1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2017 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 * Unicode 9.0.0 Support: Character encoding, character type info, and
11 transliteration tables are all updated to Unicode 9.0.0, using
12 generator scripts contributed by Mike FABIAN (Red Hat).
14 * errno.h is now safe to use from C-preprocessed assembly language on all
15 supported operating systems. In this context, it will only define the
16 Exxxx constants, as preprocessor macros expanding to integer literals.
18 * The rpcgen, librpcsvc and related headers will only be built and
19 installed when glibc is configured with --enable-obsolete-rpc.
20 This allows alternative RPC implementations, like TIRPC, to be used
21 by default. Applications needing features missing from TIRPC should
22 consider the rpcsvc-proto project developed by Thorsten Kukuk (SUSE).
24 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
25 libnss_compat, are deprecated, and will not be built or installed by
26 default. Replacement implementations based on TIRPC, which
27 additionally support IPv6, are available from
28 <https://github.com/thkukuk/libnss_{compat,nis,nisplus}>.
30 * The NIS(+) support library, libnsl, is deprecated. By default, a
31 compatibility shared library will be built and installed, but not
32 headers or development libraries.
34 Only a few NIS-related programs require this library.
35 A replacement implementation based on TIRPC is available from
36 <https://github.com/thkukuk/libnsl>. Like the replacement NIS(+)
37 name service modules, the replacement supports IPv6, and it can be
38 coinstalled with the compatibility shared library from glibc.
40 * New configure option --enable-obsolete-nsl will cause libnsl's
41 headers, and the NIS(+) name service modules, to be built and
42 installed. This option may be removed in a future release.
44 * Extensive new collation tests for Hungarian locales based on
45 "The Rules of Hungarian Orthography, 12th edition" and the work of
46 Egmont Koblinger (Bug 18934).
48 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
49 support is enabled, the configured recursive resolver must support EDNS.
50 (Responding to EDNS-enabled queries with responses which are not
51 EDNS-enabled is fine, but FORMERR responses are not.)
53 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
54 servers have not supported this opcode for a long time.
56 * The legacy cfree function has been removed. Applications should use the
57 free function instead.
59 * posix_spawnattr_setflags now supports POSIX_SPAWN_SETSID flag to create a
60 new session ID for the posix_spawn and posix_spawnp. It is scheduled to
61 be added on next major revision of POSIX, so current support is enabled
64 * The minimum Linux kernel version that this version of the GNU C Library
65 can be used with on i[4567]86 and x86_64 is 3.2. A Linux 3.2 or later
66 kernel was already required on all other architectures.
68 * The obsolete <sys/ultrasound.h> header file has been removed.
70 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
73 * The reallocarray function has been added to libc. It is a realloc
74 replacement with a check for integer overflow when calculating total
77 * New preadv2 and pwritev2 has been added. They are Linux extensions to
78 preadv and pwritev with an additional flag argument where it is possible
79 to set high priority or use O_DSYNC or O_SYNC for a specific IO operation.
80 For complete support it requires Linux kernel version 4.6, otherwise a
81 compat implementation will be used (which refuses all flags and routes it
82 to preadv or pwritev).
84 * The stack_t type no longer has the name struct sigaltstack. This changes
85 the C++ name mangling for interfaces involving this type.
87 * The synchronization that pthread_spin_unlock performs has been changed
88 to now be equivalent to a C11 atomic store with release memory order to
89 the spin lock's memory location. This ensures correct synchronization
90 for the spin lock's operations and critical sections protected by a spin
91 lock. Previously, several (but not all) architectures used stronger
92 synchronization (e.g., containing what is often called a full barrier).
93 This change can improve performance, but may affect odd fringe uses of
94 spin locks that depend on the previous behavior (e.g., using spin locks
95 as atomic variables to try to implement Dekker's mutual exclusion
98 * The tunables feature is now enabled by default. This allows users to tweak
99 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
101 Security related changes:
103 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
104 to avoid fragmentation-based spoofing attacks.
106 The following bugs are resolved with this release:
108 [The release manager will add the list generated by
109 scripts/list-fixed-bugs.py just before the release.]
114 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
115 24731-2:2010, is supported to enable declarations of functions from that
116 TR. Note that not all functions from that TR are supported by the GNU C
119 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
120 18661-1:2014, is supported to enable declarations of functions and macros
121 from that TS. Note that not all features from that TS are supported by
124 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
125 18661-4:2015, is supported to enable declarations of functions and macros
126 from that TS. Note that most features from that TS are not supported by
129 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
130 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
131 Since the GNU C Library defaults to a much newer revision of POSIX, this
132 will only affect programs that specifically request an old conformance
133 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
134 see a change in the visible declarations, but a program compiled with
135 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
138 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
139 defined by all multithreaded code, but glibc has not required this for
142 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
143 means that in a future release, the macros “major”, “minor”, and “makedev”
144 will only be available from <sys/sysmacros.h>.
146 These macros are not part of POSIX nor XSI, and their names frequently
147 collide with user code; see for instance glibc bug 19239 and Red Hat bug
148 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
149 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
152 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
153 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
154 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
156 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
157 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
158 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
159 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
160 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
161 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
162 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
163 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
164 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
165 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
166 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
169 * New <math.h> features are added from TS 18661-1:2014:
171 - Signaling NaN macros: SNANF, SNAN, SNANL.
173 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
174 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
175 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
177 - llogb functions: the llogb, llogbf and llogbl functions, and the
178 FP_LLOGB0 and FP_LLOGBNAN macros.
180 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
183 - Comparison macros: iseqsig.
185 - Classification macros: iscanonical, issubnormal, iszero.
187 - Total order functions: totalorder, totalorderf, totalorderl,
188 totalordermag, totalordermagf, totalordermagl.
190 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
192 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
193 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
195 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
196 are added to libc. They convert a floating-point number into string.
198 * Most of glibc can now be built with the stack smashing protector enabled.
199 It is recommended to build glibc with --enable-stack-protector=strong.
200 Implemented by Nick Alcock (Oracle).
202 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
203 intended to be used instead of memset() to erase sensitive data after use;
204 the compiler will not optimize out calls to explicit_bzero even if they
205 are "unnecessary" (in the sense that no _correct_ program can observe the
206 effects of the memory clear).
208 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
209 to float instead of double. This does not affect the ABI of any libraries
210 that are part of the GNU C Library, but may affect the ABI of other
211 libraries that use this type in their interfaces.
213 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
214 float_t and double_t types are now defined to long double instead of float
215 and double. These options are not the default, and this does not affect
216 the ABI of any libraries that are part of the GNU C Library, but it may
217 affect the ABI of other libraries that use this type in their interfaces,
218 if they are compiled or used with those options.
220 * The getentropy and getrandom functions, and the <sys/random.h> header file
223 * The buffer size for byte-oriented stdio streams is now limited to 8192
224 bytes by default. Previously, on Linux, the default buffer size on most
225 file systems was 4096 bytes (and thus remains unchanged), except on
226 network file systems, where the buffer size was unpredictable and could be
227 as large as several megabytes.
229 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
230 for the Linux quota interface which predates kernel version 2.4.22 has
233 * The malloc_get_state and malloc_set_state functions have been removed.
234 Already-existing binaries that dynamically link to these functions will
235 get a hidden implementation in which malloc_get_state is a stub. As far
236 as we know, these functions are used only by GNU Emacs and this change
237 will not adversely affect already-built Emacs executables. Any undumped
238 Emacs executables, which normally exist only during an Emacs build, should
239 be rebuilt by re-running “./configure; make” in the Emacs build tree.
241 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
242 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
243 “no-ip6-dotint” had already been the default, and support for the
244 “ip6-dotint” option was removed from the Internet in 2006.
246 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
247 flag from <resolv.h> have been removed. The option relied on a
248 backwards-incompatible DNS extension which was never deployed on the
251 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
252 RES_BLAST defined in the <resolv.h> header file have been deprecated.
253 They were already unimplemented.
255 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
256 _res.flags are deprecated. The flag was standardized in RFC 2133, but
257 removed again from the IETF name lookup interface specification in RFC
258 2553. Applications should use getaddrinfo instead.
260 * DNSSEC-related declarations and definitions have been removed from the
261 <arpa/nameser.h> header file, and libresolv will no longer attempt to
262 decode the data part of DNSSEC record types. Previous versions of glibc
263 only implemented minimal support for the previous version of DNSSEC, which
264 is incompatible with the currently deployed version.
266 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
267 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
268 <arpa/nameser.h> header file because the distinction between RR types and
269 meta-RR types is not officially standardized, subject to revision, and
270 thus not suitable for encoding in a macro.
272 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
273 and rhook members of the res_state type in <resolv.h> have been removed.
274 The glibc stub resolver did not support these hooks, but the header file
275 did not reflect that.
277 * For multi-arch support it is recommended to use a GCC which has
278 been built with support for GNU indirect functions. This ensures
279 that correct debugging information is generated for functions
280 selected by IFUNC resolvers. This support can either be enabled by
281 configuring GCC with '--enable-gnu-indirect-function', or by
282 enabling it by default by setting 'default_gnu_indirect_function'
283 variable for a particular architecture in the GCC source file
286 * GDB pretty printers have been added for mutex and condition variable
287 structures in POSIX Threads. When installed and loaded in gdb these pretty
288 printers show various pthread variables in human-readable form when read
289 using the 'print' or 'display' commands in gdb.
291 * Tunables feature added to allow tweaking of the runtime for an application
292 program. This feature can be enabled with the '--enable-tunables' configure
293 flag. The GNU C Library manual has details on usage and README.tunables has
294 instructions on adding new tunables to the library.
296 * A new version of condition variables functions have been implemented in
297 the NPTL implementation of POSIX Threads to provide stronger ordering
300 * A new version of pthread_rwlock functions have been implemented to use a more
301 scalable algorithm primarily through not using a critical section anymore to
304 Security related changes:
306 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
307 have been created with makecontext could fail to terminate due to a
308 missing .cantunwind annotation. This has been observed to lead to a hang
309 (denial of service) in some Go applications compiled with gccgo. Reported
310 by Andreas Schwab. (CVE-2016-6323)
312 * The DNS stub resolver functions would crash due to a NULL pointer
313 dereference when processing a query with a valid DNS question type which
314 was used internally in the implementation. The stub resolver now uses a
315 question type which is outside the range of valid question type values.
318 The following bugs are resolved with this release:
320 [4099] stdio: Overly agressive caching by stream i/o functions.
321 [7065] build: Support building glibc with -fstack-protector or -fstack-
323 [9842] localedata: en_CA: incorrect date format
324 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
325 before it started waiting
326 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
327 [15765] nptl: sem_open is wrongly a cancellation point
328 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
329 [16458] libc: endian.h and netinet/in.h byte order macros return values of
331 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
332 library linked with pthread
333 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
335 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
336 [17252] libc: getrandom and getentropy syscall
337 [17730] malloc: thread-local storage is sometimes improperly free()'d
338 after being __libc_memalign()'d
339 [18241] stdio: failed fseek on memstream does not set errno and can fail
341 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
343 [18463] nptl: pthread_cond_broadcast issue when surrounded by
344 PTHREAD_PRIO_INHERIT mutex on ARM
345 [18784] network: res_query and related function crash for special record
346 type queries (CVE-2015-5180)
347 [19380] math: strtod does not raise "inexact"
348 [19387] string: Integer overflow in memchr
349 [19390] string: Integer overflow in strncat
350 [19398] build: linknamespace tests fail with massively parallel build
351 [19402] nptl: Deadlock with robust shared mutex and asynchronous
353 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
354 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
355 [19514] libc: [PATCH] Fix spelling errors in spelling
356 "implement"/"implementation" in several places
357 [19582] network: Deprecate RES_USE_INET6
358 [19673] manual: clog10 docs appear to be erroneous
359 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
360 causes a segmentation fault
361 [19826] libc: invalid pointer returned from __tls_get_addr with static
363 [20016] network: resolv: Remove hooks support from the API
364 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
366 [20033] math: [x86_64] vectorized math function don't call the __finite
368 [20116] nptl: use after free in pthread_create
369 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
370 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
372 [20311] nptl: please install proc_service.h
373 [20366] libc: Compilation errors in installed headers in strict-compliance
375 [20370] malloc: malloc: Arena free list management is still racy
376 (incorrect fix in bug 19243)
377 [20386] libc: assert (X = 0) does not result in GCC warning
378 [20432] malloc: malloc: Minimize interface required for interposition
379 [20435] libc: Missing unwind info in __startcontext causes infinite loop
380 in _Unwind_Backtrace (CVE-2016-6323)
381 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
382 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
384 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
385 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
386 [20477] network: resolv: incorrect double-checked locking related to
388 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
390 [20495] math: x86_64 performance degradation due to AVX/SSE transition
392 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
393 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
394 cause transition penalty
395 [20517] math: sparcv9 missing fdiml compat symbol
396 [20524] manual: strverscmp is inconsistent
397 [20525] libc: <sys/quota.h> should be based on kernel headers
398 [20539] math: GCC 7 -static -lm fails to link at -O3
399 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
401 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
403 [20591] network: Remove obsolete DNSSEC support
404 [20592] network: DNS resource record type classification macros in
405 <arpa/nameser.h> are incorrect
406 [20593] network: Update DNS RR type definitions
407 [20611] network: getaddrinfo accepts invalid numeric scope IDs
408 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
410 [20629] network: libresolv: Remove support for bitstring labels
412 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
413 assertion: "maxidx >= 2"
414 [20660] math: [arm] Use VSQRT
415 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
416 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
417 [20689] libc: Test for FMA should also check for AVX.
418 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
419 [20715] math: iszero macro breaks existing code
420 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
421 [20728] libc: powerpc: Missing TOC stub in clone
422 [20729] build: glibc-2.24 fails to build for i486 with -Os
423 [20750] build: Build fails with default PIE enabled gcc-6.x
424 [20768] math: [alpha] sqrt fegetenv namespace
425 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
427 [20787] math: float_t is defined as float incorrectly on x86_64 even if
428 __FLT_EVAL_METHOD__ is 2
429 [20790] network: rpcgen buffer overrun in get_prog_declaration
430 [20822] nptl: race condition in __lll_unlock_elision on powerpc
431 [20829] libc: crypt snprintf namespace
432 [20847] libc: tst-vfork3 failure
433 [20855] math: Default bits/mathdef.h has inappropriate float_t
434 [20859] math: [sh4] FP_ILOGB0 invalid
435 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
436 U+20AC), not same as GBK
437 [20915] dynamic-link: global-dynamic TLS broken on aarch64
438 [20916] math: pow handling of sNaN arguments
439 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
440 [20919] math: Bad pow (qNaN, 0) result with -lieee
441 [20940] math: hypot sNaN handling
442 [20947] math: fmax, fmin sNaN handling
443 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
444 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
446 [20971] string: powerpc64/power7 memchr overflows internal pointer check
447 [20973] nptl: robust mutexes: Lost wake-ups
448 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
449 [20978] nis: strlen on null pointer in nss_nisplus
450 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
452 [21014] string: i686 memchr overflows internal pointer check
453 [21019] libc: [mips] n32 lseek incorrect on overflow
454 [21022] libc: [microblaze] __backtrace get_frame_size namespace
455 [21026] libc: [MIPS] readahead syscall is broken on n64
456 [21028] math: Fallback fesetexceptflag should always succeed
457 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
458 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
460 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
461 [21061] librt: [microblaze] librt lost clock_* exports
462 [21073] libc: tunables: insecure environment variables passed to
463 subprocesses with AT_SECURE
464 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
468 * The minimum Linux kernel version that this version of the GNU C Library
469 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
470 kernel version 2.6.32 or later suffices (on architectures that already
471 required kernel versions more recent than 3.2, those requirements remain
472 unchanged). Linux 3.2 or later kernel headers are required on all
475 * The pap_AN locale has been deleted. This has been deprecated for a long
476 time. It has been replaced by pap_AW & pap_CW, both of which have long
477 been included in previous releases.
479 * The readdir_r and readdir64_r functions have been deprecated. It is
480 recommended to use readdir and readdir64 instead.
482 * The type “union wait” has been removed. It was deprecated in the early
483 1990s and never part of POSIX. Application code should use the int type
484 instead of “union wait”.
486 * A new NSS action is added to facilitate large distributed system
487 administration. The action, MERGE, allows remote user stores like LDAP
488 to be merged into local user stores like /etc/groups in order to provide
489 easy to use, updated, and managed sets of merged credentials. The new
490 action can be used by configuring it in /etc/nsswitch.conf:
491 group: files [SUCCESS=merge] nis
492 Implemented by Stephen Gallagher (Red Hat).
494 * The deprecated __malloc_initialize_hook variable has been removed from the
497 * The long unused localedef --old-style option has been removed. It hasn't
498 done anything in over 16 years. Scripts using this option can safely
501 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
502 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
503 return the next representable value in the direction of positive infinity
504 and the nextdown functions return the next representable value in the
505 direction of negative infinity. These are currently enabled as GNU
508 Security related changes:
510 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
511 could result in a stack overflow when getnetbyname was called with an
512 overly long name. (CVE-2016-3075)
514 * Previously, getaddrinfo copied large amounts of address data to the stack,
515 even after the fix for CVE-2013-4458 has been applied, potentially
516 resulting in a stack overflow. getaddrinfo now uses a heap allocation
517 instead. Reported by Michael Petlan. (CVE-2016-3706)
519 * The glob function suffered from a stack-based buffer overflow when it was
520 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
521 Reported by Alexander Cherepanov. (CVE-2016-1234)
523 * The Sun RPC UDP client could exhaust all available stack space when
524 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
525 alloca plugin for GCC. (CVE-2016-4429)
527 * The IPv6 name server management code in libresolv could result in a memory
528 leak for each thread which is created, performs a failing naming lookup,
529 and exits. Over time, this could result in a denial of service due to
530 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
532 The following bugs are resolved with this release:
534 [1170] localedata: ne_NP: update Nepali locale definition file
535 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
537 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
538 [6796] math: fdim() does not set errno on overflow
539 [10354] libc: posix_spawn should use vfork() in more cases than presently
540 [11213] localedata: localedata: add copyright disclaimer to locale files
541 [12143] localedata: chr_US: new Cherokee locale
542 [12450] localedata: sgs_LT: new locale
543 [12676] localedata: ln_CD: new locale
544 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
546 [13304] math: fma, fmaf, fmal produce wrong results
547 [14259] build: --localedir arg to configure is ignored
548 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
549 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
550 [14934] localedata: es_CL: wrong first weekday chilean locale
551 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
553 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
555 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
556 [15368] nptl: raise() is not async-signal-safe
557 [15479] math: ceil, floor, round and trunc raise inexact exception
558 [15578] localedata: kk_KZ: various updates
559 [16003] localedata: pap_AN: punt old locale
560 [16137] localedata: iw_IL: punt old locale
561 [16190] localedata: eo: new esperanto locale
562 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
563 [16742] malloc: race condition: pthread_atfork() called before first
564 malloc() results in unexpected locking behaviour/deadlocks
565 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
567 [16983] localedata: postal_fmt does not allow %l and %n modifiers
568 [17565] localedata: pt_PT: wrong (work-)week start
569 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
570 [17950] build: Build fails with -msse
571 [18205] localedata: be_BY*: wrong first_weekday and first_workday
572 [18433] libc: posix_spawn does not return correctly upon failure to
574 [18453] localedata: charmaps/IBM875: incorrect codes
575 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
577 [18896] localedata: he_IL: improvements for currency
578 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
580 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
582 [19056] libc: Deprecate readdir_r
583 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
585 [19198] localedata: nl_NL: small improvements for Dutch locales
586 [19257] network: Per-thread memory leak in __res_vinit with IPv6
587 nameservers (CVE-2016-5417)
588 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
590 [19400] locale: Language missing in "iso-639.def", trivial fix in
592 [19431] malloc: Deadlock between fflush, getdelim, and fork
593 [19505] libc: Incorrect file descriptor validity checks in
594 posix_spawn_file_actions_add{open,close,dup2}
595 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
597 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
598 `intl/{gettextP,loadinfo}.h'
599 [19534] libc: execle, execlp may use malloc
600 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
601 [19573] network: res_nclose and __res_maybe_init disagree about name
602 server initialization, breaking Hesiod
603 [19575] localedata: Status of GB18030 tables
604 [19581] localedata: sr_* date_fmt string contains additional newline
605 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
607 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
608 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
609 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
610 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
612 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
614 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
616 [19610] dynamic-link: ldconfig -X removes stale symbolic links
617 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
618 [19633] locale: strfmon_l applies global locale to number formatting
619 [19642] network: Memory leak in getnameinfo
620 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
621 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
623 [19654] math: [x86_64] Need testcase for BZ #19590 fix
624 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
626 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
627 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
629 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
631 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
633 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
634 pointers and lengths in error-case.
635 [19727] locale: Converting from/to UTF-xx with iconv() does not always
636 report errors on UTF-16 surrogates values.
637 [19755] nscd: nscd assertion failure in gc
638 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
639 [19759] libc: mempcpy shouldn't be inlined
640 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
641 [19765] libc: s390 needs an optimized mempcpy
642 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
643 NAME_MAX limit assumption (CVE-2016-1234)
644 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
645 [19787] network: Missing and incorrect truncation checks in getnameinfo
646 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
648 [19791] network: Assertion failure in res_query.c with un-connectable name
650 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
651 [19822] math: libm.so install clobbers old version
652 [19825] network: resolv: send_vc can return uninitialized data in second
653 response to getaddrinfo
654 [19830] network: nss_dns: should check RDATA length against buffer length
655 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
656 confronted with A/AAAA records of invalid size
657 [19837] nss: nss_db: No retries for some long lines with a larger buffer
658 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
659 [19853] stdio: Printing IBM long double in decimal with high precision is
661 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
662 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
663 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
665 [19865] network: Assertion failure or memory leak in
666 _nss_dns_getcanonname_r
667 [19868] network: nss_dns: netent code does not skip over non-PTR records
668 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
670 [19881] string: Improve x86-64 memset
671 [19907] string: Incorrect memcpy tests
672 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
674 [19925] libc: termios.h XCASE namespace
675 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
676 [19929] libc: limits.h NL_NMAX namespace
677 [19931] stdio: Memory leak in vfprintf
678 [19957] libc: clone(CLONE_VM) access invalid parent memory
679 [19963] localedata: en_IL: New locale
680 [19989] stdio: stdio.h cuserid namespace
681 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
683 [19996] locale: langinfo.h nl_langinfo_l namespace
684 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
685 [20010] network: getaddrinfo: Stack overflow in hostent translation
687 [20012] stdio: libio: fmemopen append mode failure
688 [20014] stdio: stdio.h namespace for pre-threads POSIX
689 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
690 [20023] libc: fcntl.h timespec namespace
691 [20024] math: [x86_64] vectorized sincos trashes the stack
692 [20031] network: nss_hesiod: Heap overflow in get_txt_records
693 [20041] time: sys/time.h timespec namespace
694 [20043] libc: unistd.h missing cuserid for UNIX98 and before
695 [20044] libc: unistd.h missing pthread_atfork for UNIX98
696 [20051] libc: ttyslot in wrong header under wrong conditions
697 [20054] libc: gethostname not declared for XPG4
698 [20055] libc: termios.h missing tcgetsid for XPG4
699 [20072] dynamic-link: x86 init_cpu_features is called twice in static
701 [20073] libc: sys/stat.h fchmod namespace
702 [20074] libc: stdlib.h rand_r namespace
703 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
704 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
706 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
707 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
709 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
710 [20119] libc: Wrong mask for processors level type from CPUID
711 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
712 AS not supporting AVX512
713 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
715 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
716 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
718 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
719 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
720 [20178] libc: posix_spawn{p} should not call exit
721 [20191] stdio: libio: vtables hardening
722 [20195] string: FMA4 detection requires CPUID execution with register
724 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
725 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
727 [20212] math: acos (sNaN) returns sNaN
728 [20213] math: asin (sNaN) returns sNaN
729 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
730 [20218] math: [i386] asinhl (sNaN) returns sNaN
731 [20219] math: [i386] atanhl (sNaN) returns sNaN
732 [20222] stdio: fopencookie: Mangle function pointers
733 [20224] math: [i386] cbrtl (sNaN) returns sNaN
734 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
735 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
737 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
738 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
739 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
740 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
741 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
742 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
743 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
744 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
745 [20240] math: modf (sNaN) returns sNaN
746 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
747 [20250] math: frexp (sNaN) returns sNaN
748 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
749 [20255] math: [i386] fdim, fdimf return with excess range and precision /
751 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
752 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
753 subscript is below array bounds [-Werror=array-bounds]
754 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
755 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
757 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
758 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
760 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
762 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
763 [20316] localedata: id_ID: Februari instead of Pebruari
764 [20327] string: POWER8 strcasecmp returns incorrect result
765 [20347] math: Failure: Test: j0_downward (0xap+0)
766 [20348] libc: FAIL: misc/tst-preadvwritev64
767 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
768 [20350] libc: There is no test for p{read,write}64
769 [20357] math: Incorrect cos result for 1.5174239687223976
770 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
774 * Unicode 8.0.0 Support: Character encoding, character type info, and
775 transliteration tables are all updated to Unicode 8.0.0, using new
776 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
777 These updates cause user visible changes, such as the fixes for bugs
778 89, 16061, and 18568.
780 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
781 kernel-internal CPU set size. This means that requests that change the
782 CPU affinity which failed before (for example, an all-ones CPU mask) will
783 now succeed. Applications that need to determine the effective CPU
784 affinities need to call sched_getaffinity or pthread_getaffinity_np after
785 setting it because the kernel can adjust it (and the previous size check
786 would not detect this in the majority of cases).
788 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
789 the following new symbols are used: fts64_children, fts64_close,
790 fts64_open, fts64_read and fts64_set.
792 * getaddrinfo now detects certain invalid responses on an internal netlink
793 socket. If such responses are received, an affected process will
794 terminate with an error message of "Unexpected error <number> on netlink
795 descriptor <number>" or "Unexpected netlink response of size <number> on
796 descriptor <number>". The most likely cause for these errors is a
797 multi-threaded application which erroneously closes and reuses the netlink
798 file descriptor while it is used by getaddrinfo.
800 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
801 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
802 unnecessary serialization of memory allocation requests across threads.
803 The defect is now corrected. Users should see a substantial increase in
804 the concurent throughput of allocation requests for applications which
805 trigger this bug. Affected applications typically create and
806 destroy threads frequently. (Bug 19048 was reported and analyzed by
809 * There is now a --disable-timezone-tools configure option for disabling the
810 building and installing of the timezone related utilities (zic, zdump, and
811 tzselect). This is useful for people who build the timezone data and code
812 independent of the GNU C Library.
814 * The obsolete header <regexp.h> has been removed. Programs that require
815 this header must be updated to use <regex.h> instead.
817 * The obsolete functions bdflush, create_module, get_kernel_syms,
818 query_module and uselib are no longer available to newly linked binaries;
819 the header <sys/kdaemon.h> has been removed. These functions and header
820 were specific to systems using the Linux kernel and could not usefully be
821 used with the GNU C Library on systems with version 2.6 or later of the
824 * Optimized string, wcsmbs and memory functions for IBM z13.
825 Implemented by Stefan Liebler.
827 * Newly linked programs that define a variable called signgam will no longer
828 have it set by the lgamma, lgammaf and lgammal functions. Programs that
829 require signgam to be set by those functions must ensure that they use the
830 variable provided by the GNU C Library and declared in <math.h>, without
831 defining their own copy.
833 * The minimum GCC version that can be used to build this version of the GNU
834 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
835 still be used to compile programs using the GNU C Library.
837 Security related changes:
839 * An out-of-bounds value in a broken-out struct tm argument to strftime no
840 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
842 * The LD_POINTER_GUARD environment variable can no longer be used to disable
843 the pointer guard feature. It is always enabled. Previously,
844 LD_POINTER_GUARD could be used to disable security hardening in binaries
845 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
848 * An integer overflow in hcreate and hcreate_r could lead to an
849 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
851 * The catopen function no longer has unbounded stack usage. Reported by
854 * The nan, nanf and nanl functions no longer have unbounded stack usage
855 depending on the length of the string passed as an argument to the
856 functions. Reported by Joseph Myers. (CVE-2014-9761)
858 * A stack-based buffer overflow was found in libresolv when invoked from
859 libnss_dns, allowing specially crafted DNS responses to seize control
860 of execution flow in the DNS client. The buffer overflow occurs in
861 the functions send_dg (send datagram) and send_vc (send TCP) for the
862 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
863 family. The use of AF_UNSPEC triggers the low-level resolver code to
864 send out two parallel queries for A and AAAA. A mismanagement of the
865 buffers used for those queries could result in the response of a query
866 writing beyond the alloca allocated buffer created by
867 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
868 the overflow. Thanks to the Google Security Team and Red Hat for
869 reporting the security impact of this issue, and Robert Holiday of
870 Ciena for reporting the related bug 18665. (CVE-2015-7547)
872 The following bugs are resolved with this release:
874 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
875 [887] math: Math library function "logb" and "nextafter" inconsistent
876 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
877 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
878 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
879 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
881 [4404] localedata: German translation of "Alarm clock" is misleading
882 [6799] math: nextafter() and nexttoward() doen't set errno on
883 overflow/underflow errors
884 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
886 [10432] nis: _nss_nis_setnetgrent assertion failure
887 [11460] libc: fts has no LFS support
888 [12926] network: getaddrinfo()/make_request() may spin forever
889 [13065] nptl: Race condition in pthread barriers
890 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
891 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
893 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
894 [14912] libc: Rename non-installed bits/*.h headers
895 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
896 [15367] math: Let gcc use __builtin_isinf
897 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
898 [15421] math: lgamma wrongly sets signgam for ISO C
899 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
900 FE_INVALID with argument out of range
901 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
903 [15786] dynamic-link: ifunc resolver functions can smash function
905 [15918] math: Unnecessary check for equality in hypotf()
906 [16061] localedata: Review / update transliteration data
907 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
909 [16141] time: strptime %z offset restriction
910 [16171] math: drem should be alias of remainder
911 [16296] math: fegetround is pure?
912 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
913 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
915 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
916 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
918 [16422] math: [powerpc] math-float, math-double failing llrint tests with
919 "Exception "Inexact" set" on ppc32
920 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
921 [16517] math: Missing underflow exception from tanf/tan/tanl
922 [16519] math: Missing underflow exception from sinhf
923 [16520] math: Missing underflow exception from tanhf
924 [16521] math: Missing underflow exception from exp2
925 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
927 [16734] stdio: fopen calls mmap to allocate its buffer
928 [16961] math: nan function incorrect handling of bad sequences
929 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
930 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
931 [16985] locale: localedef: confusing error message when opening output
933 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
934 [17197] locale: Redundant shift character in iconv conversion output at
936 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
937 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
938 [17250] dynamic-link: static linking breaks nss loading
939 (getaddrinfo/getpwnam/etc...)
940 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
942 [17441] math: isnan() should use __builtin_isnan() in GCC
943 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
944 (related to lock elision)
945 [17787] manual: Exponent on page 324 of the PDF ends prematurely
946 [17886] time: strptime should be able to parse "Z" as a timezone with %z
947 [17887] time: strptime should be able to parse "+01:00" style timezones
948 [17905] libc: catopen() Multiple unbounded stack allocations
950 [18084] libc: backtrace (..., 0) dumps core on x86
951 [18086] libc: nice() sets errno to 0 on success
952 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
953 is too large (CVE-2015-8778)
954 [18251] dynamic-link: SONAME missing when audit modules provides path
955 [18265] libc: add attributes for wchar string and memory functions
956 [18370] math: csqrt missing underflows
957 [18421] libc: [hppa] read-only segment has dynamic relocations
958 [18472] libc: Obsolete syscall wrappers should be compat symbols
959 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
960 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
961 [18525] localedata: Remove locale timezone information
962 [18560] libc: [powerpc] spurious bits/ipc.h definitions
963 [18568] localedata: Update locale data to Unicode 8.0
964 [18589] locale: sort-test.sh fails at random
965 [18595] math: ctan, ctanh missing underflows
966 [18604] libc: assert macro-expands its argument
967 [18610] math: S390: fetestexcept() reports any exception if DXC-code
968 contains a vector instruction exception.
969 [18611] math: j1, jn missing errno setting on underflow
970 [18618] localedata: sync Chechen locale definitions with other *_RU
972 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
973 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
974 [18665] network: In send_dg, the recvfrom function is NOT always using the
975 buffer size of a newly created buffer (CVE-2015-7547)
976 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
978 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
980 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
981 [18699] math: tilegx cproj() for various complex infinities does not yield
983 [18724] libc: Harden put*ent functions against data injection
984 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
985 [18755] build: build errors with -DNDEBUG
986 [18757] stdio: fmemopen fails to set errno on failure
987 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
989 [18781] libc: openat64 lacks O_LARGEFILE
990 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
991 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
992 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
993 [18790] math: [ldbl-128ibm] tanhl inaccurate
994 [18795] libc: stpncpy fortification misses buffer lengths that are
996 [18796] build: build fails for --disable-mathvec
997 [18803] math: hypot missing underflows
998 [18820] stdio: fmemopen may leak memory on failure
999 [18823] math: csqrt spurious underflows
1000 [18824] math: fma spurious underflows
1001 [18825] math: pow missing underflows
1002 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
1003 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
1004 [18870] build: sem_open.c fails to compile with missing symbol
1006 [18872] stdio: Fix memory leak in printf_positional
1007 [18873] libc: posix_fallocate overflow check ineffective
1008 [18875] math: Excess precision leads incorrect libm
1009 [18877] libc: arm: mmap offset regression
1010 [18887] libc: memory corruption when using getmntent on blank lines
1011 [18918] localedata: hu_HU: change time to HH:MM:SS format
1012 [18921] libc: Regression: extraneous stat() and fstat() performed by
1014 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
1015 binaries (CVE-2015-8777)
1016 [18951] math: tgamma missing underflows
1017 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
1019 [18953] localedata: lt_LT: change currency symbol to the euro
1020 [18956] math: powf inaccuracy
1021 [18961] math: [i386] exp missing underflows
1022 [18966] math: [i386] exp10 missing underflows
1023 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
1024 [18969] build: multiple string test failures due to missing locale
1026 [18970] libc: Reference of pthread_setcancelstate in libc.a
1027 [18977] math: float / long double Bessel functions not in XSI POSIX
1028 [18980] math: i386 libm functions return with excess range and precision
1029 [18981] math: i386 scalb*, ldexp return with excess range and precision
1030 [18982] stdio: va_list and vprintf
1031 [18985] time: Passing out of range data to strftime() causes a segfault
1033 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
1034 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
1035 [19012] locale: iconv_open leaks memory on error path
1036 [19016] math: clog, clog10 inaccuracy
1037 [19018] nptl: Mangle function pointers in tls_dtor_list
1038 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
1039 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
1040 [19048] malloc: malloc: arena free list can become cyclic, increasing
1042 [19049] math: [powerpc] erfc incorrect zero sign
1043 [19050] math: [powerpc] log* incorrect zero sign
1044 [19058] math: [x86_64] Link fail with -fopenmp and -flto
1045 [19059] math: nexttoward overflow incorrect in non-default rounding modes
1046 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
1047 [19074] network: Data race in _res_hconf_reorder_addrs
1048 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
1049 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
1050 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
1052 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
1054 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
1055 [19086] manual: posix_fallocate64 documented argument order is wrong.
1056 [19088] math: lround, llround missing exceptions close to overflow
1058 [19094] math: lrint, llrint missing exceptions close to overflow threshold
1059 [19095] math: dbl-64 lrint incorrect for 64-bit long
1060 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
1061 [19124] dynamic-link: ld.so failed to build with older assmebler
1062 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
1063 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
1064 [19134] math: [powerpc32] lround, lroundf spurious exceptions
1065 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
1066 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
1067 pthread_setaffinity_np
1068 [19156] math: [ldbl-128] j0l spurious underflows
1069 [19164] nptl: tst-getcpu fails with many possible CPUs
1070 [19168] math: math/test-ildoubl and math/test-ldouble failure
1071 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
1072 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
1074 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
1075 (FE_NOMASK_ENV) do not clear SSE exceptions
1076 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
1077 _int_new_arena/reused_arena
1078 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
1079 [19201] math: dbl-64 remainder incorrect sign of zero result
1080 [19205] math: bits/math-finite.h conditions do not match math.h and
1082 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
1083 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
1084 for C99-based standards
1085 [19212] libc: features.h not -Wundef clean
1086 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
1088 [19214] libc: Family and model identification for AMD CPU's are incorrect.
1089 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
1090 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
1092 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
1093 "inexact" exceptions
1094 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
1096 [19242] libc: strtol incorrect in Turkish locales
1097 [19243] malloc: reused_arena can pick an arena on the free list, leading
1098 to an assertion failure and reference count corruption
1099 [19253] time: tzset() ineffective when temporary TZ did not include DST
1101 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
1102 [19270] math: [hppa] Shared libm missing __isnanl
1103 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
1104 MAP_HUGETLB and MAP_STACK defines
1105 [19313] nptl: Wrong __cpu_mask for x32
1106 [19347] libc: grantpt: try to force a specific gid even without pt_chown
1107 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
1108 [19350] math: [ldbl-128ibm] sinhl spurious overflows
1109 [19351] math: [ldbl-128ibm] logl inaccurate near 1
1110 [19363] time: x32: times() return value wrongly truncates/sign extends
1112 [19367] dynamic-link: Improve branch prediction on Silvermont
1113 [19369] network: Default domain name not reset by res_ninit when "search"
1114 / "domain" entry is removed from resolv.conf
1115 [19375] math: powerpc: incorrect results for POWER7 logb with negative
1117 [19385] localedata: bg_BG: time separator should be colon, not comma
1118 [19408] libc: linux personality syscall wrapper may erroneously return an
1119 error on 32-bit architectures
1120 [19415] libc: dladdr returns wrong names on hppa
1121 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
1122 IBM905, IBM907, and IBM909
1123 [19439] math: Unix98 isinf and isnan functions conflict with C++11
1124 [19443] build: build failures with -DDEBUG
1125 [19451] build: Make check fails on test-double-vlen2
1126 [19462] libc: Glibc failed to build with -Os
1127 [19465] math: Wrong code with -Os
1128 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
1130 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
1132 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
1133 [19486] math: S390: Math tests fail with "Exception Inexact set".
1134 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
1135 [19550] libc: [mips] mmap negative offset handling inconsistent with other
1137 [19590] math: Fail to build shared objects that use libmvec.so functions.
1141 * The following bugs are resolved with this release:
1143 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
1144 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
1145 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
1146 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
1147 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
1148 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
1149 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
1150 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
1151 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
1152 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
1153 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
1154 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
1155 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
1156 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
1157 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
1158 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
1159 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
1160 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
1161 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
1162 18657, 18676, 18694, 18696, 18887.
1164 * Cache information can be queried via sysconf() function on s390 e.g. with
1165 _SC_LEVEL1_ICACHE_SIZE as argument.
1167 * A buffer overflow in gethostbyname_r and related functions performing DNS
1168 requests has been fixed. If the NSS functions were called with a
1169 misaligned buffer, the buffer length change due to pointer alignment was
1170 not taken into account. This could result in application crashes or,
1171 potentially arbitrary code execution, using crafted, but syntactically
1172 valid DNS responses. (CVE-2015-1781)
1174 * The time zone file parser has been made more robust against crafted time
1175 zone files, avoiding heap buffer overflows related to the processing of
1176 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
1177 large time zone data files. Overly long time zone specifiers in the TZ
1178 variable no longer result in stack overflows and crashes.
1180 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
1181 for LD and GD on x86 and x86-64, has been implemented. You will need
1182 binutils-2.24 or later to enable this optimization.
1184 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
1185 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
1186 Hat). These updates cause user visible changes, such as the fix for bug
1189 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
1190 and getXXbyYY NSS calls for the same database, causing a denial-of-service
1191 condition in some applications.
1193 * Added vector math library named libmvec with the following vectorized x86_64
1194 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
1196 The library can be disabled with --disable-mathvec. Use of the functions is
1197 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
1198 Shared library libmvec.so is linked in as needed when using -lm (no need to
1199 specify -lmvec explicitly for not static builds).
1200 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
1202 * A new fmemopen implementation has been added with the goal of POSIX
1203 compliance. The new implementation fixes the following long-standing
1204 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
1205 old implementation is still present for use be by existing binaries.
1207 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
1208 releases. It has been fixed to match 2.19 and older, but binaries built
1209 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
1211 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
1212 Contributed by Roland McGrath (Google).
1214 * The header <regexp.h> is deprecated, and will be removed in a future
1215 release. Use of this header will trigger a deprecation warning.
1216 Application developers should update their code to use <regex.h> instead.
1218 This header was formerly part of SUS, but was deprecated in 1994 and
1219 removed from the standard in 2001. Also, the glibc implementation
1220 leaks memory. See BZ#18681 for more details.
1224 * The following bugs are resolved with this release:
1226 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
1227 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
1228 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
1229 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
1230 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
1231 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
1232 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
1233 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
1234 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
1235 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
1238 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
1239 too little memory for the to-be-scanned arguments and overflow the
1240 allocated buffer. The implementation now correctly computes the required
1241 buffer size when using malloc, and switches to malloc from alloca as
1244 * A new semaphore algorithm has been implemented in generic C code for all
1245 machines. Previous custom assembly implementations of semaphore were
1246 difficult to reason about or ensure that they were safe. The new version
1247 of semaphore supports machines with 64-bit or 32-bit atomic operations.
1248 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
1249 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
1251 * Port to Altera Nios II has been contributed by Mentor Graphics.
1253 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
1254 implementations for powerpc64/powerpc64le.
1255 Implemented by Adhemerval Zanella (IBM).
1257 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
1258 and powerpc64le. This may improve lock scaling of existing programs on
1259 HTM capable systems. The lock elision code is only enabled with
1260 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1261 powerpc will issue a transaction abort on every syscall to avoid side
1262 effects being visible outside transactions.
1264 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1265 AArch64. Contributed by ARM Ltd.
1267 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1269 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1270 under certain input conditions resulting in the execution of a shell for
1271 command substitution when the application did not request it. The
1272 implementation now checks WRDE_NOCMD immediately before executing the
1273 shell and returns the error WRDE_CMDSUB as expected.
1275 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1276 processing format strings with a large number of format specifiers.
1278 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1279 infinite loop if the DNS response contained a PTR record of an unexpected
1282 * The minimum GCC version that can be used to build this version of the GNU
1283 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1284 still be used to compile programs using the GNU C Library.
1286 * The GNU C Library is now built with -Werror by default. This can be
1287 disabled by configuring with --disable-werror.
1289 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1291 * The obsolete sigvec function has been removed. This was the original
1292 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1293 programs have been using instead for about 25 years. Of course, ABI
1294 compatibility for old binaries using sigvec remains intact.
1296 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1297 with newer versions of bison.
1299 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1300 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1301 registers overlay two consecutive single-precision registers. MIPS32R2
1302 introduced a new FPU mode (FR=1) where double-precision registers extend the
1303 corresponding single-precision registers which is incompatible with the
1304 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1305 require the use of FR=1 making a transition necessary. New o32 ABI
1306 extensions enable users to migrate over time from the original o32 ABI
1307 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1308 tracks the ABI of any loaded object and verifies that new objects are
1309 compatible. Mode transitions will also be requested as required and
1310 unsupportable objects will be rejected. The ABI checks include both soft and
1311 hard float ABIs for o32, n32 and n64.
1313 GCC 5 with GNU binutils 2.25 onwards:
1314 It is strongly recommended that all o32 system libraries are built using the
1315 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1316 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1317 compiler using --with-fp-32=xx to set this by default.
1321 * The following bugs are resolved with this release:
1323 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1324 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1325 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1326 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1327 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1328 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1329 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1330 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1331 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1332 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1333 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1334 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1335 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1336 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1337 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1339 * Reverted change of ABI data structures for s390 and s390x:
1340 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1341 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1342 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1343 are preserved pointing straight to the same implementation as the old ones.
1344 Given that, new callers will simply provide a too-big buffer to these
1345 functions. Any applications/libraries out there that embed jmp_buf or
1346 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1347 against 2.19 headers will have to rebuilt again. This is necessary in any
1348 case to revert the breakage in their ABI caused by the glibc change.
1350 * Support for file description locks is added to systems running the
1351 Linux kernel. The standard file locking interfaces are extended to
1352 operate on file descriptions, not file descriptors, via the use of
1353 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1354 are associated with an open file instead of a process.
1356 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1358 * The minimum Linux kernel version that this version of the GNU C Library
1359 can be used with is 2.6.32.
1361 * Running the testsuite no longer terminates as soon as a test fails.
1362 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1363 with PASS or FAIL lines for individual tests. A summary of the results is
1364 printed, including a list of failing lists, and "make check" exits with
1365 error status if there were any unexpected failures. "make check
1366 stop-on-test-failure=y" may be used to keep the old behavior.
1368 * The am33 port, which had not worked for several years, has been removed
1371 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1372 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1373 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1374 conflicted with POSIX (support for which was removed in 2.19), the
1375 interfaces those macros enabled remain available when compiling with
1376 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1377 test macros defined.
1379 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1381 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1382 This may improve lock scaling of existing programs on TX capable systems.
1383 The lock elision code is only built with --enable-lock-elision=yes and
1384 then requires a GCC version supporting the TX builtins. With lock elision
1385 default mutexes are elided via __builtin_tbegin, if the cpu supports
1386 transactions. By default lock elision is not enabled and the elision code
1389 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1390 copy the path argument. This allowed programs to cause posix_spawn to
1391 deference a dangling pointer, or use an unexpected pathname argument if
1392 the string was modified after the posix_spawn_file_actions_addopen
1395 * All supported architectures now use the main glibc sysdeps directory
1396 instead of some being in a separate "ports" directory (which was
1397 distributed separately before glibc 2.17).
1399 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1400 On configurations that support it (all Linux configurations), it's now
1401 used regardless of the --enable-add-ons switch to configure. It is no
1402 longer possible to build such configurations without pthreads support.
1404 * Locale names, including those obtained from environment variables (LANG
1405 and the LC_* variables), are more tightly checked for proper syntax.
1406 setlocale will now fail (with EINVAL) for locale names that are overly
1407 long, contain slashes without starting with a slash, or contain ".." path
1408 components. (CVE-2014-0475) Previously, some valid locale names were
1409 silently replaced with the "C" locale when running in AT_SECURE mode
1410 (e.g., in a SUID program). This is no longer necessary because of the
1413 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1414 with application code using Intel MPX instructions. (With all previous
1415 versions, the MPX register state could be clobbered when making calls
1416 into or out of a shared library.) Note that while the new dynamic
1417 linker is compatible with all known x86 hardware whether or not it
1418 supports Intel MPX, some x86 instruction-set emulators might fail to
1419 handle the new instruction encodings. This is known to affect Valgrind
1420 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1421 release), and might affect other tools that do instruction emulation.
1423 * Support for loadable gconv transliteration modules has been removed.
1424 The support for transliteration modules has been non-functional for
1425 over a decade, and the removal is prompted by security defects. The
1426 normal gconv conversion modules are still supported. Transliteration
1427 with //TRANSLIT is still possible, and the //IGNORE specifier
1428 continues to be supported. (CVE-2014-5119)
1430 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1431 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1432 resulting a denial-of-service security vulnerability in applications which
1433 use functions related to iconv. (CVE-2014-6040)
1437 * The following bugs are resolved with this release:
1439 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1440 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1441 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1442 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1443 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1444 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1445 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1446 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1447 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1448 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1449 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1450 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1451 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1452 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1453 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1454 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1455 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1456 16431, 16453, 16474, 16506, 16510, 16529
1458 * Slovenian translations for glibc messages have been contributed by the
1459 Translation Project's Slovenian team of translators.
1461 * The public headers no longer use __unused nor __block. This change is to
1462 support compiling programs that are derived from BSD sources and use
1463 __unused internally, and to support compiling with Clang's -fblock
1464 extension which uses __block.
1466 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1467 large collation sequences to optimize multiple passes. This cache
1468 computation may overflow for large collation sequences and may cause a
1469 stack or buffer overflow. This is now fixed to use a slower algorithm
1470 which does not use a cache if there is an integer overflow.
1472 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1473 rules for large collation sequences to optimize multiple passes and falls
1474 back to alloca if malloc fails, resulting in a possible stack overflow.
1475 The implementation now falls back to an uncached collation sequence lookup
1478 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1479 initialized for static applications resulting in the security feature
1480 being disabled. The pointer guard is now correctly initialized to a
1481 random value for static applications. Existing static applications need
1482 to be recompiled to take advantage of the fix (bug 15754).
1484 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1485 to the d_name member of struct dirent, or omit the terminating NUL
1486 character. (Bugzilla #14699).
1488 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1489 aligned_alloc functions could allocate too few bytes or corrupt the
1490 heap when passed very large allocation size values (Bugzilla #15855,
1493 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1494 for AF_INET6 has been fixed (Bugzilla #16072).
1496 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1497 pap_CW, quz_PE, the_NP.
1499 * Substantially revised locales: gd_GB, ht_HT
1501 * The LC_ADDRESS field was updated to support country_car for almost all
1504 * ISO 1427 definitions were updated.
1506 * ISO 3166 definitions were updated.
1508 * The localedef utility now supports --big-endian and --little-endian
1509 command-line options to generate locales for a different system from that
1510 for which the C library was built.
1512 * Binary locale files now only depend on the endianness of the system for
1513 which they are generated and not on other properties of that system. As a
1514 consequence, binary files generated with new localedef may be incompatible
1515 with old versions of the GNU C Library, and binary files generated with
1516 old localedef may be incompatible with this version of the GNU C Library,
1517 in the following circumstances:
1519 + Locale files may be incompatible on m68k systems.
1521 + Locale archive files (but not separate files for individual locales) may
1522 be incompatible on systems where plain "char" is signed.
1524 * The configure option --disable-versioning has been removed. Builds with
1525 --disable-versioning had not worked for several years.
1527 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1528 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1530 * SystemTap probes for malloc have been introduced.
1532 * SystemTap probes for slow multiple precision fallback paths of
1533 transcendental functions have been introduced.
1535 * Support for powerpc64le has been added.
1537 * The soft-float powerpc port now supports e500 processors.
1539 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1541 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1542 set of header declarations that are enabled by default, even when other
1543 feature test macros or compiler options such as -std=c99 would otherwise
1544 disable some of those declarations.
1546 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1547 conflict with POSIX. The libbsd-compat library (which was a dummy library
1548 that did nothing) has also been removed.
1550 * Preliminary documentation about Multi-Thread, Async-Signal and
1551 Async-Cancel Safety has been added.
1553 * Change of ABI data structures for s390 and s390x:
1554 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1555 allow for future hardware extensions. All library functions that accept or
1556 return these structures were versioned in order to provide backwards
1557 compatibility with existing code. However, not all cases can be handled
1558 with interface versioning. If an application embeds either structure into
1559 another structure and that structure is passed to another compilation unit
1560 which expects the newer larger-sized object then any access to the new
1561 fields will result in undefined behaviour. Similarly any access to fields
1562 that were moved by the enlarging of the structures will cause undefined
1563 behaviour. To fix the undefined behaviour all objects that are part of the
1564 final in-memory image must agree on the size of structures, and this may
1565 require recompilation.
1569 * The following bugs are resolved with this release:
1571 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1572 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1573 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1574 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1575 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1576 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1577 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1578 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1579 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1580 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1581 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1582 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1583 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1586 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1587 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1588 Distributions can re-enable building and using pt_chown via the new configure
1589 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1590 considerable security risks and should only be used if the distribution
1591 understands and accepts the risks.
1593 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1596 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1597 fixed (Bugzilla #15330).
1599 * Add support for calling C++11 thread_local object destructors on thread
1600 and program exit. This needs compiler support for offloading C++11
1601 destructor calls to glibc.
1603 * Improved worst case performance of libm functions with double inputs and
1606 * Support for priority inherited mutexes in pthread condition variables on
1607 non-x86 architectures.
1609 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1611 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1613 * Optimized string functions for ARM. Implemented by Will Newton and
1616 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1618 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1621 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1622 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1624 * Added a benchmark framework to track performance of functions in glibc.
1626 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1627 It is based on draft TS 18661 and currently enabled as a GNU extension.
1629 * On Linux, the clock function now uses the clock_gettime system call
1630 for improved precision, rather than old times system call.
1632 * Added support for version-3 tz format files. This is needed when using
1633 the tz database release 2013e or later, and affects a few unusual cases --
1634 currently only TZ='America/Godthab' for time stamps after 2037.
1636 * Added new API functions pthread_getattr_default_np and
1637 pthread_setattr_default_np to get and set the default pthread
1638 attributes of a process.
1640 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1641 This may improve lock scaling of existing programs on TSX capable systems.
1642 When the --enable-lock-elision=yes parameter is specified at configure
1643 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1646 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1647 availability). Implemented by Ryan S. Arnold.
1649 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1653 * The following bugs are resolved with this release:
1655 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1656 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1657 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1658 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1659 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1660 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1661 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1662 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1663 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1664 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1665 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1666 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1667 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1668 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1669 14879, 14889, 14893, 14898, 14914.
1671 * Optimization of memcpy for MIPS.
1673 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1674 EMFILE has been fixed (Bugzilla #14889).
1676 * The add-on ports collection is now distributed in the "ports" subdirectory
1677 of the main GNU C Library distribution, rather than separately.
1679 * Port to ARM AArch64 contributed by Linaro.
1681 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1682 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1684 Implemented by Andreas Krebbel.
1686 * The new function secure_getenv allows secure access to the environment,
1687 returning NULL if running in a SUID/SGID process. This function replaces
1688 the internal function __secure_getenv.
1690 * SystemTap static probes have been added into the dynamic linker.
1691 Implemented by Gary Benson.
1693 * Optimizations of string functions strstr, strcasestr and memmem.
1694 Implemented by Maxim Kuvyrkov.
1696 * The minimum Linux kernel version that this version of the GNU C Library
1697 can be used with is 2.6.16.
1699 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1700 powerpc POWER7. Implemented by Will Schmidt.
1702 * New configure option --disable-nscd builds the C library such that it
1703 never attempts to contact the Name Service Caching Daemon (nscd).
1704 New configure option --disable-build-nscd avoids building nscd itself;
1705 this is the default if --disable-nscd is used.
1707 * Improved support for cross-compilation, including cross-testing and
1708 bootstrap builds without a previously built glibc.
1710 * Several testsuite tests are now able to test multiple IFUNC variants of an
1711 interface, rather than just testing the one that would be chooen by
1714 * New configure options --with-bugurl and --with-pkgversion, for
1715 distributors to use to embed their bug-reporting and package version
1716 information in --help and --version output.
1718 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1719 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1720 allows creation of chroots without the procfs mounted on /proc.
1722 * The `crypt' function now fails if passed salt bytes that violate the
1723 specification for those values. On Linux, the `crypt' function will
1724 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1725 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1726 when the mode is enabled.
1728 * The `clock_*' suite of functions (declared in <time.h>) is now available
1729 directly in the main C library. Previously it was necessary to link with
1730 -lrt to use these functions. This change has the effect that a
1731 single-threaded program that uses a function such as `clock_gettime' (and
1732 is not linked with -lrt) will no longer implicitly load the pthreads
1733 library at runtime and so will not suffer the overheads associated with
1734 multi-thread support in other code such as the C++ runtime library.
1736 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1741 * The following bugs are resolved with this release:
1743 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1744 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1745 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1746 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1747 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1748 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1749 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1750 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1751 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1752 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1753 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1754 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1755 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1756 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1757 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1758 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1759 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1760 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1761 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1762 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1763 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1764 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1767 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1768 configuring glibc with:
1769 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1770 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1771 Implemented by H.J. Lu.
1775 + define static_assert
1777 + do not declare gets
1779 + declare at_quick_exit and quick_exit also for ISO C11
1781 + aligned_alloc. NB: The code is deliberately allows the size parameter
1782 to not be a multiple of the alignment. This is a moronic requirement
1783 in the standard but it is only a requirement on the caller, not the
1786 + timespec_get added
1788 + uchar.h support added
1790 + CMPLX, CMPLXF, CMPLXL added
1792 Implemented by Ulrich Drepper.
1794 * Support for the IA-64 has been moved to ports.
1796 * Remove support for anything but ELF binary format
1798 * Checking versions of poll, ppoll added.
1799 Implemented by Ulrich Drepper.
1801 * More generic and 64-bit performance optimizations to math functions.
1802 Implemented by Ulrich Drepper.
1804 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1805 headers and functions available at compile time as they were before
1806 version 2.14. This option will be removed at some time in the future
1807 after the TI-RPC library becomes fully sufficient for the needs of
1808 existing applications.
1810 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1811 Note that glibc is not expected to work with any Linux kernel version
1814 * New header <sys/auxv.h> and function getauxval allowing easy access to
1815 the AT_* key-value pairs passed from the Linux kernel. The header also
1816 defines the HWCAP_* bits associated with the AT_HWCAP key.
1818 * New locales: mag_IN
1820 * New configure option --enable-systemtap builds SystemTap static probes
1821 into libc for setjmp and longjmp and into libpthread for various operations.
1822 So far the setjmp/longjmp probes and some of the libpthread probes are
1823 provided only for i*86 and x86_64.
1824 Implemented by Roland McGrath and Rayson Ho.
1826 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1828 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1831 * More optimized functions for SPARC. Implemented by David S. Miller.
1833 * Improved support for cross-compilation, especially bootstrap builds
1834 without a previously built glibc.
1836 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1837 Chris Metcalf from Tilera.
1839 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1840 now supported for ARM processors.
1842 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1843 as the name of the dynamic linker, to distinguish it from the
1844 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1846 * Support for CRIS has been removed from ports.
1848 * A new class of installed header has been documented for low-level
1849 platform-specific functionality. PowerPC added the first instance with a
1850 function to provide time base register access. Contributed by Tulio
1851 Magno Quites Machado Filho.
1853 * ix86 configurations now install header files that are consistent with
1854 what x86-64 configurations install. These same header files can be used
1855 for -m32, -m64, or -mx32 builds.
1856 Contributed by H.J. Lu.
1858 * Math library bug fixes. A thorough audit of all open math library bugs was
1859 conducted by Joseph Myers. Significant progress was made on many math
1860 library bugs resulting in more accurate exceptions and function results.
1861 Many thanks to all those that contributed including Andreas Jaeger for his
1862 patch review and work on the x87 trigonometric instruction issues.
1864 * Timezone data is no longer installed. Timezone-related binaries and scripts
1865 will continue to be installed. Users should obtain their timezone data from
1866 their distribution provider or from the tzdata package at
1867 <ftp://munnari.oz.au/pub/>.
1871 * The following bugs are resolved with this release:
1873 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1874 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1875 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1876 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1877 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1878 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1879 13484, 13506, 13515, 13523, 13524, 13538, 13540
1881 * New program pldd to list loaded object of a process
1882 Implemented by Ulrich Drepper.
1884 * Add nss_db support back to glibc. No more dependency on Berkeley db
1885 and support for initgroups lookups.
1886 Implemented by Ulrich Drepper.
1888 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1889 Contributed by HJ Lu.
1891 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1892 Contributed by HJ Lu.
1894 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1895 on x86-32 and x86-64.
1896 Contributed by Liubov Dmitrieva.
1898 * Optimized strchr and strrchr for SSE on x86-32.
1899 Contributed by Liubov Dmitrieva.
1901 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1902 for x86-64 and x86-32.
1903 Contributed by Liubov Dmitrieva.
1905 * New interfaces: scandirat, scandirat64
1906 Implemented by Ulrich Drepper.
1908 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1909 Implemented by Ulrich Drepper.
1911 * nscd now also caches the netgroup database.
1912 Implemented by Ulrich Drepper.
1914 * Integrate libm with gcc's -ffinite-math-only option.
1915 Implemented by Ulrich Drepper.
1917 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1918 to math functions. Implemented by Ulrich Drepper.
1920 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1921 Implemented by Ulrich Drepper.
1923 * New Linux interfaces: process_vm_readv, process_vm_writev
1925 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1926 Implemented by Ulrich Drepper.
1928 * Optimized nearbyint and strcasecmp for PPC.
1929 Implemented by Adhemerval Zanella.
1931 * New locales: bho_IN, unm_US, es_CU, ta_LK
1935 * The following bugs are resolved with this release:
1937 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1938 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1939 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1940 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1941 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1942 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1943 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1944 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1945 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1946 12795, 12811, 12813, 12814, 12841
1948 * The RPC implementation in libc is obsoleted. Old programs keep working
1949 but new programs cannot be linked with the routines in libc anymore.
1950 Programs in need of RPC functionality must be linked against TI-RPC.
1951 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1953 Visible changes of this change include (obviously) the inability to link
1954 programs using RPC functions without referencing the TI-RPC library and the
1955 removal of the RPC headers from the glibc headers.
1956 Implemented by Ulrich Drepper.
1958 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1959 syncfs, setns, sendmmsg
1961 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1962 yue_HK, lij_IT, mhr_RU
1964 * New encodings: CP770, CP771, CP772, CP773, CP774
1966 * New program sotruss to trace calls through PLTs
1967 Implemented by Ulrich Drepper.
1969 * The malloc hook implementation is marked deprecated and will be removed
1970 from the default implementation in the next version. The design never
1971 worked ever since the introduction of threads. Even programs which do
1972 not create threads themselves can use multiple threads created internally.
1976 * The following bugs are resolved with this release:
1978 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1979 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1980 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1981 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1984 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1986 * POWER7 optimizations: memset, memcmp, strncmp
1988 * New optimized string functions for x86-64: strnlen (SSE2),
1989 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1990 Implemented by Ulrich Drepper.
1994 * The following bugs are resolved with this release:
1996 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1997 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1998 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1999 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
2000 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
2001 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
2002 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
2003 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
2005 * New interfaces: pthread_getname_np, pthread_setname_np
2007 * New Linux interface: recvmmsg
2009 * STT_GNU_IFUNC implemented for Sparc by David Miller.
2011 * The dynamic linker now recognizes supported ABI versions from the
2012 EI_ABIVERSION field in the ELF header.
2013 Implemented by Ulrich Drepper.
2015 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
2016 will not be used to fill in password fields in the passwd.byname replies.
2017 Instead it is used to synthesize the shadow.byname table, should it be
2018 missing. This is a useful mode in some installations involving Solaris.
2019 Implemented by Ulrich Drepper.
2021 * New locales: kok_IN, sq_MK, cv_RU
2025 * The following bugs are resolved with this release:
2027 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
2028 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
2029 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
2030 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
2031 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
2032 10789, 10817, 10823, 10840, 10847
2034 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
2036 Implemented by Ulrich Drepper.
2038 * Checking version of longjmp added that fails if an uninitialized stack
2039 frame would be created. Implemented by Ulrich Drepper.
2041 * STT_GNU_IFUNC is now supported in static executables.
2042 Implemented by H.J. Lu.
2044 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
2046 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
2047 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
2048 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
2049 Contributed by H.J. Lu.
2051 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
2052 Implemented by Ulrich Drepper.
2054 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
2056 Contributed by H.J. Lu.
2058 * Support for fma instruction in AVX on x86-64.
2059 Implemented by H.J. Lu and Ulrich Drepper.
2061 * AVX support in x86-64 auditing support in ld.so.
2062 Implemented by H.J. Lu.
2064 * STB_GNU_UNIQUE support added.
2065 Implemented by Ulrich Drepper.
2067 * Implement second fallback mode for optimized DNS lookup for even more
2068 broken environments. If two requests from the same port are not
2069 handled correctly close the socket and open a new one before sending
2070 the second request. The 'single-request-reopen' option in /etc/resolv.conf
2071 can be used to select this mode right away, instead of rediscovering the
2072 necessity is every process again.
2073 Implemented by Ulrich Drepper.
2075 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
2076 Implemented by Adam Tkac.
2078 * Optimized iconv conversions for S390x.
2079 Implemented by Andreas Krebbel.
2081 * Using condvars with PI mutexes is now more efficient due to kernel
2082 support for requeueing to PI futexes. NPTL support added for x86-64.
2083 Implemented by Ulrich Drepper.
2085 * New locales: ps_AF, my_MM
2089 * The following bugs are resolved with this release:
2091 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
2092 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
2093 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
2094 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
2095 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
2097 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
2098 Implemented by Ulrich Drepper.
2100 * New Linux interfaces: accept4, fallocate, fallocate64.
2101 Implemented by Ulrich Drepper.
2103 * Correct declarations of string function when used in C++ code. This
2104 could lead to compile errors for invalid C++ code.
2106 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
2109 * New POSIX 2008 interface: psiginfo
2110 Implemented by Ulrich Drepper.
2112 * New ISO C++1x interfaces: quick_exit, at_quick_exit
2113 Implemented by Ulrich Drepper.
2115 * Support for selecting between multiple function definitions at runtime
2116 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
2118 * The libcrypt library can now use the hash function implementations in
2119 NSS. Implemented by Ulrich Drepper.
2121 * The malloc implementation can be compiled to be less memory efficient
2122 but higher performing in multi-threaded programs.
2123 Implemented by Ulrich Drepper.
2125 * New locales: nan_TW@latin, ks_IN
2127 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
2128 Implemented by Ulrich Drepper.
2130 * Extended printf hook support. It is possible to use user-defined types
2131 and extend existing format specifiers.
2132 Implemented by Ulrich Drepper.
2134 * Handling for group shadow files has been added.
2135 Implemented by Ulrich Drepper.
2137 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
2138 servers (the case, e.g., for some people using the built-in DNS
2139 server in ADSL modems/routers). There is a once-per-process timeout
2140 in case of a broken server. To avoid it, users can run nscd or put
2141 'options single-request' in /etc/resolv.conf.
2142 Implemented by Ulrich Drepper.
2146 * The following bugs are resolved with this release:
2148 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
2149 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
2150 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
2151 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
2152 6968, 6974, 6980, 6995, 7008, 7009, 7029
2154 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
2155 up at the same time. Implemented by Ulrich Drepper.
2157 * TLS descriptors for LD and GD on x86 and x86-64.
2158 Implemented by Alexandre Oliva.
2160 * getaddrinfo now handles DCCP and UDPlite.
2161 Implemented by Ulrich Drepper.
2163 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
2164 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
2165 Implemented by Ulrich Drepper.
2167 * New implementation of memmem, strstr, and strcasestr which is O(n).
2168 Implemented by Eric Blake.
2170 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
2172 * Implement "e" option for popen to open file descriptor with the
2173 close-on-exec flag set. Implemented by Ulrich Drepper.
2175 * Implement "b" mode for fmemopen. In this mode writes writes don't
2176 implicitly add a NUL byte and seeks from the end of the buffer really
2177 use the buffer end, not the string length as the basis.
2178 Implemented by Ulrich Drepper.
2180 * Many functions, exported and internal, now atomically set the close-on-exec
2181 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
2183 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
2185 Implemented by Pravin Satpute.
2187 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
2191 * The following bugs are resolved with this release:
2193 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
2194 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
2195 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
2196 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
2197 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
2198 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
2199 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
2201 * New locales: bo_CN, bo_IN, shs_CA.
2203 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
2205 * Sorting rules for some Indian languages (Devanagari and Gujarati).
2206 Implemented by Pravin Satpute.
2208 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
2210 * nscd caches now all timeouts for DNS entries
2211 Implemented by Ulrich Drepper.
2213 * nscd is more efficient and wakes up less often.
2214 Implemented by Ulrich Drepper.
2216 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
2217 vdprintf, and obstack_vprintf.
2218 Implemented by Jakub Jelinek.
2220 * Faster memset for x86-64.
2221 Implemented by Harsha Jagasia and H.J. Lu.
2223 * Faster memcpy on x86.
2224 Implemented by Ulrich Drepper.
2226 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
2227 Implemented by Ulrich Drepper.
2229 * Faster sqrt and sqrtf implemention for some PPC variants.
2230 Implemented by Steven Munroe.
2234 * The following bugs are resolved with this release:
2236 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
2237 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
2238 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
2239 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
2240 5071, 5103, 5104, 5112, 5113, 5184, 5186
2242 * More checking functions: fread, fread_unlocked, open*, mq_open.
2243 Implemented by Jakub Jelinek and Ulrich Drepper.
2245 * Extend fortification to C++. Implemented by Jakub Jelinek.
2247 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
2248 by not recognizing 'a' as a modifier when those specs are requested.
2249 Implemented by Jakub Jelinek.
2251 * PPC optimizations to math and string functions.
2252 Implemented by Steven Munroe.
2254 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
2255 options to be passed. Implemented by Ulrich Drepper.
2257 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
2259 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
2260 Implemented by Ulrich Drepper.
2262 * Handle private futexes in the NPTL implementation.
2263 Implemented by Jakub Jelinek and Ulrich Drepper.
2265 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2266 Implemented by Roland McGrath and Ulrich Drepper.
2268 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2270 * SHA-256 and SHA-512 based password encryption.
2271 Implemented by Ulrich Drepper.
2273 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2274 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2277 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2278 Implemented by Ulrich Drepper.
2282 * The following bugs are resolved with this release:
2284 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2285 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2286 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2287 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2288 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2289 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2290 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2293 * New Linux interfaces: epoll_pwait, sched_getcpu.
2295 * New generic interfaces: strerror_l.
2297 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2301 * The following bugs are resolved with this release:
2303 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2304 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2305 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2306 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2307 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2308 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2309 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2310 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2311 3225, 3251, 3252, 3253, 3273
2313 * For Linux, the sorting of addresses returned by getaddrinfo now also
2314 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2315 Implemented by Ulrich Drepper.
2317 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2318 Implemented by Ulrich Drepper.
2320 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2322 * New iconv module for MIK. Contributed by Alexander Shopov.
2324 * For sites with broken group and/or passwd database, the auto-propagate
2325 option of nscd can prevent creating ID lookup entries from the results
2326 of a name lookup and vice versa. This usually is no problem but some
2327 site might have problems with the default behavior.
2328 Implemented by Ulrich Drepper.
2330 * Iterating over entire database in NIS can be slow. With the
2331 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2332 to trade time for memory. The entire database will be read at once.
2333 Implemented by Ulrich Drepper.
2335 * The interfaces introduced in RFC 3542 have been implemented by
2338 * Support for the new ELF hash table format was added by Ulrich Drepper.
2340 * Support for priority inheritance mutexes added by Jakub Jelinek and
2343 * Support for priority protected mutexes added by Jakub Jelinek.
2345 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2346 or_IN, csb_PL, fy_NL, sr_ME.
2350 * More overflow detection functions.
2352 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2353 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2355 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2356 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2357 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2358 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2359 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2360 by Masahide Washizawa.
2362 * It is now possible to install audit libraries for the dynamic linker using
2363 LD_AUDIT. Implemented by Ulrich Drepper.
2365 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2366 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2367 For a libc and libpthread that works well on Linux 2.4 kernels, we
2368 recommend using the stable 2.3 branch.
2370 * The new function open_wmemstream acts like open_memstream,
2371 but uses a wchar_t wide character buffer.
2373 * The new function ppoll is an improved version of poll, similar to pselect.
2375 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2376 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2377 renameat, unlinkat, linkat, symlinkat, readlinkat.
2379 * New Linux kernel system calls: unshare,
2380 inotify_init, inotify_add_watch, inotify_rm_watch.
2382 * The euidaccess function is now also known by the alias eaccess,
2383 for compatibility with some other systems.
2385 * Timezone data updated to 2006b version.
2389 * The following bugs are resolved with this release:
2391 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2392 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2393 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2394 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2395 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2396 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2398 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2400 * As of this release, GCC 4 can be used to compile the C Library.
2402 * Timezone data updated to 2005m version.
2406 * The following bugs are resolved with this release:
2408 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2409 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2410 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2411 777, 787, 821, 822, 823, 825
2413 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2417 * Support for RFC 3678. Real implementations exist only for Linux so far.
2418 Implemented by Ulrich Drepper.
2420 * nscd can now cache entries persistently. Expiring entries are reloaded.
2421 For speedups the cache can be shared in memory with client processes.
2422 Implemented by Ulrich Drepper.
2424 * nscd can now perform SELinux checks.
2425 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2427 * getaddrinfo queries are now cached. Canonical name lookup is performed
2429 Implemented by Ulrich Drepper.
2431 * The nothrow function attribute is used when headers are used by gcc when
2432 compiling C code. This can avoid significant amounts of exception
2435 * The malloc functions perform more error checking and are stricter when
2436 it comes to reacting on errors. The default action is to terminate
2437 the process after showing an error message. Implemented by Ulrich Drepper.
2439 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2440 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2442 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2443 namespaces using the new function dlmopen(). This feature is of course,
2444 like most other dynamic loading functionality, not available in statically
2445 linked applications. Implemented by Ulrich Drepper.
2447 * Low-overhead boundary checking variants of string and some stdio functions
2448 were added. These are to be used in conjunction with a gcc patch by
2449 Jakub Jelinek which adds calls to these functions if possible.
2450 Implemented by Jakub Jelinek and Ulrich Drepper.
2452 * Old code for several operating systems and machine architectures that
2453 have not been in working condition in a long time have been removed from
2454 the main source tree maintained by the GNU C Library's maintainers.
2455 These files are now reside in the separate `ports' source module
2456 that is usable as an add-on when building the library.
2460 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2461 interrogate the dynamic linker, compatible with the Solaris interface.
2463 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2464 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2466 * getifaddrs now uses the netlink interface on Linux to get its information.
2467 Implemented by Thorsten Kukuk.
2469 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2470 Implemented by Ulrich Drepper.
2472 * support for non-executable stacks on x86 has been added. Changes mostly
2475 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2478 * getaddrinfo now performs destination address selection according to
2483 * Thread-safe interfaces for many functions that access locale data
2484 were added in version 2.3, but these features were omitted from NEWS.
2485 Many functions have variants with an `_l' suffix that take a `locale_t'
2486 object as a parameter rather than consulting the current locale.
2487 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2488 create and maintain `locale_t' objects. Additionally, the new function
2489 `uselocale' sets "the current locale" (as used by functions not so
2490 parameterized) set for an individual thread. These features were added
2491 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2493 * The functions getresuid, getresgid, setresuid, and setresgid, which
2494 have long been available on Linux, are now declared in <unistd.h>
2495 and are now also available on the Hurd.
2497 * ELF thread-local storage support (TLS) now works on x86-64.
2499 * The new dynamic string token $LIB is expanded in shared library names.
2500 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2502 * Aldy Hernandez contributed complete software floating point support for
2503 PowerPC machines with no FPU.
2505 * fexecve is implemented on Linux.
2507 * The `btowc' function should work at least twice as fast due to
2508 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2510 * With approriate thread add-ons cancelable functions are now implemented
2511 in libc.so as well. No need to call the function in libpthread. This
2512 change allowed to finally disable the incorrect and expensive handling
2513 of weak definition in ld.so.
2515 * Yet more PLT entries in libc.so have been removed. We finally arrived
2516 at the bare minimum. Startup times improved appropriately.
2518 * Support for the new Linux/x86 system call interface was added. The
2519 AT_SYSINFO auxiliary vector entry is recognized and handled.
2523 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2526 * iconv (the program and the interface) now accepts empty names (excluding
2527 options like //TRANSLIT) to mean "use charset of current locale".
2529 * localedef can now transliterate characters in strings which are not in
2530 the provided charmap. The information from the input locale is used.
2532 * Prelinking support was added for ELF targets. This requires additional
2533 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2535 * Read-only stdio streams now use mmap to speed up operation by eliminating
2536 copying and buffer underflows. To use add 'm' to the mode string of
2537 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2539 * The malloc functions were completely rewritten by Wolfram Gloger based
2540 on Doug Lea's malloc-2.7.0.c.
2542 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2543 implementation of regex.
2545 * Bruno Haible upgraded the iconv and locale implementation to support
2548 * Contents of the LC_* and LANG environment variables in the CEN style are
2549 not recognized anymore. It never was used. Change by Ulrich Drepper.
2551 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2552 thread-local storage (TLS) ABI on some platforms.
2553 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2555 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2556 EUC-JISX0213, and TSCII.
2558 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2559 BSD-compatible interface for getting all network interface addresses.
2560 Implementation for IPv4 by Roland McGrath.
2562 * Loading of locale data is faster due to the introduction of a locale
2563 archive. Implemented by Roland McGrath and Ulrich Drepper.
2565 * Startup times are significantly reduced by not using exported functions
2566 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2569 * Steven Munroe contributed a port to PowerPC64/Linux.
2573 * The Hurd now uses the GNU libio implementation of stdio rather than the
2574 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2576 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2577 with the same behavior as the Linux system call of the same name.
2581 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2582 128-bit long double format.
2584 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2585 IBM1161, and IBM1162 charsets.
2587 * Andreas Jaeger contributed a port to x86-64/Linux.
2589 * Peter Bruin contributed a port to PowerPC/Hurd.
2591 * libc functions using I/O streams now can handle wide-oriented streams
2594 * optimizations in the dynamic linker. Binaries created by recent binutils
2595 versions start up quicker due to reduced time spent on relocations.
2597 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2601 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2602 asinh, atanh, j0 for the 128-bit long double format.
2604 * Bruno Haible updated all the code handling Unicode in some form to
2605 support Unicode 3.1.
2607 * Speed of regex for single-byte locales is back to previous levels.
2608 Patch by Isamu Hasegawa.
2610 * Alpha, SPARC, and IA-64 now also using floating stacks.
2612 * Startup time of internationalized applications greatly improved through
2613 iconv cache. Use iconvconfig to generate the cache file.
2614 Contributed by Ulrich Drepper.
2616 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2617 severe performance problems. Patch by David Mosberger.
2619 * The Hurd port got a lot more functionality like AIO, various stdio
2620 extensions, etc. Mainly done by Roland McGrath.
2622 * mtrace can now lookup symbols in shared libraries.
2626 * Intel's IA-64 math library is largely integrated. It provides fast and
2627 accurate implementatations for most basic and standard math functions
2628 in float, double, and long double format.
2630 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2631 and asin for the 96-bit long double format and asin, log, tan for the
2632 128-bit long double format.
2634 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2635 The basic double functions exist today. Contributed by Abraham Ziv
2636 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2637 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2639 * An asynchronous name lookup library was added. The interface is designed
2640 after POSIX AIO. The proposal was circulated beforehand to get comments.
2641 No negative ones came in. Implemented by Ulrich Drepper.
2643 * Port to S390/64bit contributed by Martin Schwidefsky
2644 <schwidefsky@de.ibm.com>.
2646 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2647 of functions for Linux/IA-64.
2649 * The RPC code is now thread safe. Threads can now use the same service
2650 of different services at the same time. Patch by Eric Norum
2651 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2653 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2654 family of functions for Linux/S390.
2656 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2657 of functions for Linux/x86.
2659 * Port to Linux/CRIS contributed by Axis Communications.
2663 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2664 we can now check for namespace violations and missing declarations. The
2665 result is that almost all headers are now Unix-compliant (as defined in
2666 the upcoming XPG6). The negative side is that some programs might need
2667 corrections, too, if they depend on the incorrect form of the headers in
2668 previous versions which defined too many symbols and included too many
2671 * regex now handles multibyte character sets correctly.
2672 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2674 * iconv (the program) does now conform to the upcoming XPG6 and handles
2675 charmaps. Instead of the charset names the path of charmaps can be
2676 provided and the conversion happens based on this data.
2677 Contributed by Ulrich Drepper.
2679 * The locale program now provides detailed information about the installed
2684 only lists the names of the supported locales
2688 provides details such as country, language, and codeset name.
2689 Contributed by Ulrich Drepper.
2693 * The gencat program now parses the input file according to the charset
2694 selected by the LC_CTYPE category. This is important for stateful
2695 character sets. To make generating catalogs easier there is a way
2696 to overwrite the charset selected by the locale: before the first
2697 message or $ quote line the catalog can contain a line like
2699 $ codeset=ISO-8859-2
2701 to select the charset (ISO-8859-2 in this case).
2703 Implemented by Shinya Hanataka and Ulrich Drepper.
2705 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2706 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2707 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2709 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2710 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2712 * The LANGUAGE environment variable is now ignored unless the locale is
2713 changed from the default "C" locale.
2715 * The usual bug fixes.
2719 * Greg McGary added runtime support for bounds checking using gcc's
2720 new -fbounded-pointers option. ix86 target is complete. PowerPC
2723 * Thorsten Kukuk added secure mode support to nscd.
2725 * The Berkeley db libraries have been removed.
2727 Related, the nss_db module is now in a separate package since it
2728 obviously requires a database library being available.
2730 * Wide character I/O streams implemented by Ulrich Drepper.
2732 * Functions from the extended socket API added by Ulrich Drepper.
2734 * Functions feenableexcept and fedisableexcept to control the
2735 behaviour of individual exceptions have been added by Andreas Jaeger.
2737 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2739 * The resolver code has been updated from bind 8.2.3-T5B which supports
2740 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2743 This change could in some situations effect backward compatibility. Since
2744 now `_res' is a thread-local instead of a global variable, modifying it
2745 in one thread does not have any effect in other threads.
2747 The resolver library was also extended to allow IPv6 as the transport
2748 protocol for the requests. This work was done by Stig Venaas.
2750 * Compatibility code for K&R C compilers has been removed from the
2751 header files. A ISO C compiler is needed to use the library
2752 (conforming to either C89 or C99 standard).
2754 * Complete rewrite of the localedef program to support multibyte character
2755 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2756 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2757 Implemented by Ulrich Drepper.
2759 Bruno Haible significantly improved the generation and use of the data
2760 structures for the wide character tables.
2762 * Plural handling in gettext implemented by Ulrich Drepper.
2764 * The utmp daemon has been removed.
2766 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2768 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2771 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2773 * POSIX barriers implemented by Kaz Kylheku.
2775 * POSIX spawn function family implemented by Ulrich Drepper.
2777 * POSIX spinlocks are now available.
2779 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2781 * the configure option --enable-kernel=X.Y.Z allows to strip out
2782 compatibility for kernel versions before X.Y.Z. This is currently only
2783 implemented for Linux.
2785 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2786 field sin6_scope_id. This means that all programs using IPv6 should be
2787 recompiled. Don't expect binary compatibility with previous glibc
2790 * various conversion modules for IBM character sets contributed by
2793 * IA-64 port by Jes Sorensen and HJ Lu.
2807 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2809 * New xdr functions are added; some rpc functions are now 64bit clean.
2811 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2813 * Fixed known incompatibilities with glibc 2.0.
2815 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2817 * Optimized a number of functions (especially the ELF dynamic loader).
2819 * Update timezone data files.
2821 * lots of charmaps corrections
2823 * some new locale definitions and charmaps
2828 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2829 conform to POSIX member type requirements. Symbol versions have been
2830 adjusted as needed within the library, and for direct use by applications,
2831 but there is potential for problems if third-party libraries use
2832 struct timeval as part of their interface. This does not present
2833 a problem for X and other "essential" system libraries.
2835 * An additional locale model to support C++ Standard Library locale
2836 model and probably more was implemented by Ulrich Drepper.
2838 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2841 * Miles Bader provided the `argp' function family to support hierachical
2842 command line argument parsing, layered on top of getopt.
2844 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2846 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2849 * scanf recognizes the %a and %A format for scanning floating point numbers.
2851 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2852 information and interfaces for the available integer types.
2854 * about 130 new math functions were added to implement the ISO C9x math
2857 * the new header <complex.h> contains definitions of the complex math
2858 functions from ISO C 9X.
2860 * the new header <tgmath.h> defines generic macros to use complex or
2861 real valued functions.
2863 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2865 * Andreas Jaeger provided a test suite for the math library.
2867 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2869 * Ulrich Drepper added character set conversion functions (iconv).
2871 * Optimized string functions have been added.
2873 * The localedata addon is now part of glibc.
2875 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2877 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2878 daemon for NSS (nscd).
2880 Missing a better place here are some numbers on improvements. Under
2881 Linux 2.1.125 un-tar-ing the kernel sources takes
2885 using local files 12.19s 6.88s 22.91s
2887 using NIS 13.92s 8.91s 26.34s
2889 using NIS & nscd 10.37s 7.34s 25.30s
2891 using NIS+ 27.57s 30.37s 640.46s
2893 using NIS+ & nscd 10.25s 7.83s 26.51s
2895 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2897 Keep in mind that non-namelookup related operations dominate above times.
2898 It was just a common complain that using NIS+ unpacking the kernel is
2901 [1] The old nscd implementation is not available anymore since it was
2902 distributed with glibc up to version 2.0.98 and thus is now replaced.
2904 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2906 * Mark Kettenis provided a Hesiod NSS module.
2908 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2909 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2911 * rcmd can now handle netgroups (Dick Streefland).
2913 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2916 * Support for the IPv6 protocol has been added to the socket API, as per the
2917 latest draft standards.
2919 * Support for Linux 2.2 has been added.
2921 * Interface changes relative to the latest 2.0.x release:
2922 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2923 addseverity NEW: Unix98
2924 alphasort64 NEW: LFS
2925 argp_err_exit_status NEW: argp, GNU ext
2926 argp_error NEW: argp, GNU ext
2927 argp_failure NEW: argp, GNU ext
2928 argp_help NEW: argp, GNU ext
2929 argp_parse NEW: argp, GNU ext
2930 argp_program_bug_address NEW: argp, GNU ext
2931 argp_program_version NEW: argp, GNU ext
2932 argp_program_version_hook NEW: argp, GNU ext
2933 argp_state_help NEW: argp, GNU ext
2934 argp_usage NEW: argp, GNU ext
2935 authdes_create NEW: Secure RPC
2936 authdes_getucred NEW: Secure RPC
2937 authdes_pk_create NEW: Secure RPC
2938 backtrace NEW: GNU ext.
2939 backtrace_symbols NEW: GNU ext.
2940 backtrace_symbols_fd NEW: GNU ext.
2942 cacosf NEW: ISO C 9x
2943 cacosh NEW: ISO C 9x
2944 cacoshf NEW: ISO C 9x
2945 cacoshl NEW: ISO C 9x
2946 cacosl NEW: ISO C 9x
2953 casinf NEW: ISO C 9x
2954 casinh NEW: ISO C 9x
2955 casinhf NEW: ISO C 9x
2956 casinhl NEW: ISO C 9x
2957 casinl NEW: ISO C 9x
2959 catanf NEW: ISO C 9x
2960 catanh NEW: ISO C 9x
2961 catanhf NEW: ISO C 9x
2962 catanhl NEW: ISO C 9x
2963 catanl NEW: ISO C 9x
2964 cbc_crypt NEW: Secure RPC
2968 ccoshf NEW: ISO C 9x
2969 ccoshl NEW: ISO C 9x
2975 cimagf NEW: ISO C 9x
2976 cimagl NEW: ISO C 9x
2977 clearerr_locked REMOVED
2978 clntunix_create NEW: sunrpc ext
2980 clog10 NEW: ISO C 9x
2981 clog10f NEW: ISO C 9x
2982 clog10l NEW: ISO C 9x
2992 cprojf NEW: ISO C 9x
2993 cprojl NEW: ISO C 9x
2995 crealf NEW: ISO C 9x
2996 creall NEW: ISO C 9x
3001 csinhf NEW: ISO C 9x
3002 csinhl NEW: ISO C 9x
3005 csqrtf NEW: ISO C 9x
3006 csqrtl NEW: ISO C 9x
3010 ctanhf NEW: ISO C 9x
3011 ctanhl NEW: ISO C 9x
3013 des_setparity NEW: Secure RPC
3014 ecb_crypt NEW: Secure RPC
3015 endutxent NEW: Unix98
3017 exp10f NEW: ISO C 9x
3018 exp10l NEW: ISO C 9x
3022 fattach NEW: STREAMS
3023 fdetach NEW: STREAMS
3027 feclearexcept NEW: ISO C 9x
3028 fegetenv NEW: ISO C 9x
3029 fegetexceptflag NEW: ISO C 9x
3030 fegetround NEW: ISO C 9x
3031 feholdexcept NEW: ISO C 9x
3033 feraiseexcept NEW: ISO C 9x
3034 ferror_locked REMOVED
3035 fesetenv NEW: ISO C 9x
3036 fesetexceptflag NEW: ISO C 9x
3037 fesetround NEW: ISO C 9x
3038 fetestexcept NEW: ISO C 9x
3039 feupdateenv NEW: ISO C 9x
3040 fflush_locked REMOVED
3044 fgets_unlocked NEW: GNU ext.
3045 fileno_locked REMOVED
3057 fputc_locked REMOVED
3058 fputs_unlocked NEW: GNU ext.
3059 fread_unlocked NEW: GNU ext.
3064 fstatvfs NEW: Unix98
3068 ftruncate64 NEW: LFS
3070 fwrite_unlocked NEW: GNU ext.
3071 gai_strerror NEW: IPv6
3075 getchar_locked REMOVED
3077 getdate_err NEW: Unix98
3078 getdate_r NEW: GNU ext.
3080 getnameinfo NEW: IPv6
3081 getnetname NEW: Secure RPC
3082 getpmsg NEW: STREAMS
3083 getpt NEW: Unix98 PTY
3084 getrlimit64 NEW: LFS
3085 getutxent NEW: Unix98
3086 getutxid NEW: Unix98
3087 getutxline NEW: Unix98
3088 glob64 NEW: GNU ext.
3089 globfree64 NEW: GNU ext.
3090 gnu_get_libc_release NEW: GNU ext.
3091 gnu_get_libc_version NEW: GNU ext.
3092 grantpt NEW: Unix98 PTY
3093 host2netname NEW: Secure RPC
3095 iconv_close NEW: iconv
3096 iconv_open NEW: iconv
3097 if_freenameindex NEW: IPv6
3098 if_indextoname NEW: IPv6
3099 if_nameindex NEW: IPv6
3100 if_nametoindex NEW: IPv6
3101 in6addr_any NEW: IPv6
3102 in6addr_loopback NEW: IPv6
3103 inet6_isipv4mapped NEW: IPv6
3104 isastream NEW: STREAMS
3105 iswblank NEW: GNU ext.
3106 key_decryptsession NEW: Secure RPC
3107 key_decryptsession_pk NEW: Secure RPC
3108 key_encryptsession NEW: Secure RPC
3109 key_encryptsession_pk NEW: Secure RPC
3110 key_gendes NEW: Secure RPC
3111 key_get_conv NEW: Secure RPC
3112 key_secretkey_is_set NEW: Secure RPC
3113 key_setnet NEW: Secure RPC
3114 key_setsecret NEW: Secure RPC
3115 llrint NEW: ISO C 9x
3116 llrintf NEW: ISO C 9x
3117 llrintl NEW: ISO C 9x
3118 llround NEW: ISO C 9x
3119 llroundf NEW: ISO C 9x
3120 llroundl NEW: ISO C 9x
3125 lrintf NEW: ISO C 9x
3126 lrintl NEW: ISO C 9x
3127 lround NEW: ISO C 9x
3128 lroundf NEW: ISO C 9x
3129 lroundl NEW: ISO C 9x
3131 makecontext NEW: Unix98
3132 mempcpy NEW: GNU ext.
3135 modify_ldt NEW: kernel
3139 nearbyint NEW: ISO C 9x
3140 nearbyintf NEW: ISO C 9x
3141 nearbyintl NEW: ISO C 9x
3142 netname2host NEW: Secure RPC
3143 netname2user NEW: Secure RPC
3144 nexttoward NEW: ISO C 9x
3145 nexttowardf NEW: ISO C 9x
3146 nexttowardl NEW: ISO C 9x
3150 passwd2des NEW: Secure RPC
3152 pow10f NEW: GNU ext.
3153 pow10l NEW: GNU ext.
3156 printf_size NEW: GNU ext.
3157 printf_size_info NEW: GNU ext.
3158 profil_counter REMOVED
3159 pthread_mutexattr_getkind_np REPLACED
3160 pthread_mutexattr_setkind_np REPLACED
3161 ptsname NEW: Unix98 PTY
3162 ptsname_r NEW: Unix98 PTY
3164 putchar_locked REMOVED
3165 putgrent NEW: GNU ext.
3167 putpmsg NEW: STREAMS
3168 pututxline NEW: Unix98
3172 readdir64_r NEW: LFS
3173 remquo NEW: ISO C 9x
3174 remquof NEW: ISO C 9x
3175 remquol NEW: ISO C 9x
3177 roundf NEW: ISO C 9x
3178 roundl NEW: ISO C 9x
3180 scalbln NEW: ISO C 9x
3181 scalblnf NEW: ISO C 9x
3182 scalblnl NEW: ISO C 9x
3184 sendfile NEW: kernel
3185 setcontext NEW: Unix98
3186 setrlimit64 NEW: LFS
3187 setutxent NEW: Unix98
3189 sigignore NEW: Unix98
3190 sigqueue NEW: POSIX.1b
3191 sigrelse NEW: Unix98
3192 sigset NEW: POSIX.1b
3193 sigtimedwait NEW: POSIX.1b
3194 sigwaitinfo NEW: POSIX.1b
3195 sincos NEW: GNU ext.
3196 sincosf NEW: GNU ext.
3197 sincosl NEW: GNU ext.
3201 strcasestr NEW: GNU ext.
3202 strtoimax NEW: ISO C 9x
3203 strtoumax NEW: ISO C 9x
3204 strverscmp NEW: GNU ext.
3205 svcauthdes_stats NEW: Secure RPC
3206 svcunix_create NEW: sunrpc etx
3207 svcunixfd_create NEW: sunrpc ext
3208 swapcontext NEW: Unix98
3209 tcgetsid NEW: Unix98 PTY
3210 tdestroy NEW: GNU ext.
3211 tgamma NEW: ISO C 9x
3212 tgammaf NEW: ISO C 9x
3213 tgammal NEW: ISO C 9x
3217 truncf NEW: ISO C 9x
3218 truncl NEW: ISO C 9x
3220 unlockpt NEW: Unix98 PTY
3221 updwtmpx NEW: Unix98
3222 user2netname NEW: Secure RPC
3223 utmpxname NEW: Unix98
3224 versionsort NEW: GNU ext.
3225 versionsort64 NEW: GNU ext.
3227 wcscasecmp NEW: GNU ext.
3228 wcsncasecmp NEW: GNU ext.
3229 wcsnlen NEW: GNU ext.
3230 wcstoimax NEW: ISO C 9x
3231 wcstoll NEW: ISO C 9x
3232 wcstoull NEW: ISO C 9x
3233 wcstoumax NEW: ISO C 9x
3235 wordexp NEW: POSIX.2
3236 wordfree NEW: POSIX.2
3237 write_profiling REMOVED
3238 xdecrypt NEW: Secure RPC
3239 xdr_authdes_cred NEW: Secure RPC
3240 xdr_authdes_verf NEW: Secure RPC
3241 xdr_cryptkeyarg NEW: Secure RPC
3242 xdr_cryptkeyarg2 NEW: Secure RPC
3243 xdr_cryptkeyres NEW: Secure RPC
3244 xdr_getcredres NEW: Secure RPC
3245 xdr_key_netstarg NEW: Secure RPC
3246 xdr_key_netstres NEW: Secure RPC
3247 xdr_keybuf NEW: Secure RPC
3248 xdr_keystatus NEW: Secure RPC
3249 xdr_netnamestr NEW: Secure RPC
3250 xdr_sizeof NEW: Secure RPC
3251 xdr_unixcred NEW: sunrpc ext
3252 xencrypt NEW: Secure RPC
3253 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3264 * inet_ntoa is thread-safe
3266 * updwtmp is moved from libutil to libc
3268 * rewrite of cbrt function
3270 * update of timezone data
3284 * add atoll function
3286 * fix complex problems in Berkeley DB code
3288 * fix math functions
3292 * fixed lots of header problems (especially Linux/GNU specific)
3294 * dynamic loader preserves all registers
3296 * Roland McGrath provided support for handling of auxiliary objects in
3297 the ELF dynamic loader.
3299 * support for parallel builds is improved
3303 * GNU extensions are no longer declared by default. To enable them you
3304 must define the macro `_GNU_SOURCE' in your program or compile with
3307 * The library has changed from using GNU ld symbol aliases to using weak
3308 symbols where available. The ELF object file format supports weak
3309 symbols; GNU ld also supports weak symbols in the a.out format. (There
3310 is also now support for other GNU ld extensions in ELF. Use the
3311 `--with-elf' option to configure to indicate you have ELF, and
3312 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3313 of many files which contained only symbol aliases, reducing the size of
3314 the source and the compiled library; many other files were renamed to
3315 less cryptic names previously occupied by the symbol alias files.
3316 There is a new header file <elf.h> for programs which operate on
3317 files in the ELF format.
3319 * Converted to Autoconf version 2, so `configure' has more options.
3320 Run `configure --help' to see the details.
3322 * The library can now be configured to build profiling, highly-optimized
3323 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3324 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3325 `configure' enable building these extra libraries. The shared library is
3326 built by default when using both ELF and GNU ld. When shared libraries
3327 are enabled, the new library `-ldl' is available for arbitrary run-time
3328 loading of shared objects; its interface is defined in <dlfcn.h>. The
3329 new header file <link.h> gives access to the internals of the run-time
3330 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3331 application of same name on other systems and it provides information
3332 about dynamically linked binaries.
3334 * The C library now provides the run-time support code for profiling
3335 executables compiled with `-pg'. Programs can control the profiling code
3336 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3337 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3338 the support for this file format was contributed by David Mosberger-Tang.
3340 * The math code has been replaced with a math library based on fdlibm from
3341 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3342 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3343 functions. The math functions now reside in a separate library, so
3344 programs using them will need to use `-lm' their linking commands.
3346 * John C. Bowman contributed optimized ix87 assembler inline functions.
3348 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3349 mechanism similar to that found in Solaris 2. This is now used for the
3350 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3351 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3352 file controls what services are used for each individual database. This
3353 works by loading shared libraries with names specified in `nsswitch.conf',
3354 so service modules can be changed or added at any time without even
3355 relinking any program. Currently there are the file, db, and NIS based
3356 NSS services available.
3358 * The new functions `strtoq' and `strtouq' parse integer values from
3359 strings, like `strtol' and `strtoul', but they return `long long int' and
3360 `unsigned long long int' values, respectively (64-bit quantities).
3362 * The new functions `strtof' and `strtold' parse floating-point values from
3363 strings, like `strtod', but they return `float' and `long double' values,
3364 respectively (on some machines `double' and `long double' are the same).
3366 * Ulrich Drepper has contributed new implementations of the floating-point
3367 printing and reading code used in the `printf' family of functions and
3368 `strtod', `strtof', and `strtold'. These new functions are perfectly
3369 accurate, and much faster than the old ones.
3371 * The implementation of the POSIX locale model was completely rewritten by
3372 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3373 to compile the POSIX locale definition.
3375 * The former dummy implementations of the strcoll and strxfrm function are
3376 now replaced by fully functional code contributed by Ulrich Drepper. The
3377 collation information comes from the POSIX locale definitions.
3379 * The new header <langinfo.h> defines an interface for accessing
3380 various locale-dependent data (using the locale chosen with `setlocale').
3382 * Ulrich Drepper has contributed a new suite of functions for operation on
3383 wide-character and multibyte-character strings, in <wchar.h>;
3384 and classification and case conversion of wide characters, in <wctype.h>.
3385 These new functions are conforming to the ISO C, Amendement 1 specification.
3387 * There is now a second implementation of the standard I/O library available.
3388 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3389 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3391 * You can now use positional parameter specifications in format strings
3392 for the `printf' and `scanf' families of functions. For example,
3393 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3394 ``Number 6, Mr Jones''. This is mainly useful when providing different
3395 format strings for different languages, whose grammars may dictate
3396 different orderings of the values being printed. To support this
3397 feature, the interface for `register_printf_handler' has changed; see
3398 the header file <printf.h> for details.
3400 * The `printf' and `scanf' families of functions now understand a new
3401 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3402 to group numbers as indicated by the locale; for `scanf' and friends, this
3403 says to accept as valid only a number with all the proper grouping
3404 separators in the right places. In the default "C" locale, numbers are
3405 not grouped; but locales for specific countries will define the usual
3406 conventions (i.e. separate thousands with `,' in the US locale).
3408 * The pgrp functions have been regularized, slightly incompatibly but much
3409 less confusingly. The core functions are now `getpgid' and `setpgid',
3410 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3411 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3412 provided for compatibility. There is no longer an incompatible `getpgrp'
3413 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3415 * The new header file <fts.h> and suite of functions simplify programs that
3416 operate on directory trees. This code comes from 4.4 BSD.
3418 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3419 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3420 NSS scheme used in glibc.
3422 * There is a new malloc debugging hook `__memalign_hook'.
3424 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3425 `unsigned int' in <sys/types.h>. These are for compatibility only and
3426 their use is discouraged.
3428 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3429 done differently, so that it works even without GNU ld.
3431 * New function `euidaccess' checks allowed access to a file like `access',
3432 but using the effective IDs instead of the real IDs.
3434 * The time zone data files have been updated for the latest and greatest
3435 local time conventions of the countries of the world.
3437 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3440 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3441 for formatting floating-point numbers. They are provided only for
3442 compatibility; new programs should use `sprintf' instead. There are
3443 also equivalent function for the `long double' floating-point type and
3444 all functions also exist in a reentrant form.
3446 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3447 functions for maintaining the login-record files (primarily of use to
3448 system programs such as `login'), and convenient functions for
3449 allocating and initializing a pseudo-terminal (pty) device.
3451 * Ulrich Drepper has contributed new support for System V style
3452 shared memory and IPC on systems that support it.
3454 * Ulrich Drepper has contributed several miscellaneous new functions found
3455 in System V: The `hsearch' family of functions provide an effective
3456 implementation of hash tables; `a64l' and `l64a' provide a very simple
3457 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3460 * Ulrich Drepper has contributed new reentrant counterparts for the
3461 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3463 * Ulrich Drepper has contributed new, highly-optimized versions of several
3464 string functions for the i486/Pentium family of processors.
3466 * Ulrich Drepper has updated the Linux-specific code, based largely
3467 on work done in Hongjiu Lu's version of GNU libc for Linux.
3468 The GNU library now supports Linux versions 2.0.10 and later,
3469 using the ELF object file format (i[3456]86-*-linux).
3471 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3473 * David Mosberger-Tang and Richard Henderson have ported the C library
3474 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3475 dynamic linking support for ELF/Alpha.
3477 * Richard Henderson contributed several Alpha optimized assembler function
3478 for arithmetic and string handling.
3480 * Ulrich Drepper has contributed a new set of message catalog functions to
3481 support multiple languages using the <libintl.h> interface, for use with
3482 his new package GNU gettext. Translation volunteers have contributed
3483 catalogs of the library's messages in Spanish, German, and Korean.
3485 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3486 program and the `catgets' function for reading the catalog files it
3487 creates. (The <libintl.h> interface is preferred; we include the
3488 <nl_types.h> interface using `catgets' only for source compatibility with
3489 programs already written to use it.)
3491 * New header file <values.h> gives SVID-compatible names for <limits.h>
3494 * Various new macros, declarations, and small header files for compatibility
3497 * New function `group_member' is a convenient way to check if a process has
3498 a given effective group ID.
3500 * When using GCC 2.7 and later, the socket functions are now declared in a
3501 special way so that passing an argument of type `struct sockaddr_in *',
3502 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3503 `struct sockaddr *' type, does not generate a type-clash warning.
3505 * New function `error' declared in header file <error.h> is a convenient
3506 function for printing error messages and optionally exiting; this is the
3507 canonical function used in GNU programs. The new functions `err', `warn',
3508 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3509 doing the same thing.
3511 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3512 POSIX.2 `glob' function to do ~ and {...} expansion.
3514 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3515 `clearenv' which is used in POSIX.9 is also available.
3517 * New function `getsid' returns session ID number on systems that support it.
3519 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3520 files <db.h> and <mpool.h> provide a rich set of functions for several
3521 types of simple databases stored in memory and in files, and <ndbm.h> is
3522 an old `ndbm'-compatible interface using the `db' functions. Link with
3523 `-ldb' to get these functions.
3525 * New macro `strdupa' copies a string like `strdup', but uses local stack
3526 space from `alloca' instead of dynamic heap space from `malloc'.
3528 * New function `strnlen' is like `strlen' but searches only a given maximum
3529 number of characters for the null terminator. `stpncpy', `strndup' and
3530 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3533 * New function `statfs' in header <sys/statfs.h>.
3535 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3536 provide convenient functions for operating on blocks of null-terminated
3539 * A new suite of functions in <utmp.h> handle all the details of reading
3540 and writing the utmp file.
3542 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3545 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3546 completely POSIX compliant and also implemented the extended functionality
3547 to handle alternate digit representation and alternate era date formats.
3549 * Ulrich Drepper provided an implementation of the `strptime' function
3550 defined in XPG4.2 which transforms a string into a `struct tm' value.
3552 * Paul Eggert provided the tzselect shell script as part of the timezone
3553 code. The shell script makes it easy to select the correct timezone
3556 * The implementation of the malloc family of functions is completely replaced
3557 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3558 The implementation uses the mmap function (if available) and it is
3559 optimized for the use in multi threaded programs.
3561 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3562 functions. This new functionality is usable by specifying a special
3563 salt string and it is compatible with implementation on *BSD systems.
3565 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3566 `getsubopt' to handle second level command line options, `bsd_signal'
3567 to access BSD style `signal' functionality, the obsolete `regexp' style
3570 * the `lchown' function is available on system which support this
3573 * The implementation of the shadow password handling function was contributed
3576 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3578 * POSIX.1g support was added. The <sys/select.h> header is available,
3579 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3580 implementation of `getaddrinfo'.
3584 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3586 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3587 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3589 * The new function `daemon' from 4.4 BSD is useful for server programs that
3590 want to put themselves in the background.
3592 * Joel Sherrill has contributed support for several standalone boards that
3593 run without an operating system.
3595 * `printf', `scanf' and friends now accept a `q' type modifier for long
3596 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3598 * All of the code taken from BSD (notably most of the math and networking
3599 routines) has been updated from the BSD 4.4-Lite release.
3601 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3603 * The new functions `getdomainname' and `setdomainname' fetch or change the
3604 YP/NIS domain name. These are system calls which exist on systems which
3607 * The time zone data files have been updated for the latest international
3610 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3611 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3615 * The C library now includes support for Sun RPC, from Sun's free
3616 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3617 are included. (There is still no support for YP.)
3619 * Tom Quinn has contributed a port of the C library to SGI machines running
3620 Irix 4 (mips-sgi-irix4).
3622 * The new `lockf' function is a simplified interface to the locking
3623 facilities of `fcntl', included for compatibility.
3625 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3627 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3629 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3632 * The error message printed by `assert' for a failed assertion now includes
3633 the name of the program (if using GNU ld) and the name of the calling
3634 function (with versions of GCC that support this).
3636 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3638 * The library now includes the <sys/mman.h> header file and memory
3639 management functions `mmap', `munmap', `mprotect', `msync', and
3640 `madvise', on systems that support those facilities.
3642 * The interface for `mcheck' has changed slightly: the function called to
3643 abort the program when an allocation inconsistency is detected now takes
3644 an argument that indicates the type of failure. The new function
3645 `mprobe' lets you request a consistency check for a particular block at
3646 any time (checks are normally done only when you call `free' or `realloc'
3649 * It is now possible to easily cross-compile the C library, building on one
3650 system a library to run on another machine and/or operating system. All
3651 you need to do is set the variable `HOST_CC' in `configparms' to the
3652 native compiler for programs to run on the machine you are building on (a
3653 few generator programs are used on Unix systems); set `CC' to the
3656 * The new function `fexecve' (only implemented on the GNU system) executes
3657 a program file given a file descriptor already open on the file.
3661 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3662 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3664 * You can set the variable `libprefix' in `configparms' to specify a prefix
3665 to be prepended to installed library files; this makes it easy to install
3666 the GNU C library to be linked as `-lgnuc' or whatever.
3668 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3669 copies a limited number of characters from a string, and returns the
3670 address of the last character written.
3672 * You no longer need to check for whether the installed `stddef.h' is
3673 compatible with the GNU C library. configure now checks for you.
3675 * You can now define a per-stream `fileno' function to convert the
3676 stream's cookie into an integral file descriptor.
3678 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3679 allocates zero bytes of storage, and returns a unique pointer which
3680 you can pass to `realloc' or `free'. The behavior is undefined if
3681 you dereference this pointer.
3683 * The C library now runs on Sony NEWS m68k machines running either
3684 NewsOS 3 or NewsOS 4.
3686 * The new `syscall' function is a system-dependent primitive function
3687 for invoking system calls. It has the canonical behavior on Unix
3688 systems, including unreliable return values for some calls (such as
3689 `pipe', `fork' and `getppid').
3691 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3692 to `EAGAIN', which is the preferred name. On systems whose kernels
3693 use two distinct codes, the C library now translates EWOULDBLOCK to
3694 EAGAIN in every system call function.
3698 * The GNU C Library Reference Manual is now distributed with the library.
3699 `make dvi' will produce a DVI file of the printed manual.
3700 `make info' will produce Info files that you can read on line using C-h i
3701 in Emacs or the `info' program.
3702 Please send comments on the manual to bug-glibc-manual@gnu.org.
3704 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3706 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3708 * Jason Merrill has contributed a port to the Sequent Symmetry running
3709 Dynix version 3 (i386-sequent-dynix).
3711 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3712 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3714 * New function `memory_warnings' lets you arrange to get warnings when
3715 malloc is running out of memory to allocate, like Emacs gives you.
3717 * The C library now contains the relocating allocator used in Emacs 19 for
3718 its editing buffers. This allocator (ralloc) minimizes allocation
3719 overhead and fragmentation by moving allocated regions around whenever it
3720 needs to. You always refer to a ralloc'd region with a "handle" (a
3721 pointer to a pointer--an object of type `void **').
3723 * There is a new `printf' format: `%m' gives you the string corresponding
3724 to the error code in `errno'.
3726 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3727 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3728 pass, the `a' modifier says to fill in a `char **' you pass with a
3731 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3732 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3733 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3735 * `mkstemp' is a traditional Unix function to atomically create and open a
3736 uniquely-named temporary file.
3740 * The standard location for the file that says what the local timezone is
3741 has changed again. It is now `/usr/local/etc/localtime' (or more
3742 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3744 * The distribution no longer contains any files with names longer than 14
3747 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3748 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3750 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3754 * The configuration process has changed quite a bit. The `configure'
3755 script is now used just like the configuration scripts for other GNU
3756 packages. The `sysdeps' directory hierarchy is much rearranged.
3757 The file `INSTALL' explains the new scheme in detail.
3759 * The header files no longer need to be processed into ANSI C and
3760 traditional C versions. There is just one set of files to install, and
3761 it will work with ANSI or old C compilers (including `gcc -traditional').
3763 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3764 MIPS DECStation running Ultrix 4.
3766 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3767 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3768 made itself into a shared library.
3770 * Yet further improved support for the i386, running 4.3 BSD-like systems
3771 (such as Mach 3 with the Unix single-server), or System V.
3773 * New function `strncasecmp' to do case-insensitive string comparison
3774 with limited length.
3776 * New function `strsep' is a reentrant alternative to `strtok'.
3778 * New functions `scandir' and `alphasort' for searching directories.
3780 * New function `setenv' is a better interface to `putenv'.
3782 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3783 function for traversing a directory tree.
3785 * The GNU obstack package is now also part of the C library.
3786 The new function `open_obstack_stream' creates a stdio stream that
3787 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3788 formatted output directly to an obstack.
3790 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3791 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3793 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3795 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3796 things to your strings.
3798 * There are some new test programs: test-fseek, testmb, and testrand.
3800 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3801 These ports are not finished, but are a good starting place for really
3802 supporting those systems.
3804 * `/etc/localtime' is now the standard location for the file that says what
3805 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3806 This follows the general principle that `/etc' is the place for all local
3807 configuration files.
3809 * The C library header files now use `extern "C"' when used by the C++
3810 compiler, so the C library should now work with C++ code.
3812 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3813 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3816 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3817 function which uses the `merge sort' algorithm, and is said to be
3818 significantly faster than the old GNU `qsort' function. Merge sort is
3819 now the standard `qsort' function. The new algorithm can require a lot
3820 of temporary storage; so, the old sorting function is called when the
3821 required storage is not available.
3823 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3824 provides the Unix `crypt' function, plus some other entry points.
3826 * The code and header files taken from 4.4 BSD have been updated with the
3827 latest files released from Berkeley.
3829 ----------------------------------------------------------------------
3830 Copyright information:
3832 Copyright (C) 1992-2017 Free Software Foundation, Inc.
3834 Permission is granted to anyone to make or distribute verbatim copies
3835 of this document as received, in any medium, provided that the
3836 copyright notice and this permission notice are preserved,
3837 thus giving the recipient permission to redistribute in turn.
3839 Permission is granted to distribute modified versions
3840 of this document, or of portions of it,
3841 under the above conditions, provided also that they
3842 carry prominent notices stating who last changed them.
3845 version-control: never