTap static probes
1478 into libc for setjmp and longjmp and into libpthread for various operations.
1479 So far the setjmp/longjmp probes and some of the libpthread probes are
1480 provided only for i*86 and x86_64.
1481 Implemented by Roland McGrath and Rayson Ho.
1483 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1485 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1488 * More optimized functions for SPARC. Implemented by David S. Miller.
1490 * Improved support for cross-compilation, especially bootstrap builds
1491 without a previously built glibc.
1493 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1494 Chris Metcalf from Tilera.
1496 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1497 now supported for ARM processors.
1499 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1500 as the name of the dynamic linker, to distinguish it from the
1501 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1503 * Support for CRIS has been removed from ports.
1505 * A new class of installed header has been documented for low-level
1506 platform-specific functionality. PowerPC added the first instance with a
1507 function to provide time base register access. Contributed by Tulio
1508 Magno Quites Machado Filho.
1510 * ix86 configurations now install header files that are consistent with
1511 what x86-64 configurations install. These same header files can be used
1512 for -m32, -m64, or -mx32 builds.
1513 Contributed by H.J. Lu.
1515 * Math library bug fixes. A thorough audit of all open math library bugs was
1516 conducted by Joseph Myers. Significant progress was made on many math
1517 library bugs resulting in more accurate exceptions and function results.
1518 Many thanks to all those that contributed including Andreas Jaeger for his
1519 patch review and work on the x87 trigonometric instruction issues.
1521 * Timezone data is no longer installed. Timezone-related binaries and scripts
1522 will continue to be installed. Users should obtain their timezone data from
1523 their distribution provider or from the tzdata package at
1524 <ftp://munnari.oz.au/pub/>.
1528 * The following bugs are resolved with this release:
1530 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1531 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1532 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1533 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1534 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1535 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1536 13484, 13506, 13515, 13523, 13524, 13538, 13540
1538 * New program pldd to list loaded object of a process
1539 Implemented by Ulrich Drepper.
1541 * Add nss_db support back to glibc. No more dependency on Berkeley db
1542 and support for initgroups lookups.
1543 Implemented by Ulrich Drepper.
1545 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1546 Contributed by HJ Lu.
1548 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1549 Contributed by HJ Lu.
1551 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1552 on x86-32 and x86-64.
1553 Contributed by Liubov Dmitrieva.
1555 * Optimized strchr and strrchr for SSE on x86-32.
1556 Contributed by Liubov Dmitrieva.
1558 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1559 for x86-64 and x86-32.
1560 Contributed by Liubov Dmitrieva.
1562 * New interfaces: scandirat, scandirat64
1563 Implemented by Ulrich Drepper.
1565 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1566 Implemented by Ulrich Drepper.
1568 * nscd now also caches the netgroup database.
1569 Implemented by Ulrich Drepper.
1571 * Integrate libm with gcc's -ffinite-math-only option.
1572 Implemented by Ulrich Drepper.
1574 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1575 to math functions. Implemented by Ulrich Drepper.
1577 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1578 Implemented by Ulrich Drepper.
1580 * New Linux interfaces: process_vm_readv, process_vm_writev
1582 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1583 Implemented by Ulrich Drepper.
1585 * Optimized nearbyint and strcasecmp for PPC.
1586 Implemented by Adhemerval Zanella.
1588 * New locales: bho_IN, unm_US, es_CU, ta_LK
1592 * The following bugs are resolved with this release:
1594 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1595 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1596 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1597 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1598 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1599 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1600 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1601 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1602 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1603 12795, 12811, 12813, 12814, 12841
1605 * The RPC implementation in libc is obsoleted. Old programs keep working
1606 but new programs cannot be linked with the routines in libc anymore.
1607 Programs in need of RPC functionality must be linked against TI-RPC.
1608 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1610 Visible changes of this change include (obviously) the inability to link
1611 programs using RPC functions without referencing the TI-RPC library and the
1612 removal of the RPC headers from the glibc headers.
1613 Implemented by Ulrich Drepper.
1615 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1616 syncfs, setns, sendmmsg
1618 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1619 yue_HK, lij_IT, mhr_RU
1621 * New encodings: CP770, CP771, CP772, CP773, CP774
1623 * New program sotruss to trace calls through PLTs
1624 Implemented by Ulrich Drepper.
1626 * The malloc hook implementation is marked deprecated and will be removed
1627 from the default implementation in the next version. The design never
1628 worked ever since the introduction of threads. Even programs which do
1629 not create threads themselves can use multiple threads created internally.
1633 * The following bugs are resolved with this release:
1635 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1636 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1637 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1638 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1641 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1643 * POWER7 optimizations: memset, memcmp, strncmp
1645 * New optimized string functions for x86-64: strnlen (SSE2),
1646 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1647 Implemented by Ulrich Drepper.
1651 * The following bugs are resolved with this release:
1653 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1654 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1655 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1656 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1657 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1658 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1659 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1660 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1662 * New interfaces: pthread_getname_np, pthread_setname_np
1664 * New Linux interface: recvmmsg
1666 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1668 * The dynamic linker now recognizes supported ABI versions from the
1669 EI_ABIVERSION field in the ELF header.
1670 Implemented by Ulrich Drepper.
1672 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1673 will not be used to fill in password fields in the passwd.byname replies.
1674 Instead it is used to synthesize the shadow.byname table, should it be
1675 missing. This is a useful mode in some installations involving Solaris.
1676 Implemented by Ulrich Drepper.
1678 * New locales: kok_IN, sq_MK, cv_RU
1682 * The following bugs are resolved with this release:
1684 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1685 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1686 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1687 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1688 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1689 10789, 10817, 10823, 10840, 10847
1691 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1693 Implemented by Ulrich Drepper.
1695 * Checking version of longjmp added that fails if an uninitialized stack
1696 frame would be created. Implemented by Ulrich Drepper.
1698 * STT_GNU_IFUNC is now supported in static executables.
1699 Implemented by H.J. Lu.
1701 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1703 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1704 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1705 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1706 Contributed by H.J. Lu.
1708 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1709 Implemented by Ulrich Drepper.
1711 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1713 Contributed by H.J. Lu.
1715 * Support for fma instruction in AVX on x86-64.
1716 Implemented by H.J. Lu and Ulrich Drepper.
1718 * AVX support in x86-64 auditing support in ld.so.
1719 Implemented by H.J. Lu.
1721 * STB_GNU_UNIQUE support added.
1722 Implemented by Ulrich Drepper.
1724 * Implement second fallback mode for optimized DNS lookup for even more
1725 broken environments. If two requests from the same port are not
1726 handled correctly close the socket and open a new one before sending
1727 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1728 can be used to select this mode right away, instead of rediscovering the
1729 necessity is every process again.
1730 Implemented by Ulrich Drepper.
1732 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1733 Implemented by Adam Tkac.
1735 * Optimized iconv conversions for S390x.
1736 Implemented by Andreas Krebbel.
1738 * Using condvars with PI mutexes is now more efficient due to kernel
1739 support for requeueing to PI futexes. NPTL support added for x86-64.
1740 Implemented by Ulrich Drepper.
1742 * New locales: ps_AF, my_MM
1746 * The following bugs are resolved with this release:
1748 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1749 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1750 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1751 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1752 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1754 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1755 Implemented by Ulrich Drepper.
1757 * New Linux interfaces: accept4, fallocate, fallocate64.
1758 Implemented by Ulrich Drepper.
1760 * Correct declarations of string function when used in C++ code. This
1761 could lead to compile errors for invalid C++ code.
1763 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1766 * New POSIX 2008 interface: psiginfo
1767 Implemented by Ulrich Drepper.
1769 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1770 Implemented by Ulrich Drepper.
1772 * Support for selecting between multiple function definitions at runtime
1773 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1775 * The libcrypt library can now use the hash function implementations in
1776 NSS. Implemented by Ulrich Drepper.
1778 * The malloc implementation can be compiled to be less memory efficient
1779 but higher performing in multi-threaded programs.
1780 Implemented by Ulrich Drepper.
1782 * New locales: nan_TW@latin, ks_IN
1784 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1785 Implemented by Ulrich Drepper.
1787 * Extended printf hook support. It is possible to use user-defined types
1788 and extend existing format specifiers.
1789 Implemented by Ulrich Drepper.
1791 * Handling for group shadow files has been added.
1792 Implemented by Ulrich Drepper.
1794 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1795 servers (the case, e.g., for some people using the built-in DNS
1796 server in ADSL modems/routers). There is a once-per-process timeout
1797 in case of a broken server. To avoid it, users can run nscd or put
1798 'options single-request' in /etc/resolv.conf.
1799 Implemented by Ulrich Drepper.
1803 * The following bugs are resolved with this release:
1805 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1806 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1807 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1808 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1809 6968, 6974, 6980, 6995, 7008, 7009, 7029
1811 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1812 up at the same time. Implemented by Ulrich Drepper.
1814 * TLS descriptors for LD and GD on x86 and x86-64.
1815 Implemented by Alexandre Oliva.
1817 * getaddrinfo now handles DCCP and UDPlite.
1818 Implemented by Ulrich Drepper.
1820 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1821 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1822 Implemented by Ulrich Drepper.
1824 * New implementation of memmem, strstr, and strcasestr which is O(n).
1825 Implemented by Eric Blake.
1827 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1829 * Implement "e" option for popen to open file descriptor with the
1830 close-on-exec flag set. Implemented by Ulrich Drepper.
1832 * Implement "b" mode for fmemopen. In this mode writes writes don't
1833 implicitly add a NUL byte and seeks from the end of the buffer really
1834 use the buffer end, not the string length as the basis.
1835 Implemented by Ulrich Drepper.
1837 * Many functions, exported and internal, now atomically set the close-on-exec
1838 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1840 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1842 Implemented by Pravin Satpute.
1844 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1848 * The following bugs are resolved with this release:
1850 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1851 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1852 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1853 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1854 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1855 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1856 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1858 * New locales: bo_CN, bo_IN, shs_CA.
1860 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1862 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1863 Implemented by Pravin Satpute.
1865 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1867 * nscd caches now all timeouts for DNS entries
1868 Implemented by Ulrich Drepper.
1870 * nscd is more efficient and wakes up less often.
1871 Implemented by Ulrich Drepper.
1873 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1874 vdprintf, and obstack_vprintf.
1875 Implemented by Jakub Jelinek.
1877 * Faster memset for x86-64.
1878 Implemented by Harsha Jagasia and H.J. Lu.
1880 * Faster memcpy on x86.
1881 Implemented by Ulrich Drepper.
1883 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1884 Implemented by Ulrich Drepper.
1886 * Faster sqrt and sqrtf implemention for some PPC variants.
1887 Implemented by Steven Munroe.
1891 * The following bugs are resolved with this release:
1893 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1894 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1895 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1896 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1897 5071, 5103, 5104, 5112, 5113, 5184, 5186
1899 * More checking functions: fread, fread_unlocked, open*, mq_open.
1900 Implemented by Jakub Jelinek and Ulrich Drepper.
1902 * Extend fortification to C++. Implemented by Jakub Jelinek.
1904 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1905 by not recognizing 'a' as a modifier when those specs are requested.
1906 Implemented by Jakub Jelinek.
1908 * PPC optimizations to math and string functions.
1909 Implemented by Steven Munroe.
1911 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1912 options to be passed. Implemented by Ulrich Drepper.
1914 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1916 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1917 Implemented by Ulrich Drepper.
1919 * Handle private futexes in the NPTL implementation.
1920 Implemented by Jakub Jelinek and Ulrich Drepper.
1922 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1923 Implemented by Roland McGrath and Ulrich Drepper.
1925 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1927 * SHA-256 and SHA-512 based password encryption.
1928 Implemented by Ulrich Drepper.
1930 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1931 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1934 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1935 Implemented by Ulrich Drepper.
1939 * The following bugs are resolved with this release:
1941 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1942 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1943 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1944 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1945 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1946 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1947 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1950 * New Linux interfaces: epoll_pwait, sched_getcpu.
1952 * New generic interfaces: strerror_l.
1954 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1958 * The following bugs are resolved with this release:
1960 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1961 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1962 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1963 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1964 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1965 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1966 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1967 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1968 3225, 3251, 3252, 3253, 3273
1970 * For Linux, the sorting of addresses returned by getaddrinfo now also
1971 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1972 Implemented by Ulrich Drepper.
1974 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1975 Implemented by Ulrich Drepper.
1977 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1979 * New iconv module for MIK. Contributed by Alexander Shopov.
1981 * For sites with broken group and/or passwd database, the auto-propagate
1982 option of nscd can prevent creating ID lookup entries from the results
1983 of a name lookup and vice versa. This usually is no problem but some
1984 site might have problems with the default behavior.
1985 Implemented by Ulrich Drepper.
1987 * Iterating over entire database in NIS can be slow. With the
1988 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1989 to trade time for memory. The entire database will be read at once.
1990 Implemented by Ulrich Drepper.
1992 * The interfaces introduced in RFC 3542 have been implemented by
1995 * Support for the new ELF hash table format was added by Ulrich Drepper.
1997 * Support for priority inheritance mutexes added by Jakub Jelinek and
2000 * Support for priority protected mutexes added by Jakub Jelinek.
2002 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2003 or_IN, csb_PL, fy_NL, sr_ME.
2007 * More overflow detection functions.
2009 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2010 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2012 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2013 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2014 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2015 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2016 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2017 by Masahide Washizawa.
2019 * It is now possible to install audit libraries for the dynamic linker using
2020 LD_AUDIT. Implemented by Ulrich Drepper.
2022 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2023 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2024 For a libc and libpthread that works well on Linux 2.4 kernels, we
2025 recommend using the stable 2.3 branch.
2027 * The new function open_wmemstream acts like open_memstream,
2028 but uses a wchar_t wide character buffer.
2030 * The new function ppoll is an improved version of poll, similar to pselect.
2032 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2033 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2034 renameat, unlinkat, linkat, symlinkat, readlinkat.
2036 * New Linux kernel system calls: unshare,
2037 inotify_init, inotify_add_watch, inotify_rm_watch.
2039 * The euidaccess function is now also known by the alias eaccess,
2040 for compatibility with some other systems.
2042 * Timezone data updated to 2006b version.
2046 * The following bugs are resolved with this release:
2048 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2049 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2050 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2051 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2052 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2053 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2055 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2057 * As of this release, GCC 4 can be used to compile the C Library.
2059 * Timezone data updated to 2005m version.
2063 * The following bugs are resolved with this release:
2065 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2066 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2067 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2068 777, 787, 821, 822, 823, 825
2070 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2074 * Support for RFC 3678. Real implementations exist only for Linux so far.
2075 Implemented by Ulrich Drepper.
2077 * nscd can now cache entries persistently. Expiring entries are reloaded.
2078 For speedups the cache can be shared in memory with client processes.
2079 Implemented by Ulrich Drepper.
2081 * nscd can now perform SELinux checks.
2082 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2084 * getaddrinfo queries are now cached. Canonical name lookup is performed
2086 Implemented by Ulrich Drepper.
2088 * The nothrow function attribute is used when headers are used by gcc when
2089 compiling C code. This can avoid significant amounts of exception
2092 * The malloc functions perform more error checking and are stricter when
2093 it comes to reacting on errors. The default action is to terminate
2094 the process after showing an error message. Implemented by Ulrich Drepper.
2096 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2097 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2099 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2100 namespaces using the new function dlmopen(). This feature is of course,
2101 like most other dynamic loading functionality, not available in statically
2102 linked applications. Implemented by Ulrich Drepper.
2104 * Low-overhead boundary checking variants of string and some stdio functions
2105 were added. These are to be used in conjunction with a gcc patch by
2106 Jakub Jelinek which adds calls to these functions if possible.
2107 Implemented by Jakub Jelinek and Ulrich Drepper.
2109 * Old code for several operating systems and machine architectures that
2110 have not been in working condition in a long time have been removed from
2111 the main source tree maintained by the GNU C Library's maintainers.
2112 These files are now reside in the separate `ports' source module
2113 that is usable as an add-on when building the library.
2117 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2118 interrogate the dynamic linker, compatible with the Solaris interface.
2120 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2121 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2123 * getifaddrs now uses the netlink interface on Linux to get its information.
2124 Implemented by Thorsten Kukuk.
2126 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2127 Implemented by Ulrich Drepper.
2129 * support for non-executable stacks on x86 has been added. Changes mostly
2132 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2135 * getaddrinfo now performs destination address selection according to
2140 * Thread-safe interfaces for many functions that access locale data
2141 were added in version 2.3, but these features were omitted from NEWS.
2142 Many functions have variants with an `_l' suffix that take a `locale_t'
2143 object as a parameter rather than consulting the current locale.
2144 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2145 create and maintain `locale_t' objects. Additionally, the new function
2146 `uselocale' sets "the current locale" (as used by functions not so
2147 parameterized) set for an individual thread. These features were added
2148 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2150 * The functions getresuid, getresgid, setresuid, and setresgid, which
2151 have long been available on Linux, are now declared in <unistd.h>
2152 and are now also available on the Hurd.
2154 * ELF thread-local storage support (TLS) now works on x86-64.
2156 * The new dynamic string token $LIB is expanded in shared library names.
2157 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2159 * Aldy Hernandez contributed complete software floating point support for
2160 PowerPC machines with no FPU.
2162 * fexecve is implemented on Linux.
2164 * The `btowc' function should work at least twice as fast due to
2165 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2167 * With approriate thread add-ons cancelable functions are now implemented
2168 in libc.so as well. No need to call the function in libpthread. This
2169 change allowed to finally disable the incorrect and expensive handling
2170 of weak definition in ld.so.
2172 * Yet more PLT entries in libc.so have been removed. We finally arrived
2173 at the bare minimum. Startup times improved appropriately.
2175 * Support for the new Linux/x86 system call interface was added. The
2176 AT_SYSINFO auxiliary vector entry is recognized and handled.
2180 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2183 * iconv (the program and the interface) now accepts empty names (excluding
2184 options like //TRANSLIT) to mean "use charset of current locale".
2186 * localedef can now transliterate characters in strings which are not in
2187 the provided charmap. The information from the input locale is used.
2189 * Prelinking support was added for ELF targets. This requires additional
2190 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2192 * Read-only stdio streams now use mmap to speed up operation by eliminating
2193 copying and buffer underflows. To use add 'm' to the mode string of
2194 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2196 * The malloc functions were completely rewritten by Wolfram Gloger based
2197 on Doug Lea's malloc-2.7.0.c.
2199 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2200 implementation of regex.
2202 * Bruno Haible upgraded the iconv and locale implementation to support
2205 * Contents of the LC_* and LANG environment variables in the CEN style are
2206 not recognized anymore. It never was used. Change by Ulrich Drepper.
2208 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2209 thread-local storage (TLS) ABI on some platforms.
2210 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2212 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2213 EUC-JISX0213, and TSCII.
2215 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2216 BSD-compatible interface for getting all network interface addresses.
2217 Implementation for IPv4 by Roland McGrath.
2219 * Loading of locale data is faster due to the introduction of a locale
2220 archive. Implemented by Roland McGrath and Ulrich Drepper.
2222 * Startup times are significantly reduced by not using exported functions
2223 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2226 * Steven Munroe contributed a port to PowerPC64/Linux.
2230 * The Hurd now uses the GNU libio implementation of stdio rather than the
2231 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2233 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2234 with the same behavior as the Linux system call of the same name.
2238 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2239 128-bit long double format.
2241 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2242 IBM1161, and IBM1162 charsets.
2244 * Andreas Jaeger contributed a port to x86-64/Linux.
2246 * Peter Bruin contributed a port to PowerPC/Hurd.
2248 * libc functions using I/O streams now can handle wide-oriented streams
2251 * optimizations in the dynamic linker. Binaries created by recent binutils
2252 versions start up quicker due to reduced time spent on relocations.
2254 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2258 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2259 asinh, atanh, j0 for the 128-bit long double format.
2261 * Bruno Haible updated all the code handling Unicode in some form to
2262 support Unicode 3.1.
2264 * Speed of regex for single-byte locales is back to previous levels.
2265 Patch by Isamu Hasegawa.
2267 * Alpha, SPARC, and IA-64 now also using floating stacks.
2269 * Startup time of internationalized applications greatly improved through
2270 iconv cache. Use iconvconfig to generate the cache file.
2271 Contributed by Ulrich Drepper.
2273 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2274 severe performance problems. Patch by David Mosberger.
2276 * The Hurd port got a lot more functionality like AIO, various stdio
2277 extensions, etc. Mainly done by Roland McGrath.
2279 * mtrace can now lookup symbols in shared libraries.
2283 * Intel's IA-64 math library is largely integrated. It provides fast and
2284 accurate implementatations for most basic and standard math functions
2285 in float, double, and long double format.
2287 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2288 and asin for the 96-bit long double format and asin, log, tan for the
2289 128-bit long double format.
2291 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2292 The basic double functions exist today. Contributed by Abraham Ziv
2293 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2294 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2296 * An asynchronous name lookup library was added. The interface is designed
2297 after POSIX AIO. The proposal was circulated beforehand to get comments.
2298 No negative ones came in. Implemented by Ulrich Drepper.
2300 * Port to S390/64bit contributed by Martin Schwidefsky
2301 <schwidefsky@de.ibm.com>.
2303 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2304 of functions for Linux/IA-64.
2306 * The RPC code is now thread safe. Threads can now use the same service
2307 of different services at the same time. Patch by Eric Norum
2308 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2310 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2311 family of functions for Linux/S390.
2313 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2314 of functions for Linux/x86.
2316 * Port to Linux/CRIS contributed by Axis Communications.
2320 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2321 we can now check for namespace violations and missing declarations. The
2322 result is that almost all headers are now Unix-compliant (as defined in
2323 the upcoming XPG6). The negative side is that some programs might need
2324 corrections, too, if they depend on the incorrect form of the headers in
2325 previous versions which defined too many symbols and included too many
2328 * regex now handles multibyte character sets correctly.
2329 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2331 * iconv (the program) does now conform to the upcoming XPG6 and handles
2332 charmaps. Instead of the charset names the path of charmaps can be
2333 provided and the conversion happens based on this data.
2334 Contributed by Ulrich Drepper.
2336 * The locale program now provides detailed information about the installed
2341 only lists the names of the supported locales
2345 provides details such as country, language, and codeset name.
2346 Contributed by Ulrich Drepper.
2350 * The gencat program now parses the input file according to the charset
2351 selected by the LC_CTYPE category. This is important for stateful
2352 character sets. To make generating catalogs easier there is a way
2353 to overwrite the charset selected by the locale: before the first
2354 message or $ quote line the catalog can contain a line like
2356 $ codeset=ISO-8859-2
2358 to select the charset (ISO-8859-2 in this case).
2360 Implemented by Shinya Hanataka and Ulrich Drepper.
2362 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2363 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2364 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2366 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2367 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2369 * The LANGUAGE environment variable is now ignored unless the locale is
2370 changed from the default "C" locale.
2372 * The usual bug fixes.
2376 * Greg McGary added runtime support for bounds checking using gcc's
2377 new -fbounded-pointers option. ix86 target is complete. PowerPC
2380 * Thorsten Kukuk added secure mode support to nscd.
2382 * The Berkeley db libraries have been removed.
2384 Related, the nss_db module is now in a separate package since it
2385 obviously requires a database library being available.
2387 * Wide character I/O streams implemented by Ulrich Drepper.
2389 * Functions from the extended socket API added by Ulrich Drepper.
2391 * Functions feenableexcept and fedisableexcept to control the
2392 behaviour of individual exceptions have been added by Andreas Jaeger.
2394 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2396 * The resolver code has been updated from bind 8.2.3-T5B which supports
2397 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2400 This change could in some situations effect backward compatibility. Since
2401 now `_res' is a thread-local instead of a global variable, modifying it
2402 in one thread does not have any effect in other threads.
2404 The resolver library was also extended to allow IPv6 as the transport
2405 protocol for the requests. This work was done by Stig Venaas.
2407 * Compatibility code for K&R C compilers has been removed from the
2408 header files. A ISO C compiler is needed to use the library
2409 (conforming to either C89 or C99 standard).
2411 * Complete rewrite of the localedef program to support multibyte character
2412 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2413 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2414 Implemented by Ulrich Drepper.
2416 Bruno Haible significantly improved the generation and use of the data
2417 structures for the wide character tables.
2419 * Plural handling in gettext implemented by Ulrich Drepper.
2421 * The utmp daemon has been removed.
2423 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2425 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2428 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2430 * POSIX barriers implemented by Kaz Kylheku.
2432 * POSIX spawn function family implemented by Ulrich Drepper.
2434 * POSIX spinlocks are now available.
2436 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2438 * the configure option --enable-kernel=X.Y.Z allows to strip out
2439 compatibility for kernel versions before X.Y.Z. This is currently only
2440 implemented for Linux.
2442 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2443 field sin6_scope_id. This means that all programs using IPv6 should be
2444 recompiled. Don't expect binary compatibility with previous glibc
2447 * various conversion modules for IBM character sets contributed by
2450 * IA-64 port by Jes Sorensen and HJ Lu.
2464 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2466 * New xdr functions are added; some rpc functions are now 64bit clean.
2468 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2470 * Fixed known incompatibilities with glibc 2.0.
2472 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2474 * Optimized a number of functions (especially the ELF dynamic loader).
2476 * Update timezone data files.
2478 * lots of charmaps corrections
2480 * some new locale definitions and charmaps
2485 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2486 conform to POSIX member type requirements. Symbol versions have been
2487 adjusted as needed within the library, and for direct use by applications,
2488 but there is potential for problems if third-party libraries use
2489 struct timeval as part of their interface. This does not present
2490 a problem for X and other "essential" system libraries.
2492 * An additional locale model to support C++ Standard Library locale
2493 model and probably more was implemented by Ulrich Drepper.
2495 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2498 * Miles Bader provided the `argp' function family to support hierachical
2499 command line argument parsing, layered on top of getopt.
2501 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2503 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2506 * scanf recognizes the %a and %A format for scanning floating point numbers.
2508 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2509 information and interfaces for the available integer types.
2511 * about 130 new math functions were added to implement the ISO C9x math
2514 * the new header <complex.h> contains definitions of the complex math
2515 functions from ISO C 9X.
2517 * the new header <tgmath.h> defines generic macros to use complex or
2518 real valued functions.
2520 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2522 * Andreas Jaeger provided a test suite for the math library.
2524 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2526 * Ulrich Drepper added character set conversion functions (iconv).
2528 * Optimized string functions have been added.
2530 * The localedata addon is now part of glibc.
2532 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2534 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2535 daemon for NSS (nscd).
2537 Missing a better place here are some numbers on improvements. Under
2538 Linux 2.1.125 un-tar-ing the kernel sources takes
2542 using local files 12.19s 6.88s 22.91s
2544 using NIS 13.92s 8.91s 26.34s
2546 using NIS & nscd 10.37s 7.34s 25.30s
2548 using NIS+ 27.57s 30.37s 640.46s
2550 using NIS+ & nscd 10.25s 7.83s 26.51s
2552 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2554 Keep in mind that non-namelookup related operations dominate above times.
2555 It was just a common complain that using NIS+ unpacking the kernel is
2558 [1] The old nscd implementation is not available anymore since it was
2559 distributed with glibc up to version 2.0.98 and thus is now replaced.
2561 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2563 * Mark Kettenis provided a Hesiod NSS module.
2565 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2566 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2568 * rcmd can now handle netgroups (Dick Streefland).
2570 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2573 * Support for the IPv6 protocol has been added to the socket API, as per the
2574 latest draft standards.
2576 * Support for Linux 2.2 has been added.
2578 * Interface changes relative to the latest 2.0.x release:
2579 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2580 addseverity NEW: Unix98
2581 alphasort64 NEW: LFS
2582 argp_err_exit_status NEW: argp, GNU ext
2583 argp_error NEW: argp, GNU ext
2584 argp_failure NEW: argp, GNU ext
2585 argp_help NEW: argp, GNU ext
2586 argp_parse NEW: argp, GNU ext
2587 argp_program_bug_address NEW: argp, GNU ext
2588 argp_program_version NEW: argp, GNU ext
2589 argp_program_version_hook NEW: argp, GNU ext
2590 argp_state_help NEW: argp, GNU ext
2591 argp_usage NEW: argp, GNU ext
2592 authdes_create NEW: Secure RPC
2593 authdes_getucred NEW: Secure RPC
2594 authdes_pk_create NEW: Secure RPC
2595 backtrace NEW: GNU ext.
2596 backtrace_symbols NEW: GNU ext.
2597 backtrace_symbols_fd NEW: GNU ext.
2599 cacosf NEW: ISO C 9x
2600 cacosh NEW: ISO C 9x
2601 cacoshf NEW: ISO C 9x
2602 cacoshl NEW: ISO C 9x
2603 cacosl NEW: ISO C 9x
2610 casinf NEW: ISO C 9x
2611 casinh NEW: ISO C 9x
2612 casinhf NEW: ISO C 9x
2613 casinhl NEW: ISO C 9x
2614 casinl NEW: ISO C 9x
2616 catanf NEW: ISO C 9x
2617 catanh NEW: ISO C 9x
2618 catanhf NEW: ISO C 9x
2619 catanhl NEW: ISO C 9x
2620 catanl NEW: ISO C 9x
2621 cbc_crypt NEW: Secure RPC
2625 ccoshf NEW: ISO C 9x
2626 ccoshl NEW: ISO C 9x
2632 cimagf NEW: ISO C 9x
2633 cimagl NEW: ISO C 9x
2634 clearerr_locked REMOVED
2635 clntunix_create NEW: sunrpc ext
2637 clog10 NEW: ISO C 9x
2638 clog10f NEW: ISO C 9x
2639 clog10l NEW: ISO C 9x
2649 cprojf NEW: ISO C 9x
2650 cprojl NEW: ISO C 9x
2652 crealf NEW: ISO C 9x
2653 creall NEW: ISO C 9x
2658 csinhf NEW: ISO C 9x
2659 csinhl NEW: ISO C 9x
2662 csqrtf NEW: ISO C 9x
2663 csqrtl NEW: ISO C 9x
2667 ctanhf NEW: ISO C 9x
2668 ctanhl NEW: ISO C 9x
2670 des_setparity NEW: Secure RPC
2671 ecb_crypt NEW: Secure RPC
2672 endutxent NEW: Unix98
2674 exp10f NEW: ISO C 9x
2675 exp10l NEW: ISO C 9x
2679 fattach NEW: STREAMS
2680 fdetach NEW: STREAMS
2684 feclearexcept NEW: ISO C 9x
2685 fegetenv NEW: ISO C 9x
2686 fegetexceptflag NEW: ISO C 9x
2687 fegetround NEW: ISO C 9x
2688 feholdexcept NEW: ISO C 9x
2690 feraiseexcept NEW: ISO C 9x
2691 ferror_locked REMOVED
2692 fesetenv NEW: ISO C 9x
2693 fesetexceptflag NEW: ISO C 9x
2694 fesetround NEW: ISO C 9x
2695 fetestexcept NEW: ISO C 9x
2696 feupdateenv NEW: ISO C 9x
2697 fflush_locked REMOVED
2701 fgets_unlocked NEW: GNU ext.
2702 fileno_locked REMOVED
2714 fputc_locked REMOVED
2715 fputs_unlocked NEW: GNU ext.
2716 fread_unlocked NEW: GNU ext.
2721 fstatvfs NEW: Unix98
2725 ftruncate64 NEW: LFS
2727 fwrite_unlocked NEW: GNU ext.
2728 gai_strerror NEW: IPv6
2732 getchar_locked REMOVED
2734 getdate_err NEW: Unix98
2735 getdate_r NEW: GNU ext.
2737 getnameinfo NEW: IPv6
2738 getnetname NEW: Secure RPC
2739 getpmsg NEW: STREAMS
2740 getpt NEW: Unix98 PTY
2741 getrlimit64 NEW: LFS
2742 getutxent NEW: Unix98
2743 getutxid NEW: Unix98
2744 getutxline NEW: Unix98
2745 glob64 NEW: GNU ext.
2746 globfree64 NEW: GNU ext.
2747 gnu_get_libc_release NEW: GNU ext.
2748 gnu_get_libc_version NEW: GNU ext.
2749 grantpt NEW: Unix98 PTY
2750 host2netname NEW: Secure RPC
2752 iconv_close NEW: iconv
2753 iconv_open NEW: iconv
2754 if_freenameindex NEW: IPv6
2755 if_indextoname NEW: IPv6
2756 if_nameindex NEW: IPv6
2757 if_nametoindex NEW: IPv6
2758 in6addr_any NEW: IPv6
2759 in6addr_loopback NEW: IPv6
2760 inet6_isipv4mapped NEW: IPv6
2761 isastream NEW: STREAMS
2762 iswblank NEW: GNU ext.
2763 key_decryptsession NEW: Secure RPC
2764 key_decryptsession_pk NEW: Secure RPC
2765 key_encryptsession NEW: Secure RPC
2766 key_encryptsession_pk NEW: Secure RPC
2767 key_gendes NEW: Secure RPC
2768 key_get_conv NEW: Secure RPC
2769 key_secretkey_is_set NEW: Secure RPC
2770 key_setnet NEW: Secure RPC
2771 key_setsecret NEW: Secure RPC
2772 llrint NEW: ISO C 9x
2773 llrintf NEW: ISO C 9x
2774 llrintl NEW: ISO C 9x
2775 llround NEW: ISO C 9x
2776 llroundf NEW: ISO C 9x
2777 llroundl NEW: ISO C 9x
2782 lrintf NEW: ISO C 9x
2783 lrintl NEW: ISO C 9x
2784 lround NEW: ISO C 9x
2785 lroundf NEW: ISO C 9x
2786 lroundl NEW: ISO C 9x
2788 makecontext NEW: Unix98
2789 mempcpy NEW: GNU ext.
2792 modify_ldt NEW: kernel
2796 nearbyint NEW: ISO C 9x
2797 nearbyintf NEW: ISO C 9x
2798 nearbyintl NEW: ISO C 9x
2799 netname2host NEW: Secure RPC
2800 netname2user NEW: Secure RPC
2801 nexttoward NEW: ISO C 9x
2802 nexttowardf NEW: ISO C 9x
2803 nexttowardl NEW: ISO C 9x
2807 passwd2des NEW: Secure RPC
2809 pow10f NEW: GNU ext.
2810 pow10l NEW: GNU ext.
2813 printf_size NEW: GNU ext.
2814 printf_size_info NEW: GNU ext.
2815 profil_counter REMOVED
2816 pthread_mutexattr_getkind_np REPLACED
2817 pthread_mutexattr_setkind_np REPLACED
2818 ptsname NEW: Unix98 PTY
2819 ptsname_r NEW: Unix98 PTY
2821 putchar_locked REMOVED
2822 putgrent NEW: GNU ext.
2824 putpmsg NEW: STREAMS
2825 pututxline NEW: Unix98
2829 readdir64_r NEW: LFS
2830 remquo NEW: ISO C 9x
2831 remquof NEW: ISO C 9x
2832 remquol NEW: ISO C 9x
2834 roundf NEW: ISO C 9x
2835 roundl NEW: ISO C 9x
2837 scalbln NEW: ISO C 9x
2838 scalblnf NEW: ISO C 9x
2839 scalblnl NEW: ISO C 9x
2841 sendfile NEW: kernel
2842 setcontext NEW: Unix98
2843 setrlimit64 NEW: LFS
2844 setutxent NEW: Unix98
2846 sigignore NEW: Unix98
2847 sigqueue NEW: POSIX.1b
2848 sigrelse NEW: Unix98
2849 sigset NEW: POSIX.1b
2850 sigtimedwait NEW: POSIX.1b
2851 sigwaitinfo NEW: POSIX.1b
2852 sincos NEW: GNU ext.
2853 sincosf NEW: GNU ext.
2854 sincosl NEW: GNU ext.
2858 strcasestr NEW: GNU ext.
2859 strtoimax NEW: ISO C 9x
2860 strtoumax NEW: ISO C 9x
2861 strverscmp NEW: GNU ext.
2862 svcauthdes_stats NEW: Secure RPC
2863 svcunix_create NEW: sunrpc etx
2864 svcunixfd_create NEW: sunrpc ext
2865 swapcontext NEW: Unix98
2866 tcgetsid NEW: Unix98 PTY
2867 tdestroy NEW: GNU ext.
2868 tgamma NEW: ISO C 9x
2869 tgammaf NEW: ISO C 9x
2870 tgammal NEW: ISO C 9x
2874 truncf NEW: ISO C 9x
2875 truncl NEW: ISO C 9x
2877 unlockpt NEW: Unix98 PTY
2878 updwtmpx NEW: Unix98
2879 user2netname NEW: Secure RPC
2880 utmpxname NEW: Unix98
2881 versionsort NEW: GNU ext.
2882 versionsort64 NEW: GNU ext.
2884 wcscasecmp NEW: GNU ext.
2885 wcsncasecmp NEW: GNU ext.
2886 wcsnlen NEW: GNU ext.
2887 wcstoimax NEW: ISO C 9x
2888 wcstoll NEW: ISO C 9x
2889 wcstoull NEW: ISO C 9x
2890 wcstoumax NEW: ISO C 9x
2892 wordexp NEW: POSIX.2
2893 wordfree NEW: POSIX.2
2894 write_profiling REMOVED
2895 xdecrypt NEW: Secure RPC
2896 xdr_authdes_cred NEW: Secure RPC
2897 xdr_authdes_verf NEW: Secure RPC
2898 xdr_cryptkeyarg NEW: Secure RPC
2899 xdr_cryptkeyarg2 NEW: Secure RPC
2900 xdr_cryptkeyres NEW: Secure RPC
2901 xdr_getcredres NEW: Secure RPC
2902 xdr_key_netstarg NEW: Secure RPC
2903 xdr_key_netstres NEW: Secure RPC
2904 xdr_keybuf NEW: Secure RPC
2905 xdr_keystatus NEW: Secure RPC
2906 xdr_netnamestr NEW: Secure RPC
2907 xdr_sizeof NEW: Secure RPC
2908 xdr_unixcred NEW: sunrpc ext
2909 xencrypt NEW: Secure RPC
2910 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2921 * inet_ntoa is thread-safe
2923 * updwtmp is moved from libutil to libc
2925 * rewrite of cbrt function
2927 * update of timezone data
2941 * add atoll function
2943 * fix complex problems in Berkeley DB code
2945 * fix math functions
2949 * fixed lots of header problems (especially Linux/GNU specific)
2951 * dynamic loader preserves all registers
2953 * Roland McGrath provided support for handling of auxiliary objects in
2954 the ELF dynamic loader.
2956 * support for parallel builds is improved
2960 * GNU extensions are no longer declared by default. To enable them you
2961 must define the macro `_GNU_SOURCE' in your program or compile with
2964 * The library has changed from using GNU ld symbol aliases to using weak
2965 symbols where available. The ELF object file format supports weak
2966 symbols; GNU ld also supports weak symbols in the a.out format. (There
2967 is also now support for other GNU ld extensions in ELF. Use the
2968 `--with-elf' option to configure to indicate you have ELF, and
2969 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2970 of many files which contained only symbol aliases, reducing the size of
2971 the source and the compiled library; many other files were renamed to
2972 less cryptic names previously occupied by the symbol alias files.
2973 There is a new header file <elf.h> for programs which operate on
2974 files in the ELF format.
2976 * Converted to Autoconf version 2, so `configure' has more options.
2977 Run `configure --help' to see the details.
2979 * The library can now be configured to build profiling, highly-optimized
2980 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2981 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2982 `configure' enable building these extra libraries. The shared library is
2983 built by default when using both ELF and GNU ld. When shared libraries
2984 are enabled, the new library `-ldl' is available for arbitrary run-time
2985 loading of shared objects; its interface is defined in <dlfcn.h>. The
2986 new header file <link.h> gives access to the internals of the run-time
2987 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2988 application of same name on other systems and it provides information
2989 about dynamically linked binaries.
2991 * The C library now provides the run-time support code for profiling
2992 executables compiled with `-pg'. Programs can control the profiling code
2993 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2994 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2995 the support for this file format was contributed by David Mosberger-Tang.
2997 * The math code has been replaced with a math library based on fdlibm from
2998 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2999 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3000 functions. The math functions now reside in a separate library, so
3001 programs using them will need to use `-lm' their linking commands.
3003 * John C. Bowman contributed optimized ix87 assembler inline functions.
3005 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3006 mechanism similar to that found in Solaris 2. This is now used for the
3007 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3008 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3009 file controls what services are used for each individual database. This
3010 works by loading shared libraries with names specified in `nsswitch.conf',
3011 so service modules can be changed or added at any time without even
3012 relinking any program. Currently there are the file, db, and NIS based
3013 NSS services available.
3015 * The new functions `strtoq' and `strtouq' parse integer values from
3016 strings, like `strtol' and `strtoul', but they return `long long int' and
3017 `unsigned long long int' values, respectively (64-bit quantities).
3019 * The new functions `strtof' and `strtold' parse floating-point values from
3020 strings, like `strtod', but they return `float' and `long double' values,
3021 respectively (on some machines `double' and `long double' are the same).
3023 * Ulrich Drepper has contributed new implementations of the floating-point
3024 printing and reading code used in the `printf' family of functions and
3025 `strtod', `strtof', and `strtold'. These new functions are perfectly
3026 accurate, and much faster than the old ones.
3028 * The implementation of the POSIX locale model was completely rewritten by
3029 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3030 to compile the POSIX locale definition.
3032 * The former dummy implementations of the strcoll and strxfrm function are
3033 now replaced by fully functional code contributed by Ulrich Drepper. The
3034 collation information comes from the POSIX locale definitions.
3036 * The new header <langinfo.h> defines an interface for accessing
3037 various locale-dependent data (using the locale chosen with `setlocale').
3039 * Ulrich Drepper has contributed a new suite of functions for operation on
3040 wide-character and multibyte-character strings, in <wchar.h>;
3041 and classification and case conversion of wide characters, in <wctype.h>.
3042 These new functions are conforming to the ISO C, Amendement 1 specification.
3044 * There is now a second implementation of the standard I/O library available.
3045 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3046 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3048 * You can now use positional parameter specifications in format strings
3049 for the `printf' and `scanf' families of functions. For example,
3050 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3051 ``Number 6, Mr Jones''. This is mainly useful when providing different
3052 format strings for different languages, whose grammars may dictate
3053 different orderings of the values being printed. To support this
3054 feature, the interface for `register_printf_handler' has changed; see
3055 the header file <printf.h> for details.
3057 * The `printf' and `scanf' families of functions now understand a new
3058 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3059 to group numbers as indicated by the locale; for `scanf' and friends, this
3060 says to accept as valid only a number with all the proper grouping
3061 separators in the right places. In the default "C" locale, numbers are
3062 not grouped; but locales for specific countries will define the usual
3063 conventions (i.e. separate thousands with `,' in the US locale).
3065 * The pgrp functions have been regularized, slightly incompatibly but much
3066 less confusingly. The core functions are now `getpgid' and `setpgid',
3067 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3068 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3069 provided for compatibility. There is no longer an incompatible `getpgrp'
3070 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3072 * The new header file <fts.h> and suite of functions simplify programs that
3073 operate on directory trees. This code comes from 4.4 BSD.
3075 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3076 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3077 NSS scheme used in glibc.
3079 * There is a new malloc debugging hook `__memalign_hook'.
3081 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3082 `unsigned int' in <sys/types.h>. These are for compatibility only and
3083 their use is discouraged.
3085 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3086 done differently, so that it works even without GNU ld.
3088 * New function `euidaccess' checks allowed access to a file like `access',
3089 but using the effective IDs instead of the real IDs.
3091 * The time zone data files have been updated for the latest and greatest
3092 local time conventions of the countries of the world.
3094 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3097 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3098 for formatting floating-point numbers. They are provided only for
3099 compatibility; new programs should use `sprintf' instead. There are
3100 also equivalent function for the `long double' floating-point type and
3101 all functions also exist in a reentrant form.
3103 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3104 functions for maintaining the login-record files (primarily of use to
3105 system programs such as `login'), and convenient functions for
3106 allocating and initializing a pseudo-terminal (pty) device.
3108 * Ulrich Drepper has contributed new support for System V style
3109 shared memory and IPC on systems that support it.
3111 * Ulrich Drepper has contributed several miscellaneous new functions found
3112 in System V: The `hsearch' family of functions provide an effective
3113 implementation of hash tables; `a64l' and `l64a' provide a very simple
3114 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3117 * Ulrich Drepper has contributed new reentrant counterparts for the
3118 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3120 * Ulrich Drepper has contributed new, highly-optimized versions of several
3121 string functions for the i486/Pentium family of processors.
3123 * Ulrich Drepper has updated the Linux-specific code, based largely
3124 on work done in Hongjiu Lu's version of GNU libc for Linux.
3125 The GNU library now supports Linux versions 2.0.10 and later,
3126 using the ELF object file format (i[3456]86-*-linux).
3128 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3130 * David Mosberger-Tang and Richard Henderson have ported the C library
3131 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3132 dynamic linking support for ELF/Alpha.
3134 * Richard Henderson contributed several Alpha optimized assembler function
3135 for arithmetic and string handling.
3137 * Ulrich Drepper has contributed a new set of message catalog functions to
3138 support multiple languages using the <libintl.h> interface, for use with
3139 his new package GNU gettext. Translation volunteers have contributed
3140 catalogs of the library's messages in Spanish, German, and Korean.
3142 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3143 program and the `catgets' function for reading the catalog files it
3144 creates. (The <libintl.h> interface is preferred; we include the
3145 <nl_types.h> interface using `catgets' only for source compatibility with
3146 programs already written to use it.)
3148 * New header file <values.h> gives SVID-compatible names for <limits.h>
3151 * Various new macros, declarations, and small header files for compatibility
3154 * New function `group_member' is a convenient way to check if a process has
3155 a given effective group ID.
3157 * When using GCC 2.7 and later, the socket functions are now declared in a
3158 special way so that passing an argument of type `struct sockaddr_in *',
3159 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3160 `struct sockaddr *' type, does not generate a type-clash warning.
3162 * New function `error' declared in header file <error.h> is a convenient
3163 function for printing error messages and optionally exiting; this is the
3164 canonical function used in GNU programs. The new functions `err', `warn',
3165 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3166 doing the same thing.
3168 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3169 POSIX.2 `glob' function to do ~ and {...} expansion.
3171 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3172 `clearenv' which is used in POSIX.9 is also available.
3174 * New function `getsid' returns session ID number on systems that support it.
3176 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3177 files <db.h> and <mpool.h> provide a rich set of functions for several
3178 types of simple databases stored in memory and in files, and <ndbm.h> is
3179 an old `ndbm'-compatible interface using the `db' functions. Link with
3180 `-ldb' to get these functions.
3182 * New macro `strdupa' copies a string like `strdup', but uses local stack
3183 space from `alloca' instead of dynamic heap space from `malloc'.
3185 * New function `strnlen' is like `strlen' but searches only a given maximum
3186 number of characters for the null terminator. `stpncpy', `strndup' and
3187 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3190 * New function `statfs' in header <sys/statfs.h>.
3192 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3193 provide convenient functions for operating on blocks of null-terminated
3196 * A new suite of functions in <utmp.h> handle all the details of reading
3197 and writing the utmp file.
3199 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3202 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3203 completely POSIX compliant and also implemented the extended functionality
3204 to handle alternate digit representation and alternate era date formats.
3206 * Ulrich Drepper provided an implementation of the `strptime' function
3207 defined in XPG4.2 which transforms a string into a `struct tm' value.
3209 * Paul Eggert provided the tzselect shell script as part of the timezone
3210 code. The shell script makes it easy to select the correct timezone
3213 * The implementation of the malloc family of functions is completely replaced
3214 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3215 The implementation uses the mmap function (if available) and it is
3216 optimized for the use in multi threaded programs.
3218 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3219 functions. This new functionality is usable by specifying a special
3220 salt string and it is compatible with implementation on *BSD systems.
3222 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3223 `getsubopt' to handle second level command line options, `bsd_signal'
3224 to access BSD style `signal' functionality, the obsolete `regexp' style
3227 * the `lchown' function is available on system which support this
3230 * The implementation of the shadow password handling function was contributed
3233 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3235 * POSIX.1g support was added. The <sys/select.h> header is available,
3236 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3237 implementation of `getaddrinfo'.
3241 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3243 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3244 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3246 * The new function `daemon' from 4.4 BSD is useful for server programs that
3247 want to put themselves in the background.
3249 * Joel Sherrill has contributed support for several standalone boards that
3250 run without an operating system.
3252 * `printf', `scanf' and friends now accept a `q' type modifier for long
3253 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3255 * All of the code taken from BSD (notably most of the math and networking
3256 routines) has been updated from the BSD 4.4-Lite release.
3258 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3260 * The new functions `getdomainname' and `setdomainname' fetch or change the
3261 YP/NIS domain name. These are system calls which exist on systems which
3264 * The time zone data files have been updated for the latest international
3267 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3268 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3272 * The C library now includes support for Sun RPC, from Sun's free
3273 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3274 are included. (There is still no support for YP.)
3276 * Tom Quinn has contributed a port of the C library to SGI machines running
3277 Irix 4 (mips-sgi-irix4).
3279 * The new `lockf' function is a simplified interface to the locking
3280 facilities of `fcntl', included for compatibility.
3282 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3284 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3286 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3289 * The error message printed by `assert' for a failed assertion now includes
3290 the name of the program (if using GNU ld) and the name of the calling
3291 function (with versions of GCC that support this).
3293 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3295 * The library now includes the <sys/mman.h> header file and memory
3296 management functions `mmap', `munmap', `mprotect', `msync', and
3297 `madvise', on systems that support those facilities.
3299 * The interface for `mcheck' has changed slightly: the function called to
3300 abort the program when an allocation inconsistency is detected now takes
3301 an argument that indicates the type of failure. The new function
3302 `mprobe' lets you request a consistency check for a particular block at
3303 any time (checks are normally done only when you call `free' or `realloc'
3306 * It is now possible to easily cross-compile the C library, building on one
3307 system a library to run on another machine and/or operating system. All
3308 you need to do is set the variable `HOST_CC' in `configparms' to the
3309 native compiler for programs to run on the machine you are building on (a
3310 few generator programs are used on Unix systems); set `CC' to the
3313 * The new function `fexecve' (only implemented on the GNU system) executes
3314 a program file given a file descriptor already open on the file.
3318 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3319 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3321 * You can set the variable `libprefix' in `configparms' to specify a prefix
3322 to be prepended to installed library files; this makes it easy to install
3323 the GNU C library to be linked as `-lgnuc' or whatever.
3325 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3326 copies a limited number of characters from a string, and returns the
3327 address of the last character written.
3329 * You no longer need to check for whether the installed `stddef.h' is
3330 compatible with the GNU C library. configure now checks for you.
3332 * You can now define a per-stream `fileno' function to convert the
3333 stream's cookie into an integral file descriptor.
3335 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3336 allocates zero bytes of storage, and returns a unique pointer which
3337 you can pass to `realloc' or `free'. The behavior is undefined if
3338 you dereference this pointer.
3340 * The C library now runs on Sony NEWS m68k machines running either
3341 NewsOS 3 or NewsOS 4.
3343 * The new `syscall' function is a system-dependent primitive function
3344 for invoking system calls. It has the canonical behavior on Unix
3345 systems, including unreliable return values for some calls (such as
3346 `pipe', `fork' and `getppid').
3348 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3349 to `EAGAIN', which is the preferred name. On systems whose kernels
3350 use two distinct codes, the C library now translates EWOULDBLOCK to
3351 EAGAIN in every system call function.
3355 * The GNU C Library Reference Manual is now distributed with the library.
3356 `make dvi' will produce a DVI file of the printed manual.
3357 `make info' will produce Info files that you can read on line using C-h i
3358 in Emacs or the `info' program.
3359 Please send comments on the manual to bug-glibc-manual@gnu.org.
3361 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3363 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3365 * Jason Merrill has contributed a port to the Sequent Symmetry running
3366 Dynix version 3 (i386-sequent-dynix).
3368 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3369 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3371 * New function `memory_warnings' lets you arrange to get warnings when
3372 malloc is running out of memory to allocate, like Emacs gives you.
3374 * The C library now contains the relocating allocator used in Emacs 19 for
3375 its editing buffers. This allocator (ralloc) minimizes allocation
3376 overhead and fragmentation by moving allocated regions around whenever it
3377 needs to. You always refer to a ralloc'd region with a "handle" (a
3378 pointer to a pointer--an object of type `void **').
3380 * There is a new `printf' format: `%m' gives you the string corresponding
3381 to the error code in `errno'.
3383 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3384 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3385 pass, the `a' modifier says to fill in a `char **' you pass with a
3388 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3389 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3390 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3392 * `mkstemp' is a traditional Unix function to atomically create and open a
3393 uniquely-named temporary file.
3397 * The standard location for the file that says what the local timezone is
3398 has changed again. It is now `/usr/local/etc/localtime' (or more
3399 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3401 * The distribution no longer contains any files with names longer than 14
3404 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3405 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3407 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3411 * The configuration process has changed quite a bit. The `configure'
3412 script is now used just like the configuration scripts for other GNU
3413 packages. The `sysdeps' directory hierarchy is much rearranged.
3414 The file `INSTALL' explains the new scheme in detail.
3416 * The header files no longer need to be processed into ANSI C and
3417 traditional C versions. There is just one set of files to install, and
3418 it will work with ANSI or old C compilers (including `gcc -traditional').
3420 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3421 MIPS DECStation running Ultrix 4.
3423 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3424 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3425 made itself into a shared library.
3427 * Yet further improved support for the i386, running 4.3 BSD-like systems
3428 (such as Mach 3 with the Unix single-server), or System V.
3430 * New function `strncasecmp' to do case-insensitive string comparison
3431 with limited length.
3433 * New function `strsep' is a reentrant alternative to `strtok'.
3435 * New functions `scandir' and `alphasort' for searching directories.
3437 * New function `setenv' is a better interface to `putenv'.
3439 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3440 function for traversing a directory tree.
3442 * The GNU obstack package is now also part of the C library.
3443 The new function `open_obstack_stream' creates a stdio stream that
3444 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3445 formatted output directly to an obstack.
3447 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3448 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3450 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3452 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3453 things to your strings.
3455 * There are some new test programs: test-fseek, testmb, and testrand.
3457 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3458 These ports are not finished, but are a good starting place for really
3459 supporting those systems.
3461 * `/etc/localtime' is now the standard location for the file that says what
3462 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3463 This follows the general principle that `/etc' is the place for all local
3464 configuration files.
3466 * The C library header files now use `extern "C"' when used by the C++
3467 compiler, so the C library should now work with C++ code.
3469 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3470 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3473 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3474 function which uses the `merge sort' algorithm, and is said to be
3475 significantly faster than the old GNU `qsort' function. Merge sort is
3476 now the standard `qsort' function. The new algorithm can require a lot
3477 of temporary storage; so, the old sorting function is called when the
3478 required storage is not available.
3480 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3481 provides the Unix `crypt' function, plus some other entry points.
3483 * The code and header files taken from 4.4 BSD have been updated with the
3484 latest files released from Berkeley.
3486 ----------------------------------------------------------------------
3487 Copyright information:
3489 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3491 Permission is granted to anyone to make or distribute verbatim copies
3492 of this document as received, in any medium, provided that the
3493 copyright notice and this permission notice are preserved,
3494 thus giving the recipient permission to redistribute in turn.
3496 Permission is granted to distribute modified versions
3497 of this document, or of portions of it,
3498 under the above conditions, provided also that they
3499 carry prominent notices stating who last changed them.
3502 version-control: never