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 10.0.0 Support: Character encoding, character type info, and
11 transliteration tables are all updated to Unicode 10.0.0, 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 * <string.h> no longer includes inline versions of any string functions,
74 as this kind of optimization is better done by the compiler. The macros
75 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
77 * The nonstandard header <xlocale.h> has been removed. Most programs should
78 use <locale.h> instead. If you have a specific need for the definition
79 of locale_t with no other declarations, please talk to us.
81 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
83 * The reallocarray function has been added to libc. It is a realloc
84 replacement with a check for integer overflow when calculating total
87 * New preadv2 and pwritev2 has been added. They are Linux extensions to
88 preadv and pwritev with an additional flag argument where it is possible
89 to set high priority or use O_DSYNC or O_SYNC for a specific IO operation.
90 For complete support it requires Linux kernel version 4.6, otherwise a
91 compat implementation will be used (which refuses all flags and routes it
92 to preadv or pwritev).
94 * The stack_t type no longer has the name struct sigaltstack. This changes
95 the C++ name mangling for interfaces involving this type.
97 * The synchronization that pthread_spin_unlock performs has been changed
98 to now be equivalent to a C11 atomic store with release memory order to
99 the spin lock's memory location. This ensures correct synchronization
100 for the spin lock's operations and critical sections protected by a spin
101 lock. Previously, several (but not all) architectures used stronger
102 synchronization (e.g., containing what is often called a full barrier).
103 This change can improve performance, but may affect odd fringe uses of
104 spin locks that depend on the previous behavior (e.g., using spin locks
105 as atomic variables to try to implement Dekker's mutual exclusion
108 * The tunables feature is now enabled by default. This allows users to tweak
109 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
111 * The s390 specific ptrace requests are adjusted to the kernel ones. Request 12
112 is now used for PTRACE_SINGLEBLOCK instead of PTRACE_GETREGS. The requests
113 PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS were
114 removed as those are not supported by the s390 kernel. The requests
115 PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
116 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
117 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND were added as those are supported
120 * The minimum GCC version that can be used to build this version of the GNU
121 C Library is GCC 4.9. Older GCC versions, and non-GNU compilers, can
122 still be used to compile programs using the GNU C Library.
124 * Support is added, on powerpc64le, x86_64 and x86, for interfaces
125 supporting the _Float128 type from ISO/IEC TS 18661-3:2015. Most of the
126 interfaces are taken from TS 18661-3. The type-generic macros in <math.h>
127 support this type, but those in <tgmath.h> do not. The GNU C Library now
128 requires GCC 6.2 or later to build for powerpc64le. When used with GCC
129 versions before GCC 7, these interfaces may be used with the type under
130 the non-standard name __float128.
132 New <stdlib.h> functions from ISO/IEC TS 18661-3:
134 - String Conversion Functions: strfromf128 and strtof128.
136 New <math.h> features from ISO/IEC TS 18661-3:
138 - Very Large Number macro: HUGE_VAL_F128.
140 - Signaling NaN macro: SNANF128.
142 - Trigonometric Functions: acosf128, asinf128, atanf128, atan2f128,
143 cosf128, sinf128, tanf128.
145 - Hyperbolic Functions: acoshf128, asinhf128, atanhf128, coshf128,
148 - Exponential and Logarithmic Functions: expf128, exp2f128, expm1f128,
149 frexpf128, ilogbf128, ldexpf128, llogbf128, logf128, log10f128,
150 log1pf128, log2f128, logbf128, modff128, scalbnf128, scalblnf128.
152 - Power and Absolute Functions: cbrtf128, fabsf128, hypotf128, powf128,
155 - Error and Gamma Functions: erff128, erfcf128, lgammaf128, tgammaf128.
157 - Nearest Integer Functions: ceilf128, floorf128, nearbyintf128,
158 rintf128, lrintf128, llrintf128, roundf128, lroundf128, llroundf128,
159 roundevenf128, truncf128, fromfpf128, ufromfpf128, fromfpxf128,
162 - Remainder Functions: fmodf128, remainderf128, remquof128.
164 - Manipulation Functions: copysignf128, nanf128, nextafterf128,
165 nextupf128, nextdownf128, canonicalizef128.
167 - Minimum, Maximum, and Positive Difference Functions: fdimf128,
168 fmaxf128, fminf128, fmaxmagf128, fminmagf128.
170 - Floating Multiply-Add Function: fmaf128.
172 - Total Order Functions: totalorderf128, totalordermagf128.
174 - Payload Functions: getpayloadf128, setpayloadf128, setpayloadsigf128.
176 New <complex.h> functions from ISO/IEC TS 18661-3:
178 - Trigonometric Functions: cacosf128, casinf128, catanf128, ccosf128,
181 - Hyperbolic Functions: cacoshf128, casinhf128, catanhf128, ccoshf128,
182 csinhf128, ctanhf128.
184 - Exponential and Logarithmic Functions: cexpf128, clogf128.
186 - Power and Absolute Functions: cabsf128, cpowf128, csqrtf128.
188 - Manipulation Functions: cargf128, cimagf128, CMPLXF128, conjf128,
189 cprojf128, crealf128.
191 The following <wchar.h> functions are added as GNU extensions:
193 - Wide String Conversion Functions: wsctof128, wcstof128_l.
195 The following <stdlib.h> function is added as a GNU extension:
197 - String Conversion Function: strtof128_l.
199 The following <math.h> features are added as GNU extensions:
201 - Predefined Mathematical Constants: M_Ef128, M_LOG2Ef128,
202 M_LOG10Ef128, M_LN2f128, M_LN10f128, M_PIf128, M_PI_2f128,
203 M_PI_4f128, M_1_PIf128, M_2_PIf128, M_2_SQRTPIf128, M_SQRT2f128,
206 - Trigonometric Function: sincosf128.
208 - Exponential and Logarithmic Function: exp10f128.
210 - Error and Gamma Function: lgammaf128_r.
212 - Bessel Functions: j0f128, j1f128, jnf128, y0f128, y1f128, ynf128.
214 The following <complex.h> function is added as a GNU extension:
216 - Exponential and Logarithmic Function: clog10f128.
218 Security related changes:
220 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
221 to avoid fragmentation-based spoofing attacks.
223 The following bugs are resolved with this release:
225 [The release manager will add the list generated by
226 scripts/list-fixed-bugs.py just before the release.]
231 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
232 24731-2:2010, is supported to enable declarations of functions from that
233 TR. Note that not all functions from that TR are supported by the GNU C
236 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
237 18661-1:2014, is supported to enable declarations of functions and macros
238 from that TS. Note that not all features from that TS are supported by
241 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
242 18661-4:2015, is supported to enable declarations of functions and macros
243 from that TS. Note that most features from that TS are not supported by
246 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
247 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
248 Since the GNU C Library defaults to a much newer revision of POSIX, this
249 will only affect programs that specifically request an old conformance
250 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
251 see a change in the visible declarations, but a program compiled with
252 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
255 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
256 defined by all multithreaded code, but glibc has not required this for
259 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
260 means that in a future release, the macros “major”, “minor”, and “makedev”
261 will only be available from <sys/sysmacros.h>.
263 These macros are not part of POSIX nor XSI, and their names frequently
264 collide with user code; see for instance glibc bug 19239 and Red Hat bug
265 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
266 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
269 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
270 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
271 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
273 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
274 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
275 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
276 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
277 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
278 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
279 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
280 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
281 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
282 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
283 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
286 * New <math.h> features are added from TS 18661-1:2014:
288 - Signaling NaN macros: SNANF, SNAN, SNANL.
290 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
291 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
292 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
294 - llogb functions: the llogb, llogbf and llogbl functions, and the
295 FP_LLOGB0 and FP_LLOGBNAN macros.
297 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
300 - Comparison macros: iseqsig.
302 - Classification macros: iscanonical, issubnormal, iszero.
304 - Total order functions: totalorder, totalorderf, totalorderl,
305 totalordermag, totalordermagf, totalordermagl.
307 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
309 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
310 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
312 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
313 are added to libc. They convert a floating-point number into string.
315 * Most of glibc can now be built with the stack smashing protector enabled.
316 It is recommended to build glibc with --enable-stack-protector=strong.
317 Implemented by Nick Alcock (Oracle).
319 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
320 intended to be used instead of memset() to erase sensitive data after use;
321 the compiler will not optimize out calls to explicit_bzero even if they
322 are "unnecessary" (in the sense that no _correct_ program can observe the
323 effects of the memory clear).
325 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
326 to float instead of double. This does not affect the ABI of any libraries
327 that are part of the GNU C Library, but may affect the ABI of other
328 libraries that use this type in their interfaces.
330 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
331 float_t and double_t types are now defined to long double instead of float
332 and double. These options are not the default, and this does not affect
333 the ABI of any libraries that are part of the GNU C Library, but it may
334 affect the ABI of other libraries that use this type in their interfaces,
335 if they are compiled or used with those options.
337 * The getentropy and getrandom functions, and the <sys/random.h> header file
340 * The buffer size for byte-oriented stdio streams is now limited to 8192
341 bytes by default. Previously, on Linux, the default buffer size on most
342 file systems was 4096 bytes (and thus remains unchanged), except on
343 network file systems, where the buffer size was unpredictable and could be
344 as large as several megabytes.
346 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
347 for the Linux quota interface which predates kernel version 2.4.22 has
350 * The malloc_get_state and malloc_set_state functions have been removed.
351 Already-existing binaries that dynamically link to these functions will
352 get a hidden implementation in which malloc_get_state is a stub. As far
353 as we know, these functions are used only by GNU Emacs and this change
354 will not adversely affect already-built Emacs executables. Any undumped
355 Emacs executables, which normally exist only during an Emacs build, should
356 be rebuilt by re-running “./configure; make” in the Emacs build tree.
358 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
359 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
360 “no-ip6-dotint” had already been the default, and support for the
361 “ip6-dotint” option was removed from the Internet in 2006.
363 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
364 flag from <resolv.h> have been removed. The option relied on a
365 backwards-incompatible DNS extension which was never deployed on the
368 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
369 RES_BLAST defined in the <resolv.h> header file have been deprecated.
370 They were already unimplemented.
372 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
373 _res.flags are deprecated. The flag was standardized in RFC 2133, but
374 removed again from the IETF name lookup interface specification in RFC
375 2553. Applications should use getaddrinfo instead.
377 * DNSSEC-related declarations and definitions have been removed from the
378 <arpa/nameser.h> header file, and libresolv will no longer attempt to
379 decode the data part of DNSSEC record types. Previous versions of glibc
380 only implemented minimal support for the previous version of DNSSEC, which
381 is incompatible with the currently deployed version.
383 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
384 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
385 <arpa/nameser.h> header file because the distinction between RR types and
386 meta-RR types is not officially standardized, subject to revision, and
387 thus not suitable for encoding in a macro.
389 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
390 and rhook members of the res_state type in <resolv.h> have been removed.
391 The glibc stub resolver did not support these hooks, but the header file
392 did not reflect that.
394 * For multi-arch support it is recommended to use a GCC which has
395 been built with support for GNU indirect functions. This ensures
396 that correct debugging information is generated for functions
397 selected by IFUNC resolvers. This support can either be enabled by
398 configuring GCC with '--enable-gnu-indirect-function', or by
399 enabling it by default by setting 'default_gnu_indirect_function'
400 variable for a particular architecture in the GCC source file
403 * GDB pretty printers have been added for mutex and condition variable
404 structures in POSIX Threads. When installed and loaded in gdb these pretty
405 printers show various pthread variables in human-readable form when read
406 using the 'print' or 'display' commands in gdb.
408 * Tunables feature added to allow tweaking of the runtime for an application
409 program. This feature can be enabled with the '--enable-tunables' configure
410 flag. The GNU C Library manual has details on usage and README.tunables has
411 instructions on adding new tunables to the library.
413 * A new version of condition variables functions have been implemented in
414 the NPTL implementation of POSIX Threads to provide stronger ordering
417 * A new version of pthread_rwlock functions have been implemented to use a more
418 scalable algorithm primarily through not using a critical section anymore to
421 Security related changes:
423 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
424 have been created with makecontext could fail to terminate due to a
425 missing .cantunwind annotation. This has been observed to lead to a hang
426 (denial of service) in some Go applications compiled with gccgo. Reported
427 by Andreas Schwab. (CVE-2016-6323)
429 * The DNS stub resolver functions would crash due to a NULL pointer
430 dereference when processing a query with a valid DNS question type which
431 was used internally in the implementation. The stub resolver now uses a
432 question type which is outside the range of valid question type values.
435 The following bugs are resolved with this release:
437 [4099] stdio: Overly agressive caching by stream i/o functions.
438 [7065] build: Support building glibc with -fstack-protector or -fstack-
440 [9842] localedata: en_CA: incorrect date format
441 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
442 before it started waiting
443 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
444 [15765] nptl: sem_open is wrongly a cancellation point
445 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
446 [16458] libc: endian.h and netinet/in.h byte order macros return values of
448 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
449 library linked with pthread
450 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
452 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
453 [17252] libc: getrandom and getentropy syscall
454 [17730] malloc: thread-local storage is sometimes improperly free()'d
455 after being __libc_memalign()'d
456 [18241] stdio: failed fseek on memstream does not set errno and can fail
458 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
460 [18463] nptl: pthread_cond_broadcast issue when surrounded by
461 PTHREAD_PRIO_INHERIT mutex on ARM
462 [18784] network: res_query and related function crash for special record
463 type queries (CVE-2015-5180)
464 [19380] math: strtod does not raise "inexact"
465 [19387] string: Integer overflow in memchr
466 [19390] string: Integer overflow in strncat
467 [19398] build: linknamespace tests fail with massively parallel build
468 [19402] nptl: Deadlock with robust shared mutex and asynchronous
470 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
471 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
472 [19514] libc: [PATCH] Fix spelling errors in spelling
473 "implement"/"implementation" in several places
474 [19582] network: Deprecate RES_USE_INET6
475 [19673] manual: clog10 docs appear to be erroneous
476 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
477 causes a segmentation fault
478 [19826] libc: invalid pointer returned from __tls_get_addr with static
480 [20016] network: resolv: Remove hooks support from the API
481 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
483 [20033] math: [x86_64] vectorized math function don't call the __finite
485 [20116] nptl: use after free in pthread_create
486 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
487 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
489 [20311] nptl: please install proc_service.h
490 [20366] libc: Compilation errors in installed headers in strict-compliance
492 [20370] malloc: malloc: Arena free list management is still racy
493 (incorrect fix in bug 19243)
494 [20386] libc: assert (X = 0) does not result in GCC warning
495 [20432] malloc: malloc: Minimize interface required for interposition
496 [20435] libc: Missing unwind info in __startcontext causes infinite loop
497 in _Unwind_Backtrace (CVE-2016-6323)
498 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
499 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
501 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
502 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
503 [20477] network: resolv: incorrect double-checked locking related to
505 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
507 [20495] math: x86_64 performance degradation due to AVX/SSE transition
509 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
510 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
511 cause transition penalty
512 [20517] math: sparcv9 missing fdiml compat symbol
513 [20524] manual: strverscmp is inconsistent
514 [20525] libc: <sys/quota.h> should be based on kernel headers
515 [20539] math: GCC 7 -static -lm fails to link at -O3
516 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
518 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
520 [20591] network: Remove obsolete DNSSEC support
521 [20592] network: DNS resource record type classification macros in
522 <arpa/nameser.h> are incorrect
523 [20593] network: Update DNS RR type definitions
524 [20611] network: getaddrinfo accepts invalid numeric scope IDs
525 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
527 [20629] network: libresolv: Remove support for bitstring labels
529 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
530 assertion: "maxidx >= 2"
531 [20660] math: [arm] Use VSQRT
532 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
533 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
534 [20689] libc: Test for FMA should also check for AVX.
535 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
536 [20715] math: iszero macro breaks existing code
537 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
538 [20728] libc: powerpc: Missing TOC stub in clone
539 [20729] build: glibc-2.24 fails to build for i486 with -Os
540 [20750] build: Build fails with default PIE enabled gcc-6.x
541 [20768] math: [alpha] sqrt fegetenv namespace
542 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
544 [20787] math: float_t is defined as float incorrectly on x86_64 even if
545 __FLT_EVAL_METHOD__ is 2
546 [20790] network: rpcgen buffer overrun in get_prog_declaration
547 [20822] nptl: race condition in __lll_unlock_elision on powerpc
548 [20829] libc: crypt snprintf namespace
549 [20847] libc: tst-vfork3 failure
550 [20855] math: Default bits/mathdef.h has inappropriate float_t
551 [20859] math: [sh4] FP_ILOGB0 invalid
552 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
553 U+20AC), not same as GBK
554 [20915] dynamic-link: global-dynamic TLS broken on aarch64
555 [20916] math: pow handling of sNaN arguments
556 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
557 [20919] math: Bad pow (qNaN, 0) result with -lieee
558 [20940] math: hypot sNaN handling
559 [20947] math: fmax, fmin sNaN handling
560 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
561 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
563 [20971] string: powerpc64/power7 memchr overflows internal pointer check
564 [20973] nptl: robust mutexes: Lost wake-ups
565 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
566 [20978] nis: strlen on null pointer in nss_nisplus
567 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
569 [21014] string: i686 memchr overflows internal pointer check
570 [21019] libc: [mips] n32 lseek incorrect on overflow
571 [21022] libc: [microblaze] __backtrace get_frame_size namespace
572 [21026] libc: [MIPS] readahead syscall is broken on n64
573 [21028] math: Fallback fesetexceptflag should always succeed
574 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
575 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
577 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
578 [21061] librt: [microblaze] librt lost clock_* exports
579 [21073] libc: tunables: insecure environment variables passed to
580 subprocesses with AT_SECURE
581 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
585 * The minimum Linux kernel version that this version of the GNU C Library
586 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
587 kernel version 2.6.32 or later suffices (on architectures that already
588 required kernel versions more recent than 3.2, those requirements remain
589 unchanged). Linux 3.2 or later kernel headers are required on all
592 * The pap_AN locale has been deleted. This has been deprecated for a long
593 time. It has been replaced by pap_AW & pap_CW, both of which have long
594 been included in previous releases.
596 * The readdir_r and readdir64_r functions have been deprecated. It is
597 recommended to use readdir and readdir64 instead.
599 * The type “union wait” has been removed. It was deprecated in the early
600 1990s and never part of POSIX. Application code should use the int type
601 instead of “union wait”.
603 * A new NSS action is added to facilitate large distributed system
604 administration. The action, MERGE, allows remote user stores like LDAP
605 to be merged into local user stores like /etc/groups in order to provide
606 easy to use, updated, and managed sets of merged credentials. The new
607 action can be used by configuring it in /etc/nsswitch.conf:
608 group: files [SUCCESS=merge] nis
609 Implemented by Stephen Gallagher (Red Hat).
611 * The deprecated __malloc_initialize_hook variable has been removed from the
614 * The long unused localedef --old-style option has been removed. It hasn't
615 done anything in over 16 years. Scripts using this option can safely
618 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
619 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
620 return the next representable value in the direction of positive infinity
621 and the nextdown functions return the next representable value in the
622 direction of negative infinity. These are currently enabled as GNU
625 Security related changes:
627 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
628 could result in a stack overflow when getnetbyname was called with an
629 overly long name. (CVE-2016-3075)
631 * Previously, getaddrinfo copied large amounts of address data to the stack,
632 even after the fix for CVE-2013-4458 has been applied, potentially
633 resulting in a stack overflow. getaddrinfo now uses a heap allocation
634 instead. Reported by Michael Petlan. (CVE-2016-3706)
636 * The glob function suffered from a stack-based buffer overflow when it was
637 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
638 Reported by Alexander Cherepanov. (CVE-2016-1234)
640 * The Sun RPC UDP client could exhaust all available stack space when
641 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
642 alloca plugin for GCC. (CVE-2016-4429)
644 * The IPv6 name server management code in libresolv could result in a memory
645 leak for each thread which is created, performs a failing naming lookup,
646 and exits. Over time, this could result in a denial of service due to
647 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
649 The following bugs are resolved with this release:
651 [1170] localedata: ne_NP: update Nepali locale definition file
652 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
654 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
655 [6796] math: fdim() does not set errno on overflow
656 [10354] libc: posix_spawn should use vfork() in more cases than presently
657 [11213] localedata: localedata: add copyright disclaimer to locale files
658 [12143] localedata: chr_US: new Cherokee locale
659 [12450] localedata: sgs_LT: new locale
660 [12676] localedata: ln_CD: new locale
661 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
663 [13304] math: fma, fmaf, fmal produce wrong results
664 [14259] build: --localedir arg to configure is ignored
665 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
666 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
667 [14934] localedata: es_CL: wrong first weekday chilean locale
668 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
670 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
672 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
673 [15368] nptl: raise() is not async-signal-safe
674 [15479] math: ceil, floor, round and trunc raise inexact exception
675 [15578] localedata: kk_KZ: various updates
676 [16003] localedata: pap_AN: punt old locale
677 [16137] localedata: iw_IL: punt old locale
678 [16190] localedata: eo: new esperanto locale
679 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
680 [16742] malloc: race condition: pthread_atfork() called before first
681 malloc() results in unexpected locking behaviour/deadlocks
682 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
684 [16983] localedata: postal_fmt does not allow %l and %n modifiers
685 [17565] localedata: pt_PT: wrong (work-)week start
686 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
687 [17950] build: Build fails with -msse
688 [18205] localedata: be_BY*: wrong first_weekday and first_workday
689 [18433] libc: posix_spawn does not return correctly upon failure to
691 [18453] localedata: charmaps/IBM875: incorrect codes
692 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
694 [18896] localedata: he_IL: improvements for currency
695 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
697 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
699 [19056] libc: Deprecate readdir_r
700 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
702 [19198] localedata: nl_NL: small improvements for Dutch locales
703 [19257] network: Per-thread memory leak in __res_vinit with IPv6
704 nameservers (CVE-2016-5417)
705 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
707 [19400] locale: Language missing in "iso-639.def", trivial fix in
709 [19431] malloc: Deadlock between fflush, getdelim, and fork
710 [19505] libc: Incorrect file descriptor validity checks in
711 posix_spawn_file_actions_add{open,close,dup2}
712 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
714 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
715 `intl/{gettextP,loadinfo}.h'
716 [19534] libc: execle, execlp may use malloc
717 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
718 [19573] network: res_nclose and __res_maybe_init disagree about name
719 server initialization, breaking Hesiod
720 [19575] localedata: Status of GB18030 tables
721 [19581] localedata: sr_* date_fmt string contains additional newline
722 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
724 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
725 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
726 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
727 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
729 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
731 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
733 [19610] dynamic-link: ldconfig -X removes stale symbolic links
734 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
735 [19633] locale: strfmon_l applies global locale to number formatting
736 [19642] network: Memory leak in getnameinfo
737 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
738 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
740 [19654] math: [x86_64] Need testcase for BZ #19590 fix
741 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
743 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
744 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
746 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
748 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
750 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
751 pointers and lengths in error-case.
752 [19727] locale: Converting from/to UTF-xx with iconv() does not always
753 report errors on UTF-16 surrogates values.
754 [19755] nscd: nscd assertion failure in gc
755 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
756 [19759] libc: mempcpy shouldn't be inlined
757 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
758 [19765] libc: s390 needs an optimized mempcpy
759 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
760 NAME_MAX limit assumption (CVE-2016-1234)
761 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
762 [19787] network: Missing and incorrect truncation checks in getnameinfo
763 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
765 [19791] network: Assertion failure in res_query.c with un-connectable name
767 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
768 [19822] math: libm.so install clobbers old version
769 [19825] network: resolv: send_vc can return uninitialized data in second
770 response to getaddrinfo
771 [19830] network: nss_dns: should check RDATA length against buffer length
772 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
773 confronted with A/AAAA records of invalid size
774 [19837] nss: nss_db: No retries for some long lines with a larger buffer
775 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
776 [19853] stdio: Printing IBM long double in decimal with high precision is
778 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
779 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
780 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
782 [19865] network: Assertion failure or memory leak in
783 _nss_dns_getcanonname_r
784 [19868] network: nss_dns: netent code does not skip over non-PTR records
785 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
787 [19881] string: Improve x86-64 memset
788 [19907] string: Incorrect memcpy tests
789 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
791 [19925] libc: termios.h XCASE namespace
792 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
793 [19929] libc: limits.h NL_NMAX namespace
794 [19931] stdio: Memory leak in vfprintf
795 [19957] libc: clone(CLONE_VM) access invalid parent memory
796 [19963] localedata: en_IL: New locale
797 [19989] stdio: stdio.h cuserid namespace
798 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
800 [19996] locale: langinfo.h nl_langinfo_l namespace
801 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
802 [20010] network: getaddrinfo: Stack overflow in hostent translation
804 [20012] stdio: libio: fmemopen append mode failure
805 [20014] stdio: stdio.h namespace for pre-threads POSIX
806 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
807 [20023] libc: fcntl.h timespec namespace
808 [20024] math: [x86_64] vectorized sincos trashes the stack
809 [20031] network: nss_hesiod: Heap overflow in get_txt_records
810 [20041] time: sys/time.h timespec namespace
811 [20043] libc: unistd.h missing cuserid for UNIX98 and before
812 [20044] libc: unistd.h missing pthread_atfork for UNIX98
813 [20051] libc: ttyslot in wrong header under wrong conditions
814 [20054] libc: gethostname not declared for XPG4
815 [20055] libc: termios.h missing tcgetsid for XPG4
816 [20072] dynamic-link: x86 init_cpu_features is called twice in static
818 [20073] libc: sys/stat.h fchmod namespace
819 [20074] libc: stdlib.h rand_r namespace
820 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
821 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
823 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
824 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
826 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
827 [20119] libc: Wrong mask for processors level type from CPUID
828 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
829 AS not supporting AVX512
830 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
832 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
833 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
835 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
836 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
837 [20178] libc: posix_spawn{p} should not call exit
838 [20191] stdio: libio: vtables hardening
839 [20195] string: FMA4 detection requires CPUID execution with register
841 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
842 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
844 [20212] math: acos (sNaN) returns sNaN
845 [20213] math: asin (sNaN) returns sNaN
846 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
847 [20218] math: [i386] asinhl (sNaN) returns sNaN
848 [20219] math: [i386] atanhl (sNaN) returns sNaN
849 [20222] stdio: fopencookie: Mangle function pointers
850 [20224] math: [i386] cbrtl (sNaN) returns sNaN
851 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
852 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
854 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
855 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
856 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
857 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
858 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
859 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
860 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
861 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
862 [20240] math: modf (sNaN) returns sNaN
863 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
864 [20250] math: frexp (sNaN) returns sNaN
865 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
866 [20255] math: [i386] fdim, fdimf return with excess range and precision /
868 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
869 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
870 subscript is below array bounds [-Werror=array-bounds]
871 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
872 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
874 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
875 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
877 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
879 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
880 [20316] localedata: id_ID: Februari instead of Pebruari
881 [20327] string: POWER8 strcasecmp returns incorrect result
882 [20347] math: Failure: Test: j0_downward (0xap+0)
883 [20348] libc: FAIL: misc/tst-preadvwritev64
884 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
885 [20350] libc: There is no test for p{read,write}64
886 [20357] math: Incorrect cos result for 1.5174239687223976
887 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
891 * Unicode 8.0.0 Support: Character encoding, character type info, and
892 transliteration tables are all updated to Unicode 8.0.0, using new
893 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
894 These updates cause user visible changes, such as the fixes for bugs
895 89, 16061, and 18568.
897 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
898 kernel-internal CPU set size. This means that requests that change the
899 CPU affinity which failed before (for example, an all-ones CPU mask) will
900 now succeed. Applications that need to determine the effective CPU
901 affinities need to call sched_getaffinity or pthread_getaffinity_np after
902 setting it because the kernel can adjust it (and the previous size check
903 would not detect this in the majority of cases).
905 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
906 the following new symbols are used: fts64_children, fts64_close,
907 fts64_open, fts64_read and fts64_set.
909 * getaddrinfo now detects certain invalid responses on an internal netlink
910 socket. If such responses are received, an affected process will
911 terminate with an error message of "Unexpected error <number> on netlink
912 descriptor <number>" or "Unexpected netlink response of size <number> on
913 descriptor <number>". The most likely cause for these errors is a
914 multi-threaded application which erroneously closes and reuses the netlink
915 file descriptor while it is used by getaddrinfo.
917 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
918 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
919 unnecessary serialization of memory allocation requests across threads.
920 The defect is now corrected. Users should see a substantial increase in
921 the concurent throughput of allocation requests for applications which
922 trigger this bug. Affected applications typically create and
923 destroy threads frequently. (Bug 19048 was reported and analyzed by
926 * There is now a --disable-timezone-tools configure option for disabling the
927 building and installing of the timezone related utilities (zic, zdump, and
928 tzselect). This is useful for people who build the timezone data and code
929 independent of the GNU C Library.
931 * The obsolete header <regexp.h> has been removed. Programs that require
932 this header must be updated to use <regex.h> instead.
934 * The obsolete functions bdflush, create_module, get_kernel_syms,
935 query_module and uselib are no longer available to newly linked binaries;
936 the header <sys/kdaemon.h> has been removed. These functions and header
937 were specific to systems using the Linux kernel and could not usefully be
938 used with the GNU C Library on systems with version 2.6 or later of the
941 * Optimized string, wcsmbs and memory functions for IBM z13.
942 Implemented by Stefan Liebler.
944 * Newly linked programs that define a variable called signgam will no longer
945 have it set by the lgamma, lgammaf and lgammal functions. Programs that
946 require signgam to be set by those functions must ensure that they use the
947 variable provided by the GNU C Library and declared in <math.h>, without
948 defining their own copy.
950 * The minimum GCC version that can be used to build this version of the GNU
951 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
952 still be used to compile programs using the GNU C Library.
954 Security related changes:
956 * An out-of-bounds value in a broken-out struct tm argument to strftime no
957 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
959 * The LD_POINTER_GUARD environment variable can no longer be used to disable
960 the pointer guard feature. It is always enabled. Previously,
961 LD_POINTER_GUARD could be used to disable security hardening in binaries
962 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
965 * An integer overflow in hcreate and hcreate_r could lead to an
966 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
968 * The catopen function no longer has unbounded stack usage. Reported by
971 * The nan, nanf and nanl functions no longer have unbounded stack usage
972 depending on the length of the string passed as an argument to the
973 functions. Reported by Joseph Myers. (CVE-2014-9761)
975 * A stack-based buffer overflow was found in libresolv when invoked from
976 libnss_dns, allowing specially crafted DNS responses to seize control
977 of execution flow in the DNS client. The buffer overflow occurs in
978 the functions send_dg (send datagram) and send_vc (send TCP) for the
979 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
980 family. The use of AF_UNSPEC triggers the low-level resolver code to
981 send out two parallel queries for A and AAAA. A mismanagement of the
982 buffers used for those queries could result in the response of a query
983 writing beyond the alloca allocated buffer created by
984 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
985 the overflow. Thanks to the Google Security Team and Red Hat for
986 reporting the security impact of this issue, and Robert Holiday of
987 Ciena for reporting the related bug 18665. (CVE-2015-7547)
989 The following bugs are resolved with this release:
991 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
992 [887] math: Math library function "logb" and "nextafter" inconsistent
993 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
994 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
995 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
996 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
998 [4404] localedata: German translation of "Alarm clock" is misleading
999 [6799] math: nextafter() and nexttoward() doen't set errno on
1000 overflow/underflow errors
1001 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
1003 [10432] nis: _nss_nis_setnetgrent assertion failure
1004 [11460] libc: fts has no LFS support
1005 [12926] network: getaddrinfo()/make_request() may spin forever
1006 [13065] nptl: Race condition in pthread barriers
1007 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
1008 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
1010 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
1011 [14912] libc: Rename non-installed bits/*.h headers
1012 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
1013 [15367] math: Let gcc use __builtin_isinf
1014 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
1015 [15421] math: lgamma wrongly sets signgam for ISO C
1016 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
1017 FE_INVALID with argument out of range
1018 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
1020 [15786] dynamic-link: ifunc resolver functions can smash function
1022 [15918] math: Unnecessary check for equality in hypotf()
1023 [16061] localedata: Review / update transliteration data
1024 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
1026 [16141] time: strptime %z offset restriction
1027 [16171] math: drem should be alias of remainder
1028 [16296] math: fegetround is pure?
1029 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
1030 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
1032 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
1033 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
1035 [16422] math: [powerpc] math-float, math-double failing llrint tests with
1036 "Exception "Inexact" set" on ppc32
1037 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
1038 [16517] math: Missing underflow exception from tanf/tan/tanl
1039 [16519] math: Missing underflow exception from sinhf
1040 [16520] math: Missing underflow exception from tanhf
1041 [16521] math: Missing underflow exception from exp2
1042 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
1044 [16734] stdio: fopen calls mmap to allocate its buffer
1045 [16961] math: nan function incorrect handling of bad sequences
1046 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
1047 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
1048 [16985] locale: localedef: confusing error message when opening output
1050 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
1051 [17197] locale: Redundant shift character in iconv conversion output at
1053 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
1054 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
1055 [17250] dynamic-link: static linking breaks nss loading
1056 (getaddrinfo/getpwnam/etc...)
1057 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
1059 [17441] math: isnan() should use __builtin_isnan() in GCC
1060 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
1061 (related to lock elision)
1062 [17787] manual: Exponent on page 324 of the PDF ends prematurely
1063 [17886] time: strptime should be able to parse "Z" as a timezone with %z
1064 [17887] time: strptime should be able to parse "+01:00" style timezones
1065 [17905] libc: catopen() Multiple unbounded stack allocations
1067 [18084] libc: backtrace (..., 0) dumps core on x86
1068 [18086] libc: nice() sets errno to 0 on success
1069 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
1070 is too large (CVE-2015-8778)
1071 [18251] dynamic-link: SONAME missing when audit modules provides path
1072 [18265] libc: add attributes for wchar string and memory functions
1073 [18370] math: csqrt missing underflows
1074 [18421] libc: [hppa] read-only segment has dynamic relocations
1075 [18472] libc: Obsolete syscall wrappers should be compat symbols
1076 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
1077 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
1078 [18525] localedata: Remove locale timezone information
1079 [18560] libc: [powerpc] spurious bits/ipc.h definitions
1080 [18568] localedata: Update locale data to Unicode 8.0
1081 [18589] locale: sort-test.sh fails at random
1082 [18595] math: ctan, ctanh missing underflows
1083 [18604] libc: assert macro-expands its argument
1084 [18610] math: S390: fetestexcept() reports any exception if DXC-code
1085 contains a vector instruction exception.
1086 [18611] math: j1, jn missing errno setting on underflow
1087 [18618] localedata: sync Chechen locale definitions with other *_RU
1089 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
1090 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
1091 [18665] network: In send_dg, the recvfrom function is NOT always using the
1092 buffer size of a newly created buffer (CVE-2015-7547)
1093 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
1095 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
1097 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
1098 [18699] math: tilegx cproj() for various complex infinities does not yield
1100 [18724] libc: Harden put*ent functions against data injection
1101 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
1102 [18755] build: build errors with -DNDEBUG
1103 [18757] stdio: fmemopen fails to set errno on failure
1104 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
1106 [18781] libc: openat64 lacks O_LARGEFILE
1107 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
1108 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
1109 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
1110 [18790] math: [ldbl-128ibm] tanhl inaccurate
1111 [18795] libc: stpncpy fortification misses buffer lengths that are
1112 statically too large
1113 [18796] build: build fails for --disable-mathvec
1114 [18803] math: hypot missing underflows
1115 [18820] stdio: fmemopen may leak memory on failure
1116 [18823] math: csqrt spurious underflows
1117 [18824] math: fma spurious underflows
1118 [18825] math: pow missing underflows
1119 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
1120 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
1121 [18870] build: sem_open.c fails to compile with missing symbol
1123 [18872] stdio: Fix memory leak in printf_positional
1124 [18873] libc: posix_fallocate overflow check ineffective
1125 [18875] math: Excess precision leads incorrect libm
1126 [18877] libc: arm: mmap offset regression
1127 [18887] libc: memory corruption when using getmntent on blank lines
1128 [18918] localedata: hu_HU: change time to HH:MM:SS format
1129 [18921] libc: Regression: extraneous stat() and fstat() performed by
1131 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
1132 binaries (CVE-2015-8777)
1133 [18951] math: tgamma missing underflows
1134 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
1136 [18953] localedata: lt_LT: change currency symbol to the euro
1137 [18956] math: powf inaccuracy
1138 [18961] math: [i386] exp missing underflows
1139 [18966] math: [i386] exp10 missing underflows
1140 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
1141 [18969] build: multiple string test failures due to missing locale
1143 [18970] libc: Reference of pthread_setcancelstate in libc.a
1144 [18977] math: float / long double Bessel functions not in XSI POSIX
1145 [18980] math: i386 libm functions return with excess range and precision
1146 [18981] math: i386 scalb*, ldexp return with excess range and precision
1147 [18982] stdio: va_list and vprintf
1148 [18985] time: Passing out of range data to strftime() causes a segfault
1150 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
1151 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
1152 [19012] locale: iconv_open leaks memory on error path
1153 [19016] math: clog, clog10 inaccuracy
1154 [19018] nptl: Mangle function pointers in tls_dtor_list
1155 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
1156 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
1157 [19048] malloc: malloc: arena free list can become cyclic, increasing
1159 [19049] math: [powerpc] erfc incorrect zero sign
1160 [19050] math: [powerpc] log* incorrect zero sign
1161 [19058] math: [x86_64] Link fail with -fopenmp and -flto
1162 [19059] math: nexttoward overflow incorrect in non-default rounding modes
1163 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
1164 [19074] network: Data race in _res_hconf_reorder_addrs
1165 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
1166 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
1167 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
1169 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
1171 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
1172 [19086] manual: posix_fallocate64 documented argument order is wrong.
1173 [19088] math: lround, llround missing exceptions close to overflow
1175 [19094] math: lrint, llrint missing exceptions close to overflow threshold
1176 [19095] math: dbl-64 lrint incorrect for 64-bit long
1177 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
1178 [19124] dynamic-link: ld.so failed to build with older assmebler
1179 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
1180 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
1181 [19134] math: [powerpc32] lround, lroundf spurious exceptions
1182 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
1183 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
1184 pthread_setaffinity_np
1185 [19156] math: [ldbl-128] j0l spurious underflows
1186 [19164] nptl: tst-getcpu fails with many possible CPUs
1187 [19168] math: math/test-ildoubl and math/test-ldouble failure
1188 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
1189 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
1191 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
1192 (FE_NOMASK_ENV) do not clear SSE exceptions
1193 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
1194 _int_new_arena/reused_arena
1195 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
1196 [19201] math: dbl-64 remainder incorrect sign of zero result
1197 [19205] math: bits/math-finite.h conditions do not match math.h and
1199 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
1200 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
1201 for C99-based standards
1202 [19212] libc: features.h not -Wundef clean
1203 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
1205 [19214] libc: Family and model identification for AMD CPU's are incorrect.
1206 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
1207 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
1209 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
1210 "inexact" exceptions
1211 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
1213 [19242] libc: strtol incorrect in Turkish locales
1214 [19243] malloc: reused_arena can pick an arena on the free list, leading
1215 to an assertion failure and reference count corruption
1216 [19253] time: tzset() ineffective when temporary TZ did not include DST
1218 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
1219 [19270] math: [hppa] Shared libm missing __isnanl
1220 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
1221 MAP_HUGETLB and MAP_STACK defines
1222 [19313] nptl: Wrong __cpu_mask for x32
1223 [19347] libc: grantpt: try to force a specific gid even without pt_chown
1224 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
1225 [19350] math: [ldbl-128ibm] sinhl spurious overflows
1226 [19351] math: [ldbl-128ibm] logl inaccurate near 1
1227 [19363] time: x32: times() return value wrongly truncates/sign extends
1229 [19367] dynamic-link: Improve branch prediction on Silvermont
1230 [19369] network: Default domain name not reset by res_ninit when "search"
1231 / "domain" entry is removed from resolv.conf
1232 [19375] math: powerpc: incorrect results for POWER7 logb with negative
1234 [19385] localedata: bg_BG: time separator should be colon, not comma
1235 [19408] libc: linux personality syscall wrapper may erroneously return an
1236 error on 32-bit architectures
1237 [19415] libc: dladdr returns wrong names on hppa
1238 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
1239 IBM905, IBM907, and IBM909
1240 [19439] math: Unix98 isinf and isnan functions conflict with C++11
1241 [19443] build: build failures with -DDEBUG
1242 [19451] build: Make check fails on test-double-vlen2
1243 [19462] libc: Glibc failed to build with -Os
1244 [19465] math: Wrong code with -Os
1245 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
1247 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
1249 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
1250 [19486] math: S390: Math tests fail with "Exception Inexact set".
1251 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
1252 [19550] libc: [mips] mmap negative offset handling inconsistent with other
1254 [19590] math: Fail to build shared objects that use libmvec.so functions.
1258 * The following bugs are resolved with this release:
1260 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
1261 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
1262 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
1263 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
1264 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
1265 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
1266 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
1267 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
1268 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
1269 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
1270 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
1271 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
1272 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
1273 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
1274 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
1275 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
1276 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
1277 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
1278 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
1279 18657, 18676, 18694, 18696, 18887.
1281 * Cache information can be queried via sysconf() function on s390 e.g. with
1282 _SC_LEVEL1_ICACHE_SIZE as argument.
1284 * A buffer overflow in gethostbyname_r and related functions performing DNS
1285 requests has been fixed. If the NSS functions were called with a
1286 misaligned buffer, the buffer length change due to pointer alignment was
1287 not taken into account. This could result in application crashes or,
1288 potentially arbitrary code execution, using crafted, but syntactically
1289 valid DNS responses. (CVE-2015-1781)
1291 * The time zone file parser has been made more robust against crafted time
1292 zone files, avoiding heap buffer overflows related to the processing of
1293 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
1294 large time zone data files. Overly long time zone specifiers in the TZ
1295 variable no longer result in stack overflows and crashes.
1297 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
1298 for LD and GD on x86 and x86-64, has been implemented. You will need
1299 binutils-2.24 or later to enable this optimization.
1301 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
1302 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
1303 Hat). These updates cause user visible changes, such as the fix for bug
1306 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
1307 and getXXbyYY NSS calls for the same database, causing a denial-of-service
1308 condition in some applications.
1310 * Added vector math library named libmvec with the following vectorized x86_64
1311 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
1313 The library can be disabled with --disable-mathvec. Use of the functions is
1314 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
1315 Shared library libmvec.so is linked in as needed when using -lm (no need to
1316 specify -lmvec explicitly for not static builds).
1317 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
1319 * A new fmemopen implementation has been added with the goal of POSIX
1320 compliance. The new implementation fixes the following long-standing
1321 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
1322 old implementation is still present for use be by existing binaries.
1324 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
1325 releases. It has been fixed to match 2.19 and older, but binaries built
1326 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
1328 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
1329 Contributed by Roland McGrath (Google).
1331 * The header <regexp.h> is deprecated, and will be removed in a future
1332 release. Use of this header will trigger a deprecation warning.
1333 Application developers should update their code to use <regex.h> instead.
1335 This header was formerly part of SUS, but was deprecated in 1994 and
1336 removed from the standard in 2001. Also, the glibc implementation
1337 leaks memory. See BZ#18681 for more details.
1341 * The following bugs are resolved with this release:
1343 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
1344 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
1345 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
1346 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
1347 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
1348 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
1349 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
1350 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
1351 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
1352 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
1355 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
1356 too little memory for the to-be-scanned arguments and overflow the
1357 allocated buffer. The implementation now correctly computes the required
1358 buffer size when using malloc, and switches to malloc from alloca as
1361 * A new semaphore algorithm has been implemented in generic C code for all
1362 machines. Previous custom assembly implementations of semaphore were
1363 difficult to reason about or ensure that they were safe. The new version
1364 of semaphore supports machines with 64-bit or 32-bit atomic operations.
1365 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
1366 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
1368 * Port to Altera Nios II has been contributed by Mentor Graphics.
1370 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
1371 implementations for powerpc64/powerpc64le.
1372 Implemented by Adhemerval Zanella (IBM).
1374 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
1375 and powerpc64le. This may improve lock scaling of existing programs on
1376 HTM capable systems. The lock elision code is only enabled with
1377 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1378 powerpc will issue a transaction abort on every syscall to avoid side
1379 effects being visible outside transactions.
1381 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1382 AArch64. Contributed by ARM Ltd.
1384 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1386 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1387 under certain input conditions resulting in the execution of a shell for
1388 command substitution when the application did not request it. The
1389 implementation now checks WRDE_NOCMD immediately before executing the
1390 shell and returns the error WRDE_CMDSUB as expected.
1392 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1393 processing format strings with a large number of format specifiers.
1395 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1396 infinite loop if the DNS response contained a PTR record of an unexpected
1399 * The minimum GCC version that can be used to build this version of the GNU
1400 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1401 still be used to compile programs using the GNU C Library.
1403 * The GNU C Library is now built with -Werror by default. This can be
1404 disabled by configuring with --disable-werror.
1406 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1408 * The obsolete sigvec function has been removed. This was the original
1409 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1410 programs have been using instead for about 25 years. Of course, ABI
1411 compatibility for old binaries using sigvec remains intact.
1413 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1414 with newer versions of bison.
1416 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1417 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1418 registers overlay two consecutive single-precision registers. MIPS32R2
1419 introduced a new FPU mode (FR=1) where double-precision registers extend the
1420 corresponding single-precision registers which is incompatible with the
1421 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1422 require the use of FR=1 making a transition necessary. New o32 ABI
1423 extensions enable users to migrate over time from the original o32 ABI
1424 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1425 tracks the ABI of any loaded object and verifies that new objects are
1426 compatible. Mode transitions will also be requested as required and
1427 unsupportable objects will be rejected. The ABI checks include both soft and
1428 hard float ABIs for o32, n32 and n64.
1430 GCC 5 with GNU binutils 2.25 onwards:
1431 It is strongly recommended that all o32 system libraries are built using the
1432 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1433 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1434 compiler using --with-fp-32=xx to set this by default.
1438 * The following bugs are resolved with this release:
1440 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1441 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1442 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1443 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1444 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1445 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1446 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1447 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1448 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1449 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1450 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1451 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1452 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1453 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1454 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1456 * Reverted change of ABI data structures for s390 and s390x:
1457 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1458 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1459 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1460 are preserved pointing straight to the same implementation as the old ones.
1461 Given that, new callers will simply provide a too-big buffer to these
1462 functions. Any applications/libraries out there that embed jmp_buf or
1463 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1464 against 2.19 headers will have to rebuilt again. This is necessary in any
1465 case to revert the breakage in their ABI caused by the glibc change.
1467 * Support for file description locks is added to systems running the
1468 Linux kernel. The standard file locking interfaces are extended to
1469 operate on file descriptions, not file descriptors, via the use of
1470 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1471 are associated with an open file instead of a process.
1473 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1475 * The minimum Linux kernel version that this version of the GNU C Library
1476 can be used with is 2.6.32.
1478 * Running the testsuite no longer terminates as soon as a test fails.
1479 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1480 with PASS or FAIL lines for individual tests. A summary of the results is
1481 printed, including a list of failing lists, and "make check" exits with
1482 error status if there were any unexpected failures. "make check
1483 stop-on-test-failure=y" may be used to keep the old behavior.
1485 * The am33 port, which had not worked for several years, has been removed
1488 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1489 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1490 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1491 conflicted with POSIX (support for which was removed in 2.19), the
1492 interfaces those macros enabled remain available when compiling with
1493 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1494 test macros defined.
1496 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1498 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1499 This may improve lock scaling of existing programs on TX capable systems.
1500 The lock elision code is only built with --enable-lock-elision=yes and
1501 then requires a GCC version supporting the TX builtins. With lock elision
1502 default mutexes are elided via __builtin_tbegin, if the cpu supports
1503 transactions. By default lock elision is not enabled and the elision code
1506 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1507 copy the path argument. This allowed programs to cause posix_spawn to
1508 deference a dangling pointer, or use an unexpected pathname argument if
1509 the string was modified after the posix_spawn_file_actions_addopen
1512 * All supported architectures now use the main glibc sysdeps directory
1513 instead of some being in a separate "ports" directory (which was
1514 distributed separately before glibc 2.17).
1516 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1517 On configurations that support it (all Linux configurations), it's now
1518 used regardless of the --enable-add-ons switch to configure. It is no
1519 longer possible to build such configurations without pthreads support.
1521 * Locale names, including those obtained from environment variables (LANG
1522 and the LC_* variables), are more tightly checked for proper syntax.
1523 setlocale will now fail (with EINVAL) for locale names that are overly
1524 long, contain slashes without starting with a slash, or contain ".." path
1525 components. (CVE-2014-0475) Previously, some valid locale names were
1526 silently replaced with the "C" locale when running in AT_SECURE mode
1527 (e.g., in a SUID program). This is no longer necessary because of the
1530 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1531 with application code using Intel MPX instructions. (With all previous
1532 versions, the MPX register state could be clobbered when making calls
1533 into or out of a shared library.) Note that while the new dynamic
1534 linker is compatible with all known x86 hardware whether or not it
1535 supports Intel MPX, some x86 instruction-set emulators might fail to
1536 handle the new instruction encodings. This is known to affect Valgrind
1537 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1538 release), and might affect other tools that do instruction emulation.
1540 * Support for loadable gconv transliteration modules has been removed.
1541 The support for transliteration modules has been non-functional for
1542 over a decade, and the removal is prompted by security defects. The
1543 normal gconv conversion modules are still supported. Transliteration
1544 with //TRANSLIT is still possible, and the //IGNORE specifier
1545 continues to be supported. (CVE-2014-5119)
1547 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1548 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1549 resulting a denial-of-service security vulnerability in applications which
1550 use functions related to iconv. (CVE-2014-6040)
1554 * The following bugs are resolved with this release:
1556 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1557 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1558 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1559 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1560 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1561 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1562 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1563 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1564 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1565 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1566 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1567 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1568 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1569 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1570 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1571 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1572 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1573 16431, 16453, 16474, 16506, 16510, 16529
1575 * Slovenian translations for glibc messages have been contributed by the
1576 Translation Project's Slovenian team of translators.
1578 * The public headers no longer use __unused nor __block. This change is to
1579 support compiling programs that are derived from BSD sources and use
1580 __unused internally, and to support compiling with Clang's -fblock
1581 extension which uses __block.
1583 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1584 large collation sequences to optimize multiple passes. This cache
1585 computation may overflow for large collation sequences and may cause a
1586 stack or buffer overflow. This is now fixed to use a slower algorithm
1587 which does not use a cache if there is an integer overflow.
1589 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1590 rules for large collation sequences to optimize multiple passes and falls
1591 back to alloca if malloc fails, resulting in a possible stack overflow.
1592 The implementation now falls back to an uncached collation sequence lookup
1595 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1596 initialized for static applications resulting in the security feature
1597 being disabled. The pointer guard is now correctly initialized to a
1598 random value for static applications. Existing static applications need
1599 to be recompiled to take advantage of the fix (bug 15754).
1601 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1602 to the d_name member of struct dirent, or omit the terminating NUL
1603 character. (Bugzilla #14699).
1605 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1606 aligned_alloc functions could allocate too few bytes or corrupt the
1607 heap when passed very large allocation size values (Bugzilla #15855,
1610 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1611 for AF_INET6 has been fixed (Bugzilla #16072).
1613 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1614 pap_CW, quz_PE, the_NP.
1616 * Substantially revised locales: gd_GB, ht_HT
1618 * The LC_ADDRESS field was updated to support country_car for almost all
1621 * ISO 1427 definitions were updated.
1623 * ISO 3166 definitions were updated.
1625 * The localedef utility now supports --big-endian and --little-endian
1626 command-line options to generate locales for a different system from that
1627 for which the C library was built.
1629 * Binary locale files now only depend on the endianness of the system for
1630 which they are generated and not on other properties of that system. As a
1631 consequence, binary files generated with new localedef may be incompatible
1632 with old versions of the GNU C Library, and binary files generated with
1633 old localedef may be incompatible with this version of the GNU C Library,
1634 in the following circumstances:
1636 + Locale files may be incompatible on m68k systems.
1638 + Locale archive files (but not separate files for individual locales) may
1639 be incompatible on systems where plain "char" is signed.
1641 * The configure option --disable-versioning has been removed. Builds with
1642 --disable-versioning had not worked for several years.
1644 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1645 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1647 * SystemTap probes for malloc have been introduced.
1649 * SystemTap probes for slow multiple precision fallback paths of
1650 transcendental functions have been introduced.
1652 * Support for powerpc64le has been added.
1654 * The soft-float powerpc port now supports e500 processors.
1656 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1658 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1659 set of header declarations that are enabled by default, even when other
1660 feature test macros or compiler options such as -std=c99 would otherwise
1661 disable some of those declarations.
1663 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1664 conflict with POSIX. The libbsd-compat library (which was a dummy library
1665 that did nothing) has also been removed.
1667 * Preliminary documentation about Multi-Thread, Async-Signal and
1668 Async-Cancel Safety has been added.
1670 * Change of ABI data structures for s390 and s390x:
1671 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1672 allow for future hardware extensions. All library functions that accept or
1673 return these structures were versioned in order to provide backwards
1674 compatibility with existing code. However, not all cases can be handled
1675 with interface versioning. If an application embeds either structure into
1676 another structure and that structure is passed to another compilation unit
1677 which expects the newer larger-sized object then any access to the new
1678 fields will result in undefined behaviour. Similarly any access to fields
1679 that were moved by the enlarging of the structures will cause undefined
1680 behaviour. To fix the undefined behaviour all objects that are part of the
1681 final in-memory image must agree on the size of structures, and this may
1682 require recompilation.
1686 * The following bugs are resolved with this release:
1688 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1689 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1690 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1691 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1692 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1693 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1694 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1695 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1696 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1697 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1698 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1699 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1700 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1703 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1704 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1705 Distributions can re-enable building and using pt_chown via the new configure
1706 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1707 considerable security risks and should only be used if the distribution
1708 understands and accepts the risks.
1710 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1713 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1714 fixed (Bugzilla #15330).
1716 * Add support for calling C++11 thread_local object destructors on thread
1717 and program exit. This needs compiler support for offloading C++11
1718 destructor calls to glibc.
1720 * Improved worst case performance of libm functions with double inputs and
1723 * Support for priority inherited mutexes in pthread condition variables on
1724 non-x86 architectures.
1726 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1728 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1730 * Optimized string functions for ARM. Implemented by Will Newton and
1733 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1735 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1738 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1739 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1741 * Added a benchmark framework to track performance of functions in glibc.
1743 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1744 It is based on draft TS 18661 and currently enabled as a GNU extension.
1746 * On Linux, the clock function now uses the clock_gettime system call
1747 for improved precision, rather than old times system call.
1749 * Added support for version-3 tz format files. This is needed when using
1750 the tz database release 2013e or later, and affects a few unusual cases --
1751 currently only TZ='America/Godthab' for time stamps after 2037.
1753 * Added new API functions pthread_getattr_default_np and
1754 pthread_setattr_default_np to get and set the default pthread
1755 attributes of a process.
1757 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1758 This may improve lock scaling of existing programs on TSX capable systems.
1759 When the --enable-lock-elision=yes parameter is specified at configure
1760 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1763 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1764 availability). Implemented by Ryan S. Arnold.
1766 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1770 * The following bugs are resolved with this release:
1772 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1773 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1774 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1775 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1776 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1777 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1778 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1779 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1780 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1781 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1782 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1783 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1784 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1785 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1786 14879, 14889, 14893, 14898, 14914.
1788 * Optimization of memcpy for MIPS.
1790 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1791 EMFILE has been fixed (Bugzilla #14889).
1793 * The add-on ports collection is now distributed in the "ports" subdirectory
1794 of the main GNU C Library distribution, rather than separately.
1796 * Port to ARM AArch64 contributed by Linaro.
1798 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1799 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1801 Implemented by Andreas Krebbel.
1803 * The new function secure_getenv allows secure access to the environment,
1804 returning NULL if running in a SUID/SGID process. This function replaces
1805 the internal function __secure_getenv.
1807 * SystemTap static probes have been added into the dynamic linker.
1808 Implemented by Gary Benson.
1810 * Optimizations of string functions strstr, strcasestr and memmem.
1811 Implemented by Maxim Kuvyrkov.
1813 * The minimum Linux kernel version that this version of the GNU C Library
1814 can be used with is 2.6.16.
1816 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1817 powerpc POWER7. Implemented by Will Schmidt.
1819 * New configure option --disable-nscd builds the C library such that it
1820 never attempts to contact the Name Service Caching Daemon (nscd).
1821 New configure option --disable-build-nscd avoids building nscd itself;
1822 this is the default if --disable-nscd is used.
1824 * Improved support for cross-compilation, including cross-testing and
1825 bootstrap builds without a previously built glibc.
1827 * Several testsuite tests are now able to test multiple IFUNC variants of an
1828 interface, rather than just testing the one that would be chooen by
1831 * New configure options --with-bugurl and --with-pkgversion, for
1832 distributors to use to embed their bug-reporting and package version
1833 information in --help and --version output.
1835 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1836 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1837 allows creation of chroots without the procfs mounted on /proc.
1839 * The `crypt' function now fails if passed salt bytes that violate the
1840 specification for those values. On Linux, the `crypt' function will
1841 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1842 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1843 when the mode is enabled.
1845 * The `clock_*' suite of functions (declared in <time.h>) is now available
1846 directly in the main C library. Previously it was necessary to link with
1847 -lrt to use these functions. This change has the effect that a
1848 single-threaded program that uses a function such as `clock_gettime' (and
1849 is not linked with -lrt) will no longer implicitly load the pthreads
1850 library at runtime and so will not suffer the overheads associated with
1851 multi-thread support in other code such as the C++ runtime library.
1853 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1858 * The following bugs are resolved with this release:
1860 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1861 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1862 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1863 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1864 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1865 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1866 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1867 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1868 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1869 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1870 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1871 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1872 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1873 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1874 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1875 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1876 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1877 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1878 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1879 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1880 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1881 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1884 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1885 configuring glibc with:
1886 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1887 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1888 Implemented by H.J. Lu.
1892 + define static_assert
1894 + do not declare gets
1896 + declare at_quick_exit and quick_exit also for ISO C11
1898 + aligned_alloc. NB: The code is deliberately allows the size parameter
1899 to not be a multiple of the alignment. This is a moronic requirement
1900 in the standard but it is only a requirement on the caller, not the
1903 + timespec_get added
1905 + uchar.h support added
1907 + CMPLX, CMPLXF, CMPLXL added
1909 Implemented by Ulrich Drepper.
1911 * Support for the IA-64 has been moved to ports.
1913 * Remove support for anything but ELF binary format
1915 * Checking versions of poll, ppoll added.
1916 Implemented by Ulrich Drepper.
1918 * More generic and 64-bit performance optimizations to math functions.
1919 Implemented by Ulrich Drepper.
1921 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1922 headers and functions available at compile time as they were before
1923 version 2.14. This option will be removed at some time in the future
1924 after the TI-RPC library becomes fully sufficient for the needs of
1925 existing applications.
1927 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1928 Note that glibc is not expected to work with any Linux kernel version
1931 * New header <sys/auxv.h> and function getauxval allowing easy access to
1932 the AT_* key-value pairs passed from the Linux kernel. The header also
1933 defines the HWCAP_* bits associated with the AT_HWCAP key.
1935 * New locales: mag_IN
1937 * New configure option --enable-systemtap builds SystemTap static probes
1938 into libc for setjmp and longjmp and into libpthread for various operations.
1939 So far the setjmp/longjmp probes and some of the libpthread probes are
1940 provided only for i*86 and x86_64.
1941 Implemented by Roland McGrath and Rayson Ho.
1943 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1945 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1948 * More optimized functions for SPARC. Implemented by David S. Miller.
1950 * Improved support for cross-compilation, especially bootstrap builds
1951 without a previously built glibc.
1953 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1954 Chris Metcalf from Tilera.
1956 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1957 now supported for ARM processors.
1959 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1960 as the name of the dynamic linker, to distinguish it from the
1961 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1963 * Support for CRIS has been removed from ports.
1965 * A new class of installed header has been documented for low-level
1966 platform-specific functionality. PowerPC added the first instance with a
1967 function to provide time base register access. Contributed by Tulio
1968 Magno Quites Machado Filho.
1970 * ix86 configurations now install header files that are consistent with
1971 what x86-64 configurations install. These same header files can be used
1972 for -m32, -m64, or -mx32 builds.
1973 Contributed by H.J. Lu.
1975 * Math library bug fixes. A thorough audit of all open math library bugs was
1976 conducted by Joseph Myers. Significant progress was made on many math
1977 library bugs resulting in more accurate exceptions and function results.
1978 Many thanks to all those that contributed including Andreas Jaeger for his
1979 patch review and work on the x87 trigonometric instruction issues.
1981 * Timezone data is no longer installed. Timezone-related binaries and scripts
1982 will continue to be installed. Users should obtain their timezone data from
1983 their distribution provider or from the tzdata package at
1984 <ftp://munnari.oz.au/pub/>.
1988 * The following bugs are resolved with this release:
1990 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1991 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1992 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1993 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1994 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1995 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1996 13484, 13506, 13515, 13523, 13524, 13538, 13540
1998 * New program pldd to list loaded object of a process
1999 Implemented by Ulrich Drepper.
2001 * Add nss_db support back to glibc. No more dependency on Berkeley db
2002 and support for initgroups lookups.
2003 Implemented by Ulrich Drepper.
2005 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
2006 Contributed by HJ Lu.
2008 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
2009 Contributed by HJ Lu.
2011 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
2012 on x86-32 and x86-64.
2013 Contributed by Liubov Dmitrieva.
2015 * Optimized strchr and strrchr for SSE on x86-32.
2016 Contributed by Liubov Dmitrieva.
2018 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
2019 for x86-64 and x86-32.
2020 Contributed by Liubov Dmitrieva.
2022 * New interfaces: scandirat, scandirat64
2023 Implemented by Ulrich Drepper.
2025 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
2026 Implemented by Ulrich Drepper.
2028 * nscd now also caches the netgroup database.
2029 Implemented by Ulrich Drepper.
2031 * Integrate libm with gcc's -ffinite-math-only option.
2032 Implemented by Ulrich Drepper.
2034 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
2035 to math functions. Implemented by Ulrich Drepper.
2037 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
2038 Implemented by Ulrich Drepper.
2040 * New Linux interfaces: process_vm_readv, process_vm_writev
2042 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
2043 Implemented by Ulrich Drepper.
2045 * Optimized nearbyint and strcasecmp for PPC.
2046 Implemented by Adhemerval Zanella.
2048 * New locales: bho_IN, unm_US, es_CU, ta_LK
2052 * The following bugs are resolved with this release:
2054 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
2055 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
2056 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
2057 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
2058 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
2059 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
2060 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
2061 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
2062 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
2063 12795, 12811, 12813, 12814, 12841
2065 * The RPC implementation in libc is obsoleted. Old programs keep working
2066 but new programs cannot be linked with the routines in libc anymore.
2067 Programs in need of RPC functionality must be linked against TI-RPC.
2068 The TI-RPC implementation is IPv6 enabled and there are other benefits.
2070 Visible changes of this change include (obviously) the inability to link
2071 programs using RPC functions without referencing the TI-RPC library and the
2072 removal of the RPC headers from the glibc headers.
2073 Implemented by Ulrich Drepper.
2075 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
2076 syncfs, setns, sendmmsg
2078 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
2079 yue_HK, lij_IT, mhr_RU
2081 * New encodings: CP770, CP771, CP772, CP773, CP774
2083 * New program sotruss to trace calls through PLTs
2084 Implemented by Ulrich Drepper.
2086 * The malloc hook implementation is marked deprecated and will be removed
2087 from the default implementation in the next version. The design never
2088 worked ever since the introduction of threads. Even programs which do
2089 not create threads themselves can use multiple threads created internally.
2093 * The following bugs are resolved with this release:
2095 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
2096 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
2097 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
2098 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
2101 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
2103 * POWER7 optimizations: memset, memcmp, strncmp
2105 * New optimized string functions for x86-64: strnlen (SSE2),
2106 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
2107 Implemented by Ulrich Drepper.
2111 * The following bugs are resolved with this release:
2113 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
2114 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
2115 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
2116 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
2117 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
2118 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
2119 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
2120 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
2122 * New interfaces: pthread_getname_np, pthread_setname_np
2124 * New Linux interface: recvmmsg
2126 * STT_GNU_IFUNC implemented for Sparc by David Miller.
2128 * The dynamic linker now recognizes supported ABI versions from the
2129 EI_ABIVERSION field in the ELF header.
2130 Implemented by Ulrich Drepper.
2132 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
2133 will not be used to fill in password fields in the passwd.byname replies.
2134 Instead it is used to synthesize the shadow.byname table, should it be
2135 missing. This is a useful mode in some installations involving Solaris.
2136 Implemented by Ulrich Drepper.
2138 * New locales: kok_IN, sq_MK, cv_RU
2142 * The following bugs are resolved with this release:
2144 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
2145 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
2146 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
2147 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
2148 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
2149 10789, 10817, 10823, 10840, 10847
2151 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
2153 Implemented by Ulrich Drepper.
2155 * Checking version of longjmp added that fails if an uninitialized stack
2156 frame would be created. Implemented by Ulrich Drepper.
2158 * STT_GNU_IFUNC is now supported in static executables.
2159 Implemented by H.J. Lu.
2161 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
2163 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
2164 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
2165 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
2166 Contributed by H.J. Lu.
2168 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
2169 Implemented by Ulrich Drepper.
2171 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
2173 Contributed by H.J. Lu.
2175 * Support for fma instruction in AVX on x86-64.
2176 Implemented by H.J. Lu and Ulrich Drepper.
2178 * AVX support in x86-64 auditing support in ld.so.
2179 Implemented by H.J. Lu.
2181 * STB_GNU_UNIQUE support added.
2182 Implemented by Ulrich Drepper.
2184 * Implement second fallback mode for optimized DNS lookup for even more
2185 broken environments. If two requests from the same port are not
2186 handled correctly close the socket and open a new one before sending
2187 the second request. The 'single-request-reopen' option in /etc/resolv.conf
2188 can be used to select this mode right away, instead of rediscovering the
2189 necessity is every process again.
2190 Implemented by Ulrich Drepper.
2192 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
2193 Implemented by Adam Tkac.
2195 * Optimized iconv conversions for S390x.
2196 Implemented by Andreas Krebbel.
2198 * Using condvars with PI mutexes is now more efficient due to kernel
2199 support for requeueing to PI futexes. NPTL support added for x86-64.
2200 Implemented by Ulrich Drepper.
2202 * New locales: ps_AF, my_MM
2206 * The following bugs are resolved with this release:
2208 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
2209 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
2210 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
2211 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
2212 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
2214 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
2215 Implemented by Ulrich Drepper.
2217 * New Linux interfaces: accept4, fallocate, fallocate64.
2218 Implemented by Ulrich Drepper.
2220 * Correct declarations of string function when used in C++ code. This
2221 could lead to compile errors for invalid C++ code.
2223 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
2226 * New POSIX 2008 interface: psiginfo
2227 Implemented by Ulrich Drepper.
2229 * New ISO C++1x interfaces: quick_exit, at_quick_exit
2230 Implemented by Ulrich Drepper.
2232 * Support for selecting between multiple function definitions at runtime
2233 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
2235 * The libcrypt library can now use the hash function implementations in
2236 NSS. Implemented by Ulrich Drepper.
2238 * The malloc implementation can be compiled to be less memory efficient
2239 but higher performing in multi-threaded programs.
2240 Implemented by Ulrich Drepper.
2242 * New locales: nan_TW@latin, ks_IN
2244 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
2245 Implemented by Ulrich Drepper.
2247 * Extended printf hook support. It is possible to use user-defined types
2248 and extend existing format specifiers.
2249 Implemented by Ulrich Drepper.
2251 * Handling for group shadow files has been added.
2252 Implemented by Ulrich Drepper.
2254 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
2255 servers (the case, e.g., for some people using the built-in DNS
2256 server in ADSL modems/routers). There is a once-per-process timeout
2257 in case of a broken server. To avoid it, users can run nscd or put
2258 'options single-request' in /etc/resolv.conf.
2259 Implemented by Ulrich Drepper.
2263 * The following bugs are resolved with this release:
2265 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
2266 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
2267 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
2268 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
2269 6968, 6974, 6980, 6995, 7008, 7009, 7029
2271 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
2272 up at the same time. Implemented by Ulrich Drepper.
2274 * TLS descriptors for LD and GD on x86 and x86-64.
2275 Implemented by Alexandre Oliva.
2277 * getaddrinfo now handles DCCP and UDPlite.
2278 Implemented by Ulrich Drepper.
2280 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
2281 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
2282 Implemented by Ulrich Drepper.
2284 * New implementation of memmem, strstr, and strcasestr which is O(n).
2285 Implemented by Eric Blake.
2287 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
2289 * Implement "e" option for popen to open file descriptor with the
2290 close-on-exec flag set. Implemented by Ulrich Drepper.
2292 * Implement "b" mode for fmemopen. In this mode writes writes don't
2293 implicitly add a NUL byte and seeks from the end of the buffer really
2294 use the buffer end, not the string length as the basis.
2295 Implemented by Ulrich Drepper.
2297 * Many functions, exported and internal, now atomically set the close-on-exec
2298 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
2300 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
2302 Implemented by Pravin Satpute.
2304 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
2308 * The following bugs are resolved with this release:
2310 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
2311 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
2312 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
2313 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
2314 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
2315 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
2316 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
2318 * New locales: bo_CN, bo_IN, shs_CA.
2320 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
2322 * Sorting rules for some Indian languages (Devanagari and Gujarati).
2323 Implemented by Pravin Satpute.
2325 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
2327 * nscd caches now all timeouts for DNS entries
2328 Implemented by Ulrich Drepper.
2330 * nscd is more efficient and wakes up less often.
2331 Implemented by Ulrich Drepper.
2333 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
2334 vdprintf, and obstack_vprintf.
2335 Implemented by Jakub Jelinek.
2337 * Faster memset for x86-64.
2338 Implemented by Harsha Jagasia and H.J. Lu.
2340 * Faster memcpy on x86.
2341 Implemented by Ulrich Drepper.
2343 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
2344 Implemented by Ulrich Drepper.
2346 * Faster sqrt and sqrtf implemention for some PPC variants.
2347 Implemented by Steven Munroe.
2351 * The following bugs are resolved with this release:
2353 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
2354 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
2355 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
2356 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
2357 5071, 5103, 5104, 5112, 5113, 5184, 5186
2359 * More checking functions: fread, fread_unlocked, open*, mq_open.
2360 Implemented by Jakub Jelinek and Ulrich Drepper.
2362 * Extend fortification to C++. Implemented by Jakub Jelinek.
2364 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
2365 by not recognizing 'a' as a modifier when those specs are requested.
2366 Implemented by Jakub Jelinek.
2368 * PPC optimizations to math and string functions.
2369 Implemented by Steven Munroe.
2371 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
2372 options to be passed. Implemented by Ulrich Drepper.
2374 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
2376 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
2377 Implemented by Ulrich Drepper.
2379 * Handle private futexes in the NPTL implementation.
2380 Implemented by Jakub Jelinek and Ulrich Drepper.
2382 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2383 Implemented by Roland McGrath and Ulrich Drepper.
2385 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2387 * SHA-256 and SHA-512 based password encryption.
2388 Implemented by Ulrich Drepper.
2390 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2391 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2394 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2395 Implemented by Ulrich Drepper.
2399 * The following bugs are resolved with this release:
2401 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2402 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2403 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2404 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2405 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2406 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2407 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2410 * New Linux interfaces: epoll_pwait, sched_getcpu.
2412 * New generic interfaces: strerror_l.
2414 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2418 * The following bugs are resolved with this release:
2420 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2421 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2422 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2423 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2424 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2425 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2426 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2427 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2428 3225, 3251, 3252, 3253, 3273
2430 * For Linux, the sorting of addresses returned by getaddrinfo now also
2431 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2432 Implemented by Ulrich Drepper.
2434 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2435 Implemented by Ulrich Drepper.
2437 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2439 * New iconv module for MIK. Contributed by Alexander Shopov.
2441 * For sites with broken group and/or passwd database, the auto-propagate
2442 option of nscd can prevent creating ID lookup entries from the results
2443 of a name lookup and vice versa. This usually is no problem but some
2444 site might have problems with the default behavior.
2445 Implemented by Ulrich Drepper.
2447 * Iterating over entire database in NIS can be slow. With the
2448 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2449 to trade time for memory. The entire database will be read at once.
2450 Implemented by Ulrich Drepper.
2452 * The interfaces introduced in RFC 3542 have been implemented by
2455 * Support for the new ELF hash table format was added by Ulrich Drepper.
2457 * Support for priority inheritance mutexes added by Jakub Jelinek and
2460 * Support for priority protected mutexes added by Jakub Jelinek.
2462 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2463 or_IN, csb_PL, fy_NL, sr_ME.
2467 * More overflow detection functions.
2469 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2470 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2472 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2473 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2474 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2475 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2476 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2477 by Masahide Washizawa.
2479 * It is now possible to install audit libraries for the dynamic linker using
2480 LD_AUDIT. Implemented by Ulrich Drepper.
2482 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2483 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2484 For a libc and libpthread that works well on Linux 2.4 kernels, we
2485 recommend using the stable 2.3 branch.
2487 * The new function open_wmemstream acts like open_memstream,
2488 but uses a wchar_t wide character buffer.
2490 * The new function ppoll is an improved version of poll, similar to pselect.
2492 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2493 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2494 renameat, unlinkat, linkat, symlinkat, readlinkat.
2496 * New Linux kernel system calls: unshare,
2497 inotify_init, inotify_add_watch, inotify_rm_watch.
2499 * The euidaccess function is now also known by the alias eaccess,
2500 for compatibility with some other systems.
2502 * Timezone data updated to 2006b version.
2506 * The following bugs are resolved with this release:
2508 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2509 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2510 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2511 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2512 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2513 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2515 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2517 * As of this release, GCC 4 can be used to compile the C Library.
2519 * Timezone data updated to 2005m version.
2523 * The following bugs are resolved with this release:
2525 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2526 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2527 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2528 777, 787, 821, 822, 823, 825
2530 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2534 * Support for RFC 3678. Real implementations exist only for Linux so far.
2535 Implemented by Ulrich Drepper.
2537 * nscd can now cache entries persistently. Expiring entries are reloaded.
2538 For speedups the cache can be shared in memory with client processes.
2539 Implemented by Ulrich Drepper.
2541 * nscd can now perform SELinux checks.
2542 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2544 * getaddrinfo queries are now cached. Canonical name lookup is performed
2546 Implemented by Ulrich Drepper.
2548 * The nothrow function attribute is used when headers are used by gcc when
2549 compiling C code. This can avoid significant amounts of exception
2552 * The malloc functions perform more error checking and are stricter when
2553 it comes to reacting on errors. The default action is to terminate
2554 the process after showing an error message. Implemented by Ulrich Drepper.
2556 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2557 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2559 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2560 namespaces using the new function dlmopen(). This feature is of course,
2561 like most other dynamic loading functionality, not available in statically
2562 linked applications. Implemented by Ulrich Drepper.
2564 * Low-overhead boundary checking variants of string and some stdio functions
2565 were added. These are to be used in conjunction with a gcc patch by
2566 Jakub Jelinek which adds calls to these functions if possible.
2567 Implemented by Jakub Jelinek and Ulrich Drepper.
2569 * Old code for several operating systems and machine architectures that
2570 have not been in working condition in a long time have been removed from
2571 the main source tree maintained by the GNU C Library's maintainers.
2572 These files are now reside in the separate `ports' source module
2573 that is usable as an add-on when building the library.
2577 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2578 interrogate the dynamic linker, compatible with the Solaris interface.
2580 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2581 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2583 * getifaddrs now uses the netlink interface on Linux to get its information.
2584 Implemented by Thorsten Kukuk.
2586 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2587 Implemented by Ulrich Drepper.
2589 * support for non-executable stacks on x86 has been added. Changes mostly
2592 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2595 * getaddrinfo now performs destination address selection according to
2600 * Thread-safe interfaces for many functions that access locale data
2601 were added in version 2.3, but these features were omitted from NEWS.
2602 Many functions have variants with an `_l' suffix that take a `locale_t'
2603 object as a parameter rather than consulting the current locale.
2604 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2605 create and maintain `locale_t' objects. Additionally, the new function
2606 `uselocale' sets "the current locale" (as used by functions not so
2607 parameterized) set for an individual thread. These features were added
2608 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2610 * The functions getresuid, getresgid, setresuid, and setresgid, which
2611 have long been available on Linux, are now declared in <unistd.h>
2612 and are now also available on the Hurd.
2614 * ELF thread-local storage support (TLS) now works on x86-64.
2616 * The new dynamic string token $LIB is expanded in shared library names.
2617 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2619 * Aldy Hernandez contributed complete software floating point support for
2620 PowerPC machines with no FPU.
2622 * fexecve is implemented on Linux.
2624 * The `btowc' function should work at least twice as fast due to
2625 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2627 * With approriate thread add-ons cancelable functions are now implemented
2628 in libc.so as well. No need to call the function in libpthread. This
2629 change allowed to finally disable the incorrect and expensive handling
2630 of weak definition in ld.so.
2632 * Yet more PLT entries in libc.so have been removed. We finally arrived
2633 at the bare minimum. Startup times improved appropriately.
2635 * Support for the new Linux/x86 system call interface was added. The
2636 AT_SYSINFO auxiliary vector entry is recognized and handled.
2640 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2643 * iconv (the program and the interface) now accepts empty names (excluding
2644 options like //TRANSLIT) to mean "use charset of current locale".
2646 * localedef can now transliterate characters in strings which are not in
2647 the provided charmap. The information from the input locale is used.
2649 * Prelinking support was added for ELF targets. This requires additional
2650 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2652 * Read-only stdio streams now use mmap to speed up operation by eliminating
2653 copying and buffer underflows. To use add 'm' to the mode string of
2654 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2656 * The malloc functions were completely rewritten by Wolfram Gloger based
2657 on Doug Lea's malloc-2.7.0.c.
2659 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2660 implementation of regex.
2662 * Bruno Haible upgraded the iconv and locale implementation to support
2665 * Contents of the LC_* and LANG environment variables in the CEN style are
2666 not recognized anymore. It never was used. Change by Ulrich Drepper.
2668 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2669 thread-local storage (TLS) ABI on some platforms.
2670 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2672 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2673 EUC-JISX0213, and TSCII.
2675 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2676 BSD-compatible interface for getting all network interface addresses.
2677 Implementation for IPv4 by Roland McGrath.
2679 * Loading of locale data is faster due to the introduction of a locale
2680 archive. Implemented by Roland McGrath and Ulrich Drepper.
2682 * Startup times are significantly reduced by not using exported functions
2683 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2686 * Steven Munroe contributed a port to PowerPC64/Linux.
2690 * The Hurd now uses the GNU libio implementation of stdio rather than the
2691 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2693 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2694 with the same behavior as the Linux system call of the same name.
2698 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2699 128-bit long double format.
2701 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2702 IBM1161, and IBM1162 charsets.
2704 * Andreas Jaeger contributed a port to x86-64/Linux.
2706 * Peter Bruin contributed a port to PowerPC/Hurd.
2708 * libc functions using I/O streams now can handle wide-oriented streams
2711 * optimizations in the dynamic linker. Binaries created by recent binutils
2712 versions start up quicker due to reduced time spent on relocations.
2714 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2718 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2719 asinh, atanh, j0 for the 128-bit long double format.
2721 * Bruno Haible updated all the code handling Unicode in some form to
2722 support Unicode 3.1.
2724 * Speed of regex for single-byte locales is back to previous levels.
2725 Patch by Isamu Hasegawa.
2727 * Alpha, SPARC, and IA-64 now also using floating stacks.
2729 * Startup time of internationalized applications greatly improved through
2730 iconv cache. Use iconvconfig to generate the cache file.
2731 Contributed by Ulrich Drepper.
2733 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2734 severe performance problems. Patch by David Mosberger.
2736 * The Hurd port got a lot more functionality like AIO, various stdio
2737 extensions, etc. Mainly done by Roland McGrath.
2739 * mtrace can now lookup symbols in shared libraries.
2743 * Intel's IA-64 math library is largely integrated. It provides fast and
2744 accurate implementatations for most basic and standard math functions
2745 in float, double, and long double format.
2747 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2748 and asin for the 96-bit long double format and asin, log, tan for the
2749 128-bit long double format.
2751 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2752 The basic double functions exist today. Contributed by Abraham Ziv
2753 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2754 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2756 * An asynchronous name lookup library was added. The interface is designed
2757 after POSIX AIO. The proposal was circulated beforehand to get comments.
2758 No negative ones came in. Implemented by Ulrich Drepper.
2760 * Port to S390/64bit contributed by Martin Schwidefsky
2761 <schwidefsky@de.ibm.com>.
2763 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2764 of functions for Linux/IA-64.
2766 * The RPC code is now thread safe. Threads can now use the same service
2767 of different services at the same time. Patch by Eric Norum
2768 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2770 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2771 family of functions for Linux/S390.
2773 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2774 of functions for Linux/x86.
2776 * Port to Linux/CRIS contributed by Axis Communications.
2780 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2781 we can now check for namespace violations and missing declarations. The
2782 result is that almost all headers are now Unix-compliant (as defined in
2783 the upcoming XPG6). The negative side is that some programs might need
2784 corrections, too, if they depend on the incorrect form of the headers in
2785 previous versions which defined too many symbols and included too many
2788 * regex now handles multibyte character sets correctly.
2789 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2791 * iconv (the program) does now conform to the upcoming XPG6 and handles
2792 charmaps. Instead of the charset names the path of charmaps can be
2793 provided and the conversion happens based on this data.
2794 Contributed by Ulrich Drepper.
2796 * The locale program now provides detailed information about the installed
2801 only lists the names of the supported locales
2805 provides details such as country, language, and codeset name.
2806 Contributed by Ulrich Drepper.
2810 * The gencat program now parses the input file according to the charset
2811 selected by the LC_CTYPE category. This is important for stateful
2812 character sets. To make generating catalogs easier there is a way
2813 to overwrite the charset selected by the locale: before the first
2814 message or $ quote line the catalog can contain a line like
2816 $ codeset=ISO-8859-2
2818 to select the charset (ISO-8859-2 in this case).
2820 Implemented by Shinya Hanataka and Ulrich Drepper.
2822 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2823 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2824 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2826 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2827 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2829 * The LANGUAGE environment variable is now ignored unless the locale is
2830 changed from the default "C" locale.
2832 * The usual bug fixes.
2836 * Greg McGary added runtime support for bounds checking using gcc's
2837 new -fbounded-pointers option. ix86 target is complete. PowerPC
2840 * Thorsten Kukuk added secure mode support to nscd.
2842 * The Berkeley db libraries have been removed.
2844 Related, the nss_db module is now in a separate package since it
2845 obviously requires a database library being available.
2847 * Wide character I/O streams implemented by Ulrich Drepper.
2849 * Functions from the extended socket API added by Ulrich Drepper.
2851 * Functions feenableexcept and fedisableexcept to control the
2852 behaviour of individual exceptions have been added by Andreas Jaeger.
2854 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2856 * The resolver code has been updated from bind 8.2.3-T5B which supports
2857 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2860 This change could in some situations effect backward compatibility. Since
2861 now `_res' is a thread-local instead of a global variable, modifying it
2862 in one thread does not have any effect in other threads.
2864 The resolver library was also extended to allow IPv6 as the transport
2865 protocol for the requests. This work was done by Stig Venaas.
2867 * Compatibility code for K&R C compilers has been removed from the
2868 header files. A ISO C compiler is needed to use the library
2869 (conforming to either C89 or C99 standard).
2871 * Complete rewrite of the localedef program to support multibyte character
2872 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2873 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2874 Implemented by Ulrich Drepper.
2876 Bruno Haible significantly improved the generation and use of the data
2877 structures for the wide character tables.
2879 * Plural handling in gettext implemented by Ulrich Drepper.
2881 * The utmp daemon has been removed.
2883 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2885 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2888 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2890 * POSIX barriers implemented by Kaz Kylheku.
2892 * POSIX spawn function family implemented by Ulrich Drepper.
2894 * POSIX spinlocks are now available.
2896 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2898 * the configure option --enable-kernel=X.Y.Z allows to strip out
2899 compatibility for kernel versions before X.Y.Z. This is currently only
2900 implemented for Linux.
2902 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2903 field sin6_scope_id. This means that all programs using IPv6 should be
2904 recompiled. Don't expect binary compatibility with previous glibc
2907 * various conversion modules for IBM character sets contributed by
2910 * IA-64 port by Jes Sorensen and HJ Lu.
2924 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2926 * New xdr functions are added; some rpc functions are now 64bit clean.
2928 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2930 * Fixed known incompatibilities with glibc 2.0.
2932 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2934 * Optimized a number of functions (especially the ELF dynamic loader).
2936 * Update timezone data files.
2938 * lots of charmaps corrections
2940 * some new locale definitions and charmaps
2945 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2946 conform to POSIX member type requirements. Symbol versions have been
2947 adjusted as needed within the library, and for direct use by applications,
2948 but there is potential for problems if third-party libraries use
2949 struct timeval as part of their interface. This does not present
2950 a problem for X and other "essential" system libraries.
2952 * An additional locale model to support C++ Standard Library locale
2953 model and probably more was implemented by Ulrich Drepper.
2955 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2958 * Miles Bader provided the `argp' function family to support hierachical
2959 command line argument parsing, layered on top of getopt.
2961 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2963 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2966 * scanf recognizes the %a and %A format for scanning floating point numbers.
2968 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2969 information and interfaces for the available integer types.
2971 * about 130 new math functions were added to implement the ISO C9x math
2974 * the new header <complex.h> contains definitions of the complex math
2975 functions from ISO C 9X.
2977 * the new header <tgmath.h> defines generic macros to use complex or
2978 real valued functions.
2980 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2982 * Andreas Jaeger provided a test suite for the math library.
2984 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2986 * Ulrich Drepper added character set conversion functions (iconv).
2988 * Optimized string functions have been added.
2990 * The localedata addon is now part of glibc.
2992 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2994 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2995 daemon for NSS (nscd).
2997 Missing a better place here are some numbers on improvements. Under
2998 Linux 2.1.125 un-tar-ing the kernel sources takes
3002 using local files 12.19s 6.88s 22.91s
3004 using NIS 13.92s 8.91s 26.34s
3006 using NIS & nscd 10.37s 7.34s 25.30s
3008 using NIS+ 27.57s 30.37s 640.46s
3010 using NIS+ & nscd 10.25s 7.83s 26.51s
3012 using NIS & old nscd [1] 13.83s 8.32s 29.60s
3014 Keep in mind that non-namelookup related operations dominate above times.
3015 It was just a common complain that using NIS+ unpacking the kernel is
3018 [1] The old nscd implementation is not available anymore since it was
3019 distributed with glibc up to version 2.0.98 and thus is now replaced.
3021 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
3023 * Mark Kettenis provided a Hesiod NSS module.
3025 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
3026 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
3028 * rcmd can now handle netgroups (Dick Streefland).
3030 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
3033 * Support for the IPv6 protocol has been added to the socket API, as per the
3034 latest draft standards.
3036 * Support for Linux 2.2 has been added.
3038 * Interface changes relative to the latest 2.0.x release:
3039 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3040 addseverity NEW: Unix98
3041 alphasort64 NEW: LFS
3042 argp_err_exit_status NEW: argp, GNU ext
3043 argp_error NEW: argp, GNU ext
3044 argp_failure NEW: argp, GNU ext
3045 argp_help NEW: argp, GNU ext
3046 argp_parse NEW: argp, GNU ext
3047 argp_program_bug_address NEW: argp, GNU ext
3048 argp_program_version NEW: argp, GNU ext
3049 argp_program_version_hook NEW: argp, GNU ext
3050 argp_state_help NEW: argp, GNU ext
3051 argp_usage NEW: argp, GNU ext
3052 authdes_create NEW: Secure RPC
3053 authdes_getucred NEW: Secure RPC
3054 authdes_pk_create NEW: Secure RPC
3055 backtrace NEW: GNU ext.
3056 backtrace_symbols NEW: GNU ext.
3057 backtrace_symbols_fd NEW: GNU ext.
3059 cacosf NEW: ISO C 9x
3060 cacosh NEW: ISO C 9x
3061 cacoshf NEW: ISO C 9x
3062 cacoshl NEW: ISO C 9x
3063 cacosl NEW: ISO C 9x
3070 casinf NEW: ISO C 9x
3071 casinh NEW: ISO C 9x
3072 casinhf NEW: ISO C 9x
3073 casinhl NEW: ISO C 9x
3074 casinl NEW: ISO C 9x
3076 catanf NEW: ISO C 9x
3077 catanh NEW: ISO C 9x
3078 catanhf NEW: ISO C 9x
3079 catanhl NEW: ISO C 9x
3080 catanl NEW: ISO C 9x
3081 cbc_crypt NEW: Secure RPC
3085 ccoshf NEW: ISO C 9x
3086 ccoshl NEW: ISO C 9x
3092 cimagf NEW: ISO C 9x
3093 cimagl NEW: ISO C 9x
3094 clearerr_locked REMOVED
3095 clntunix_create NEW: sunrpc ext
3097 clog10 NEW: ISO C 9x
3098 clog10f NEW: ISO C 9x
3099 clog10l NEW: ISO C 9x
3109 cprojf NEW: ISO C 9x
3110 cprojl NEW: ISO C 9x
3112 crealf NEW: ISO C 9x
3113 creall NEW: ISO C 9x
3118 csinhf NEW: ISO C 9x
3119 csinhl NEW: ISO C 9x
3122 csqrtf NEW: ISO C 9x
3123 csqrtl NEW: ISO C 9x
3127 ctanhf NEW: ISO C 9x
3128 ctanhl NEW: ISO C 9x
3130 des_setparity NEW: Secure RPC
3131 ecb_crypt NEW: Secure RPC
3132 endutxent NEW: Unix98
3134 exp10f NEW: ISO C 9x
3135 exp10l NEW: ISO C 9x
3139 fattach NEW: STREAMS
3140 fdetach NEW: STREAMS
3144 feclearexcept NEW: ISO C 9x
3145 fegetenv NEW: ISO C 9x
3146 fegetexceptflag NEW: ISO C 9x
3147 fegetround NEW: ISO C 9x
3148 feholdexcept NEW: ISO C 9x
3150 feraiseexcept NEW: ISO C 9x
3151 ferror_locked REMOVED
3152 fesetenv NEW: ISO C 9x
3153 fesetexceptflag NEW: ISO C 9x
3154 fesetround NEW: ISO C 9x
3155 fetestexcept NEW: ISO C 9x
3156 feupdateenv NEW: ISO C 9x
3157 fflush_locked REMOVED
3161 fgets_unlocked NEW: GNU ext.
3162 fileno_locked REMOVED
3174 fputc_locked REMOVED
3175 fputs_unlocked NEW: GNU ext.
3176 fread_unlocked NEW: GNU ext.
3181 fstatvfs NEW: Unix98
3185 ftruncate64 NEW: LFS
3187 fwrite_unlocked NEW: GNU ext.
3188 gai_strerror NEW: IPv6
3192 getchar_locked REMOVED
3194 getdate_err NEW: Unix98
3195 getdate_r NEW: GNU ext.
3197 getnameinfo NEW: IPv6
3198 getnetname NEW: Secure RPC
3199 getpmsg NEW: STREAMS
3200 getpt NEW: Unix98 PTY
3201 getrlimit64 NEW: LFS
3202 getutxent NEW: Unix98
3203 getutxid NEW: Unix98
3204 getutxline NEW: Unix98
3205 glob64 NEW: GNU ext.
3206 globfree64 NEW: GNU ext.
3207 gnu_get_libc_release NEW: GNU ext.
3208 gnu_get_libc_version NEW: GNU ext.
3209 grantpt NEW: Unix98 PTY
3210 host2netname NEW: Secure RPC
3212 iconv_close NEW: iconv
3213 iconv_open NEW: iconv
3214 if_freenameindex NEW: IPv6
3215 if_indextoname NEW: IPv6
3216 if_nameindex NEW: IPv6
3217 if_nametoindex NEW: IPv6
3218 in6addr_any NEW: IPv6
3219 in6addr_loopback NEW: IPv6
3220 inet6_isipv4mapped NEW: IPv6
3221 isastream NEW: STREAMS
3222 iswblank NEW: GNU ext.
3223 key_decryptsession NEW: Secure RPC
3224 key_decryptsession_pk NEW: Secure RPC
3225 key_encryptsession NEW: Secure RPC
3226 key_encryptsession_pk NEW: Secure RPC
3227 key_gendes NEW: Secure RPC
3228 key_get_conv NEW: Secure RPC
3229 key_secretkey_is_set NEW: Secure RPC
3230 key_setnet NEW: Secure RPC
3231 key_setsecret NEW: Secure RPC
3232 llrint NEW: ISO C 9x
3233 llrintf NEW: ISO C 9x
3234 llrintl NEW: ISO C 9x
3235 llround NEW: ISO C 9x
3236 llroundf NEW: ISO C 9x
3237 llroundl NEW: ISO C 9x
3242 lrintf NEW: ISO C 9x
3243 lrintl NEW: ISO C 9x
3244 lround NEW: ISO C 9x
3245 lroundf NEW: ISO C 9x
3246 lroundl NEW: ISO C 9x
3248 makecontext NEW: Unix98
3249 mempcpy NEW: GNU ext.
3252 modify_ldt NEW: kernel
3256 nearbyint NEW: ISO C 9x
3257 nearbyintf NEW: ISO C 9x
3258 nearbyintl NEW: ISO C 9x
3259 netname2host NEW: Secure RPC
3260 netname2user NEW: Secure RPC
3261 nexttoward NEW: ISO C 9x
3262 nexttowardf NEW: ISO C 9x
3263 nexttowardl NEW: ISO C 9x
3267 passwd2des NEW: Secure RPC
3269 pow10f NEW: GNU ext.
3270 pow10l NEW: GNU ext.
3273 printf_size NEW: GNU ext.
3274 printf_size_info NEW: GNU ext.
3275 profil_counter REMOVED
3276 pthread_mutexattr_getkind_np REPLACED
3277 pthread_mutexattr_setkind_np REPLACED
3278 ptsname NEW: Unix98 PTY
3279 ptsname_r NEW: Unix98 PTY
3281 putchar_locked REMOVED
3282 putgrent NEW: GNU ext.
3284 putpmsg NEW: STREAMS
3285 pututxline NEW: Unix98
3289 readdir64_r NEW: LFS
3290 remquo NEW: ISO C 9x
3291 remquof NEW: ISO C 9x
3292 remquol NEW: ISO C 9x
3294 roundf NEW: ISO C 9x
3295 roundl NEW: ISO C 9x
3297 scalbln NEW: ISO C 9x
3298 scalblnf NEW: ISO C 9x
3299 scalblnl NEW: ISO C 9x
3301 sendfile NEW: kernel
3302 setcontext NEW: Unix98
3303 setrlimit64 NEW: LFS
3304 setutxent NEW: Unix98
3306 sigignore NEW: Unix98
3307 sigqueue NEW: POSIX.1b
3308 sigrelse NEW: Unix98
3309 sigset NEW: POSIX.1b
3310 sigtimedwait NEW: POSIX.1b
3311 sigwaitinfo NEW: POSIX.1b
3312 sincos NEW: GNU ext.
3313 sincosf NEW: GNU ext.
3314 sincosl NEW: GNU ext.
3318 strcasestr NEW: GNU ext.
3319 strtoimax NEW: ISO C 9x
3320 strtoumax NEW: ISO C 9x
3321 strverscmp NEW: GNU ext.
3322 svcauthdes_stats NEW: Secure RPC
3323 svcunix_create NEW: sunrpc etx
3324 svcunixfd_create NEW: sunrpc ext
3325 swapcontext NEW: Unix98
3326 tcgetsid NEW: Unix98 PTY
3327 tdestroy NEW: GNU ext.
3328 tgamma NEW: ISO C 9x
3329 tgammaf NEW: ISO C 9x
3330 tgammal NEW: ISO C 9x
3334 truncf NEW: ISO C 9x
3335 truncl NEW: ISO C 9x
3337 unlockpt NEW: Unix98 PTY
3338 updwtmpx NEW: Unix98
3339 user2netname NEW: Secure RPC
3340 utmpxname NEW: Unix98
3341 versionsort NEW: GNU ext.
3342 versionsort64 NEW: GNU ext.
3344 wcscasecmp NEW: GNU ext.
3345 wcsncasecmp NEW: GNU ext.
3346 wcsnlen NEW: GNU ext.
3347 wcstoimax NEW: ISO C 9x
3348 wcstoll NEW: ISO C 9x
3349 wcstoull NEW: ISO C 9x
3350 wcstoumax NEW: ISO C 9x
3352 wordexp NEW: POSIX.2
3353 wordfree NEW: POSIX.2
3354 write_profiling REMOVED
3355 xdecrypt NEW: Secure RPC
3356 xdr_authdes_cred NEW: Secure RPC
3357 xdr_authdes_verf NEW: Secure RPC
3358 xdr_cryptkeyarg NEW: Secure RPC
3359 xdr_cryptkeyarg2 NEW: Secure RPC
3360 xdr_cryptkeyres NEW: Secure RPC
3361 xdr_getcredres NEW: Secure RPC
3362 xdr_key_netstarg NEW: Secure RPC
3363 xdr_key_netstres NEW: Secure RPC
3364 xdr_keybuf NEW: Secure RPC
3365 xdr_keystatus NEW: Secure RPC
3366 xdr_netnamestr NEW: Secure RPC
3367 xdr_sizeof NEW: Secure RPC
3368 xdr_unixcred NEW: sunrpc ext
3369 xencrypt NEW: Secure RPC
3370 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3381 * inet_ntoa is thread-safe
3383 * updwtmp is moved from libutil to libc
3385 * rewrite of cbrt function
3387 * update of timezone data
3401 * add atoll function
3403 * fix complex problems in Berkeley DB code
3405 * fix math functions
3409 * fixed lots of header problems (especially Linux/GNU specific)
3411 * dynamic loader preserves all registers
3413 * Roland McGrath provided support for handling of auxiliary objects in
3414 the ELF dynamic loader.
3416 * support for parallel builds is improved
3420 * GNU extensions are no longer declared by default. To enable them you
3421 must define the macro `_GNU_SOURCE' in your program or compile with
3424 * The library has changed from using GNU ld symbol aliases to using weak
3425 symbols where available. The ELF object file format supports weak
3426 symbols; GNU ld also supports weak symbols in the a.out format. (There
3427 is also now support for other GNU ld extensions in ELF. Use the
3428 `--with-elf' option to configure to indicate you have ELF, and
3429 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3430 of many files which contained only symbol aliases, reducing the size of
3431 the source and the compiled library; many other files were renamed to
3432 less cryptic names previously occupied by the symbol alias files.
3433 There is a new header file <elf.h> for programs which operate on
3434 files in the ELF format.
3436 * Converted to Autoconf version 2, so `configure' has more options.
3437 Run `configure --help' to see the details.
3439 * The library can now be configured to build profiling, highly-optimized
3440 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3441 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3442 `configure' enable building these extra libraries. The shared library is
3443 built by default when using both ELF and GNU ld. When shared libraries
3444 are enabled, the new library `-ldl' is available for arbitrary run-time
3445 loading of shared objects; its interface is defined in <dlfcn.h>. The
3446 new header file <link.h> gives access to the internals of the run-time
3447 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3448 application of same name on other systems and it provides information
3449 about dynamically linked binaries.
3451 * The C library now provides the run-time support code for profiling
3452 executables compiled with `-pg'. Programs can control the profiling code
3453 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3454 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3455 the support for this file format was contributed by David Mosberger-Tang.
3457 * The math code has been replaced with a math library based on fdlibm from
3458 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3459 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3460 functions. The math functions now reside in a separate library, so
3461 programs using them will need to use `-lm' their linking commands.
3463 * John C. Bowman contributed optimized ix87 assembler inline functions.
3465 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3466 mechanism similar to that found in Solaris 2. This is now used for the
3467 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3468 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3469 file controls what services are used for each individual database. This
3470 works by loading shared libraries with names specified in `nsswitch.conf',
3471 so service modules can be changed or added at any time without even
3472 relinking any program. Currently there are the file, db, and NIS based
3473 NSS services available.
3475 * The new functions `strtoq' and `strtouq' parse integer values from
3476 strings, like `strtol' and `strtoul', but they return `long long int' and
3477 `unsigned long long int' values, respectively (64-bit quantities).
3479 * The new functions `strtof' and `strtold' parse floating-point values from
3480 strings, like `strtod', but they return `float' and `long double' values,
3481 respectively (on some machines `double' and `long double' are the same).
3483 * Ulrich Drepper has contributed new implementations of the floating-point
3484 printing and reading code used in the `printf' family of functions and
3485 `strtod', `strtof', and `strtold'. These new functions are perfectly
3486 accurate, and much faster than the old ones.
3488 * The implementation of the POSIX locale model was completely rewritten by
3489 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3490 to compile the POSIX locale definition.
3492 * The former dummy implementations of the strcoll and strxfrm function are
3493 now replaced by fully functional code contributed by Ulrich Drepper. The
3494 collation information comes from the POSIX locale definitions.
3496 * The new header <langinfo.h> defines an interface for accessing
3497 various locale-dependent data (using the locale chosen with `setlocale').
3499 * Ulrich Drepper has contributed a new suite of functions for operation on
3500 wide-character and multibyte-character strings, in <wchar.h>;
3501 and classification and case conversion of wide characters, in <wctype.h>.
3502 These new functions are conforming to the ISO C, Amendement 1 specification.
3504 * There is now a second implementation of the standard I/O library available.
3505 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3506 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3508 * You can now use positional parameter specifications in format strings
3509 for the `printf' and `scanf' families of functions. For example,
3510 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3511 ``Number 6, Mr Jones''. This is mainly useful when providing different
3512 format strings for different languages, whose grammars may dictate
3513 different orderings of the values being printed. To support this
3514 feature, the interface for `register_printf_handler' has changed; see
3515 the header file <printf.h> for details.
3517 * The `printf' and `scanf' families of functions now understand a new
3518 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3519 to group numbers as indicated by the locale; for `scanf' and friends, this
3520 says to accept as valid only a number with all the proper grouping
3521 separators in the right places. In the default "C" locale, numbers are
3522 not grouped; but locales for specific countries will define the usual
3523 conventions (i.e. separate thousands with `,' in the US locale).
3525 * The pgrp functions have been regularized, slightly incompatibly but much
3526 less confusingly. The core functions are now `getpgid' and `setpgid',
3527 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3528 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3529 provided for compatibility. There is no longer an incompatible `getpgrp'
3530 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3532 * The new header file <fts.h> and suite of functions simplify programs that
3533 operate on directory trees. This code comes from 4.4 BSD.
3535 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3536 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3537 NSS scheme used in glibc.
3539 * There is a new malloc debugging hook `__memalign_hook'.
3541 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3542 `unsigned int' in <sys/types.h>. These are for compatibility only and
3543 their use is discouraged.
3545 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3546 done differently, so that it works even without GNU ld.
3548 * New function `euidaccess' checks allowed access to a file like `access',
3549 but using the effective IDs instead of the real IDs.
3551 * The time zone data files have been updated for the latest and greatest
3552 local time conventions of the countries of the world.
3554 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3557 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3558 for formatting floating-point numbers. They are provided only for
3559 compatibility; new programs should use `sprintf' instead. There are
3560 also equivalent function for the `long double' floating-point type and
3561 all functions also exist in a reentrant form.
3563 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3564 functions for maintaining the login-record files (primarily of use to
3565 system programs such as `login'), and convenient functions for
3566 allocating and initializing a pseudo-terminal (pty) device.
3568 * Ulrich Drepper has contributed new support for System V style
3569 shared memory and IPC on systems that support it.
3571 * Ulrich Drepper has contributed several miscellaneous new functions found
3572 in System V: The `hsearch' family of functions provide an effective
3573 implementation of hash tables; `a64l' and `l64a' provide a very simple
3574 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3577 * Ulrich Drepper has contributed new reentrant counterparts for the
3578 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3580 * Ulrich Drepper has contributed new, highly-optimized versions of several
3581 string functions for the i486/Pentium family of processors.
3583 * Ulrich Drepper has updated the Linux-specific code, based largely
3584 on work done in Hongjiu Lu's version of GNU libc for Linux.
3585 The GNU library now supports Linux versions 2.0.10 and later,
3586 using the ELF object file format (i[3456]86-*-linux).
3588 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3590 * David Mosberger-Tang and Richard Henderson have ported the C library
3591 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3592 dynamic linking support for ELF/Alpha.
3594 * Richard Henderson contributed several Alpha optimized assembler function
3595 for arithmetic and string handling.
3597 * Ulrich Drepper has contributed a new set of message catalog functions to
3598 support multiple languages using the <libintl.h> interface, for use with
3599 his new package GNU gettext. Translation volunteers have contributed
3600 catalogs of the library's messages in Spanish, German, and Korean.
3602 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3603 program and the `catgets' function for reading the catalog files it
3604 creates. (The <libintl.h> interface is preferred; we include the
3605 <nl_types.h> interface using `catgets' only for source compatibility with
3606 programs already written to use it.)
3608 * New header file <values.h> gives SVID-compatible names for <limits.h>
3611 * Various new macros, declarations, and small header files for compatibility
3614 * New function `group_member' is a convenient way to check if a process has
3615 a given effective group ID.
3617 * When using GCC 2.7 and later, the socket functions are now declared in a
3618 special way so that passing an argument of type `struct sockaddr_in *',
3619 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3620 `struct sockaddr *' type, does not generate a type-clash warning.
3622 * New function `error' declared in header file <error.h> is a convenient
3623 function for printing error messages and optionally exiting; this is the
3624 canonical function used in GNU programs. The new functions `err', `warn',
3625 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3626 doing the same thing.
3628 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3629 POSIX.2 `glob' function to do ~ and {...} expansion.
3631 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3632 `clearenv' which is used in POSIX.9 is also available.
3634 * New function `getsid' returns session ID number on systems that support it.
3636 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3637 files <db.h> and <mpool.h> provide a rich set of functions for several
3638 types of simple databases stored in memory and in files, and <ndbm.h> is
3639 an old `ndbm'-compatible interface using the `db' functions. Link with
3640 `-ldb' to get these functions.
3642 * New macro `strdupa' copies a string like `strdup', but uses local stack
3643 space from `alloca' instead of dynamic heap space from `malloc'.
3645 * New function `strnlen' is like `strlen' but searches only a given maximum
3646 number of characters for the null terminator. `stpncpy', `strndup' and
3647 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3650 * New function `statfs' in header <sys/statfs.h>.
3652 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3653 provide convenient functions for operating on blocks of null-terminated
3656 * A new suite of functions in <utmp.h> handle all the details of reading
3657 and writing the utmp file.
3659 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3662 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3663 completely POSIX compliant and also implemented the extended functionality
3664 to handle alternate digit representation and alternate era date formats.
3666 * Ulrich Drepper provided an implementation of the `strptime' function
3667 defined in XPG4.2 which transforms a string into a `struct tm' value.
3669 * Paul Eggert provided the tzselect shell script as part of the timezone
3670 code. The shell script makes it easy to select the correct timezone
3673 * The implementation of the malloc family of functions is completely replaced
3674 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3675 The implementation uses the mmap function (if available) and it is
3676 optimized for the use in multi threaded programs.
3678 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3679 functions. This new functionality is usable by specifying a special
3680 salt string and it is compatible with implementation on *BSD systems.
3682 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3683 `getsubopt' to handle second level command line options, `bsd_signal'
3684 to access BSD style `signal' functionality, the obsolete `regexp' style
3687 * the `lchown' function is available on system which support this
3690 * The implementation of the shadow password handling function was contributed
3693 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3695 * POSIX.1g support was added. The <sys/select.h> header is available,
3696 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3697 implementation of `getaddrinfo'.
3701 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3703 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3704 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3706 * The new function `daemon' from 4.4 BSD is useful for server programs that
3707 want to put themselves in the background.
3709 * Joel Sherrill has contributed support for several standalone boards that
3710 run without an operating system.
3712 * `printf', `scanf' and friends now accept a `q' type modifier for long
3713 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3715 * All of the code taken from BSD (notably most of the math and networking
3716 routines) has been updated from the BSD 4.4-Lite release.
3718 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3720 * The new functions `getdomainname' and `setdomainname' fetch or change the
3721 YP/NIS domain name. These are system calls which exist on systems which
3724 * The time zone data files have been updated for the latest international
3727 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3728 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3732 * The C library now includes support for Sun RPC, from Sun's free
3733 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3734 are included. (There is still no support for YP.)
3736 * Tom Quinn has contributed a port of the C library to SGI machines running
3737 Irix 4 (mips-sgi-irix4).
3739 * The new `lockf' function is a simplified interface to the locking
3740 facilities of `fcntl', included for compatibility.
3742 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3744 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3746 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3749 * The error message printed by `assert' for a failed assertion now includes
3750 the name of the program (if using GNU ld) and the name of the calling
3751 function (with versions of GCC that support this).
3753 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3755 * The library now includes the <sys/mman.h> header file and memory
3756 management functions `mmap', `munmap', `mprotect', `msync', and
3757 `madvise', on systems that support those facilities.
3759 * The interface for `mcheck' has changed slightly: the function called to
3760 abort the program when an allocation inconsistency is detected now takes
3761 an argument that indicates the type of failure. The new function
3762 `mprobe' lets you request a consistency check for a particular block at
3763 any time (checks are normally done only when you call `free' or `realloc'
3766 * It is now possible to easily cross-compile the C library, building on one
3767 system a library to run on another machine and/or operating system. All
3768 you need to do is set the variable `HOST_CC' in `configparms' to the
3769 native compiler for programs to run on the machine you are building on (a
3770 few generator programs are used on Unix systems); set `CC' to the
3773 * The new function `fexecve' (only implemented on the GNU system) executes
3774 a program file given a file descriptor already open on the file.
3778 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3779 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3781 * You can set the variable `libprefix' in `configparms' to specify a prefix
3782 to be prepended to installed library files; this makes it easy to install
3783 the GNU C library to be linked as `-lgnuc' or whatever.
3785 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3786 copies a limited number of characters from a string, and returns the
3787 address of the last character written.
3789 * You no longer need to check for whether the installed `stddef.h' is
3790 compatible with the GNU C library. configure now checks for you.
3792 * You can now define a per-stream `fileno' function to convert the
3793 stream's cookie into an integral file descriptor.
3795 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3796 allocates zero bytes of storage, and returns a unique pointer which
3797 you can pass to `realloc' or `free'. The behavior is undefined if
3798 you dereference this pointer.
3800 * The C library now runs on Sony NEWS m68k machines running either
3801 NewsOS 3 or NewsOS 4.
3803 * The new `syscall' function is a system-dependent primitive function
3804 for invoking system calls. It has the canonical behavior on Unix
3805 systems, including unreliable return values for some calls (such as
3806 `pipe', `fork' and `getppid').
3808 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3809 to `EAGAIN', which is the preferred name. On systems whose kernels
3810 use two distinct codes, the C library now translates EWOULDBLOCK to
3811 EAGAIN in every system call function.
3815 * The GNU C Library Reference Manual is now distributed with the library.
3816 `make dvi' will produce a DVI file of the printed manual.
3817 `make info' will produce Info files that you can read on line using C-h i
3818 in Emacs or the `info' program.
3819 Please send comments on the manual to bug-glibc-manual@gnu.org.
3821 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3823 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3825 * Jason Merrill has contributed a port to the Sequent Symmetry running
3826 Dynix version 3 (i386-sequent-dynix).
3828 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3829 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3831 * New function `memory_warnings' lets you arrange to get warnings when
3832 malloc is running out of memory to allocate, like Emacs gives you.
3834 * The C library now contains the relocating allocator used in Emacs 19 for
3835 its editing buffers. This allocator (ralloc) minimizes allocation
3836 overhead and fragmentation by moving allocated regions around whenever it
3837 needs to. You always refer to a ralloc'd region with a "handle" (a
3838 pointer to a pointer--an object of type `void **').
3840 * There is a new `printf' format: `%m' gives you the string corresponding
3841 to the error code in `errno'.
3843 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3844 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3845 pass, the `a' modifier says to fill in a `char **' you pass with a
3848 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3849 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3850 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3852 * `mkstemp' is a traditional Unix function to atomically create and open a
3853 uniquely-named temporary file.
3857 * The standard location for the file that says what the local timezone is
3858 has changed again. It is now `/usr/local/etc/localtime' (or more
3859 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3861 * The distribution no longer contains any files with names longer than 14
3864 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3865 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3867 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3871 * The configuration process has changed quite a bit. The `configure'
3872 script is now used just like the configuration scripts for other GNU
3873 packages. The `sysdeps' directory hierarchy is much rearranged.
3874 The file `INSTALL' explains the new scheme in detail.
3876 * The header files no longer need to be processed into ANSI C and
3877 traditional C versions. There is just one set of files to install, and
3878 it will work with ANSI or old C compilers (including `gcc -traditional').
3880 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3881 MIPS DECStation running Ultrix 4.
3883 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3884 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3885 made itself into a shared library.
3887 * Yet further improved support for the i386, running 4.3 BSD-like systems
3888 (such as Mach 3 with the Unix single-server), or System V.
3890 * New function `strncasecmp' to do case-insensitive string comparison
3891 with limited length.
3893 * New function `strsep' is a reentrant alternative to `strtok'.
3895 * New functions `scandir' and `alphasort' for searching directories.
3897 * New function `setenv' is a better interface to `putenv'.
3899 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3900 function for traversing a directory tree.
3902 * The GNU obstack package is now also part of the C library.
3903 The new function `open_obstack_stream' creates a stdio stream that
3904 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3905 formatted output directly to an obstack.
3907 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3908 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3910 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3912 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3913 things to your strings.
3915 * There are some new test programs: test-fseek, testmb, and testrand.
3917 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3918 These ports are not finished, but are a good starting place for really
3919 supporting those systems.
3921 * `/etc/localtime' is now the standard location for the file that says what
3922 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3923 This follows the general principle that `/etc' is the place for all local
3924 configuration files.
3926 * The C library header files now use `extern "C"' when used by the C++
3927 compiler, so the C library should now work with C++ code.
3929 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3930 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3933 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3934 function which uses the `merge sort' algorithm, and is said to be
3935 significantly faster than the old GNU `qsort' function. Merge sort is
3936 now the standard `qsort' function. The new algorithm can require a lot
3937 of temporary storage; so, the old sorting function is called when the
3938 required storage is not available.
3940 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3941 provides the Unix `crypt' function, plus some other entry points.
3943 * The code and header files taken from 4.4 BSD have been updated with the
3944 latest files released from Berkeley.
3946 ----------------------------------------------------------------------
3947 Copyright information:
3949 Copyright (C) 1992-2017 Free Software Foundation, Inc.
3951 Permission is granted to anyone to make or distribute verbatim copies
3952 of this document as received, in any medium, provided that the
3953 copyright notice and this permission notice are preserved,
3954 thus giving the recipient permission to redistribute in turn.
3956 Permission is granted to distribute modified versions
3957 of this document, or of portions of it,
3958 under the above conditions, provided also that they
3959 carry prominent notices stating who last changed them.
3962 version-control: never