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 <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * The GNU C Library can now be compiled with support for building static
13 PIE executables (See --enable-static-pie in INSTALL). These static PIE
14 exectuables are like static executables but can be loaded at any address
15 and provide additional security hardening benefits at the cost of some
16 memory and performance. When the library is built with --enable-static-pie
17 the resulting libc.a is usable with GCC 8 and above to create static PIE
18 executables using the GCC option '-static-pie'. This feature is currently
19 supported on i386, x86_64, x32 and aarch64.
21 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
22 sinf and tan with FMA, contributed by Arjan van de Ven and H.J. Lu
25 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
27 * Optimized generic expf, exp2f, logf, log2f, powf and sinf.
29 * In order to support faster and safer process termination the malloc API
30 family of functions will no longer print a failure address and stack
31 backtrace after detecting heap corruption. The goal is to minimize the
32 amount of work done after corruption is detected and to avoid potential
33 security issues in continued process execution. Reducing shutdown time
34 leads to lower overall process restart latency, so there is benefit both
35 from a security and performance perspective.
37 * The abort function terminates the process immediately, without flushing
38 stdio streams. Previous glibc versions used to flush streams, resulting
39 in deadlocks and further data corruption. This change also affects
40 process aborts as the result of assertion failures.
42 * On platforms where long double has the IEEE binary128 format (aarch64,
43 alpha, mips64, s390 and sparc), the math library now implements _Float128
44 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015. These
45 are the same interfaces added in version 2.26 for some platforms where
46 this format is supported but is not the format of long double.
48 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
49 mips64, powerpc64le, s390, sparc and x86_64), the math library now
50 implements interfaces for that type, as defined by ISO/IEC TS
51 18661-3:2015. These are corresponding interfaces to those supported for
54 * The math library now implements interfaces for the _Float32, _Float64 and
55 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
56 corresponding interfaces to those supported for _Float128.
58 * glibc now implements the memfd_create and mlock2 functions on Linux.
60 * Support for memory protection keys was added. The <sys/mman.h> header now
61 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
64 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
66 * The ldconfig utility now processes `include' directives using the C/POSIX
67 collation ordering. Previous glibc versions used locale-specific
68 ordering, the change might break systems that relied on that.
70 Deprecated and removed features, and other changes affecting compatibility:
72 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
73 defined by <sys/ptrace.h>.
75 * libm no longer supports SVID error handling (calling a user-provided
76 matherr function on error) or the _LIB_VERSION variable to control error
77 handling. (SVID error handling and the _LIB_VERSION variable still work
78 for binaries linked against older versions of the GNU C Library.) The
79 libieee.a library is no longer provided. math.h no longer defines struct
80 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
81 TLOSS, PLOSS and HUGE.
83 * The libm functions pow10, pow10f and pow10l are no longer supported for
84 new programs. Programs should use the standard names exp10, exp10f and
85 exp10l for these functions instead.
87 * The mcontext_t type is no longer the same as struct sigcontext. On
88 platforms where it was previously the same, this changes the C++ name
89 mangling for interfaces involving this type.
91 * The add-ons mechanism for building additional packages at the same time as
92 glibc has been removed. The --enable-add-ons configure option is now
95 * The --without-fp configure option is now ignored. Whether hardware
96 floating-point instructions are used is now configured based on whether
97 the compiler used at configure time (without any options implied by a
98 --with-cpu= configure option) uses such instructions.
100 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
101 the specified string can be parsed as a domain name.
103 * In the malloc_info output, the <heap> element may contain another <aspace>
104 element, "subheaps", which contains the number of sub-heaps.
106 * The libresolv function p_secstodate is no longer supported for new
109 Changes to build and runtime requirements:
111 * bison version 2.7 or later is required to generate code in the 'intl'
114 Security related changes:
116 CVE-2009-5064: The ldd script would sometimes run the program under
117 examination directly, without preventing code execution through the
118 dynamic linker. (The glibc project disputes that this is a security
119 vulnerability; only trusted binaries must be examined using the ldd
122 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
123 suffered from a one-byte overflow during ~ operator processing (either
124 on the stack or the heap, depending on the length of the user name).
125 Reported by Tim Rühsen.
127 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
128 would sometimes fail to free memory allocated during ~ operator
129 processing, leading to a memory leak and, potentially, to a denial
132 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
133 without GLOB_NOESCAPE, could write past the end of a buffer while
134 unescaping user names. Reported by Tim Rühsen.
136 CVE-2017-17426: The malloc function, when called with an object size near
137 the value SIZE_MAX, would return a pointer to a buffer which is too small,
138 instead of NULL. This was a regression introduced with the new malloc
139 thread cache in glibc 2.26. Reported by Iain Buclaw.
141 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
142 to the allocation of too much memory. (This is not a security bug per se,
143 it is mentioned here only because of the CVE assignment.) Reported by
146 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
147 of the number of search path components. (This is not a security
148 vulnerability per se because no trust boundary is crossed if the fix for
149 CVE-2017-1000366 has been applied, but it is mentioned here only because
150 of the CVE assignment.) Reported by Qualys.
152 The following bugs are resolved with this release:
154 [The release manager will add the list generated by
155 scripts/list-fixed-bugs.py just before the release.]
162 * A per-thread cache has been added to malloc. Access to the cache requires
163 no locks and therefore significantly accelerates the fast path to allocate
164 and free small amounts of memory. Refilling an empty cache requires locking
165 the underlying arena. Performance measurements show significant gains in a
166 wide variety of user workloads. Workloads were captured using a special
167 instrumented malloc and analyzed with a malloc simulator. Contributed by
168 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
170 * Unicode 10.0.0 Support: Character encoding, character type info, and
171 transliteration tables are all updated to Unicode 10.0.0, using
172 generator scripts contributed by Mike FABIAN (Red Hat).
173 These updates cause user visible changes, especially the changes in
174 wcwidth for many emoji characters cause problems when emoji sequences
175 are rendered with pango, see for example:
176 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
178 * Collation of Hungarian has been overhauled and is now consistent with "The
179 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
182 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
184 - The GNU C Library will now detect when /etc/resolv.conf has been
185 modified and reload the changed configuration. The new resolver option
186 “no-reload” (RES_NORELOAD) disables this behavior.
188 - The GNU C Library now supports an arbitrary number of search domains
189 (configured using the “search” directive in /etc/resolv.conf);
190 previously, there was a hard limit of six domains. For backward
191 compatibility, applications that directly modify the ‘_res’ global
192 object are still limited to six search domains.
194 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
195 Library will now randomly pick a name server from the configuration as a
196 starting point. (Previously, the second name server was always used.)
198 * The tunables feature is now enabled by default. This allows users to tweak
199 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
201 * New function reallocarray, which resizes an allocated block (like realloc)
202 to the product of two sizes, with a guaranteed clean failure upon integer
203 overflow in the multiplication. Originally from OpenBSD, contributed by
204 Dennis Wölfing and Rüdiger Sonderfeld.
206 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
207 These are extended versions of preadv and pwritev, respectively, taking an
208 additional flags argument. The set of supported flags depends on the
209 running kernel; full support currently requires kernel 4.7 or later.
211 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
212 create a new session ID for the spawned process. This feature is
213 scheduled to be added to the next major revision of POSIX; for the time
214 being, it is available under _GNU_SOURCE.
216 * errno.h is now safe to use from C-preprocessed assembly language on all
217 supported operating systems. In this context, it will only define the
218 Exxxx constants, as preprocessor macros expanding to integer literals.
220 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
221 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
222 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
223 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
225 To compile programs that use this feature, the compiler must support
226 128-bit floating point with the type name _Float128 (as defined by TS
227 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
228 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
229 must be defined to make the new interfaces visible.
231 The new functions and macros correspond to those present for other
232 floating-point types (except for a few obsolescent interfaces not
233 supported for the new type), with F128 or f128 suffixes; for example,
234 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
235 printf or scanf formats for the new type; the strfromf128 and strtof128
236 interfaces should be used instead.
238 Deprecated and removed features, and other changes affecting compatibility:
240 * The synchronization that pthread_spin_unlock performs has been changed to
241 now be equivalent to a C11 atomic store with release memory order to the
242 spin lock's memory location. Previously, several (but not all)
243 architectures used stronger synchronization (e.g., containing what is
244 often called a full barrier). This change can improve performance, but
245 may affect odd fringe uses of spin locks that depend on the previous
246 behavior (e.g., using spin locks as atomic variables to try to implement
247 Dekker's mutual exclusion algorithm).
249 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
252 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
253 will only be built and installed when the GNU C Library is configured with
254 --enable-obsolete-rpc. This allows alternative RPC implementations, such
255 as TIRPC or rpcsvc-proto, to be used.
257 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
258 libnss_compat, are deprecated, and will not be built or installed by
261 The NIS(+) support library, libnsl, is also deprecated. By default, a
262 compatibility shared library will be built and installed, but not headers
263 or development libraries. Only a few NIS-related programs require this
264 library. (In particular, the GNU C Library has never required programs
265 that use 'gethostbyname' to be linked with libnsl.)
267 Replacement implementations based on TIRPC, which additionally support
268 IPv6, are available from <https://github.com/thkukuk/>. The configure
269 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
270 name service modules, to be built and installed.
272 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
273 support is enabled, the configured recursive resolver must support EDNS.
274 (Responding to EDNS-enabled queries with responses which are not
275 EDNS-enabled is fine, but FORMERR responses are not.)
277 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
278 servers have not supported this opcode for a long time.
280 * The _res_opcodes variable has been removed from libresolv. It had been
281 exported by accident.
283 * <string.h> no longer includes inline versions of any string functions,
284 as this kind of optimization is better done by the compiler. The macros
285 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
287 * The nonstandard header <xlocale.h> has been removed. Most programs should
288 use <locale.h> instead. If you have a specific need for the definition of
289 locale_t with no other declarations, please contact
290 libc-alpha@sourceware.org and explain.
292 * The obsolete header <sys/ultrasound.h> has been removed.
294 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
296 * The obsolete function cfree has been removed. Applications should use
299 * The stack_t type no longer has the name struct sigaltstack. This changes
300 the C++ name mangling for interfaces involving this type.
302 * The ucontext_t type no longer has the name struct ucontext. This changes
303 the C++ name mangling for interfaces involving this type.
305 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
306 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
307 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
308 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
309 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
310 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
311 fpregset_t type no longer has the name struct fpu. This changes the C++
312 name mangling for interfaces involving those types.
314 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
315 synced with the kernel:
317 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
318 are not supported on this architecture and have been removed.
320 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
321 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
322 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
324 Programs that assume the GET/SETREGS ptrace requests are universally
325 available will now fail to build, instead of malfunctioning at runtime.
327 Changes to build and runtime requirements:
329 * Linux kernel 3.2 or later is required at runtime, on all architectures
330 supported by that kernel. (This is a change from version 2.25 only for
333 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
335 * On most architectures, GCC 4.9 or later is required to build the GNU C
336 Library. On powerpc64le, GCC 6.2 or later is required.
338 Older GCC versions and non-GNU compilers are still supported when
339 compiling programs that use the GNU C Library. (We do not know exactly
340 how old, and some GNU extensions to C may be _de facto_ required. If you
341 are interested in helping us make this statement less vague, please
342 contact libc-alpha@sourceware.org.)
344 Security related changes:
346 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
347 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
349 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
350 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
352 * Avoid printing a backtrace from the __stack_chk_fail function since it is
353 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
356 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
357 fixed (CVE-2017-12133).
359 The following bugs are resolved with this release:
361 [984] network: Respond to changed resolv.conf in gethostbyname
362 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
363 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
365 [12189] libc: __stack_chk_fail should not attempt a backtrace
367 [14096] time: Race condition on timezone/tst-timezone.out
368 [14172] localedata: az_IR: new locale
369 [14995] build: glibc fails to build if gold is the default linker, even if
371 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
372 [16637] network: inet_pton function is accepting IPv6 with bad format
373 [16640] string: string/strtok.c: undefined behaviour inconsistent between
374 x86 and other generic code
375 [16875] localedata: ko_KR: fix lang_name
376 [17225] localedata: ar_SY: localized month names for May and June are
378 [17297] localedata: da_DK: wrong date_fmt string
379 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
380 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
381 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
382 [19066] localedata: ar_SA abbreviated day and month names are in English
383 [19569] network: resolv: Support an arbitrary number of search domains
384 [19570] network: Implement random DNS server selection in the stub
386 [19838] locale: localedef fails on PA-RISC
387 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
388 order of 0D36 and 0D37
389 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
391 [20098] libc: FAIL: debug/backtrace-tst on hppa
392 [20257] network: sunrpc: clntudp_call does not enforce timeout when
394 [20275] localedata: locale day/abday/mon/abmon should not have trailing
396 [20313] localedata: Update locale data to Unicode 9.0
397 [20424] manual: Document how to provide a malloc replacement
398 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
400 [20686] locale: Add el_GR@euro to SUPPORTED.
401 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
402 failures consistently
403 [21015] dynamic-link: Document and fix --enable-bind-now
404 [21016] nptl: pthread_cond support is broken on hppa
405 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
406 frame-pointer on i386
407 [21049] libc: segfault in longjmp_chk() due to clobbered processor
409 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
410 [21088] libc: Build fails with --enable-static-nss
411 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
412 generic c code is used
413 [21109] libc: Tunables broken on big-endian
414 [21112] math: powf has large ulp errors with base close to 1 and exponent
416 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
418 [21120] malloc: glibc malloc is incompatible with GCC 7
419 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
421 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
422 (-0.0) when linking with -lieee
423 [21171] math: log10, log2 and lgamma return incorrect results
424 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
425 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
426 [21207] localedata: ce_RU: update weekdays from CLDR
427 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
428 [21217] localedata: Update months from CLDR-31
429 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
430 [21243] libc: support_delete_temp_file should issue warning for failed
432 [21244] libc: support resolv_test_start() socket fd close should be
434 [21253] libc: localedef randomly segfaults when using -fstack-check due to
435 new posix_spawn implementation
436 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
437 leads to lower CPU frequency
438 [21259] libc: [alpha] termios.h missing IXANY for POSIX
439 [21261] libc: [sparc64] bits/setjmp.h namespace
440 [21267] network: [mips] bits/socket.h IOC* namespace
441 [21268] libc: [alpha] termios.h NL2, NL3 namespace
442 [21270] libc: mmap64 silently truncates large offset values
443 [21275] libc: posix_spawn always crashes on ia64 now
444 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
445 [21280] math: [powerpc] logbl for POWER7 return incorrect results
446 [21289] libc: Incorrect declaration for 32-bit platforms with
447 _FILE_OFFSET_BITS=64 causes build error
448 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
449 not support gethostbyname4_r
450 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
452 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
454 [21340] libc: Support POSIX_SPAWN_SETSID
455 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
456 [21359] network: ns_name_pack needs additional byte in destination buffer
457 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
458 against fragmentation attacks (CVE-2017-12132)
459 [21369] network: resolv: Remove EDNS fallback
460 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
462 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
463 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
464 [21393] stdio: Missing dup3 error check in freopen, freopen64
465 [21396] libc: Use AVX2 memcpy/memset on Skylake server
466 [21399] localedata: Bad description for U00EC in
467 localedata/charmaps/CP1254
468 [21411] malloc: realloc documentation error
469 [21426] network: sys/socket.h uio.h namespace
470 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
471 [21445] libc: signal.h bsd_signal namespace
472 [21455] network: Network headers stdint.h namespace
473 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
475 [21475] network: resolv: Overlong search path is truncated mid-label
476 [21511] libc: sigstack namespace
477 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
478 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
479 bits/syscall.h: No such file or directory
480 [21517] libc: struct sigaltstack namespace
481 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
482 [21533] localedata: Update locale data to Unicode 10.0
484 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
485 junk at end of line, first unrecognized character is `@'
486 [21538] libc: SIG_HOLD missing for XPG4
487 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
488 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
489 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
490 [21543] libc: sigevent namespace
491 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
492 size for general purpose registers in mcontext_t structure
493 [21550] libc: sigwait namespace
494 [21552] libc: XPG4 bsd_signal namespace
495 [21554] libc: sigpause namespace
496 [21560] libc: sys/wait.h signal.h namespace
497 [21561] libc: waitid namespace
498 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
499 '/usr/include/stdlib.h': Permission denied
500 [21575] libc: sys/wait.h missing struct rusage definition
501 [21584] libc: sigaltstack etc namespace
502 [21597] libc: siginterrupt namespace
503 [21607] math: hppa: FAIL: math/test-tgmath
504 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
506 [21622] libc: [tile] missing SA_* for POSIX.1:2008
507 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
508 stack and heap (CVE-2017-1000366)
509 [21625] libc: wait3 namespace
510 [21654] nss: Incorrect pointer alignment in NSS group merge result
512 [21657] network: Parse interface zone id for node-local multicast
513 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
515 [21666] libc: .symver is used on common symbol
516 [21668] network: resolv: res_init cross-thread broadcast introduces race
518 [21687] math: tgmath.h totalorder, totalordermag return type
519 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
521 [21696] libc: Incorrect assumption of of __cpu_mask in
522 posix/sched_cpucount.c
523 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
524 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
526 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
527 leading to relocation crash
528 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
529 `resolv_conf_matches (resp, conf)' failed.
530 [21710] localedata: Added Samoan language locale for Samoa
531 [21711] localedata: Pashto yesstr/nostr locale are missing
532 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
533 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
534 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
535 [21723] localedata: yesstr/nostr missing for Chinese language locale
536 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
538 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
540 [21728] localedata: New Locale for Tongan language
541 [21729] localedata: incorrect LC_NAME fields for hi_IN
542 [21733] localedata: yesstr and nostr are missing for zh_HK
543 [21734] localedata: Missing yesstr and nostr are for kw_GB
544 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
545 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
546 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
547 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
549 [21744] libc: Tests failing on --enable-tunables --enable-stack-
551 [21749] localedata: Wrong abbreviated day name (“abday”) for
553 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
554 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
555 [21759] localedata: missing yesstr and nostr for Tigrinya
556 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
557 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
558 [21767] localedata: Missing Bislama locales
559 [21768] localedata: Missing yesstr and nostr for aa_ET
560 [21770] localedata: Missing Field in li_NL
561 [21778] nptl: Robust mutex may deadlock
562 [21779] libc: MicroBlaze segfaults when loading libpthread
563 [21783] localedata: Fix int_select international_call_prefixes
564 [21784] localedata: Inconsistency in country_isbn
565 [21788] localedata: Missing Country Postal Abbreviations
566 [21794] localedata: Added-country_isbn-for-Italy
567 [21795] localedata: Add/Fix country_isbn for France
568 [21796] localedata: Added country_isbn for Republic of Korea
569 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
570 [21799] localedata: Added int_select international_call_prefixes
571 [21801] localedata: Added int_select international_call_prefixes
572 [21804] nptl: Double semicolon in thread-shared-types.h
573 [21807] localedata: LC_ADDRESS fix for pap_CW
574 [21808] localedata: Fix LC_ADDRESS for pap_AW
575 [21821] localedata: Added country_name in mai_IN
576 [21822] localedata: Fix LC_TIME for mai_IN
577 [21823] localedata: missing yesstr, nostr for sa_IN
578 [21825] localedata: Fix name_mrs for mag_IN
579 [21828] localedata: 2.26 changelog should mention user visible changes
581 [21835] localedata: Added Maithili language locale for Nepal
582 [21838] localedata: Removed redundant data for the_NP
583 [21839] localedata: Fix LC_MONETARY for ta_LK
584 [21844] localedata: Fix Latin characters and Months Sequence.
585 [21848] localedata: Fix mai_NP Title Name
590 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
591 24731-2:2010, is supported to enable declarations of functions from that
592 TR. Note that not all functions from that TR are supported by the GNU C
595 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
596 18661-1:2014, is supported to enable declarations of functions and macros
597 from that TS. Note that not all features from that TS are supported by
600 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
601 18661-4:2015, is supported to enable declarations of functions and macros
602 from that TS. Note that most features from that TS are not supported by
605 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
606 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
607 Since the GNU C Library defaults to a much newer revision of POSIX, this
608 will only affect programs that specifically request an old conformance
609 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
610 see a change in the visible declarations, but a program compiled with
611 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
614 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
615 defined by all multithreaded code, but glibc has not required this for
618 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
619 means that in a future release, the macros “major”, “minor”, and “makedev”
620 will only be available from <sys/sysmacros.h>.
622 These macros are not part of POSIX nor XSI, and their names frequently
623 collide with user code; see for instance glibc bug 19239 and Red Hat bug
624 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
625 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
628 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
629 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
630 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
632 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
633 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
634 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
635 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
636 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
637 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
638 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
639 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
640 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
641 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
642 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
645 * New <math.h> features are added from TS 18661-1:2014:
647 - Signaling NaN macros: SNANF, SNAN, SNANL.
649 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
650 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
651 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
653 - llogb functions: the llogb, llogbf and llogbl functions, and the
654 FP_LLOGB0 and FP_LLOGBNAN macros.
656 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
659 - Comparison macros: iseqsig.
661 - Classification macros: iscanonical, issubnormal, iszero.
663 - Total order functions: totalorder, totalorderf, totalorderl,
664 totalordermag, totalordermagf, totalordermagl.
666 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
668 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
669 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
671 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
672 are added to libc. They convert a floating-point number into string.
674 * Most of glibc can now be built with the stack smashing protector enabled.
675 It is recommended to build glibc with --enable-stack-protector=strong.
676 Implemented by Nick Alcock (Oracle).
678 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
679 intended to be used instead of memset() to erase sensitive data after use;
680 the compiler will not optimize out calls to explicit_bzero even if they
681 are "unnecessary" (in the sense that no _correct_ program can observe the
682 effects of the memory clear).
684 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
685 to float instead of double. This does not affect the ABI of any libraries
686 that are part of the GNU C Library, but may affect the ABI of other
687 libraries that use this type in their interfaces.
689 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
690 float_t and double_t types are now defined to long double instead of float
691 and double. These options are not the default, and this does not affect
692 the ABI of any libraries that are part of the GNU C Library, but it may
693 affect the ABI of other libraries that use this type in their interfaces,
694 if they are compiled or used with those options.
696 * The getentropy and getrandom functions, and the <sys/random.h> header file
699 * The buffer size for byte-oriented stdio streams is now limited to 8192
700 bytes by default. Previously, on Linux, the default buffer size on most
701 file systems was 4096 bytes (and thus remains unchanged), except on
702 network file systems, where the buffer size was unpredictable and could be
703 as large as several megabytes.
705 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
706 for the Linux quota interface which predates kernel version 2.4.22 has
709 * The malloc_get_state and malloc_set_state functions have been removed.
710 Already-existing binaries that dynamically link to these functions will
711 get a hidden implementation in which malloc_get_state is a stub. As far
712 as we know, these functions are used only by GNU Emacs and this change
713 will not adversely affect already-built Emacs executables. Any undumped
714 Emacs executables, which normally exist only during an Emacs build, should
715 be rebuilt by re-running “./configure; make” in the Emacs build tree.
717 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
718 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
719 “no-ip6-dotint” had already been the default, and support for the
720 “ip6-dotint” option was removed from the Internet in 2006.
722 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
723 flag from <resolv.h> have been removed. The option relied on a
724 backwards-incompatible DNS extension which was never deployed on the
727 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
728 RES_BLAST defined in the <resolv.h> header file have been deprecated.
729 They were already unimplemented.
731 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
732 _res.flags are deprecated. The flag was standardized in RFC 2133, but
733 removed again from the IETF name lookup interface specification in RFC
734 2553. Applications should use getaddrinfo instead.
736 * DNSSEC-related declarations and definitions have been removed from the
737 <arpa/nameser.h> header file, and libresolv will no longer attempt to
738 decode the data part of DNSSEC record types. Previous versions of glibc
739 only implemented minimal support for the previous version of DNSSEC, which
740 is incompatible with the currently deployed version.
742 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
743 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
744 <arpa/nameser.h> header file because the distinction between RR types and
745 meta-RR types is not officially standardized, subject to revision, and
746 thus not suitable for encoding in a macro.
748 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
749 and rhook members of the res_state type in <resolv.h> have been removed.
750 The glibc stub resolver did not support these hooks, but the header file
751 did not reflect that.
753 * For multi-arch support it is recommended to use a GCC which has
754 been built with support for GNU indirect functions. This ensures
755 that correct debugging information is generated for functions
756 selected by IFUNC resolvers. This support can either be enabled by
757 configuring GCC with '--enable-gnu-indirect-function', or by
758 enabling it by default by setting 'default_gnu_indirect_function'
759 variable for a particular architecture in the GCC source file
762 * GDB pretty printers have been added for mutex and condition variable
763 structures in POSIX Threads. When installed and loaded in gdb these pretty
764 printers show various pthread variables in human-readable form when read
765 using the 'print' or 'display' commands in gdb.
767 * Tunables feature added to allow tweaking of the runtime for an application
768 program. This feature can be enabled with the '--enable-tunables' configure
769 flag. The GNU C Library manual has details on usage and README.tunables has
770 instructions on adding new tunables to the library.
772 * A new version of condition variables functions have been implemented in
773 the NPTL implementation of POSIX Threads to provide stronger ordering
776 * A new version of pthread_rwlock functions have been implemented to use a more
777 scalable algorithm primarily through not using a critical section anymore to
780 Security related changes:
782 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
783 have been created with makecontext could fail to terminate due to a
784 missing .cantunwind annotation. This has been observed to lead to a hang
785 (denial of service) in some Go applications compiled with gccgo. Reported
786 by Andreas Schwab. (CVE-2016-6323)
788 * The DNS stub resolver functions would crash due to a NULL pointer
789 dereference when processing a query with a valid DNS question type which
790 was used internally in the implementation. The stub resolver now uses a
791 question type which is outside the range of valid question type values.
794 The following bugs are resolved with this release:
796 [4099] stdio: Overly agressive caching by stream i/o functions.
797 [7065] build: Support building glibc with -fstack-protector or -fstack-
799 [9842] localedata: en_CA: incorrect date format
800 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
801 before it started waiting
802 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
803 [15765] nptl: sem_open is wrongly a cancellation point
804 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
805 [16458] libc: endian.h and netinet/in.h byte order macros return values of
807 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
808 library linked with pthread
809 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
811 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
812 [17252] libc: getrandom and getentropy syscall
813 [17730] malloc: thread-local storage is sometimes improperly free()'d
814 after being __libc_memalign()'d
815 [18241] stdio: failed fseek on memstream does not set errno and can fail
817 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
819 [18463] nptl: pthread_cond_broadcast issue when surrounded by
820 PTHREAD_PRIO_INHERIT mutex on ARM
821 [18784] network: res_query and related function crash for special record
822 type queries (CVE-2015-5180)
823 [19380] math: strtod does not raise "inexact"
824 [19387] string: Integer overflow in memchr
825 [19390] string: Integer overflow in strncat
826 [19398] build: linknamespace tests fail with massively parallel build
827 [19402] nptl: Deadlock with robust shared mutex and asynchronous
829 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
830 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
831 [19514] libc: [PATCH] Fix spelling errors in spelling
832 "implement"/"implementation" in several places
833 [19582] network: Deprecate RES_USE_INET6
834 [19673] manual: clog10 docs appear to be erroneous
835 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
836 causes a segmentation fault
837 [19826] libc: invalid pointer returned from __tls_get_addr with static
839 [20016] network: resolv: Remove hooks support from the API
840 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
842 [20033] math: [x86_64] vectorized math function don't call the __finite
844 [20116] nptl: use after free in pthread_create
845 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
846 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
848 [20311] nptl: please install proc_service.h
849 [20366] libc: Compilation errors in installed headers in strict-compliance
851 [20370] malloc: malloc: Arena free list management is still racy
852 (incorrect fix in bug 19243)
853 [20386] libc: assert (X = 0) does not result in GCC warning
854 [20432] malloc: malloc: Minimize interface required for interposition
855 [20435] libc: Missing unwind info in __startcontext causes infinite loop
856 in _Unwind_Backtrace (CVE-2016-6323)
857 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
858 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
860 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
861 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
862 [20477] network: resolv: incorrect double-checked locking related to
864 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
866 [20495] math: x86_64 performance degradation due to AVX/SSE transition
868 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
869 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
870 cause transition penalty
871 [20517] math: sparcv9 missing fdiml compat symbol
872 [20524] manual: strverscmp is inconsistent
873 [20525] libc: <sys/quota.h> should be based on kernel headers
874 [20539] math: GCC 7 -static -lm fails to link at -O3
875 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
877 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
879 [20591] network: Remove obsolete DNSSEC support
880 [20592] network: DNS resource record type classification macros in
881 <arpa/nameser.h> are incorrect
882 [20593] network: Update DNS RR type definitions
883 [20611] network: getaddrinfo accepts invalid numeric scope IDs
884 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
886 [20629] network: libresolv: Remove support for bitstring labels
888 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
889 assertion: "maxidx >= 2"
890 [20660] math: [arm] Use VSQRT
891 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
892 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
893 [20689] libc: Test for FMA should also check for AVX.
894 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
895 [20715] math: iszero macro breaks existing code
896 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
897 [20728] libc: powerpc: Missing TOC stub in clone
898 [20729] build: glibc-2.24 fails to build for i486 with -Os
899 [20750] build: Build fails with default PIE enabled gcc-6.x
900 [20768] math: [alpha] sqrt fegetenv namespace
901 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
903 [20787] math: float_t is defined as float incorrectly on x86_64 even if
904 __FLT_EVAL_METHOD__ is 2
905 [20790] network: rpcgen buffer overrun in get_prog_declaration
906 [20822] nptl: race condition in __lll_unlock_elision on powerpc
907 [20829] libc: crypt snprintf namespace
908 [20847] libc: tst-vfork3 failure
909 [20855] math: Default bits/mathdef.h has inappropriate float_t
910 [20859] math: [sh4] FP_ILOGB0 invalid
911 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
912 U+20AC), not same as GBK
913 [20915] dynamic-link: global-dynamic TLS broken on aarch64
914 [20916] math: pow handling of sNaN arguments
915 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
916 [20919] math: Bad pow (qNaN, 0) result with -lieee
917 [20940] math: hypot sNaN handling
918 [20947] math: fmax, fmin sNaN handling
919 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
920 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
922 [20971] string: powerpc64/power7 memchr overflows internal pointer check
923 [20973] nptl: robust mutexes: Lost wake-ups
924 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
925 [20978] nis: strlen on null pointer in nss_nisplus
926 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
928 [21014] string: i686 memchr overflows internal pointer check
929 [21019] libc: [mips] n32 lseek incorrect on overflow
930 [21022] libc: [microblaze] __backtrace get_frame_size namespace
931 [21026] libc: [MIPS] readahead syscall is broken on n64
932 [21028] math: Fallback fesetexceptflag should always succeed
933 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
934 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
936 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
937 [21061] librt: [microblaze] librt lost clock_* exports
938 [21073] libc: tunables: insecure environment variables passed to
939 subprocesses with AT_SECURE
940 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
944 * The minimum Linux kernel version that this version of the GNU C Library
945 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
946 kernel version 2.6.32 or later suffices (on architectures that already
947 required kernel versions more recent than 3.2, those requirements remain
948 unchanged). Linux 3.2 or later kernel headers are required on all
951 * The pap_AN locale has been deleted. This has been deprecated for a long
952 time. It has been replaced by pap_AW & pap_CW, both of which have long
953 been included in previous releases.
955 * The readdir_r and readdir64_r functions have been deprecated. It is
956 recommended to use readdir and readdir64 instead.
958 * The type “union wait” has been removed. It was deprecated in the early
959 1990s and never part of POSIX. Application code should use the int type
960 instead of “union wait”.
962 * A new NSS action is added to facilitate large distributed system
963 administration. The action, MERGE, allows remote user stores like LDAP
964 to be merged into local user stores like /etc/groups in order to provide
965 easy to use, updated, and managed sets of merged credentials. The new
966 action can be used by configuring it in /etc/nsswitch.conf:
967 group: files [SUCCESS=merge] nis
968 Implemented by Stephen Gallagher (Red Hat).
970 * The deprecated __malloc_initialize_hook variable has been removed from the
973 * The long unused localedef --old-style option has been removed. It hasn't
974 done anything in over 16 years. Scripts using this option can safely
977 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
978 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
979 return the next representable value in the direction of positive infinity
980 and the nextdown functions return the next representable value in the
981 direction of negative infinity. These are currently enabled as GNU
984 Security related changes:
986 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
987 could result in a stack overflow when getnetbyname was called with an
988 overly long name. (CVE-2016-3075)
990 * Previously, getaddrinfo copied large amounts of address data to the stack,
991 even after the fix for CVE-2013-4458 has been applied, potentially
992 resulting in a stack overflow. getaddrinfo now uses a heap allocation
993 instead. Reported by Michael Petlan. (CVE-2016-3706)
995 * The glob function suffered from a stack-based buffer overflow when it was
996 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
997 Reported by Alexander Cherepanov. (CVE-2016-1234)
999 * The Sun RPC UDP client could exhaust all available stack space when
1000 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
1001 alloca plugin for GCC. (CVE-2016-4429)
1003 * The IPv6 name server management code in libresolv could result in a memory
1004 leak for each thread which is created, performs a failing naming lookup,
1005 and exits. Over time, this could result in a denial of service due to
1006 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
1008 The following bugs are resolved with this release:
1010 [1170] localedata: ne_NP: update Nepali locale definition file
1011 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
1013 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
1014 [6796] math: fdim() does not set errno on overflow
1015 [10354] libc: posix_spawn should use vfork() in more cases than presently
1016 [11213] localedata: localedata: add copyright disclaimer to locale files
1017 [12143] localedata: chr_US: new Cherokee locale
1018 [12450] localedata: sgs_LT: new locale
1019 [12676] localedata: ln_CD: new locale
1020 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
1022 [13304] math: fma, fmaf, fmal produce wrong results
1023 [14259] build: --localedir arg to configure is ignored
1024 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
1025 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
1026 [14934] localedata: es_CL: wrong first weekday chilean locale
1027 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
1029 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
1031 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
1032 [15368] nptl: raise() is not async-signal-safe
1033 [15479] math: ceil, floor, round and trunc raise inexact exception
1034 [15578] localedata: kk_KZ: various updates
1035 [16003] localedata: pap_AN: punt old locale
1036 [16137] localedata: iw_IL: punt old locale
1037 [16190] localedata: eo: new esperanto locale
1038 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
1039 [16742] malloc: race condition: pthread_atfork() called before first
1040 malloc() results in unexpected locking behaviour/deadlocks
1041 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
1043 [16983] localedata: postal_fmt does not allow %l and %n modifiers
1044 [17565] localedata: pt_PT: wrong (work-)week start
1045 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
1046 [17950] build: Build fails with -msse
1047 [18205] localedata: be_BY*: wrong first_weekday and first_workday
1048 [18433] libc: posix_spawn does not return correctly upon failure to
1050 [18453] localedata: charmaps/IBM875: incorrect codes
1051 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
1053 [18896] localedata: he_IL: improvements for currency
1054 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
1055 Romanian locale data
1056 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
1058 [19056] libc: Deprecate readdir_r
1059 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
1061 [19198] localedata: nl_NL: small improvements for Dutch locales
1062 [19257] network: Per-thread memory leak in __res_vinit with IPv6
1063 nameservers (CVE-2016-5417)
1064 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
1066 [19400] locale: Language missing in "iso-639.def", trivial fix in
1068 [19431] malloc: Deadlock between fflush, getdelim, and fork
1069 [19505] libc: Incorrect file descriptor validity checks in
1070 posix_spawn_file_actions_add{open,close,dup2}
1071 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
1072 when using RTLD_NEXT
1073 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
1074 `intl/{gettextP,loadinfo}.h'
1075 [19534] libc: execle, execlp may use malloc
1076 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
1077 [19573] network: res_nclose and __res_maybe_init disagree about name
1078 server initialization, breaking Hesiod
1079 [19575] localedata: Status of GB18030 tables
1080 [19581] localedata: sr_* date_fmt string contains additional newline
1081 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
1083 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
1084 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
1085 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
1086 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
1088 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
1090 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
1092 [19610] dynamic-link: ldconfig -X removes stale symbolic links
1093 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
1094 [19633] locale: strfmon_l applies global locale to number formatting
1095 [19642] network: Memory leak in getnameinfo
1096 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
1097 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
1099 [19654] math: [x86_64] Need testcase for BZ #19590 fix
1100 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
1102 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
1103 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
1105 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
1107 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
1109 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
1110 pointers and lengths in error-case.
1111 [19727] locale: Converting from/to UTF-xx with iconv() does not always
1112 report errors on UTF-16 surrogates values.
1113 [19755] nscd: nscd assertion failure in gc
1114 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
1115 [19759] libc: mempcpy shouldn't be inlined
1116 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
1117 [19765] libc: s390 needs an optimized mempcpy
1118 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1119 NAME_MAX limit assumption (CVE-2016-1234)
1120 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1121 [19787] network: Missing and incorrect truncation checks in getnameinfo
1122 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1124 [19791] network: Assertion failure in res_query.c with un-connectable name
1126 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1127 [19822] math: libm.so install clobbers old version
1128 [19825] network: resolv: send_vc can return uninitialized data in second
1129 response to getaddrinfo
1130 [19830] network: nss_dns: should check RDATA length against buffer length
1131 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1132 confronted with A/AAAA records of invalid size
1133 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1134 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1135 [19853] stdio: Printing IBM long double in decimal with high precision is
1137 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1138 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1139 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1141 [19865] network: Assertion failure or memory leak in
1142 _nss_dns_getcanonname_r
1143 [19868] network: nss_dns: netent code does not skip over non-PTR records
1144 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1146 [19881] string: Improve x86-64 memset
1147 [19907] string: Incorrect memcpy tests
1148 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1150 [19925] libc: termios.h XCASE namespace
1151 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1152 [19929] libc: limits.h NL_NMAX namespace
1153 [19931] stdio: Memory leak in vfprintf
1154 [19957] libc: clone(CLONE_VM) access invalid parent memory
1155 [19963] localedata: en_IL: New locale
1156 [19989] stdio: stdio.h cuserid namespace
1157 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1159 [19996] locale: langinfo.h nl_langinfo_l namespace
1160 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1161 [20010] network: getaddrinfo: Stack overflow in hostent translation
1163 [20012] stdio: libio: fmemopen append mode failure
1164 [20014] stdio: stdio.h namespace for pre-threads POSIX
1165 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1166 [20023] libc: fcntl.h timespec namespace
1167 [20024] math: [x86_64] vectorized sincos trashes the stack
1168 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1169 [20041] time: sys/time.h timespec namespace
1170 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1171 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1172 [20051] libc: ttyslot in wrong header under wrong conditions
1173 [20054] libc: gethostname not declared for XPG4
1174 [20055] libc: termios.h missing tcgetsid for XPG4
1175 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1177 [20073] libc: sys/stat.h fchmod namespace
1178 [20074] libc: stdlib.h rand_r namespace
1179 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1180 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1182 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1183 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1185 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1186 [20119] libc: Wrong mask for processors level type from CPUID
1187 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1188 AS not supporting AVX512
1189 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1191 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1192 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1194 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1195 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1196 [20178] libc: posix_spawn{p} should not call exit
1197 [20191] stdio: libio: vtables hardening
1198 [20195] string: FMA4 detection requires CPUID execution with register
1200 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1201 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1203 [20212] math: acos (sNaN) returns sNaN
1204 [20213] math: asin (sNaN) returns sNaN
1205 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1206 [20218] math: [i386] asinhl (sNaN) returns sNaN
1207 [20219] math: [i386] atanhl (sNaN) returns sNaN
1208 [20222] stdio: fopencookie: Mangle function pointers
1209 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1210 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1211 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1213 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1214 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1215 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1216 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1217 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1218 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1219 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1220 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1221 [20240] math: modf (sNaN) returns sNaN
1222 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1223 [20250] math: frexp (sNaN) returns sNaN
1224 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1225 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1227 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1228 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1229 subscript is below array bounds [-Werror=array-bounds]
1230 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1231 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1233 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1234 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1236 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1237 "invalid" exceptions
1238 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1239 [20316] localedata: id_ID: Februari instead of Pebruari
1240 [20327] string: POWER8 strcasecmp returns incorrect result
1241 [20347] math: Failure: Test: j0_downward (0xap+0)
1242 [20348] libc: FAIL: misc/tst-preadvwritev64
1243 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1244 [20350] libc: There is no test for p{read,write}64
1245 [20357] math: Incorrect cos result for 1.5174239687223976
1246 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1250 * Unicode 8.0.0 Support: Character encoding, character type info, and
1251 transliteration tables are all updated to Unicode 8.0.0, using new
1252 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1253 These updates cause user visible changes, such as the fixes for bugs
1254 89, 16061, and 18568.
1256 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1257 kernel-internal CPU set size. This means that requests that change the
1258 CPU affinity which failed before (for example, an all-ones CPU mask) will
1259 now succeed. Applications that need to determine the effective CPU
1260 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1261 setting it because the kernel can adjust it (and the previous size check
1262 would not detect this in the majority of cases).
1264 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1265 the following new symbols are used: fts64_children, fts64_close,
1266 fts64_open, fts64_read and fts64_set.
1268 * getaddrinfo now detects certain invalid responses on an internal netlink
1269 socket. If such responses are received, an affected process will
1270 terminate with an error message of "Unexpected error <number> on netlink
1271 descriptor <number>" or "Unexpected netlink response of size <number> on
1272 descriptor <number>". The most likely cause for these errors is a
1273 multi-threaded application which erroneously closes and reuses the netlink
1274 file descriptor while it is used by getaddrinfo.
1276 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1277 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1278 unnecessary serialization of memory allocation requests across threads.
1279 The defect is now corrected. Users should see a substantial increase in
1280 the concurent throughput of allocation requests for applications which
1281 trigger this bug. Affected applications typically create and
1282 destroy threads frequently. (Bug 19048 was reported and analyzed by
1285 * There is now a --disable-timezone-tools configure option for disabling the
1286 building and installing of the timezone related utilities (zic, zdump, and
1287 tzselect). This is useful for people who build the timezone data and code
1288 independent of the GNU C Library.
1290 * The obsolete header <regexp.h> has been removed. Programs that require
1291 this header must be updated to use <regex.h> instead.
1293 * The obsolete functions bdflush, create_module, get_kernel_syms,
1294 query_module and uselib are no longer available to newly linked binaries;
1295 the header <sys/kdaemon.h> has been removed. These functions and header
1296 were specific to systems using the Linux kernel and could not usefully be
1297 used with the GNU C Library on systems with version 2.6 or later of the
1300 * Optimized string, wcsmbs and memory functions for IBM z13.
1301 Implemented by Stefan Liebler.
1303 * Newly linked programs that define a variable called signgam will no longer
1304 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1305 require signgam to be set by those functions must ensure that they use the
1306 variable provided by the GNU C Library and declared in <math.h>, without
1307 defining their own copy.
1309 * The minimum GCC version that can be used to build this version of the GNU
1310 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1311 still be used to compile programs using the GNU C Library.
1313 Security related changes:
1315 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1316 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1318 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1319 the pointer guard feature. It is always enabled. Previously,
1320 LD_POINTER_GUARD could be used to disable security hardening in binaries
1321 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1324 * An integer overflow in hcreate and hcreate_r could lead to an
1325 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1327 * The catopen function no longer has unbounded stack usage. Reported by
1328 Max. (CVE-2015-8779)
1330 * The nan, nanf and nanl functions no longer have unbounded stack usage
1331 depending on the length of the string passed as an argument to the
1332 functions. Reported by Joseph Myers. (CVE-2014-9761)
1334 * A stack-based buffer overflow was found in libresolv when invoked from
1335 libnss_dns, allowing specially crafted DNS responses to seize control
1336 of execution flow in the DNS client. The buffer overflow occurs in
1337 the functions send_dg (send datagram) and send_vc (send TCP) for the
1338 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1339 family. The use of AF_UNSPEC triggers the low-level resolver code to
1340 send out two parallel queries for A and AAAA. A mismanagement of the
1341 buffers used for those queries could result in the response of a query
1342 writing beyond the alloca allocated buffer created by
1343 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
1344 the overflow. Thanks to the Google Security Team and Red Hat for
1345 reporting the security impact of this issue, and Robert Holiday of
1346 Ciena for reporting the related bug 18665. (CVE-2015-7547)
1348 The following bugs are resolved with this release:
1350 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
1351 [887] math: Math library function "logb" and "nextafter" inconsistent
1352 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
1353 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
1354 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
1355 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
1357 [4404] localedata: German translation of "Alarm clock" is misleading
1358 [6799] math: nextafter() and nexttoward() doen't set errno on
1359 overflow/underflow errors
1360 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
1362 [10432] nis: _nss_nis_setnetgrent assertion failure
1363 [11460] libc: fts has no LFS support
1364 [12926] network: getaddrinfo()/make_request() may spin forever
1365 [13065] nptl: Race condition in pthread barriers
1366 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
1367 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
1369 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
1370 [14912] libc: Rename non-installed bits/*.h headers
1371 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
1372 [15367] math: Let gcc use __builtin_isinf
1373 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
1374 [15421] math: lgamma wrongly sets signgam for ISO C
1375 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
1376 FE_INVALID with argument out of range
1377 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
1379 [15786] dynamic-link: ifunc resolver functions can smash function
1381 [15918] math: Unnecessary check for equality in hypotf()
1382 [16061] localedata: Review / update transliteration data
1383 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
1385 [16141] time: strptime %z offset restriction
1386 [16171] math: drem should be alias of remainder
1387 [16296] math: fegetround is pure?
1388 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
1389 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
1391 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
1392 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
1394 [16422] math: [powerpc] math-float, math-double failing llrint tests with
1395 "Exception "Inexact" set" on ppc32
1396 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
1397 [16517] math: Missing underflow exception from tanf/tan/tanl
1398 [16519] math: Missing underflow exception from sinhf
1399 [16520] math: Missing underflow exception from tanhf
1400 [16521] math: Missing underflow exception from exp2
1401 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
1403 [16734] stdio: fopen calls mmap to allocate its buffer
1404 [16961] math: nan function incorrect handling of bad sequences
1405 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
1406 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
1407 [16985] locale: localedef: confusing error message when opening output
1409 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
1410 [17197] locale: Redundant shift character in iconv conversion output at
1412 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
1413 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
1414 [17250] dynamic-link: static linking breaks nss loading
1415 (getaddrinfo/getpwnam/etc...)
1416 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
1418 [17441] math: isnan() should use __builtin_isnan() in GCC
1419 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
1420 (related to lock elision)
1421 [17787] manual: Exponent on page 324 of the PDF ends prematurely
1422 [17886] time: strptime should be able to parse "Z" as a timezone with %z
1423 [17887] time: strptime should be able to parse "+01:00" style timezones
1424 [17905] libc: catopen() Multiple unbounded stack allocations
1426 [18084] libc: backtrace (..., 0) dumps core on x86
1427 [18086] libc: nice() sets errno to 0 on success
1428 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
1429 is too large (CVE-2015-8778)
1430 [18251] dynamic-link: SONAME missing when audit modules provides path
1431 [18265] libc: add attributes for wchar string and memory functions
1432 [18370] math: csqrt missing underflows
1433 [18421] libc: [hppa] read-only segment has dynamic relocations
1434 [18472] libc: Obsolete syscall wrappers should be compat symbols
1435 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
1436 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
1437 [18525] localedata: Remove locale timezone information
1438 [18560] libc: [powerpc] spurious bits/ipc.h definitions
1439 [18568] localedata: Update locale data to Unicode 8.0
1440 [18589] locale: sort-test.sh fails at random
1441 [18595] math: ctan, ctanh missing underflows
1442 [18604] libc: assert macro-expands its argument
1443 [18610] math: S390: fetestexcept() reports any exception if DXC-code
1444 contains a vector instruction exception.
1445 [18611] math: j1, jn missing errno setting on underflow
1446 [18618] localedata: sync Chechen locale definitions with other *_RU
1448 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
1449 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
1450 [18665] network: In send_dg, the recvfrom function is NOT always using the
1451 buffer size of a newly created buffer (CVE-2015-7547)
1452 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
1454 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
1456 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
1457 [18699] math: tilegx cproj() for various complex infinities does not yield
1459 [18724] libc: Harden put*ent functions against data injection
1460 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
1461 [18755] build: build errors with -DNDEBUG
1462 [18757] stdio: fmemopen fails to set errno on failure
1463 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
1465 [18781] libc: openat64 lacks O_LARGEFILE
1466 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
1467 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
1468 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
1469 [18790] math: [ldbl-128ibm] tanhl inaccurate
1470 [18795] libc: stpncpy fortification misses buffer lengths that are
1471 statically too large
1472 [18796] build: build fails for --disable-mathvec
1473 [18803] math: hypot missing underflows
1474 [18820] stdio: fmemopen may leak memory on failure
1475 [18823] math: csqrt spurious underflows
1476 [18824] math: fma spurious underflows
1477 [18825] math: pow missing underflows
1478 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
1479 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
1480 [18870] build: sem_open.c fails to compile with missing symbol
1482 [18872] stdio: Fix memory leak in printf_positional
1483 [18873] libc: posix_fallocate overflow check ineffective
1484 [18875] math: Excess precision leads incorrect libm
1485 [18877] libc: arm: mmap offset regression
1486 [18887] libc: memory corruption when using getmntent on blank lines
1487 [18918] localedata: hu_HU: change time to HH:MM:SS format
1488 [18921] libc: Regression: extraneous stat() and fstat() performed by
1490 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
1491 binaries (CVE-2015-8777)
1492 [18951] math: tgamma missing underflows
1493 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
1495 [18953] localedata: lt_LT: change currency symbol to the euro
1496 [18956] math: powf inaccuracy
1497 [18961] math: [i386] exp missing underflows
1498 [18966] math: [i386] exp10 missing underflows
1499 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
1500 [18969] build: multiple string test failures due to missing locale
1502 [18970] libc: Reference of pthread_setcancelstate in libc.a
1503 [18977] math: float / long double Bessel functions not in XSI POSIX
1504 [18980] math: i386 libm functions return with excess range and precision
1505 [18981] math: i386 scalb*, ldexp return with excess range and precision
1506 [18982] stdio: va_list and vprintf
1507 [18985] time: Passing out of range data to strftime() causes a segfault
1509 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
1510 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
1511 [19012] locale: iconv_open leaks memory on error path
1512 [19016] math: clog, clog10 inaccuracy
1513 [19018] nptl: Mangle function pointers in tls_dtor_list
1514 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
1515 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
1516 [19048] malloc: malloc: arena free list can become cyclic, increasing
1518 [19049] math: [powerpc] erfc incorrect zero sign
1519 [19050] math: [powerpc] log* incorrect zero sign
1520 [19058] math: [x86_64] Link fail with -fopenmp and -flto
1521 [19059] math: nexttoward overflow incorrect in non-default rounding modes
1522 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
1523 [19074] network: Data race in _res_hconf_reorder_addrs
1524 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
1525 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
1526 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
1528 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
1530 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
1531 [19086] manual: posix_fallocate64 documented argument order is wrong.
1532 [19088] math: lround, llround missing exceptions close to overflow
1534 [19094] math: lrint, llrint missing exceptions close to overflow threshold
1535 [19095] math: dbl-64 lrint incorrect for 64-bit long
1536 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
1537 [19124] dynamic-link: ld.so failed to build with older assmebler
1538 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
1539 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
1540 [19134] math: [powerpc32] lround, lroundf spurious exceptions
1541 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
1542 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
1543 pthread_setaffinity_np
1544 [19156] math: [ldbl-128] j0l spurious underflows
1545 [19164] nptl: tst-getcpu fails with many possible CPUs
1546 [19168] math: math/test-ildoubl and math/test-ldouble failure
1547 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
1548 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
1550 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
1551 (FE_NOMASK_ENV) do not clear SSE exceptions
1552 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
1553 _int_new_arena/reused_arena
1554 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
1555 [19201] math: dbl-64 remainder incorrect sign of zero result
1556 [19205] math: bits/math-finite.h conditions do not match math.h and
1558 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
1559 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
1560 for C99-based standards
1561 [19212] libc: features.h not -Wundef clean
1562 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
1564 [19214] libc: Family and model identification for AMD CPU's are incorrect.
1565 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
1566 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
1568 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
1569 "inexact" exceptions
1570 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
1572 [19242] libc: strtol incorrect in Turkish locales
1573 [19243] malloc: reused_arena can pick an arena on the free list, leading
1574 to an assertion failure and reference count corruption
1575 [19253] time: tzset() ineffective when temporary TZ did not include DST
1577 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
1578 [19270] math: [hppa] Shared libm missing __isnanl
1579 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
1580 MAP_HUGETLB and MAP_STACK defines
1581 [19313] nptl: Wrong __cpu_mask for x32
1582 [19347] libc: grantpt: try to force a specific gid even without pt_chown
1583 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
1584 [19350] math: [ldbl-128ibm] sinhl spurious overflows
1585 [19351] math: [ldbl-128ibm] logl inaccurate near 1
1586 [19363] time: x32: times() return value wrongly truncates/sign extends
1588 [19367] dynamic-link: Improve branch prediction on Silvermont
1589 [19369] network: Default domain name not reset by res_ninit when "search"
1590 / "domain" entry is removed from resolv.conf
1591 [19375] math: powerpc: incorrect results for POWER7 logb with negative
1593 [19385] localedata: bg_BG: time separator should be colon, not comma
1594 [19408] libc: linux personality syscall wrapper may erroneously return an
1595 error on 32-bit architectures
1596 [19415] libc: dladdr returns wrong names on hppa
1597 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
1598 IBM905, IBM907, and IBM909
1599 [19439] math: Unix98 isinf and isnan functions conflict with C++11
1600 [19443] build: build failures with -DDEBUG
1601 [19451] build: Make check fails on test-double-vlen2
1602 [19462] libc: Glibc failed to build with -Os
1603 [19465] math: Wrong code with -Os
1604 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
1606 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
1608 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
1609 [19486] math: S390: Math tests fail with "Exception Inexact set".
1610 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
1611 [19550] libc: [mips] mmap negative offset handling inconsistent with other
1613 [19590] math: Fail to build shared objects that use libmvec.so functions.
1617 * The following bugs are resolved with this release:
1619 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
1620 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
1621 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
1622 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
1623 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
1624 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
1625 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
1626 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
1627 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
1628 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
1629 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
1630 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
1631 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
1632 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
1633 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
1634 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
1635 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
1636 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
1637 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
1638 18657, 18676, 18694, 18696, 18887.
1640 * Cache information can be queried via sysconf() function on s390 e.g. with
1641 _SC_LEVEL1_ICACHE_SIZE as argument.
1643 * A buffer overflow in gethostbyname_r and related functions performing DNS
1644 requests has been fixed. If the NSS functions were called with a
1645 misaligned buffer, the buffer length change due to pointer alignment was
1646 not taken into account. This could result in application crashes or,
1647 potentially arbitrary code execution, using crafted, but syntactically
1648 valid DNS responses. (CVE-2015-1781)
1650 * The time zone file parser has been made more robust against crafted time
1651 zone files, avoiding heap buffer overflows related to the processing of
1652 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
1653 large time zone data files. Overly long time zone specifiers in the TZ
1654 variable no longer result in stack overflows and crashes.
1656 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
1657 for LD and GD on x86 and x86-64, has been implemented. You will need
1658 binutils-2.24 or later to enable this optimization.
1660 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
1661 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
1662 Hat). These updates cause user visible changes, such as the fix for bug
1665 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
1666 and getXXbyYY NSS calls for the same database, causing a denial-of-service
1667 condition in some applications.
1669 * Added vector math library named libmvec with the following vectorized x86_64
1670 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
1672 The library can be disabled with --disable-mathvec. Use of the functions is
1673 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
1674 Shared library libmvec.so is linked in as needed when using -lm (no need to
1675 specify -lmvec explicitly for not static builds).
1676 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
1678 * A new fmemopen implementation has been added with the goal of POSIX
1679 compliance. The new implementation fixes the following long-standing
1680 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
1681 old implementation is still present for use be by existing binaries.
1683 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
1684 releases. It has been fixed to match 2.19 and older, but binaries built
1685 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
1687 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
1688 Contributed by Roland McGrath (Google).
1690 * The header <regexp.h> is deprecated, and will be removed in a future
1691 release. Use of this header will trigger a deprecation warning.
1692 Application developers should update their code to use <regex.h> instead.
1694 This header was formerly part of SUS, but was deprecated in 1994 and
1695 removed from the standard in 2001. Also, the glibc implementation
1696 leaks memory. See BZ#18681 for more details.
1700 * The following bugs are resolved with this release:
1702 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
1703 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
1704 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
1705 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
1706 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
1707 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
1708 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
1709 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
1710 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
1711 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
1714 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
1715 too little memory for the to-be-scanned arguments and overflow the
1716 allocated buffer. The implementation now correctly computes the required
1717 buffer size when using malloc, and switches to malloc from alloca as
1720 * A new semaphore algorithm has been implemented in generic C code for all
1721 machines. Previous custom assembly implementations of semaphore were
1722 difficult to reason about or ensure that they were safe. The new version
1723 of semaphore supports machines with 64-bit or 32-bit atomic operations.
1724 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
1725 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
1727 * Port to Altera Nios II has been contributed by Mentor Graphics.
1729 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
1730 implementations for powerpc64/powerpc64le.
1731 Implemented by Adhemerval Zanella (IBM).
1733 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
1734 and powerpc64le. This may improve lock scaling of existing programs on
1735 HTM capable systems. The lock elision code is only enabled with
1736 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1737 powerpc will issue a transaction abort on every syscall to avoid side
1738 effects being visible outside transactions.
1740 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1741 AArch64. Contributed by ARM Ltd.
1743 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1745 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1746 under certain input conditions resulting in the execution of a shell for
1747 command substitution when the application did not request it. The
1748 implementation now checks WRDE_NOCMD immediately before executing the
1749 shell and returns the error WRDE_CMDSUB as expected.
1751 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1752 processing format strings with a large number of format specifiers.
1754 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1755 infinite loop if the DNS response contained a PTR record of an unexpected
1758 * The minimum GCC version that can be used to build this version of the GNU
1759 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1760 still be used to compile programs using the GNU C Library.
1762 * The GNU C Library is now built with -Werror by default. This can be
1763 disabled by configuring with --disable-werror.
1765 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1767 * The obsolete sigvec function has been removed. This was the original
1768 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1769 programs have been using instead for about 25 years. Of course, ABI
1770 compatibility for old binaries using sigvec remains intact.
1772 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1773 with newer versions of bison.
1775 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1776 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1777 registers overlay two consecutive single-precision registers. MIPS32R2
1778 introduced a new FPU mode (FR=1) where double-precision registers extend the
1779 corresponding single-precision registers which is incompatible with the
1780 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1781 require the use of FR=1 making a transition necessary. New o32 ABI
1782 extensions enable users to migrate over time from the original o32 ABI
1783 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1784 tracks the ABI of any loaded object and verifies that new objects are
1785 compatible. Mode transitions will also be requested as required and
1786 unsupportable objects will be rejected. The ABI checks include both soft and
1787 hard float ABIs for o32, n32 and n64.
1789 GCC 5 with GNU binutils 2.25 onwards:
1790 It is strongly recommended that all o32 system libraries are built using the
1791 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1792 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1793 compiler using --with-fp-32=xx to set this by default.
1797 * The following bugs are resolved with this release:
1799 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1800 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1801 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1802 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1803 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1804 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1805 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1806 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1807 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1808 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1809 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1810 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1811 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1812 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1813 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1815 * Reverted change of ABI data structures for s390 and s390x:
1816 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1817 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1818 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1819 are preserved pointing straight to the same implementation as the old ones.
1820 Given that, new callers will simply provide a too-big buffer to these
1821 functions. Any applications/libraries out there that embed jmp_buf or
1822 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1823 against 2.19 headers will have to rebuilt again. This is necessary in any
1824 case to revert the breakage in their ABI caused by the glibc change.
1826 * Support for file description locks is added to systems running the
1827 Linux kernel. The standard file locking interfaces are extended to
1828 operate on file descriptions, not file descriptors, via the use of
1829 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1830 are associated with an open file instead of a process.
1832 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1834 * The minimum Linux kernel version that this version of the GNU C Library
1835 can be used with is 2.6.32.
1837 * Running the testsuite no longer terminates as soon as a test fails.
1838 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1839 with PASS or FAIL lines for individual tests. A summary of the results is
1840 printed, including a list of failing lists, and "make check" exits with
1841 error status if there were any unexpected failures. "make check
1842 stop-on-test-failure=y" may be used to keep the old behavior.
1844 * The am33 port, which had not worked for several years, has been removed
1847 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1848 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1849 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1850 conflicted with POSIX (support for which was removed in 2.19), the
1851 interfaces those macros enabled remain available when compiling with
1852 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1853 test macros defined.
1855 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1857 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1858 This may improve lock scaling of existing programs on TX capable systems.
1859 The lock elision code is only built with --enable-lock-elision=yes and
1860 then requires a GCC version supporting the TX builtins. With lock elision
1861 default mutexes are elided via __builtin_tbegin, if the cpu supports
1862 transactions. By default lock elision is not enabled and the elision code
1865 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1866 copy the path argument. This allowed programs to cause posix_spawn to
1867 deference a dangling pointer, or use an unexpected pathname argument if
1868 the string was modified after the posix_spawn_file_actions_addopen
1871 * All supported architectures now use the main glibc sysdeps directory
1872 instead of some being in a separate "ports" directory (which was
1873 distributed separately before glibc 2.17).
1875 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1876 On configurations that support it (all Linux configurations), it's now
1877 used regardless of the --enable-add-ons switch to configure. It is no
1878 longer possible to build such configurations without pthreads support.
1880 * Locale names, including those obtained from environment variables (LANG
1881 and the LC_* variables), are more tightly checked for proper syntax.
1882 setlocale will now fail (with EINVAL) for locale names that are overly
1883 long, contain slashes without starting with a slash, or contain ".." path
1884 components. (CVE-2014-0475) Previously, some valid locale names were
1885 silently replaced with the "C" locale when running in AT_SECURE mode
1886 (e.g., in a SUID program). This is no longer necessary because of the
1889 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1890 with application code using Intel MPX instructions. (With all previous
1891 versions, the MPX register state could be clobbered when making calls
1892 into or out of a shared library.) Note that while the new dynamic
1893 linker is compatible with all known x86 hardware whether or not it
1894 supports Intel MPX, some x86 instruction-set emulators might fail to
1895 handle the new instruction encodings. This is known to affect Valgrind
1896 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1897 release), and might affect other tools that do instruction emulation.
1899 * Support for loadable gconv transliteration modules has been removed.
1900 The support for transliteration modules has been non-functional for
1901 over a decade, and the removal is prompted by security defects. The
1902 normal gconv conversion modules are still supported. Transliteration
1903 with //TRANSLIT is still possible, and the //IGNORE specifier
1904 continues to be supported. (CVE-2014-5119)
1906 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1907 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1908 resulting a denial-of-service security vulnerability in applications which
1909 use functions related to iconv. (CVE-2014-6040)
1913 * The following bugs are resolved with this release:
1915 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1916 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1917 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1918 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1919 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1920 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1921 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1922 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1923 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1924 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1925 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1926 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1927 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1928 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1929 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1930 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1931 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1932 16431, 16453, 16474, 16506, 16510, 16529
1934 * Slovenian translations for glibc messages have been contributed by the
1935 Translation Project's Slovenian team of translators.
1937 * The public headers no longer use __unused nor __block. This change is to
1938 support compiling programs that are derived from BSD sources and use
1939 __unused internally, and to support compiling with Clang's -fblock
1940 extension which uses __block.
1942 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1943 large collation sequences to optimize multiple passes. This cache
1944 computation may overflow for large collation sequences and may cause a
1945 stack or buffer overflow. This is now fixed to use a slower algorithm
1946 which does not use a cache if there is an integer overflow.
1948 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1949 rules for large collation sequences to optimize multiple passes and falls
1950 back to alloca if malloc fails, resulting in a possible stack overflow.
1951 The implementation now falls back to an uncached collation sequence lookup
1954 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1955 initialized for static applications resulting in the security feature
1956 being disabled. The pointer guard is now correctly initialized to a
1957 random value for static applications. Existing static applications need
1958 to be recompiled to take advantage of the fix (bug 15754).
1960 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1961 to the d_name member of struct dirent, or omit the terminating NUL
1962 character. (Bugzilla #14699).
1964 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1965 aligned_alloc functions could allocate too few bytes or corrupt the
1966 heap when passed very large allocation size values (Bugzilla #15855,
1969 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1970 for AF_INET6 has been fixed (Bugzilla #16072).
1972 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1973 pap_CW, quz_PE, the_NP.
1975 * Substantially revised locales: gd_GB, ht_HT
1977 * The LC_ADDRESS field was updated to support country_car for almost all
1980 * ISO 1427 definitions were updated.
1982 * ISO 3166 definitions were updated.
1984 * The localedef utility now supports --big-endian and --little-endian
1985 command-line options to generate locales for a different system from that
1986 for which the C library was built.
1988 * Binary locale files now only depend on the endianness of the system for
1989 which they are generated and not on other properties of that system. As a
1990 consequence, binary files generated with new localedef may be incompatible
1991 with old versions of the GNU C Library, and binary files generated with
1992 old localedef may be incompatible with this version of the GNU C Library,
1993 in the following circumstances:
1995 + Locale files may be incompatible on m68k systems.
1997 + Locale archive files (but not separate files for individual locales) may
1998 be incompatible on systems where plain "char" is signed.
2000 * The configure option --disable-versioning has been removed. Builds with
2001 --disable-versioning had not worked for several years.
2003 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
2004 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
2006 * SystemTap probes for malloc have been introduced.
2008 * SystemTap probes for slow multiple precision fallback paths of
2009 transcendental functions have been introduced.
2011 * Support for powerpc64le has been added.
2013 * The soft-float powerpc port now supports e500 processors.
2015 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
2017 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
2018 set of header declarations that are enabled by default, even when other
2019 feature test macros or compiler options such as -std=c99 would otherwise
2020 disable some of those declarations.
2022 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
2023 conflict with POSIX. The libbsd-compat library (which was a dummy library
2024 that did nothing) has also been removed.
2026 * Preliminary documentation about Multi-Thread, Async-Signal and
2027 Async-Cancel Safety has been added.
2029 * Change of ABI data structures for s390 and s390x:
2030 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
2031 allow for future hardware extensions. All library functions that accept or
2032 return these structures were versioned in order to provide backwards
2033 compatibility with existing code. However, not all cases can be handled
2034 with interface versioning. If an application embeds either structure into
2035 another structure and that structure is passed to another compilation unit
2036 which expects the newer larger-sized object then any access to the new
2037 fields will result in undefined behaviour. Similarly any access to fields
2038 that were moved by the enlarging of the structures will cause undefined
2039 behaviour. To fix the undefined behaviour all objects that are part of the
2040 final in-memory image must agree on the size of structures, and this may
2041 require recompilation.
2045 * The following bugs are resolved with this release:
2047 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
2048 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
2049 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
2050 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
2051 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
2052 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
2053 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
2054 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
2055 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
2056 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
2057 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
2058 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
2059 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
2062 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
2063 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
2064 Distributions can re-enable building and using pt_chown via the new configure
2065 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
2066 considerable security risks and should only be used if the distribution
2067 understands and accepts the risks.
2069 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
2072 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
2073 fixed (Bugzilla #15330).
2075 * Add support for calling C++11 thread_local object destructors on thread
2076 and program exit. This needs compiler support for offloading C++11
2077 destructor calls to glibc.
2079 * Improved worst case performance of libm functions with double inputs and
2082 * Support for priority inherited mutexes in pthread condition variables on
2083 non-x86 architectures.
2085 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
2087 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
2089 * Optimized string functions for ARM. Implemented by Will Newton and
2092 * Optimized libm functions for SPARC. Implemented by David S. Miller.
2094 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
2097 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
2098 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
2100 * Added a benchmark framework to track performance of functions in glibc.
2102 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
2103 It is based on draft TS 18661 and currently enabled as a GNU extension.
2105 * On Linux, the clock function now uses the clock_gettime system call
2106 for improved precision, rather than old times system call.
2108 * Added support for version-3 tz format files. This is needed when using
2109 the tz database release 2013e or later, and affects a few unusual cases --
2110 currently only TZ='America/Godthab' for time stamps after 2037.
2112 * Added new API functions pthread_getattr_default_np and
2113 pthread_setattr_default_np to get and set the default pthread
2114 attributes of a process.
2116 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
2117 This may improve lock scaling of existing programs on TSX capable systems.
2118 When the --enable-lock-elision=yes parameter is specified at configure
2119 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2122 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2123 availability). Implemented by Ryan S. Arnold.
2125 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2129 * The following bugs are resolved with this release:
2131 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2132 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2133 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2134 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2135 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2136 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2137 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2138 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2139 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2140 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2141 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2142 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2143 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2144 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2145 14879, 14889, 14893, 14898, 14914.
2147 * Optimization of memcpy for MIPS.
2149 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2150 EMFILE has been fixed (Bugzilla #14889).
2152 * The add-on ports collection is now distributed in the "ports" subdirectory
2153 of the main GNU C Library distribution, rather than separately.
2155 * Port to ARM AArch64 contributed by Linaro.
2157 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2158 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2160 Implemented by Andreas Krebbel.
2162 * The new function secure_getenv allows secure access to the environment,
2163 returning NULL if running in a SUID/SGID process. This function replaces
2164 the internal function __secure_getenv.
2166 * SystemTap static probes have been added into the dynamic linker.
2167 Implemented by Gary Benson.
2169 * Optimizations of string functions strstr, strcasestr and memmem.
2170 Implemented by Maxim Kuvyrkov.
2172 * The minimum Linux kernel version that this version of the GNU C Library
2173 can be used with is 2.6.16.
2175 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2176 powerpc POWER7. Implemented by Will Schmidt.
2178 * New configure option --disable-nscd builds the C library such that it
2179 never attempts to contact the Name Service Caching Daemon (nscd).
2180 New configure option --disable-build-nscd avoids building nscd itself;
2181 this is the default if --disable-nscd is used.
2183 * Improved support for cross-compilation, including cross-testing and
2184 bootstrap builds without a previously built glibc.
2186 * Several testsuite tests are now able to test multiple IFUNC variants of an
2187 interface, rather than just testing the one that would be chooen by
2190 * New configure options --with-bugurl and --with-pkgversion, for
2191 distributors to use to embed their bug-reporting and package version
2192 information in --help and --version output.
2194 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2195 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2196 allows creation of chroots without the procfs mounted on /proc.
2198 * The `crypt' function now fails if passed salt bytes that violate the
2199 specification for those values. On Linux, the `crypt' function will
2200 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2201 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2202 when the mode is enabled.
2204 * The `clock_*' suite of functions (declared in <time.h>) is now available
2205 directly in the main C library. Previously it was necessary to link with
2206 -lrt to use these functions. This change has the effect that a
2207 single-threaded program that uses a function such as `clock_gettime' (and
2208 is not linked with -lrt) will no longer implicitly load the pthreads
2209 library at runtime and so will not suffer the overheads associated with
2210 multi-thread support in other code such as the C++ runtime library.
2212 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2217 * The following bugs are resolved with this release:
2219 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2220 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2221 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2222 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2223 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2224 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2225 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2226 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2227 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2228 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2229 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2230 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2231 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2232 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2233 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2234 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2235 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2236 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2237 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2238 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2239 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2240 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2243 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2244 configuring glibc with:
2245 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2246 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2247 Implemented by H.J. Lu.
2251 + define static_assert
2253 + do not declare gets
2255 + declare at_quick_exit and quick_exit also for ISO C11
2257 + aligned_alloc. NB: The code is deliberately allows the size parameter
2258 to not be a multiple of the alignment. This is a moronic requirement
2259 in the standard but it is only a requirement on the caller, not the
2262 + timespec_get added
2264 + uchar.h support added
2266 + CMPLX, CMPLXF, CMPLXL added
2268 Implemented by Ulrich Drepper.
2270 * Support for the IA-64 has been moved to ports.
2272 * Remove support for anything but ELF binary format
2274 * Checking versions of poll, ppoll added.
2275 Implemented by Ulrich Drepper.
2277 * More generic and 64-bit performance optimizations to math functions.
2278 Implemented by Ulrich Drepper.
2280 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2281 headers and functions available at compile time as they were before
2282 version 2.14. This option will be removed at some time in the future
2283 after the TI-RPC library becomes fully sufficient for the needs of
2284 existing applications.
2286 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2287 Note that glibc is not expected to work with any Linux kernel version
2290 * New header <sys/auxv.h> and function getauxval allowing easy access to
2291 the AT_* key-value pairs passed from the Linux kernel. The header also
2292 defines the HWCAP_* bits associated with the AT_HWCAP key.
2294 * New locales: mag_IN
2296 * New configure option --enable-systemtap builds SystemTap static probes
2297 into libc for setjmp and longjmp and into libpthread for various operations.
2298 So far the setjmp/longjmp probes and some of the libpthread probes are
2299 provided only for i*86 and x86_64.
2300 Implemented by Roland McGrath and Rayson Ho.
2302 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2304 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2307 * More optimized functions for SPARC. Implemented by David S. Miller.
2309 * Improved support for cross-compilation, especially bootstrap builds
2310 without a previously built glibc.
2312 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2313 Chris Metcalf from Tilera.
2315 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2316 now supported for ARM processors.
2318 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2319 as the name of the dynamic linker, to distinguish it from the
2320 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2322 * Support for CRIS has been removed from ports.
2324 * A new class of installed header has been documented for low-level
2325 platform-specific functionality. PowerPC added the first instance with a
2326 function to provide time base register access. Contributed by Tulio
2327 Magno Quites Machado Filho.
2329 * ix86 configurations now install header files that are consistent with
2330 what x86-64 configurations install. These same header files can be used
2331 for -m32, -m64, or -mx32 builds.
2332 Contributed by H.J. Lu.
2334 * Math library bug fixes. A thorough audit of all open math library bugs was
2335 conducted by Joseph Myers. Significant progress was made on many math
2336 library bugs resulting in more accurate exceptions and function results.
2337 Many thanks to all those that contributed including Andreas Jaeger for his
2338 patch review and work on the x87 trigonometric instruction issues.
2340 * Timezone data is no longer installed. Timezone-related binaries and scripts
2341 will continue to be installed. Users should obtain their timezone data from
2342 their distribution provider or from the tzdata package at
2343 <ftp://munnari.oz.au/pub/>.
2347 * The following bugs are resolved with this release:
2349 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
2350 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
2351 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
2352 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
2353 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
2354 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
2355 13484, 13506, 13515, 13523, 13524, 13538, 13540
2357 * New program pldd to list loaded object of a process
2358 Implemented by Ulrich Drepper.
2360 * Add nss_db support back to glibc. No more dependency on Berkeley db
2361 and support for initgroups lookups.
2362 Implemented by Ulrich Drepper.
2364 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
2365 Contributed by HJ Lu.
2367 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
2368 Contributed by HJ Lu.
2370 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
2371 on x86-32 and x86-64.
2372 Contributed by Liubov Dmitrieva.
2374 * Optimized strchr and strrchr for SSE on x86-32.
2375 Contributed by Liubov Dmitrieva.
2377 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
2378 for x86-64 and x86-32.
2379 Contributed by Liubov Dmitrieva.
2381 * New interfaces: scandirat, scandirat64
2382 Implemented by Ulrich Drepper.
2384 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
2385 Implemented by Ulrich Drepper.
2387 * nscd now also caches the netgroup database.
2388 Implemented by Ulrich Drepper.
2390 * Integrate libm with gcc's -ffinite-math-only option.
2391 Implemented by Ulrich Drepper.
2393 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
2394 to math functions. Implemented by Ulrich Drepper.
2396 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
2397 Implemented by Ulrich Drepper.
2399 * New Linux interfaces: process_vm_readv, process_vm_writev
2401 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
2402 Implemented by Ulrich Drepper.
2404 * Optimized nearbyint and strcasecmp for PPC.
2405 Implemented by Adhemerval Zanella.
2407 * New locales: bho_IN, unm_US, es_CU, ta_LK
2411 * The following bugs are resolved with this release:
2413 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
2414 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
2415 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
2416 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
2417 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
2418 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
2419 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
2420 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
2421 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
2422 12795, 12811, 12813, 12814, 12841
2424 * The RPC implementation in libc is obsoleted. Old programs keep working
2425 but new programs cannot be linked with the routines in libc anymore.
2426 Programs in need of RPC functionality must be linked against TI-RPC.
2427 The TI-RPC implementation is IPv6 enabled and there are other benefits.
2429 Visible changes of this change include (obviously) the inability to link
2430 programs using RPC functions without referencing the TI-RPC library and the
2431 removal of the RPC headers from the glibc headers.
2432 Implemented by Ulrich Drepper.
2434 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
2435 syncfs, setns, sendmmsg
2437 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
2438 yue_HK, lij_IT, mhr_RU
2440 * New encodings: CP770, CP771, CP772, CP773, CP774
2442 * New program sotruss to trace calls through PLTs
2443 Implemented by Ulrich Drepper.
2445 * The malloc hook implementation is marked deprecated and will be removed
2446 from the default implementation in the next version. The design never
2447 worked ever since the introduction of threads. Even programs which do
2448 not create threads themselves can use multiple threads created internally.
2452 * The following bugs are resolved with this release:
2454 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
2455 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
2456 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
2457 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
2460 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
2462 * POWER7 optimizations: memset, memcmp, strncmp
2464 * New optimized string functions for x86-64: strnlen (SSE2),
2465 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
2466 Implemented by Ulrich Drepper.
2470 * The following bugs are resolved with this release:
2472 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
2473 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
2474 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
2475 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
2476 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
2477 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
2478 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
2479 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
2481 * New interfaces: pthread_getname_np, pthread_setname_np
2483 * New Linux interface: recvmmsg
2485 * STT_GNU_IFUNC implemented for Sparc by David Miller.
2487 * The dynamic linker now recognizes supported ABI versions from the
2488 EI_ABIVERSION field in the ELF header.
2489 Implemented by Ulrich Drepper.
2491 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
2492 will not be used to fill in password fields in the passwd.byname replies.
2493 Instead it is used to synthesize the shadow.byname table, should it be
2494 missing. This is a useful mode in some installations involving Solaris.
2495 Implemented by Ulrich Drepper.
2497 * New locales: kok_IN, sq_MK, cv_RU
2501 * The following bugs are resolved with this release:
2503 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
2504 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
2505 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
2506 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
2507 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
2508 10789, 10817, 10823, 10840, 10847
2510 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
2512 Implemented by Ulrich Drepper.
2514 * Checking version of longjmp added that fails if an uninitialized stack
2515 frame would be created. Implemented by Ulrich Drepper.
2517 * STT_GNU_IFUNC is now supported in static executables.
2518 Implemented by H.J. Lu.
2520 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
2522 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
2523 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
2524 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
2525 Contributed by H.J. Lu.
2527 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
2528 Implemented by Ulrich Drepper.
2530 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
2532 Contributed by H.J. Lu.
2534 * Support for fma instruction in AVX on x86-64.
2535 Implemented by H.J. Lu and Ulrich Drepper.
2537 * AVX support in x86-64 auditing support in ld.so.
2538 Implemented by H.J. Lu.
2540 * STB_GNU_UNIQUE support added.
2541 Implemented by Ulrich Drepper.
2543 * Implement second fallback mode for optimized DNS lookup for even more
2544 broken environments. If two requests from the same port are not
2545 handled correctly close the socket and open a new one before sending
2546 the second request. The 'single-request-reopen' option in /etc/resolv.conf
2547 can be used to select this mode right away, instead of rediscovering the
2548 necessity is every process again.
2549 Implemented by Ulrich Drepper.
2551 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
2552 Implemented by Adam Tkac.
2554 * Optimized iconv conversions for S390x.
2555 Implemented by Andreas Krebbel.
2557 * Using condvars with PI mutexes is now more efficient due to kernel
2558 support for requeueing to PI futexes. NPTL support added for x86-64.
2559 Implemented by Ulrich Drepper.
2561 * New locales: ps_AF, my_MM
2565 * The following bugs are resolved with this release:
2567 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
2568 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
2569 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
2570 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
2571 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
2573 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
2574 Implemented by Ulrich Drepper.
2576 * New Linux interfaces: accept4, fallocate, fallocate64.
2577 Implemented by Ulrich Drepper.
2579 * Correct declarations of string function when used in C++ code. This
2580 could lead to compile errors for invalid C++ code.
2582 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
2585 * New POSIX 2008 interface: psiginfo
2586 Implemented by Ulrich Drepper.
2588 * New ISO C++1x interfaces: quick_exit, at_quick_exit
2589 Implemented by Ulrich Drepper.
2591 * Support for selecting between multiple function definitions at runtime
2592 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
2594 * The libcrypt library can now use the hash function implementations in
2595 NSS. Implemented by Ulrich Drepper.
2597 * The malloc implementation can be compiled to be less memory efficient
2598 but higher performing in multi-threaded programs.
2599 Implemented by Ulrich Drepper.
2601 * New locales: nan_TW@latin, ks_IN
2603 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
2604 Implemented by Ulrich Drepper.
2606 * Extended printf hook support. It is possible to use user-defined types
2607 and extend existing format specifiers.
2608 Implemented by Ulrich Drepper.
2610 * Handling for group shadow files has been added.
2611 Implemented by Ulrich Drepper.
2613 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
2614 servers (the case, e.g., for some people using the built-in DNS
2615 server in ADSL modems/routers). There is a once-per-process timeout
2616 in case of a broken server. To avoid it, users can run nscd or put
2617 'options single-request' in /etc/resolv.conf.
2618 Implemented by Ulrich Drepper.
2622 * The following bugs are resolved with this release:
2624 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
2625 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
2626 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
2627 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
2628 6968, 6974, 6980, 6995, 7008, 7009, 7029
2630 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
2631 up at the same time. Implemented by Ulrich Drepper.
2633 * TLS descriptors for LD and GD on x86 and x86-64.
2634 Implemented by Alexandre Oliva.
2636 * getaddrinfo now handles DCCP and UDPlite.
2637 Implemented by Ulrich Drepper.
2639 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
2640 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
2641 Implemented by Ulrich Drepper.
2643 * New implementation of memmem, strstr, and strcasestr which is O(n).
2644 Implemented by Eric Blake.
2646 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
2648 * Implement "e" option for popen to open file descriptor with the
2649 close-on-exec flag set. Implemented by Ulrich Drepper.
2651 * Implement "b" mode for fmemopen. In this mode writes writes don't
2652 implicitly add a NUL byte and seeks from the end of the buffer really
2653 use the buffer end, not the string length as the basis.
2654 Implemented by Ulrich Drepper.
2656 * Many functions, exported and internal, now atomically set the close-on-exec
2657 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
2659 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
2661 Implemented by Pravin Satpute.
2663 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
2667 * The following bugs are resolved with this release:
2669 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
2670 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
2671 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
2672 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
2673 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
2674 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
2675 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
2677 * New locales: bo_CN, bo_IN, shs_CA.
2679 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
2681 * Sorting rules for some Indian languages (Devanagari and Gujarati).
2682 Implemented by Pravin Satpute.
2684 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
2686 * nscd caches now all timeouts for DNS entries
2687 Implemented by Ulrich Drepper.
2689 * nscd is more efficient and wakes up less often.
2690 Implemented by Ulrich Drepper.
2692 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
2693 vdprintf, and obstack_vprintf.
2694 Implemented by Jakub Jelinek.
2696 * Faster memset for x86-64.
2697 Implemented by Harsha Jagasia and H.J. Lu.
2699 * Faster memcpy on x86.
2700 Implemented by Ulrich Drepper.
2702 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
2703 Implemented by Ulrich Drepper.
2705 * Faster sqrt and sqrtf implemention for some PPC variants.
2706 Implemented by Steven Munroe.
2710 * The following bugs are resolved with this release:
2712 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
2713 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
2714 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
2715 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
2716 5071, 5103, 5104, 5112, 5113, 5184, 5186
2718 * More checking functions: fread, fread_unlocked, open*, mq_open.
2719 Implemented by Jakub Jelinek and Ulrich Drepper.
2721 * Extend fortification to C++. Implemented by Jakub Jelinek.
2723 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
2724 by not recognizing 'a' as a modifier when those specs are requested.
2725 Implemented by Jakub Jelinek.
2727 * PPC optimizations to math and string functions.
2728 Implemented by Steven Munroe.
2730 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
2731 options to be passed. Implemented by Ulrich Drepper.
2733 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
2735 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
2736 Implemented by Ulrich Drepper.
2738 * Handle private futexes in the NPTL implementation.
2739 Implemented by Jakub Jelinek and Ulrich Drepper.
2741 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2742 Implemented by Roland McGrath and Ulrich Drepper.
2744 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2746 * SHA-256 and SHA-512 based password encryption.
2747 Implemented by Ulrich Drepper.
2749 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2750 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2753 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2754 Implemented by Ulrich Drepper.
2758 * The following bugs are resolved with this release:
2760 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2761 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2762 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2763 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2764 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2765 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2766 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2769 * New Linux interfaces: epoll_pwait, sched_getcpu.
2771 * New generic interfaces: strerror_l.
2773 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2777 * The following bugs are resolved with this release:
2779 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2780 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2781 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2782 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2783 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2784 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2785 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2786 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2787 3225, 3251, 3252, 3253, 3273
2789 * For Linux, the sorting of addresses returned by getaddrinfo now also
2790 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2791 Implemented by Ulrich Drepper.
2793 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2794 Implemented by Ulrich Drepper.
2796 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2798 * New iconv module for MIK. Contributed by Alexander Shopov.
2800 * For sites with broken group and/or passwd database, the auto-propagate
2801 option of nscd can prevent creating ID lookup entries from the results
2802 of a name lookup and vice versa. This usually is no problem but some
2803 site might have problems with the default behavior.
2804 Implemented by Ulrich Drepper.
2806 * Iterating over entire database in NIS can be slow. With the
2807 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2808 to trade time for memory. The entire database will be read at once.
2809 Implemented by Ulrich Drepper.
2811 * The interfaces introduced in RFC 3542 have been implemented by
2814 * Support for the new ELF hash table format was added by Ulrich Drepper.
2816 * Support for priority inheritance mutexes added by Jakub Jelinek and
2819 * Support for priority protected mutexes added by Jakub Jelinek.
2821 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2822 or_IN, csb_PL, fy_NL, sr_ME.
2826 * More overflow detection functions.
2828 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2829 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2831 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2832 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2833 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2834 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2835 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2836 by Masahide Washizawa.
2838 * It is now possible to install audit libraries for the dynamic linker using
2839 LD_AUDIT. Implemented by Ulrich Drepper.
2841 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2842 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2843 For a libc and libpthread that works well on Linux 2.4 kernels, we
2844 recommend using the stable 2.3 branch.
2846 * The new function open_wmemstream acts like open_memstream,
2847 but uses a wchar_t wide character buffer.
2849 * The new function ppoll is an improved version of poll, similar to pselect.
2851 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2852 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2853 renameat, unlinkat, linkat, symlinkat, readlinkat.
2855 * New Linux kernel system calls: unshare,
2856 inotify_init, inotify_add_watch, inotify_rm_watch.
2858 * The euidaccess function is now also known by the alias eaccess,
2859 for compatibility with some other systems.
2861 * Timezone data updated to 2006b version.
2865 * The following bugs are resolved with this release:
2867 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2868 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2869 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2870 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2871 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2872 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2874 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2876 * As of this release, GCC 4 can be used to compile the C Library.
2878 * Timezone data updated to 2005m version.
2882 * The following bugs are resolved with this release:
2884 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2885 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2886 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2887 777, 787, 821, 822, 823, 825
2889 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2893 * Support for RFC 3678. Real implementations exist only for Linux so far.
2894 Implemented by Ulrich Drepper.
2896 * nscd can now cache entries persistently. Expiring entries are reloaded.
2897 For speedups the cache can be shared in memory with client processes.
2898 Implemented by Ulrich Drepper.
2900 * nscd can now perform SELinux checks.
2901 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2903 * getaddrinfo queries are now cached. Canonical name lookup is performed
2905 Implemented by Ulrich Drepper.
2907 * The nothrow function attribute is used when headers are used by gcc when
2908 compiling C code. This can avoid significant amounts of exception
2911 * The malloc functions perform more error checking and are stricter when
2912 it comes to reacting on errors. The default action is to terminate
2913 the process after showing an error message. Implemented by Ulrich Drepper.
2915 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2916 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2918 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2919 namespaces using the new function dlmopen(). This feature is of course,
2920 like most other dynamic loading functionality, not available in statically
2921 linked applications. Implemented by Ulrich Drepper.
2923 * Low-overhead boundary checking variants of string and some stdio functions
2924 were added. These are to be used in conjunction with a gcc patch by
2925 Jakub Jelinek which adds calls to these functions if possible.
2926 Implemented by Jakub Jelinek and Ulrich Drepper.
2928 * Old code for several operating systems and machine architectures that
2929 have not been in working condition in a long time have been removed from
2930 the main source tree maintained by the GNU C Library's maintainers.
2931 These files are now reside in the separate `ports' source module
2932 that is usable as an add-on when building the library.
2936 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2937 interrogate the dynamic linker, compatible with the Solaris interface.
2939 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2940 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2942 * getifaddrs now uses the netlink interface on Linux to get its information.
2943 Implemented by Thorsten Kukuk.
2945 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2946 Implemented by Ulrich Drepper.
2948 * support for non-executable stacks on x86 has been added. Changes mostly
2951 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2954 * getaddrinfo now performs destination address selection according to
2959 * Thread-safe interfaces for many functions that access locale data
2960 were added in version 2.3, but these features were omitted from NEWS.
2961 Many functions have variants with an `_l' suffix that take a `locale_t'
2962 object as a parameter rather than consulting the current locale.
2963 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2964 create and maintain `locale_t' objects. Additionally, the new function
2965 `uselocale' sets "the current locale" (as used by functions not so
2966 parameterized) set for an individual thread. These features were added
2967 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2969 * The functions getresuid, getresgid, setresuid, and setresgid, which
2970 have long been available on Linux, are now declared in <unistd.h>
2971 and are now also available on the Hurd.
2973 * ELF thread-local storage support (TLS) now works on x86-64.
2975 * The new dynamic string token $LIB is expanded in shared library names.
2976 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2978 * Aldy Hernandez contributed complete software floating point support for
2979 PowerPC machines with no FPU.
2981 * fexecve is implemented on Linux.
2983 * The `btowc' function should work at least twice as fast due to
2984 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2986 * With approriate thread add-ons cancelable functions are now implemented
2987 in libc.so as well. No need to call the function in libpthread. This
2988 change allowed to finally disable the incorrect and expensive handling
2989 of weak definition in ld.so.
2991 * Yet more PLT entries in libc.so have been removed. We finally arrived
2992 at the bare minimum. Startup times improved appropriately.
2994 * Support for the new Linux/x86 system call interface was added. The
2995 AT_SYSINFO auxiliary vector entry is recognized and handled.
2999 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
3002 * iconv (the program and the interface) now accepts empty names (excluding
3003 options like //TRANSLIT) to mean "use charset of current locale".
3005 * localedef can now transliterate characters in strings which are not in
3006 the provided charmap. The information from the input locale is used.
3008 * Prelinking support was added for ELF targets. This requires additional
3009 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
3011 * Read-only stdio streams now use mmap to speed up operation by eliminating
3012 copying and buffer underflows. To use add 'm' to the mode string of
3013 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
3015 * The malloc functions were completely rewritten by Wolfram Gloger based
3016 on Doug Lea's malloc-2.7.0.c.
3018 * Isamu Hasegawa contributed a completely new and POSIX-conformant
3019 implementation of regex.
3021 * Bruno Haible upgraded the iconv and locale implementation to support
3024 * Contents of the LC_* and LANG environment variables in the CEN style are
3025 not recognized anymore. It never was used. Change by Ulrich Drepper.
3027 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
3028 thread-local storage (TLS) ABI on some platforms.
3029 Changes by Ulrich Drepper. SH support by Kaz Kojima.
3031 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
3032 EUC-JISX0213, and TSCII.
3034 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
3035 BSD-compatible interface for getting all network interface addresses.
3036 Implementation for IPv4 by Roland McGrath.
3038 * Loading of locale data is faster due to the introduction of a locale
3039 archive. Implemented by Roland McGrath and Ulrich Drepper.
3041 * Startup times are significantly reduced by not using exported functions
3042 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
3045 * Steven Munroe contributed a port to PowerPC64/Linux.
3049 * The Hurd now uses the GNU libio implementation of stdio rather than the
3050 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
3052 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
3053 with the same behavior as the Linux system call of the same name.
3057 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
3058 128-bit long double format.
3060 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
3061 IBM1161, and IBM1162 charsets.
3063 * Andreas Jaeger contributed a port to x86-64/Linux.
3065 * Peter Bruin contributed a port to PowerPC/Hurd.
3067 * libc functions using I/O streams now can handle wide-oriented streams
3070 * optimizations in the dynamic linker. Binaries created by recent binutils
3071 versions start up quicker due to reduced time spent on relocations.
3073 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
3077 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
3078 asinh, atanh, j0 for the 128-bit long double format.
3080 * Bruno Haible updated all the code handling Unicode in some form to
3081 support Unicode 3.1.
3083 * Speed of regex for single-byte locales is back to previous levels.
3084 Patch by Isamu Hasegawa.
3086 * Alpha, SPARC, and IA-64 now also using floating stacks.
3088 * Startup time of internationalized applications greatly improved through
3089 iconv cache. Use iconvconfig to generate the cache file.
3090 Contributed by Ulrich Drepper.
3092 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
3093 severe performance problems. Patch by David Mosberger.
3095 * The Hurd port got a lot more functionality like AIO, various stdio
3096 extensions, etc. Mainly done by Roland McGrath.
3098 * mtrace can now lookup symbols in shared libraries.
3102 * Intel's IA-64 math library is largely integrated. It provides fast and
3103 accurate implementatations for most basic and standard math functions
3104 in float, double, and long double format.
3106 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
3107 and asin for the 96-bit long double format and asin, log, tan for the
3108 128-bit long double format.
3110 * The beginning of a last-bit accurate math library by IBM Haifa were added.
3111 The basic double functions exist today. Contributed by Abraham Ziv
3112 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
3113 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
3115 * An asynchronous name lookup library was added. The interface is designed
3116 after POSIX AIO. The proposal was circulated beforehand to get comments.
3117 No negative ones came in. Implemented by Ulrich Drepper.
3119 * Port to S390/64bit contributed by Martin Schwidefsky
3120 <schwidefsky@de.ibm.com>.
3122 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3123 of functions for Linux/IA-64.
3125 * The RPC code is now thread safe. Threads can now use the same service
3126 of different services at the same time. Patch by Eric Norum
3127 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3129 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3130 family of functions for Linux/S390.
3132 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3133 of functions for Linux/x86.
3135 * Port to Linux/CRIS contributed by Axis Communications.
3139 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3140 we can now check for namespace violations and missing declarations. The
3141 result is that almost all headers are now Unix-compliant (as defined in
3142 the upcoming XPG6). The negative side is that some programs might need
3143 corrections, too, if they depend on the incorrect form of the headers in
3144 previous versions which defined too many symbols and included too many
3147 * regex now handles multibyte character sets correctly.
3148 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3150 * iconv (the program) does now conform to the upcoming XPG6 and handles
3151 charmaps. Instead of the charset names the path of charmaps can be
3152 provided and the conversion happens based on this data.
3153 Contributed by Ulrich Drepper.
3155 * The locale program now provides detailed information about the installed
3160 only lists the names of the supported locales
3164 provides details such as country, language, and codeset name.
3165 Contributed by Ulrich Drepper.
3169 * The gencat program now parses the input file according to the charset
3170 selected by the LC_CTYPE category. This is important for stateful
3171 character sets. To make generating catalogs easier there is a way
3172 to overwrite the charset selected by the locale: before the first
3173 message or $ quote line the catalog can contain a line like
3175 $ codeset=ISO-8859-2
3177 to select the charset (ISO-8859-2 in this case).
3179 Implemented by Shinya Hanataka and Ulrich Drepper.
3181 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3182 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3183 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3185 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3186 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3188 * The LANGUAGE environment variable is now ignored unless the locale is
3189 changed from the default "C" locale.
3191 * The usual bug fixes.
3195 * Greg McGary added runtime support for bounds checking using gcc's
3196 new -fbounded-pointers option. ix86 target is complete. PowerPC
3199 * Thorsten Kukuk added secure mode support to nscd.
3201 * The Berkeley db libraries have been removed.
3203 Related, the nss_db module is now in a separate package since it
3204 obviously requires a database library being available.
3206 * Wide character I/O streams implemented by Ulrich Drepper.
3208 * Functions from the extended socket API added by Ulrich Drepper.
3210 * Functions feenableexcept and fedisableexcept to control the
3211 behaviour of individual exceptions have been added by Andreas Jaeger.
3213 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3215 * The resolver code has been updated from bind 8.2.3-T5B which supports
3216 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3219 This change could in some situations effect backward compatibility. Since
3220 now `_res' is a thread-local instead of a global variable, modifying it
3221 in one thread does not have any effect in other threads.
3223 The resolver library was also extended to allow IPv6 as the transport
3224 protocol for the requests. This work was done by Stig Venaas.
3226 * Compatibility code for K&R C compilers has been removed from the
3227 header files. A ISO C compiler is needed to use the library
3228 (conforming to either C89 or C99 standard).
3230 * Complete rewrite of the localedef program to support multibyte character
3231 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3232 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3233 Implemented by Ulrich Drepper.
3235 Bruno Haible significantly improved the generation and use of the data
3236 structures for the wide character tables.
3238 * Plural handling in gettext implemented by Ulrich Drepper.
3240 * The utmp daemon has been removed.
3242 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3244 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3247 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3249 * POSIX barriers implemented by Kaz Kylheku.
3251 * POSIX spawn function family implemented by Ulrich Drepper.
3253 * POSIX spinlocks are now available.
3255 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3257 * the configure option --enable-kernel=X.Y.Z allows to strip out
3258 compatibility for kernel versions before X.Y.Z. This is currently only
3259 implemented for Linux.
3261 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3262 field sin6_scope_id. This means that all programs using IPv6 should be
3263 recompiled. Don't expect binary compatibility with previous glibc
3266 * various conversion modules for IBM character sets contributed by
3269 * IA-64 port by Jes Sorensen and HJ Lu.
3283 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3285 * New xdr functions are added; some rpc functions are now 64bit clean.
3287 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3289 * Fixed known incompatibilities with glibc 2.0.
3291 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3293 * Optimized a number of functions (especially the ELF dynamic loader).
3295 * Update timezone data files.
3297 * lots of charmaps corrections
3299 * some new locale definitions and charmaps
3304 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3305 conform to POSIX member type requirements. Symbol versions have been
3306 adjusted as needed within the library, and for direct use by applications,
3307 but there is potential for problems if third-party libraries use
3308 struct timeval as part of their interface. This does not present
3309 a problem for X and other "essential" system libraries.
3311 * An additional locale model to support C++ Standard Library locale
3312 model and probably more was implemented by Ulrich Drepper.
3314 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3317 * Miles Bader provided the `argp' function family to support hierachical
3318 command line argument parsing, layered on top of getopt.
3320 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3322 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3325 * scanf recognizes the %a and %A format for scanning floating point numbers.
3327 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3328 information and interfaces for the available integer types.
3330 * about 130 new math functions were added to implement the ISO C9x math
3333 * the new header <complex.h> contains definitions of the complex math
3334 functions from ISO C 9X.
3336 * the new header <tgmath.h> defines generic macros to use complex or
3337 real valued functions.
3339 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3341 * Andreas Jaeger provided a test suite for the math library.
3343 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
3345 * Ulrich Drepper added character set conversion functions (iconv).
3347 * Optimized string functions have been added.
3349 * The localedata addon is now part of glibc.
3351 * An implementation of profiling shared libraries was added by Ulrich Drepper.
3353 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
3354 daemon for NSS (nscd).
3356 Missing a better place here are some numbers on improvements. Under
3357 Linux 2.1.125 un-tar-ing the kernel sources takes
3361 using local files 12.19s 6.88s 22.91s
3363 using NIS 13.92s 8.91s 26.34s
3365 using NIS & nscd 10.37s 7.34s 25.30s
3367 using NIS+ 27.57s 30.37s 640.46s
3369 using NIS+ & nscd 10.25s 7.83s 26.51s
3371 using NIS & old nscd [1] 13.83s 8.32s 29.60s
3373 Keep in mind that non-namelookup related operations dominate above times.
3374 It was just a common complain that using NIS+ unpacking the kernel is
3377 [1] The old nscd implementation is not available anymore since it was
3378 distributed with glibc up to version 2.0.98 and thus is now replaced.
3380 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
3382 * Mark Kettenis provided a Hesiod NSS module.
3384 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
3385 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
3387 * rcmd can now handle netgroups (Dick Streefland).
3389 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
3392 * Support for the IPv6 protocol has been added to the socket API, as per the
3393 latest draft standards.
3395 * Support for Linux 2.2 has been added.
3397 * Interface changes relative to the latest 2.0.x release:
3398 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3399 addseverity NEW: Unix98
3400 alphasort64 NEW: LFS
3401 argp_err_exit_status NEW: argp, GNU ext
3402 argp_error NEW: argp, GNU ext
3403 argp_failure NEW: argp, GNU ext
3404 argp_help NEW: argp, GNU ext
3405 argp_parse NEW: argp, GNU ext
3406 argp_program_bug_address NEW: argp, GNU ext
3407 argp_program_version NEW: argp, GNU ext
3408 argp_program_version_hook NEW: argp, GNU ext
3409 argp_state_help NEW: argp, GNU ext
3410 argp_usage NEW: argp, GNU ext
3411 authdes_create NEW: Secure RPC
3412 authdes_getucred NEW: Secure RPC
3413 authdes_pk_create NEW: Secure RPC
3414 backtrace NEW: GNU ext.
3415 backtrace_symbols NEW: GNU ext.
3416 backtrace_symbols_fd NEW: GNU ext.
3418 cacosf NEW: ISO C 9x
3419 cacosh NEW: ISO C 9x
3420 cacoshf NEW: ISO C 9x
3421 cacoshl NEW: ISO C 9x
3422 cacosl NEW: ISO C 9x
3429 casinf NEW: ISO C 9x
3430 casinh NEW: ISO C 9x
3431 casinhf NEW: ISO C 9x
3432 casinhl NEW: ISO C 9x
3433 casinl NEW: ISO C 9x
3435 catanf NEW: ISO C 9x
3436 catanh NEW: ISO C 9x
3437 catanhf NEW: ISO C 9x
3438 catanhl NEW: ISO C 9x
3439 catanl NEW: ISO C 9x
3440 cbc_crypt NEW: Secure RPC
3444 ccoshf NEW: ISO C 9x
3445 ccoshl NEW: ISO C 9x
3451 cimagf NEW: ISO C 9x
3452 cimagl NEW: ISO C 9x
3453 clearerr_locked REMOVED
3454 clntunix_create NEW: sunrpc ext
3456 clog10 NEW: ISO C 9x
3457 clog10f NEW: ISO C 9x
3458 clog10l NEW: ISO C 9x
3468 cprojf NEW: ISO C 9x
3469 cprojl NEW: ISO C 9x
3471 crealf NEW: ISO C 9x
3472 creall NEW: ISO C 9x
3477 csinhf NEW: ISO C 9x
3478 csinhl NEW: ISO C 9x
3481 csqrtf NEW: ISO C 9x
3482 csqrtl NEW: ISO C 9x
3486 ctanhf NEW: ISO C 9x
3487 ctanhl NEW: ISO C 9x
3489 des_setparity NEW: Secure RPC
3490 ecb_crypt NEW: Secure RPC
3491 endutxent NEW: Unix98
3493 exp10f NEW: ISO C 9x
3494 exp10l NEW: ISO C 9x
3498 fattach NEW: STREAMS
3499 fdetach NEW: STREAMS
3503 feclearexcept NEW: ISO C 9x
3504 fegetenv NEW: ISO C 9x
3505 fegetexceptflag NEW: ISO C 9x
3506 fegetround NEW: ISO C 9x
3507 feholdexcept NEW: ISO C 9x
3509 feraiseexcept NEW: ISO C 9x
3510 ferror_locked REMOVED
3511 fesetenv NEW: ISO C 9x
3512 fesetexceptflag NEW: ISO C 9x
3513 fesetround NEW: ISO C 9x
3514 fetestexcept NEW: ISO C 9x
3515 feupdateenv NEW: ISO C 9x
3516 fflush_locked REMOVED
3520 fgets_unlocked NEW: GNU ext.
3521 fileno_locked REMOVED
3533 fputc_locked REMOVED
3534 fputs_unlocked NEW: GNU ext.
3535 fread_unlocked NEW: GNU ext.
3540 fstatvfs NEW: Unix98
3544 ftruncate64 NEW: LFS
3546 fwrite_unlocked NEW: GNU ext.
3547 gai_strerror NEW: IPv6
3551 getchar_locked REMOVED
3553 getdate_err NEW: Unix98
3554 getdate_r NEW: GNU ext.
3556 getnameinfo NEW: IPv6
3557 getnetname NEW: Secure RPC
3558 getpmsg NEW: STREAMS
3559 getpt NEW: Unix98 PTY
3560 getrlimit64 NEW: LFS
3561 getutxent NEW: Unix98
3562 getutxid NEW: Unix98
3563 getutxline NEW: Unix98
3564 glob64 NEW: GNU ext.
3565 globfree64 NEW: GNU ext.
3566 gnu_get_libc_release NEW: GNU ext.
3567 gnu_get_libc_version NEW: GNU ext.
3568 grantpt NEW: Unix98 PTY
3569 host2netname NEW: Secure RPC
3571 iconv_close NEW: iconv
3572 iconv_open NEW: iconv
3573 if_freenameindex NEW: IPv6
3574 if_indextoname NEW: IPv6
3575 if_nameindex NEW: IPv6
3576 if_nametoindex NEW: IPv6
3577 in6addr_any NEW: IPv6
3578 in6addr_loopback NEW: IPv6
3579 inet6_isipv4mapped NEW: IPv6
3580 isastream NEW: STREAMS
3581 iswblank NEW: GNU ext.
3582 key_decryptsession NEW: Secure RPC
3583 key_decryptsession_pk NEW: Secure RPC
3584 key_encryptsession NEW: Secure RPC
3585 key_encryptsession_pk NEW: Secure RPC
3586 key_gendes NEW: Secure RPC
3587 key_get_conv NEW: Secure RPC
3588 key_secretkey_is_set NEW: Secure RPC
3589 key_setnet NEW: Secure RPC
3590 key_setsecret NEW: Secure RPC
3591 llrint NEW: ISO C 9x
3592 llrintf NEW: ISO C 9x
3593 llrintl NEW: ISO C 9x
3594 llround NEW: ISO C 9x
3595 llroundf NEW: ISO C 9x
3596 llroundl NEW: ISO C 9x
3601 lrintf NEW: ISO C 9x
3602 lrintl NEW: ISO C 9x
3603 lround NEW: ISO C 9x
3604 lroundf NEW: ISO C 9x
3605 lroundl NEW: ISO C 9x
3607 makecontext NEW: Unix98
3608 mempcpy NEW: GNU ext.
3611 modify_ldt NEW: kernel
3615 nearbyint NEW: ISO C 9x
3616 nearbyintf NEW: ISO C 9x
3617 nearbyintl NEW: ISO C 9x
3618 netname2host NEW: Secure RPC
3619 netname2user NEW: Secure RPC
3620 nexttoward NEW: ISO C 9x
3621 nexttowardf NEW: ISO C 9x
3622 nexttowardl NEW: ISO C 9x
3626 passwd2des NEW: Secure RPC
3628 pow10f NEW: GNU ext.
3629 pow10l NEW: GNU ext.
3632 printf_size NEW: GNU ext.
3633 printf_size_info NEW: GNU ext.
3634 profil_counter REMOVED
3635 pthread_mutexattr_getkind_np REPLACED
3636 pthread_mutexattr_setkind_np REPLACED
3637 ptsname NEW: Unix98 PTY
3638 ptsname_r NEW: Unix98 PTY
3640 putchar_locked REMOVED
3641 putgrent NEW: GNU ext.
3643 putpmsg NEW: STREAMS
3644 pututxline NEW: Unix98
3648 readdir64_r NEW: LFS
3649 remquo NEW: ISO C 9x
3650 remquof NEW: ISO C 9x
3651 remquol NEW: ISO C 9x
3653 roundf NEW: ISO C 9x
3654 roundl NEW: ISO C 9x
3656 scalbln NEW: ISO C 9x
3657 scalblnf NEW: ISO C 9x
3658 scalblnl NEW: ISO C 9x
3660 sendfile NEW: kernel
3661 setcontext NEW: Unix98
3662 setrlimit64 NEW: LFS
3663 setutxent NEW: Unix98
3665 sigignore NEW: Unix98
3666 sigqueue NEW: POSIX.1b
3667 sigrelse NEW: Unix98
3668 sigset NEW: POSIX.1b
3669 sigtimedwait NEW: POSIX.1b
3670 sigwaitinfo NEW: POSIX.1b
3671 sincos NEW: GNU ext.
3672 sincosf NEW: GNU ext.
3673 sincosl NEW: GNU ext.
3677 strcasestr NEW: GNU ext.
3678 strtoimax NEW: ISO C 9x
3679 strtoumax NEW: ISO C 9x
3680 strverscmp NEW: GNU ext.
3681 svcauthdes_stats NEW: Secure RPC
3682 svcunix_create NEW: sunrpc etx
3683 svcunixfd_create NEW: sunrpc ext
3684 swapcontext NEW: Unix98
3685 tcgetsid NEW: Unix98 PTY
3686 tdestroy NEW: GNU ext.
3687 tgamma NEW: ISO C 9x
3688 tgammaf NEW: ISO C 9x
3689 tgammal NEW: ISO C 9x
3693 truncf NEW: ISO C 9x
3694 truncl NEW: ISO C 9x
3696 unlockpt NEW: Unix98 PTY
3697 updwtmpx NEW: Unix98
3698 user2netname NEW: Secure RPC
3699 utmpxname NEW: Unix98
3700 versionsort NEW: GNU ext.
3701 versionsort64 NEW: GNU ext.
3703 wcscasecmp NEW: GNU ext.
3704 wcsncasecmp NEW: GNU ext.
3705 wcsnlen NEW: GNU ext.
3706 wcstoimax NEW: ISO C 9x
3707 wcstoll NEW: ISO C 9x
3708 wcstoull NEW: ISO C 9x
3709 wcstoumax NEW: ISO C 9x
3711 wordexp NEW: POSIX.2
3712 wordfree NEW: POSIX.2
3713 write_profiling REMOVED
3714 xdecrypt NEW: Secure RPC
3715 xdr_authdes_cred NEW: Secure RPC
3716 xdr_authdes_verf NEW: Secure RPC
3717 xdr_cryptkeyarg NEW: Secure RPC
3718 xdr_cryptkeyarg2 NEW: Secure RPC
3719 xdr_cryptkeyres NEW: Secure RPC
3720 xdr_getcredres NEW: Secure RPC
3721 xdr_key_netstarg NEW: Secure RPC
3722 xdr_key_netstres NEW: Secure RPC
3723 xdr_keybuf NEW: Secure RPC
3724 xdr_keystatus NEW: Secure RPC
3725 xdr_netnamestr NEW: Secure RPC
3726 xdr_sizeof NEW: Secure RPC
3727 xdr_unixcred NEW: sunrpc ext
3728 xencrypt NEW: Secure RPC
3729 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3740 * inet_ntoa is thread-safe
3742 * updwtmp is moved from libutil to libc
3744 * rewrite of cbrt function
3746 * update of timezone data
3760 * add atoll function
3762 * fix complex problems in Berkeley DB code
3764 * fix math functions
3768 * fixed lots of header problems (especially Linux/GNU specific)
3770 * dynamic loader preserves all registers
3772 * Roland McGrath provided support for handling of auxiliary objects in
3773 the ELF dynamic loader.
3775 * support for parallel builds is improved
3779 * GNU extensions are no longer declared by default. To enable them you
3780 must define the macro `_GNU_SOURCE' in your program or compile with
3783 * The library has changed from using GNU ld symbol aliases to using weak
3784 symbols where available. The ELF object file format supports weak
3785 symbols; GNU ld also supports weak symbols in the a.out format. (There
3786 is also now support for other GNU ld extensions in ELF. Use the
3787 `--with-elf' option to configure to indicate you have ELF, and
3788 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3789 of many files which contained only symbol aliases, reducing the size of
3790 the source and the compiled library; many other files were renamed to
3791 less cryptic names previously occupied by the symbol alias files.
3792 There is a new header file <elf.h> for programs which operate on
3793 files in the ELF format.
3795 * Converted to Autoconf version 2, so `configure' has more options.
3796 Run `configure --help' to see the details.
3798 * The library can now be configured to build profiling, highly-optimized
3799 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3800 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3801 `configure' enable building these extra libraries. The shared library is
3802 built by default when using both ELF and GNU ld. When shared libraries
3803 are enabled, the new library `-ldl' is available for arbitrary run-time
3804 loading of shared objects; its interface is defined in <dlfcn.h>. The
3805 new header file <link.h> gives access to the internals of the run-time
3806 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3807 application of same name on other systems and it provides information
3808 about dynamically linked binaries.
3810 * The C library now provides the run-time support code for profiling
3811 executables compiled with `-pg'. Programs can control the profiling code
3812 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3813 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3814 the support for this file format was contributed by David Mosberger-Tang.
3816 * The math code has been replaced with a math library based on fdlibm from
3817 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3818 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3819 functions. The math functions now reside in a separate library, so
3820 programs using them will need to use `-lm' their linking commands.
3822 * John C. Bowman contributed optimized ix87 assembler inline functions.
3824 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3825 mechanism similar to that found in Solaris 2. This is now used for the
3826 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3827 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3828 file controls what services are used for each individual database. This
3829 works by loading shared libraries with names specified in `nsswitch.conf',
3830 so service modules can be changed or added at any time without even
3831 relinking any program. Currently there are the file, db, and NIS based
3832 NSS services available.
3834 * The new functions `strtoq' and `strtouq' parse integer values from
3835 strings, like `strtol' and `strtoul', but they return `long long int' and
3836 `unsigned long long int' values, respectively (64-bit quantities).
3838 * The new functions `strtof' and `strtold' parse floating-point values from
3839 strings, like `strtod', but they return `float' and `long double' values,
3840 respectively (on some machines `double' and `long double' are the same).
3842 * Ulrich Drepper has contributed new implementations of the floating-point
3843 printing and reading code used in the `printf' family of functions and
3844 `strtod', `strtof', and `strtold'. These new functions are perfectly
3845 accurate, and much faster than the old ones.
3847 * The implementation of the POSIX locale model was completely rewritten by
3848 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3849 to compile the POSIX locale definition.
3851 * The former dummy implementations of the strcoll and strxfrm function are
3852 now replaced by fully functional code contributed by Ulrich Drepper. The
3853 collation information comes from the POSIX locale definitions.
3855 * The new header <langinfo.h> defines an interface for accessing
3856 various locale-dependent data (using the locale chosen with `setlocale').
3858 * Ulrich Drepper has contributed a new suite of functions for operation on
3859 wide-character and multibyte-character strings, in <wchar.h>;
3860 and classification and case conversion of wide characters, in <wctype.h>.
3861 These new functions are conforming to the ISO C, Amendement 1 specification.
3863 * There is now a second implementation of the standard I/O library available.
3864 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3865 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3867 * You can now use positional parameter specifications in format strings
3868 for the `printf' and `scanf' families of functions. For example,
3869 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3870 ``Number 6, Mr Jones''. This is mainly useful when providing different
3871 format strings for different languages, whose grammars may dictate
3872 different orderings of the values being printed. To support this
3873 feature, the interface for `register_printf_handler' has changed; see
3874 the header file <printf.h> for details.
3876 * The `printf' and `scanf' families of functions now understand a new
3877 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3878 to group numbers as indicated by the locale; for `scanf' and friends, this
3879 says to accept as valid only a number with all the proper grouping
3880 separators in the right places. In the default "C" locale, numbers are
3881 not grouped; but locales for specific countries will define the usual
3882 conventions (i.e. separate thousands with `,' in the US locale).
3884 * The pgrp functions have been regularized, slightly incompatibly but much
3885 less confusingly. The core functions are now `getpgid' and `setpgid',
3886 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3887 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3888 provided for compatibility. There is no longer an incompatible `getpgrp'
3889 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3891 * The new header file <fts.h> and suite of functions simplify programs that
3892 operate on directory trees. This code comes from 4.4 BSD.
3894 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3895 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3896 NSS scheme used in glibc.
3898 * There is a new malloc debugging hook `__memalign_hook'.
3900 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3901 `unsigned int' in <sys/types.h>. These are for compatibility only and
3902 their use is discouraged.
3904 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3905 done differently, so that it works even without GNU ld.
3907 * New function `euidaccess' checks allowed access to a file like `access',
3908 but using the effective IDs instead of the real IDs.
3910 * The time zone data files have been updated for the latest and greatest
3911 local time conventions of the countries of the world.
3913 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3916 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3917 for formatting floating-point numbers. They are provided only for
3918 compatibility; new programs should use `sprintf' instead. There are
3919 also equivalent function for the `long double' floating-point type and
3920 all functions also exist in a reentrant form.
3922 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3923 functions for maintaining the login-record files (primarily of use to
3924 system programs such as `login'), and convenient functions for
3925 allocating and initializing a pseudo-terminal (pty) device.
3927 * Ulrich Drepper has contributed new support for System V style
3928 shared memory and IPC on systems that support it.
3930 * Ulrich Drepper has contributed several miscellaneous new functions found
3931 in System V: The `hsearch' family of functions provide an effective
3932 implementation of hash tables; `a64l' and `l64a' provide a very simple
3933 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3936 * Ulrich Drepper has contributed new reentrant counterparts for the
3937 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3939 * Ulrich Drepper has contributed new, highly-optimized versions of several
3940 string functions for the i486/Pentium family of processors.
3942 * Ulrich Drepper has updated the Linux-specific code, based largely
3943 on work done in Hongjiu Lu's version of GNU libc for Linux.
3944 The GNU library now supports Linux versions 2.0.10 and later,
3945 using the ELF object file format (i[3456]86-*-linux).
3947 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3949 * David Mosberger-Tang and Richard Henderson have ported the C library
3950 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3951 dynamic linking support for ELF/Alpha.
3953 * Richard Henderson contributed several Alpha optimized assembler function
3954 for arithmetic and string handling.
3956 * Ulrich Drepper has contributed a new set of message catalog functions to
3957 support multiple languages using the <libintl.h> interface, for use with
3958 his new package GNU gettext. Translation volunteers have contributed
3959 catalogs of the library's messages in Spanish, German, and Korean.
3961 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3962 program and the `catgets' function for reading the catalog files it
3963 creates. (The <libintl.h> interface is preferred; we include the
3964 <nl_types.h> interface using `catgets' only for source compatibility with
3965 programs already written to use it.)
3967 * New header file <values.h> gives SVID-compatible names for <limits.h>
3970 * Various new macros, declarations, and small header files for compatibility
3973 * New function `group_member' is a convenient way to check if a process has
3974 a given effective group ID.
3976 * When using GCC 2.7 and later, the socket functions are now declared in a
3977 special way so that passing an argument of type `struct sockaddr_in *',
3978 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3979 `struct sockaddr *' type, does not generate a type-clash warning.
3981 * New function `error' declared in header file <error.h> is a convenient
3982 function for printing error messages and optionally exiting; this is the
3983 canonical function used in GNU programs. The new functions `err', `warn',
3984 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3985 doing the same thing.
3987 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3988 POSIX.2 `glob' function to do ~ and {...} expansion.
3990 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3991 `clearenv' which is used in POSIX.9 is also available.
3993 * New function `getsid' returns session ID number on systems that support it.
3995 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3996 files <db.h> and <mpool.h> provide a rich set of functions for several
3997 types of simple databases stored in memory and in files, and <ndbm.h> is
3998 an old `ndbm'-compatible interface using the `db' functions. Link with
3999 `-ldb' to get these functions.
4001 * New macro `strdupa' copies a string like `strdup', but uses local stack
4002 space from `alloca' instead of dynamic heap space from `malloc'.
4004 * New function `strnlen' is like `strlen' but searches only a given maximum
4005 number of characters for the null terminator. `stpncpy', `strndup' and
4006 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
4009 * New function `statfs' in header <sys/statfs.h>.
4011 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
4012 provide convenient functions for operating on blocks of null-terminated
4015 * A new suite of functions in <utmp.h> handle all the details of reading
4016 and writing the utmp file.
4018 * An implementation of the NIS/YP(tm) based NSS service was contributed by
4021 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
4022 completely POSIX compliant and also implemented the extended functionality
4023 to handle alternate digit representation and alternate era date formats.
4025 * Ulrich Drepper provided an implementation of the `strptime' function
4026 defined in XPG4.2 which transforms a string into a `struct tm' value.
4028 * Paul Eggert provided the tzselect shell script as part of the timezone
4029 code. The shell script makes it easy to select the correct timezone
4032 * The implementation of the malloc family of functions is completely replaced
4033 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
4034 The implementation uses the mmap function (if available) and it is
4035 optimized for the use in multi threaded programs.
4037 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
4038 functions. This new functionality is usable by specifying a special
4039 salt string and it is compatible with implementation on *BSD systems.
4041 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
4042 `getsubopt' to handle second level command line options, `bsd_signal'
4043 to access BSD style `signal' functionality, the obsolete `regexp' style
4046 * the `lchown' function is available on system which support this
4049 * The implementation of the shadow password handling function was contributed
4052 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
4054 * POSIX.1g support was added. The <sys/select.h> header is available,
4055 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
4056 implementation of `getaddrinfo'.
4060 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
4062 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
4063 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
4065 * The new function `daemon' from 4.4 BSD is useful for server programs that
4066 want to put themselves in the background.
4068 * Joel Sherrill has contributed support for several standalone boards that
4069 run without an operating system.
4071 * `printf', `scanf' and friends now accept a `q' type modifier for long
4072 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
4074 * All of the code taken from BSD (notably most of the math and networking
4075 routines) has been updated from the BSD 4.4-Lite release.
4077 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
4079 * The new functions `getdomainname' and `setdomainname' fetch or change the
4080 YP/NIS domain name. These are system calls which exist on systems which
4083 * The time zone data files have been updated for the latest international
4086 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
4087 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
4091 * The C library now includes support for Sun RPC, from Sun's free
4092 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
4093 are included. (There is still no support for YP.)
4095 * Tom Quinn has contributed a port of the C library to SGI machines running
4096 Irix 4 (mips-sgi-irix4).
4098 * The new `lockf' function is a simplified interface to the locking
4099 facilities of `fcntl', included for compatibility.
4101 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
4103 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
4105 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
4108 * The error message printed by `assert' for a failed assertion now includes
4109 the name of the program (if using GNU ld) and the name of the calling
4110 function (with versions of GCC that support this).
4112 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
4114 * The library now includes the <sys/mman.h> header file and memory
4115 management functions `mmap', `munmap', `mprotect', `msync', and
4116 `madvise', on systems that support those facilities.
4118 * The interface for `mcheck' has changed slightly: the function called to
4119 abort the program when an allocation inconsistency is detected now takes
4120 an argument that indicates the type of failure. The new function
4121 `mprobe' lets you request a consistency check for a particular block at
4122 any time (checks are normally done only when you call `free' or `realloc'
4125 * It is now possible to easily cross-compile the C library, building on one
4126 system a library to run on another machine and/or operating system. All
4127 you need to do is set the variable `HOST_CC' in `configparms' to the
4128 native compiler for programs to run on the machine you are building on (a
4129 few generator programs are used on Unix systems); set `CC' to the
4132 * The new function `fexecve' (only implemented on the GNU system) executes
4133 a program file given a file descriptor already open on the file.
4137 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4138 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4140 * You can set the variable `libprefix' in `configparms' to specify a prefix
4141 to be prepended to installed library files; this makes it easy to install
4142 the GNU C library to be linked as `-lgnuc' or whatever.
4144 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4145 copies a limited number of characters from a string, and returns the
4146 address of the last character written.
4148 * You no longer need to check for whether the installed `stddef.h' is
4149 compatible with the GNU C library. configure now checks for you.
4151 * You can now define a per-stream `fileno' function to convert the
4152 stream's cookie into an integral file descriptor.
4154 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4155 allocates zero bytes of storage, and returns a unique pointer which
4156 you can pass to `realloc' or `free'. The behavior is undefined if
4157 you dereference this pointer.
4159 * The C library now runs on Sony NEWS m68k machines running either
4160 NewsOS 3 or NewsOS 4.
4162 * The new `syscall' function is a system-dependent primitive function
4163 for invoking system calls. It has the canonical behavior on Unix
4164 systems, including unreliable return values for some calls (such as
4165 `pipe', `fork' and `getppid').
4167 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4168 to `EAGAIN', which is the preferred name. On systems whose kernels
4169 use two distinct codes, the C library now translates EWOULDBLOCK to
4170 EAGAIN in every system call function.
4174 * The GNU C Library Reference Manual is now distributed with the library.
4175 `make dvi' will produce a DVI file of the printed manual.
4176 `make info' will produce Info files that you can read on line using C-h i
4177 in Emacs or the `info' program.
4178 Please send comments on the manual to bug-glibc-manual@gnu.org.
4180 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4182 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4184 * Jason Merrill has contributed a port to the Sequent Symmetry running
4185 Dynix version 3 (i386-sequent-dynix).
4187 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4188 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4190 * New function `memory_warnings' lets you arrange to get warnings when
4191 malloc is running out of memory to allocate, like Emacs gives you.
4193 * The C library now contains the relocating allocator used in Emacs 19 for
4194 its editing buffers. This allocator (ralloc) minimizes allocation
4195 overhead and fragmentation by moving allocated regions around whenever it
4196 needs to. You always refer to a ralloc'd region with a "handle" (a
4197 pointer to a pointer--an object of type `void **').
4199 * There is a new `printf' format: `%m' gives you the string corresponding
4200 to the error code in `errno'.
4202 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4203 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4204 pass, the `a' modifier says to fill in a `char **' you pass with a
4207 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4208 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4209 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4211 * `mkstemp' is a traditional Unix function to atomically create and open a
4212 uniquely-named temporary file.
4216 * The standard location for the file that says what the local timezone is
4217 has changed again. It is now `/usr/local/etc/localtime' (or more
4218 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4220 * The distribution no longer contains any files with names longer than 14
4223 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4224 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4226 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4230 * The configuration process has changed quite a bit. The `configure'
4231 script is now used just like the configuration scripts for other GNU
4232 packages. The `sysdeps' directory hierarchy is much rearranged.
4233 The file `INSTALL' explains the new scheme in detail.
4235 * The header files no longer need to be processed into ANSI C and
4236 traditional C versions. There is just one set of files to install, and
4237 it will work with ANSI or old C compilers (including `gcc -traditional').
4239 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4240 MIPS DECStation running Ultrix 4.
4242 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4243 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4244 made itself into a shared library.
4246 * Yet further improved support for the i386, running 4.3 BSD-like systems
4247 (such as Mach 3 with the Unix single-server), or System V.
4249 * New function `strncasecmp' to do case-insensitive string comparison
4250 with limited length.
4252 * New function `strsep' is a reentrant alternative to `strtok'.
4254 * New functions `scandir' and `alphasort' for searching directories.
4256 * New function `setenv' is a better interface to `putenv'.
4258 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4259 function for traversing a directory tree.
4261 * The GNU obstack package is now also part of the C library.
4262 The new function `open_obstack_stream' creates a stdio stream that
4263 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4264 formatted output directly to an obstack.
4266 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4267 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4269 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4271 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4272 things to your strings.
4274 * There are some new test programs: test-fseek, testmb, and testrand.
4276 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4277 These ports are not finished, but are a good starting place for really
4278 supporting those systems.
4280 * `/etc/localtime' is now the standard location for the file that says what
4281 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4282 This follows the general principle that `/etc' is the place for all local
4283 configuration files.
4285 * The C library header files now use `extern "C"' when used by the C++
4286 compiler, so the C library should now work with C++ code.
4288 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4289 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4292 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4293 function which uses the `merge sort' algorithm, and is said to be
4294 significantly faster than the old GNU `qsort' function. Merge sort is
4295 now the standard `qsort' function. The new algorithm can require a lot
4296 of temporary storage; so, the old sorting function is called when the
4297 required storage is not available.
4299 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4300 provides the Unix `crypt' function, plus some other entry points.
4302 * The code and header files taken from 4.4 BSD have been updated with the
4303 latest files released from Berkeley.
4305 ----------------------------------------------------------------------
4306 Copyright information:
4308 Copyright (C) 1992-2017 Free Software Foundation, Inc.
4310 Permission is granted to anyone to make or distribute verbatim copies
4311 of this document as received, in any medium, provided that the
4312 copyright notice and this permission notice are preserved,
4313 thus giving the recipient permission to redistribute in turn.
4315 Permission is granted to distribute modified versions
4316 of this document, or of portions of it,
4317 under the above conditions, provided also that they
4318 carry prominent notices stating who last changed them.
4321 version-control: never