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.
43 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
44 for the Linux quota interface which predates kernel version 2.4.22 has
47 * DNSSEC-related declarations and definitions have been removed from the
48 <arpa/nameser.h> header file, and libresolv will no longer attempt to
49 decode the data part of DNSSEC record types. Previous versions of glibc
50 only implemented minimal support for the previous version of DNSSEC, which
51 is incompatible with the currently deployed version.
53 Security related changes:
55 On ARM EABI (32-bit), generating a backtrace for execution contexts which
56 have been created with makecontext could fail to terminate due to a
57 missing .cantunwind annotation. This has been observed to lead to a hang
58 (denial of service) in some Go applications compiled with gccgo. Reported
59 by Andreas Schwab. (CVE-2016-6323)
61 The following bugs are resolved with this release:
63 [The release manager will add the list generated by
64 scripts/list-fixed-bugs.py just before the release.]
68 * The minimum Linux kernel version that this version of the GNU C Library
69 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
70 kernel version 2.6.32 or later suffices (on architectures that already
71 required kernel versions more recent than 3.2, those requirements remain
72 unchanged). Linux 3.2 or later kernel headers are required on all
75 * The pap_AN locale has been deleted. This has been deprecated for a long
76 time. It has been replaced by pap_AW & pap_CW, both of which have long
77 been included in previous releases.
79 * The readdir_r and readdir64_r functions have been deprecated. It is
80 recommended to use readdir and readdir64 instead.
82 * The type “union wait” has been removed. It was deprecated in the early
83 1990s and never part of POSIX. Application code should use the int type
84 instead of “union wait”.
86 * A new NSS action is added to facilitate large distributed system
87 administration. The action, MERGE, allows remote user stores like LDAP
88 to be merged into local user stores like /etc/groups in order to provide
89 easy to use, updated, and managed sets of merged credentials. The new
90 action can be used by configuring it in /etc/nsswitch.conf:
91 group: files [SUCCESS=merge] nis
92 Implemented by Stephen Gallagher (Red Hat).
94 * The deprecated __malloc_initialize_hook variable has been removed from the
97 * The long unused localedef --old-style option has been removed. It hasn't
98 done anything in over 16 years. Scripts using this option can safely
101 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
102 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
103 return the next representable value in the direction of positive infinity
104 and the nextdown functions return the next representable value in the
105 direction of negative infinity. These are currently enabled as GNU
108 Security related changes:
110 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
111 could result in a stack overflow when getnetbyname was called with an
112 overly long name. (CVE-2016-3075)
114 * Previously, getaddrinfo copied large amounts of address data to the stack,
115 even after the fix for CVE-2013-4458 has been applied, potentially
116 resulting in a stack overflow. getaddrinfo now uses a heap allocation
117 instead. Reported by Michael Petlan. (CVE-2016-3706)
119 * The glob function suffered from a stack-based buffer overflow when it was
120 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
121 Reported by Alexander Cherepanov. (CVE-2016-1234)
123 * The Sun RPC UDP client could exhaust all available stack space when
124 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
125 alloca plugin for GCC. (CVE-2016-4429)
127 * The IPv6 name server management code in libresolv could result in a memory
128 leak for each thread which is created, performs a failing naming lookup,
129 and exits. Over time, this could result in a denial of service due to
130 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
132 The following bugs are resolved with this release:
134 [1170] localedata: ne_NP: update Nepali locale definition file
135 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
137 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
138 [6796] math: fdim() does not set errno on overflow
139 [10354] libc: posix_spawn should use vfork() in more cases than presently
140 [11213] localedata: localedata: add copyright disclaimer to locale files
141 [12143] localedata: chr_US: new Cherokee locale
142 [12450] localedata: sgs_LT: new locale
143 [12676] localedata: ln_CD: new locale
144 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
146 [13304] math: fma, fmaf, fmal produce wrong results
147 [14259] build: --localedir arg to configure is ignored
148 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
149 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
150 [14934] localedata: es_CL: wrong first weekday chilean locale
151 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
153 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
155 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
156 [15368] nptl: raise() is not async-signal-safe
157 [15479] math: ceil, floor, round and trunc raise inexact exception
158 [15578] localedata: kk_KZ: various updates
159 [16003] localedata: pap_AN: punt old locale
160 [16137] localedata: iw_IL: punt old locale
161 [16190] localedata: eo: new esperanto locale
162 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
163 [16742] malloc: race condition: pthread_atfork() called before first
164 malloc() results in unexpected locking behaviour/deadlocks
165 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
167 [16983] localedata: postal_fmt does not allow %l and %n modifiers
168 [17565] localedata: pt_PT: wrong (work-)week start
169 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
170 [17950] build: Build fails with -msse
171 [18205] localedata: be_BY*: wrong first_weekday and first_workday
172 [18433] libc: posix_spawn does not return correctly upon failure to
174 [18453] localedata: charmaps/IBM875: incorrect codes
175 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
177 [18896] localedata: he_IL: improvements for currency
178 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
180 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
182 [19056] libc: Deprecate readdir_r
183 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
185 [19198] localedata: nl_NL: small improvements for Dutch locales
186 [19257] network: Per-thread memory leak in __res_vinit with IPv6
187 nameservers (CVE-2016-5417)
188 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
190 [19400] locale: Language missing in "iso-639.def", trivial fix in
192 [19431] malloc: Deadlock between fflush, getdelim, and fork
193 [19505] libc: Incorrect file descriptor validity checks in
194 posix_spawn_file_actions_add{open,close,dup2}
195 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
197 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
198 `intl/{gettextP,loadinfo}.h'
199 [19534] libc: execle, execlp may use malloc
200 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
201 [19573] network: res_nclose and __res_maybe_init disagree about name
202 server initialization, breaking Hesiod
203 [19575] localedata: Status of GB18030 tables
204 [19581] localedata: sr_* date_fmt string contains additional newline
205 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
207 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
208 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
209 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
210 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
212 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
214 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
216 [19610] dynamic-link: ldconfig -X removes stale symbolic links
217 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
218 [19633] locale: strfmon_l applies global locale to number formatting
219 [19642] network: Memory leak in getnameinfo
220 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
221 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
223 [19654] math: [x86_64] Need testcase for BZ #19590 fix
224 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
226 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
227 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
229 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
231 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
233 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
234 pointers and lengths in error-case.
235 [19727] locale: Converting from/to UTF-xx with iconv() does not always
236 report errors on UTF-16 surrogates values.
237 [19755] nscd: nscd assertion failure in gc
238 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
239 [19759] libc: mempcpy shouldn't be inlined
240 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
241 [19765] libc: s390 needs an optimized mempcpy
242 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
243 NAME_MAX limit assumption (CVE-2016-1234)
244 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
245 [19787] network: Missing and incorrect truncation checks in getnameinfo
246 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
248 [19791] network: Assertion failure in res_query.c with un-connectable name
250 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
251 [19822] math: libm.so install clobbers old version
252 [19825] network: resolv: send_vc can return uninitialized data in second
253 response to getaddrinfo
254 [19830] network: nss_dns: should check RDATA length against buffer length
255 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
256 confronted with A/AAAA records of invalid size
257 [19837] nss: nss_db: No retries for some long lines with a larger buffer
258 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
259 [19853] stdio: Printing IBM long double in decimal with high precision is
261 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
262 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
263 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
265 [19865] network: Assertion failure or memory leak in
266 _nss_dns_getcanonname_r
267 [19868] network: nss_dns: netent code does not skip over non-PTR records
268 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
270 [19881] string: Improve x86-64 memset
271 [19907] string: Incorrect memcpy tests
272 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
274 [19925] libc: termios.h XCASE namespace
275 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
276 [19929] libc: limits.h NL_NMAX namespace
277 [19931] stdio: Memory leak in vfprintf
278 [19957] libc: clone(CLONE_VM) access invalid parent memory
279 [19963] localedata: en_IL: New locale
280 [19989] stdio: stdio.h cuserid namespace
281 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
283 [19996] locale: langinfo.h nl_langinfo_l namespace
284 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
285 [20010] network: getaddrinfo: Stack overflow in hostent translation
287 [20012] stdio: libio: fmemopen append mode failure
288 [20014] stdio: stdio.h namespace for pre-threads POSIX
289 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
290 [20023] libc: fcntl.h timespec namespace
291 [20024] math: [x86_64] vectorized sincos trashes the stack
292 [20031] network: nss_hesiod: Heap overflow in get_txt_records
293 [20041] time: sys/time.h timespec namespace
294 [20043] libc: unistd.h missing cuserid for UNIX98 and before
295 [20044] libc: unistd.h missing pthread_atfork for UNIX98
296 [20051] libc: ttyslot in wrong header under wrong conditions
297 [20054] libc: gethostname not declared for XPG4
298 [20055] libc: termios.h missing tcgetsid for XPG4
299 [20072] dynamic-link: x86 init_cpu_features is called twice in static
301 [20073] libc: sys/stat.h fchmod namespace
302 [20074] libc: stdlib.h rand_r namespace
303 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
304 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
306 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
307 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
309 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
310 [20119] libc: Wrong mask for processors level type from CPUID
311 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
312 AS not supporting AVX512
313 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
315 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
316 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
318 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
319 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
320 [20178] libc: posix_spawn{p} should not call exit
321 [20191] stdio: libio: vtables hardening
322 [20195] string: FMA4 detection requires CPUID execution with register
324 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
325 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
327 [20212] math: acos (sNaN) returns sNaN
328 [20213] math: asin (sNaN) returns sNaN
329 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
330 [20218] math: [i386] asinhl (sNaN) returns sNaN
331 [20219] math: [i386] atanhl (sNaN) returns sNaN
332 [20222] stdio: fopencookie: Mangle function pointers
333 [20224] math: [i386] cbrtl (sNaN) returns sNaN
334 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
335 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
337 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
338 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
339 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
340 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
341 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
342 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
343 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
344 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
345 [20240] math: modf (sNaN) returns sNaN
346 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
347 [20250] math: frexp (sNaN) returns sNaN
348 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
349 [20255] math: [i386] fdim, fdimf return with excess range and precision /
351 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
352 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
353 subscript is below array bounds [-Werror=array-bounds]
354 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
355 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
357 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
358 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
360 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
362 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
363 [20316] localedata: id_ID: Februari instead of Pebruari
364 [20327] string: POWER8 strcasecmp returns incorrect result
365 [20347] math: Failure: Test: j0_downward (0xap+0)
366 [20348] libc: FAIL: misc/tst-preadvwritev64
367 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
368 [20350] libc: There is no test for p{read,write}64
369 [20357] math: Incorrect cos result for 1.5174239687223976
370 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
374 * Unicode 8.0.0 Support: Character encoding, character type info, and
375 transliteration tables are all updated to Unicode 8.0.0, using new
376 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
377 These updates cause user visible changes, such as the fixes for bugs
378 89, 16061, and 18568.
380 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
381 kernel-internal CPU set size. This means that requests that change the
382 CPU affinity which failed before (for example, an all-ones CPU mask) will
383 now succeed. Applications that need to determine the effective CPU
384 affinities need to call sched_getaffinity or pthread_getaffinity_np after
385 setting it because the kernel can adjust it (and the previous size check
386 would not detect this in the majority of cases).
388 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
389 the following new symbols are used: fts64_children, fts64_close,
390 fts64_open, fts64_read and fts64_set.
392 * getaddrinfo now detects certain invalid responses on an internal netlink
393 socket. If such responses are received, an affected process will
394 terminate with an error message of "Unexpected error <number> on netlink
395 descriptor <number>" or "Unexpected netlink response of size <number> on
396 descriptor <number>". The most likely cause for these errors is a
397 multi-threaded application which erroneously closes and reuses the netlink
398 file descriptor while it is used by getaddrinfo.
400 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
401 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
402 unnecessary serialization of memory allocation requests across threads.
403 The defect is now corrected. Users should see a substantial increase in
404 the concurent throughput of allocation requests for applications which
405 trigger this bug. Affected applications typically create and
406 destroy threads frequently. (Bug 19048 was reported and analyzed by
409 * There is now a --disable-timezone-tools configure option for disabling the
410 building and installing of the timezone related utilities (zic, zdump, and
411 tzselect). This is useful for people who build the timezone data and code
412 independent of the GNU C Library.
414 * The obsolete header <regexp.h> has been removed. Programs that require
415 this header must be updated to use <regex.h> instead.
417 * The obsolete functions bdflush, create_module, get_kernel_syms,
418 query_module and uselib are no longer available to newly linked binaries;
419 the header <sys/kdaemon.h> has been removed. These functions and header
420 were specific to systems using the Linux kernel and could not usefully be
421 used with the GNU C Library on systems with version 2.6 or later of the
424 * Optimized string, wcsmbs and memory functions for IBM z13.
425 Implemented by Stefan Liebler.
427 * Newly linked programs that define a variable called signgam will no longer
428 have it set by the lgamma, lgammaf and lgammal functions. Programs that
429 require signgam to be set by those functions must ensure that they use the
430 variable provided by the GNU C Library and declared in <math.h>, without
431 defining their own copy.
433 * The minimum GCC version that can be used to build this version of the GNU
434 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
435 still be used to compile programs using the GNU C Library.
437 Security related changes:
439 * An out-of-bounds value in a broken-out struct tm argument to strftime no
440 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
442 * The LD_POINTER_GUARD environment variable can no longer be used to disable
443 the pointer guard feature. It is always enabled. Previously,
444 LD_POINTER_GUARD could be used to disable security hardening in binaries
445 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
448 * An integer overflow in hcreate and hcreate_r could lead to an
449 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
451 * The catopen function no longer has unbounded stack usage. Reported by
454 * The nan, nanf and nanl functions no longer have unbounded stack usage
455 depending on the length of the string passed as an argument to the
456 functions. Reported by Joseph Myers. (CVE-2014-9761)
458 * A stack-based buffer overflow was found in libresolv when invoked from
459 libnss_dns, allowing specially crafted DNS responses to seize control
460 of execution flow in the DNS client. The buffer overflow occurs in
461 the functions send_dg (send datagram) and send_vc (send TCP) for the
462 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
463 family. The use of AF_UNSPEC triggers the low-level resolver code to
464 send out two parallel queries for A and AAAA. A mismanagement of the
465 buffers used for those queries could result in the response of a query
466 writing beyond the alloca allocated buffer created by
467 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
468 the overflow. Thanks to the Google Security Team and Red Hat for
469 reporting the security impact of this issue, and Robert Holiday of
470 Ciena for reporting the related bug 18665. (CVE-2015-7547)
472 The following bugs are resolved with this release:
474 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
475 [887] math: Math library function "logb" and "nextafter" inconsistent
476 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
477 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
478 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
479 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
481 [4404] localedata: German translation of "Alarm clock" is misleading
482 [6799] math: nextafter() and nexttoward() doen't set errno on
483 overflow/underflow errors
484 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
486 [10432] nis: _nss_nis_setnetgrent assertion failure
487 [11460] libc: fts has no LFS support
488 [12926] network: getaddrinfo()/make_request() may spin forever
489 [13065] nptl: Race condition in pthread barriers
490 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
491 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
493 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
494 [14912] libc: Rename non-installed bits/*.h headers
495 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
496 [15367] math: Let gcc use __builtin_isinf
497 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
498 [15421] math: lgamma wrongly sets signgam for ISO C
499 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
500 FE_INVALID with argument out of range
501 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
503 [15786] dynamic-link: ifunc resolver functions can smash function
505 [15918] math: Unnecessary check for equality in hypotf()
506 [16061] localedata: Review / update transliteration data
507 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
509 [16141] time: strptime %z offset restriction
510 [16171] math: drem should be alias of remainder
511 [16296] math: fegetround is pure?
512 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
513 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
515 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
516 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
518 [16422] math: [powerpc] math-float, math-double failing llrint tests with
519 "Exception "Inexact" set" on ppc32
520 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
521 [16517] math: Missing underflow exception from tanf/tan/tanl
522 [16519] math: Missing underflow exception from sinhf
523 [16520] math: Missing underflow exception from tanhf
524 [16521] math: Missing underflow exception from exp2
525 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
527 [16734] stdio: fopen calls mmap to allocate its buffer
528 [16961] math: nan function incorrect handling of bad sequences
529 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
530 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
531 [16985] locale: localedef: confusing error message when opening output
533 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
534 [17197] locale: Redundant shift character in iconv conversion output at
536 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
537 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
538 [17250] dynamic-link: static linking breaks nss loading
539 (getaddrinfo/getpwnam/etc...)
540 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
542 [17441] math: isnan() should use __builtin_isnan() in GCC
543 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
544 (related to lock elision)
545 [17787] manual: Exponent on page 324 of the PDF ends prematurely
546 [17886] time: strptime should be able to parse "Z" as a timezone with %z
547 [17887] time: strptime should be able to parse "+01:00" style timezones
548 [17905] libc: catopen() Multiple unbounded stack allocations
550 [18084] libc: backtrace (..., 0) dumps core on x86
551 [18086] libc: nice() sets errno to 0 on success
552 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
553 is too large (CVE-2015-8778)
554 [18251] dynamic-link: SONAME missing when audit modules provides path
555 [18265] libc: add attributes for wchar string and memory functions
556 [18370] math: csqrt missing underflows
557 [18421] libc: [hppa] read-only segment has dynamic relocations
558 [18472] libc: Obsolete syscall wrappers should be compat symbols
559 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
560 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
561 [18525] localedata: Remove locale timezone information
562 [18560] libc: [powerpc] spurious bits/ipc.h definitions
563 [18568] localedata: Update locale data to Unicode 8.0
564 [18589] locale: sort-test.sh fails at random
565 [18595] math: ctan, ctanh missing underflows
566 [18604] libc: assert macro-expands its argument
567 [18610] math: S390: fetestexcept() reports any exception if DXC-code
568 contains a vector instruction exception.
569 [18611] math: j1, jn missing errno setting on underflow
570 [18618] localedata: sync Chechen locale definitions with other *_RU
572 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
573 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
574 [18665] network: In send_dg, the recvfrom function is NOT always using the
575 buffer size of a newly created buffer (CVE-2015-7547)
576 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
578 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
580 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
581 [18699] math: tilegx cproj() for various complex infinities does not yield
583 [18724] libc: Harden put*ent functions against data injection
584 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
585 [18755] build: build errors with -DNDEBUG
586 [18757] stdio: fmemopen fails to set errno on failure
587 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
589 [18781] libc: openat64 lacks O_LARGEFILE
590 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
591 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
592 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
593 [18790] math: [ldbl-128ibm] tanhl inaccurate
594 [18795] libc: stpncpy fortification misses buffer lengths that are
596 [18796] build: build fails for --disable-mathvec
597 [18803] math: hypot missing underflows
598 [18820] stdio: fmemopen may leak memory on failure
599 [18823] math: csqrt spurious underflows
600 [18824] math: fma spurious underflows
601 [18825] math: pow missing underflows
602 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
603 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
604 [18870] build: sem_open.c fails to compile with missing symbol
606 [18872] stdio: Fix memory leak in printf_positional
607 [18873] libc: posix_fallocate overflow check ineffective
608 [18875] math: Excess precision leads incorrect libm
609 [18877] libc: arm: mmap offset regression
610 [18887] libc: memory corruption when using getmntent on blank lines
611 [18918] localedata: hu_HU: change time to HH:MM:SS format
612 [18921] libc: Regression: extraneous stat() and fstat() performed by
614 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
615 binaries (CVE-2015-8777)
616 [18951] math: tgamma missing underflows
617 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
619 [18953] localedata: lt_LT: change currency symbol to the euro
620 [18956] math: powf inaccuracy
621 [18961] math: [i386] exp missing underflows
622 [18966] math: [i386] exp10 missing underflows
623 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
624 [18969] build: multiple string test failures due to missing locale
626 [18970] libc: Reference of pthread_setcancelstate in libc.a
627 [18977] math: float / long double Bessel functions not in XSI POSIX
628 [18980] math: i386 libm functions return with excess range and precision
629 [18981] math: i386 scalb*, ldexp return with excess range and precision
630 [18982] stdio: va_list and vprintf
631 [18985] time: Passing out of range data to strftime() causes a segfault
633 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
634 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
635 [19012] locale: iconv_open leaks memory on error path
636 [19016] math: clog, clog10 inaccuracy
637 [19018] nptl: Mangle function pointers in tls_dtor_list
638 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
639 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
640 [19048] malloc: malloc: arena free list can become cyclic, increasing
642 [19049] math: [powerpc] erfc incorrect zero sign
643 [19050] math: [powerpc] log* incorrect zero sign
644 [19058] math: [x86_64] Link fail with -fopenmp and -flto
645 [19059] math: nexttoward overflow incorrect in non-default rounding modes
646 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
647 [19074] network: Data race in _res_hconf_reorder_addrs
648 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
649 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
650 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
652 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
654 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
655 [19086] manual: posix_fallocate64 documented argument order is wrong.
656 [19088] math: lround, llround missing exceptions close to overflow
658 [19094] math: lrint, llrint missing exceptions close to overflow threshold
659 [19095] math: dbl-64 lrint incorrect for 64-bit long
660 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
661 [19124] dynamic-link: ld.so failed to build with older assmebler
662 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
663 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
664 [19134] math: [powerpc32] lround, lroundf spurious exceptions
665 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
666 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
667 pthread_setaffinity_np
668 [19156] math: [ldbl-128] j0l spurious underflows
669 [19164] nptl: tst-getcpu fails with many possible CPUs
670 [19168] math: math/test-ildoubl and math/test-ldouble failure
671 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
672 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
674 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
675 (FE_NOMASK_ENV) do not clear SSE exceptions
676 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
677 _int_new_arena/reused_arena
678 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
679 [19201] math: dbl-64 remainder incorrect sign of zero result
680 [19205] math: bits/math-finite.h conditions do not match math.h and
682 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
683 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
684 for C99-based standards
685 [19212] libc: features.h not -Wundef clean
686 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
688 [19214] libc: Family and model identification for AMD CPU's are incorrect.
689 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
690 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
692 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
694 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
696 [19242] libc: strtol incorrect in Turkish locales
697 [19243] malloc: reused_arena can pick an arena on the free list, leading
698 to an assertion failure and reference count corruption
699 [19253] time: tzset() ineffective when temporary TZ did not include DST
701 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
702 [19270] math: [hppa] Shared libm missing __isnanl
703 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
704 MAP_HUGETLB and MAP_STACK defines
705 [19313] nptl: Wrong __cpu_mask for x32
706 [19347] libc: grantpt: try to force a specific gid even without pt_chown
707 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
708 [19350] math: [ldbl-128ibm] sinhl spurious overflows
709 [19351] math: [ldbl-128ibm] logl inaccurate near 1
710 [19363] time: x32: times() return value wrongly truncates/sign extends
712 [19367] dynamic-link: Improve branch prediction on Silvermont
713 [19369] network: Default domain name not reset by res_ninit when "search"
714 / "domain" entry is removed from resolv.conf
715 [19375] math: powerpc: incorrect results for POWER7 logb with negative
717 [19385] localedata: bg_BG: time separator should be colon, not comma
718 [19408] libc: linux personality syscall wrapper may erroneously return an
719 error on 32-bit architectures
720 [19415] libc: dladdr returns wrong names on hppa
721 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
722 IBM905, IBM907, and IBM909
723 [19439] math: Unix98 isinf and isnan functions conflict with C++11
724 [19443] build: build failures with -DDEBUG
725 [19451] build: Make check fails on test-double-vlen2
726 [19462] libc: Glibc failed to build with -Os
727 [19465] math: Wrong code with -Os
728 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
730 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
732 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
733 [19486] math: S390: Math tests fail with "Exception Inexact set".
734 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
735 [19550] libc: [mips] mmap negative offset handling inconsistent with other
737 [19590] math: Fail to build shared objects that use libmvec.so functions.
741 * The following bugs are resolved with this release:
743 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
744 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
745 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
746 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
747 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
748 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
749 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
750 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
751 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
752 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
753 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
754 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
755 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
756 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
757 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
758 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
759 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
760 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
761 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
762 18657, 18676, 18694, 18696, 18887.
764 * Cache information can be queried via sysconf() function on s390 e.g. with
765 _SC_LEVEL1_ICACHE_SIZE as argument.
767 * A buffer overflow in gethostbyname_r and related functions performing DNS
768 requests has been fixed. If the NSS functions were called with a
769 misaligned buffer, the buffer length change due to pointer alignment was
770 not taken into account. This could result in application crashes or,
771 potentially arbitrary code execution, using crafted, but syntactically
772 valid DNS responses. (CVE-2015-1781)
774 * The time zone file parser has been made more robust against crafted time
775 zone files, avoiding heap buffer overflows related to the processing of
776 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
777 large time zone data files. Overly long time zone specifiers in the TZ
778 variable no longer result in stack overflows and crashes.
780 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
781 for LD and GD on x86 and x86-64, has been implemented. You will need
782 binutils-2.24 or later to enable this optimization.
784 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
785 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
786 Hat). These updates cause user visible changes, such as the fix for bug
789 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
790 and getXXbyYY NSS calls for the same database, causing a denial-of-service
791 condition in some applications.
793 * Added vector math library named libmvec with the following vectorized x86_64
794 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
796 The library can be disabled with --disable-mathvec. Use of the functions is
797 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
798 Shared library libmvec.so is linked in as needed when using -lm (no need to
799 specify -lmvec explicitly for not static builds).
800 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
802 * A new fmemopen implementation has been added with the goal of POSIX
803 compliance. The new implementation fixes the following long-standing
804 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
805 old implementation is still present for use be by existing binaries.
807 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
808 releases. It has been fixed to match 2.19 and older, but binaries built
809 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
811 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
812 Contributed by Roland McGrath (Google).
814 * The header <regexp.h> is deprecated, and will be removed in a future
815 release. Use of this header will trigger a deprecation warning.
816 Application developers should update their code to use <regex.h> instead.
818 This header was formerly part of SUS, but was deprecated in 1994 and
819 removed from the standard in 2001. Also, the glibc implementation
820 leaks memory. See BZ#18681 for more details.
824 * The following bugs are resolved with this release:
826 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
827 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
828 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
829 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
830 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
831 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
832 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
833 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
834 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
835 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
838 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
839 too little memory for the to-be-scanned arguments and overflow the
840 allocated buffer. The implementation now correctly computes the required
841 buffer size when using malloc, and switches to malloc from alloca as
844 * A new semaphore algorithm has been implemented in generic C code for all
845 machines. Previous custom assembly implementations of semaphore were
846 difficult to reason about or ensure that they were safe. The new version
847 of semaphore supports machines with 64-bit or 32-bit atomic operations.
848 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
849 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
851 * Port to Altera Nios II has been contributed by Mentor Graphics.
853 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
854 implementations for powerpc64/powerpc64le.
855 Implemented by Adhemerval Zanella (IBM).
857 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
858 and powerpc64le. This may improve lock scaling of existing programs on
859 HTM capable systems. The lock elision code is only enabled with
860 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
861 powerpc will issue a transaction abort on every syscall to avoid side
862 effects being visible outside transactions.
864 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
865 AArch64. Contributed by ARM Ltd.
867 * i386 memcpy functions optimized with SSE2 unaligned load/store.
869 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
870 under certain input conditions resulting in the execution of a shell for
871 command substitution when the application did not request it. The
872 implementation now checks WRDE_NOCMD immediately before executing the
873 shell and returns the error WRDE_CMDSUB as expected.
875 * CVE-2012-3406 printf-style functions could run into a stack overflow when
876 processing format strings with a large number of format specifiers.
878 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
879 infinite loop if the DNS response contained a PTR record of an unexpected
882 * The minimum GCC version that can be used to build this version of the GNU
883 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
884 still be used to compile programs using the GNU C Library.
886 * The GNU C Library is now built with -Werror by default. This can be
887 disabled by configuring with --disable-werror.
889 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
891 * The obsolete sigvec function has been removed. This was the original
892 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
893 programs have been using instead for about 25 years. Of course, ABI
894 compatibility for old binaries using sigvec remains intact.
896 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
897 with newer versions of bison.
899 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
900 The original MIPS o32 hard-float ABI requires an FPU where double-precision
901 registers overlay two consecutive single-precision registers. MIPS32R2
902 introduced a new FPU mode (FR=1) where double-precision registers extend the
903 corresponding single-precision registers which is incompatible with the
904 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
905 require the use of FR=1 making a transition necessary. New o32 ABI
906 extensions enable users to migrate over time from the original o32 ABI
907 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
908 tracks the ABI of any loaded object and verifies that new objects are
909 compatible. Mode transitions will also be requested as required and
910 unsupportable objects will be rejected. The ABI checks include both soft and
911 hard float ABIs for o32, n32 and n64.
913 GCC 5 with GNU binutils 2.25 onwards:
914 It is strongly recommended that all o32 system libraries are built using the
915 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
916 with the original and all new o32 ABI extensions. Configure a MIPS GCC
917 compiler using --with-fp-32=xx to set this by default.
921 * The following bugs are resolved with this release:
923 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
924 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
925 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
926 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
927 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
928 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
929 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
930 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
931 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
932 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
933 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
934 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
935 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
936 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
937 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
939 * Reverted change of ABI data structures for s390 and s390x:
940 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
941 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
942 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
943 are preserved pointing straight to the same implementation as the old ones.
944 Given that, new callers will simply provide a too-big buffer to these
945 functions. Any applications/libraries out there that embed jmp_buf or
946 ucontext_t in an ABI-relevant data structure that have already been rebuilt
947 against 2.19 headers will have to rebuilt again. This is necessary in any
948 case to revert the breakage in their ABI caused by the glibc change.
950 * Support for file description locks is added to systems running the
951 Linux kernel. The standard file locking interfaces are extended to
952 operate on file descriptions, not file descriptors, via the use of
953 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
954 are associated with an open file instead of a process.
956 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
958 * The minimum Linux kernel version that this version of the GNU C Library
959 can be used with is 2.6.32.
961 * Running the testsuite no longer terminates as soon as a test fails.
962 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
963 with PASS or FAIL lines for individual tests. A summary of the results is
964 printed, including a list of failing lists, and "make check" exits with
965 error status if there were any unexpected failures. "make check
966 stop-on-test-failure=y" may be used to keep the old behavior.
968 * The am33 port, which had not worked for several years, has been removed
971 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
972 supported; they now act the same as _DEFAULT_SOURCE (but generate a
973 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
974 conflicted with POSIX (support for which was removed in 2.19), the
975 interfaces those macros enabled remain available when compiling with
976 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
979 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
981 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
982 This may improve lock scaling of existing programs on TX capable systems.
983 The lock elision code is only built with --enable-lock-elision=yes and
984 then requires a GCC version supporting the TX builtins. With lock elision
985 default mutexes are elided via __builtin_tbegin, if the cpu supports
986 transactions. By default lock elision is not enabled and the elision code
989 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
990 copy the path argument. This allowed programs to cause posix_spawn to
991 deference a dangling pointer, or use an unexpected pathname argument if
992 the string was modified after the posix_spawn_file_actions_addopen
995 * All supported architectures now use the main glibc sysdeps directory
996 instead of some being in a separate "ports" directory (which was
997 distributed separately before glibc 2.17).
999 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1000 On configurations that support it (all Linux configurations), it's now
1001 used regardless of the --enable-add-ons switch to configure. It is no
1002 longer possible to build such configurations without pthreads support.
1004 * Locale names, including those obtained from environment variables (LANG
1005 and the LC_* variables), are more tightly checked for proper syntax.
1006 setlocale will now fail (with EINVAL) for locale names that are overly
1007 long, contain slashes without starting with a slash, or contain ".." path
1008 components. (CVE-2014-0475) Previously, some valid locale names were
1009 silently replaced with the "C" locale when running in AT_SECURE mode
1010 (e.g., in a SUID program). This is no longer necessary because of the
1013 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1014 with application code using Intel MPX instructions. (With all previous
1015 versions, the MPX register state could be clobbered when making calls
1016 into or out of a shared library.) Note that while the new dynamic
1017 linker is compatible with all known x86 hardware whether or not it
1018 supports Intel MPX, some x86 instruction-set emulators might fail to
1019 handle the new instruction encodings. This is known to affect Valgrind
1020 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1021 release), and might affect other tools that do instruction emulation.
1023 * Support for loadable gconv transliteration modules has been removed.
1024 The support for transliteration modules has been non-functional for
1025 over a decade, and the removal is prompted by security defects. The
1026 normal gconv conversion modules are still supported. Transliteration
1027 with //TRANSLIT is still possible, and the //IGNORE specifier
1028 continues to be supported. (CVE-2014-5119)
1030 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1031 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1032 resulting a denial-of-service security vulnerability in applications which
1033 use functions related to iconv. (CVE-2014-6040)
1037 * The following bugs are resolved with this release:
1039 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1040 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1041 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1042 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1043 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1044 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1045 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1046 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1047 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1048 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1049 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1050 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1051 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1052 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1053 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1054 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1055 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1056 16431, 16453, 16474, 16506, 16510, 16529
1058 * Slovenian translations for glibc messages have been contributed by the
1059 Translation Project's Slovenian team of translators.
1061 * The public headers no longer use __unused nor __block. This change is to
1062 support compiling programs that are derived from BSD sources and use
1063 __unused internally, and to support compiling with Clang's -fblock
1064 extension which uses __block.
1066 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1067 large collation sequences to optimize multiple passes. This cache
1068 computation may overflow for large collation sequences and may cause a
1069 stack or buffer overflow. This is now fixed to use a slower algorithm
1070 which does not use a cache if there is an integer overflow.
1072 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1073 rules for large collation sequences to optimize multiple passes and falls
1074 back to alloca if malloc fails, resulting in a possible stack overflow.
1075 The implementation now falls back to an uncached collation sequence lookup
1078 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1079 initialized for static applications resulting in the security feature
1080 being disabled. The pointer guard is now correctly initialized to a
1081 random value for static applications. Existing static applications need
1082 to be recompiled to take advantage of the fix (bug 15754).
1084 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1085 to the d_name member of struct dirent, or omit the terminating NUL
1086 character. (Bugzilla #14699).
1088 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1089 aligned_alloc functions could allocate too few bytes or corrupt the
1090 heap when passed very large allocation size values (Bugzilla #15855,
1093 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1094 for AF_INET6 has been fixed (Bugzilla #16072).
1096 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1097 pap_CW, quz_PE, the_NP.
1099 * Substantially revised locales: gd_GB, ht_HT
1101 * The LC_ADDRESS field was updated to support country_car for almost all
1104 * ISO 1427 definitions were updated.
1106 * ISO 3166 definitions were updated.
1108 * The localedef utility now supports --big-endian and --little-endian
1109 command-line options to generate locales for a different system from that
1110 for which the C library was built.
1112 * Binary locale files now only depend on the endianness of the system for
1113 which they are generated and not on other properties of that system. As a
1114 consequence, binary files generated with new localedef may be incompatible
1115 with old versions of the GNU C Library, and binary files generated with
1116 old localedef may be incompatible with this version of the GNU C Library,
1117 in the following circumstances:
1119 + Locale files may be incompatible on m68k systems.
1121 + Locale archive files (but not separate files for individual locales) may
1122 be incompatible on systems where plain "char" is signed.
1124 * The configure option --disable-versioning has been removed. Builds with
1125 --disable-versioning had not worked for several years.
1127 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1128 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1130 * SystemTap probes for malloc have been introduced.
1132 * SystemTap probes for slow multiple precision fallback paths of
1133 transcendental functions have been introduced.
1135 * Support for powerpc64le has been added.
1137 * The soft-float powerpc port now supports e500 processors.
1139 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1141 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1142 set of header declarations that are enabled by default, even when other
1143 feature test macros or compiler options such as -std=c99 would otherwise
1144 disable some of those declarations.
1146 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1147 conflict with POSIX. The libbsd-compat library (which was a dummy library
1148 that did nothing) has also been removed.
1150 * Preliminary documentation about Multi-Thread, Async-Signal and
1151 Async-Cancel Safety has been added.
1153 * Change of ABI data structures for s390 and s390x:
1154 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1155 allow for future hardware extensions. All library functions that accept or
1156 return these structures were versioned in order to provide backwards
1157 compatibility with existing code. However, not all cases can be handled
1158 with interface versioning. If an application embeds either structure into
1159 another structure and that structure is passed to another compilation unit
1160 which expects the newer larger-sized object then any access to the new
1161 fields will result in undefined behaviour. Similarly any access to fields
1162 that were moved by the enlarging of the structures will cause undefined
1163 behaviour. To fix the undefined behaviour all objects that are part of the
1164 final in-memory image must agree on the size of structures, and this may
1165 require recompilation.
1169 * The following bugs are resolved with this release:
1171 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1172 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1173 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1174 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1175 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1176 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1177 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1178 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1179 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1180 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1181 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1182 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1183 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1186 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1187 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1188 Distributions can re-enable building and using pt_chown via the new configure
1189 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1190 considerable security risks and should only be used if the distribution
1191 understands and accepts the risks.
1193 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1196 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1197 fixed (Bugzilla #15330).
1199 * Add support for calling C++11 thread_local object destructors on thread
1200 and program exit. This needs compiler support for offloading C++11
1201 destructor calls to glibc.
1203 * Improved worst case performance of libm functions with double inputs and
1206 * Support for priority inherited mutexes in pthread condition variables on
1207 non-x86 architectures.
1209 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1211 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1213 * Optimized string functions for ARM. Implemented by Will Newton and
1216 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1218 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1221 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1222 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1224 * Added a benchmark framework to track performance of functions in glibc.
1226 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1227 It is based on draft TS 18661 and currently enabled as a GNU extension.
1229 * On Linux, the clock function now uses the clock_gettime system call
1230 for improved precision, rather than old times system call.
1232 * Added support for version-3 tz format files. This is needed when using
1233 the tz database release 2013e or later, and affects a few unusual cases --
1234 currently only TZ='America/Godthab' for time stamps after 2037.
1236 * Added new API functions pthread_getattr_default_np and
1237 pthread_setattr_default_np to get and set the default pthread
1238 attributes of a process.
1240 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1241 This may improve lock scaling of existing programs on TSX capable systems.
1242 When the --enable-lock-elision=yes parameter is specified at configure
1243 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1246 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1247 availability). Implemented by Ryan S. Arnold.
1249 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1253 * The following bugs are resolved with this release:
1255 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1256 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1257 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1258 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1259 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1260 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1261 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1262 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1263 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1264 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1265 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1266 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1267 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1268 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1269 14879, 14889, 14893, 14898, 14914.
1271 * Optimization of memcpy for MIPS.
1273 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1274 EMFILE has been fixed (Bugzilla #14889).
1276 * The add-on ports collection is now distributed in the "ports" subdirectory
1277 of the main GNU C Library distribution, rather than separately.
1279 * Port to ARM AArch64 contributed by Linaro.
1281 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1282 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1284 Implemented by Andreas Krebbel.
1286 * The new function secure_getenv allows secure access to the environment,
1287 returning NULL if running in a SUID/SGID process. This function replaces
1288 the internal function __secure_getenv.
1290 * SystemTap static probes have been added into the dynamic linker.
1291 Implemented by Gary Benson.
1293 * Optimizations of string functions strstr, strcasestr and memmem.
1294 Implemented by Maxim Kuvyrkov.
1296 * The minimum Linux kernel version that this version of the GNU C Library
1297 can be used with is 2.6.16.
1299 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1300 powerpc POWER7. Implemented by Will Schmidt.
1302 * New configure option --disable-nscd builds the C library such that it
1303 never attempts to contact the Name Service Caching Daemon (nscd).
1304 New configure option --disable-build-nscd avoids building nscd itself;
1305 this is the default if --disable-nscd is used.
1307 * Improved support for cross-compilation, including cross-testing and
1308 bootstrap builds without a previously built glibc.
1310 * Several testsuite tests are now able to test multiple IFUNC variants of an
1311 interface, rather than just testing the one that would be chooen by
1314 * New configure options --with-bugurl and --with-pkgversion, for
1315 distributors to use to embed their bug-reporting and package version
1316 information in --help and --version output.
1318 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1319 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1320 allows creation of chroots without the procfs mounted on /proc.
1322 * The `crypt' function now fails if passed salt bytes that violate the
1323 specification for those values. On Linux, the `crypt' function will
1324 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1325 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1326 when the mode is enabled.
1328 * The `clock_*' suite of functions (declared in <time.h>) is now available
1329 directly in the main C library. Previously it was necessary to link with
1330 -lrt to use these functions. This change has the effect that a
1331 single-threaded program that uses a function such as `clock_gettime' (and
1332 is not linked with -lrt) will no longer implicitly load the pthreads
1333 library at runtime and so will not suffer the overheads associated with
1334 multi-thread support in other code such as the C++ runtime library.
1336 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1341 * The following bugs are resolved with this release:
1343 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1344 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1345 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1346 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1347 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1348 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1349 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1350 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1351 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1352 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1353 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1354 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1355 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1356 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1357 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1358 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1359 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1360 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1361 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1362 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1363 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1364 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1367 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1368 configuring glibc with:
1369 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1370 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1371 Implemented by H.J. Lu.
1375 + define static_assert
1377 + do not declare gets
1379 + declare at_quick_exit and quick_exit also for ISO C11
1381 + aligned_alloc. NB: The code is deliberately allows the size parameter
1382 to not be a multiple of the alignment. This is a moronic requirement
1383 in the standard but it is only a requirement on the caller, not the
1386 + timespec_get added
1388 + uchar.h support added
1390 + CMPLX, CMPLXF, CMPLXL added
1392 Implemented by Ulrich Drepper.
1394 * Support for the IA-64 has been moved to ports.
1396 * Remove support for anything but ELF binary format
1398 * Checking versions of poll, ppoll added.
1399 Implemented by Ulrich Drepper.
1401 * More generic and 64-bit performance optimizations to math functions.
1402 Implemented by Ulrich Drepper.
1404 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1405 headers and functions available at compile time as they were before
1406 version 2.14. This option will be removed at some time in the future
1407 after the TI-RPC library becomes fully sufficient for the needs of
1408 existing applications.
1410 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1411 Note that glibc is not expected to work with any Linux kernel version
1414 * New header <sys/auxv.h> and function getauxval allowing easy access to
1415 the AT_* key-value pairs passed from the Linux kernel. The header also
1416 defines the HWCAP_* bits associated with the AT_HWCAP key.
1418 * New locales: mag_IN
1420 * New configure option --enable-systemtap builds SystemTap static probes
1421 into libc for setjmp and longjmp and into libpthread for various operations.
1422 So far the setjmp/longjmp probes and some of the libpthread probes are
1423 provided only for i*86 and x86_64.
1424 Implemented by Roland McGrath and Rayson Ho.
1426 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1428 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1431 * More optimized functions for SPARC. Implemented by David S. Miller.
1433 * Improved support for cross-compilation, especially bootstrap builds
1434 without a previously built glibc.
1436 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1437 Chris Metcalf from Tilera.
1439 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1440 now supported for ARM processors.
1442 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1443 as the name of the dynamic linker, to distinguish it from the
1444 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1446 * Support for CRIS has been removed from ports.
1448 * A new class of installed header has been documented for low-level
1449 platform-specific functionality. PowerPC added the first instance with a
1450 function to provide time base register access. Contributed by Tulio
1451 Magno Quites Machado Filho.
1453 * ix86 configurations now install header files that are consistent with
1454 what x86-64 configurations install. These same header files can be used
1455 for -m32, -m64, or -mx32 builds.
1456 Contributed by H.J. Lu.
1458 * Math library bug fixes. A thorough audit of all open math library bugs was
1459 conducted by Joseph Myers. Significant progress was made on many math
1460 library bugs resulting in more accurate exceptions and function results.
1461 Many thanks to all those that contributed including Andreas Jaeger for his
1462 patch review and work on the x87 trigonometric instruction issues.
1464 * Timezone data is no longer installed. Timezone-related binaries and scripts
1465 will continue to be installed. Users should obtain their timezone data from
1466 their distribution provider or from the tzdata package at
1467 <ftp://munnari.oz.au/pub/>.
1471 * The following bugs are resolved with this release:
1473 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1474 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1475 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1476 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1477 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1478 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1479 13484, 13506, 13515, 13523, 13524, 13538, 13540
1481 * New program pldd to list loaded object of a process
1482 Implemented by Ulrich Drepper.
1484 * Add nss_db support back to glibc. No more dependency on Berkeley db
1485 and support for initgroups lookups.
1486 Implemented by Ulrich Drepper.
1488 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1489 Contributed by HJ Lu.
1491 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1492 Contributed by HJ Lu.
1494 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1495 on x86-32 and x86-64.
1496 Contributed by Liubov Dmitrieva.
1498 * Optimized strchr and strrchr for SSE on x86-32.
1499 Contributed by Liubov Dmitrieva.
1501 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1502 for x86-64 and x86-32.
1503 Contributed by Liubov Dmitrieva.
1505 * New interfaces: scandirat, scandirat64
1506 Implemented by Ulrich Drepper.
1508 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1509 Implemented by Ulrich Drepper.
1511 * nscd now also caches the netgroup database.
1512 Implemented by Ulrich Drepper.
1514 * Integrate libm with gcc's -ffinite-math-only option.
1515 Implemented by Ulrich Drepper.
1517 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1518 to math functions. Implemented by Ulrich Drepper.
1520 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1521 Implemented by Ulrich Drepper.
1523 * New Linux interfaces: process_vm_readv, process_vm_writev
1525 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1526 Implemented by Ulrich Drepper.
1528 * Optimized nearbyint and strcasecmp for PPC.
1529 Implemented by Adhemerval Zanella.
1531 * New locales: bho_IN, unm_US, es_CU, ta_LK
1535 * The following bugs are resolved with this release:
1537 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1538 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1539 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1540 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1541 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1542 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1543 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1544 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1545 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1546 12795, 12811, 12813, 12814, 12841
1548 * The RPC implementation in libc is obsoleted. Old programs keep working
1549 but new programs cannot be linked with the routines in libc anymore.
1550 Programs in need of RPC functionality must be linked against TI-RPC.
1551 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1553 Visible changes of this change include (obviously) the inability to link
1554 programs using RPC functions without referencing the TI-RPC library and the
1555 removal of the RPC headers from the glibc headers.
1556 Implemented by Ulrich Drepper.
1558 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1559 syncfs, setns, sendmmsg
1561 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1562 yue_HK, lij_IT, mhr_RU
1564 * New encodings: CP770, CP771, CP772, CP773, CP774
1566 * New program sotruss to trace calls through PLTs
1567 Implemented by Ulrich Drepper.
1569 * The malloc hook implementation is marked deprecated and will be removed
1570 from the default implementation in the next version. The design never
1571 worked ever since the introduction of threads. Even programs which do
1572 not create threads themselves can use multiple threads created internally.
1576 * The following bugs are resolved with this release:
1578 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1579 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1580 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1581 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1584 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1586 * POWER7 optimizations: memset, memcmp, strncmp
1588 * New optimized string functions for x86-64: strnlen (SSE2),
1589 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1590 Implemented by Ulrich Drepper.
1594 * The following bugs are resolved with this release:
1596 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1597 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1598 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1599 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1600 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1601 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1602 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1603 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1605 * New interfaces: pthread_getname_np, pthread_setname_np
1607 * New Linux interface: recvmmsg
1609 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1611 * The dynamic linker now recognizes supported ABI versions from the
1612 EI_ABIVERSION field in the ELF header.
1613 Implemented by Ulrich Drepper.
1615 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1616 will not be used to fill in password fields in the passwd.byname replies.
1617 Instead it is used to synthesize the shadow.byname table, should it be
1618 missing. This is a useful mode in some installations involving Solaris.
1619 Implemented by Ulrich Drepper.
1621 * New locales: kok_IN, sq_MK, cv_RU
1625 * The following bugs are resolved with this release:
1627 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1628 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1629 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1630 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1631 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1632 10789, 10817, 10823, 10840, 10847
1634 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1636 Implemented by Ulrich Drepper.
1638 * Checking version of longjmp added that fails if an uninitialized stack
1639 frame would be created. Implemented by Ulrich Drepper.
1641 * STT_GNU_IFUNC is now supported in static executables.
1642 Implemented by H.J. Lu.
1644 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1646 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1647 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1648 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1649 Contributed by H.J. Lu.
1651 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1652 Implemented by Ulrich Drepper.
1654 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1656 Contributed by H.J. Lu.
1658 * Support for fma instruction in AVX on x86-64.
1659 Implemented by H.J. Lu and Ulrich Drepper.
1661 * AVX support in x86-64 auditing support in ld.so.
1662 Implemented by H.J. Lu.
1664 * STB_GNU_UNIQUE support added.
1665 Implemented by Ulrich Drepper.
1667 * Implement second fallback mode for optimized DNS lookup for even more
1668 broken environments. If two requests from the same port are not
1669 handled correctly close the socket and open a new one before sending
1670 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1671 can be used to select this mode right away, instead of rediscovering the
1672 necessity is every process again.
1673 Implemented by Ulrich Drepper.
1675 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1676 Implemented by Adam Tkac.
1678 * Optimized iconv conversions for S390x.
1679 Implemented by Andreas Krebbel.
1681 * Using condvars with PI mutexes is now more efficient due to kernel
1682 support for requeueing to PI futexes. NPTL support added for x86-64.
1683 Implemented by Ulrich Drepper.
1685 * New locales: ps_AF, my_MM
1689 * The following bugs are resolved with this release:
1691 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1692 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1693 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1694 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1695 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1697 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1698 Implemented by Ulrich Drepper.
1700 * New Linux interfaces: accept4, fallocate, fallocate64.
1701 Implemented by Ulrich Drepper.
1703 * Correct declarations of string function when used in C++ code. This
1704 could lead to compile errors for invalid C++ code.
1706 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1709 * New POSIX 2008 interface: psiginfo
1710 Implemented by Ulrich Drepper.
1712 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1713 Implemented by Ulrich Drepper.
1715 * Support for selecting between multiple function definitions at runtime
1716 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1718 * The libcrypt library can now use the hash function implementations in
1719 NSS. Implemented by Ulrich Drepper.
1721 * The malloc implementation can be compiled to be less memory efficient
1722 but higher performing in multi-threaded programs.
1723 Implemented by Ulrich Drepper.
1725 * New locales: nan_TW@latin, ks_IN
1727 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1728 Implemented by Ulrich Drepper.
1730 * Extended printf hook support. It is possible to use user-defined types
1731 and extend existing format specifiers.
1732 Implemented by Ulrich Drepper.
1734 * Handling for group shadow files has been added.
1735 Implemented by Ulrich Drepper.
1737 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1738 servers (the case, e.g., for some people using the built-in DNS
1739 server in ADSL modems/routers). There is a once-per-process timeout
1740 in case of a broken server. To avoid it, users can run nscd or put
1741 'options single-request' in /etc/resolv.conf.
1742 Implemented by Ulrich Drepper.
1746 * The following bugs are resolved with this release:
1748 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1749 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1750 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1751 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1752 6968, 6974, 6980, 6995, 7008, 7009, 7029
1754 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1755 up at the same time. Implemented by Ulrich Drepper.
1757 * TLS descriptors for LD and GD on x86 and x86-64.
1758 Implemented by Alexandre Oliva.
1760 * getaddrinfo now handles DCCP and UDPlite.
1761 Implemented by Ulrich Drepper.
1763 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1764 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1765 Implemented by Ulrich Drepper.
1767 * New implementation of memmem, strstr, and strcasestr which is O(n).
1768 Implemented by Eric Blake.
1770 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1772 * Implement "e" option for popen to open file descriptor with the
1773 close-on-exec flag set. Implemented by Ulrich Drepper.
1775 * Implement "b" mode for fmemopen. In this mode writes writes don't
1776 implicitly add a NUL byte and seeks from the end of the buffer really
1777 use the buffer end, not the string length as the basis.
1778 Implemented by Ulrich Drepper.
1780 * Many functions, exported and internal, now atomically set the close-on-exec
1781 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1783 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1785 Implemented by Pravin Satpute.
1787 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1791 * The following bugs are resolved with this release:
1793 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1794 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1795 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1796 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1797 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1798 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1799 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1801 * New locales: bo_CN, bo_IN, shs_CA.
1803 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1805 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1806 Implemented by Pravin Satpute.
1808 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1810 * nscd caches now all timeouts for DNS entries
1811 Implemented by Ulrich Drepper.
1813 * nscd is more efficient and wakes up less often.
1814 Implemented by Ulrich Drepper.
1816 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1817 vdprintf, and obstack_vprintf.
1818 Implemented by Jakub Jelinek.
1820 * Faster memset for x86-64.
1821 Implemented by Harsha Jagasia and H.J. Lu.
1823 * Faster memcpy on x86.
1824 Implemented by Ulrich Drepper.
1826 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1827 Implemented by Ulrich Drepper.
1829 * Faster sqrt and sqrtf implemention for some PPC variants.
1830 Implemented by Steven Munroe.
1834 * The following bugs are resolved with this release:
1836 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1837 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1838 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1839 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1840 5071, 5103, 5104, 5112, 5113, 5184, 5186
1842 * More checking functions: fread, fread_unlocked, open*, mq_open.
1843 Implemented by Jakub Jelinek and Ulrich Drepper.
1845 * Extend fortification to C++. Implemented by Jakub Jelinek.
1847 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1848 by not recognizing 'a' as a modifier when those specs are requested.
1849 Implemented by Jakub Jelinek.
1851 * PPC optimizations to math and string functions.
1852 Implemented by Steven Munroe.
1854 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1855 options to be passed. Implemented by Ulrich Drepper.
1857 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1859 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1860 Implemented by Ulrich Drepper.
1862 * Handle private futexes in the NPTL implementation.
1863 Implemented by Jakub Jelinek and Ulrich Drepper.
1865 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1866 Implemented by Roland McGrath and Ulrich Drepper.
1868 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1870 * SHA-256 and SHA-512 based password encryption.
1871 Implemented by Ulrich Drepper.
1873 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1874 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1877 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1878 Implemented by Ulrich Drepper.
1882 * The following bugs are resolved with this release:
1884 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1885 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1886 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1887 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1888 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1889 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1890 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1893 * New Linux interfaces: epoll_pwait, sched_getcpu.
1895 * New generic interfaces: strerror_l.
1897 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1901 * The following bugs are resolved with this release:
1903 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1904 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1905 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1906 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1907 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1908 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1909 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1910 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1911 3225, 3251, 3252, 3253, 3273
1913 * For Linux, the sorting of addresses returned by getaddrinfo now also
1914 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1915 Implemented by Ulrich Drepper.
1917 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1918 Implemented by Ulrich Drepper.
1920 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1922 * New iconv module for MIK. Contributed by Alexander Shopov.
1924 * For sites with broken group and/or passwd database, the auto-propagate
1925 option of nscd can prevent creating ID lookup entries from the results
1926 of a name lookup and vice versa. This usually is no problem but some
1927 site might have problems with the default behavior.
1928 Implemented by Ulrich Drepper.
1930 * Iterating over entire database in NIS can be slow. With the
1931 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1932 to trade time for memory. The entire database will be read at once.
1933 Implemented by Ulrich Drepper.
1935 * The interfaces introduced in RFC 3542 have been implemented by
1938 * Support for the new ELF hash table format was added by Ulrich Drepper.
1940 * Support for priority inheritance mutexes added by Jakub Jelinek and
1943 * Support for priority protected mutexes added by Jakub Jelinek.
1945 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1946 or_IN, csb_PL, fy_NL, sr_ME.
1950 * More overflow detection functions.
1952 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1953 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1955 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1956 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1957 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1958 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1959 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1960 by Masahide Washizawa.
1962 * It is now possible to install audit libraries for the dynamic linker using
1963 LD_AUDIT. Implemented by Ulrich Drepper.
1965 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1966 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1967 For a libc and libpthread that works well on Linux 2.4 kernels, we
1968 recommend using the stable 2.3 branch.
1970 * The new function open_wmemstream acts like open_memstream,
1971 but uses a wchar_t wide character buffer.
1973 * The new function ppoll is an improved version of poll, similar to pselect.
1975 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1976 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1977 renameat, unlinkat, linkat, symlinkat, readlinkat.
1979 * New Linux kernel system calls: unshare,
1980 inotify_init, inotify_add_watch, inotify_rm_watch.
1982 * The euidaccess function is now also known by the alias eaccess,
1983 for compatibility with some other systems.
1985 * Timezone data updated to 2006b version.
1989 * The following bugs are resolved with this release:
1991 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1992 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1993 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1994 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1995 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1996 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1998 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2000 * As of this release, GCC 4 can be used to compile the C Library.
2002 * Timezone data updated to 2005m version.
2006 * The following bugs are resolved with this release:
2008 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2009 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2010 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2011 777, 787, 821, 822, 823, 825
2013 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2017 * Support for RFC 3678. Real implementations exist only for Linux so far.
2018 Implemented by Ulrich Drepper.
2020 * nscd can now cache entries persistently. Expiring entries are reloaded.
2021 For speedups the cache can be shared in memory with client processes.
2022 Implemented by Ulrich Drepper.
2024 * nscd can now perform SELinux checks.
2025 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2027 * getaddrinfo queries are now cached. Canonical name lookup is performed
2029 Implemented by Ulrich Drepper.
2031 * The nothrow function attribute is used when headers are used by gcc when
2032 compiling C code. This can avoid significant amounts of exception
2035 * The malloc functions perform more error checking and are stricter when
2036 it comes to reacting on errors. The default action is to terminate
2037 the process after showing an error message. Implemented by Ulrich Drepper.
2039 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2040 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2042 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2043 namespaces using the new function dlmopen(). This feature is of course,
2044 like most other dynamic loading functionality, not available in statically
2045 linked applications. Implemented by Ulrich Drepper.
2047 * Low-overhead boundary checking variants of string and some stdio functions
2048 were added. These are to be used in conjunction with a gcc patch by
2049 Jakub Jelinek which adds calls to these functions if possible.
2050 Implemented by Jakub Jelinek and Ulrich Drepper.
2052 * Old code for several operating systems and machine architectures that
2053 have not been in working condition in a long time have been removed from
2054 the main source tree maintained by the GNU C Library's maintainers.
2055 These files are now reside in the separate `ports' source module
2056 that is usable as an add-on when building the library.
2060 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2061 interrogate the dynamic linker, compatible with the Solaris interface.
2063 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2064 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2066 * getifaddrs now uses the netlink interface on Linux to get its information.
2067 Implemented by Thorsten Kukuk.
2069 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2070 Implemented by Ulrich Drepper.
2072 * support for non-executable stacks on x86 has been added. Changes mostly
2075 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2078 * getaddrinfo now performs destination address selection according to
2083 * Thread-safe interfaces for many functions that access locale data
2084 were added in version 2.3, but these features were omitted from NEWS.
2085 Many functions have variants with an `_l' suffix that take a `locale_t'
2086 object as a parameter rather than consulting the current locale.
2087 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2088 create and maintain `locale_t' objects. Additionally, the new function
2089 `uselocale' sets "the current locale" (as used by functions not so
2090 parameterized) set for an individual thread. These features were added
2091 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2093 * The functions getresuid, getresgid, setresuid, and setresgid, which
2094 have long been available on Linux, are now declared in <unistd.h>
2095 and are now also available on the Hurd.
2097 * ELF thread-local storage support (TLS) now works on x86-64.
2099 * The new dynamic string token $LIB is expanded in shared library names.
2100 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2102 * Aldy Hernandez contributed complete software floating point support for
2103 PowerPC machines with no FPU.
2105 * fexecve is implemented on Linux.
2107 * The `btowc' function should work at least twice as fast due to
2108 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2110 * With approriate thread add-ons cancelable functions are now implemented
2111 in libc.so as well. No need to call the function in libpthread. This
2112 change allowed to finally disable the incorrect and expensive handling
2113 of weak definition in ld.so.
2115 * Yet more PLT entries in libc.so have been removed. We finally arrived
2116 at the bare minimum. Startup times improved appropriately.
2118 * Support for the new Linux/x86 system call interface was added. The
2119 AT_SYSINFO auxiliary vector entry is recognized and handled.
2123 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2126 * iconv (the program and the interface) now accepts empty names (excluding
2127 options like //TRANSLIT) to mean "use charset of current locale".
2129 * localedef can now transliterate characters in strings which are not in
2130 the provided charmap. The information from the input locale is used.
2132 * Prelinking support was added for ELF targets. This requires additional
2133 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2135 * Read-only stdio streams now use mmap to speed up operation by eliminating
2136 copying and buffer underflows. To use add 'm' to the mode string of
2137 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2139 * The malloc functions were completely rewritten by Wolfram Gloger based
2140 on Doug Lea's malloc-2.7.0.c.
2142 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2143 implementation of regex.
2145 * Bruno Haible upgraded the iconv and locale implementation to support
2148 * Contents of the LC_* and LANG environment variables in the CEN style are
2149 not recognized anymore. It never was used. Change by Ulrich Drepper.
2151 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2152 thread-local storage (TLS) ABI on some platforms.
2153 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2155 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2156 EUC-JISX0213, and TSCII.
2158 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2159 BSD-compatible interface for getting all network interface addresses.
2160 Implementation for IPv4 by Roland McGrath.
2162 * Loading of locale data is faster due to the introduction of a locale
2163 archive. Implemented by Roland McGrath and Ulrich Drepper.
2165 * Startup times are significantly reduced by not using exported functions
2166 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2169 * Steven Munroe contributed a port to PowerPC64/Linux.
2173 * The Hurd now uses the GNU libio implementation of stdio rather than the
2174 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2176 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2177 with the same behavior as the Linux system call of the same name.
2181 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2182 128-bit long double format.
2184 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2185 IBM1161, and IBM1162 charsets.
2187 * Andreas Jaeger contributed a port to x86-64/Linux.
2189 * Peter Bruin contributed a port to PowerPC/Hurd.
2191 * libc functions using I/O streams now can handle wide-oriented streams
2194 * optimizations in the dynamic linker. Binaries created by recent binutils
2195 versions start up quicker due to reduced time spent on relocations.
2197 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2201 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2202 asinh, atanh, j0 for the 128-bit long double format.
2204 * Bruno Haible updated all the code handling Unicode in some form to
2205 support Unicode 3.1.
2207 * Speed of regex for single-byte locales is back to previous levels.
2208 Patch by Isamu Hasegawa.
2210 * Alpha, SPARC, and IA-64 now also using floating stacks.
2212 * Startup time of internationalized applications greatly improved through
2213 iconv cache. Use iconvconfig to generate the cache file.
2214 Contributed by Ulrich Drepper.
2216 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2217 severe performance problems. Patch by David Mosberger.
2219 * The Hurd port got a lot more functionality like AIO, various stdio
2220 extensions, etc. Mainly done by Roland McGrath.
2222 * mtrace can now lookup symbols in shared libraries.
2226 * Intel's IA-64 math library is largely integrated. It provides fast and
2227 accurate implementatations for most basic and standard math functions
2228 in float, double, and long double format.
2230 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2231 and asin for the 96-bit long double format and asin, log, tan for the
2232 128-bit long double format.
2234 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2235 The basic double functions exist today. Contributed by Abraham Ziv
2236 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2237 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2239 * An asynchronous name lookup library was added. The interface is designed
2240 after POSIX AIO. The proposal was circulated beforehand to get comments.
2241 No negative ones came in. Implemented by Ulrich Drepper.
2243 * Port to S390/64bit contributed by Martin Schwidefsky
2244 <schwidefsky@de.ibm.com>.
2246 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2247 of functions for Linux/IA-64.
2249 * The RPC code is now thread safe. Threads can now use the same service
2250 of different services at the same time. Patch by Eric Norum
2251 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2253 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2254 family of functions for Linux/S390.
2256 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2257 of functions for Linux/x86.
2259 * Port to Linux/CRIS contributed by Axis Communications.
2263 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2264 we can now check for namespace violations and missing declarations. The
2265 result is that almost all headers are now Unix-compliant (as defined in
2266 the upcoming XPG6). The negative side is that some programs might need
2267 corrections, too, if they depend on the incorrect form of the headers in
2268 previous versions which defined too many symbols and included too many
2271 * regex now handles multibyte character sets correctly.
2272 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2274 * iconv (the program) does now conform to the upcoming XPG6 and handles
2275 charmaps. Instead of the charset names the path of charmaps can be
2276 provided and the conversion happens based on this data.
2277 Contributed by Ulrich Drepper.
2279 * The locale program now provides detailed information about the installed
2284 only lists the names of the supported locales
2288 provides details such as country, language, and codeset name.
2289 Contributed by Ulrich Drepper.
2293 * The gencat program now parses the input file according to the charset
2294 selected by the LC_CTYPE category. This is important for stateful
2295 character sets. To make generating catalogs easier there is a way
2296 to overwrite the charset selected by the locale: before the first
2297 message or $ quote line the catalog can contain a line like
2299 $ codeset=ISO-8859-2
2301 to select the charset (ISO-8859-2 in this case).
2303 Implemented by Shinya Hanataka and Ulrich Drepper.
2305 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2306 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2307 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2309 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2310 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2312 * The LANGUAGE environment variable is now ignored unless the locale is
2313 changed from the default "C" locale.
2315 * The usual bug fixes.
2319 * Greg McGary added runtime support for bounds checking using gcc's
2320 new -fbounded-pointers option. ix86 target is complete. PowerPC
2323 * Thorsten Kukuk added secure mode support to nscd.
2325 * The Berkeley db libraries have been removed.
2327 Related, the nss_db module is now in a separate package since it
2328 obviously requires a database library being available.
2330 * Wide character I/O streams implemented by Ulrich Drepper.
2332 * Functions from the extended socket API added by Ulrich Drepper.
2334 * Functions feenableexcept and fedisableexcept to control the
2335 behaviour of individual exceptions have been added by Andreas Jaeger.
2337 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2339 * The resolver code has been updated from bind 8.2.3-T5B which supports
2340 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2343 This change could in some situations effect backward compatibility. Since
2344 now `_res' is a thread-local instead of a global variable, modifying it
2345 in one thread does not have any effect in other threads.
2347 The resolver library was also extended to allow IPv6 as the transport
2348 protocol for the requests. This work was done by Stig Venaas.
2350 * Compatibility code for K&R C compilers has been removed from the
2351 header files. A ISO C compiler is needed to use the library
2352 (conforming to either C89 or C99 standard).
2354 * Complete rewrite of the localedef program to support multibyte character
2355 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2356 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2357 Implemented by Ulrich Drepper.
2359 Bruno Haible significantly improved the generation and use of the data
2360 structures for the wide character tables.
2362 * Plural handling in gettext implemented by Ulrich Drepper.
2364 * The utmp daemon has been removed.
2366 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2368 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2371 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2373 * POSIX barriers implemented by Kaz Kylheku.
2375 * POSIX spawn function family implemented by Ulrich Drepper.
2377 * POSIX spinlocks are now available.
2379 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2381 * the configure option --enable-kernel=X.Y.Z allows to strip out
2382 compatibility for kernel versions before X.Y.Z. This is currently only
2383 implemented for Linux.
2385 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2386 field sin6_scope_id. This means that all programs using IPv6 should be
2387 recompiled. Don't expect binary compatibility with previous glibc
2390 * various conversion modules for IBM character sets contributed by
2393 * IA-64 port by Jes Sorensen and HJ Lu.
2407 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2409 * New xdr functions are added; some rpc functions are now 64bit clean.
2411 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2413 * Fixed known incompatibilities with glibc 2.0.
2415 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2417 * Optimized a number of functions (especially the ELF dynamic loader).
2419 * Update timezone data files.
2421 * lots of charmaps corrections
2423 * some new locale definitions and charmaps
2428 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2429 conform to POSIX member type requirements. Symbol versions have been
2430 adjusted as needed within the library, and for direct use by applications,
2431 but there is potential for problems if third-party libraries use
2432 struct timeval as part of their interface. This does not present
2433 a problem for X and other "essential" system libraries.
2435 * An additional locale model to support C++ Standard Library locale
2436 model and probably more was implemented by Ulrich Drepper.
2438 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2441 * Miles Bader provided the `argp' function family to support hierachical
2442 command line argument parsing, layered on top of getopt.
2444 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2446 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2449 * scanf recognizes the %a and %A format for scanning floating point numbers.
2451 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2452 information and interfaces for the available integer types.
2454 * about 130 new math functions were added to implement the ISO C9x math
2457 * the new header <complex.h> contains definitions of the complex math
2458 functions from ISO C 9X.
2460 * the new header <tgmath.h> defines generic macros to use complex or
2461 real valued functions.
2463 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2465 * Andreas Jaeger provided a test suite for the math library.
2467 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2469 * Ulrich Drepper added character set conversion functions (iconv).
2471 * Optimized string functions have been added.
2473 * The localedata addon is now part of glibc.
2475 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2477 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2478 daemon for NSS (nscd).
2480 Missing a better place here are some numbers on improvements. Under
2481 Linux 2.1.125 un-tar-ing the kernel sources takes
2485 using local files 12.19s 6.88s 22.91s
2487 using NIS 13.92s 8.91s 26.34s
2489 using NIS & nscd 10.37s 7.34s 25.30s
2491 using NIS+ 27.57s 30.37s 640.46s
2493 using NIS+ & nscd 10.25s 7.83s 26.51s
2495 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2497 Keep in mind that non-namelookup related operations dominate above times.
2498 It was just a common complain that using NIS+ unpacking the kernel is
2501 [1] The old nscd implementation is not available anymore since it was
2502 distributed with glibc up to version 2.0.98 and thus is now replaced.
2504 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2506 * Mark Kettenis provided a Hesiod NSS module.
2508 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2509 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2511 * rcmd can now handle netgroups (Dick Streefland).
2513 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2516 * Support for the IPv6 protocol has been added to the socket API, as per the
2517 latest draft standards.
2519 * Support for Linux 2.2 has been added.
2521 * Interface changes relative to the latest 2.0.x release:
2522 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2523 addseverity NEW: Unix98
2524 alphasort64 NEW: LFS
2525 argp_err_exit_status NEW: argp, GNU ext
2526 argp_error NEW: argp, GNU ext
2527 argp_failure NEW: argp, GNU ext
2528 argp_help NEW: argp, GNU ext
2529 argp_parse NEW: argp, GNU ext
2530 argp_program_bug_address NEW: argp, GNU ext
2531 argp_program_version NEW: argp, GNU ext
2532 argp_program_version_hook NEW: argp, GNU ext
2533 argp_state_help NEW: argp, GNU ext
2534 argp_usage NEW: argp, GNU ext
2535 authdes_create NEW: Secure RPC
2536 authdes_getucred NEW: Secure RPC
2537 authdes_pk_create NEW: Secure RPC
2538 backtrace NEW: GNU ext.
2539 backtrace_symbols NEW: GNU ext.
2540 backtrace_symbols_fd NEW: GNU ext.
2542 cacosf NEW: ISO C 9x
2543 cacosh NEW: ISO C 9x
2544 cacoshf NEW: ISO C 9x
2545 cacoshl NEW: ISO C 9x
2546 cacosl NEW: ISO C 9x
2553 casinf NEW: ISO C 9x
2554 casinh NEW: ISO C 9x
2555 casinhf NEW: ISO C 9x
2556 casinhl NEW: ISO C 9x
2557 casinl NEW: ISO C 9x
2559 catanf NEW: ISO C 9x
2560 catanh NEW: ISO C 9x
2561 catanhf NEW: ISO C 9x
2562 catanhl NEW: ISO C 9x
2563 catanl NEW: ISO C 9x
2564 cbc_crypt NEW: Secure RPC
2568 ccoshf NEW: ISO C 9x
2569 ccoshl NEW: ISO C 9x
2575 cimagf NEW: ISO C 9x
2576 cimagl NEW: ISO C 9x
2577 clearerr_locked REMOVED
2578 clntunix_create NEW: sunrpc ext
2580 clog10 NEW: ISO C 9x
2581 clog10f NEW: ISO C 9x
2582 clog10l NEW: ISO C 9x
2592 cprojf NEW: ISO C 9x
2593 cprojl NEW: ISO C 9x
2595 crealf NEW: ISO C 9x
2596 creall NEW: ISO C 9x
2601 csinhf NEW: ISO C 9x
2602 csinhl NEW: ISO C 9x
2605 csqrtf NEW: ISO C 9x
2606 csqrtl NEW: ISO C 9x
2610 ctanhf NEW: ISO C 9x
2611 ctanhl NEW: ISO C 9x
2613 des_setparity NEW: Secure RPC
2614 ecb_crypt NEW: Secure RPC
2615 endutxent NEW: Unix98
2617 exp10f NEW: ISO C 9x
2618 exp10l NEW: ISO C 9x
2622 fattach NEW: STREAMS
2623 fdetach NEW: STREAMS
2627 feclearexcept NEW: ISO C 9x
2628 fegetenv NEW: ISO C 9x
2629 fegetexceptflag NEW: ISO C 9x
2630 fegetround NEW: ISO C 9x
2631 feholdexcept NEW: ISO C 9x
2633 feraiseexcept NEW: ISO C 9x
2634 ferror_locked REMOVED
2635 fesetenv NEW: ISO C 9x
2636 fesetexceptflag NEW: ISO C 9x
2637 fesetround NEW: ISO C 9x
2638 fetestexcept NEW: ISO C 9x
2639 feupdateenv NEW: ISO C 9x
2640 fflush_locked REMOVED
2644 fgets_unlocked NEW: GNU ext.
2645 fileno_locked REMOVED
2657 fputc_locked REMOVED
2658 fputs_unlocked NEW: GNU ext.
2659 fread_unlocked NEW: GNU ext.
2664 fstatvfs NEW: Unix98
2668 ftruncate64 NEW: LFS
2670 fwrite_unlocked NEW: GNU ext.
2671 gai_strerror NEW: IPv6
2675 getchar_locked REMOVED
2677 getdate_err NEW: Unix98
2678 getdate_r NEW: GNU ext.
2680 getnameinfo NEW: IPv6
2681 getnetname NEW: Secure RPC
2682 getpmsg NEW: STREAMS
2683 getpt NEW: Unix98 PTY
2684 getrlimit64 NEW: LFS
2685 getutxent NEW: Unix98
2686 getutxid NEW: Unix98
2687 getutxline NEW: Unix98
2688 glob64 NEW: GNU ext.
2689 globfree64 NEW: GNU ext.
2690 gnu_get_libc_release NEW: GNU ext.
2691 gnu_get_libc_version NEW: GNU ext.
2692 grantpt NEW: Unix98 PTY
2693 host2netname NEW: Secure RPC
2695 iconv_close NEW: iconv
2696 iconv_open NEW: iconv
2697 if_freenameindex NEW: IPv6
2698 if_indextoname NEW: IPv6
2699 if_nameindex NEW: IPv6
2700 if_nametoindex NEW: IPv6
2701 in6addr_any NEW: IPv6
2702 in6addr_loopback NEW: IPv6
2703 inet6_isipv4mapped NEW: IPv6
2704 isastream NEW: STREAMS
2705 iswblank NEW: GNU ext.
2706 key_decryptsession NEW: Secure RPC
2707 key_decryptsession_pk NEW: Secure RPC
2708 key_encryptsession NEW: Secure RPC
2709 key_encryptsession_pk NEW: Secure RPC
2710 key_gendes NEW: Secure RPC
2711 key_get_conv NEW: Secure RPC
2712 key_secretkey_is_set NEW: Secure RPC
2713 key_setnet NEW: Secure RPC
2714 key_setsecret NEW: Secure RPC
2715 llrint NEW: ISO C 9x
2716 llrintf NEW: ISO C 9x
2717 llrintl NEW: ISO C 9x
2718 llround NEW: ISO C 9x
2719 llroundf NEW: ISO C 9x
2720 llroundl NEW: ISO C 9x
2725 lrintf NEW: ISO C 9x
2726 lrintl NEW: ISO C 9x
2727 lround NEW: ISO C 9x
2728 lroundf NEW: ISO C 9x
2729 lroundl NEW: ISO C 9x
2731 makecontext NEW: Unix98
2732 mempcpy NEW: GNU ext.
2735 modify_ldt NEW: kernel
2739 nearbyint NEW: ISO C 9x
2740 nearbyintf NEW: ISO C 9x
2741 nearbyintl NEW: ISO C 9x
2742 netname2host NEW: Secure RPC
2743 netname2user NEW: Secure RPC
2744 nexttoward NEW: ISO C 9x
2745 nexttowardf NEW: ISO C 9x
2746 nexttowardl NEW: ISO C 9x
2750 passwd2des NEW: Secure RPC
2752 pow10f NEW: GNU ext.
2753 pow10l NEW: GNU ext.
2756 printf_size NEW: GNU ext.
2757 printf_size_info NEW: GNU ext.
2758 profil_counter REMOVED
2759 pthread_mutexattr_getkind_np REPLACED
2760 pthread_mutexattr_setkind_np REPLACED
2761 ptsname NEW: Unix98 PTY
2762 ptsname_r NEW: Unix98 PTY
2764 putchar_locked REMOVED
2765 putgrent NEW: GNU ext.
2767 putpmsg NEW: STREAMS
2768 pututxline NEW: Unix98
2772 readdir64_r NEW: LFS
2773 remquo NEW: ISO C 9x
2774 remquof NEW: ISO C 9x
2775 remquol NEW: ISO C 9x
2777 roundf NEW: ISO C 9x
2778 roundl NEW: ISO C 9x
2780 scalbln NEW: ISO C 9x
2781 scalblnf NEW: ISO C 9x
2782 scalblnl NEW: ISO C 9x
2784 sendfile NEW: kernel
2785 setcontext NEW: Unix98
2786 setrlimit64 NEW: LFS
2787 setutxent NEW: Unix98
2789 sigignore NEW: Unix98
2790 sigqueue NEW: POSIX.1b
2791 sigrelse NEW: Unix98
2792 sigset NEW: POSIX.1b
2793 sigtimedwait NEW: POSIX.1b
2794 sigwaitinfo NEW: POSIX.1b
2795 sincos NEW: GNU ext.
2796 sincosf NEW: GNU ext.
2797 sincosl NEW: GNU ext.
2801 strcasestr NEW: GNU ext.
2802 strtoimax NEW: ISO C 9x
2803 strtoumax NEW: ISO C 9x
2804 strverscmp NEW: GNU ext.
2805 svcauthdes_stats NEW: Secure RPC
2806 svcunix_create NEW: sunrpc etx
2807 svcunixfd_create NEW: sunrpc ext
2808 swapcontext NEW: Unix98
2809 tcgetsid NEW: Unix98 PTY
2810 tdestroy NEW: GNU ext.
2811 tgamma NEW: ISO C 9x
2812 tgammaf NEW: ISO C 9x
2813 tgammal NEW: ISO C 9x
2817 truncf NEW: ISO C 9x
2818 truncl NEW: ISO C 9x
2820 unlockpt NEW: Unix98 PTY
2821 updwtmpx NEW: Unix98
2822 user2netname NEW: Secure RPC
2823 utmpxname NEW: Unix98
2824 versionsort NEW: GNU ext.
2825 versionsort64 NEW: GNU ext.
2827 wcscasecmp NEW: GNU ext.
2828 wcsncasecmp NEW: GNU ext.
2829 wcsnlen NEW: GNU ext.
2830 wcstoimax NEW: ISO C 9x
2831 wcstoll NEW: ISO C 9x
2832 wcstoull NEW: ISO C 9x
2833 wcstoumax NEW: ISO C 9x
2835 wordexp NEW: POSIX.2
2836 wordfree NEW: POSIX.2
2837 write_profiling REMOVED
2838 xdecrypt NEW: Secure RPC
2839 xdr_authdes_cred NEW: Secure RPC
2840 xdr_authdes_verf NEW: Secure RPC
2841 xdr_cryptkeyarg NEW: Secure RPC
2842 xdr_cryptkeyarg2 NEW: Secure RPC
2843 xdr_cryptkeyres NEW: Secure RPC
2844 xdr_getcredres NEW: Secure RPC
2845 xdr_key_netstarg NEW: Secure RPC
2846 xdr_key_netstres NEW: Secure RPC
2847 xdr_keybuf NEW: Secure RPC
2848 xdr_keystatus NEW: Secure RPC
2849 xdr_netnamestr NEW: Secure RPC
2850 xdr_sizeof NEW: Secure RPC
2851 xdr_unixcred NEW: sunrpc ext
2852 xencrypt NEW: Secure RPC
2853 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2864 * inet_ntoa is thread-safe
2866 * updwtmp is moved from libutil to libc
2868 * rewrite of cbrt function
2870 * update of timezone data
2884 * add atoll function
2886 * fix complex problems in Berkeley DB code
2888 * fix math functions
2892 * fixed lots of header problems (especially Linux/GNU specific)
2894 * dynamic loader preserves all registers
2896 * Roland McGrath provided support for handling of auxiliary objects in
2897 the ELF dynamic loader.
2899 * support for parallel builds is improved
2903 * GNU extensions are no longer declared by default. To enable them you
2904 must define the macro `_GNU_SOURCE' in your program or compile with
2907 * The library has changed from using GNU ld symbol aliases to using weak
2908 symbols where available. The ELF object file format supports weak
2909 symbols; GNU ld also supports weak symbols in the a.out format. (There
2910 is also now support for other GNU ld extensions in ELF. Use the
2911 `--with-elf' option to configure to indicate you have ELF, and
2912 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2913 of many files which contained only symbol aliases, reducing the size of
2914 the source and the compiled library; many other files were renamed to
2915 less cryptic names previously occupied by the symbol alias files.
2916 There is a new header file <elf.h> for programs which operate on
2917 files in the ELF format.
2919 * Converted to Autoconf version 2, so `configure' has more options.
2920 Run `configure --help' to see the details.
2922 * The library can now be configured to build profiling, highly-optimized
2923 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2924 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2925 `configure' enable building these extra libraries. The shared library is
2926 built by default when using both ELF and GNU ld. When shared libraries
2927 are enabled, the new library `-ldl' is available for arbitrary run-time
2928 loading of shared objects; its interface is defined in <dlfcn.h>. The
2929 new header file <link.h> gives access to the internals of the run-time
2930 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2931 application of same name on other systems and it provides information
2932 about dynamically linked binaries.
2934 * The C library now provides the run-time support code for profiling
2935 executables compiled with `-pg'. Programs can control the profiling code
2936 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2937 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2938 the support for this file format was contributed by David Mosberger-Tang.
2940 * The math code has been replaced with a math library based on fdlibm from
2941 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2942 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2943 functions. The math functions now reside in a separate library, so
2944 programs using them will need to use `-lm' their linking commands.
2946 * John C. Bowman contributed optimized ix87 assembler inline functions.
2948 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2949 mechanism similar to that found in Solaris 2. This is now used for the
2950 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2951 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2952 file controls what services are used for each individual database. This
2953 works by loading shared libraries with names specified in `nsswitch.conf',
2954 so service modules can be changed or added at any time without even
2955 relinking any program. Currently there are the file, db, and NIS based
2956 NSS services available.
2958 * The new functions `strtoq' and `strtouq' parse integer values from
2959 strings, like `strtol' and `strtoul', but they return `long long int' and
2960 `unsigned long long int' values, respectively (64-bit quantities).
2962 * The new functions `strtof' and `strtold' parse floating-point values from
2963 strings, like `strtod', but they return `float' and `long double' values,
2964 respectively (on some machines `double' and `long double' are the same).
2966 * Ulrich Drepper has contributed new implementations of the floating-point
2967 printing and reading code used in the `printf' family of functions and
2968 `strtod', `strtof', and `strtold'. These new functions are perfectly
2969 accurate, and much faster than the old ones.
2971 * The implementation of the POSIX locale model was completely rewritten by
2972 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2973 to compile the POSIX locale definition.
2975 * The former dummy implementations of the strcoll and strxfrm function are
2976 now replaced by fully functional code contributed by Ulrich Drepper. The
2977 collation information comes from the POSIX locale definitions.
2979 * The new header <langinfo.h> defines an interface for accessing
2980 various locale-dependent data (using the locale chosen with `setlocale').
2982 * Ulrich Drepper has contributed a new suite of functions for operation on
2983 wide-character and multibyte-character strings, in <wchar.h>;
2984 and classification and case conversion of wide characters, in <wctype.h>.
2985 These new functions are conforming to the ISO C, Amendement 1 specification.
2987 * There is now a second implementation of the standard I/O library available.
2988 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2989 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2991 * You can now use positional parameter specifications in format strings
2992 for the `printf' and `scanf' families of functions. For example,
2993 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2994 ``Number 6, Mr Jones''. This is mainly useful when providing different
2995 format strings for different languages, whose grammars may dictate
2996 different orderings of the values being printed. To support this
2997 feature, the interface for `register_printf_handler' has changed; see
2998 the header file <printf.h> for details.
3000 * The `printf' and `scanf' families of functions now understand a new
3001 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3002 to group numbers as indicated by the locale; for `scanf' and friends, this
3003 says to accept as valid only a number with all the proper grouping
3004 separators in the right places. In the default "C" locale, numbers are
3005 not grouped; but locales for specific countries will define the usual
3006 conventions (i.e. separate thousands with `,' in the US locale).
3008 * The pgrp functions have been regularized, slightly incompatibly but much
3009 less confusingly. The core functions are now `getpgid' and `setpgid',
3010 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3011 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3012 provided for compatibility. There is no longer an incompatible `getpgrp'
3013 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3015 * The new header file <fts.h> and suite of functions simplify programs that
3016 operate on directory trees. This code comes from 4.4 BSD.
3018 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3019 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3020 NSS scheme used in glibc.
3022 * There is a new malloc debugging hook `__memalign_hook'.
3024 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3025 `unsigned int' in <sys/types.h>. These are for compatibility only and
3026 their use is discouraged.
3028 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3029 done differently, so that it works even without GNU ld.
3031 * New function `euidaccess' checks allowed access to a file like `access',
3032 but using the effective IDs instead of the real IDs.
3034 * The time zone data files have been updated for the latest and greatest
3035 local time conventions of the countries of the world.
3037 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3040 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3041 for formatting floating-point numbers. They are provided only for
3042 compatibility; new programs should use `sprintf' instead. There are
3043 also equivalent function for the `long double' floating-point type and
3044 all functions also exist in a reentrant form.
3046 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3047 functions for maintaining the login-record files (primarily of use to
3048 system programs such as `login'), and convenient functions for
3049 allocating and initializing a pseudo-terminal (pty) device.
3051 * Ulrich Drepper has contributed new support for System V style
3052 shared memory and IPC on systems that support it.
3054 * Ulrich Drepper has contributed several miscellaneous new functions found
3055 in System V: The `hsearch' family of functions provide an effective
3056 implementation of hash tables; `a64l' and `l64a' provide a very simple
3057 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3060 * Ulrich Drepper has contributed new reentrant counterparts for the
3061 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3063 * Ulrich Drepper has contributed new, highly-optimized versions of several
3064 string functions for the i486/Pentium family of processors.
3066 * Ulrich Drepper has updated the Linux-specific code, based largely
3067 on work done in Hongjiu Lu's version of GNU libc for Linux.
3068 The GNU library now supports Linux versions 2.0.10 and later,
3069 using the ELF object file format (i[3456]86-*-linux).
3071 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3073 * David Mosberger-Tang and Richard Henderson have ported the C library
3074 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3075 dynamic linking support for ELF/Alpha.
3077 * Richard Henderson contributed several Alpha optimized assembler function
3078 for arithmetic and string handling.
3080 * Ulrich Drepper has contributed a new set of message catalog functions to
3081 support multiple languages using the <libintl.h> interface, for use with
3082 his new package GNU gettext. Translation volunteers have contributed
3083 catalogs of the library's messages in Spanish, German, and Korean.
3085 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3086 program and the `catgets' function for reading the catalog files it
3087 creates. (The <libintl.h> interface is preferred; we include the
3088 <nl_types.h> interface using `catgets' only for source compatibility with
3089 programs already written to use it.)
3091 * New header file <values.h> gives SVID-compatible names for <limits.h>
3094 * Various new macros, declarations, and small header files for compatibility
3097 * New function `group_member' is a convenient way to check if a process has
3098 a given effective group ID.
3100 * When using GCC 2.7 and later, the socket functions are now declared in a
3101 special way so that passing an argument of type `struct sockaddr_in *',
3102 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3103 `struct sockaddr *' type, does not generate a type-clash warning.
3105 * New function `error' declared in header file <error.h> is a convenient
3106 function for printing error messages and optionally exiting; this is the
3107 canonical function used in GNU programs. The new functions `err', `warn',
3108 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3109 doing the same thing.
3111 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3112 POSIX.2 `glob' function to do ~ and {...} expansion.
3114 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3115 `clearenv' which is used in POSIX.9 is also available.
3117 * New function `getsid' returns session ID number on systems that support it.
3119 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3120 files <db.h> and <mpool.h> provide a rich set of functions for several
3121 types of simple databases stored in memory and in files, and <ndbm.h> is
3122 an old `ndbm'-compatible interface using the `db' functions. Link with
3123 `-ldb' to get these functions.
3125 * New macro `strdupa' copies a string like `strdup', but uses local stack
3126 space from `alloca' instead of dynamic heap space from `malloc'.
3128 * New function `strnlen' is like `strlen' but searches only a given maximum
3129 number of characters for the null terminator. `stpncpy', `strndup' and
3130 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3133 * New function `statfs' in header <sys/statfs.h>.
3135 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3136 provide convenient functions for operating on blocks of null-terminated
3139 * A new suite of functions in <utmp.h> handle all the details of reading
3140 and writing the utmp file.
3142 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3145 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3146 completely POSIX compliant and also implemented the extended functionality
3147 to handle alternate digit representation and alternate era date formats.
3149 * Ulrich Drepper provided an implementation of the `strptime' function
3150 defined in XPG4.2 which transforms a string into a `struct tm' value.
3152 * Paul Eggert provided the tzselect shell script as part of the timezone
3153 code. The shell script makes it easy to select the correct timezone
3156 * The implementation of the malloc family of functions is completely replaced
3157 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3158 The implementation uses the mmap function (if available) and it is
3159 optimized for the use in multi threaded programs.
3161 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3162 functions. This new functionality is usable by specifying a special
3163 salt string and it is compatible with implementation on *BSD systems.
3165 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3166 `getsubopt' to handle second level command line options, `bsd_signal'
3167 to access BSD style `signal' functionality, the obsolete `regexp' style
3170 * the `lchown' function is available on system which support this
3173 * The implementation of the shadow password handling function was contributed
3176 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3178 * POSIX.1g support was added. The <sys/select.h> header is available,
3179 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3180 implementation of `getaddrinfo'.
3184 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3186 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3187 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3189 * The new function `daemon' from 4.4 BSD is useful for server programs that
3190 want to put themselves in the background.
3192 * Joel Sherrill has contributed support for several standalone boards that
3193 run without an operating system.
3195 * `printf', `scanf' and friends now accept a `q' type modifier for long
3196 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3198 * All of the code taken from BSD (notably most of the math and networking
3199 routines) has been updated from the BSD 4.4-Lite release.
3201 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3203 * The new functions `getdomainname' and `setdomainname' fetch or change the
3204 YP/NIS domain name. These are system calls which exist on systems which
3207 * The time zone data files have been updated for the latest international
3210 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3211 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3215 * The C library now includes support for Sun RPC, from Sun's free
3216 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3217 are included. (There is still no support for YP.)
3219 * Tom Quinn has contributed a port of the C library to SGI machines running
3220 Irix 4 (mips-sgi-irix4).
3222 * The new `lockf' function is a simplified interface to the locking
3223 facilities of `fcntl', included for compatibility.
3225 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3227 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3229 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3232 * The error message printed by `assert' for a failed assertion now includes
3233 the name of the program (if using GNU ld) and the name of the calling
3234 function (with versions of GCC that support this).
3236 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3238 * The library now includes the <sys/mman.h> header file and memory
3239 management functions `mmap', `munmap', `mprotect', `msync', and
3240 `madvise', on systems that support those facilities.
3242 * The interface for `mcheck' has changed slightly: the function called to
3243 abort the program when an allocation inconsistency is detected now takes
3244 an argument that indicates the type of failure. The new function
3245 `mprobe' lets you request a consistency check for a particular block at
3246 any time (checks are normally done only when you call `free' or `realloc'
3249 * It is now possible to easily cross-compile the C library, building on one
3250 system a library to run on another machine and/or operating system. All
3251 you need to do is set the variable `HOST_CC' in `configparms' to the
3252 native compiler for programs to run on the machine you are building on (a
3253 few generator programs are used on Unix systems); set `CC' to the
3256 * The new function `fexecve' (only implemented on the GNU system) executes
3257 a program file given a file descriptor already open on the file.
3261 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3262 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3264 * You can set the variable `libprefix' in `configparms' to specify a prefix
3265 to be prepended to installed library files; this makes it easy to install
3266 the GNU C library to be linked as `-lgnuc' or whatever.
3268 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3269 copies a limited number of characters from a string, and returns the
3270 address of the last character written.
3272 * You no longer need to check for whether the installed `stddef.h' is
3273 compatible with the GNU C library. configure now checks for you.
3275 * You can now define a per-stream `fileno' function to convert the
3276 stream's cookie into an integral file descriptor.
3278 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3279 allocates zero bytes of storage, and returns a unique pointer which
3280 you can pass to `realloc' or `free'. The behavior is undefined if
3281 you dereference this pointer.
3283 * The C library now runs on Sony NEWS m68k machines running either
3284 NewsOS 3 or NewsOS 4.
3286 * The new `syscall' function is a system-dependent primitive function
3287 for invoking system calls. It has the canonical behavior on Unix
3288 systems, including unreliable return values for some calls (such as
3289 `pipe', `fork' and `getppid').
3291 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3292 to `EAGAIN', which is the preferred name. On systems whose kernels
3293 use two distinct codes, the C library now translates EWOULDBLOCK to
3294 EAGAIN in every system call function.
3298 * The GNU C Library Reference Manual is now distributed with the library.
3299 `make dvi' will produce a DVI file of the printed manual.
3300 `make info' will produce Info files that you can read on line using C-h i
3301 in Emacs or the `info' program.
3302 Please send comments on the manual to bug-glibc-manual@gnu.org.
3304 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3306 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3308 * Jason Merrill has contributed a port to the Sequent Symmetry running
3309 Dynix version 3 (i386-sequent-dynix).
3311 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3312 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3314 * New function `memory_warnings' lets you arrange to get warnings when
3315 malloc is running out of memory to allocate, like Emacs gives you.
3317 * The C library now contains the relocating allocator used in Emacs 19 for
3318 its editing buffers. This allocator (ralloc) minimizes allocation
3319 overhead and fragmentation by moving allocated regions around whenever it
3320 needs to. You always refer to a ralloc'd region with a "handle" (a
3321 pointer to a pointer--an object of type `void **').
3323 * There is a new `printf' format: `%m' gives you the string corresponding
3324 to the error code in `errno'.
3326 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3327 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3328 pass, the `a' modifier says to fill in a `char **' you pass with a
3331 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3332 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3333 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3335 * `mkstemp' is a traditional Unix function to atomically create and open a
3336 uniquely-named temporary file.
3340 * The standard location for the file that says what the local timezone is
3341 has changed again. It is now `/usr/local/etc/localtime' (or more
3342 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3344 * The distribution no longer contains any files with names longer than 14
3347 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3348 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3350 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3354 * The configuration process has changed quite a bit. The `configure'
3355 script is now used just like the configuration scripts for other GNU
3356 packages. The `sysdeps' directory hierarchy is much rearranged.
3357 The file `INSTALL' explains the new scheme in detail.
3359 * The header files no longer need to be processed into ANSI C and
3360 traditional C versions. There is just one set of files to install, and
3361 it will work with ANSI or old C compilers (including `gcc -traditional').
3363 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3364 MIPS DECStation running Ultrix 4.
3366 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3367 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3368 made itself into a shared library.
3370 * Yet further improved support for the i386, running 4.3 BSD-like systems
3371 (such as Mach 3 with the Unix single-server), or System V.
3373 * New function `strncasecmp' to do case-insensitive string comparison
3374 with limited length.
3376 * New function `strsep' is a reentrant alternative to `strtok'.
3378 * New functions `scandir' and `alphasort' for searching directories.
3380 * New function `setenv' is a better interface to `putenv'.
3382 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3383 function for traversing a directory tree.
3385 * The GNU obstack package is now also part of the C library.
3386 The new function `open_obstack_stream' creates a stdio stream that
3387 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3388 formatted output directly to an obstack.
3390 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3391 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3393 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3395 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3396 things to your strings.
3398 * There are some new test programs: test-fseek, testmb, and testrand.
3400 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3401 These ports are not finished, but are a good starting place for really
3402 supporting those systems.
3404 * `/etc/localtime' is now the standard location for the file that says what
3405 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3406 This follows the general principle that `/etc' is the place for all local
3407 configuration files.
3409 * The C library header files now use `extern "C"' when used by the C++
3410 compiler, so the C library should now work with C++ code.
3412 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3413 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3416 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3417 function which uses the `merge sort' algorithm, and is said to be
3418 significantly faster than the old GNU `qsort' function. Merge sort is
3419 now the standard `qsort' function. The new algorithm can require a lot
3420 of temporary storage; so, the old sorting function is called when the
3421 required storage is not available.
3423 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3424 provides the Unix `crypt' function, plus some other entry points.
3426 * The code and header files taken from 4.4 BSD have been updated with the
3427 latest files released from Berkeley.
3429 ----------------------------------------------------------------------
3430 Copyright information:
3432 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3434 Permission is granted to anyone to make or distribute verbatim copies
3435 of this document as received, in any medium, provided that the
3436 copyright notice and this permission notice are preserved,
3437 thus giving the recipient permission to redistribute in turn.
3439 Permission is granted to distribute modified versions
3440 of this document, or of portions of it,
3441 under the above conditions, provided also that they
3442 carry prominent notices stating who last changed them.
3445 version-control: never