1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * The fesetexcept function from TS 18661-1:2014 is added to libm.
37 Security related changes:
39 On ARM EABI (32-bit), generating a backtrace for execution contexts which
40 have been created with makecontext could fail to terminate due to a
41 missing .cantunwind annotation. This has been observed to lead to a hang
42 (denial of service) in some Go applications compiled with gccgo. Reported
43 by Andreas Schwab. (CVE-2016-6323)
45 The following bugs are resolved with this release:
47 [The release manager will add the list generated by
48 scripts/list-fixed-bugs.py just before the release.]
52 * The minimum Linux kernel version that this version of the GNU C Library
53 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
54 kernel version 2.6.32 or later suffices (on architectures that already
55 required kernel versions more recent than 3.2, those requirements remain
56 unchanged). Linux 3.2 or later kernel headers are required on all
59 * The pap_AN locale has been deleted. This has been deprecated for a long
60 time. It has been replaced by pap_AW & pap_CW, both of which have long
61 been included in previous releases.
63 * The readdir_r and readdir64_r functions have been deprecated. It is
64 recommended to use readdir and readdir64 instead.
66 * The type “union wait” has been removed. It was deprecated in the early
67 1990s and never part of POSIX. Application code should use the int type
68 instead of “union wait”.
70 * A new NSS action is added to facilitate large distributed system
71 administration. The action, MERGE, allows remote user stores like LDAP
72 to be merged into local user stores like /etc/groups in order to provide
73 easy to use, updated, and managed sets of merged credentials. The new
74 action can be used by configuring it in /etc/nsswitch.conf:
75 group: files [SUCCESS=merge] nis
76 Implemented by Stephen Gallagher (Red Hat).
78 * The deprecated __malloc_initialize_hook variable has been removed from the
81 * The long unused localedef --old-style option has been removed. It hasn't
82 done anything in over 16 years. Scripts using this option can safely
85 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
86 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
87 return the next representable value in the direction of positive infinity
88 and the nextdown functions return the next representable value in the
89 direction of negative infinity. These are currently enabled as GNU
92 Security related changes:
94 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
95 could result in a stack overflow when getnetbyname was called with an
96 overly long name. (CVE-2016-3075)
98 * Previously, getaddrinfo copied large amounts of address data to the stack,
99 even after the fix for CVE-2013-4458 has been applied, potentially
100 resulting in a stack overflow. getaddrinfo now uses a heap allocation
101 instead. Reported by Michael Petlan. (CVE-2016-3706)
103 * The glob function suffered from a stack-based buffer overflow when it was
104 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
105 Reported by Alexander Cherepanov. (CVE-2016-1234)
107 * The Sun RPC UDP client could exhaust all available stack space when
108 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
109 alloca plugin for GCC. (CVE-2016-4429)
111 * The IPv6 name server management code in libresolv could result in a memory
112 leak for each thread which is created, performs a failing naming lookup,
113 and exits. Over time, this could result in a denial of service due to
114 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
116 The following bugs are resolved with this release:
118 [1170] localedata: ne_NP: update Nepali locale definition file
119 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
121 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
122 [6796] math: fdim() does not set errno on overflow
123 [10354] libc: posix_spawn should use vfork() in more cases than presently
124 [11213] localedata: localedata: add copyright disclaimer to locale files
125 [12143] localedata: chr_US: new Cherokee locale
126 [12450] localedata: sgs_LT: new locale
127 [12676] localedata: ln_CD: new locale
128 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
130 [13304] math: fma, fmaf, fmal produce wrong results
131 [14259] build: --localedir arg to configure is ignored
132 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
133 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
134 [14934] localedata: es_CL: wrong first weekday chilean locale
135 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
137 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
139 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
140 [15368] nptl: raise() is not async-signal-safe
141 [15479] math: ceil, floor, round and trunc raise inexact exception
142 [15578] localedata: kk_KZ: various updates
143 [16003] localedata: pap_AN: punt old locale
144 [16137] localedata: iw_IL: punt old locale
145 [16190] localedata: eo: new esperanto locale
146 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
147 [16742] malloc: race condition: pthread_atfork() called before first
148 malloc() results in unexpected locking behaviour/deadlocks
149 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
151 [16983] localedata: postal_fmt does not allow %l and %n modifiers
152 [17565] localedata: pt_PT: wrong (work-)week start
153 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
154 [17950] build: Build fails with -msse
155 [18205] localedata: be_BY*: wrong first_weekday and first_workday
156 [18433] libc: posix_spawn does not return correctly upon failure to
158 [18453] localedata: charmaps/IBM875: incorrect codes
159 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
161 [18896] localedata: he_IL: improvements for currency
162 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
164 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
166 [19056] libc: Deprecate readdir_r
167 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
169 [19198] localedata: nl_NL: small improvements for Dutch locales
170 [19257] network: Per-thread memory leak in __res_vinit with IPv6
171 nameservers (CVE-2016-5417)
172 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
174 [19400] locale: Language missing in "iso-639.def", trivial fix in
176 [19431] malloc: Deadlock between fflush, getdelim, and fork
177 [19505] libc: Incorrect file descriptor validity checks in
178 posix_spawn_file_actions_add{open,close,dup2}
179 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
181 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
182 `intl/{gettextP,loadinfo}.h'
183 [19534] libc: execle, execlp may use malloc
184 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
185 [19573] network: res_nclose and __res_maybe_init disagree about name
186 server initialization, breaking Hesiod
187 [19575] localedata: Status of GB18030 tables
188 [19581] localedata: sr_* date_fmt string contains additional newline
189 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
191 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
192 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
193 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
194 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
196 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
198 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
200 [19610] dynamic-link: ldconfig -X removes stale symbolic links
201 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
202 [19633] locale: strfmon_l applies global locale to number formatting
203 [19642] network: Memory leak in getnameinfo
204 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
205 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
207 [19654] math: [x86_64] Need testcase for BZ #19590 fix
208 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
210 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
211 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
213 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
215 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
217 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
218 pointers and lengths in error-case.
219 [19727] locale: Converting from/to UTF-xx with iconv() does not always
220 report errors on UTF-16 surrogates values.
221 [19755] nscd: nscd assertion failure in gc
222 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
223 [19759] libc: mempcpy shouldn't be inlined
224 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
225 [19765] libc: s390 needs an optimized mempcpy
226 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
227 NAME_MAX limit assumption (CVE-2016-1234)
228 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
229 [19787] network: Missing and incorrect truncation checks in getnameinfo
230 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
232 [19791] network: Assertion failure in res_query.c with un-connectable name
234 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
235 [19822] math: libm.so install clobbers old version
236 [19825] network: resolv: send_vc can return uninitialized data in second
237 response to getaddrinfo
238 [19830] network: nss_dns: should check RDATA length against buffer length
239 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
240 confronted with A/AAAA records of invalid size
241 [19837] nss: nss_db: No retries for some long lines with a larger buffer
242 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
243 [19853] stdio: Printing IBM long double in decimal with high precision is
245 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
246 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
247 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
249 [19865] network: Assertion failure or memory leak in
250 _nss_dns_getcanonname_r
251 [19868] network: nss_dns: netent code does not skip over non-PTR records
252 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
254 [19881] string: Improve x86-64 memset
255 [19907] string: Incorrect memcpy tests
256 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
258 [19925] libc: termios.h XCASE namespace
259 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
260 [19929] libc: limits.h NL_NMAX namespace
261 [19931] stdio: Memory leak in vfprintf
262 [19957] libc: clone(CLONE_VM) access invalid parent memory
263 [19963] localedata: en_IL: New locale
264 [19989] stdio: stdio.h cuserid namespace
265 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
267 [19996] locale: langinfo.h nl_langinfo_l namespace
268 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
269 [20010] network: getaddrinfo: Stack overflow in hostent translation
271 [20012] stdio: libio: fmemopen append mode failure
272 [20014] stdio: stdio.h namespace for pre-threads POSIX
273 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
274 [20023] libc: fcntl.h timespec namespace
275 [20024] math: [x86_64] vectorized sincos trashes the stack
276 [20031] network: nss_hesiod: Heap overflow in get_txt_records
277 [20041] time: sys/time.h timespec namespace
278 [20043] libc: unistd.h missing cuserid for UNIX98 and before
279 [20044] libc: unistd.h missing pthread_atfork for UNIX98
280 [20051] libc: ttyslot in wrong header under wrong conditions
281 [20054] libc: gethostname not declared for XPG4
282 [20055] libc: termios.h missing tcgetsid for XPG4
283 [20072] dynamic-link: x86 init_cpu_features is called twice in static
285 [20073] libc: sys/stat.h fchmod namespace
286 [20074] libc: stdlib.h rand_r namespace
287 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
288 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
290 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
291 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
293 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
294 [20119] libc: Wrong mask for processors level type from CPUID
295 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
296 AS not supporting AVX512
297 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
299 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
300 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
302 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
303 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
304 [20178] libc: posix_spawn{p} should not call exit
305 [20191] stdio: libio: vtables hardening
306 [20195] string: FMA4 detection requires CPUID execution with register
308 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
309 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
311 [20212] math: acos (sNaN) returns sNaN
312 [20213] math: asin (sNaN) returns sNaN
313 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
314 [20218] math: [i386] asinhl (sNaN) returns sNaN
315 [20219] math: [i386] atanhl (sNaN) returns sNaN
316 [20222] stdio: fopencookie: Mangle function pointers
317 [20224] math: [i386] cbrtl (sNaN) returns sNaN
318 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
319 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
321 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
322 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
323 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
324 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
325 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
326 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
327 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
328 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
329 [20240] math: modf (sNaN) returns sNaN
330 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
331 [20250] math: frexp (sNaN) returns sNaN
332 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
333 [20255] math: [i386] fdim, fdimf return with excess range and precision /
335 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
336 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
337 subscript is below array bounds [-Werror=array-bounds]
338 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
339 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
341 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
342 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
344 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
346 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
347 [20316] localedata: id_ID: Februari instead of Pebruari
348 [20327] string: POWER8 strcasecmp returns incorrect result
349 [20347] math: Failure: Test: j0_downward (0xap+0)
350 [20348] libc: FAIL: misc/tst-preadvwritev64
351 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
352 [20350] libc: There is no test for p{read,write}64
353 [20357] math: Incorrect cos result for 1.5174239687223976
354 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
358 * Unicode 8.0.0 Support: Character encoding, character type info, and
359 transliteration tables are all updated to Unicode 8.0.0, using new
360 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
361 These updates cause user visible changes, such as the fixes for bugs
362 89, 16061, and 18568.
364 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
365 kernel-internal CPU set size. This means that requests that change the
366 CPU affinity which failed before (for example, an all-ones CPU mask) will
367 now succeed. Applications that need to determine the effective CPU
368 affinities need to call sched_getaffinity or pthread_getaffinity_np after
369 setting it because the kernel can adjust it (and the previous size check
370 would not detect this in the majority of cases).
372 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
373 the following new symbols are used: fts64_children, fts64_close,
374 fts64_open, fts64_read and fts64_set.
376 * getaddrinfo now detects certain invalid responses on an internal netlink
377 socket. If such responses are received, an affected process will
378 terminate with an error message of "Unexpected error <number> on netlink
379 descriptor <number>" or "Unexpected netlink response of size <number> on
380 descriptor <number>". The most likely cause for these errors is a
381 multi-threaded application which erroneously closes and reuses the netlink
382 file descriptor while it is used by getaddrinfo.
384 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
385 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
386 unnecessary serialization of memory allocation requests across threads.
387 The defect is now corrected. Users should see a substantial increase in
388 the concurent throughput of allocation requests for applications which
389 trigger this bug. Affected applications typically create and
390 destroy threads frequently. (Bug 19048 was reported and analyzed by
393 * There is now a --disable-timezone-tools configure option for disabling the
394 building and installing of the timezone related utilities (zic, zdump, and
395 tzselect). This is useful for people who build the timezone data and code
396 independent of the GNU C Library.
398 * The obsolete header <regexp.h> has been removed. Programs that require
399 this header must be updated to use <regex.h> instead.
401 * The obsolete functions bdflush, create_module, get_kernel_syms,
402 query_module and uselib are no longer available to newly linked binaries;
403 the header <sys/kdaemon.h> has been removed. These functions and header
404 were specific to systems using the Linux kernel and could not usefully be
405 used with the GNU C Library on systems with version 2.6 or later of the
408 * Optimized string, wcsmbs and memory functions for IBM z13.
409 Implemented by Stefan Liebler.
411 * Newly linked programs that define a variable called signgam will no longer
412 have it set by the lgamma, lgammaf and lgammal functions. Programs that
413 require signgam to be set by those functions must ensure that they use the
414 variable provided by the GNU C Library and declared in <math.h>, without
415 defining their own copy.
417 * The minimum GCC version that can be used to build this version of the GNU
418 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
419 still be used to compile programs using the GNU C Library.
421 Security related changes:
423 * An out-of-bounds value in a broken-out struct tm argument to strftime no
424 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
426 * The LD_POINTER_GUARD environment variable can no longer be used to disable
427 the pointer guard feature. It is always enabled. Previously,
428 LD_POINTER_GUARD could be used to disable security hardening in binaries
429 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
432 * An integer overflow in hcreate and hcreate_r could lead to an
433 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
435 * The catopen function no longer has unbounded stack usage. Reported by
438 * The nan, nanf and nanl functions no longer have unbounded stack usage
439 depending on the length of the string passed as an argument to the
440 functions. Reported by Joseph Myers. (CVE-2014-9761)
442 * A stack-based buffer overflow was found in libresolv when invoked from
443 libnss_dns, allowing specially crafted DNS responses to seize control
444 of execution flow in the DNS client. The buffer overflow occurs in
445 the functions send_dg (send datagram) and send_vc (send TCP) for the
446 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
447 family. The use of AF_UNSPEC triggers the low-level resolver code to
448 send out two parallel queries for A and AAAA. A mismanagement of the
449 buffers used for those queries could result in the response of a query
450 writing beyond the alloca allocated buffer created by
451 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
452 the overflow. Thanks to the Google Security Team and Red Hat for
453 reporting the security impact of this issue, and Robert Holiday of
454 Ciena for reporting the related bug 18665. (CVE-2015-7547)
456 The following bugs are resolved with this release:
458 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
459 [887] math: Math library function "logb" and "nextafter" inconsistent
460 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
461 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
462 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
463 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
465 [4404] localedata: German translation of "Alarm clock" is misleading
466 [6799] math: nextafter() and nexttoward() doen't set errno on
467 overflow/underflow errors
468 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
470 [10432] nis: _nss_nis_setnetgrent assertion failure
471 [11460] libc: fts has no LFS support
472 [12926] network: getaddrinfo()/make_request() may spin forever
473 [13065] nptl: Race condition in pthread barriers
474 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
475 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
477 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
478 [14912] libc: Rename non-installed bits/*.h headers
479 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
480 [15367] math: Let gcc use __builtin_isinf
481 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
482 [15421] math: lgamma wrongly sets signgam for ISO C
483 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
484 FE_INVALID with argument out of range
485 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
487 [15786] dynamic-link: ifunc resolver functions can smash function
489 [15918] math: Unnecessary check for equality in hypotf()
490 [16061] localedata: Review / update transliteration data
491 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
493 [16141] time: strptime %z offset restriction
494 [16171] math: drem should be alias of remainder
495 [16296] math: fegetround is pure?
496 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
497 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
499 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
500 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
502 [16422] math: [powerpc] math-float, math-double failing llrint tests with
503 "Exception "Inexact" set" on ppc32
504 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
505 [16517] math: Missing underflow exception from tanf/tan/tanl
506 [16519] math: Missing underflow exception from sinhf
507 [16520] math: Missing underflow exception from tanhf
508 [16521] math: Missing underflow exception from exp2
509 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
511 [16734] stdio: fopen calls mmap to allocate its buffer
512 [16961] math: nan function incorrect handling of bad sequences
513 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
514 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
515 [16985] locale: localedef: confusing error message when opening output
517 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
518 [17197] locale: Redundant shift character in iconv conversion output at
520 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
521 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
522 [17250] dynamic-link: static linking breaks nss loading
523 (getaddrinfo/getpwnam/etc...)
524 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
526 [17441] math: isnan() should use __builtin_isnan() in GCC
527 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
528 (related to lock elision)
529 [17787] manual: Exponent on page 324 of the PDF ends prematurely
530 [17886] time: strptime should be able to parse "Z" as a timezone with %z
531 [17887] time: strptime should be able to parse "+01:00" style timezones
532 [17905] libc: catopen() Multiple unbounded stack allocations
534 [18084] libc: backtrace (..., 0) dumps core on x86
535 [18086] libc: nice() sets errno to 0 on success
536 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
537 is too large (CVE-2015-8778)
538 [18251] dynamic-link: SONAME missing when audit modules provides path
539 [18265] libc: add attributes for wchar string and memory functions
540 [18370] math: csqrt missing underflows
541 [18421] libc: [hppa] read-only segment has dynamic relocations
542 [18472] libc: Obsolete syscall wrappers should be compat symbols
543 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
544 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
545 [18525] localedata: Remove locale timezone information
546 [18560] libc: [powerpc] spurious bits/ipc.h definitions
547 [18568] localedata: Update locale data to Unicode 8.0
548 [18589] locale: sort-test.sh fails at random
549 [18595] math: ctan, ctanh missing underflows
550 [18604] libc: assert macro-expands its argument
551 [18610] math: S390: fetestexcept() reports any exception if DXC-code
552 contains a vector instruction exception.
553 [18611] math: j1, jn missing errno setting on underflow
554 [18618] localedata: sync Chechen locale definitions with other *_RU
556 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
557 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
558 [18665] network: In send_dg, the recvfrom function is NOT always using the
559 buffer size of a newly created buffer (CVE-2015-7547)
560 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
562 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
564 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
565 [18699] math: tilegx cproj() for various complex infinities does not yield
567 [18724] libc: Harden put*ent functions against data injection
568 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
569 [18755] build: build errors with -DNDEBUG
570 [18757] stdio: fmemopen fails to set errno on failure
571 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
573 [18781] libc: openat64 lacks O_LARGEFILE
574 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
575 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
576 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
577 [18790] math: [ldbl-128ibm] tanhl inaccurate
578 [18795] libc: stpncpy fortification misses buffer lengths that are
580 [18796] build: build fails for --disable-mathvec
581 [18803] math: hypot missing underflows
582 [18820] stdio: fmemopen may leak memory on failure
583 [18823] math: csqrt spurious underflows
584 [18824] math: fma spurious underflows
585 [18825] math: pow missing underflows
586 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
587 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
588 [18870] build: sem_open.c fails to compile with missing symbol
590 [18872] stdio: Fix memory leak in printf_positional
591 [18873] libc: posix_fallocate overflow check ineffective
592 [18875] math: Excess precision leads incorrect libm
593 [18877] libc: arm: mmap offset regression
594 [18887] libc: memory corruption when using getmntent on blank lines
595 [18918] localedata: hu_HU: change time to HH:MM:SS format
596 [18921] libc: Regression: extraneous stat() and fstat() performed by
598 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
599 binaries (CVE-2015-8777)
600 [18951] math: tgamma missing underflows
601 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
603 [18953] localedata: lt_LT: change currency symbol to the euro
604 [18956] math: powf inaccuracy
605 [18961] math: [i386] exp missing underflows
606 [18966] math: [i386] exp10 missing underflows
607 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
608 [18969] build: multiple string test failures due to missing locale
610 [18970] libc: Reference of pthread_setcancelstate in libc.a
611 [18977] math: float / long double Bessel functions not in XSI POSIX
612 [18980] math: i386 libm functions return with excess range and precision
613 [18981] math: i386 scalb*, ldexp return with excess range and precision
614 [18982] stdio: va_list and vprintf
615 [18985] time: Passing out of range data to strftime() causes a segfault
617 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
618 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
619 [19012] locale: iconv_open leaks memory on error path
620 [19016] math: clog, clog10 inaccuracy
621 [19018] nptl: Mangle function pointers in tls_dtor_list
622 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
623 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
624 [19048] malloc: malloc: arena free list can become cyclic, increasing
626 [19049] math: [powerpc] erfc incorrect zero sign
627 [19050] math: [powerpc] log* incorrect zero sign
628 [19058] math: [x86_64] Link fail with -fopenmp and -flto
629 [19059] math: nexttoward overflow incorrect in non-default rounding modes
630 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
631 [19074] network: Data race in _res_hconf_reorder_addrs
632 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
633 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
634 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
636 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
638 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
639 [19086] manual: posix_fallocate64 documented argument order is wrong.
640 [19088] math: lround, llround missing exceptions close to overflow
642 [19094] math: lrint, llrint missing exceptions close to overflow threshold
643 [19095] math: dbl-64 lrint incorrect for 64-bit long
644 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
645 [19124] dynamic-link: ld.so failed to build with older assmebler
646 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
647 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
648 [19134] math: [powerpc32] lround, lroundf spurious exceptions
649 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
650 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
651 pthread_setaffinity_np
652 [19156] math: [ldbl-128] j0l spurious underflows
653 [19164] nptl: tst-getcpu fails with many possible CPUs
654 [19168] math: math/test-ildoubl and math/test-ldouble failure
655 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
656 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
658 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
659 (FE_NOMASK_ENV) do not clear SSE exceptions
660 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
661 _int_new_arena/reused_arena
662 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
663 [19201] math: dbl-64 remainder incorrect sign of zero result
664 [19205] math: bits/math-finite.h conditions do not match math.h and
666 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
667 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
668 for C99-based standards
669 [19212] libc: features.h not -Wundef clean
670 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
672 [19214] libc: Family and model identification for AMD CPU's are incorrect.
673 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
674 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
676 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
678 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
680 [19242] libc: strtol incorrect in Turkish locales
681 [19243] malloc: reused_arena can pick an arena on the free list, leading
682 to an assertion failure and reference count corruption
683 [19253] time: tzset() ineffective when temporary TZ did not include DST
685 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
686 [19270] math: [hppa] Shared libm missing __isnanl
687 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
688 MAP_HUGETLB and MAP_STACK defines
689 [19313] nptl: Wrong __cpu_mask for x32
690 [19347] libc: grantpt: try to force a specific gid even without pt_chown
691 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
692 [19350] math: [ldbl-128ibm] sinhl spurious overflows
693 [19351] math: [ldbl-128ibm] logl inaccurate near 1
694 [19363] time: x32: times() return value wrongly truncates/sign extends
696 [19367] dynamic-link: Improve branch prediction on Silvermont
697 [19369] network: Default domain name not reset by res_ninit when "search"
698 / "domain" entry is removed from resolv.conf
699 [19375] math: powerpc: incorrect results for POWER7 logb with negative
701 [19385] localedata: bg_BG: time separator should be colon, not comma
702 [19408] libc: linux personality syscall wrapper may erroneously return an
703 error on 32-bit architectures
704 [19415] libc: dladdr returns wrong names on hppa
705 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
706 IBM905, IBM907, and IBM909
707 [19439] math: Unix98 isinf and isnan functions conflict with C++11
708 [19443] build: build failures with -DDEBUG
709 [19451] build: Make check fails on test-double-vlen2
710 [19462] libc: Glibc failed to build with -Os
711 [19465] math: Wrong code with -Os
712 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
714 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
716 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
717 [19486] math: S390: Math tests fail with "Exception Inexact set".
718 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
719 [19550] libc: [mips] mmap negative offset handling inconsistent with other
721 [19590] math: Fail to build shared objects that use libmvec.so functions.
725 * The following bugs are resolved with this release:
727 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
728 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
729 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
730 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
731 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
732 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
733 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
734 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
735 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
736 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
737 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
738 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
739 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
740 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
741 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
742 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
743 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
744 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
745 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
746 18657, 18676, 18694, 18696, 18887.
748 * Cache information can be queried via sysconf() function on s390 e.g. with
749 _SC_LEVEL1_ICACHE_SIZE as argument.
751 * A buffer overflow in gethostbyname_r and related functions performing DNS
752 requests has been fixed. If the NSS functions were called with a
753 misaligned buffer, the buffer length change due to pointer alignment was
754 not taken into account. This could result in application crashes or,
755 potentially arbitrary code execution, using crafted, but syntactically
756 valid DNS responses. (CVE-2015-1781)
758 * The time zone file parser has been made more robust against crafted time
759 zone files, avoiding heap buffer overflows related to the processing of
760 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
761 large time zone data files. Overly long time zone specifiers in the TZ
762 variable no longer result in stack overflows and crashes.
764 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
765 for LD and GD on x86 and x86-64, has been implemented. You will need
766 binutils-2.24 or later to enable this optimization.
768 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
769 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
770 Hat). These updates cause user visible changes, such as the fix for bug
773 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
774 and getXXbyYY NSS calls for the same database, causing a denial-of-service
775 condition in some applications.
777 * Added vector math library named libmvec with the following vectorized x86_64
778 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
780 The library can be disabled with --disable-mathvec. Use of the functions is
781 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
782 Shared library libmvec.so is linked in as needed when using -lm (no need to
783 specify -lmvec explicitly for not static builds).
784 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
786 * A new fmemopen implementation has been added with the goal of POSIX
787 compliance. The new implementation fixes the following long-standing
788 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
789 old implementation is still present for use be by existing binaries.
791 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
792 releases. It has been fixed to match 2.19 and older, but binaries built
793 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
795 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
796 Contributed by Roland McGrath (Google).
798 * The header <regexp.h> is deprecated, and will be removed in a future
799 release. Use of this header will trigger a deprecation warning.
800 Application developers should update their code to use <regex.h> instead.
802 This header was formerly part of SUS, but was deprecated in 1994 and
803 removed from the standard in 2001. Also, the glibc implementation
804 leaks memory. See BZ#18681 for more details.
808 * The following bugs are resolved with this release:
810 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
811 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
812 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
813 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
814 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
815 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
816 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
817 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
818 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
819 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
822 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
823 too little memory for the to-be-scanned arguments and overflow the
824 allocated buffer. The implementation now correctly computes the required
825 buffer size when using malloc, and switches to malloc from alloca as
828 * A new semaphore algorithm has been implemented in generic C code for all
829 machines. Previous custom assembly implementations of semaphore were
830 difficult to reason about or ensure that they were safe. The new version
831 of semaphore supports machines with 64-bit or 32-bit atomic operations.
832 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
833 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
835 * Port to Altera Nios II has been contributed by Mentor Graphics.
837 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
838 implementations for powerpc64/powerpc64le.
839 Implemented by Adhemerval Zanella (IBM).
841 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
842 and powerpc64le. This may improve lock scaling of existing programs on
843 HTM capable systems. The lock elision code is only enabled with
844 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
845 powerpc will issue a transaction abort on every syscall to avoid side
846 effects being visible outside transactions.
848 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
849 AArch64. Contributed by ARM Ltd.
851 * i386 memcpy functions optimized with SSE2 unaligned load/store.
853 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
854 under certain input conditions resulting in the execution of a shell for
855 command substitution when the application did not request it. The
856 implementation now checks WRDE_NOCMD immediately before executing the
857 shell and returns the error WRDE_CMDSUB as expected.
859 * CVE-2012-3406 printf-style functions could run into a stack overflow when
860 processing format strings with a large number of format specifiers.
862 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
863 infinite loop if the DNS response contained a PTR record of an unexpected
866 * The minimum GCC version that can be used to build this version of the GNU
867 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
868 still be used to compile programs using the GNU C Library.
870 * The GNU C Library is now built with -Werror by default. This can be
871 disabled by configuring with --disable-werror.
873 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
875 * The obsolete sigvec function has been removed. This was the original
876 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
877 programs have been using instead for about 25 years. Of course, ABI
878 compatibility for old binaries using sigvec remains intact.
880 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
881 with newer versions of bison.
883 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
884 The original MIPS o32 hard-float ABI requires an FPU where double-precision
885 registers overlay two consecutive single-precision registers. MIPS32R2
886 introduced a new FPU mode (FR=1) where double-precision registers extend the
887 corresponding single-precision registers which is incompatible with the
888 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
889 require the use of FR=1 making a transition necessary. New o32 ABI
890 extensions enable users to migrate over time from the original o32 ABI
891 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
892 tracks the ABI of any loaded object and verifies that new objects are
893 compatible. Mode transitions will also be requested as required and
894 unsupportable objects will be rejected. The ABI checks include both soft and
895 hard float ABIs for o32, n32 and n64.
897 GCC 5 with GNU binutils 2.25 onwards:
898 It is strongly recommended that all o32 system libraries are built using the
899 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
900 with the original and all new o32 ABI extensions. Configure a MIPS GCC
901 compiler using --with-fp-32=xx to set this by default.
905 * The following bugs are resolved with this release:
907 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
908 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
909 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
910 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
911 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
912 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
913 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
914 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
915 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
916 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
917 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
918 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
919 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
920 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
921 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
923 * Reverted change of ABI data structures for s390 and s390x:
924 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
925 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
926 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
927 are preserved pointing straight to the same implementation as the old ones.
928 Given that, new callers will simply provide a too-big buffer to these
929 functions. Any applications/libraries out there that embed jmp_buf or
930 ucontext_t in an ABI-relevant data structure that have already been rebuilt
931 against 2.19 headers will have to rebuilt again. This is necessary in any
932 case to revert the breakage in their ABI caused by the glibc change.
934 * Support for file description locks is added to systems running the
935 Linux kernel. The standard file locking interfaces are extended to
936 operate on file descriptions, not file descriptors, via the use of
937 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
938 are associated with an open file instead of a process.
940 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
942 * The minimum Linux kernel version that this version of the GNU C Library
943 can be used with is 2.6.32.
945 * Running the testsuite no longer terminates as soon as a test fails.
946 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
947 with PASS or FAIL lines for individual tests. A summary of the results is
948 printed, including a list of failing lists, and "make check" exits with
949 error status if there were any unexpected failures. "make check
950 stop-on-test-failure=y" may be used to keep the old behavior.
952 * The am33 port, which had not worked for several years, has been removed
955 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
956 supported; they now act the same as _DEFAULT_SOURCE (but generate a
957 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
958 conflicted with POSIX (support for which was removed in 2.19), the
959 interfaces those macros enabled remain available when compiling with
960 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
963 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
965 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
966 This may improve lock scaling of existing programs on TX capable systems.
967 The lock elision code is only built with --enable-lock-elision=yes and
968 then requires a GCC version supporting the TX builtins. With lock elision
969 default mutexes are elided via __builtin_tbegin, if the cpu supports
970 transactions. By default lock elision is not enabled and the elision code
973 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
974 copy the path argument. This allowed programs to cause posix_spawn to
975 deference a dangling pointer, or use an unexpected pathname argument if
976 the string was modified after the posix_spawn_file_actions_addopen
979 * All supported architectures now use the main glibc sysdeps directory
980 instead of some being in a separate "ports" directory (which was
981 distributed separately before glibc 2.17).
983 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
984 On configurations that support it (all Linux configurations), it's now
985 used regardless of the --enable-add-ons switch to configure. It is no
986 longer possible to build such configurations without pthreads support.
988 * Locale names, including those obtained from environment variables (LANG
989 and the LC_* variables), are more tightly checked for proper syntax.
990 setlocale will now fail (with EINVAL) for locale names that are overly
991 long, contain slashes without starting with a slash, or contain ".." path
992 components. (CVE-2014-0475) Previously, some valid locale names were
993 silently replaced with the "C" locale when running in AT_SECURE mode
994 (e.g., in a SUID program). This is no longer necessary because of the
997 * On x86-64, the dynamic linker's lazy-binding support is now compatible
998 with application code using Intel MPX instructions. (With all previous
999 versions, the MPX register state could be clobbered when making calls
1000 into or out of a shared library.) Note that while the new dynamic
1001 linker is compatible with all known x86 hardware whether or not it
1002 supports Intel MPX, some x86 instruction-set emulators might fail to
1003 handle the new instruction encodings. This is known to affect Valgrind
1004 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1005 release), and might affect other tools that do instruction emulation.
1007 * Support for loadable gconv transliteration modules has been removed.
1008 The support for transliteration modules has been non-functional for
1009 over a decade, and the removal is prompted by security defects. The
1010 normal gconv conversion modules are still supported. Transliteration
1011 with //TRANSLIT is still possible, and the //IGNORE specifier
1012 continues to be supported. (CVE-2014-5119)
1014 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1015 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1016 resulting a denial-of-service security vulnerability in applications which
1017 use functions related to iconv. (CVE-2014-6040)
1021 * The following bugs are resolved with this release:
1023 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1024 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1025 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1026 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1027 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1028 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1029 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1030 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1031 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1032 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1033 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1034 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1035 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1036 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1037 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1038 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1039 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1040 16431, 16453, 16474, 16506, 16510, 16529
1042 * Slovenian translations for glibc messages have been contributed by the
1043 Translation Project's Slovenian team of translators.
1045 * The public headers no longer use __unused nor __block. This change is to
1046 support compiling programs that are derived from BSD sources and use
1047 __unused internally, and to support compiling with Clang's -fblock
1048 extension which uses __block.
1050 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1051 large collation sequences to optimize multiple passes. This cache
1052 computation may overflow for large collation sequences and may cause a
1053 stack or buffer overflow. This is now fixed to use a slower algorithm
1054 which does not use a cache if there is an integer overflow.
1056 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1057 rules for large collation sequences to optimize multiple passes and falls
1058 back to alloca if malloc fails, resulting in a possible stack overflow.
1059 The implementation now falls back to an uncached collation sequence lookup
1062 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1063 initialized for static applications resulting in the security feature
1064 being disabled. The pointer guard is now correctly initialized to a
1065 random value for static applications. Existing static applications need
1066 to be recompiled to take advantage of the fix (bug 15754).
1068 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1069 to the d_name member of struct dirent, or omit the terminating NUL
1070 character. (Bugzilla #14699).
1072 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1073 aligned_alloc functions could allocate too few bytes or corrupt the
1074 heap when passed very large allocation size values (Bugzilla #15855,
1077 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1078 for AF_INET6 has been fixed (Bugzilla #16072).
1080 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1081 pap_CW, quz_PE, the_NP.
1083 * Substantially revised locales: gd_GB, ht_HT
1085 * The LC_ADDRESS field was updated to support country_car for almost all
1088 * ISO 1427 definitions were updated.
1090 * ISO 3166 definitions were updated.
1092 * The localedef utility now supports --big-endian and --little-endian
1093 command-line options to generate locales for a different system from that
1094 for which the C library was built.
1096 * Binary locale files now only depend on the endianness of the system for
1097 which they are generated and not on other properties of that system. As a
1098 consequence, binary files generated with new localedef may be incompatible
1099 with old versions of the GNU C Library, and binary files generated with
1100 old localedef may be incompatible with this version of the GNU C Library,
1101 in the following circumstances:
1103 + Locale files may be incompatible on m68k systems.
1105 + Locale archive files (but not separate files for individual locales) may
1106 be incompatible on systems where plain "char" is signed.
1108 * The configure option --disable-versioning has been removed. Builds with
1109 --disable-versioning had not worked for several years.
1111 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1112 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1114 * SystemTap probes for malloc have been introduced.
1116 * SystemTap probes for slow multiple precision fallback paths of
1117 transcendental functions have been introduced.
1119 * Support for powerpc64le has been added.
1121 * The soft-float powerpc port now supports e500 processors.
1123 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1125 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1126 set of header declarations that are enabled by default, even when other
1127 feature test macros or compiler options such as -std=c99 would otherwise
1128 disable some of those declarations.
1130 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1131 conflict with POSIX. The libbsd-compat library (which was a dummy library
1132 that did nothing) has also been removed.
1134 * Preliminary documentation about Multi-Thread, Async-Signal and
1135 Async-Cancel Safety has been added.
1137 * Change of ABI data structures for s390 and s390x:
1138 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1139 allow for future hardware extensions. All library functions that accept or
1140 return these structures were versioned in order to provide backwards
1141 compatibility with existing code. However, not all cases can be handled
1142 with interface versioning. If an application embeds either structure into
1143 another structure and that structure is passed to another compilation unit
1144 which expects the newer larger-sized object then any access to the new
1145 fields will result in undefined behaviour. Similarly any access to fields
1146 that were moved by the enlarging of the structures will cause undefined
1147 behaviour. To fix the undefined behaviour all objects that are part of the
1148 final in-memory image must agree on the size of structures, and this may
1149 require recompilation.
1153 * The following bugs are resolved with this release:
1155 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1156 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1157 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1158 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1159 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1160 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1161 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1162 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1163 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1164 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1165 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1166 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1167 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1170 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1171 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1172 Distributions can re-enable building and using pt_chown via the new configure
1173 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1174 considerable security risks and should only be used if the distribution
1175 understands and accepts the risks.
1177 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1180 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1181 fixed (Bugzilla #15330).
1183 * Add support for calling C++11 thread_local object destructors on thread
1184 and program exit. This needs compiler support for offloading C++11
1185 destructor calls to glibc.
1187 * Improved worst case performance of libm functions with double inputs and
1190 * Support for priority inherited mutexes in pthread condition variables on
1191 non-x86 architectures.
1193 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1195 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1197 * Optimized string functions for ARM. Implemented by Will Newton and
1200 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1202 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1205 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1206 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1208 * Added a benchmark framework to track performance of functions in glibc.
1210 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1211 It is based on draft TS 18661 and currently enabled as a GNU extension.
1213 * On Linux, the clock function now uses the clock_gettime system call
1214 for improved precision, rather than old times system call.
1216 * Added support for version-3 tz format files. This is needed when using
1217 the tz database release 2013e or later, and affects a few unusual cases --
1218 currently only TZ='America/Godthab' for time stamps after 2037.
1220 * Added new API functions pthread_getattr_default_np and
1221 pthread_setattr_default_np to get and set the default pthread
1222 attributes of a process.
1224 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1225 This may improve lock scaling of existing programs on TSX capable systems.
1226 When the --enable-lock-elision=yes parameter is specified at configure
1227 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1230 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1231 availability). Implemented by Ryan S. Arnold.
1233 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1237 * The following bugs are resolved with this release:
1239 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1240 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1241 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1242 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1243 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1244 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1245 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1246 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1247 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1248 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1249 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1250 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1251 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1252 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1253 14879, 14889, 14893, 14898, 14914.
1255 * Optimization of memcpy for MIPS.
1257 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1258 EMFILE has been fixed (Bugzilla #14889).
1260 * The add-on ports collection is now distributed in the "ports" subdirectory
1261 of the main GNU C Library distribution, rather than separately.
1263 * Port to ARM AArch64 contributed by Linaro.
1265 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1266 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1268 Implemented by Andreas Krebbel.
1270 * The new function secure_getenv allows secure access to the environment,
1271 returning NULL if running in a SUID/SGID process. This function replaces
1272 the internal function __secure_getenv.
1274 * SystemTap static probes have been added into the dynamic linker.
1275 Implemented by Gary Benson.
1277 * Optimizations of string functions strstr, strcasestr and memmem.
1278 Implemented by Maxim Kuvyrkov.
1280 * The minimum Linux kernel version that this version of the GNU C Library
1281 can be used with is 2.6.16.
1283 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1284 powerpc POWER7. Implemented by Will Schmidt.
1286 * New configure option --disable-nscd builds the C library such that it
1287 never attempts to contact the Name Service Caching Daemon (nscd).
1288 New configure option --disable-build-nscd avoids building nscd itself;
1289 this is the default if --disable-nscd is used.
1291 * Improved support for cross-compilation, including cross-testing and
1292 bootstrap builds without a previously built glibc.
1294 * Several testsuite tests are now able to test multiple IFUNC variants of an
1295 interface, rather than just testing the one that would be chooen by
1298 * New configure options --with-bugurl and --with-pkgversion, for
1299 distributors to use to embed their bug-reporting and package version
1300 information in --help and --version output.
1302 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1303 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1304 allows creation of chroots without the procfs mounted on /proc.
1306 * The `crypt' function now fails if passed salt bytes that violate the
1307 specification for those values. On Linux, the `crypt' function will
1308 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1309 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1310 when the mode is enabled.
1312 * The `clock_*' suite of functions (declared in <time.h>) is now available
1313 directly in the main C library. Previously it was necessary to link with
1314 -lrt to use these functions. This change has the effect that a
1315 single-threaded program that uses a function such as `clock_gettime' (and
1316 is not linked with -lrt) will no longer implicitly load the pthreads
1317 library at runtime and so will not suffer the overheads associated with
1318 multi-thread support in other code such as the C++ runtime library.
1320 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1325 * The following bugs are resolved with this release:
1327 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1328 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1329 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1330 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1331 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1332 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1333 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1334 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1335 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1336 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1337 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1338 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1339 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1340 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1341 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1342 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1343 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1344 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1345 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1346 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1347 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1348 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1351 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1352 configuring glibc with:
1353 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1354 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1355 Implemented by H.J. Lu.
1359 + define static_assert
1361 + do not declare gets
1363 + declare at_quick_exit and quick_exit also for ISO C11
1365 + aligned_alloc. NB: The code is deliberately allows the size parameter
1366 to not be a multiple of the alignment. This is a moronic requirement
1367 in the standard but it is only a requirement on the caller, not the
1370 + timespec_get added
1372 + uchar.h support added
1374 + CMPLX, CMPLXF, CMPLXL added
1376 Implemented by Ulrich Drepper.
1378 * Support for the IA-64 has been moved to ports.
1380 * Remove support for anything but ELF binary format
1382 * Checking versions of poll, ppoll added.
1383 Implemented by Ulrich Drepper.
1385 * More generic and 64-bit performance optimizations to math functions.
1386 Implemented by Ulrich Drepper.
1388 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1389 headers and functions available at compile time as they were before
1390 version 2.14. This option will be removed at some time in the future
1391 after the TI-RPC library becomes fully sufficient for the needs of
1392 existing applications.
1394 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1395 Note that glibc is not expected to work with any Linux kernel version
1398 * New header <sys/auxv.h> and function getauxval allowing easy access to
1399 the AT_* key-value pairs passed from the Linux kernel. The header also
1400 defines the HWCAP_* bits associated with the AT_HWCAP key.
1402 * New locales: mag_IN
1404 * New configure option --enable-systemtap builds SystemTap static probes
1405 into libc for setjmp and longjmp and into libpthread for various operations.
1406 So far the setjmp/longjmp probes and some of the libpthread probes are
1407 provided only for i*86 and x86_64.
1408 Implemented by Roland McGrath and Rayson Ho.
1410 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1412 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1415 * More optimized functions for SPARC. Implemented by David S. Miller.
1417 * Improved support for cross-compilation, especially bootstrap builds
1418 without a previously built glibc.
1420 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1421 Chris Metcalf from Tilera.
1423 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1424 now supported for ARM processors.
1426 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1427 as the name of the dynamic linker, to distinguish it from the
1428 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1430 * Support for CRIS has been removed from ports.
1432 * A new class of installed header has been documented for low-level
1433 platform-specific functionality. PowerPC added the first instance with a
1434 function to provide time base register access. Contributed by Tulio
1435 Magno Quites Machado Filho.
1437 * ix86 configurations now install header files that are consistent with
1438 what x86-64 configurations install. These same header files can be used
1439 for -m32, -m64, or -mx32 builds.
1440 Contributed by H.J. Lu.
1442 * Math library bug fixes. A thorough audit of all open math library bugs was
1443 conducted by Joseph Myers. Significant progress was made on many math
1444 library bugs resulting in more accurate exceptions and function results.
1445 Many thanks to all those that contributed including Andreas Jaeger for his
1446 patch review and work on the x87 trigonometric instruction issues.
1448 * Timezone data is no longer installed. Timezone-related binaries and scripts
1449 will continue to be installed. Users should obtain their timezone data from
1450 their distribution provider or from the tzdata package at
1451 <ftp://munnari.oz.au/pub/>.
1455 * The following bugs are resolved with this release:
1457 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1458 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1459 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1460 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1461 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1462 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1463 13484, 13506, 13515, 13523, 13524, 13538, 13540
1465 * New program pldd to list loaded object of a process
1466 Implemented by Ulrich Drepper.
1468 * Add nss_db support back to glibc. No more dependency on Berkeley db
1469 and support for initgroups lookups.
1470 Implemented by Ulrich Drepper.
1472 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1473 Contributed by HJ Lu.
1475 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1476 Contributed by HJ Lu.
1478 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1479 on x86-32 and x86-64.
1480 Contributed by Liubov Dmitrieva.
1482 * Optimized strchr and strrchr for SSE on x86-32.
1483 Contributed by Liubov Dmitrieva.
1485 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1486 for x86-64 and x86-32.
1487 Contributed by Liubov Dmitrieva.
1489 * New interfaces: scandirat, scandirat64
1490 Implemented by Ulrich Drepper.
1492 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1493 Implemented by Ulrich Drepper.
1495 * nscd now also caches the netgroup database.
1496 Implemented by Ulrich Drepper.
1498 * Integrate libm with gcc's -ffinite-math-only option.
1499 Implemented by Ulrich Drepper.
1501 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1502 to math functions. Implemented by Ulrich Drepper.
1504 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1505 Implemented by Ulrich Drepper.
1507 * New Linux interfaces: process_vm_readv, process_vm_writev
1509 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1510 Implemented by Ulrich Drepper.
1512 * Optimized nearbyint and strcasecmp for PPC.
1513 Implemented by Adhemerval Zanella.
1515 * New locales: bho_IN, unm_US, es_CU, ta_LK
1519 * The following bugs are resolved with this release:
1521 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1522 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1523 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1524 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1525 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1526 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1527 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1528 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1529 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1530 12795, 12811, 12813, 12814, 12841
1532 * The RPC implementation in libc is obsoleted. Old programs keep working
1533 but new programs cannot be linked with the routines in libc anymore.
1534 Programs in need of RPC functionality must be linked against TI-RPC.
1535 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1537 Visible changes of this change include (obviously) the inability to link
1538 programs using RPC functions without referencing the TI-RPC library and the
1539 removal of the RPC headers from the glibc headers.
1540 Implemented by Ulrich Drepper.
1542 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1543 syncfs, setns, sendmmsg
1545 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1546 yue_HK, lij_IT, mhr_RU
1548 * New encodings: CP770, CP771, CP772, CP773, CP774
1550 * New program sotruss to trace calls through PLTs
1551 Implemented by Ulrich Drepper.
1553 * The malloc hook implementation is marked deprecated and will be removed
1554 from the default implementation in the next version. The design never
1555 worked ever since the introduction of threads. Even programs which do
1556 not create threads themselves can use multiple threads created internally.
1560 * The following bugs are resolved with this release:
1562 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1563 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1564 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1565 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1568 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1570 * POWER7 optimizations: memset, memcmp, strncmp
1572 * New optimized string functions for x86-64: strnlen (SSE2),
1573 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1574 Implemented by Ulrich Drepper.
1578 * The following bugs are resolved with this release:
1580 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1581 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1582 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1583 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1584 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1585 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1586 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1587 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1589 * New interfaces: pthread_getname_np, pthread_setname_np
1591 * New Linux interface: recvmmsg
1593 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1595 * The dynamic linker now recognizes supported ABI versions from the
1596 EI_ABIVERSION field in the ELF header.
1597 Implemented by Ulrich Drepper.
1599 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1600 will not be used to fill in password fields in the passwd.byname replies.
1601 Instead it is used to synthesize the shadow.byname table, should it be
1602 missing. This is a useful mode in some installations involving Solaris.
1603 Implemented by Ulrich Drepper.
1605 * New locales: kok_IN, sq_MK, cv_RU
1609 * The following bugs are resolved with this release:
1611 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1612 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1613 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1614 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1615 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1616 10789, 10817, 10823, 10840, 10847
1618 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1620 Implemented by Ulrich Drepper.
1622 * Checking version of longjmp added that fails if an uninitialized stack
1623 frame would be created. Implemented by Ulrich Drepper.
1625 * STT_GNU_IFUNC is now supported in static executables.
1626 Implemented by H.J. Lu.
1628 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1630 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1631 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1632 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1633 Contributed by H.J. Lu.
1635 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1636 Implemented by Ulrich Drepper.
1638 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1640 Contributed by H.J. Lu.
1642 * Support for fma instruction in AVX on x86-64.
1643 Implemented by H.J. Lu and Ulrich Drepper.
1645 * AVX support in x86-64 auditing support in ld.so.
1646 Implemented by H.J. Lu.
1648 * STB_GNU_UNIQUE support added.
1649 Implemented by Ulrich Drepper.
1651 * Implement second fallback mode for optimized DNS lookup for even more
1652 broken environments. If two requests from the same port are not
1653 handled correctly close the socket and open a new one before sending
1654 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1655 can be used to select this mode right away, instead of rediscovering the
1656 necessity is every process again.
1657 Implemented by Ulrich Drepper.
1659 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1660 Implemented by Adam Tkac.
1662 * Optimized iconv conversions for S390x.
1663 Implemented by Andreas Krebbel.
1665 * Using condvars with PI mutexes is now more efficient due to kernel
1666 support for requeueing to PI futexes. NPTL support added for x86-64.
1667 Implemented by Ulrich Drepper.
1669 * New locales: ps_AF, my_MM
1673 * The following bugs are resolved with this release:
1675 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1676 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1677 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1678 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1679 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1681 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1682 Implemented by Ulrich Drepper.
1684 * New Linux interfaces: accept4, fallocate, fallocate64.
1685 Implemented by Ulrich Drepper.
1687 * Correct declarations of string function when used in C++ code. This
1688 could lead to compile errors for invalid C++ code.
1690 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1693 * New POSIX 2008 interface: psiginfo
1694 Implemented by Ulrich Drepper.
1696 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1697 Implemented by Ulrich Drepper.
1699 * Support for selecting between multiple function definitions at runtime
1700 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1702 * The libcrypt library can now use the hash function implementations in
1703 NSS. Implemented by Ulrich Drepper.
1705 * The malloc implementation can be compiled to be less memory efficient
1706 but higher performing in multi-threaded programs.
1707 Implemented by Ulrich Drepper.
1709 * New locales: nan_TW@latin, ks_IN
1711 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1712 Implemented by Ulrich Drepper.
1714 * Extended printf hook support. It is possible to use user-defined types
1715 and extend existing format specifiers.
1716 Implemented by Ulrich Drepper.
1718 * Handling for group shadow files has been added.
1719 Implemented by Ulrich Drepper.
1721 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1722 servers (the case, e.g., for some people using the built-in DNS
1723 server in ADSL modems/routers). There is a once-per-process timeout
1724 in case of a broken server. To avoid it, users can run nscd or put
1725 'options single-request' in /etc/resolv.conf.
1726 Implemented by Ulrich Drepper.
1730 * The following bugs are resolved with this release:
1732 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1733 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1734 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1735 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1736 6968, 6974, 6980, 6995, 7008, 7009, 7029
1738 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1739 up at the same time. Implemented by Ulrich Drepper.
1741 * TLS descriptors for LD and GD on x86 and x86-64.
1742 Implemented by Alexandre Oliva.
1744 * getaddrinfo now handles DCCP and UDPlite.
1745 Implemented by Ulrich Drepper.
1747 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1748 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1749 Implemented by Ulrich Drepper.
1751 * New implementation of memmem, strstr, and strcasestr which is O(n).
1752 Implemented by Eric Blake.
1754 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1756 * Implement "e" option for popen to open file descriptor with the
1757 close-on-exec flag set. Implemented by Ulrich Drepper.
1759 * Implement "b" mode for fmemopen. In this mode writes writes don't
1760 implicitly add a NUL byte and seeks from the end of the buffer really
1761 use the buffer end, not the string length as the basis.
1762 Implemented by Ulrich Drepper.
1764 * Many functions, exported and internal, now atomically set the close-on-exec
1765 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1767 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1769 Implemented by Pravin Satpute.
1771 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1775 * The following bugs are resolved with this release:
1777 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1778 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1779 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1780 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1781 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1782 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1783 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1785 * New locales: bo_CN, bo_IN, shs_CA.
1787 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1789 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1790 Implemented by Pravin Satpute.
1792 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1794 * nscd caches now all timeouts for DNS entries
1795 Implemented by Ulrich Drepper.
1797 * nscd is more efficient and wakes up less often.
1798 Implemented by Ulrich Drepper.
1800 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1801 vdprintf, and obstack_vprintf.
1802 Implemented by Jakub Jelinek.
1804 * Faster memset for x86-64.
1805 Implemented by Harsha Jagasia and H.J. Lu.
1807 * Faster memcpy on x86.
1808 Implemented by Ulrich Drepper.
1810 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1811 Implemented by Ulrich Drepper.
1813 * Faster sqrt and sqrtf implemention for some PPC variants.
1814 Implemented by Steven Munroe.
1818 * The following bugs are resolved with this release:
1820 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1821 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1822 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1823 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1824 5071, 5103, 5104, 5112, 5113, 5184, 5186
1826 * More checking functions: fread, fread_unlocked, open*, mq_open.
1827 Implemented by Jakub Jelinek and Ulrich Drepper.
1829 * Extend fortification to C++. Implemented by Jakub Jelinek.
1831 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1832 by not recognizing 'a' as a modifier when those specs are requested.
1833 Implemented by Jakub Jelinek.
1835 * PPC optimizations to math and string functions.
1836 Implemented by Steven Munroe.
1838 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1839 options to be passed. Implemented by Ulrich Drepper.
1841 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1843 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1844 Implemented by Ulrich Drepper.
1846 * Handle private futexes in the NPTL implementation.
1847 Implemented by Jakub Jelinek and Ulrich Drepper.
1849 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1850 Implemented by Roland McGrath and Ulrich Drepper.
1852 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1854 * SHA-256 and SHA-512 based password encryption.
1855 Implemented by Ulrich Drepper.
1857 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1858 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1861 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1862 Implemented by Ulrich Drepper.
1866 * The following bugs are resolved with this release:
1868 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1869 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1870 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1871 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1872 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1873 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1874 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1877 * New Linux interfaces: epoll_pwait, sched_getcpu.
1879 * New generic interfaces: strerror_l.
1881 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1885 * The following bugs are resolved with this release:
1887 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1888 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1889 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1890 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1891 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1892 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1893 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1894 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1895 3225, 3251, 3252, 3253, 3273
1897 * For Linux, the sorting of addresses returned by getaddrinfo now also
1898 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1899 Implemented by Ulrich Drepper.
1901 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1902 Implemented by Ulrich Drepper.
1904 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1906 * New iconv module for MIK. Contributed by Alexander Shopov.
1908 * For sites with broken group and/or passwd database, the auto-propagate
1909 option of nscd can prevent creating ID lookup entries from the results
1910 of a name lookup and vice versa. This usually is no problem but some
1911 site might have problems with the default behavior.
1912 Implemented by Ulrich Drepper.
1914 * Iterating over entire database in NIS can be slow. With the
1915 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1916 to trade time for memory. The entire database will be read at once.
1917 Implemented by Ulrich Drepper.
1919 * The interfaces introduced in RFC 3542 have been implemented by
1922 * Support for the new ELF hash table format was added by Ulrich Drepper.
1924 * Support for priority inheritance mutexes added by Jakub Jelinek and
1927 * Support for priority protected mutexes added by Jakub Jelinek.
1929 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1930 or_IN, csb_PL, fy_NL, sr_ME.
1934 * More overflow detection functions.
1936 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1937 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1939 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1940 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1941 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1942 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1943 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1944 by Masahide Washizawa.
1946 * It is now possible to install audit libraries for the dynamic linker using
1947 LD_AUDIT. Implemented by Ulrich Drepper.
1949 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1950 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1951 For a libc and libpthread that works well on Linux 2.4 kernels, we
1952 recommend using the stable 2.3 branch.
1954 * The new function open_wmemstream acts like open_memstream,
1955 but uses a wchar_t wide character buffer.
1957 * The new function ppoll is an improved version of poll, similar to pselect.
1959 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1960 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1961 renameat, unlinkat, linkat, symlinkat, readlinkat.
1963 * New Linux kernel system calls: unshare,
1964 inotify_init, inotify_add_watch, inotify_rm_watch.
1966 * The euidaccess function is now also known by the alias eaccess,
1967 for compatibility with some other systems.
1969 * Timezone data updated to 2006b version.
1973 * The following bugs are resolved with this release:
1975 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1976 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1977 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1978 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1979 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1980 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1982 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1984 * As of this release, GCC 4 can be used to compile the C Library.
1986 * Timezone data updated to 2005m version.
1990 * The following bugs are resolved with this release:
1992 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1993 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1994 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1995 777, 787, 821, 822, 823, 825
1997 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2001 * Support for RFC 3678. Real implementations exist only for Linux so far.
2002 Implemented by Ulrich Drepper.
2004 * nscd can now cache entries persistently. Expiring entries are reloaded.
2005 For speedups the cache can be shared in memory with client processes.
2006 Implemented by Ulrich Drepper.
2008 * nscd can now perform SELinux checks.
2009 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2011 * getaddrinfo queries are now cached. Canonical name lookup is performed
2013 Implemented by Ulrich Drepper.
2015 * The nothrow function attribute is used when headers are used by gcc when
2016 compiling C code. This can avoid significant amounts of exception
2019 * The malloc functions perform more error checking and are stricter when
2020 it comes to reacting on errors. The default action is to terminate
2021 the process after showing an error message. Implemented by Ulrich Drepper.
2023 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2024 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2026 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2027 namespaces using the new function dlmopen(). This feature is of course,
2028 like most other dynamic loading functionality, not available in statically
2029 linked applications. Implemented by Ulrich Drepper.
2031 * Low-overhead boundary checking variants of string and some stdio functions
2032 were added. These are to be used in conjunction with a gcc patch by
2033 Jakub Jelinek which adds calls to these functions if possible.
2034 Implemented by Jakub Jelinek and Ulrich Drepper.
2036 * Old code for several operating systems and machine architectures that
2037 have not been in working condition in a long time have been removed from
2038 the main source tree maintained by the GNU C Library's maintainers.
2039 These files are now reside in the separate `ports' source module
2040 that is usable as an add-on when building the library.
2044 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2045 interrogate the dynamic linker, compatible with the Solaris interface.
2047 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2048 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2050 * getifaddrs now uses the netlink interface on Linux to get its information.
2051 Implemented by Thorsten Kukuk.
2053 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2054 Implemented by Ulrich Drepper.
2056 * support for non-executable stacks on x86 has been added. Changes mostly
2059 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2062 * getaddrinfo now performs destination address selection according to
2067 * Thread-safe interfaces for many functions that access locale data
2068 were added in version 2.3, but these features were omitted from NEWS.
2069 Many functions have variants with an `_l' suffix that take a `locale_t'
2070 object as a parameter rather than consulting the current locale.
2071 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2072 create and maintain `locale_t' objects. Additionally, the new function
2073 `uselocale' sets "the current locale" (as used by functions not so
2074 parameterized) set for an individual thread. These features were added
2075 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2077 * The functions getresuid, getresgid, setresuid, and setresgid, which
2078 have long been available on Linux, are now declared in <unistd.h>
2079 and are now also available on the Hurd.
2081 * ELF thread-local storage support (TLS) now works on x86-64.
2083 * The new dynamic string token $LIB is expanded in shared library names.
2084 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2086 * Aldy Hernandez contributed complete software floating point support for
2087 PowerPC machines with no FPU.
2089 * fexecve is implemented on Linux.
2091 * The `btowc' function should work at least twice as fast due to
2092 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2094 * With approriate thread add-ons cancelable functions are now implemented
2095 in libc.so as well. No need to call the function in libpthread. This
2096 change allowed to finally disable the incorrect and expensive handling
2097 of weak definition in ld.so.
2099 * Yet more PLT entries in libc.so have been removed. We finally arrived
2100 at the bare minimum. Startup times improved appropriately.
2102 * Support for the new Linux/x86 system call interface was added. The
2103 AT_SYSINFO auxiliary vector entry is recognized and handled.
2107 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2110 * iconv (the program and the interface) now accepts empty names (excluding
2111 options like //TRANSLIT) to mean "use charset of current locale".
2113 * localedef can now transliterate characters in strings which are not in
2114 the provided charmap. The information from the input locale is used.
2116 * Prelinking support was added for ELF targets. This requires additional
2117 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2119 * Read-only stdio streams now use mmap to speed up operation by eliminating
2120 copying and buffer underflows. To use add 'm' to the mode string of
2121 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2123 * The malloc functions were completely rewritten by Wolfram Gloger based
2124 on Doug Lea's malloc-2.7.0.c.
2126 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2127 implementation of regex.
2129 * Bruno Haible upgraded the iconv and locale implementation to support
2132 * Contents of the LC_* and LANG environment variables in the CEN style are
2133 not recognized anymore. It never was used. Change by Ulrich Drepper.
2135 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2136 thread-local storage (TLS) ABI on some platforms.
2137 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2139 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2140 EUC-JISX0213, and TSCII.
2142 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2143 BSD-compatible interface for getting all network interface addresses.
2144 Implementation for IPv4 by Roland McGrath.
2146 * Loading of locale data is faster due to the introduction of a locale
2147 archive. Implemented by Roland McGrath and Ulrich Drepper.
2149 * Startup times are significantly reduced by not using exported functions
2150 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2153 * Steven Munroe contributed a port to PowerPC64/Linux.
2157 * The Hurd now uses the GNU libio implementation of stdio rather than the
2158 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2160 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2161 with the same behavior as the Linux system call of the same name.
2165 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2166 128-bit long double format.
2168 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2169 IBM1161, and IBM1162 charsets.
2171 * Andreas Jaeger contributed a port to x86-64/Linux.
2173 * Peter Bruin contributed a port to PowerPC/Hurd.
2175 * libc functions using I/O streams now can handle wide-oriented streams
2178 * optimizations in the dynamic linker. Binaries created by recent binutils
2179 versions start up quicker due to reduced time spent on relocations.
2181 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2185 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2186 asinh, atanh, j0 for the 128-bit long double format.
2188 * Bruno Haible updated all the code handling Unicode in some form to
2189 support Unicode 3.1.
2191 * Speed of regex for single-byte locales is back to previous levels.
2192 Patch by Isamu Hasegawa.
2194 * Alpha, SPARC, and IA-64 now also using floating stacks.
2196 * Startup time of internationalized applications greatly improved through
2197 iconv cache. Use iconvconfig to generate the cache file.
2198 Contributed by Ulrich Drepper.
2200 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2201 severe performance problems. Patch by David Mosberger.
2203 * The Hurd port got a lot more functionality like AIO, various stdio
2204 extensions, etc. Mainly done by Roland McGrath.
2206 * mtrace can now lookup symbols in shared libraries.
2210 * Intel's IA-64 math library is largely integrated. It provides fast and
2211 accurate implementatations for most basic and standard math functions
2212 in float, double, and long double format.
2214 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2215 and asin for the 96-bit long double format and asin, log, tan for the
2216 128-bit long double format.
2218 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2219 The basic double functions exist today. Contributed by Abraham Ziv
2220 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2221 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2223 * An asynchronous name lookup library was added. The interface is designed
2224 after POSIX AIO. The proposal was circulated beforehand to get comments.
2225 No negative ones came in. Implemented by Ulrich Drepper.
2227 * Port to S390/64bit contributed by Martin Schwidefsky
2228 <schwidefsky@de.ibm.com>.
2230 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2231 of functions for Linux/IA-64.
2233 * The RPC code is now thread safe. Threads can now use the same service
2234 of different services at the same time. Patch by Eric Norum
2235 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2237 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2238 family of functions for Linux/S390.
2240 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2241 of functions for Linux/x86.
2243 * Port to Linux/CRIS contributed by Axis Communications.
2247 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2248 we can now check for namespace violations and missing declarations. The
2249 result is that almost all headers are now Unix-compliant (as defined in
2250 the upcoming XPG6). The negative side is that some programs might need
2251 corrections, too, if they depend on the incorrect form of the headers in
2252 previous versions which defined too many symbols and included too many
2255 * regex now handles multibyte character sets correctly.
2256 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2258 * iconv (the program) does now conform to the upcoming XPG6 and handles
2259 charmaps. Instead of the charset names the path of charmaps can be
2260 provided and the conversion happens based on this data.
2261 Contributed by Ulrich Drepper.
2263 * The locale program now provides detailed information about the installed
2268 only lists the names of the supported locales
2272 provides details such as country, language, and codeset name.
2273 Contributed by Ulrich Drepper.
2277 * The gencat program now parses the input file according to the charset
2278 selected by the LC_CTYPE category. This is important for stateful
2279 character sets. To make generating catalogs easier there is a way
2280 to overwrite the charset selected by the locale: before the first
2281 message or $ quote line the catalog can contain a line like
2283 $ codeset=ISO-8859-2
2285 to select the charset (ISO-8859-2 in this case).
2287 Implemented by Shinya Hanataka and Ulrich Drepper.
2289 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2290 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2291 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2293 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2294 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2296 * The LANGUAGE environment variable is now ignored unless the locale is
2297 changed from the default "C" locale.
2299 * The usual bug fixes.
2303 * Greg McGary added runtime support for bounds checking using gcc's
2304 new -fbounded-pointers option. ix86 target is complete. PowerPC
2307 * Thorsten Kukuk added secure mode support to nscd.
2309 * The Berkeley db libraries have been removed.
2311 Related, the nss_db module is now in a separate package since it
2312 obviously requires a database library being available.
2314 * Wide character I/O streams implemented by Ulrich Drepper.
2316 * Functions from the extended socket API added by Ulrich Drepper.
2318 * Functions feenableexcept and fedisableexcept to control the
2319 behaviour of individual exceptions have been added by Andreas Jaeger.
2321 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2323 * The resolver code has been updated from bind 8.2.3-T5B which supports
2324 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2327 This change could in some situations effect backward compatibility. Since
2328 now `_res' is a thread-local instead of a global variable, modifying it
2329 in one thread does not have any effect in other threads.
2331 The resolver library was also extended to allow IPv6 as the transport
2332 protocol for the requests. This work was done by Stig Venaas.
2334 * Compatibility code for K&R C compilers has been removed from the
2335 header files. A ISO C compiler is needed to use the library
2336 (conforming to either C89 or C99 standard).
2338 * Complete rewrite of the localedef program to support multibyte character
2339 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2340 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2341 Implemented by Ulrich Drepper.
2343 Bruno Haible significantly improved the generation and use of the data
2344 structures for the wide character tables.
2346 * Plural handling in gettext implemented by Ulrich Drepper.
2348 * The utmp daemon has been removed.
2350 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2352 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2355 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2357 * POSIX barriers implemented by Kaz Kylheku.
2359 * POSIX spawn function family implemented by Ulrich Drepper.
2361 * POSIX spinlocks are now available.
2363 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2365 * the configure option --enable-kernel=X.Y.Z allows to strip out
2366 compatibility for kernel versions before X.Y.Z. This is currently only
2367 implemented for Linux.
2369 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2370 field sin6_scope_id. This means that all programs using IPv6 should be
2371 recompiled. Don't expect binary compatibility with previous glibc
2374 * various conversion modules for IBM character sets contributed by
2377 * IA-64 port by Jes Sorensen and HJ Lu.
2391 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2393 * New xdr functions are added; some rpc functions are now 64bit clean.
2395 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2397 * Fixed known incompatibilities with glibc 2.0.
2399 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2401 * Optimized a number of functions (especially the ELF dynamic loader).
2403 * Update timezone data files.
2405 * lots of charmaps corrections
2407 * some new locale definitions and charmaps
2412 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2413 conform to POSIX member type requirements. Symbol versions have been
2414 adjusted as needed within the library, and for direct use by applications,
2415 but there is potential for problems if third-party libraries use
2416 struct timeval as part of their interface. This does not present
2417 a problem for X and other "essential" system libraries.
2419 * An additional locale model to support C++ Standard Library locale
2420 model and probably more was implemented by Ulrich Drepper.
2422 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2425 * Miles Bader provided the `argp' function family to support hierachical
2426 command line argument parsing, layered on top of getopt.
2428 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2430 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2433 * scanf recognizes the %a and %A format for scanning floating point numbers.
2435 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2436 information and interfaces for the available integer types.
2438 * about 130 new math functions were added to implement the ISO C9x math
2441 * the new header <complex.h> contains definitions of the complex math
2442 functions from ISO C 9X.
2444 * the new header <tgmath.h> defines generic macros to use complex or
2445 real valued functions.
2447 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2449 * Andreas Jaeger provided a test suite for the math library.
2451 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2453 * Ulrich Drepper added character set conversion functions (iconv).
2455 * Optimized string functions have been added.
2457 * The localedata addon is now part of glibc.
2459 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2461 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2462 daemon for NSS (nscd).
2464 Missing a better place here are some numbers on improvements. Under
2465 Linux 2.1.125 un-tar-ing the kernel sources takes
2469 using local files 12.19s 6.88s 22.91s
2471 using NIS 13.92s 8.91s 26.34s
2473 using NIS & nscd 10.37s 7.34s 25.30s
2475 using NIS+ 27.57s 30.37s 640.46s
2477 using NIS+ & nscd 10.25s 7.83s 26.51s
2479 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2481 Keep in mind that non-namelookup related operations dominate above times.
2482 It was just a common complain that using NIS+ unpacking the kernel is
2485 [1] The old nscd implementation is not available anymore since it was
2486 distributed with glibc up to version 2.0.98 and thus is now replaced.
2488 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2490 * Mark Kettenis provided a Hesiod NSS module.
2492 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2493 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2495 * rcmd can now handle netgroups (Dick Streefland).
2497 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2500 * Support for the IPv6 protocol has been added to the socket API, as per the
2501 latest draft standards.
2503 * Support for Linux 2.2 has been added.
2505 * Interface changes relative to the latest 2.0.x release:
2506 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2507 addseverity NEW: Unix98
2508 alphasort64 NEW: LFS
2509 argp_err_exit_status NEW: argp, GNU ext
2510 argp_error NEW: argp, GNU ext
2511 argp_failure NEW: argp, GNU ext
2512 argp_help NEW: argp, GNU ext
2513 argp_parse NEW: argp, GNU ext
2514 argp_program_bug_address NEW: argp, GNU ext
2515 argp_program_version NEW: argp, GNU ext
2516 argp_program_version_hook NEW: argp, GNU ext
2517 argp_state_help NEW: argp, GNU ext
2518 argp_usage NEW: argp, GNU ext
2519 authdes_create NEW: Secure RPC
2520 authdes_getucred NEW: Secure RPC
2521 authdes_pk_create NEW: Secure RPC
2522 backtrace NEW: GNU ext.
2523 backtrace_symbols NEW: GNU ext.
2524 backtrace_symbols_fd NEW: GNU ext.
2526 cacosf NEW: ISO C 9x
2527 cacosh NEW: ISO C 9x
2528 cacoshf NEW: ISO C 9x
2529 cacoshl NEW: ISO C 9x
2530 cacosl NEW: ISO C 9x
2537 casinf NEW: ISO C 9x
2538 casinh NEW: ISO C 9x
2539 casinhf NEW: ISO C 9x
2540 casinhl NEW: ISO C 9x
2541 casinl NEW: ISO C 9x
2543 catanf NEW: ISO C 9x
2544 catanh NEW: ISO C 9x
2545 catanhf NEW: ISO C 9x
2546 catanhl NEW: ISO C 9x
2547 catanl NEW: ISO C 9x
2548 cbc_crypt NEW: Secure RPC
2552 ccoshf NEW: ISO C 9x
2553 ccoshl NEW: ISO C 9x
2559 cimagf NEW: ISO C 9x
2560 cimagl NEW: ISO C 9x
2561 clearerr_locked REMOVED
2562 clntunix_create NEW: sunrpc ext
2564 clog10 NEW: ISO C 9x
2565 clog10f NEW: ISO C 9x
2566 clog10l NEW: ISO C 9x
2576 cprojf NEW: ISO C 9x
2577 cprojl NEW: ISO C 9x
2579 crealf NEW: ISO C 9x
2580 creall NEW: ISO C 9x
2585 csinhf NEW: ISO C 9x
2586 csinhl NEW: ISO C 9x
2589 csqrtf NEW: ISO C 9x
2590 csqrtl NEW: ISO C 9x
2594 ctanhf NEW: ISO C 9x
2595 ctanhl NEW: ISO C 9x
2597 des_setparity NEW: Secure RPC
2598 ecb_crypt NEW: Secure RPC
2599 endutxent NEW: Unix98
2601 exp10f NEW: ISO C 9x
2602 exp10l NEW: ISO C 9x
2606 fattach NEW: STREAMS
2607 fdetach NEW: STREAMS
2611 feclearexcept NEW: ISO C 9x
2612 fegetenv NEW: ISO C 9x
2613 fegetexceptflag NEW: ISO C 9x
2614 fegetround NEW: ISO C 9x
2615 feholdexcept NEW: ISO C 9x
2617 feraiseexcept NEW: ISO C 9x
2618 ferror_locked REMOVED
2619 fesetenv NEW: ISO C 9x
2620 fesetexceptflag NEW: ISO C 9x
2621 fesetround NEW: ISO C 9x
2622 fetestexcept NEW: ISO C 9x
2623 feupdateenv NEW: ISO C 9x
2624 fflush_locked REMOVED
2628 fgets_unlocked NEW: GNU ext.
2629 fileno_locked REMOVED
2641 fputc_locked REMOVED
2642 fputs_unlocked NEW: GNU ext.
2643 fread_unlocked NEW: GNU ext.
2648 fstatvfs NEW: Unix98
2652 ftruncate64 NEW: LFS
2654 fwrite_unlocked NEW: GNU ext.
2655 gai_strerror NEW: IPv6
2659 getchar_locked REMOVED
2661 getdate_err NEW: Unix98
2662 getdate_r NEW: GNU ext.
2664 getnameinfo NEW: IPv6
2665 getnetname NEW: Secure RPC
2666 getpmsg NEW: STREAMS
2667 getpt NEW: Unix98 PTY
2668 getrlimit64 NEW: LFS
2669 getutxent NEW: Unix98
2670 getutxid NEW: Unix98
2671 getutxline NEW: Unix98
2672 glob64 NEW: GNU ext.
2673 globfree64 NEW: GNU ext.
2674 gnu_get_libc_release NEW: GNU ext.
2675 gnu_get_libc_version NEW: GNU ext.
2676 grantpt NEW: Unix98 PTY
2677 host2netname NEW: Secure RPC
2679 iconv_close NEW: iconv
2680 iconv_open NEW: iconv
2681 if_freenameindex NEW: IPv6
2682 if_indextoname NEW: IPv6
2683 if_nameindex NEW: IPv6
2684 if_nametoindex NEW: IPv6
2685 in6addr_any NEW: IPv6
2686 in6addr_loopback NEW: IPv6
2687 inet6_isipv4mapped NEW: IPv6
2688 isastream NEW: STREAMS
2689 iswblank NEW: GNU ext.
2690 key_decryptsession NEW: Secure RPC
2691 key_decryptsession_pk NEW: Secure RPC
2692 key_encryptsession NEW: Secure RPC
2693 key_encryptsession_pk NEW: Secure RPC
2694 key_gendes NEW: Secure RPC
2695 key_get_conv NEW: Secure RPC
2696 key_secretkey_is_set NEW: Secure RPC
2697 key_setnet NEW: Secure RPC
2698 key_setsecret NEW: Secure RPC
2699 llrint NEW: ISO C 9x
2700 llrintf NEW: ISO C 9x
2701 llrintl NEW: ISO C 9x
2702 llround NEW: ISO C 9x
2703 llroundf NEW: ISO C 9x
2704 llroundl NEW: ISO C 9x
2709 lrintf NEW: ISO C 9x
2710 lrintl NEW: ISO C 9x
2711 lround NEW: ISO C 9x
2712 lroundf NEW: ISO C 9x
2713 lroundl NEW: ISO C 9x
2715 makecontext NEW: Unix98
2716 mempcpy NEW: GNU ext.
2719 modify_ldt NEW: kernel
2723 nearbyint NEW: ISO C 9x
2724 nearbyintf NEW: ISO C 9x
2725 nearbyintl NEW: ISO C 9x
2726 netname2host NEW: Secure RPC
2727 netname2user NEW: Secure RPC
2728 nexttoward NEW: ISO C 9x
2729 nexttowardf NEW: ISO C 9x
2730 nexttowardl NEW: ISO C 9x
2734 passwd2des NEW: Secure RPC
2736 pow10f NEW: GNU ext.
2737 pow10l NEW: GNU ext.
2740 printf_size NEW: GNU ext.
2741 printf_size_info NEW: GNU ext.
2742 profil_counter REMOVED
2743 pthread_mutexattr_getkind_np REPLACED
2744 pthread_mutexattr_setkind_np REPLACED
2745 ptsname NEW: Unix98 PTY
2746 ptsname_r NEW: Unix98 PTY
2748 putchar_locked REMOVED
2749 putgrent NEW: GNU ext.
2751 putpmsg NEW: STREAMS
2752 pututxline NEW: Unix98
2756 readdir64_r NEW: LFS
2757 remquo NEW: ISO C 9x
2758 remquof NEW: ISO C 9x
2759 remquol NEW: ISO C 9x
2761 roundf NEW: ISO C 9x
2762 roundl NEW: ISO C 9x
2764 scalbln NEW: ISO C 9x
2765 scalblnf NEW: ISO C 9x
2766 scalblnl NEW: ISO C 9x
2768 sendfile NEW: kernel
2769 setcontext NEW: Unix98
2770 setrlimit64 NEW: LFS
2771 setutxent NEW: Unix98
2773 sigignore NEW: Unix98
2774 sigqueue NEW: POSIX.1b
2775 sigrelse NEW: Unix98
2776 sigset NEW: POSIX.1b
2777 sigtimedwait NEW: POSIX.1b
2778 sigwaitinfo NEW: POSIX.1b
2779 sincos NEW: GNU ext.
2780 sincosf NEW: GNU ext.
2781 sincosl NEW: GNU ext.
2785 strcasestr NEW: GNU ext.
2786 strtoimax NEW: ISO C 9x
2787 strtoumax NEW: ISO C 9x
2788 strverscmp NEW: GNU ext.
2789 svcauthdes_stats NEW: Secure RPC
2790 svcunix_create NEW: sunrpc etx
2791 svcunixfd_create NEW: sunrpc ext
2792 swapcontext NEW: Unix98
2793 tcgetsid NEW: Unix98 PTY
2794 tdestroy NEW: GNU ext.
2795 tgamma NEW: ISO C 9x
2796 tgammaf NEW: ISO C 9x
2797 tgammal NEW: ISO C 9x
2801 truncf NEW: ISO C 9x
2802 truncl NEW: ISO C 9x
2804 unlockpt NEW: Unix98 PTY
2805 updwtmpx NEW: Unix98
2806 user2netname NEW: Secure RPC
2807 utmpxname NEW: Unix98
2808 versionsort NEW: GNU ext.
2809 versionsort64 NEW: GNU ext.
2811 wcscasecmp NEW: GNU ext.
2812 wcsncasecmp NEW: GNU ext.
2813 wcsnlen NEW: GNU ext.
2814 wcstoimax NEW: ISO C 9x
2815 wcstoll NEW: ISO C 9x
2816 wcstoull NEW: ISO C 9x
2817 wcstoumax NEW: ISO C 9x
2819 wordexp NEW: POSIX.2
2820 wordfree NEW: POSIX.2
2821 write_profiling REMOVED
2822 xdecrypt NEW: Secure RPC
2823 xdr_authdes_cred NEW: Secure RPC
2824 xdr_authdes_verf NEW: Secure RPC
2825 xdr_cryptkeyarg NEW: Secure RPC
2826 xdr_cryptkeyarg2 NEW: Secure RPC
2827 xdr_cryptkeyres NEW: Secure RPC
2828 xdr_getcredres NEW: Secure RPC
2829 xdr_key_netstarg NEW: Secure RPC
2830 xdr_key_netstres NEW: Secure RPC
2831 xdr_keybuf NEW: Secure RPC
2832 xdr_keystatus NEW: Secure RPC
2833 xdr_netnamestr NEW: Secure RPC
2834 xdr_sizeof NEW: Secure RPC
2835 xdr_unixcred NEW: sunrpc ext
2836 xencrypt NEW: Secure RPC
2837 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2848 * inet_ntoa is thread-safe
2850 * updwtmp is moved from libutil to libc
2852 * rewrite of cbrt function
2854 * update of timezone data
2868 * add atoll function
2870 * fix complex problems in Berkeley DB code
2872 * fix math functions
2876 * fixed lots of header problems (especially Linux/GNU specific)
2878 * dynamic loader preserves all registers
2880 * Roland McGrath provided support for handling of auxiliary objects in
2881 the ELF dynamic loader.
2883 * support for parallel builds is improved
2887 * GNU extensions are no longer declared by default. To enable them you
2888 must define the macro `_GNU_SOURCE' in your program or compile with
2891 * The library has changed from using GNU ld symbol aliases to using weak
2892 symbols where available. The ELF object file format supports weak
2893 symbols; GNU ld also supports weak symbols in the a.out format. (There
2894 is also now support for other GNU ld extensions in ELF. Use the
2895 `--with-elf' option to configure to indicate you have ELF, and
2896 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2897 of many files which contained only symbol aliases, reducing the size of
2898 the source and the compiled library; many other files were renamed to
2899 less cryptic names previously occupied by the symbol alias files.
2900 There is a new header file <elf.h> for programs which operate on
2901 files in the ELF format.
2903 * Converted to Autoconf version 2, so `configure' has more options.
2904 Run `configure --help' to see the details.
2906 * The library can now be configured to build profiling, highly-optimized
2907 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2908 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2909 `configure' enable building these extra libraries. The shared library is
2910 built by default when using both ELF and GNU ld. When shared libraries
2911 are enabled, the new library `-ldl' is available for arbitrary run-time
2912 loading of shared objects; its interface is defined in <dlfcn.h>. The
2913 new header file <link.h> gives access to the internals of the run-time
2914 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2915 application of same name on other systems and it provides information
2916 about dynamically linked binaries.
2918 * The C library now provides the run-time support code for profiling
2919 executables compiled with `-pg'. Programs can control the profiling code
2920 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2921 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2922 the support for this file format was contributed by David Mosberger-Tang.
2924 * The math code has been replaced with a math library based on fdlibm from
2925 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2926 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2927 functions. The math functions now reside in a separate library, so
2928 programs using them will need to use `-lm' their linking commands.
2930 * John C. Bowman contributed optimized ix87 assembler inline functions.
2932 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2933 mechanism similar to that found in Solaris 2. This is now used for the
2934 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2935 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2936 file controls what services are used for each individual database. This
2937 works by loading shared libraries with names specified in `nsswitch.conf',
2938 so service modules can be changed or added at any time without even
2939 relinking any program. Currently there are the file, db, and NIS based
2940 NSS services available.
2942 * The new functions `strtoq' and `strtouq' parse integer values from
2943 strings, like `strtol' and `strtoul', but they return `long long int' and
2944 `unsigned long long int' values, respectively (64-bit quantities).
2946 * The new functions `strtof' and `strtold' parse floating-point values from
2947 strings, like `strtod', but they return `float' and `long double' values,
2948 respectively (on some machines `double' and `long double' are the same).
2950 * Ulrich Drepper has contributed new implementations of the floating-point
2951 printing and reading code used in the `printf' family of functions and
2952 `strtod', `strtof', and `strtold'. These new functions are perfectly
2953 accurate, and much faster than the old ones.
2955 * The implementation of the POSIX locale model was completely rewritten by
2956 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2957 to compile the POSIX locale definition.
2959 * The former dummy implementations of the strcoll and strxfrm function are
2960 now replaced by fully functional code contributed by Ulrich Drepper. The
2961 collation information comes from the POSIX locale definitions.
2963 * The new header <langinfo.h> defines an interface for accessing
2964 various locale-dependent data (using the locale chosen with `setlocale').
2966 * Ulrich Drepper has contributed a new suite of functions for operation on
2967 wide-character and multibyte-character strings, in <wchar.h>;
2968 and classification and case conversion of wide characters, in <wctype.h>.
2969 These new functions are conforming to the ISO C, Amendement 1 specification.
2971 * There is now a second implementation of the standard I/O library available.
2972 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2973 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2975 * You can now use positional parameter specifications in format strings
2976 for the `printf' and `scanf' families of functions. For example,
2977 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2978 ``Number 6, Mr Jones''. This is mainly useful when providing different
2979 format strings for different languages, whose grammars may dictate
2980 different orderings of the values being printed. To support this
2981 feature, the interface for `register_printf_handler' has changed; see
2982 the header file <printf.h> for details.
2984 * The `printf' and `scanf' families of functions now understand a new
2985 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2986 to group numbers as indicated by the locale; for `scanf' and friends, this
2987 says to accept as valid only a number with all the proper grouping
2988 separators in the right places. In the default "C" locale, numbers are
2989 not grouped; but locales for specific countries will define the usual
2990 conventions (i.e. separate thousands with `,' in the US locale).
2992 * The pgrp functions have been regularized, slightly incompatibly but much
2993 less confusingly. The core functions are now `getpgid' and `setpgid',
2994 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2995 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2996 provided for compatibility. There is no longer an incompatible `getpgrp'
2997 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2999 * The new header file <fts.h> and suite of functions simplify programs that
3000 operate on directory trees. This code comes from 4.4 BSD.
3002 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3003 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3004 NSS scheme used in glibc.
3006 * There is a new malloc debugging hook `__memalign_hook'.
3008 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3009 `unsigned int' in <sys/types.h>. These are for compatibility only and
3010 their use is discouraged.
3012 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3013 done differently, so that it works even without GNU ld.
3015 * New function `euidaccess' checks allowed access to a file like `access',
3016 but using the effective IDs instead of the real IDs.
3018 * The time zone data files have been updated for the latest and greatest
3019 local time conventions of the countries of the world.
3021 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3024 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3025 for formatting floating-point numbers. They are provided only for
3026 compatibility; new programs should use `sprintf' instead. There are
3027 also equivalent function for the `long double' floating-point type and
3028 all functions also exist in a reentrant form.
3030 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3031 functions for maintaining the login-record files (primarily of use to
3032 system programs such as `login'), and convenient functions for
3033 allocating and initializing a pseudo-terminal (pty) device.
3035 * Ulrich Drepper has contributed new support for System V style
3036 shared memory and IPC on systems that support it.
3038 * Ulrich Drepper has contributed several miscellaneous new functions found
3039 in System V: The `hsearch' family of functions provide an effective
3040 implementation of hash tables; `a64l' and `l64a' provide a very simple
3041 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3044 * Ulrich Drepper has contributed new reentrant counterparts for the
3045 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3047 * Ulrich Drepper has contributed new, highly-optimized versions of several
3048 string functions for the i486/Pentium family of processors.
3050 * Ulrich Drepper has updated the Linux-specific code, based largely
3051 on work done in Hongjiu Lu's version of GNU libc for Linux.
3052 The GNU library now supports Linux versions 2.0.10 and later,
3053 using the ELF object file format (i[3456]86-*-linux).
3055 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3057 * David Mosberger-Tang and Richard Henderson have ported the C library
3058 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3059 dynamic linking support for ELF/Alpha.
3061 * Richard Henderson contributed several Alpha optimized assembler function
3062 for arithmetic and string handling.
3064 * Ulrich Drepper has contributed a new set of message catalog functions to
3065 support multiple languages using the <libintl.h> interface, for use with
3066 his new package GNU gettext. Translation volunteers have contributed
3067 catalogs of the library's messages in Spanish, German, and Korean.
3069 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3070 program and the `catgets' function for reading the catalog files it
3071 creates. (The <libintl.h> interface is preferred; we include the
3072 <nl_types.h> interface using `catgets' only for source compatibility with
3073 programs already written to use it.)
3075 * New header file <values.h> gives SVID-compatible names for <limits.h>
3078 * Various new macros, declarations, and small header files for compatibility
3081 * New function `group_member' is a convenient way to check if a process has
3082 a given effective group ID.
3084 * When using GCC 2.7 and later, the socket functions are now declared in a
3085 special way so that passing an argument of type `struct sockaddr_in *',
3086 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3087 `struct sockaddr *' type, does not generate a type-clash warning.
3089 * New function `error' declared in header file <error.h> is a convenient
3090 function for printing error messages and optionally exiting; this is the
3091 canonical function used in GNU programs. The new functions `err', `warn',
3092 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3093 doing the same thing.
3095 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3096 POSIX.2 `glob' function to do ~ and {...} expansion.
3098 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3099 `clearenv' which is used in POSIX.9 is also available.
3101 * New function `getsid' returns session ID number on systems that support it.
3103 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3104 files <db.h> and <mpool.h> provide a rich set of functions for several
3105 types of simple databases stored in memory and in files, and <ndbm.h> is
3106 an old `ndbm'-compatible interface using the `db' functions. Link with
3107 `-ldb' to get these functions.
3109 * New macro `strdupa' copies a string like `strdup', but uses local stack
3110 space from `alloca' instead of dynamic heap space from `malloc'.
3112 * New function `strnlen' is like `strlen' but searches only a given maximum
3113 number of characters for the null terminator. `stpncpy', `strndup' and
3114 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3117 * New function `statfs' in header <sys/statfs.h>.
3119 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3120 provide convenient functions for operating on blocks of null-terminated
3123 * A new suite of functions in <utmp.h> handle all the details of reading
3124 and writing the utmp file.
3126 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3129 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3130 completely POSIX compliant and also implemented the extended functionality
3131 to handle alternate digit representation and alternate era date formats.
3133 * Ulrich Drepper provided an implementation of the `strptime' function
3134 defined in XPG4.2 which transforms a string into a `struct tm' value.
3136 * Paul Eggert provided the tzselect shell script as part of the timezone
3137 code. The shell script makes it easy to select the correct timezone
3140 * The implementation of the malloc family of functions is completely replaced
3141 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3142 The implementation uses the mmap function (if available) and it is
3143 optimized for the use in multi threaded programs.
3145 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3146 functions. This new functionality is usable by specifying a special
3147 salt string and it is compatible with implementation on *BSD systems.
3149 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3150 `getsubopt' to handle second level command line options, `bsd_signal'
3151 to access BSD style `signal' functionality, the obsolete `regexp' style
3154 * the `lchown' function is available on system which support this
3157 * The implementation of the shadow password handling function was contributed
3160 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3162 * POSIX.1g support was added. The <sys/select.h> header is available,
3163 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3164 implementation of `getaddrinfo'.
3168 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3170 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3171 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3173 * The new function `daemon' from 4.4 BSD is useful for server programs that
3174 want to put themselves in the background.
3176 * Joel Sherrill has contributed support for several standalone boards that
3177 run without an operating system.
3179 * `printf', `scanf' and friends now accept a `q' type modifier for long
3180 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3182 * All of the code taken from BSD (notably most of the math and networking
3183 routines) has been updated from the BSD 4.4-Lite release.
3185 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3187 * The new functions `getdomainname' and `setdomainname' fetch or change the
3188 YP/NIS domain name. These are system calls which exist on systems which
3191 * The time zone data files have been updated for the latest international
3194 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3195 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3199 * The C library now includes support for Sun RPC, from Sun's free
3200 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3201 are included. (There is still no support for YP.)
3203 * Tom Quinn has contributed a port of the C library to SGI machines running
3204 Irix 4 (mips-sgi-irix4).
3206 * The new `lockf' function is a simplified interface to the locking
3207 facilities of `fcntl', included for compatibility.
3209 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3211 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3213 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3216 * The error message printed by `assert' for a failed assertion now includes
3217 the name of the program (if using GNU ld) and the name of the calling
3218 function (with versions of GCC that support this).
3220 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3222 * The library now includes the <sys/mman.h> header file and memory
3223 management functions `mmap', `munmap', `mprotect', `msync', and
3224 `madvise', on systems that support those facilities.
3226 * The interface for `mcheck' has changed slightly: the function called to
3227 abort the program when an allocation inconsistency is detected now takes
3228 an argument that indicates the type of failure. The new function
3229 `mprobe' lets you request a consistency check for a particular block at
3230 any time (checks are normally done only when you call `free' or `realloc'
3233 * It is now possible to easily cross-compile the C library, building on one
3234 system a library to run on another machine and/or operating system. All
3235 you need to do is set the variable `HOST_CC' in `configparms' to the
3236 native compiler for programs to run on the machine you are building on (a
3237 few generator programs are used on Unix systems); set `CC' to the
3240 * The new function `fexecve' (only implemented on the GNU system) executes
3241 a program file given a file descriptor already open on the file.
3245 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3246 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3248 * You can set the variable `libprefix' in `configparms' to specify a prefix
3249 to be prepended to installed library files; this makes it easy to install
3250 the GNU C library to be linked as `-lgnuc' or whatever.
3252 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3253 copies a limited number of characters from a string, and returns the
3254 address of the last character written.
3256 * You no longer need to check for whether the installed `stddef.h' is
3257 compatible with the GNU C library. configure now checks for you.
3259 * You can now define a per-stream `fileno' function to convert the
3260 stream's cookie into an integral file descriptor.
3262 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3263 allocates zero bytes of storage, and returns a unique pointer which
3264 you can pass to `realloc' or `free'. The behavior is undefined if
3265 you dereference this pointer.
3267 * The C library now runs on Sony NEWS m68k machines running either
3268 NewsOS 3 or NewsOS 4.
3270 * The new `syscall' function is a system-dependent primitive function
3271 for invoking system calls. It has the canonical behavior on Unix
3272 systems, including unreliable return values for some calls (such as
3273 `pipe', `fork' and `getppid').
3275 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3276 to `EAGAIN', which is the preferred name. On systems whose kernels
3277 use two distinct codes, the C library now translates EWOULDBLOCK to
3278 EAGAIN in every system call function.
3282 * The GNU C Library Reference Manual is now distributed with the library.
3283 `make dvi' will produce a DVI file of the printed manual.
3284 `make info' will produce Info files that you can read on line using C-h i
3285 in Emacs or the `info' program.
3286 Please send comments on the manual to bug-glibc-manual@gnu.org.
3288 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3290 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3292 * Jason Merrill has contributed a port to the Sequent Symmetry running
3293 Dynix version 3 (i386-sequent-dynix).
3295 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3296 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3298 * New function `memory_warnings' lets you arrange to get warnings when
3299 malloc is running out of memory to allocate, like Emacs gives you.
3301 * The C library now contains the relocating allocator used in Emacs 19 for
3302 its editing buffers. This allocator (ralloc) minimizes allocation
3303 overhead and fragmentation by moving allocated regions around whenever it
3304 needs to. You always refer to a ralloc'd region with a "handle" (a
3305 pointer to a pointer--an object of type `void **').
3307 * There is a new `printf' format: `%m' gives you the string corresponding
3308 to the error code in `errno'.
3310 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3311 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3312 pass, the `a' modifier says to fill in a `char **' you pass with a
3315 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3316 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3317 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3319 * `mkstemp' is a traditional Unix function to atomically create and open a
3320 uniquely-named temporary file.
3324 * The standard location for the file that says what the local timezone is
3325 has changed again. It is now `/usr/local/etc/localtime' (or more
3326 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3328 * The distribution no longer contains any files with names longer than 14
3331 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3332 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3334 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3338 * The configuration process has changed quite a bit. The `configure'
3339 script is now used just like the configuration scripts for other GNU
3340 packages. The `sysdeps' directory hierarchy is much rearranged.
3341 The file `INSTALL' explains the new scheme in detail.
3343 * The header files no longer need to be processed into ANSI C and
3344 traditional C versions. There is just one set of files to install, and
3345 it will work with ANSI or old C compilers (including `gcc -traditional').
3347 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3348 MIPS DECStation running Ultrix 4.
3350 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3351 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3352 made itself into a shared library.
3354 * Yet further improved support for the i386, running 4.3 BSD-like systems
3355 (such as Mach 3 with the Unix single-server), or System V.
3357 * New function `strncasecmp' to do case-insensitive string comparison
3358 with limited length.
3360 * New function `strsep' is a reentrant alternative to `strtok'.
3362 * New functions `scandir' and `alphasort' for searching directories.
3364 * New function `setenv' is a better interface to `putenv'.
3366 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3367 function for traversing a directory tree.
3369 * The GNU obstack package is now also part of the C library.
3370 The new function `open_obstack_stream' creates a stdio stream that
3371 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3372 formatted output directly to an obstack.
3374 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3375 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3377 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3379 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3380 things to your strings.
3382 * There are some new test programs: test-fseek, testmb, and testrand.
3384 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3385 These ports are not finished, but are a good starting place for really
3386 supporting those systems.
3388 * `/etc/localtime' is now the standard location for the file that says what
3389 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3390 This follows the general principle that `/etc' is the place for all local
3391 configuration files.
3393 * The C library header files now use `extern "C"' when used by the C++
3394 compiler, so the C library should now work with C++ code.
3396 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3397 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3400 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3401 function which uses the `merge sort' algorithm, and is said to be
3402 significantly faster than the old GNU `qsort' function. Merge sort is
3403 now the standard `qsort' function. The new algorithm can require a lot
3404 of temporary storage; so, the old sorting function is called when the
3405 required storage is not available.
3407 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3408 provides the Unix `crypt' function, plus some other entry points.
3410 * The code and header files taken from 4.4 BSD have been updated with the
3411 latest files released from Berkeley.
3413 ----------------------------------------------------------------------
3414 Copyright information:
3416 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3418 Permission is granted to anyone to make or distribute verbatim copies
3419 of this document as received, in any medium, provided that the
3420 copyright notice and this permission notice are preserved,
3421 thus giving the recipient permission to redistribute in turn.
3423 Permission is granted to distribute modified versions
3424 of this document, or of portions of it,
3425 under the above conditions, provided also that they
3426 carry prominent notices stating who last changed them.
3429 version-control: never