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 minimum Linux kernel version that this version of the GNU C Library
11 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
12 kernel version 2.6.32 or later suffices (on architectures that already
13 required kernel versions more recent than 3.2, those requirements remain
14 unchanged). Linux 3.2 or later kernel headers are required on all
17 * The pap_AN locale has been deleted. This has been deprecated for a long
18 time. It has been replaced by pap_AW & pap_CW, both of which have long
19 been included in previous releases.
21 * The readdir_r and readdir64_r functions have been deprecated. It is
22 recommended to use readdir and readdir64 instead.
24 * The type “union wait” has been removed. It was deprecated in the early
25 1990s and never part of POSIX. Application code should use the int type
26 instead of “union wait”.
28 * A new NSS action is added to facilitate large distributed system
29 administration. The action, MERGE, allows remote user stores like LDAP
30 to be merged into local user stores like /etc/groups in order to provide
31 easy to use, updated, and managed sets of merged credentials. The new
32 action can be used by configuring it in /etc/nsswitch.conf:
33 group: files [SUCCESS=merge] nis
34 Implemented by Stephen Gallagher (Red Hat).
36 * The deprecated __malloc_initialize_hook variable has been removed from the
39 * The long unused localedef --old-style option has been removed. It hasn't
40 done anything in over 16 years. Scripts using this option can safely
43 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
44 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
45 return the next representable value in the direction of positive infinity
46 and the nextdown functions return the next representable value in the
47 direction of negative infinity. These are currently enabled as GNU
50 Security related changes:
52 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
53 could result in a stack overflow when getnetbyname was called with an
54 overly long name. (CVE-2016-3075)
56 * Previously, getaddrinfo copied large amounts of address data to the stack,
57 even after the fix for CVE-2013-4458 has been applied, potentially
58 resulting in a stack overflow. getaddrinfo now uses a heap allocation
59 instead. Reported by Michael Petlan. (CVE-2016-3706)
61 * The glob function suffered from a stack-based buffer overflow when it was
62 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
63 Reported by Alexander Cherepanov. (CVE-2016-1234)
65 * The Sun RPC UDP client could exhaust all available stack space when
66 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
67 alloca plugin for GCC. (CVE-2016-4429)
69 * The IPv6 name server management code in libresolv could result in a memory
70 leak for each thread which is created, performs a failing naming lookup,
71 and exits. Over time, this could result in a denial of service due to
72 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
74 The following bugs are resolved with this release:
76 [1170] localedata: ne_NP: update Nepali locale definition file
77 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
79 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
80 [6796] math: fdim() does not set errno on overflow
81 [10354] libc: posix_spawn should use vfork() in more cases than presently
82 [11213] localedata: localedata: add copyright disclaimer to locale files
83 [12143] localedata: chr_US: new Cherokee locale
84 [12450] localedata: sgs_LT: new locale
85 [12676] localedata: ln_CD: new locale
86 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
88 [13304] math: fma, fmaf, fmal produce wrong results
89 [14259] build: --localedir arg to configure is ignored
90 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
91 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
92 [14934] localedata: es_CL: wrong first weekday chilean locale
93 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
95 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
97 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
98 [15368] nptl: raise() is not async-signal-safe
99 [15479] math: ceil, floor, round and trunc raise inexact exception
100 [15578] localedata: kk_KZ: various updates
101 [16003] localedata: pap_AN: punt old locale
102 [16137] localedata: iw_IL: punt old locale
103 [16190] localedata: eo: new esperanto locale
104 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
105 [16742] malloc: race condition: pthread_atfork() called before first
106 malloc() results in unexpected locking behaviour/deadlocks
107 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
109 [16983] localedata: postal_fmt does not allow %l and %n modifiers
110 [17565] localedata: pt_PT: wrong (work-)week start
111 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
112 [17950] build: Build fails with -msse
113 [18205] localedata: be_BY*: wrong first_weekday and first_workday
114 [18433] libc: posix_spawn does not return correctly upon failure to
116 [18453] localedata: charmaps/IBM875: incorrect codes
117 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
119 [18896] localedata: he_IL: improvements for currency
120 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
122 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
124 [19056] libc: Deprecate readdir_r
125 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
127 [19198] localedata: nl_NL: small improvements for Dutch locales
128 [19257] network: Per-thread memory leak in __res_vinit with IPv6
129 nameservers (CVE-2016-5417)
130 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
132 [19400] locale: Language missing in "iso-639.def", trivial fix in
134 [19431] malloc: Deadlock between fflush, getdelim, and fork
135 [19505] libc: Incorrect file descriptor validity checks in
136 posix_spawn_file_actions_add{open,close,dup2}
137 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
139 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
140 `intl/{gettextP,loadinfo}.h'
141 [19534] libc: execle, execlp may use malloc
142 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
143 [19573] network: res_nclose and __res_maybe_init disagree about name
144 server initialization, breaking Hesiod
145 [19575] localedata: Status of GB18030 tables
146 [19581] localedata: sr_* date_fmt string contains additional newline
147 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
149 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
150 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
151 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
152 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
154 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
156 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
158 [19610] dynamic-link: ldconfig -X removes stale symbolic links
159 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
160 [19633] locale: strfmon_l applies global locale to number formatting
161 [19642] network: Memory leak in getnameinfo
162 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
163 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
165 [19654] math: [x86_64] Need testcase for BZ #19590 fix
166 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
168 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
169 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
171 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
173 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
175 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
176 pointers and lengths in error-case.
177 [19727] locale: Converting from/to UTF-xx with iconv() does not always
178 report errors on UTF-16 surrogates values.
179 [19755] nscd: nscd assertion failure in gc
180 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
181 [19759] libc: mempcpy shouldn't be inlined
182 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
183 [19765] libc: s390 needs an optimized mempcpy
184 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
185 NAME_MAX limit assumption (CVE-2016-1234)
186 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
187 [19787] network: Missing and incorrect truncation checks in getnameinfo
188 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
190 [19791] network: Assertion failure in res_query.c with un-connectable name
192 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
193 [19822] math: libm.so install clobbers old version
194 [19825] network: resolv: send_vc can return uninitialized data in second
195 response to getaddrinfo
196 [19830] network: nss_dns: should check RDATA length against buffer length
197 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
198 confronted with A/AAAA records of invalid size
199 [19837] nss: nss_db: No retries for some long lines with a larger buffer
200 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
201 [19853] stdio: Printing IBM long double in decimal with high precision is
203 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
204 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
205 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
207 [19865] network: Assertion failure or memory leak in
208 _nss_dns_getcanonname_r
209 [19868] network: nss_dns: netent code does not skip over non-PTR records
210 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
212 [19881] string: Improve x86-64 memset
213 [19907] string: Incorrect memcpy tests
214 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
216 [19925] libc: termios.h XCASE namespace
217 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
218 [19929] libc: limits.h NL_NMAX namespace
219 [19931] stdio: Memory leak in vfprintf
220 [19957] libc: clone(CLONE_VM) access invalid parent memory
221 [19963] localedata: en_IL: New locale
222 [19989] stdio: stdio.h cuserid namespace
223 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
225 [19996] locale: langinfo.h nl_langinfo_l namespace
226 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
227 [20010] network: getaddrinfo: Stack overflow in hostent translation
229 [20012] stdio: libio: fmemopen append mode failure
230 [20014] stdio: stdio.h namespace for pre-threads POSIX
231 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
232 [20023] libc: fcntl.h timespec namespace
233 [20024] math: [x86_64] vectorized sincos trashes the stack
234 [20031] network: nss_hesiod: Heap overflow in get_txt_records
235 [20041] time: sys/time.h timespec namespace
236 [20043] libc: unistd.h missing cuserid for UNIX98 and before
237 [20044] libc: unistd.h missing pthread_atfork for UNIX98
238 [20051] libc: ttyslot in wrong header under wrong conditions
239 [20054] libc: gethostname not declared for XPG4
240 [20055] libc: termios.h missing tcgetsid for XPG4
241 [20072] dynamic-link: x86 init_cpu_features is called twice in static
243 [20073] libc: sys/stat.h fchmod namespace
244 [20074] libc: stdlib.h rand_r namespace
245 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
246 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
248 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
249 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
251 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
252 [20119] libc: Wrong mask for processors level type from CPUID
253 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
254 AS not supporting AVX512
255 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
257 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
258 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
260 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
261 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
262 [20178] libc: posix_spawn{p} should not call exit
263 [20191] stdio: libio: vtables hardening
264 [20195] string: FMA4 detection requires CPUID execution with register
266 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
267 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
269 [20212] math: acos (sNaN) returns sNaN
270 [20213] math: asin (sNaN) returns sNaN
271 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
272 [20218] math: [i386] asinhl (sNaN) returns sNaN
273 [20219] math: [i386] atanhl (sNaN) returns sNaN
274 [20222] stdio: fopencookie: Mangle function pointers
275 [20224] math: [i386] cbrtl (sNaN) returns sNaN
276 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
277 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
279 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
280 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
281 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
282 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
283 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
284 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
285 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
286 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
287 [20240] math: modf (sNaN) returns sNaN
288 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
289 [20250] math: frexp (sNaN) returns sNaN
290 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
291 [20255] math: [i386] fdim, fdimf return with excess range and precision /
293 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
294 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
295 subscript is below array bounds [-Werror=array-bounds]
296 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
297 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
299 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
300 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
302 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
304 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
305 [20316] localedata: id_ID: Februari instead of Pebruari
306 [20327] string: POWER8 strcasecmp returns incorrect result
307 [20347] math: Failure: Test: j0_downward (0xap+0)
308 [20348] libc: FAIL: misc/tst-preadvwritev64
309 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
310 [20350] libc: There is no test for p{read,write}64
311 [20357] math: Incorrect cos result for 1.5174239687223976
312 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
316 * Unicode 8.0.0 Support: Character encoding, character type info, and
317 transliteration tables are all updated to Unicode 8.0.0, using new
318 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
319 These updates cause user visible changes, such as the fixes for bugs
320 89, 16061, and 18568.
322 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
323 kernel-internal CPU set size. This means that requests that change the
324 CPU affinity which failed before (for example, an all-ones CPU mask) will
325 now succeed. Applications that need to determine the effective CPU
326 affinities need to call sched_getaffinity or pthread_getaffinity_np after
327 setting it because the kernel can adjust it (and the previous size check
328 would not detect this in the majority of cases).
330 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
331 the following new symbols are used: fts64_children, fts64_close,
332 fts64_open, fts64_read and fts64_set.
334 * getaddrinfo now detects certain invalid responses on an internal netlink
335 socket. If such responses are received, an affected process will
336 terminate with an error message of "Unexpected error <number> on netlink
337 descriptor <number>" or "Unexpected netlink response of size <number> on
338 descriptor <number>". The most likely cause for these errors is a
339 multi-threaded application which erroneously closes and reuses the netlink
340 file descriptor while it is used by getaddrinfo.
342 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
343 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
344 unnecessary serialization of memory allocation requests across threads.
345 The defect is now corrected. Users should see a substantial increase in
346 the concurent throughput of allocation requests for applications which
347 trigger this bug. Affected applications typically create and
348 destroy threads frequently. (Bug 19048 was reported and analyzed by
351 * There is now a --disable-timezone-tools configure option for disabling the
352 building and installing of the timezone related utilities (zic, zdump, and
353 tzselect). This is useful for people who build the timezone data and code
354 independent of the GNU C Library.
356 * The obsolete header <regexp.h> has been removed. Programs that require
357 this header must be updated to use <regex.h> instead.
359 * The obsolete functions bdflush, create_module, get_kernel_syms,
360 query_module and uselib are no longer available to newly linked binaries;
361 the header <sys/kdaemon.h> has been removed. These functions and header
362 were specific to systems using the Linux kernel and could not usefully be
363 used with the GNU C Library on systems with version 2.6 or later of the
366 * Optimized string, wcsmbs and memory functions for IBM z13.
367 Implemented by Stefan Liebler.
369 * Newly linked programs that define a variable called signgam will no longer
370 have it set by the lgamma, lgammaf and lgammal functions. Programs that
371 require signgam to be set by those functions must ensure that they use the
372 variable provided by the GNU C Library and declared in <math.h>, without
373 defining their own copy.
375 * The minimum GCC version that can be used to build this version of the GNU
376 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
377 still be used to compile programs using the GNU C Library.
379 Security related changes:
381 * An out-of-bounds value in a broken-out struct tm argument to strftime no
382 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
384 * The LD_POINTER_GUARD environment variable can no longer be used to disable
385 the pointer guard feature. It is always enabled. Previously,
386 LD_POINTER_GUARD could be used to disable security hardening in binaries
387 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
390 * An integer overflow in hcreate and hcreate_r could lead to an
391 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
393 * The catopen function no longer has unbounded stack usage. Reported by
396 * The nan, nanf and nanl functions no longer have unbounded stack usage
397 depending on the length of the string passed as an argument to the
398 functions. Reported by Joseph Myers. (CVE-2014-9761)
400 * A stack-based buffer overflow was found in libresolv when invoked from
401 libnss_dns, allowing specially crafted DNS responses to seize control
402 of execution flow in the DNS client. The buffer overflow occurs in
403 the functions send_dg (send datagram) and send_vc (send TCP) for the
404 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
405 family. The use of AF_UNSPEC triggers the low-level resolver code to
406 send out two parallel queries for A and AAAA. A mismanagement of the
407 buffers used for those queries could result in the response of a query
408 writing beyond the alloca allocated buffer created by
409 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
410 the overflow. Thanks to the Google Security Team and Red Hat for
411 reporting the security impact of this issue, and Robert Holiday of
412 Ciena for reporting the related bug 18665. (CVE-2015-7547)
414 The following bugs are resolved with this release:
416 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
417 [887] math: Math library function "logb" and "nextafter" inconsistent
418 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
419 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
420 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
421 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
423 [4404] localedata: German translation of "Alarm clock" is misleading
424 [6799] math: nextafter() and nexttoward() doen't set errno on
425 overflow/underflow errors
426 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
428 [10432] nis: _nss_nis_setnetgrent assertion failure
429 [11460] libc: fts has no LFS support
430 [12926] network: getaddrinfo()/make_request() may spin forever
431 [13065] nptl: Race condition in pthread barriers
432 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
433 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
435 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
436 [14912] libc: Rename non-installed bits/*.h headers
437 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
438 [15367] math: Let gcc use __builtin_isinf
439 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
440 [15421] math: lgamma wrongly sets signgam for ISO C
441 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
442 FE_INVALID with argument out of range
443 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
445 [15786] dynamic-link: ifunc resolver functions can smash function
447 [15918] math: Unnecessary check for equality in hypotf()
448 [16061] localedata: Review / update transliteration data
449 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
451 [16141] time: strptime %z offset restriction
452 [16171] math: drem should be alias of remainder
453 [16296] math: fegetround is pure?
454 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
455 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
457 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
458 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
460 [16422] math: [powerpc] math-float, math-double failing llrint tests with
461 "Exception "Inexact" set" on ppc32
462 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
463 [16517] math: Missing underflow exception from tanf/tan/tanl
464 [16519] math: Missing underflow exception from sinhf
465 [16520] math: Missing underflow exception from tanhf
466 [16521] math: Missing underflow exception from exp2
467 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
469 [16734] stdio: fopen calls mmap to allocate its buffer
470 [16961] math: nan function incorrect handling of bad sequences
471 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
472 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
473 [16985] locale: localedef: confusing error message when opening output
475 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
476 [17197] locale: Redundant shift character in iconv conversion output at
478 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
479 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
480 [17250] dynamic-link: static linking breaks nss loading
481 (getaddrinfo/getpwnam/etc...)
482 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
484 [17441] math: isnan() should use __builtin_isnan() in GCC
485 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
486 (related to lock elision)
487 [17787] manual: Exponent on page 324 of the PDF ends prematurely
488 [17886] time: strptime should be able to parse "Z" as a timezone with %z
489 [17887] time: strptime should be able to parse "+01:00" style timezones
490 [17905] libc: catopen() Multiple unbounded stack allocations
492 [18084] libc: backtrace (..., 0) dumps core on x86
493 [18086] libc: nice() sets errno to 0 on success
494 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
495 is too large (CVE-2015-8778)
496 [18251] dynamic-link: SONAME missing when audit modules provides path
497 [18265] libc: add attributes for wchar string and memory functions
498 [18370] math: csqrt missing underflows
499 [18421] libc: [hppa] read-only segment has dynamic relocations
500 [18472] libc: Obsolete syscall wrappers should be compat symbols
501 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
502 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
503 [18525] localedata: Remove locale timezone information
504 [18560] libc: [powerpc] spurious bits/ipc.h definitions
505 [18568] localedata: Update locale data to Unicode 8.0
506 [18589] locale: sort-test.sh fails at random
507 [18595] math: ctan, ctanh missing underflows
508 [18604] libc: assert macro-expands its argument
509 [18610] math: S390: fetestexcept() reports any exception if DXC-code
510 contains a vector instruction exception.
511 [18611] math: j1, jn missing errno setting on underflow
512 [18618] localedata: sync Chechen locale definitions with other *_RU
514 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
515 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
516 [18665] network: In send_dg, the recvfrom function is NOT always using the
517 buffer size of a newly created buffer (CVE-2015-7547)
518 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
520 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
522 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
523 [18699] math: tilegx cproj() for various complex infinities does not yield
525 [18724] libc: Harden put*ent functions against data injection
526 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
527 [18755] build: build errors with -DNDEBUG
528 [18757] stdio: fmemopen fails to set errno on failure
529 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
531 [18781] libc: openat64 lacks O_LARGEFILE
532 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
533 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
534 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
535 [18790] math: [ldbl-128ibm] tanhl inaccurate
536 [18795] libc: stpncpy fortification misses buffer lengths that are
538 [18796] build: build fails for --disable-mathvec
539 [18803] math: hypot missing underflows
540 [18820] stdio: fmemopen may leak memory on failure
541 [18823] math: csqrt spurious underflows
542 [18824] math: fma spurious underflows
543 [18825] math: pow missing underflows
544 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
545 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
546 [18870] build: sem_open.c fails to compile with missing symbol
548 [18872] stdio: Fix memory leak in printf_positional
549 [18873] libc: posix_fallocate overflow check ineffective
550 [18875] math: Excess precision leads incorrect libm
551 [18877] libc: arm: mmap offset regression
552 [18887] libc: memory corruption when using getmntent on blank lines
553 [18918] localedata: hu_HU: change time to HH:MM:SS format
554 [18921] libc: Regression: extraneous stat() and fstat() performed by
556 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
557 binaries (CVE-2015-8777)
558 [18951] math: tgamma missing underflows
559 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
561 [18953] localedata: lt_LT: change currency symbol to the euro
562 [18956] math: powf inaccuracy
563 [18961] math: [i386] exp missing underflows
564 [18966] math: [i386] exp10 missing underflows
565 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
566 [18969] build: multiple string test failures due to missing locale
568 [18970] libc: Reference of pthread_setcancelstate in libc.a
569 [18977] math: float / long double Bessel functions not in XSI POSIX
570 [18980] math: i386 libm functions return with excess range and precision
571 [18981] math: i386 scalb*, ldexp return with excess range and precision
572 [18982] stdio: va_list and vprintf
573 [18985] time: Passing out of range data to strftime() causes a segfault
575 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
576 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
577 [19012] locale: iconv_open leaks memory on error path
578 [19016] math: clog, clog10 inaccuracy
579 [19018] nptl: Mangle function pointers in tls_dtor_list
580 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
581 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
582 [19048] malloc: malloc: arena free list can become cyclic, increasing
584 [19049] math: [powerpc] erfc incorrect zero sign
585 [19050] math: [powerpc] log* incorrect zero sign
586 [19058] math: [x86_64] Link fail with -fopenmp and -flto
587 [19059] math: nexttoward overflow incorrect in non-default rounding modes
588 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
589 [19074] network: Data race in _res_hconf_reorder_addrs
590 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
591 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
592 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
594 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
596 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
597 [19086] manual: posix_fallocate64 documented argument order is wrong.
598 [19088] math: lround, llround missing exceptions close to overflow
600 [19094] math: lrint, llrint missing exceptions close to overflow threshold
601 [19095] math: dbl-64 lrint incorrect for 64-bit long
602 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
603 [19124] dynamic-link: ld.so failed to build with older assmebler
604 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
605 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
606 [19134] math: [powerpc32] lround, lroundf spurious exceptions
607 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
608 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
609 pthread_setaffinity_np
610 [19156] math: [ldbl-128] j0l spurious underflows
611 [19164] nptl: tst-getcpu fails with many possible CPUs
612 [19168] math: math/test-ildoubl and math/test-ldouble failure
613 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
614 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
616 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
617 (FE_NOMASK_ENV) do not clear SSE exceptions
618 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
619 _int_new_arena/reused_arena
620 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
621 [19201] math: dbl-64 remainder incorrect sign of zero result
622 [19205] math: bits/math-finite.h conditions do not match math.h and
624 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
625 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
626 for C99-based standards
627 [19212] libc: features.h not -Wundef clean
628 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
630 [19214] libc: Family and model identification for AMD CPU's are incorrect.
631 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
632 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
634 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
636 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
638 [19242] libc: strtol incorrect in Turkish locales
639 [19243] malloc: reused_arena can pick an arena on the free list, leading
640 to an assertion failure and reference count corruption
641 [19253] time: tzset() ineffective when temporary TZ did not include DST
643 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
644 [19270] math: [hppa] Shared libm missing __isnanl
645 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
646 MAP_HUGETLB and MAP_STACK defines
647 [19313] nptl: Wrong __cpu_mask for x32
648 [19347] libc: grantpt: try to force a specific gid even without pt_chown
649 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
650 [19350] math: [ldbl-128ibm] sinhl spurious overflows
651 [19351] math: [ldbl-128ibm] logl inaccurate near 1
652 [19363] time: x32: times() return value wrongly truncates/sign extends
654 [19367] dynamic-link: Improve branch prediction on Silvermont
655 [19369] network: Default domain name not reset by res_ninit when "search"
656 / "domain" entry is removed from resolv.conf
657 [19375] math: powerpc: incorrect results for POWER7 logb with negative
659 [19385] localedata: bg_BG: time separator should be colon, not comma
660 [19408] libc: linux personality syscall wrapper may erroneously return an
661 error on 32-bit architectures
662 [19415] libc: dladdr returns wrong names on hppa
663 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
664 IBM905, IBM907, and IBM909
665 [19439] math: Unix98 isinf and isnan functions conflict with C++11
666 [19443] build: build failures with -DDEBUG
667 [19451] build: Make check fails on test-double-vlen2
668 [19462] libc: Glibc failed to build with -Os
669 [19465] math: Wrong code with -Os
670 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
672 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
674 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
675 [19486] math: S390: Math tests fail with "Exception Inexact set".
676 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
677 [19550] libc: [mips] mmap negative offset handling inconsistent with other
679 [19590] math: Fail to build shared objects that use libmvec.so functions.
683 * The following bugs are resolved with this release:
685 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
686 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
687 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
688 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
689 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
690 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
691 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
692 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
693 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
694 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
695 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
696 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
697 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
698 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
699 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
700 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
701 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
702 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
703 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
704 18657, 18676, 18694, 18696, 18887.
706 * Cache information can be queried via sysconf() function on s390 e.g. with
707 _SC_LEVEL1_ICACHE_SIZE as argument.
709 * A buffer overflow in gethostbyname_r and related functions performing DNS
710 requests has been fixed. If the NSS functions were called with a
711 misaligned buffer, the buffer length change due to pointer alignment was
712 not taken into account. This could result in application crashes or,
713 potentially arbitrary code execution, using crafted, but syntactically
714 valid DNS responses. (CVE-2015-1781)
716 * The time zone file parser has been made more robust against crafted time
717 zone files, avoiding heap buffer overflows related to the processing of
718 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
719 large time zone data files. Overly long time zone specifiers in the TZ
720 variable no longer result in stack overflows and crashes.
722 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
723 for LD and GD on x86 and x86-64, has been implemented. You will need
724 binutils-2.24 or later to enable this optimization.
726 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
727 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
728 Hat). These updates cause user visible changes, such as the fix for bug
731 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
732 and getXXbyYY NSS calls for the same database, causing a denial-of-service
733 condition in some applications.
735 * Added vector math library named libmvec with the following vectorized x86_64
736 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
738 The library can be disabled with --disable-mathvec. Use of the functions is
739 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
740 Shared library libmvec.so is linked in as needed when using -lm (no need to
741 specify -lmvec explicitly for not static builds).
742 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
744 * A new fmemopen implementation has been added with the goal of POSIX
745 compliance. The new implementation fixes the following long-standing
746 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
747 old implementation is still present for use be by existing binaries.
749 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
750 releases. It has been fixed to match 2.19 and older, but binaries built
751 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
753 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
754 Contributed by Roland McGrath (Google).
756 * The header <regexp.h> is deprecated, and will be removed in a future
757 release. Use of this header will trigger a deprecation warning.
758 Application developers should update their code to use <regex.h> instead.
760 This header was formerly part of SUS, but was deprecated in 1994 and
761 removed from the standard in 2001. Also, the glibc implementation
762 leaks memory. See BZ#18681 for more details.
766 * The following bugs are resolved with this release:
768 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
769 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
770 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
771 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
772 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
773 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
774 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
775 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
776 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
777 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
780 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
781 too little memory for the to-be-scanned arguments and overflow the
782 allocated buffer. The implementation now correctly computes the required
783 buffer size when using malloc, and switches to malloc from alloca as
786 * A new semaphore algorithm has been implemented in generic C code for all
787 machines. Previous custom assembly implementations of semaphore were
788 difficult to reason about or ensure that they were safe. The new version
789 of semaphore supports machines with 64-bit or 32-bit atomic operations.
790 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
791 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
793 * Port to Altera Nios II has been contributed by Mentor Graphics.
795 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
796 implementations for powerpc64/powerpc64le.
797 Implemented by Adhemerval Zanella (IBM).
799 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
800 and powerpc64le. This may improve lock scaling of existing programs on
801 HTM capable systems. The lock elision code is only enabled with
802 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
803 powerpc will issue a transaction abort on every syscall to avoid side
804 effects being visible outside transactions.
806 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
807 AArch64. Contributed by ARM Ltd.
809 * i386 memcpy functions optimized with SSE2 unaligned load/store.
811 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
812 under certain input conditions resulting in the execution of a shell for
813 command substitution when the application did not request it. The
814 implementation now checks WRDE_NOCMD immediately before executing the
815 shell and returns the error WRDE_CMDSUB as expected.
817 * CVE-2012-3406 printf-style functions could run into a stack overflow when
818 processing format strings with a large number of format specifiers.
820 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
821 infinite loop if the DNS response contained a PTR record of an unexpected
824 * The minimum GCC version that can be used to build this version of the GNU
825 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
826 still be used to compile programs using the GNU C Library.
828 * The GNU C Library is now built with -Werror by default. This can be
829 disabled by configuring with --disable-werror.
831 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
833 * The obsolete sigvec function has been removed. This was the original
834 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
835 programs have been using instead for about 25 years. Of course, ABI
836 compatibility for old binaries using sigvec remains intact.
838 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
839 with newer versions of bison.
841 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
842 The original MIPS o32 hard-float ABI requires an FPU where double-precision
843 registers overlay two consecutive single-precision registers. MIPS32R2
844 introduced a new FPU mode (FR=1) where double-precision registers extend the
845 corresponding single-precision registers which is incompatible with the
846 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
847 require the use of FR=1 making a transition necessary. New o32 ABI
848 extensions enable users to migrate over time from the original o32 ABI
849 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
850 tracks the ABI of any loaded object and verifies that new objects are
851 compatible. Mode transitions will also be requested as required and
852 unsupportable objects will be rejected. The ABI checks include both soft and
853 hard float ABIs for o32, n32 and n64.
855 GCC 5 with GNU binutils 2.25 onwards:
856 It is strongly recommended that all o32 system libraries are built using the
857 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
858 with the original and all new o32 ABI extensions. Configure a MIPS GCC
859 compiler using --with-fp-32=xx to set this by default.
863 * The following bugs are resolved with this release:
865 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
866 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
867 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
868 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
869 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
870 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
871 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
872 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
873 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
874 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
875 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
876 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
877 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
878 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
879 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
881 * Reverted change of ABI data structures for s390 and s390x:
882 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
883 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
884 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
885 are preserved pointing straight to the same implementation as the old ones.
886 Given that, new callers will simply provide a too-big buffer to these
887 functions. Any applications/libraries out there that embed jmp_buf or
888 ucontext_t in an ABI-relevant data structure that have already been rebuilt
889 against 2.19 headers will have to rebuilt again. This is necessary in any
890 case to revert the breakage in their ABI caused by the glibc change.
892 * Support for file description locks is added to systems running the
893 Linux kernel. The standard file locking interfaces are extended to
894 operate on file descriptions, not file descriptors, via the use of
895 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
896 are associated with an open file instead of a process.
898 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
900 * The minimum Linux kernel version that this version of the GNU C Library
901 can be used with is 2.6.32.
903 * Running the testsuite no longer terminates as soon as a test fails.
904 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
905 with PASS or FAIL lines for individual tests. A summary of the results is
906 printed, including a list of failing lists, and "make check" exits with
907 error status if there were any unexpected failures. "make check
908 stop-on-test-failure=y" may be used to keep the old behavior.
910 * The am33 port, which had not worked for several years, has been removed
913 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
914 supported; they now act the same as _DEFAULT_SOURCE (but generate a
915 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
916 conflicted with POSIX (support for which was removed in 2.19), the
917 interfaces those macros enabled remain available when compiling with
918 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
921 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
923 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
924 This may improve lock scaling of existing programs on TX capable systems.
925 The lock elision code is only built with --enable-lock-elision=yes and
926 then requires a GCC version supporting the TX builtins. With lock elision
927 default mutexes are elided via __builtin_tbegin, if the cpu supports
928 transactions. By default lock elision is not enabled and the elision code
931 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
932 copy the path argument. This allowed programs to cause posix_spawn to
933 deference a dangling pointer, or use an unexpected pathname argument if
934 the string was modified after the posix_spawn_file_actions_addopen
937 * All supported architectures now use the main glibc sysdeps directory
938 instead of some being in a separate "ports" directory (which was
939 distributed separately before glibc 2.17).
941 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
942 On configurations that support it (all Linux configurations), it's now
943 used regardless of the --enable-add-ons switch to configure. It is no
944 longer possible to build such configurations without pthreads support.
946 * Locale names, including those obtained from environment variables (LANG
947 and the LC_* variables), are more tightly checked for proper syntax.
948 setlocale will now fail (with EINVAL) for locale names that are overly
949 long, contain slashes without starting with a slash, or contain ".." path
950 components. (CVE-2014-0475) Previously, some valid locale names were
951 silently replaced with the "C" locale when running in AT_SECURE mode
952 (e.g., in a SUID program). This is no longer necessary because of the
955 * On x86-64, the dynamic linker's lazy-binding support is now compatible
956 with application code using Intel MPX instructions. (With all previous
957 versions, the MPX register state could be clobbered when making calls
958 into or out of a shared library.) Note that while the new dynamic
959 linker is compatible with all known x86 hardware whether or not it
960 supports Intel MPX, some x86 instruction-set emulators might fail to
961 handle the new instruction encodings. This is known to affect Valgrind
962 versions up through 3.9 (but will be fixed in the forthcoming 3.10
963 release), and might affect other tools that do instruction emulation.
965 * Support for loadable gconv transliteration modules has been removed.
966 The support for transliteration modules has been non-functional for
967 over a decade, and the removal is prompted by security defects. The
968 normal gconv conversion modules are still supported. Transliteration
969 with //TRANSLIT is still possible, and the //IGNORE specifier
970 continues to be supported. (CVE-2014-5119)
972 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
973 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
974 resulting a denial-of-service security vulnerability in applications which
975 use functions related to iconv. (CVE-2014-6040)
979 * The following bugs are resolved with this release:
981 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
982 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
983 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
984 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
985 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
986 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
987 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
988 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
989 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
990 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
991 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
992 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
993 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
994 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
995 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
996 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
997 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
998 16431, 16453, 16474, 16506, 16510, 16529
1000 * Slovenian translations for glibc messages have been contributed by the
1001 Translation Project's Slovenian team of translators.
1003 * The public headers no longer use __unused nor __block. This change is to
1004 support compiling programs that are derived from BSD sources and use
1005 __unused internally, and to support compiling with Clang's -fblock
1006 extension which uses __block.
1008 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1009 large collation sequences to optimize multiple passes. This cache
1010 computation may overflow for large collation sequences and may cause a
1011 stack or buffer overflow. This is now fixed to use a slower algorithm
1012 which does not use a cache if there is an integer overflow.
1014 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1015 rules for large collation sequences to optimize multiple passes and falls
1016 back to alloca if malloc fails, resulting in a possible stack overflow.
1017 The implementation now falls back to an uncached collation sequence lookup
1020 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1021 initialized for static applications resulting in the security feature
1022 being disabled. The pointer guard is now correctly initialized to a
1023 random value for static applications. Existing static applications need
1024 to be recompiled to take advantage of the fix (bug 15754).
1026 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1027 to the d_name member of struct dirent, or omit the terminating NUL
1028 character. (Bugzilla #14699).
1030 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1031 aligned_alloc functions could allocate too few bytes or corrupt the
1032 heap when passed very large allocation size values (Bugzilla #15855,
1035 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1036 for AF_INET6 has been fixed (Bugzilla #16072).
1038 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1039 pap_CW, quz_PE, the_NP.
1041 * Substantially revised locales: gd_GB, ht_HT
1043 * The LC_ADDRESS field was updated to support country_car for almost all
1046 * ISO 1427 definitions were updated.
1048 * ISO 3166 definitions were updated.
1050 * The localedef utility now supports --big-endian and --little-endian
1051 command-line options to generate locales for a different system from that
1052 for which the C library was built.
1054 * Binary locale files now only depend on the endianness of the system for
1055 which they are generated and not on other properties of that system. As a
1056 consequence, binary files generated with new localedef may be incompatible
1057 with old versions of the GNU C Library, and binary files generated with
1058 old localedef may be incompatible with this version of the GNU C Library,
1059 in the following circumstances:
1061 + Locale files may be incompatible on m68k systems.
1063 + Locale archive files (but not separate files for individual locales) may
1064 be incompatible on systems where plain "char" is signed.
1066 * The configure option --disable-versioning has been removed. Builds with
1067 --disable-versioning had not worked for several years.
1069 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1070 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1072 * SystemTap probes for malloc have been introduced.
1074 * SystemTap probes for slow multiple precision fallback paths of
1075 transcendental functions have been introduced.
1077 * Support for powerpc64le has been added.
1079 * The soft-float powerpc port now supports e500 processors.
1081 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1083 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1084 set of header declarations that are enabled by default, even when other
1085 feature test macros or compiler options such as -std=c99 would otherwise
1086 disable some of those declarations.
1088 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1089 conflict with POSIX. The libbsd-compat library (which was a dummy library
1090 that did nothing) has also been removed.
1092 * Preliminary documentation about Multi-Thread, Async-Signal and
1093 Async-Cancel Safety has been added.
1095 * Change of ABI data structures for s390 and s390x:
1096 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1097 allow for future hardware extensions. All library functions that accept or
1098 return these structures were versioned in order to provide backwards
1099 compatibility with existing code. However, not all cases can be handled
1100 with interface versioning. If an application embeds either structure into
1101 another structure and that structure is passed to another compilation unit
1102 which expects the newer larger-sized object then any access to the new
1103 fields will result in undefined behaviour. Similarly any access to fields
1104 that were moved by the enlarging of the structures will cause undefined
1105 behaviour. To fix the undefined behaviour all objects that are part of the
1106 final in-memory image must agree on the size of structures, and this may
1107 require recompilation.
1111 * The following bugs are resolved with this release:
1113 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1114 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1115 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1116 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1117 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1118 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1119 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1120 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1121 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1122 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1123 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1124 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1125 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1128 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1129 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1130 Distributions can re-enable building and using pt_chown via the new configure
1131 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1132 considerable security risks and should only be used if the distribution
1133 understands and accepts the risks.
1135 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1138 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1139 fixed (Bugzilla #15330).
1141 * Add support for calling C++11 thread_local object destructors on thread
1142 and program exit. This needs compiler support for offloading C++11
1143 destructor calls to glibc.
1145 * Improved worst case performance of libm functions with double inputs and
1148 * Support for priority inherited mutexes in pthread condition variables on
1149 non-x86 architectures.
1151 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1153 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1155 * Optimized string functions for ARM. Implemented by Will Newton and
1158 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1160 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1163 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1164 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1166 * Added a benchmark framework to track performance of functions in glibc.
1168 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1169 It is based on draft TS 18661 and currently enabled as a GNU extension.
1171 * On Linux, the clock function now uses the clock_gettime system call
1172 for improved precision, rather than old times system call.
1174 * Added support for version-3 tz format files. This is needed when using
1175 the tz database release 2013e or later, and affects a few unusual cases --
1176 currently only TZ='America/Godthab' for time stamps after 2037.
1178 * Added new API functions pthread_getattr_default_np and
1179 pthread_setattr_default_np to get and set the default pthread
1180 attributes of a process.
1182 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1183 This may improve lock scaling of existing programs on TSX capable systems.
1184 When the --enable-lock-elision=yes parameter is specified at configure
1185 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1188 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1189 availability). Implemented by Ryan S. Arnold.
1191 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1195 * The following bugs are resolved with this release:
1197 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1198 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1199 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1200 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1201 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1202 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1203 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1204 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1205 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1206 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1207 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1208 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1209 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1210 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1211 14879, 14889, 14893, 14898, 14914.
1213 * Optimization of memcpy for MIPS.
1215 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1216 EMFILE has been fixed (Bugzilla #14889).
1218 * The add-on ports collection is now distributed in the "ports" subdirectory
1219 of the main GNU C Library distribution, rather than separately.
1221 * Port to ARM AArch64 contributed by Linaro.
1223 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1224 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1226 Implemented by Andreas Krebbel.
1228 * The new function secure_getenv allows secure access to the environment,
1229 returning NULL if running in a SUID/SGID process. This function replaces
1230 the internal function __secure_getenv.
1232 * SystemTap static probes have been added into the dynamic linker.
1233 Implemented by Gary Benson.
1235 * Optimizations of string functions strstr, strcasestr and memmem.
1236 Implemented by Maxim Kuvyrkov.
1238 * The minimum Linux kernel version that this version of the GNU C Library
1239 can be used with is 2.6.16.
1241 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1242 powerpc POWER7. Implemented by Will Schmidt.
1244 * New configure option --disable-nscd builds the C library such that it
1245 never attempts to contact the Name Service Caching Daemon (nscd).
1246 New configure option --disable-build-nscd avoids building nscd itself;
1247 this is the default if --disable-nscd is used.
1249 * Improved support for cross-compilation, including cross-testing and
1250 bootstrap builds without a previously built glibc.
1252 * Several testsuite tests are now able to test multiple IFUNC variants of an
1253 interface, rather than just testing the one that would be chooen by
1256 * New configure options --with-bugurl and --with-pkgversion, for
1257 distributors to use to embed their bug-reporting and package version
1258 information in --help and --version output.
1260 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1261 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1262 allows creation of chroots without the procfs mounted on /proc.
1264 * The `crypt' function now fails if passed salt bytes that violate the
1265 specification for those values. On Linux, the `crypt' function will
1266 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1267 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1268 when the mode is enabled.
1270 * The `clock_*' suite of functions (declared in <time.h>) is now available
1271 directly in the main C library. Previously it was necessary to link with
1272 -lrt to use these functions. This change has the effect that a
1273 single-threaded program that uses a function such as `clock_gettime' (and
1274 is not linked with -lrt) will no longer implicitly load the pthreads
1275 library at runtime and so will not suffer the overheads associated with
1276 multi-thread support in other code such as the C++ runtime library.
1278 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1283 * The following bugs are resolved with this release:
1285 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1286 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1287 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1288 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1289 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1290 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1291 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1292 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1293 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1294 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1295 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1296 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1297 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1298 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1299 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1300 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1301 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1302 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1303 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1304 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1305 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1306 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1309 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1310 configuring glibc with:
1311 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1312 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1313 Implemented by H.J. Lu.
1317 + define static_assert
1319 + do not declare gets
1321 + declare at_quick_exit and quick_exit also for ISO C11
1323 + aligned_alloc. NB: The code is deliberately allows the size parameter
1324 to not be a multiple of the alignment. This is a moronic requirement
1325 in the standard but it is only a requirement on the caller, not the
1328 + timespec_get added
1330 + uchar.h support added
1332 + CMPLX, CMPLXF, CMPLXL added
1334 Implemented by Ulrich Drepper.
1336 * Support for the IA-64 has been moved to ports.
1338 * Remove support for anything but ELF binary format
1340 * Checking versions of poll, ppoll added.
1341 Implemented by Ulrich Drepper.
1343 * More generic and 64-bit performance optimizations to math functions.
1344 Implemented by Ulrich Drepper.
1346 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1347 headers and functions available at compile time as they were before
1348 version 2.14. This option will be removed at some time in the future
1349 after the TI-RPC library becomes fully sufficient for the needs of
1350 existing applications.
1352 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1353 Note that glibc is not expected to work with any Linux kernel version
1356 * New header <sys/auxv.h> and function getauxval allowing easy access to
1357 the AT_* key-value pairs passed from the Linux kernel. The header also
1358 defines the HWCAP_* bits associated with the AT_HWCAP key.
1360 * New locales: mag_IN
1362 * New configure option --enable-systemtap builds SystemTap static probes
1363 into libc for setjmp and longjmp and into libpthread for various operations.
1364 So far the setjmp/longjmp probes and some of the libpthread probes are
1365 provided only for i*86 and x86_64.
1366 Implemented by Roland McGrath and Rayson Ho.
1368 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1370 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1373 * More optimized functions for SPARC. Implemented by David S. Miller.
1375 * Improved support for cross-compilation, especially bootstrap builds
1376 without a previously built glibc.
1378 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1379 Chris Metcalf from Tilera.
1381 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1382 now supported for ARM processors.
1384 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1385 as the name of the dynamic linker, to distinguish it from the
1386 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1388 * Support for CRIS has been removed from ports.
1390 * A new class of installed header has been documented for low-level
1391 platform-specific functionality. PowerPC added the first instance with a
1392 function to provide time base register access. Contributed by Tulio
1393 Magno Quites Machado Filho.
1395 * ix86 configurations now install header files that are consistent with
1396 what x86-64 configurations install. These same header files can be used
1397 for -m32, -m64, or -mx32 builds.
1398 Contributed by H.J. Lu.
1400 * Math library bug fixes. A thorough audit of all open math library bugs was
1401 conducted by Joseph Myers. Significant progress was made on many math
1402 library bugs resulting in more accurate exceptions and function results.
1403 Many thanks to all those that contributed including Andreas Jaeger for his
1404 patch review and work on the x87 trigonometric instruction issues.
1406 * Timezone data is no longer installed. Timezone-related binaries and scripts
1407 will continue to be installed. Users should obtain their timezone data from
1408 their distribution provider or from the tzdata package at
1409 <ftp://munnari.oz.au/pub/>.
1413 * The following bugs are resolved with this release:
1415 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1416 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1417 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1418 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1419 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1420 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1421 13484, 13506, 13515, 13523, 13524, 13538, 13540
1423 * New program pldd to list loaded object of a process
1424 Implemented by Ulrich Drepper.
1426 * Add nss_db support back to glibc. No more dependency on Berkeley db
1427 and support for initgroups lookups.
1428 Implemented by Ulrich Drepper.
1430 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1431 Contributed by HJ Lu.
1433 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1434 Contributed by HJ Lu.
1436 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1437 on x86-32 and x86-64.
1438 Contributed by Liubov Dmitrieva.
1440 * Optimized strchr and strrchr for SSE on x86-32.
1441 Contributed by Liubov Dmitrieva.
1443 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1444 for x86-64 and x86-32.
1445 Contributed by Liubov Dmitrieva.
1447 * New interfaces: scandirat, scandirat64
1448 Implemented by Ulrich Drepper.
1450 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1451 Implemented by Ulrich Drepper.
1453 * nscd now also caches the netgroup database.
1454 Implemented by Ulrich Drepper.
1456 * Integrate libm with gcc's -ffinite-math-only option.
1457 Implemented by Ulrich Drepper.
1459 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1460 to math functions. Implemented by Ulrich Drepper.
1462 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1463 Implemented by Ulrich Drepper.
1465 * New Linux interfaces: process_vm_readv, process_vm_writev
1467 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1468 Implemented by Ulrich Drepper.
1470 * Optimized nearbyint and strcasecmp for PPC.
1471 Implemented by Adhemerval Zanella.
1473 * New locales: bho_IN, unm_US, es_CU, ta_LK
1477 * The following bugs are resolved with this release:
1479 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1480 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1481 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1482 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1483 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1484 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1485 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1486 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1487 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1488 12795, 12811, 12813, 12814, 12841
1490 * The RPC implementation in libc is obsoleted. Old programs keep working
1491 but new programs cannot be linked with the routines in libc anymore.
1492 Programs in need of RPC functionality must be linked against TI-RPC.
1493 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1495 Visible changes of this change include (obviously) the inability to link
1496 programs using RPC functions without referencing the TI-RPC library and the
1497 removal of the RPC headers from the glibc headers.
1498 Implemented by Ulrich Drepper.
1500 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1501 syncfs, setns, sendmmsg
1503 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1504 yue_HK, lij_IT, mhr_RU
1506 * New encodings: CP770, CP771, CP772, CP773, CP774
1508 * New program sotruss to trace calls through PLTs
1509 Implemented by Ulrich Drepper.
1511 * The malloc hook implementation is marked deprecated and will be removed
1512 from the default implementation in the next version. The design never
1513 worked ever since the introduction of threads. Even programs which do
1514 not create threads themselves can use multiple threads created internally.
1518 * The following bugs are resolved with this release:
1520 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1521 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1522 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1523 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1526 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1528 * POWER7 optimizations: memset, memcmp, strncmp
1530 * New optimized string functions for x86-64: strnlen (SSE2),
1531 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1532 Implemented by Ulrich Drepper.
1536 * The following bugs are resolved with this release:
1538 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1539 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1540 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1541 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1542 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1543 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1544 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1545 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1547 * New interfaces: pthread_getname_np, pthread_setname_np
1549 * New Linux interface: recvmmsg
1551 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1553 * The dynamic linker now recognizes supported ABI versions from the
1554 EI_ABIVERSION field in the ELF header.
1555 Implemented by Ulrich Drepper.
1557 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1558 will not be used to fill in password fields in the passwd.byname replies.
1559 Instead it is used to synthesize the shadow.byname table, should it be
1560 missing. This is a useful mode in some installations involving Solaris.
1561 Implemented by Ulrich Drepper.
1563 * New locales: kok_IN, sq_MK, cv_RU
1567 * The following bugs are resolved with this release:
1569 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1570 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1571 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1572 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1573 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1574 10789, 10817, 10823, 10840, 10847
1576 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1578 Implemented by Ulrich Drepper.
1580 * Checking version of longjmp added that fails if an uninitialized stack
1581 frame would be created. Implemented by Ulrich Drepper.
1583 * STT_GNU_IFUNC is now supported in static executables.
1584 Implemented by H.J. Lu.
1586 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1588 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1589 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1590 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1591 Contributed by H.J. Lu.
1593 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1594 Implemented by Ulrich Drepper.
1596 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1598 Contributed by H.J. Lu.
1600 * Support for fma instruction in AVX on x86-64.
1601 Implemented by H.J. Lu and Ulrich Drepper.
1603 * AVX support in x86-64 auditing support in ld.so.
1604 Implemented by H.J. Lu.
1606 * STB_GNU_UNIQUE support added.
1607 Implemented by Ulrich Drepper.
1609 * Implement second fallback mode for optimized DNS lookup for even more
1610 broken environments. If two requests from the same port are not
1611 handled correctly close the socket and open a new one before sending
1612 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1613 can be used to select this mode right away, instead of rediscovering the
1614 necessity is every process again.
1615 Implemented by Ulrich Drepper.
1617 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1618 Implemented by Adam Tkac.
1620 * Optimized iconv conversions for S390x.
1621 Implemented by Andreas Krebbel.
1623 * Using condvars with PI mutexes is now more efficient due to kernel
1624 support for requeueing to PI futexes. NPTL support added for x86-64.
1625 Implemented by Ulrich Drepper.
1627 * New locales: ps_AF, my_MM
1631 * The following bugs are resolved with this release:
1633 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1634 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1635 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1636 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1637 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1639 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1640 Implemented by Ulrich Drepper.
1642 * New Linux interfaces: accept4, fallocate, fallocate64.
1643 Implemented by Ulrich Drepper.
1645 * Correct declarations of string function when used in C++ code. This
1646 could lead to compile errors for invalid C++ code.
1648 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1651 * New POSIX 2008 interface: psiginfo
1652 Implemented by Ulrich Drepper.
1654 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1655 Implemented by Ulrich Drepper.
1657 * Support for selecting between multiple function definitions at runtime
1658 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1660 * The libcrypt library can now use the hash function implementations in
1661 NSS. Implemented by Ulrich Drepper.
1663 * The malloc implementation can be compiled to be less memory efficient
1664 but higher performing in multi-threaded programs.
1665 Implemented by Ulrich Drepper.
1667 * New locales: nan_TW@latin, ks_IN
1669 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1670 Implemented by Ulrich Drepper.
1672 * Extended printf hook support. It is possible to use user-defined types
1673 and extend existing format specifiers.
1674 Implemented by Ulrich Drepper.
1676 * Handling for group shadow files has been added.
1677 Implemented by Ulrich Drepper.
1679 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1680 servers (the case, e.g., for some people using the built-in DNS
1681 server in ADSL modems/routers). There is a once-per-process timeout
1682 in case of a broken server. To avoid it, users can run nscd or put
1683 'options single-request' in /etc/resolv.conf.
1684 Implemented by Ulrich Drepper.
1688 * The following bugs are resolved with this release:
1690 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1691 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1692 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1693 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1694 6968, 6974, 6980, 6995, 7008, 7009, 7029
1696 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1697 up at the same time. Implemented by Ulrich Drepper.
1699 * TLS descriptors for LD and GD on x86 and x86-64.
1700 Implemented by Alexandre Oliva.
1702 * getaddrinfo now handles DCCP and UDPlite.
1703 Implemented by Ulrich Drepper.
1705 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1706 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1707 Implemented by Ulrich Drepper.
1709 * New implementation of memmem, strstr, and strcasestr which is O(n).
1710 Implemented by Eric Blake.
1712 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1714 * Implement "e" option for popen to open file descriptor with the
1715 close-on-exec flag set. Implemented by Ulrich Drepper.
1717 * Implement "b" mode for fmemopen. In this mode writes writes don't
1718 implicitly add a NUL byte and seeks from the end of the buffer really
1719 use the buffer end, not the string length as the basis.
1720 Implemented by Ulrich Drepper.
1722 * Many functions, exported and internal, now atomically set the close-on-exec
1723 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1725 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1727 Implemented by Pravin Satpute.
1729 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1733 * The following bugs are resolved with this release:
1735 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1736 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1737 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1738 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1739 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1740 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1741 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1743 * New locales: bo_CN, bo_IN, shs_CA.
1745 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1747 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1748 Implemented by Pravin Satpute.
1750 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1752 * nscd caches now all timeouts for DNS entries
1753 Implemented by Ulrich Drepper.
1755 * nscd is more efficient and wakes up less often.
1756 Implemented by Ulrich Drepper.
1758 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1759 vdprintf, and obstack_vprintf.
1760 Implemented by Jakub Jelinek.
1762 * Faster memset for x86-64.
1763 Implemented by Harsha Jagasia and H.J. Lu.
1765 * Faster memcpy on x86.
1766 Implemented by Ulrich Drepper.
1768 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1769 Implemented by Ulrich Drepper.
1771 * Faster sqrt and sqrtf implemention for some PPC variants.
1772 Implemented by Steven Munroe.
1776 * The following bugs are resolved with this release:
1778 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1779 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1780 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1781 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1782 5071, 5103, 5104, 5112, 5113, 5184, 5186
1784 * More checking functions: fread, fread_unlocked, open*, mq_open.
1785 Implemented by Jakub Jelinek and Ulrich Drepper.
1787 * Extend fortification to C++. Implemented by Jakub Jelinek.
1789 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1790 by not recognizing 'a' as a modifier when those specs are requested.
1791 Implemented by Jakub Jelinek.
1793 * PPC optimizations to math and string functions.
1794 Implemented by Steven Munroe.
1796 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1797 options to be passed. Implemented by Ulrich Drepper.
1799 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1801 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1802 Implemented by Ulrich Drepper.
1804 * Handle private futexes in the NPTL implementation.
1805 Implemented by Jakub Jelinek and Ulrich Drepper.
1807 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1808 Implemented by Roland McGrath and Ulrich Drepper.
1810 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1812 * SHA-256 and SHA-512 based password encryption.
1813 Implemented by Ulrich Drepper.
1815 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1816 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1819 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1820 Implemented by Ulrich Drepper.
1824 * The following bugs are resolved with this release:
1826 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1827 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1828 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1829 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1830 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1831 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1832 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1835 * New Linux interfaces: epoll_pwait, sched_getcpu.
1837 * New generic interfaces: strerror_l.
1839 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1843 * The following bugs are resolved with this release:
1845 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1846 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1847 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1848 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1849 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1850 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1851 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1852 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1853 3225, 3251, 3252, 3253, 3273
1855 * For Linux, the sorting of addresses returned by getaddrinfo now also
1856 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1857 Implemented by Ulrich Drepper.
1859 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1860 Implemented by Ulrich Drepper.
1862 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1864 * New iconv module for MIK. Contributed by Alexander Shopov.
1866 * For sites with broken group and/or passwd database, the auto-propagate
1867 option of nscd can prevent creating ID lookup entries from the results
1868 of a name lookup and vice versa. This usually is no problem but some
1869 site might have problems with the default behavior.
1870 Implemented by Ulrich Drepper.
1872 * Iterating over entire database in NIS can be slow. With the
1873 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1874 to trade time for memory. The entire database will be read at once.
1875 Implemented by Ulrich Drepper.
1877 * The interfaces introduced in RFC 3542 have been implemented by
1880 * Support for the new ELF hash table format was added by Ulrich Drepper.
1882 * Support for priority inheritance mutexes added by Jakub Jelinek and
1885 * Support for priority protected mutexes added by Jakub Jelinek.
1887 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1888 or_IN, csb_PL, fy_NL, sr_ME.
1892 * More overflow detection functions.
1894 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1895 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1897 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1898 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1899 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1900 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1901 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1902 by Masahide Washizawa.
1904 * It is now possible to install audit libraries for the dynamic linker using
1905 LD_AUDIT. Implemented by Ulrich Drepper.
1907 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1908 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1909 For a libc and libpthread that works well on Linux 2.4 kernels, we
1910 recommend using the stable 2.3 branch.
1912 * The new function open_wmemstream acts like open_memstream,
1913 but uses a wchar_t wide character buffer.
1915 * The new function ppoll is an improved version of poll, similar to pselect.
1917 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1918 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1919 renameat, unlinkat, linkat, symlinkat, readlinkat.
1921 * New Linux kernel system calls: unshare,
1922 inotify_init, inotify_add_watch, inotify_rm_watch.
1924 * The euidaccess function is now also known by the alias eaccess,
1925 for compatibility with some other systems.
1927 * Timezone data updated to 2006b version.
1931 * The following bugs are resolved with this release:
1933 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1934 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1935 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1936 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1937 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1938 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1940 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1942 * As of this release, GCC 4 can be used to compile the C Library.
1944 * Timezone data updated to 2005m version.
1948 * The following bugs are resolved with this release:
1950 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1951 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1952 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1953 777, 787, 821, 822, 823, 825
1955 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1959 * Support for RFC 3678. Real implementations exist only for Linux so far.
1960 Implemented by Ulrich Drepper.
1962 * nscd can now cache entries persistently. Expiring entries are reloaded.
1963 For speedups the cache can be shared in memory with client processes.
1964 Implemented by Ulrich Drepper.
1966 * nscd can now perform SELinux checks.
1967 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1969 * getaddrinfo queries are now cached. Canonical name lookup is performed
1971 Implemented by Ulrich Drepper.
1973 * The nothrow function attribute is used when headers are used by gcc when
1974 compiling C code. This can avoid significant amounts of exception
1977 * The malloc functions perform more error checking and are stricter when
1978 it comes to reacting on errors. The default action is to terminate
1979 the process after showing an error message. Implemented by Ulrich Drepper.
1981 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1982 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1984 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1985 namespaces using the new function dlmopen(). This feature is of course,
1986 like most other dynamic loading functionality, not available in statically
1987 linked applications. Implemented by Ulrich Drepper.
1989 * Low-overhead boundary checking variants of string and some stdio functions
1990 were added. These are to be used in conjunction with a gcc patch by
1991 Jakub Jelinek which adds calls to these functions if possible.
1992 Implemented by Jakub Jelinek and Ulrich Drepper.
1994 * Old code for several operating systems and machine architectures that
1995 have not been in working condition in a long time have been removed from
1996 the main source tree maintained by the GNU C Library's maintainers.
1997 These files are now reside in the separate `ports' source module
1998 that is usable as an add-on when building the library.
2002 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2003 interrogate the dynamic linker, compatible with the Solaris interface.
2005 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2006 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2008 * getifaddrs now uses the netlink interface on Linux to get its information.
2009 Implemented by Thorsten Kukuk.
2011 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2012 Implemented by Ulrich Drepper.
2014 * support for non-executable stacks on x86 has been added. Changes mostly
2017 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2020 * getaddrinfo now performs destination address selection according to
2025 * Thread-safe interfaces for many functions that access locale data
2026 were added in version 2.3, but these features were omitted from NEWS.
2027 Many functions have variants with an `_l' suffix that take a `locale_t'
2028 object as a parameter rather than consulting the current locale.
2029 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2030 create and maintain `locale_t' objects. Additionally, the new function
2031 `uselocale' sets "the current locale" (as used by functions not so
2032 parameterized) set for an individual thread. These features were added
2033 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2035 * The functions getresuid, getresgid, setresuid, and setresgid, which
2036 have long been available on Linux, are now declared in <unistd.h>
2037 and are now also available on the Hurd.
2039 * ELF thread-local storage support (TLS) now works on x86-64.
2041 * The new dynamic string token $LIB is expanded in shared library names.
2042 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2044 * Aldy Hernandez contributed complete software floating point support for
2045 PowerPC machines with no FPU.
2047 * fexecve is implemented on Linux.
2049 * The `btowc' function should work at least twice as fast due to
2050 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2052 * With approriate thread add-ons cancelable functions are now implemented
2053 in libc.so as well. No need to call the function in libpthread. This
2054 change allowed to finally disable the incorrect and expensive handling
2055 of weak definition in ld.so.
2057 * Yet more PLT entries in libc.so have been removed. We finally arrived
2058 at the bare minimum. Startup times improved appropriately.
2060 * Support for the new Linux/x86 system call interface was added. The
2061 AT_SYSINFO auxiliary vector entry is recognized and handled.
2065 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2068 * iconv (the program and the interface) now accepts empty names (excluding
2069 options like //TRANSLIT) to mean "use charset of current locale".
2071 * localedef can now transliterate characters in strings which are not in
2072 the provided charmap. The information from the input locale is used.
2074 * Prelinking support was added for ELF targets. This requires additional
2075 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2077 * Read-only stdio streams now use mmap to speed up operation by eliminating
2078 copying and buffer underflows. To use add 'm' to the mode string of
2079 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2081 * The malloc functions were completely rewritten by Wolfram Gloger based
2082 on Doug Lea's malloc-2.7.0.c.
2084 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2085 implementation of regex.
2087 * Bruno Haible upgraded the iconv and locale implementation to support
2090 * Contents of the LC_* and LANG environment variables in the CEN style are
2091 not recognized anymore. It never was used. Change by Ulrich Drepper.
2093 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2094 thread-local storage (TLS) ABI on some platforms.
2095 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2097 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2098 EUC-JISX0213, and TSCII.
2100 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2101 BSD-compatible interface for getting all network interface addresses.
2102 Implementation for IPv4 by Roland McGrath.
2104 * Loading of locale data is faster due to the introduction of a locale
2105 archive. Implemented by Roland McGrath and Ulrich Drepper.
2107 * Startup times are significantly reduced by not using exported functions
2108 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2111 * Steven Munroe contributed a port to PowerPC64/Linux.
2115 * The Hurd now uses the GNU libio implementation of stdio rather than the
2116 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2118 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2119 with the same behavior as the Linux system call of the same name.
2123 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2124 128-bit long double format.
2126 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2127 IBM1161, and IBM1162 charsets.
2129 * Andreas Jaeger contributed a port to x86-64/Linux.
2131 * Peter Bruin contributed a port to PowerPC/Hurd.
2133 * libc functions using I/O streams now can handle wide-oriented streams
2136 * optimizations in the dynamic linker. Binaries created by recent binutils
2137 versions start up quicker due to reduced time spent on relocations.
2139 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2143 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2144 asinh, atanh, j0 for the 128-bit long double format.
2146 * Bruno Haible updated all the code handling Unicode in some form to
2147 support Unicode 3.1.
2149 * Speed of regex for single-byte locales is back to previous levels.
2150 Patch by Isamu Hasegawa.
2152 * Alpha, SPARC, and IA-64 now also using floating stacks.
2154 * Startup time of internationalized applications greatly improved through
2155 iconv cache. Use iconvconfig to generate the cache file.
2156 Contributed by Ulrich Drepper.
2158 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2159 severe performance problems. Patch by David Mosberger.
2161 * The Hurd port got a lot more functionality like AIO, various stdio
2162 extensions, etc. Mainly done by Roland McGrath.
2164 * mtrace can now lookup symbols in shared libraries.
2168 * Intel's IA-64 math library is largely integrated. It provides fast and
2169 accurate implementatations for most basic and standard math functions
2170 in float, double, and long double format.
2172 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2173 and asin for the 96-bit long double format and asin, log, tan for the
2174 128-bit long double format.
2176 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2177 The basic double functions exist today. Contributed by Abraham Ziv
2178 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2179 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2181 * An asynchronous name lookup library was added. The interface is designed
2182 after POSIX AIO. The proposal was circulated beforehand to get comments.
2183 No negative ones came in. Implemented by Ulrich Drepper.
2185 * Port to S390/64bit contributed by Martin Schwidefsky
2186 <schwidefsky@de.ibm.com>.
2188 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2189 of functions for Linux/IA-64.
2191 * The RPC code is now thread safe. Threads can now use the same service
2192 of different services at the same time. Patch by Eric Norum
2193 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2195 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2196 family of functions for Linux/S390.
2198 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2199 of functions for Linux/x86.
2201 * Port to Linux/CRIS contributed by Axis Communications.
2205 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2206 we can now check for namespace violations and missing declarations. The
2207 result is that almost all headers are now Unix-compliant (as defined in
2208 the upcoming XPG6). The negative side is that some programs might need
2209 corrections, too, if they depend on the incorrect form of the headers in
2210 previous versions which defined too many symbols and included too many
2213 * regex now handles multibyte character sets correctly.
2214 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2216 * iconv (the program) does now conform to the upcoming XPG6 and handles
2217 charmaps. Instead of the charset names the path of charmaps can be
2218 provided and the conversion happens based on this data.
2219 Contributed by Ulrich Drepper.
2221 * The locale program now provides detailed information about the installed
2226 only lists the names of the supported locales
2230 provides details such as country, language, and codeset name.
2231 Contributed by Ulrich Drepper.
2235 * The gencat program now parses the input file according to the charset
2236 selected by the LC_CTYPE category. This is important for stateful
2237 character sets. To make generating catalogs easier there is a way
2238 to overwrite the charset selected by the locale: before the first
2239 message or $ quote line the catalog can contain a line like
2241 $ codeset=ISO-8859-2
2243 to select the charset (ISO-8859-2 in this case).
2245 Implemented by Shinya Hanataka and Ulrich Drepper.
2247 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2248 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2249 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2251 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2252 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2254 * The LANGUAGE environment variable is now ignored unless the locale is
2255 changed from the default "C" locale.
2257 * The usual bug fixes.
2261 * Greg McGary added runtime support for bounds checking using gcc's
2262 new -fbounded-pointers option. ix86 target is complete. PowerPC
2265 * Thorsten Kukuk added secure mode support to nscd.
2267 * The Berkeley db libraries have been removed.
2269 Related, the nss_db module is now in a separate package since it
2270 obviously requires a database library being available.
2272 * Wide character I/O streams implemented by Ulrich Drepper.
2274 * Functions from the extended socket API added by Ulrich Drepper.
2276 * Functions feenableexcept and fedisableexcept to control the
2277 behaviour of individual exceptions have been added by Andreas Jaeger.
2279 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2281 * The resolver code has been updated from bind 8.2.3-T5B which supports
2282 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2285 This change could in some situations effect backward compatibility. Since
2286 now `_res' is a thread-local instead of a global variable, modifying it
2287 in one thread does not have any effect in other threads.
2289 The resolver library was also extended to allow IPv6 as the transport
2290 protocol for the requests. This work was done by Stig Venaas.
2292 * Compatibility code for K&R C compilers has been removed from the
2293 header files. A ISO C compiler is needed to use the library
2294 (conforming to either C89 or C99 standard).
2296 * Complete rewrite of the localedef program to support multibyte character
2297 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2298 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2299 Implemented by Ulrich Drepper.
2301 Bruno Haible significantly improved the generation and use of the data
2302 structures for the wide character tables.
2304 * Plural handling in gettext implemented by Ulrich Drepper.
2306 * The utmp daemon has been removed.
2308 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2310 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2313 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2315 * POSIX barriers implemented by Kaz Kylheku.
2317 * POSIX spawn function family implemented by Ulrich Drepper.
2319 * POSIX spinlocks are now available.
2321 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2323 * the configure option --enable-kernel=X.Y.Z allows to strip out
2324 compatibility for kernel versions before X.Y.Z. This is currently only
2325 implemented for Linux.
2327 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2328 field sin6_scope_id. This means that all programs using IPv6 should be
2329 recompiled. Don't expect binary compatibility with previous glibc
2332 * various conversion modules for IBM character sets contributed by
2335 * IA-64 port by Jes Sorensen and HJ Lu.
2349 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2351 * New xdr functions are added; some rpc functions are now 64bit clean.
2353 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2355 * Fixed known incompatibilities with glibc 2.0.
2357 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2359 * Optimized a number of functions (especially the ELF dynamic loader).
2361 * Update timezone data files.
2363 * lots of charmaps corrections
2365 * some new locale definitions and charmaps
2370 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2371 conform to POSIX member type requirements. Symbol versions have been
2372 adjusted as needed within the library, and for direct use by applications,
2373 but there is potential for problems if third-party libraries use
2374 struct timeval as part of their interface. This does not present
2375 a problem for X and other "essential" system libraries.
2377 * An additional locale model to support C++ Standard Library locale
2378 model and probably more was implemented by Ulrich Drepper.
2380 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2383 * Miles Bader provided the `argp' function family to support hierachical
2384 command line argument parsing, layered on top of getopt.
2386 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2388 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2391 * scanf recognizes the %a and %A format for scanning floating point numbers.
2393 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2394 information and interfaces for the available integer types.
2396 * about 130 new math functions were added to implement the ISO C9x math
2399 * the new header <complex.h> contains definitions of the complex math
2400 functions from ISO C 9X.
2402 * the new header <tgmath.h> defines generic macros to use complex or
2403 real valued functions.
2405 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2407 * Andreas Jaeger provided a test suite for the math library.
2409 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2411 * Ulrich Drepper added character set conversion functions (iconv).
2413 * Optimized string functions have been added.
2415 * The localedata addon is now part of glibc.
2417 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2419 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2420 daemon for NSS (nscd).
2422 Missing a better place here are some numbers on improvements. Under
2423 Linux 2.1.125 un-tar-ing the kernel sources takes
2427 using local files 12.19s 6.88s 22.91s
2429 using NIS 13.92s 8.91s 26.34s
2431 using NIS & nscd 10.37s 7.34s 25.30s
2433 using NIS+ 27.57s 30.37s 640.46s
2435 using NIS+ & nscd 10.25s 7.83s 26.51s
2437 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2439 Keep in mind that non-namelookup related operations dominate above times.
2440 It was just a common complain that using NIS+ unpacking the kernel is
2443 [1] The old nscd implementation is not available anymore since it was
2444 distributed with glibc up to version 2.0.98 and thus is now replaced.
2446 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2448 * Mark Kettenis provided a Hesiod NSS module.
2450 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2451 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2453 * rcmd can now handle netgroups (Dick Streefland).
2455 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2458 * Support for the IPv6 protocol has been added to the socket API, as per the
2459 latest draft standards.
2461 * Support for Linux 2.2 has been added.
2463 * Interface changes relative to the latest 2.0.x release:
2464 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2465 addseverity NEW: Unix98
2466 alphasort64 NEW: LFS
2467 argp_err_exit_status NEW: argp, GNU ext
2468 argp_error NEW: argp, GNU ext
2469 argp_failure NEW: argp, GNU ext
2470 argp_help NEW: argp, GNU ext
2471 argp_parse NEW: argp, GNU ext
2472 argp_program_bug_address NEW: argp, GNU ext
2473 argp_program_version NEW: argp, GNU ext
2474 argp_program_version_hook NEW: argp, GNU ext
2475 argp_state_help NEW: argp, GNU ext
2476 argp_usage NEW: argp, GNU ext
2477 authdes_create NEW: Secure RPC
2478 authdes_getucred NEW: Secure RPC
2479 authdes_pk_create NEW: Secure RPC
2480 backtrace NEW: GNU ext.
2481 backtrace_symbols NEW: GNU ext.
2482 backtrace_symbols_fd NEW: GNU ext.
2484 cacosf NEW: ISO C 9x
2485 cacosh NEW: ISO C 9x
2486 cacoshf NEW: ISO C 9x
2487 cacoshl NEW: ISO C 9x
2488 cacosl NEW: ISO C 9x
2495 casinf NEW: ISO C 9x
2496 casinh NEW: ISO C 9x
2497 casinhf NEW: ISO C 9x
2498 casinhl NEW: ISO C 9x
2499 casinl NEW: ISO C 9x
2501 catanf NEW: ISO C 9x
2502 catanh NEW: ISO C 9x
2503 catanhf NEW: ISO C 9x
2504 catanhl NEW: ISO C 9x
2505 catanl NEW: ISO C 9x
2506 cbc_crypt NEW: Secure RPC
2510 ccoshf NEW: ISO C 9x
2511 ccoshl NEW: ISO C 9x
2517 cimagf NEW: ISO C 9x
2518 cimagl NEW: ISO C 9x
2519 clearerr_locked REMOVED
2520 clntunix_create NEW: sunrpc ext
2522 clog10 NEW: ISO C 9x
2523 clog10f NEW: ISO C 9x
2524 clog10l NEW: ISO C 9x
2534 cprojf NEW: ISO C 9x
2535 cprojl NEW: ISO C 9x
2537 crealf NEW: ISO C 9x
2538 creall NEW: ISO C 9x
2543 csinhf NEW: ISO C 9x
2544 csinhl NEW: ISO C 9x
2547 csqrtf NEW: ISO C 9x
2548 csqrtl NEW: ISO C 9x
2552 ctanhf NEW: ISO C 9x
2553 ctanhl NEW: ISO C 9x
2555 des_setparity NEW: Secure RPC
2556 ecb_crypt NEW: Secure RPC
2557 endutxent NEW: Unix98
2559 exp10f NEW: ISO C 9x
2560 exp10l NEW: ISO C 9x
2564 fattach NEW: STREAMS
2565 fdetach NEW: STREAMS
2569 feclearexcept NEW: ISO C 9x
2570 fegetenv NEW: ISO C 9x
2571 fegetexceptflag NEW: ISO C 9x
2572 fegetround NEW: ISO C 9x
2573 feholdexcept NEW: ISO C 9x
2575 feraiseexcept NEW: ISO C 9x
2576 ferror_locked REMOVED
2577 fesetenv NEW: ISO C 9x
2578 fesetexceptflag NEW: ISO C 9x
2579 fesetround NEW: ISO C 9x
2580 fetestexcept NEW: ISO C 9x
2581 feupdateenv NEW: ISO C 9x
2582 fflush_locked REMOVED
2586 fgets_unlocked NEW: GNU ext.
2587 fileno_locked REMOVED
2599 fputc_locked REMOVED
2600 fputs_unlocked NEW: GNU ext.
2601 fread_unlocked NEW: GNU ext.
2606 fstatvfs NEW: Unix98
2610 ftruncate64 NEW: LFS
2612 fwrite_unlocked NEW: GNU ext.
2613 gai_strerror NEW: IPv6
2617 getchar_locked REMOVED
2619 getdate_err NEW: Unix98
2620 getdate_r NEW: GNU ext.
2622 getnameinfo NEW: IPv6
2623 getnetname NEW: Secure RPC
2624 getpmsg NEW: STREAMS
2625 getpt NEW: Unix98 PTY
2626 getrlimit64 NEW: LFS
2627 getutxent NEW: Unix98
2628 getutxid NEW: Unix98
2629 getutxline NEW: Unix98
2630 glob64 NEW: GNU ext.
2631 globfree64 NEW: GNU ext.
2632 gnu_get_libc_release NEW: GNU ext.
2633 gnu_get_libc_version NEW: GNU ext.
2634 grantpt NEW: Unix98 PTY
2635 host2netname NEW: Secure RPC
2637 iconv_close NEW: iconv
2638 iconv_open NEW: iconv
2639 if_freenameindex NEW: IPv6
2640 if_indextoname NEW: IPv6
2641 if_nameindex NEW: IPv6
2642 if_nametoindex NEW: IPv6
2643 in6addr_any NEW: IPv6
2644 in6addr_loopback NEW: IPv6
2645 inet6_isipv4mapped NEW: IPv6
2646 isastream NEW: STREAMS
2647 iswblank NEW: GNU ext.
2648 key_decryptsession NEW: Secure RPC
2649 key_decryptsession_pk NEW: Secure RPC
2650 key_encryptsession NEW: Secure RPC
2651 key_encryptsession_pk NEW: Secure RPC
2652 key_gendes NEW: Secure RPC
2653 key_get_conv NEW: Secure RPC
2654 key_secretkey_is_set NEW: Secure RPC
2655 key_setnet NEW: Secure RPC
2656 key_setsecret NEW: Secure RPC
2657 llrint NEW: ISO C 9x
2658 llrintf NEW: ISO C 9x
2659 llrintl NEW: ISO C 9x
2660 llround NEW: ISO C 9x
2661 llroundf NEW: ISO C 9x
2662 llroundl NEW: ISO C 9x
2667 lrintf NEW: ISO C 9x
2668 lrintl NEW: ISO C 9x
2669 lround NEW: ISO C 9x
2670 lroundf NEW: ISO C 9x
2671 lroundl NEW: ISO C 9x
2673 makecontext NEW: Unix98
2674 mempcpy NEW: GNU ext.
2677 modify_ldt NEW: kernel
2681 nearbyint NEW: ISO C 9x
2682 nearbyintf NEW: ISO C 9x
2683 nearbyintl NEW: ISO C 9x
2684 netname2host NEW: Secure RPC
2685 netname2user NEW: Secure RPC
2686 nexttoward NEW: ISO C 9x
2687 nexttowardf NEW: ISO C 9x
2688 nexttowardl NEW: ISO C 9x
2692 passwd2des NEW: Secure RPC
2694 pow10f NEW: GNU ext.
2695 pow10l NEW: GNU ext.
2698 printf_size NEW: GNU ext.
2699 printf_size_info NEW: GNU ext.
2700 profil_counter REMOVED
2701 pthread_mutexattr_getkind_np REPLACED
2702 pthread_mutexattr_setkind_np REPLACED
2703 ptsname NEW: Unix98 PTY
2704 ptsname_r NEW: Unix98 PTY
2706 putchar_locked REMOVED
2707 putgrent NEW: GNU ext.
2709 putpmsg NEW: STREAMS
2710 pututxline NEW: Unix98
2714 readdir64_r NEW: LFS
2715 remquo NEW: ISO C 9x
2716 remquof NEW: ISO C 9x
2717 remquol NEW: ISO C 9x
2719 roundf NEW: ISO C 9x
2720 roundl NEW: ISO C 9x
2722 scalbln NEW: ISO C 9x
2723 scalblnf NEW: ISO C 9x
2724 scalblnl NEW: ISO C 9x
2726 sendfile NEW: kernel
2727 setcontext NEW: Unix98
2728 setrlimit64 NEW: LFS
2729 setutxent NEW: Unix98
2731 sigignore NEW: Unix98
2732 sigqueue NEW: POSIX.1b
2733 sigrelse NEW: Unix98
2734 sigset NEW: POSIX.1b
2735 sigtimedwait NEW: POSIX.1b
2736 sigwaitinfo NEW: POSIX.1b
2737 sincos NEW: GNU ext.
2738 sincosf NEW: GNU ext.
2739 sincosl NEW: GNU ext.
2743 strcasestr NEW: GNU ext.
2744 strtoimax NEW: ISO C 9x
2745 strtoumax NEW: ISO C 9x
2746 strverscmp NEW: GNU ext.
2747 svcauthdes_stats NEW: Secure RPC
2748 svcunix_create NEW: sunrpc etx
2749 svcunixfd_create NEW: sunrpc ext
2750 swapcontext NEW: Unix98
2751 tcgetsid NEW: Unix98 PTY
2752 tdestroy NEW: GNU ext.
2753 tgamma NEW: ISO C 9x
2754 tgammaf NEW: ISO C 9x
2755 tgammal NEW: ISO C 9x
2759 truncf NEW: ISO C 9x
2760 truncl NEW: ISO C 9x
2762 unlockpt NEW: Unix98 PTY
2763 updwtmpx NEW: Unix98
2764 user2netname NEW: Secure RPC
2765 utmpxname NEW: Unix98
2766 versionsort NEW: GNU ext.
2767 versionsort64 NEW: GNU ext.
2769 wcscasecmp NEW: GNU ext.
2770 wcsncasecmp NEW: GNU ext.
2771 wcsnlen NEW: GNU ext.
2772 wcstoimax NEW: ISO C 9x
2773 wcstoll NEW: ISO C 9x
2774 wcstoull NEW: ISO C 9x
2775 wcstoumax NEW: ISO C 9x
2777 wordexp NEW: POSIX.2
2778 wordfree NEW: POSIX.2
2779 write_profiling REMOVED
2780 xdecrypt NEW: Secure RPC
2781 xdr_authdes_cred NEW: Secure RPC
2782 xdr_authdes_verf NEW: Secure RPC
2783 xdr_cryptkeyarg NEW: Secure RPC
2784 xdr_cryptkeyarg2 NEW: Secure RPC
2785 xdr_cryptkeyres NEW: Secure RPC
2786 xdr_getcredres NEW: Secure RPC
2787 xdr_key_netstarg NEW: Secure RPC
2788 xdr_key_netstres NEW: Secure RPC
2789 xdr_keybuf NEW: Secure RPC
2790 xdr_keystatus NEW: Secure RPC
2791 xdr_netnamestr NEW: Secure RPC
2792 xdr_sizeof NEW: Secure RPC
2793 xdr_unixcred NEW: sunrpc ext
2794 xencrypt NEW: Secure RPC
2795 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2806 * inet_ntoa is thread-safe
2808 * updwtmp is moved from libutil to libc
2810 * rewrite of cbrt function
2812 * update of timezone data
2826 * add atoll function
2828 * fix complex problems in Berkeley DB code
2830 * fix math functions
2834 * fixed lots of header problems (especially Linux/GNU specific)
2836 * dynamic loader preserves all registers
2838 * Roland McGrath provided support for handling of auxiliary objects in
2839 the ELF dynamic loader.
2841 * support for parallel builds is improved
2845 * GNU extensions are no longer declared by default. To enable them you
2846 must define the macro `_GNU_SOURCE' in your program or compile with
2849 * The library has changed from using GNU ld symbol aliases to using weak
2850 symbols where available. The ELF object file format supports weak
2851 symbols; GNU ld also supports weak symbols in the a.out format. (There
2852 is also now support for other GNU ld extensions in ELF. Use the
2853 `--with-elf' option to configure to indicate you have ELF, and
2854 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2855 of many files which contained only symbol aliases, reducing the size of
2856 the source and the compiled library; many other files were renamed to
2857 less cryptic names previously occupied by the symbol alias files.
2858 There is a new header file <elf.h> for programs which operate on
2859 files in the ELF format.
2861 * Converted to Autoconf version 2, so `configure' has more options.
2862 Run `configure --help' to see the details.
2864 * The library can now be configured to build profiling, highly-optimized
2865 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2866 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2867 `configure' enable building these extra libraries. The shared library is
2868 built by default when using both ELF and GNU ld. When shared libraries
2869 are enabled, the new library `-ldl' is available for arbitrary run-time
2870 loading of shared objects; its interface is defined in <dlfcn.h>. The
2871 new header file <link.h> gives access to the internals of the run-time
2872 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2873 application of same name on other systems and it provides information
2874 about dynamically linked binaries.
2876 * The C library now provides the run-time support code for profiling
2877 executables compiled with `-pg'. Programs can control the profiling code
2878 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2879 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2880 the support for this file format was contributed by David Mosberger-Tang.
2882 * The math code has been replaced with a math library based on fdlibm from
2883 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2884 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2885 functions. The math functions now reside in a separate library, so
2886 programs using them will need to use `-lm' their linking commands.
2888 * John C. Bowman contributed optimized ix87 assembler inline functions.
2890 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2891 mechanism similar to that found in Solaris 2. This is now used for the
2892 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2893 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2894 file controls what services are used for each individual database. This
2895 works by loading shared libraries with names specified in `nsswitch.conf',
2896 so service modules can be changed or added at any time without even
2897 relinking any program. Currently there are the file, db, and NIS based
2898 NSS services available.
2900 * The new functions `strtoq' and `strtouq' parse integer values from
2901 strings, like `strtol' and `strtoul', but they return `long long int' and
2902 `unsigned long long int' values, respectively (64-bit quantities).
2904 * The new functions `strtof' and `strtold' parse floating-point values from
2905 strings, like `strtod', but they return `float' and `long double' values,
2906 respectively (on some machines `double' and `long double' are the same).
2908 * Ulrich Drepper has contributed new implementations of the floating-point
2909 printing and reading code used in the `printf' family of functions and
2910 `strtod', `strtof', and `strtold'. These new functions are perfectly
2911 accurate, and much faster than the old ones.
2913 * The implementation of the POSIX locale model was completely rewritten by
2914 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2915 to compile the POSIX locale definition.
2917 * The former dummy implementations of the strcoll and strxfrm function are
2918 now replaced by fully functional code contributed by Ulrich Drepper. The
2919 collation information comes from the POSIX locale definitions.
2921 * The new header <langinfo.h> defines an interface for accessing
2922 various locale-dependent data (using the locale chosen with `setlocale').
2924 * Ulrich Drepper has contributed a new suite of functions for operation on
2925 wide-character and multibyte-character strings, in <wchar.h>;
2926 and classification and case conversion of wide characters, in <wctype.h>.
2927 These new functions are conforming to the ISO C, Amendement 1 specification.
2929 * There is now a second implementation of the standard I/O library available.
2930 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2931 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2933 * You can now use positional parameter specifications in format strings
2934 for the `printf' and `scanf' families of functions. For example,
2935 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2936 ``Number 6, Mr Jones''. This is mainly useful when providing different
2937 format strings for different languages, whose grammars may dictate
2938 different orderings of the values being printed. To support this
2939 feature, the interface for `register_printf_handler' has changed; see
2940 the header file <printf.h> for details.
2942 * The `printf' and `scanf' families of functions now understand a new
2943 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2944 to group numbers as indicated by the locale; for `scanf' and friends, this
2945 says to accept as valid only a number with all the proper grouping
2946 separators in the right places. In the default "C" locale, numbers are
2947 not grouped; but locales for specific countries will define the usual
2948 conventions (i.e. separate thousands with `,' in the US locale).
2950 * The pgrp functions have been regularized, slightly incompatibly but much
2951 less confusingly. The core functions are now `getpgid' and `setpgid',
2952 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2953 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2954 provided for compatibility. There is no longer an incompatible `getpgrp'
2955 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2957 * The new header file <fts.h> and suite of functions simplify programs that
2958 operate on directory trees. This code comes from 4.4 BSD.
2960 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2961 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2962 NSS scheme used in glibc.
2964 * There is a new malloc debugging hook `__memalign_hook'.
2966 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2967 `unsigned int' in <sys/types.h>. These are for compatibility only and
2968 their use is discouraged.
2970 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2971 done differently, so that it works even without GNU ld.
2973 * New function `euidaccess' checks allowed access to a file like `access',
2974 but using the effective IDs instead of the real IDs.
2976 * The time zone data files have been updated for the latest and greatest
2977 local time conventions of the countries of the world.
2979 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2982 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2983 for formatting floating-point numbers. They are provided only for
2984 compatibility; new programs should use `sprintf' instead. There are
2985 also equivalent function for the `long double' floating-point type and
2986 all functions also exist in a reentrant form.
2988 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2989 functions for maintaining the login-record files (primarily of use to
2990 system programs such as `login'), and convenient functions for
2991 allocating and initializing a pseudo-terminal (pty) device.
2993 * Ulrich Drepper has contributed new support for System V style
2994 shared memory and IPC on systems that support it.
2996 * Ulrich Drepper has contributed several miscellaneous new functions found
2997 in System V: The `hsearch' family of functions provide an effective
2998 implementation of hash tables; `a64l' and `l64a' provide a very simple
2999 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3002 * Ulrich Drepper has contributed new reentrant counterparts for the
3003 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3005 * Ulrich Drepper has contributed new, highly-optimized versions of several
3006 string functions for the i486/Pentium family of processors.
3008 * Ulrich Drepper has updated the Linux-specific code, based largely
3009 on work done in Hongjiu Lu's version of GNU libc for Linux.
3010 The GNU library now supports Linux versions 2.0.10 and later,
3011 using the ELF object file format (i[3456]86-*-linux).
3013 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3015 * David Mosberger-Tang and Richard Henderson have ported the C library
3016 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3017 dynamic linking support for ELF/Alpha.
3019 * Richard Henderson contributed several Alpha optimized assembler function
3020 for arithmetic and string handling.
3022 * Ulrich Drepper has contributed a new set of message catalog functions to
3023 support multiple languages using the <libintl.h> interface, for use with
3024 his new package GNU gettext. Translation volunteers have contributed
3025 catalogs of the library's messages in Spanish, German, and Korean.
3027 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3028 program and the `catgets' function for reading the catalog files it
3029 creates. (The <libintl.h> interface is preferred; we include the
3030 <nl_types.h> interface using `catgets' only for source compatibility with
3031 programs already written to use it.)
3033 * New header file <values.h> gives SVID-compatible names for <limits.h>
3036 * Various new macros, declarations, and small header files for compatibility
3039 * New function `group_member' is a convenient way to check if a process has
3040 a given effective group ID.
3042 * When using GCC 2.7 and later, the socket functions are now declared in a
3043 special way so that passing an argument of type `struct sockaddr_in *',
3044 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3045 `struct sockaddr *' type, does not generate a type-clash warning.
3047 * New function `error' declared in header file <error.h> is a convenient
3048 function for printing error messages and optionally exiting; this is the
3049 canonical function used in GNU programs. The new functions `err', `warn',
3050 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3051 doing the same thing.
3053 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3054 POSIX.2 `glob' function to do ~ and {...} expansion.
3056 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3057 `clearenv' which is used in POSIX.9 is also available.
3059 * New function `getsid' returns session ID number on systems that support it.
3061 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3062 files <db.h> and <mpool.h> provide a rich set of functions for several
3063 types of simple databases stored in memory and in files, and <ndbm.h> is
3064 an old `ndbm'-compatible interface using the `db' functions. Link with
3065 `-ldb' to get these functions.
3067 * New macro `strdupa' copies a string like `strdup', but uses local stack
3068 space from `alloca' instead of dynamic heap space from `malloc'.
3070 * New function `strnlen' is like `strlen' but searches only a given maximum
3071 number of characters for the null terminator. `stpncpy', `strndup' and
3072 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3075 * New function `statfs' in header <sys/statfs.h>.
3077 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3078 provide convenient functions for operating on blocks of null-terminated
3081 * A new suite of functions in <utmp.h> handle all the details of reading
3082 and writing the utmp file.
3084 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3087 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3088 completely POSIX compliant and also implemented the extended functionality
3089 to handle alternate digit representation and alternate era date formats.
3091 * Ulrich Drepper provided an implementation of the `strptime' function
3092 defined in XPG4.2 which transforms a string into a `struct tm' value.
3094 * Paul Eggert provided the tzselect shell script as part of the timezone
3095 code. The shell script makes it easy to select the correct timezone
3098 * The implementation of the malloc family of functions is completely replaced
3099 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3100 The implementation uses the mmap function (if available) and it is
3101 optimized for the use in multi threaded programs.
3103 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3104 functions. This new functionality is usable by specifying a special
3105 salt string and it is compatible with implementation on *BSD systems.
3107 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3108 `getsubopt' to handle second level command line options, `bsd_signal'
3109 to access BSD style `signal' functionality, the obsolete `regexp' style
3112 * the `lchown' function is available on system which support this
3115 * The implementation of the shadow password handling function was contributed
3118 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3120 * POSIX.1g support was added. The <sys/select.h> header is available,
3121 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3122 implementation of `getaddrinfo'.
3126 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3128 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3129 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3131 * The new function `daemon' from 4.4 BSD is useful for server programs that
3132 want to put themselves in the background.
3134 * Joel Sherrill has contributed support for several standalone boards that
3135 run without an operating system.
3137 * `printf', `scanf' and friends now accept a `q' type modifier for long
3138 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3140 * All of the code taken from BSD (notably most of the math and networking
3141 routines) has been updated from the BSD 4.4-Lite release.
3143 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3145 * The new functions `getdomainname' and `setdomainname' fetch or change the
3146 YP/NIS domain name. These are system calls which exist on systems which
3149 * The time zone data files have been updated for the latest international
3152 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3153 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3157 * The C library now includes support for Sun RPC, from Sun's free
3158 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3159 are included. (There is still no support for YP.)
3161 * Tom Quinn has contributed a port of the C library to SGI machines running
3162 Irix 4 (mips-sgi-irix4).
3164 * The new `lockf' function is a simplified interface to the locking
3165 facilities of `fcntl', included for compatibility.
3167 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3169 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3171 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3174 * The error message printed by `assert' for a failed assertion now includes
3175 the name of the program (if using GNU ld) and the name of the calling
3176 function (with versions of GCC that support this).
3178 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3180 * The library now includes the <sys/mman.h> header file and memory
3181 management functions `mmap', `munmap', `mprotect', `msync', and
3182 `madvise', on systems that support those facilities.
3184 * The interface for `mcheck' has changed slightly: the function called to
3185 abort the program when an allocation inconsistency is detected now takes
3186 an argument that indicates the type of failure. The new function
3187 `mprobe' lets you request a consistency check for a particular block at
3188 any time (checks are normally done only when you call `free' or `realloc'
3191 * It is now possible to easily cross-compile the C library, building on one
3192 system a library to run on another machine and/or operating system. All
3193 you need to do is set the variable `HOST_CC' in `configparms' to the
3194 native compiler for programs to run on the machine you are building on (a
3195 few generator programs are used on Unix systems); set `CC' to the
3198 * The new function `fexecve' (only implemented on the GNU system) executes
3199 a program file given a file descriptor already open on the file.
3203 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3204 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3206 * You can set the variable `libprefix' in `configparms' to specify a prefix
3207 to be prepended to installed library files; this makes it easy to install
3208 the GNU C library to be linked as `-lgnuc' or whatever.
3210 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3211 copies a limited number of characters from a string, and returns the
3212 address of the last character written.
3214 * You no longer need to check for whether the installed `stddef.h' is
3215 compatible with the GNU C library. configure now checks for you.
3217 * You can now define a per-stream `fileno' function to convert the
3218 stream's cookie into an integral file descriptor.
3220 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3221 allocates zero bytes of storage, and returns a unique pointer which
3222 you can pass to `realloc' or `free'. The behavior is undefined if
3223 you dereference this pointer.
3225 * The C library now runs on Sony NEWS m68k machines running either
3226 NewsOS 3 or NewsOS 4.
3228 * The new `syscall' function is a system-dependent primitive function
3229 for invoking system calls. It has the canonical behavior on Unix
3230 systems, including unreliable return values for some calls (such as
3231 `pipe', `fork' and `getppid').
3233 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3234 to `EAGAIN', which is the preferred name. On systems whose kernels
3235 use two distinct codes, the C library now translates EWOULDBLOCK to
3236 EAGAIN in every system call function.
3240 * The GNU C Library Reference Manual is now distributed with the library.
3241 `make dvi' will produce a DVI file of the printed manual.
3242 `make info' will produce Info files that you can read on line using C-h i
3243 in Emacs or the `info' program.
3244 Please send comments on the manual to bug-glibc-manual@gnu.org.
3246 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3248 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3250 * Jason Merrill has contributed a port to the Sequent Symmetry running
3251 Dynix version 3 (i386-sequent-dynix).
3253 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3254 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3256 * New function `memory_warnings' lets you arrange to get warnings when
3257 malloc is running out of memory to allocate, like Emacs gives you.
3259 * The C library now contains the relocating allocator used in Emacs 19 for
3260 its editing buffers. This allocator (ralloc) minimizes allocation
3261 overhead and fragmentation by moving allocated regions around whenever it
3262 needs to. You always refer to a ralloc'd region with a "handle" (a
3263 pointer to a pointer--an object of type `void **').
3265 * There is a new `printf' format: `%m' gives you the string corresponding
3266 to the error code in `errno'.
3268 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3269 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3270 pass, the `a' modifier says to fill in a `char **' you pass with a
3273 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3274 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3275 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3277 * `mkstemp' is a traditional Unix function to atomically create and open a
3278 uniquely-named temporary file.
3282 * The standard location for the file that says what the local timezone is
3283 has changed again. It is now `/usr/local/etc/localtime' (or more
3284 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3286 * The distribution no longer contains any files with names longer than 14
3289 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3290 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3292 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3296 * The configuration process has changed quite a bit. The `configure'
3297 script is now used just like the configuration scripts for other GNU
3298 packages. The `sysdeps' directory hierarchy is much rearranged.
3299 The file `INSTALL' explains the new scheme in detail.
3301 * The header files no longer need to be processed into ANSI C and
3302 traditional C versions. There is just one set of files to install, and
3303 it will work with ANSI or old C compilers (including `gcc -traditional').
3305 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3306 MIPS DECStation running Ultrix 4.
3308 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3309 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3310 made itself into a shared library.
3312 * Yet further improved support for the i386, running 4.3 BSD-like systems
3313 (such as Mach 3 with the Unix single-server), or System V.
3315 * New function `strncasecmp' to do case-insensitive string comparison
3316 with limited length.
3318 * New function `strsep' is a reentrant alternative to `strtok'.
3320 * New functions `scandir' and `alphasort' for searching directories.
3322 * New function `setenv' is a better interface to `putenv'.
3324 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3325 function for traversing a directory tree.
3327 * The GNU obstack package is now also part of the C library.
3328 The new function `open_obstack_stream' creates a stdio stream that
3329 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3330 formatted output directly to an obstack.
3332 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3333 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3335 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3337 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3338 things to your strings.
3340 * There are some new test programs: test-fseek, testmb, and testrand.
3342 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3343 These ports are not finished, but are a good starting place for really
3344 supporting those systems.
3346 * `/etc/localtime' is now the standard location for the file that says what
3347 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3348 This follows the general principle that `/etc' is the place for all local
3349 configuration files.
3351 * The C library header files now use `extern "C"' when used by the C++
3352 compiler, so the C library should now work with C++ code.
3354 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3355 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3358 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3359 function which uses the `merge sort' algorithm, and is said to be
3360 significantly faster than the old GNU `qsort' function. Merge sort is
3361 now the standard `qsort' function. The new algorithm can require a lot
3362 of temporary storage; so, the old sorting function is called when the
3363 required storage is not available.
3365 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3366 provides the Unix `crypt' function, plus some other entry points.
3368 * The code and header files taken from 4.4 BSD have been updated with the
3369 latest files released from Berkeley.
3371 ----------------------------------------------------------------------
3372 Copyright information:
3374 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3376 Permission is granted to anyone to make or distribute verbatim copies
3377 of this document as received, in any medium, provided that the
3378 copyright notice and this permission notice are preserved,
3379 thus giving the recipient permission to redistribute in turn.
3381 Permission is granted to distribute modified versions
3382 of this document, or of portions of it,
3383 under the above conditions, provided also that they
3384 carry prominent notices stating who last changed them.
3387 version-control: never