1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2018 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 executables 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 and x32 with binutils 2.29 or later, and on
20 aarch64 with binutils 2.30 or later.
22 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
23 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
26 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
28 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
30 * In order to support faster and safer process termination the malloc API
31 family of functions will no longer print a failure address and stack
32 backtrace after detecting heap corruption. The goal is to minimize the
33 amount of work done after corruption is detected and to avoid potential
34 security issues in continued process execution. Reducing shutdown time
35 leads to lower overall process restart latency, so there is benefit both
36 from a security and performance perspective.
38 * The abort function terminates the process immediately, without flushing
39 stdio streams. Previous glibc versions used to flush streams, resulting
40 in deadlocks and further data corruption. This change also affects
41 process aborts as the result of assertion failures.
43 * On platforms where long double has the IEEE binary128 format (aarch64,
44 alpha, mips64, riscv, s390 and sparc), the math library now implements
45 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
46 These are the same interfaces added in version 2.26 for some platforms where
47 this format is supported but is not the format of long double.
49 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
50 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
51 implements interfaces for that type, as defined by ISO/IEC TS
52 18661-3:2015. These are corresponding interfaces to those supported for
55 * The math library now implements interfaces for the _Float32, _Float64 and
56 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
57 corresponding interfaces to those supported for _Float128.
59 * glibc now implements the memfd_create and mlock2 functions on Linux.
61 * Support for memory protection keys was added. The <sys/mman.h> header now
62 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
65 * The copy_file_range function was added.
67 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
69 * The ldconfig utility now processes `include' directives using the C/POSIX
70 collation ordering. Previous glibc versions used locale-specific
71 ordering, the change might break systems that relied on that.
73 * Support for two grammatical forms of month names has been added.
74 In a call to strftime, the "%B" and "%b" format specifiers will now
75 produce the grammatical form required when the month is used as part
76 of a complete date. New "%OB" and "%Ob" specifiers produce the form
77 required when the month is named by itself. For instance, in Greek
78 and in many Slavic and Baltic languages, "%B" will produce the month
79 in genitive case, and "%OB" will produce the month in nominative case.
81 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
82 are all valid and will all accept any known form of month
83 name---standalone or complete, abbreviated or full. In a call to
84 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
85 the strings used by "%B" and "%b", respectively. New query
86 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
87 used by "%OB" and "%Ob", respectively.
89 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
90 define the strings for %OB and %Ob, respectively; these have the
91 same syntax as "mon" and "abmon". These arrays are optional; if they
92 are not provided then they have the same content as "mon" and "abmon",
95 These features are provided for locales which define "alt_mon" and/or
96 "ab_alt_mon" in their locale source data. This release includes such
97 alternative month name data for the following languages: Belarusian,
98 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
100 This feature is currently a GNU extension, but it is expected to
101 be added to the next revision of POSIX, and it is also already
102 available on some BSD-derived operating systems.
104 This feature will cause existing statically compiled applications
105 to fail to load locales and fall back to the builtin C/POSIX locales.
106 See notes below for other changes affecting compatibility.
108 * Support for the RISC-V ISA running on Linux has been added. This port
109 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
110 for the following ISA and ABI pairs:
116 Deprecated and removed features, and other changes affecting compatibility:
118 * Statically compiled applications attempting to load locales compiled for the
119 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
120 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
121 support for two grammatical forms of the month names, also extends the locale
122 data binary format. Static applications needing locale support must be
123 recompiled to match the runtime and data they are deployed with. In some
124 distributions there is an upgrade window where dynamically linked applications
125 may use a new library but the old locale data and also fall back to the
126 builtin C/POSIX locales; restarting the application process is sufficient to
129 * Support for statically linked applications which call dlopen is deprecated
130 and will be removed in a future version of glibc. Applications which call
131 dlopen need to be linked dynamically instead.
133 * Support for old programs which use internal stdio data structures and
134 functions is deprecated. This includes programs which use the C++ streams
135 provided by libstdc++ in GCC 2.95. Programs which use the internal
136 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
137 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
138 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
139 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
140 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
141 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
142 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
143 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
144 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
145 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
146 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
147 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
148 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
149 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
150 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
151 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
152 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
153 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
154 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
155 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
156 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
157 future version of glibc. Unlike other symbol removals, these old
158 applications will not be supported using compatibility symbols.
160 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
161 defined by <sys/ptrace.h>.
163 * libm no longer supports SVID error handling (calling a user-provided
164 matherr function on error) or the _LIB_VERSION variable to control error
165 handling. (SVID error handling and the _LIB_VERSION variable still work
166 for binaries linked against older versions of the GNU C Library.) The
167 libieee.a library is no longer provided. math.h no longer defines struct
168 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
169 TLOSS, PLOSS and HUGE.
171 * The libm functions pow10, pow10f and pow10l are no longer supported for
172 new programs. Programs should use the standard names exp10, exp10f and
173 exp10l for these functions instead.
175 * The mcontext_t type is no longer the same as struct sigcontext. On
176 platforms where it was previously the same, this changes the C++ name
177 mangling for interfaces involving this type.
179 * The add-ons mechanism for building additional packages at the same time as
180 glibc has been removed. The --enable-add-ons configure option is now
183 * The --without-fp configure option is now ignored. Whether hardware
184 floating-point instructions are used is now configured based on whether
185 the compiler used at configure time (without any options implied by a
186 --with-cpu= configure option) uses such instructions.
188 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
189 the specified string can be parsed as a domain name.
191 * In the malloc_info output, the <heap> element may contain another <aspace>
192 element, "subheaps", which contains the number of sub-heaps.
194 * The libresolv function p_secstodate is no longer supported for new
197 * The tilepro-*-linux-gnu configuration is no longer supported.
199 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
200 and will be removed in a future release. Software that is still using
201 either header should be updated to use standard <stdio.h> interfaces
204 libio.h was originally the header for a set of supported GNU extensions,
205 but they have not been maintained as such in many years, they are now
206 standing in the way of improvements to stdio, and we don't think there are
207 any remaining external users. _G_config.h was never intended for public
208 use, but predates the bits convention.
210 Changes to build and runtime requirements:
212 * bison version 2.7 or later is required to generate code in the 'intl'
215 Security related changes:
217 CVE-2009-5064: The ldd script would sometimes run the program under
218 examination directly, without preventing code execution through the
219 dynamic linker. (The glibc project disputes that this is a security
220 vulnerability; only trusted binaries must be examined using the ldd
223 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
224 suffered from a one-byte overflow during ~ operator processing (either
225 on the stack or the heap, depending on the length of the user name).
226 Reported by Tim Rühsen.
228 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
229 would sometimes fail to free memory allocated during ~ operator
230 processing, leading to a memory leak and, potentially, to a denial
233 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
234 without GLOB_NOESCAPE, could write past the end of a buffer while
235 unescaping user names. Reported by Tim Rühsen.
237 CVE-2017-17426: The malloc function, when called with an object size near
238 the value SIZE_MAX, would return a pointer to a buffer which is too small,
239 instead of NULL. This was a regression introduced with the new malloc
240 thread cache in glibc 2.26. Reported by Iain Buclaw.
242 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
243 to the allocation of too much memory. (This is not a security bug per se,
244 it is mentioned here only because of the CVE assignment.) Reported by
247 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
248 of the number of search path components. (This is not a security
249 vulnerability per se because no trust boundary is crossed if the fix for
250 CVE-2017-1000366 has been applied, but it is mentioned here only because
251 of the CVE assignment.) Reported by Qualys.
253 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
254 for AT_SECURE or SUID binaries could be used to load libraries from the
257 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
258 succeeds without returning an absolute path due to unexpected behaviour
259 of the Linux kernel getcwd syscall. Reported by halfdog.
261 CVE-2018-6485: The posix_memalign and memalign functions, when called with
262 an object size near the value of SIZE_MAX, would return a pointer to a
263 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
265 The following bugs are resolved with this release:
267 [The release manager will add the list generated by
268 scripts/list-fixed-bugs.py just before the release.]
275 * A per-thread cache has been added to malloc. Access to the cache requires
276 no locks and therefore significantly accelerates the fast path to allocate
277 and free small amounts of memory. Refilling an empty cache requires locking
278 the underlying arena. Performance measurements show significant gains in a
279 wide variety of user workloads. Workloads were captured using a special
280 instrumented malloc and analyzed with a malloc simulator. Contributed by
281 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
283 * Unicode 10.0.0 Support: Character encoding, character type info, and
284 transliteration tables are all updated to Unicode 10.0.0, using
285 generator scripts contributed by Mike FABIAN (Red Hat).
286 These updates cause user visible changes, especially the changes in
287 wcwidth for many emoji characters cause problems when emoji sequences
288 are rendered with pango, see for example:
289 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
291 * Collation of Hungarian has been overhauled and is now consistent with "The
292 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
295 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
297 - The GNU C Library will now detect when /etc/resolv.conf has been
298 modified and reload the changed configuration. The new resolver option
299 “no-reload” (RES_NORELOAD) disables this behavior.
301 - The GNU C Library now supports an arbitrary number of search domains
302 (configured using the “search” directive in /etc/resolv.conf);
303 previously, there was a hard limit of six domains. For backward
304 compatibility, applications that directly modify the ‘_res’ global
305 object are still limited to six search domains.
307 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
308 Library will now randomly pick a name server from the configuration as a
309 starting point. (Previously, the second name server was always used.)
311 * The tunables feature is now enabled by default. This allows users to tweak
312 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
314 * New function reallocarray, which resizes an allocated block (like realloc)
315 to the product of two sizes, with a guaranteed clean failure upon integer
316 overflow in the multiplication. Originally from OpenBSD, contributed by
317 Dennis Wölfing and Rüdiger Sonderfeld.
319 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
320 These are extended versions of preadv and pwritev, respectively, taking an
321 additional flags argument. The set of supported flags depends on the
322 running kernel; full support currently requires kernel 4.7 or later.
324 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
325 create a new session ID for the spawned process. This feature is
326 scheduled to be added to the next major revision of POSIX; for the time
327 being, it is available under _GNU_SOURCE.
329 * errno.h is now safe to use from C-preprocessed assembly language on all
330 supported operating systems. In this context, it will only define the
331 Exxxx constants, as preprocessor macros expanding to integer literals.
333 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
334 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
335 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
336 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
338 To compile programs that use this feature, the compiler must support
339 128-bit floating point with the type name _Float128 (as defined by TS
340 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
341 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
342 must be defined to make the new interfaces visible.
344 The new functions and macros correspond to those present for other
345 floating-point types (except for a few obsolescent interfaces not
346 supported for the new type), with F128 or f128 suffixes; for example,
347 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
348 printf or scanf formats for the new type; the strfromf128 and strtof128
349 interfaces should be used instead.
351 Deprecated and removed features, and other changes affecting compatibility:
353 * The synchronization that pthread_spin_unlock performs has been changed to
354 now be equivalent to a C11 atomic store with release memory order to the
355 spin lock's memory location. Previously, several (but not all)
356 architectures used stronger synchronization (e.g., containing what is
357 often called a full barrier). This change can improve performance, but
358 may affect odd fringe uses of spin locks that depend on the previous
359 behavior (e.g., using spin locks as atomic variables to try to implement
360 Dekker's mutual exclusion algorithm).
362 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
365 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
366 will only be built and installed when the GNU C Library is configured with
367 --enable-obsolete-rpc. This allows alternative RPC implementations, such
368 as TIRPC or rpcsvc-proto, to be used.
370 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
371 libnss_compat, are deprecated, and will not be built or installed by
374 The NIS(+) support library, libnsl, is also deprecated. By default, a
375 compatibility shared library will be built and installed, but not headers
376 or development libraries. Only a few NIS-related programs require this
377 library. (In particular, the GNU C Library has never required programs
378 that use 'gethostbyname' to be linked with libnsl.)
380 Replacement implementations based on TIRPC, which additionally support
381 IPv6, are available from <https://github.com/thkukuk/>. The configure
382 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
383 name service modules, to be built and installed.
385 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
386 support is enabled, the configured recursive resolver must support EDNS.
387 (Responding to EDNS-enabled queries with responses which are not
388 EDNS-enabled is fine, but FORMERR responses are not.)
390 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
391 servers have not supported this opcode for a long time.
393 * The _res_opcodes variable has been removed from libresolv. It had been
394 exported by accident.
396 * <string.h> no longer includes inline versions of any string functions,
397 as this kind of optimization is better done by the compiler. The macros
398 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
400 * The nonstandard header <xlocale.h> has been removed. Most programs should
401 use <locale.h> instead. If you have a specific need for the definition of
402 locale_t with no other declarations, please contact
403 libc-alpha@sourceware.org and explain.
405 * The obsolete header <sys/ultrasound.h> has been removed.
407 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
409 * The obsolete function cfree has been removed. Applications should use
412 * The stack_t type no longer has the name struct sigaltstack. This changes
413 the C++ name mangling for interfaces involving this type.
415 * The ucontext_t type no longer has the name struct ucontext. This changes
416 the C++ name mangling for interfaces involving this type.
418 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
419 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
420 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
421 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
422 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
423 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
424 fpregset_t type no longer has the name struct fpu. This changes the C++
425 name mangling for interfaces involving those types.
427 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
428 synced with the kernel:
430 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
431 are not supported on this architecture and have been removed.
433 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
434 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
435 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
437 Programs that assume the GET/SETREGS ptrace requests are universally
438 available will now fail to build, instead of malfunctioning at runtime.
440 Changes to build and runtime requirements:
442 * Linux kernel 3.2 or later is required at runtime, on all architectures
443 supported by that kernel. (This is a change from version 2.25 only for
446 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
448 * On most architectures, GCC 4.9 or later is required to build the GNU C
449 Library. On powerpc64le, GCC 6.2 or later is required.
451 Older GCC versions and non-GNU compilers are still supported when
452 compiling programs that use the GNU C Library. (We do not know exactly
453 how old, and some GNU extensions to C may be _de facto_ required. If you
454 are interested in helping us make this statement less vague, please
455 contact libc-alpha@sourceware.org.)
457 Security related changes:
459 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
460 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
462 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
463 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
465 * Avoid printing a backtrace from the __stack_chk_fail function since it is
466 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
469 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
470 fixed (CVE-2017-12133).
472 The following bugs are resolved with this release:
474 [984] network: Respond to changed resolv.conf in gethostbyname
475 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
476 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
478 [12189] libc: __stack_chk_fail should not attempt a backtrace
480 [14096] time: Race condition on timezone/tst-timezone.out
481 [14172] localedata: az_IR: new locale
482 [14995] build: glibc fails to build if gold is the default linker, even if
484 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
485 [16637] network: inet_pton function is accepting IPv6 with bad format
486 [16640] string: string/strtok.c: undefined behaviour inconsistent between
487 x86 and other generic code
488 [16875] localedata: ko_KR: fix lang_name
489 [17225] localedata: ar_SY: localized month names for May and June are
491 [17297] localedata: da_DK: wrong date_fmt string
492 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
493 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
494 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
495 [19066] localedata: ar_SA abbreviated day and month names are in English
496 [19569] network: resolv: Support an arbitrary number of search domains
497 [19570] network: Implement random DNS server selection in the stub
499 [19838] locale: localedef fails on PA-RISC
500 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
501 order of 0D36 and 0D37
502 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
504 [20098] libc: FAIL: debug/backtrace-tst on hppa
505 [20257] network: sunrpc: clntudp_call does not enforce timeout when
507 [20275] localedata: locale day/abday/mon/abmon should not have trailing
509 [20313] localedata: Update locale data to Unicode 9.0
510 [20424] manual: Document how to provide a malloc replacement
511 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
513 [20686] locale: Add el_GR@euro to SUPPORTED.
514 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
515 failures consistently
516 [21015] dynamic-link: Document and fix --enable-bind-now
517 [21016] nptl: pthread_cond support is broken on hppa
518 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
519 frame-pointer on i386
520 [21049] libc: segfault in longjmp_chk() due to clobbered processor
522 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
523 [21088] libc: Build fails with --enable-static-nss
524 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
525 generic c code is used
526 [21109] libc: Tunables broken on big-endian
527 [21112] math: powf has large ulp errors with base close to 1 and exponent
529 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
531 [21120] malloc: glibc malloc is incompatible with GCC 7
532 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
534 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
535 (-0.0) when linking with -lieee
536 [21171] math: log10, log2 and lgamma return incorrect results
537 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
538 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
539 [21207] localedata: ce_RU: update weekdays from CLDR
540 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
541 [21217] localedata: Update months from CLDR-31
542 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
543 [21243] libc: support_delete_temp_file should issue warning for failed
545 [21244] libc: support resolv_test_start() socket fd close should be
547 [21253] libc: localedef randomly segfaults when using -fstack-check due to
548 new posix_spawn implementation
549 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
550 leads to lower CPU frequency
551 [21259] libc: [alpha] termios.h missing IXANY for POSIX
552 [21261] libc: [sparc64] bits/setjmp.h namespace
553 [21267] network: [mips] bits/socket.h IOC* namespace
554 [21268] libc: [alpha] termios.h NL2, NL3 namespace
555 [21270] libc: mmap64 silently truncates large offset values
556 [21275] libc: posix_spawn always crashes on ia64 now
557 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
558 [21280] math: [powerpc] logbl for POWER7 return incorrect results
559 [21289] libc: Incorrect declaration for 32-bit platforms with
560 _FILE_OFFSET_BITS=64 causes build error
561 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
562 not support gethostbyname4_r
563 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
565 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
567 [21340] libc: Support POSIX_SPAWN_SETSID
568 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
569 [21359] network: ns_name_pack needs additional byte in destination buffer
570 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
571 against fragmentation attacks (CVE-2017-12132)
572 [21369] network: resolv: Remove EDNS fallback
573 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
575 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
576 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
577 [21393] stdio: Missing dup3 error check in freopen, freopen64
578 [21396] libc: Use AVX2 memcpy/memset on Skylake server
579 [21399] localedata: Bad description for U00EC in
580 localedata/charmaps/CP1254
581 [21411] malloc: realloc documentation error
582 [21426] network: sys/socket.h uio.h namespace
583 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
584 [21445] libc: signal.h bsd_signal namespace
585 [21455] network: Network headers stdint.h namespace
586 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
588 [21475] network: resolv: Overlong search path is truncated mid-label
589 [21511] libc: sigstack namespace
590 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
591 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
592 bits/syscall.h: No such file or directory
593 [21517] libc: struct sigaltstack namespace
594 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
595 [21533] localedata: Update locale data to Unicode 10.0
597 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
598 junk at end of line, first unrecognized character is `@'
599 [21538] libc: SIG_HOLD missing for XPG4
600 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
601 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
602 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
603 [21543] libc: sigevent namespace
604 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
605 size for general purpose registers in mcontext_t structure
606 [21550] libc: sigwait namespace
607 [21552] libc: XPG4 bsd_signal namespace
608 [21554] libc: sigpause namespace
609 [21560] libc: sys/wait.h signal.h namespace
610 [21561] libc: waitid namespace
611 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
612 '/usr/include/stdlib.h': Permission denied
613 [21575] libc: sys/wait.h missing struct rusage definition
614 [21584] libc: sigaltstack etc namespace
615 [21597] libc: siginterrupt namespace
616 [21607] math: hppa: FAIL: math/test-tgmath
617 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
619 [21622] libc: [tile] missing SA_* for POSIX.1:2008
620 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
621 stack and heap (CVE-2017-1000366)
622 [21625] libc: wait3 namespace
623 [21654] nss: Incorrect pointer alignment in NSS group merge result
625 [21657] network: Parse interface zone id for node-local multicast
626 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
628 [21666] libc: .symver is used on common symbol
629 [21668] network: resolv: res_init cross-thread broadcast introduces race
631 [21687] math: tgmath.h totalorder, totalordermag return type
632 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
634 [21696] libc: Incorrect assumption of of __cpu_mask in
635 posix/sched_cpucount.c
636 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
637 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
639 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
640 leading to relocation crash
641 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
642 `resolv_conf_matches (resp, conf)' failed.
643 [21710] localedata: Added Samoan language locale for Samoa
644 [21711] localedata: Pashto yesstr/nostr locale are missing
645 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
646 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
647 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
648 [21723] localedata: yesstr/nostr missing for Chinese language locale
649 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
651 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
653 [21728] localedata: New Locale for Tongan language
654 [21729] localedata: incorrect LC_NAME fields for hi_IN
655 [21733] localedata: yesstr and nostr are missing for zh_HK
656 [21734] localedata: Missing yesstr and nostr are for kw_GB
657 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
658 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
659 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
660 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
662 [21744] libc: Tests failing on --enable-tunables --enable-stack-
664 [21749] localedata: Wrong abbreviated day name (“abday”) for
666 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
667 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
668 [21759] localedata: missing yesstr and nostr for Tigrinya
669 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
670 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
671 [21767] localedata: Missing Bislama locales
672 [21768] localedata: Missing yesstr and nostr for aa_ET
673 [21770] localedata: Missing Field in li_NL
674 [21778] nptl: Robust mutex may deadlock
675 [21779] libc: MicroBlaze segfaults when loading libpthread
676 [21783] localedata: Fix int_select international_call_prefixes
677 [21784] localedata: Inconsistency in country_isbn
678 [21788] localedata: Missing Country Postal Abbreviations
679 [21794] localedata: Added-country_isbn-for-Italy
680 [21795] localedata: Add/Fix country_isbn for France
681 [21796] localedata: Added country_isbn for Republic of Korea
682 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
683 [21799] localedata: Added int_select international_call_prefixes
684 [21801] localedata: Added int_select international_call_prefixes
685 [21804] nptl: Double semicolon in thread-shared-types.h
686 [21807] localedata: LC_ADDRESS fix for pap_CW
687 [21808] localedata: Fix LC_ADDRESS for pap_AW
688 [21821] localedata: Added country_name in mai_IN
689 [21822] localedata: Fix LC_TIME for mai_IN
690 [21823] localedata: missing yesstr, nostr for sa_IN
691 [21825] localedata: Fix name_mrs for mag_IN
692 [21828] localedata: 2.26 changelog should mention user visible changes
694 [21835] localedata: Added Maithili language locale for Nepal
695 [21838] localedata: Removed redundant data for the_NP
696 [21839] localedata: Fix LC_MONETARY for ta_LK
697 [21844] localedata: Fix Latin characters and Months Sequence.
698 [21848] localedata: Fix mai_NP Title Name
703 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
704 24731-2:2010, is supported to enable declarations of functions from that
705 TR. Note that not all functions from that TR are supported by the GNU C
708 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
709 18661-1:2014, is supported to enable declarations of functions and macros
710 from that TS. Note that not all features from that TS are supported by
713 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
714 18661-4:2015, is supported to enable declarations of functions and macros
715 from that TS. Note that most features from that TS are not supported by
718 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
719 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
720 Since the GNU C Library defaults to a much newer revision of POSIX, this
721 will only affect programs that specifically request an old conformance
722 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
723 see a change in the visible declarations, but a program compiled with
724 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
727 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
728 defined by all multithreaded code, but glibc has not required this for
731 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
732 means that in a future release, the macros “major”, “minor”, and “makedev”
733 will only be available from <sys/sysmacros.h>.
735 These macros are not part of POSIX nor XSI, and their names frequently
736 collide with user code; see for instance glibc bug 19239 and Red Hat bug
737 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
738 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
741 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
742 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
743 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
745 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
746 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
747 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
748 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
749 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
750 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
751 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
752 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
753 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
754 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
755 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
758 * New <math.h> features are added from TS 18661-1:2014:
760 - Signaling NaN macros: SNANF, SNAN, SNANL.
762 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
763 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
764 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
766 - llogb functions: the llogb, llogbf and llogbl functions, and the
767 FP_LLOGB0 and FP_LLOGBNAN macros.
769 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
772 - Comparison macros: iseqsig.
774 - Classification macros: iscanonical, issubnormal, iszero.
776 - Total order functions: totalorder, totalorderf, totalorderl,
777 totalordermag, totalordermagf, totalordermagl.
779 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
781 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
782 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
784 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
785 are added to libc. They convert a floating-point number into string.
787 * Most of glibc can now be built with the stack smashing protector enabled.
788 It is recommended to build glibc with --enable-stack-protector=strong.
789 Implemented by Nick Alcock (Oracle).
791 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
792 intended to be used instead of memset() to erase sensitive data after use;
793 the compiler will not optimize out calls to explicit_bzero even if they
794 are "unnecessary" (in the sense that no _correct_ program can observe the
795 effects of the memory clear).
797 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
798 to float instead of double. This does not affect the ABI of any libraries
799 that are part of the GNU C Library, but may affect the ABI of other
800 libraries that use this type in their interfaces.
802 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
803 float_t and double_t types are now defined to long double instead of float
804 and double. These options are not the default, and this does not affect
805 the ABI of any libraries that are part of the GNU C Library, but it may
806 affect the ABI of other libraries that use this type in their interfaces,
807 if they are compiled or used with those options.
809 * The getentropy and getrandom functions, and the <sys/random.h> header file
812 * The buffer size for byte-oriented stdio streams is now limited to 8192
813 bytes by default. Previously, on Linux, the default buffer size on most
814 file systems was 4096 bytes (and thus remains unchanged), except on
815 network file systems, where the buffer size was unpredictable and could be
816 as large as several megabytes.
818 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
819 for the Linux quota interface which predates kernel version 2.4.22 has
822 * The malloc_get_state and malloc_set_state functions have been removed.
823 Already-existing binaries that dynamically link to these functions will
824 get a hidden implementation in which malloc_get_state is a stub. As far
825 as we know, these functions are used only by GNU Emacs and this change
826 will not adversely affect already-built Emacs executables. Any undumped
827 Emacs executables, which normally exist only during an Emacs build, should
828 be rebuilt by re-running “./configure; make” in the Emacs build tree.
830 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
831 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
832 “no-ip6-dotint” had already been the default, and support for the
833 “ip6-dotint” option was removed from the Internet in 2006.
835 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
836 flag from <resolv.h> have been removed. The option relied on a
837 backwards-incompatible DNS extension which was never deployed on the
840 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
841 RES_BLAST defined in the <resolv.h> header file have been deprecated.
842 They were already unimplemented.
844 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
845 _res.flags are deprecated. The flag was standardized in RFC 2133, but
846 removed again from the IETF name lookup interface specification in RFC
847 2553. Applications should use getaddrinfo instead.
849 * DNSSEC-related declarations and definitions have been removed from the
850 <arpa/nameser.h> header file, and libresolv will no longer attempt to
851 decode the data part of DNSSEC record types. Previous versions of glibc
852 only implemented minimal support for the previous version of DNSSEC, which
853 is incompatible with the currently deployed version.
855 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
856 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
857 <arpa/nameser.h> header file because the distinction between RR types and
858 meta-RR types is not officially standardized, subject to revision, and
859 thus not suitable for encoding in a macro.
861 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
862 and rhook members of the res_state type in <resolv.h> have been removed.
863 The glibc stub resolver did not support these hooks, but the header file
864 did not reflect that.
866 * For multi-arch support it is recommended to use a GCC which has
867 been built with support for GNU indirect functions. This ensures
868 that correct debugging information is generated for functions
869 selected by IFUNC resolvers. This support can either be enabled by
870 configuring GCC with '--enable-gnu-indirect-function', or by
871 enabling it by default by setting 'default_gnu_indirect_function'
872 variable for a particular architecture in the GCC source file
875 * GDB pretty printers have been added for mutex and condition variable
876 structures in POSIX Threads. When installed and loaded in gdb these pretty
877 printers show various pthread variables in human-readable form when read
878 using the 'print' or 'display' commands in gdb.
880 * Tunables feature added to allow tweaking of the runtime for an application
881 program. This feature can be enabled with the '--enable-tunables' configure
882 flag. The GNU C Library manual has details on usage and README.tunables has
883 instructions on adding new tunables to the library.
885 * A new version of condition variables functions have been implemented in
886 the NPTL implementation of POSIX Threads to provide stronger ordering
889 * A new version of pthread_rwlock functions have been implemented to use a more
890 scalable algorithm primarily through not using a critical section anymore to
893 Security related changes:
895 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
896 have been created with makecontext could fail to terminate due to a
897 missing .cantunwind annotation. This has been observed to lead to a hang
898 (denial of service) in some Go applications compiled with gccgo. Reported
899 by Andreas Schwab. (CVE-2016-6323)
901 * The DNS stub resolver functions would crash due to a NULL pointer
902 dereference when processing a query with a valid DNS question type which
903 was used internally in the implementation. The stub resolver now uses a
904 question type which is outside the range of valid question type values.
907 The following bugs are resolved with this release:
909 [4099] stdio: Overly agressive caching by stream i/o functions.
910 [7065] build: Support building glibc with -fstack-protector or -fstack-
912 [9842] localedata: en_CA: incorrect date format
913 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
914 before it started waiting
915 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
916 [15765] nptl: sem_open is wrongly a cancellation point
917 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
918 [16458] libc: endian.h and netinet/in.h byte order macros return values of
920 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
921 library linked with pthread
922 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
924 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
925 [17252] libc: getrandom and getentropy syscall
926 [17730] malloc: thread-local storage is sometimes improperly free()'d
927 after being __libc_memalign()'d
928 [18241] stdio: failed fseek on memstream does not set errno and can fail
930 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
932 [18463] nptl: pthread_cond_broadcast issue when surrounded by
933 PTHREAD_PRIO_INHERIT mutex on ARM
934 [18784] network: res_query and related function crash for special record
935 type queries (CVE-2015-5180)
936 [19380] math: strtod does not raise "inexact"
937 [19387] string: Integer overflow in memchr
938 [19390] string: Integer overflow in strncat
939 [19398] build: linknamespace tests fail with massively parallel build
940 [19402] nptl: Deadlock with robust shared mutex and asynchronous
942 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
943 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
944 [19514] libc: [PATCH] Fix spelling errors in spelling
945 "implement"/"implementation" in several places
946 [19582] network: Deprecate RES_USE_INET6
947 [19673] manual: clog10 docs appear to be erroneous
948 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
949 causes a segmentation fault
950 [19826] libc: invalid pointer returned from __tls_get_addr with static
952 [20016] network: resolv: Remove hooks support from the API
953 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
955 [20033] math: [x86_64] vectorized math function don't call the __finite
957 [20116] nptl: use after free in pthread_create
958 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
959 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
961 [20311] nptl: please install proc_service.h
962 [20366] libc: Compilation errors in installed headers in strict-compliance
964 [20370] malloc: malloc: Arena free list management is still racy
965 (incorrect fix in bug 19243)
966 [20386] libc: assert (X = 0) does not result in GCC warning
967 [20432] malloc: malloc: Minimize interface required for interposition
968 [20435] libc: Missing unwind info in __startcontext causes infinite loop
969 in _Unwind_Backtrace (CVE-2016-6323)
970 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
971 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
973 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
974 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
975 [20477] network: resolv: incorrect double-checked locking related to
977 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
979 [20495] math: x86_64 performance degradation due to AVX/SSE transition
981 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
982 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
983 cause transition penalty
984 [20517] math: sparcv9 missing fdiml compat symbol
985 [20524] manual: strverscmp is inconsistent
986 [20525] libc: <sys/quota.h> should be based on kernel headers
987 [20539] math: GCC 7 -static -lm fails to link at -O3
988 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
990 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
992 [20591] network: Remove obsolete DNSSEC support
993 [20592] network: DNS resource record type classification macros in
994 <arpa/nameser.h> are incorrect
995 [20593] network: Update DNS RR type definitions
996 [20611] network: getaddrinfo accepts invalid numeric scope IDs
997 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
999 [20629] network: libresolv: Remove support for bitstring labels
1001 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
1002 assertion: "maxidx >= 2"
1003 [20660] math: [arm] Use VSQRT
1004 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
1005 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
1006 [20689] libc: Test for FMA should also check for AVX.
1007 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
1008 [20715] math: iszero macro breaks existing code
1009 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
1010 [20728] libc: powerpc: Missing TOC stub in clone
1011 [20729] build: glibc-2.24 fails to build for i486 with -Os
1012 [20750] build: Build fails with default PIE enabled gcc-6.x
1013 [20768] math: [alpha] sqrt fegetenv namespace
1014 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
1016 [20787] math: float_t is defined as float incorrectly on x86_64 even if
1017 __FLT_EVAL_METHOD__ is 2
1018 [20790] network: rpcgen buffer overrun in get_prog_declaration
1019 [20822] nptl: race condition in __lll_unlock_elision on powerpc
1020 [20829] libc: crypt snprintf namespace
1021 [20847] libc: tst-vfork3 failure
1022 [20855] math: Default bits/mathdef.h has inappropriate float_t
1023 [20859] math: [sh4] FP_ILOGB0 invalid
1024 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
1025 U+20AC), not same as GBK
1026 [20915] dynamic-link: global-dynamic TLS broken on aarch64
1027 [20916] math: pow handling of sNaN arguments
1028 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
1029 [20919] math: Bad pow (qNaN, 0) result with -lieee
1030 [20940] math: hypot sNaN handling
1031 [20947] math: fmax, fmin sNaN handling
1032 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
1033 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
1035 [20971] string: powerpc64/power7 memchr overflows internal pointer check
1036 [20973] nptl: robust mutexes: Lost wake-ups
1037 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
1038 [20978] nis: strlen on null pointer in nss_nisplus
1039 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
1041 [21014] string: i686 memchr overflows internal pointer check
1042 [21019] libc: [mips] n32 lseek incorrect on overflow
1043 [21022] libc: [microblaze] __backtrace get_frame_size namespace
1044 [21026] libc: [MIPS] readahead syscall is broken on n64
1045 [21028] math: Fallback fesetexceptflag should always succeed
1046 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
1047 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
1049 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
1050 [21061] librt: [microblaze] librt lost clock_* exports
1051 [21073] libc: tunables: insecure environment variables passed to
1052 subprocesses with AT_SECURE
1053 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
1057 * The minimum Linux kernel version that this version of the GNU C Library
1058 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
1059 kernel version 2.6.32 or later suffices (on architectures that already
1060 required kernel versions more recent than 3.2, those requirements remain
1061 unchanged). Linux 3.2 or later kernel headers are required on all
1064 * The pap_AN locale has been deleted. This has been deprecated for a long
1065 time. It has been replaced by pap_AW & pap_CW, both of which have long
1066 been included in previous releases.
1068 * The readdir_r and readdir64_r functions have been deprecated. It is
1069 recommended to use readdir and readdir64 instead.
1071 * The type “union wait” has been removed. It was deprecated in the early
1072 1990s and never part of POSIX. Application code should use the int type
1073 instead of “union wait”.
1075 * A new NSS action is added to facilitate large distributed system
1076 administration. The action, MERGE, allows remote user stores like LDAP
1077 to be merged into local user stores like /etc/groups in order to provide
1078 easy to use, updated, and managed sets of merged credentials. The new
1079 action can be used by configuring it in /etc/nsswitch.conf:
1080 group: files [SUCCESS=merge] nis
1081 Implemented by Stephen Gallagher (Red Hat).
1083 * The deprecated __malloc_initialize_hook variable has been removed from the
1086 * The long unused localedef --old-style option has been removed. It hasn't
1087 done anything in over 16 years. Scripts using this option can safely
1090 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
1091 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
1092 return the next representable value in the direction of positive infinity
1093 and the nextdown functions return the next representable value in the
1094 direction of negative infinity. These are currently enabled as GNU
1097 Security related changes:
1099 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
1100 could result in a stack overflow when getnetbyname was called with an
1101 overly long name. (CVE-2016-3075)
1103 * Previously, getaddrinfo copied large amounts of address data to the stack,
1104 even after the fix for CVE-2013-4458 has been applied, potentially
1105 resulting in a stack overflow. getaddrinfo now uses a heap allocation
1106 instead. Reported by Michael Petlan. (CVE-2016-3706)
1108 * The glob function suffered from a stack-based buffer overflow when it was
1109 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
1110 Reported by Alexander Cherepanov. (CVE-2016-1234)
1112 * The Sun RPC UDP client could exhaust all available stack space when
1113 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
1114 alloca plugin for GCC. (CVE-2016-4429)
1116 * The IPv6 name server management code in libresolv could result in a memory
1117 leak for each thread which is created, performs a failing naming lookup,
1118 and exits. Over time, this could result in a denial of service due to
1119 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
1121 The following bugs are resolved with this release:
1123 [1170] localedata: ne_NP: update Nepali locale definition file
1124 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
1126 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
1127 [6796] math: fdim() does not set errno on overflow
1128 [10354] libc: posix_spawn should use vfork() in more cases than presently
1129 [11213] localedata: localedata: add copyright disclaimer to locale files
1130 [12143] localedata: chr_US: new Cherokee locale
1131 [12450] localedata: sgs_LT: new locale
1132 [12676] localedata: ln_CD: new locale
1133 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
1135 [13304] math: fma, fmaf, fmal produce wrong results
1136 [14259] build: --localedir arg to configure is ignored
1137 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
1138 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
1139 [14934] localedata: es_CL: wrong first weekday chilean locale
1140 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
1142 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
1144 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
1145 [15368] nptl: raise() is not async-signal-safe
1146 [15479] math: ceil, floor, round and trunc raise inexact exception
1147 [15578] localedata: kk_KZ: various updates
1148 [16003] localedata: pap_AN: punt old locale
1149 [16137] localedata: iw_IL: punt old locale
1150 [16190] localedata: eo: new esperanto locale
1151 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
1152 [16742] malloc: race condition: pthread_atfork() called before first
1153 malloc() results in unexpected locking behaviour/deadlocks
1154 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
1156 [16983] localedata: postal_fmt does not allow %l and %n modifiers
1157 [17565] localedata: pt_PT: wrong (work-)week start
1158 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
1159 [17950] build: Build fails with -msse
1160 [18205] localedata: be_BY*: wrong first_weekday and first_workday
1161 [18433] libc: posix_spawn does not return correctly upon failure to
1163 [18453] localedata: charmaps/IBM875: incorrect codes
1164 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
1166 [18896] localedata: he_IL: improvements for currency
1167 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
1168 Romanian locale data
1169 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
1171 [19056] libc: Deprecate readdir_r
1172 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
1174 [19198] localedata: nl_NL: small improvements for Dutch locales
1175 [19257] network: Per-thread memory leak in __res_vinit with IPv6
1176 nameservers (CVE-2016-5417)
1177 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
1179 [19400] locale: Language missing in "iso-639.def", trivial fix in
1181 [19431] malloc: Deadlock between fflush, getdelim, and fork
1182 [19505] libc: Incorrect file descriptor validity checks in
1183 posix_spawn_file_actions_add{open,close,dup2}
1184 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
1185 when using RTLD_NEXT
1186 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
1187 `intl/{gettextP,loadinfo}.h'
1188 [19534] libc: execle, execlp may use malloc
1189 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
1190 [19573] network: res_nclose and __res_maybe_init disagree about name
1191 server initialization, breaking Hesiod
1192 [19575] localedata: Status of GB18030 tables
1193 [19581] localedata: sr_* date_fmt string contains additional newline
1194 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
1196 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
1197 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
1198 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
1199 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
1201 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
1203 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
1205 [19610] dynamic-link: ldconfig -X removes stale symbolic links
1206 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
1207 [19633] locale: strfmon_l applies global locale to number formatting
1208 [19642] network: Memory leak in getnameinfo
1209 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
1210 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
1212 [19654] math: [x86_64] Need testcase for BZ #19590 fix
1213 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
1215 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
1216 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
1218 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
1220 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
1222 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
1223 pointers and lengths in error-case.
1224 [19727] locale: Converting from/to UTF-xx with iconv() does not always
1225 report errors on UTF-16 surrogates values.
1226 [19755] nscd: nscd assertion failure in gc
1227 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
1228 [19759] libc: mempcpy shouldn't be inlined
1229 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
1230 [19765] libc: s390 needs an optimized mempcpy
1231 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1232 NAME_MAX limit assumption (CVE-2016-1234)
1233 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1234 [19787] network: Missing and incorrect truncation checks in getnameinfo
1235 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1237 [19791] network: Assertion failure in res_query.c with un-connectable name
1239 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1240 [19822] math: libm.so install clobbers old version
1241 [19825] network: resolv: send_vc can return uninitialized data in second
1242 response to getaddrinfo
1243 [19830] network: nss_dns: should check RDATA length against buffer length
1244 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1245 confronted with A/AAAA records of invalid size
1246 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1247 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1248 [19853] stdio: Printing IBM long double in decimal with high precision is
1250 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1251 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1252 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1254 [19865] network: Assertion failure or memory leak in
1255 _nss_dns_getcanonname_r
1256 [19868] network: nss_dns: netent code does not skip over non-PTR records
1257 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1259 [19881] string: Improve x86-64 memset
1260 [19907] string: Incorrect memcpy tests
1261 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1263 [19925] libc: termios.h XCASE namespace
1264 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1265 [19929] libc: limits.h NL_NMAX namespace
1266 [19931] stdio: Memory leak in vfprintf
1267 [19957] libc: clone(CLONE_VM) access invalid parent memory
1268 [19963] localedata: en_IL: New locale
1269 [19989] stdio: stdio.h cuserid namespace
1270 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1272 [19996] locale: langinfo.h nl_langinfo_l namespace
1273 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1274 [20010] network: getaddrinfo: Stack overflow in hostent translation
1276 [20012] stdio: libio: fmemopen append mode failure
1277 [20014] stdio: stdio.h namespace for pre-threads POSIX
1278 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1279 [20023] libc: fcntl.h timespec namespace
1280 [20024] math: [x86_64] vectorized sincos trashes the stack
1281 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1282 [20041] time: sys/time.h timespec namespace
1283 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1284 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1285 [20051] libc: ttyslot in wrong header under wrong conditions
1286 [20054] libc: gethostname not declared for XPG4
1287 [20055] libc: termios.h missing tcgetsid for XPG4
1288 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1290 [20073] libc: sys/stat.h fchmod namespace
1291 [20074] libc: stdlib.h rand_r namespace
1292 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1293 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1295 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1296 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1298 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1299 [20119] libc: Wrong mask for processors level type from CPUID
1300 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1301 AS not supporting AVX512
1302 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1304 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1305 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1307 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1308 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1309 [20178] libc: posix_spawn{p} should not call exit
1310 [20191] stdio: libio: vtables hardening
1311 [20195] string: FMA4 detection requires CPUID execution with register
1313 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1314 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1316 [20212] math: acos (sNaN) returns sNaN
1317 [20213] math: asin (sNaN) returns sNaN
1318 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1319 [20218] math: [i386] asinhl (sNaN) returns sNaN
1320 [20219] math: [i386] atanhl (sNaN) returns sNaN
1321 [20222] stdio: fopencookie: Mangle function pointers
1322 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1323 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1324 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1326 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1327 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1328 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1329 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1330 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1331 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1332 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1333 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1334 [20240] math: modf (sNaN) returns sNaN
1335 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1336 [20250] math: frexp (sNaN) returns sNaN
1337 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1338 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1340 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1341 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1342 subscript is below array bounds [-Werror=array-bounds]
1343 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1344 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1346 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1347 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1349 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1350 "invalid" exceptions
1351 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1352 [20316] localedata: id_ID: Februari instead of Pebruari
1353 [20327] string: POWER8 strcasecmp returns incorrect result
1354 [20347] math: Failure: Test: j0_downward (0xap+0)
1355 [20348] libc: FAIL: misc/tst-preadvwritev64
1356 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1357 [20350] libc: There is no test for p{read,write}64
1358 [20357] math: Incorrect cos result for 1.5174239687223976
1359 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1363 * Unicode 8.0.0 Support: Character encoding, character type info, and
1364 transliteration tables are all updated to Unicode 8.0.0, using new
1365 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1366 These updates cause user visible changes, such as the fixes for bugs
1367 89, 16061, and 18568.
1369 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1370 kernel-internal CPU set size. This means that requests that change the
1371 CPU affinity which failed before (for example, an all-ones CPU mask) will
1372 now succeed. Applications that need to determine the effective CPU
1373 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1374 setting it because the kernel can adjust it (and the previous size check
1375 would not detect this in the majority of cases).
1377 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1378 the following new symbols are used: fts64_children, fts64_close,
1379 fts64_open, fts64_read and fts64_set.
1381 * getaddrinfo now detects certain invalid responses on an internal netlink
1382 socket. If such responses are received, an affected process will
1383 terminate with an error message of "Unexpected error <number> on netlink
1384 descriptor <number>" or "Unexpected netlink response of size <number> on
1385 descriptor <number>". The most likely cause for these errors is a
1386 multi-threaded application which erroneously closes and reuses the netlink
1387 file descriptor while it is used by getaddrinfo.
1389 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1390 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1391 unnecessary serialization of memory allocation requests across threads.
1392 The defect is now corrected. Users should see a substantial increase in
1393 the concurent throughput of allocation requests for applications which
1394 trigger this bug. Affected applications typically create and
1395 destroy threads frequently. (Bug 19048 was reported and analyzed by
1398 * There is now a --disable-timezone-tools configure option for disabling the
1399 building and installing of the timezone related utilities (zic, zdump, and
1400 tzselect). This is useful for people who build the timezone data and code
1401 independent of the GNU C Library.
1403 * The obsolete header <regexp.h> has been removed. Programs that require
1404 this header must be updated to use <regex.h> instead.
1406 * The obsolete functions bdflush, create_module, get_kernel_syms,
1407 query_module and uselib are no longer available to newly linked binaries;
1408 the header <sys/kdaemon.h> has been removed. These functions and header
1409 were specific to systems using the Linux kernel and could not usefully be
1410 used with the GNU C Library on systems with version 2.6 or later of the
1413 * Optimized string, wcsmbs and memory functions for IBM z13.
1414 Implemented by Stefan Liebler.
1416 * Newly linked programs that define a variable called signgam will no longer
1417 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1418 require signgam to be set by those functions must ensure that they use the
1419 variable provided by the GNU C Library and declared in <math.h>, without
1420 defining their own copy.
1422 * The minimum GCC version that can be used to build this version of the GNU
1423 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1424 still be used to compile programs using the GNU C Library.
1426 Security related changes:
1428 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1429 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1431 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1432 the pointer guard feature. It is always enabled. Previously,
1433 LD_POINTER_GUARD could be used to disable security hardening in binaries
1434 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1437 * An integer overflow in hcreate and hcreate_r could lead to an
1438 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1440 * The catopen function no longer has unbounded stack usage. Reported by
1441 Max. (CVE-2015-8779)
1443 * The nan, nanf and nanl functions no longer have unbounded stack usage
1444 depending on the length of the string passed as an argument to the
1445 functions. Reported by Joseph Myers. (CVE-2014-9761)
1447 * A stack-based buffer overflow was found in libresolv when invoked from
1448 libnss_dns, allowing specially crafted DNS responses to seize control
1449 of execution flow in the DNS client. The buffer overflow occurs in
1450 the functions send_dg (send datagram) and send_vc (send TCP) for the
1451 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1452 family. The use of AF_UNSPEC triggers the low-level resolver code to
1453 send out two parallel queries for A and AAAA. A mismanagement of the
1454 buffers used for those queries could result in the response of a query
1455 writing beyond the alloca allocated buffer created by
1456 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
1457 the overflow. Thanks to the Google Security Team and Red Hat for
1458 reporting the security impact of this issue, and Robert Holiday of
1459 Ciena for reporting the related bug 18665. (CVE-2015-7547)
1461 The following bugs are resolved with this release:
1463 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
1464 [887] math: Math library function "logb" and "nextafter" inconsistent
1465 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
1466 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
1467 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
1468 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
1470 [4404] localedata: German translation of "Alarm clock" is misleading
1471 [6799] math: nextafter() and nexttoward() doen't set errno on
1472 overflow/underflow errors
1473 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
1475 [10432] nis: _nss_nis_setnetgrent assertion failure
1476 [11460] libc: fts has no LFS support
1477 [12926] network: getaddrinfo()/make_request() may spin forever
1478 [13065] nptl: Race condition in pthread barriers
1479 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
1480 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
1482 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
1483 [14912] libc: Rename non-installed bits/*.h headers
1484 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
1485 [15367] math: Let gcc use __builtin_isinf
1486 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
1487 [15421] math: lgamma wrongly sets signgam for ISO C
1488 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
1489 FE_INVALID with argument out of range
1490 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
1492 [15786] dynamic-link: ifunc resolver functions can smash function
1494 [15918] math: Unnecessary check for equality in hypotf()
1495 [16061] localedata: Review / update transliteration data
1496 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
1498 [16141] time: strptime %z offset restriction
1499 [16171] math: drem should be alias of remainder
1500 [16296] math: fegetround is pure?
1501 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
1502 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
1504 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
1505 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
1507 [16422] math: [powerpc] math-float, math-double failing llrint tests with
1508 "Exception "Inexact" set" on ppc32
1509 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
1510 [16517] math: Missing underflow exception from tanf/tan/tanl
1511 [16519] math: Missing underflow exception from sinhf
1512 [16520] math: Missing underflow exception from tanhf
1513 [16521] math: Missing underflow exception from exp2
1514 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
1516 [16734] stdio: fopen calls mmap to allocate its buffer
1517 [16961] math: nan function incorrect handling of bad sequences
1518 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
1519 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
1520 [16985] locale: localedef: confusing error message when opening output
1522 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
1523 [17197] locale: Redundant shift character in iconv conversion output at
1525 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
1526 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
1527 [17250] dynamic-link: static linking breaks nss loading
1528 (getaddrinfo/getpwnam/etc...)
1529 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
1531 [17441] math: isnan() should use __builtin_isnan() in GCC
1532 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
1533 (related to lock elision)
1534 [17787] manual: Exponent on page 324 of the PDF ends prematurely
1535 [17886] time: strptime should be able to parse "Z" as a timezone with %z
1536 [17887] time: strptime should be able to parse "+01:00" style timezones
1537 [17905] libc: catopen() Multiple unbounded stack allocations
1539 [18084] libc: backtrace (..., 0) dumps core on x86
1540 [18086] libc: nice() sets errno to 0 on success
1541 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
1542 is too large (CVE-2015-8778)
1543 [18251] dynamic-link: SONAME missing when audit modules provides path
1544 [18265] libc: add attributes for wchar string and memory functions
1545 [18370] math: csqrt missing underflows
1546 [18421] libc: [hppa] read-only segment has dynamic relocations
1547 [18472] libc: Obsolete syscall wrappers should be compat symbols
1548 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
1549 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
1550 [18525] localedata: Remove locale timezone information
1551 [18560] libc: [powerpc] spurious bits/ipc.h definitions
1552 [18568] localedata: Update locale data to Unicode 8.0
1553 [18589] locale: sort-test.sh fails at random
1554 [18595] math: ctan, ctanh missing underflows
1555 [18604] libc: assert macro-expands its argument
1556 [18610] math: S390: fetestexcept() reports any exception if DXC-code
1557 contains a vector instruction exception.
1558 [18611] math: j1, jn missing errno setting on underflow
1559 [18618] localedata: sync Chechen locale definitions with other *_RU
1561 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
1562 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
1563 [18665] network: In send_dg, the recvfrom function is NOT always using the
1564 buffer size of a newly created buffer (CVE-2015-7547)
1565 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
1567 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
1569 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
1570 [18699] math: tilegx cproj() for various complex infinities does not yield
1572 [18724] libc: Harden put*ent functions against data injection
1573 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
1574 [18755] build: build errors with -DNDEBUG
1575 [18757] stdio: fmemopen fails to set errno on failure
1576 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
1578 [18781] libc: openat64 lacks O_LARGEFILE
1579 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
1580 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
1581 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
1582 [18790] math: [ldbl-128ibm] tanhl inaccurate
1583 [18795] libc: stpncpy fortification misses buffer lengths that are
1584 statically too large
1585 [18796] build: build fails for --disable-mathvec
1586 [18803] math: hypot missing underflows
1587 [18820] stdio: fmemopen may leak memory on failure
1588 [18823] math: csqrt spurious underflows
1589 [18824] math: fma spurious underflows
1590 [18825] math: pow missing underflows
1591 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
1592 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
1593 [18870] build: sem_open.c fails to compile with missing symbol
1595 [18872] stdio: Fix memory leak in printf_positional
1596 [18873] libc: posix_fallocate overflow check ineffective
1597 [18875] math: Excess precision leads incorrect libm
1598 [18877] libc: arm: mmap offset regression
1599 [18887] libc: memory corruption when using getmntent on blank lines
1600 [18918] localedata: hu_HU: change time to HH:MM:SS format
1601 [18921] libc: Regression: extraneous stat() and fstat() performed by
1603 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
1604 binaries (CVE-2015-8777)
1605 [18951] math: tgamma missing underflows
1606 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
1608 [18953] localedata: lt_LT: change currency symbol to the euro
1609 [18956] math: powf inaccuracy
1610 [18961] math: [i386] exp missing underflows
1611 [18966] math: [i386] exp10 missing underflows
1612 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
1613 [18969] build: multiple string test failures due to missing locale
1615 [18970] libc: Reference of pthread_setcancelstate in libc.a
1616 [18977] math: float / long double Bessel functions not in XSI POSIX
1617 [18980] math: i386 libm functions return with excess range and precision
1618 [18981] math: i386 scalb*, ldexp return with excess range and precision
1619 [18982] stdio: va_list and vprintf
1620 [18985] time: Passing out of range data to strftime() causes a segfault
1622 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
1623 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
1624 [19012] locale: iconv_open leaks memory on error path
1625 [19016] math: clog, clog10 inaccuracy
1626 [19018] nptl: Mangle function pointers in tls_dtor_list
1627 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
1628 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
1629 [19048] malloc: malloc: arena free list can become cyclic, increasing
1631 [19049] math: [powerpc] erfc incorrect zero sign
1632 [19050] math: [powerpc] log* incorrect zero sign
1633 [19058] math: [x86_64] Link fail with -fopenmp and -flto
1634 [19059] math: nexttoward overflow incorrect in non-default rounding modes
1635 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
1636 [19074] network: Data race in _res_hconf_reorder_addrs
1637 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
1638 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
1639 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
1641 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
1643 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
1644 [19086] manual: posix_fallocate64 documented argument order is wrong.
1645 [19088] math: lround, llround missing exceptions close to overflow
1647 [19094] math: lrint, llrint missing exceptions close to overflow threshold
1648 [19095] math: dbl-64 lrint incorrect for 64-bit long
1649 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
1650 [19124] dynamic-link: ld.so failed to build with older assmebler
1651 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
1652 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
1653 [19134] math: [powerpc32] lround, lroundf spurious exceptions
1654 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
1655 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
1656 pthread_setaffinity_np
1657 [19156] math: [ldbl-128] j0l spurious underflows
1658 [19164] nptl: tst-getcpu fails with many possible CPUs
1659 [19168] math: math/test-ildoubl and math/test-ldouble failure
1660 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
1661 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
1663 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
1664 (FE_NOMASK_ENV) do not clear SSE exceptions
1665 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
1666 _int_new_arena/reused_arena
1667 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
1668 [19201] math: dbl-64 remainder incorrect sign of zero result
1669 [19205] math: bits/math-finite.h conditions do not match math.h and
1671 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
1672 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
1673 for C99-based standards
1674 [19212] libc: features.h not -Wundef clean
1675 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
1677 [19214] libc: Family and model identification for AMD CPU's are incorrect.
1678 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
1679 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
1681 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
1682 "inexact" exceptions
1683 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
1685 [19242] libc: strtol incorrect in Turkish locales
1686 [19243] malloc: reused_arena can pick an arena on the free list, leading
1687 to an assertion failure and reference count corruption
1688 [19253] time: tzset() ineffective when temporary TZ did not include DST
1690 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
1691 [19270] math: [hppa] Shared libm missing __isnanl
1692 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
1693 MAP_HUGETLB and MAP_STACK defines
1694 [19313] nptl: Wrong __cpu_mask for x32
1695 [19347] libc: grantpt: try to force a specific gid even without pt_chown
1696 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
1697 [19350] math: [ldbl-128ibm] sinhl spurious overflows
1698 [19351] math: [ldbl-128ibm] logl inaccurate near 1
1699 [19363] time: x32: times() return value wrongly truncates/sign extends
1701 [19367] dynamic-link: Improve branch prediction on Silvermont
1702 [19369] network: Default domain name not reset by res_ninit when "search"
1703 / "domain" entry is removed from resolv.conf
1704 [19375] math: powerpc: incorrect results for POWER7 logb with negative
1706 [19385] localedata: bg_BG: time separator should be colon, not comma
1707 [19408] libc: linux personality syscall wrapper may erroneously return an
1708 error on 32-bit architectures
1709 [19415] libc: dladdr returns wrong names on hppa
1710 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
1711 IBM905, IBM907, and IBM909
1712 [19439] math: Unix98 isinf and isnan functions conflict with C++11
1713 [19443] build: build failures with -DDEBUG
1714 [19451] build: Make check fails on test-double-vlen2
1715 [19462] libc: Glibc failed to build with -Os
1716 [19465] math: Wrong code with -Os
1717 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
1719 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
1721 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
1722 [19486] math: S390: Math tests fail with "Exception Inexact set".
1723 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
1724 [19550] libc: [mips] mmap negative offset handling inconsistent with other
1726 [19590] math: Fail to build shared objects that use libmvec.so functions.
1730 * The following bugs are resolved with this release:
1732 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
1733 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
1734 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
1735 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
1736 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
1737 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
1738 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
1739 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
1740 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
1741 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
1742 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
1743 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
1744 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
1745 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
1746 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
1747 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
1748 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
1749 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
1750 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
1751 18657, 18676, 18694, 18696, 18887.
1753 * Cache information can be queried via sysconf() function on s390 e.g. with
1754 _SC_LEVEL1_ICACHE_SIZE as argument.
1756 * A buffer overflow in gethostbyname_r and related functions performing DNS
1757 requests has been fixed. If the NSS functions were called with a
1758 misaligned buffer, the buffer length change due to pointer alignment was
1759 not taken into account. This could result in application crashes or,
1760 potentially arbitrary code execution, using crafted, but syntactically
1761 valid DNS responses. (CVE-2015-1781)
1763 * The time zone file parser has been made more robust against crafted time
1764 zone files, avoiding heap buffer overflows related to the processing of
1765 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
1766 large time zone data files. Overly long time zone specifiers in the TZ
1767 variable no longer result in stack overflows and crashes.
1769 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
1770 for LD and GD on x86 and x86-64, has been implemented. You will need
1771 binutils-2.24 or later to enable this optimization.
1773 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
1774 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
1775 Hat). These updates cause user visible changes, such as the fix for bug
1778 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
1779 and getXXbyYY NSS calls for the same database, causing a denial-of-service
1780 condition in some applications.
1782 * Added vector math library named libmvec with the following vectorized x86_64
1783 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
1785 The library can be disabled with --disable-mathvec. Use of the functions is
1786 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
1787 Shared library libmvec.so is linked in as needed when using -lm (no need to
1788 specify -lmvec explicitly for not static builds).
1789 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
1791 * A new fmemopen implementation has been added with the goal of POSIX
1792 compliance. The new implementation fixes the following long-standing
1793 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
1794 old implementation is still present for use be by existing binaries.
1796 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
1797 releases. It has been fixed to match 2.19 and older, but binaries built
1798 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
1800 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
1801 Contributed by Roland McGrath (Google).
1803 * The header <regexp.h> is deprecated, and will be removed in a future
1804 release. Use of this header will trigger a deprecation warning.
1805 Application developers should update their code to use <regex.h> instead.
1807 This header was formerly part of SUS, but was deprecated in 1994 and
1808 removed from the standard in 2001. Also, the glibc implementation
1809 leaks memory. See BZ#18681 for more details.
1813 * The following bugs are resolved with this release:
1815 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
1816 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
1817 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
1818 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
1819 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
1820 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
1821 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
1822 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
1823 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
1824 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
1827 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
1828 too little memory for the to-be-scanned arguments and overflow the
1829 allocated buffer. The implementation now correctly computes the required
1830 buffer size when using malloc, and switches to malloc from alloca as
1833 * A new semaphore algorithm has been implemented in generic C code for all
1834 machines. Previous custom assembly implementations of semaphore were
1835 difficult to reason about or ensure that they were safe. The new version
1836 of semaphore supports machines with 64-bit or 32-bit atomic operations.
1837 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
1838 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
1840 * Port to Altera Nios II has been contributed by Mentor Graphics.
1842 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
1843 implementations for powerpc64/powerpc64le.
1844 Implemented by Adhemerval Zanella (IBM).
1846 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
1847 and powerpc64le. This may improve lock scaling of existing programs on
1848 HTM capable systems. The lock elision code is only enabled with
1849 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1850 powerpc will issue a transaction abort on every syscall to avoid side
1851 effects being visible outside transactions.
1853 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1854 AArch64. Contributed by ARM Ltd.
1856 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1858 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1859 under certain input conditions resulting in the execution of a shell for
1860 command substitution when the application did not request it. The
1861 implementation now checks WRDE_NOCMD immediately before executing the
1862 shell and returns the error WRDE_CMDSUB as expected.
1864 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1865 processing format strings with a large number of format specifiers.
1867 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1868 infinite loop if the DNS response contained a PTR record of an unexpected
1871 * The minimum GCC version that can be used to build this version of the GNU
1872 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1873 still be used to compile programs using the GNU C Library.
1875 * The GNU C Library is now built with -Werror by default. This can be
1876 disabled by configuring with --disable-werror.
1878 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1880 * The obsolete sigvec function has been removed. This was the original
1881 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1882 programs have been using instead for about 25 years. Of course, ABI
1883 compatibility for old binaries using sigvec remains intact.
1885 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1886 with newer versions of bison.
1888 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1889 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1890 registers overlay two consecutive single-precision registers. MIPS32R2
1891 introduced a new FPU mode (FR=1) where double-precision registers extend the
1892 corresponding single-precision registers which is incompatible with the
1893 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1894 require the use of FR=1 making a transition necessary. New o32 ABI
1895 extensions enable users to migrate over time from the original o32 ABI
1896 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1897 tracks the ABI of any loaded object and verifies that new objects are
1898 compatible. Mode transitions will also be requested as required and
1899 unsupportable objects will be rejected. The ABI checks include both soft and
1900 hard float ABIs for o32, n32 and n64.
1902 GCC 5 with GNU binutils 2.25 onwards:
1903 It is strongly recommended that all o32 system libraries are built using the
1904 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1905 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1906 compiler using --with-fp-32=xx to set this by default.
1910 * The following bugs are resolved with this release:
1912 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1913 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1914 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1915 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1916 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1917 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1918 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1919 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1920 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1921 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1922 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1923 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1924 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1925 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1926 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1928 * Reverted change of ABI data structures for s390 and s390x:
1929 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1930 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1931 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1932 are preserved pointing straight to the same implementation as the old ones.
1933 Given that, new callers will simply provide a too-big buffer to these
1934 functions. Any applications/libraries out there that embed jmp_buf or
1935 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1936 against 2.19 headers will have to rebuilt again. This is necessary in any
1937 case to revert the breakage in their ABI caused by the glibc change.
1939 * Support for file description locks is added to systems running the
1940 Linux kernel. The standard file locking interfaces are extended to
1941 operate on file descriptions, not file descriptors, via the use of
1942 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1943 are associated with an open file instead of a process.
1945 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1947 * The minimum Linux kernel version that this version of the GNU C Library
1948 can be used with is 2.6.32.
1950 * Running the testsuite no longer terminates as soon as a test fails.
1951 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1952 with PASS or FAIL lines for individual tests. A summary of the results is
1953 printed, including a list of failing lists, and "make check" exits with
1954 error status if there were any unexpected failures. "make check
1955 stop-on-test-failure=y" may be used to keep the old behavior.
1957 * The am33 port, which had not worked for several years, has been removed
1960 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1961 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1962 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1963 conflicted with POSIX (support for which was removed in 2.19), the
1964 interfaces those macros enabled remain available when compiling with
1965 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1966 test macros defined.
1968 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1970 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1971 This may improve lock scaling of existing programs on TX capable systems.
1972 The lock elision code is only built with --enable-lock-elision=yes and
1973 then requires a GCC version supporting the TX builtins. With lock elision
1974 default mutexes are elided via __builtin_tbegin, if the cpu supports
1975 transactions. By default lock elision is not enabled and the elision code
1978 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1979 copy the path argument. This allowed programs to cause posix_spawn to
1980 deference a dangling pointer, or use an unexpected pathname argument if
1981 the string was modified after the posix_spawn_file_actions_addopen
1984 * All supported architectures now use the main glibc sysdeps directory
1985 instead of some being in a separate "ports" directory (which was
1986 distributed separately before glibc 2.17).
1988 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1989 On configurations that support it (all Linux configurations), it's now
1990 used regardless of the --enable-add-ons switch to configure. It is no
1991 longer possible to build such configurations without pthreads support.
1993 * Locale names, including those obtained from environment variables (LANG
1994 and the LC_* variables), are more tightly checked for proper syntax.
1995 setlocale will now fail (with EINVAL) for locale names that are overly
1996 long, contain slashes without starting with a slash, or contain ".." path
1997 components. (CVE-2014-0475) Previously, some valid locale names were
1998 silently replaced with the "C" locale when running in AT_SECURE mode
1999 (e.g., in a SUID program). This is no longer necessary because of the
2002 * On x86-64, the dynamic linker's lazy-binding support is now compatible
2003 with application code using Intel MPX instructions. (With all previous
2004 versions, the MPX register state could be clobbered when making calls
2005 into or out of a shared library.) Note that while the new dynamic
2006 linker is compatible with all known x86 hardware whether or not it
2007 supports Intel MPX, some x86 instruction-set emulators might fail to
2008 handle the new instruction encodings. This is known to affect Valgrind
2009 versions up through 3.9 (but will be fixed in the forthcoming 3.10
2010 release), and might affect other tools that do instruction emulation.
2012 * Support for loadable gconv transliteration modules has been removed.
2013 The support for transliteration modules has been non-functional for
2014 over a decade, and the removal is prompted by security defects. The
2015 normal gconv conversion modules are still supported. Transliteration
2016 with //TRANSLIT is still possible, and the //IGNORE specifier
2017 continues to be supported. (CVE-2014-5119)
2019 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
2020 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
2021 resulting a denial-of-service security vulnerability in applications which
2022 use functions related to iconv. (CVE-2014-6040)
2026 * The following bugs are resolved with this release:
2028 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
2029 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
2030 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
2031 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
2032 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
2033 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
2034 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
2035 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
2036 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
2037 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
2038 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
2039 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
2040 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
2041 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
2042 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
2043 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
2044 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
2045 16431, 16453, 16474, 16506, 16510, 16529
2047 * Slovenian translations for glibc messages have been contributed by the
2048 Translation Project's Slovenian team of translators.
2050 * The public headers no longer use __unused nor __block. This change is to
2051 support compiling programs that are derived from BSD sources and use
2052 __unused internally, and to support compiling with Clang's -fblock
2053 extension which uses __block.
2055 * CVE-2012-4412 The strcoll implementation caches indices and rules for
2056 large collation sequences to optimize multiple passes. This cache
2057 computation may overflow for large collation sequences and may cause a
2058 stack or buffer overflow. This is now fixed to use a slower algorithm
2059 which does not use a cache if there is an integer overflow.
2061 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
2062 rules for large collation sequences to optimize multiple passes and falls
2063 back to alloca if malloc fails, resulting in a possible stack overflow.
2064 The implementation now falls back to an uncached collation sequence lookup
2067 * CVE-2013-4788 The pointer guard used for pointer mangling was not
2068 initialized for static applications resulting in the security feature
2069 being disabled. The pointer guard is now correctly initialized to a
2070 random value for static applications. Existing static applications need
2071 to be recompiled to take advantage of the fix (bug 15754).
2073 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
2074 to the d_name member of struct dirent, or omit the terminating NUL
2075 character. (Bugzilla #14699).
2077 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
2078 aligned_alloc functions could allocate too few bytes or corrupt the
2079 heap when passed very large allocation size values (Bugzilla #15855,
2082 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
2083 for AF_INET6 has been fixed (Bugzilla #16072).
2085 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
2086 pap_CW, quz_PE, the_NP.
2088 * Substantially revised locales: gd_GB, ht_HT
2090 * The LC_ADDRESS field was updated to support country_car for almost all
2093 * ISO 1427 definitions were updated.
2095 * ISO 3166 definitions were updated.
2097 * The localedef utility now supports --big-endian and --little-endian
2098 command-line options to generate locales for a different system from that
2099 for which the C library was built.
2101 * Binary locale files now only depend on the endianness of the system for
2102 which they are generated and not on other properties of that system. As a
2103 consequence, binary files generated with new localedef may be incompatible
2104 with old versions of the GNU C Library, and binary files generated with
2105 old localedef may be incompatible with this version of the GNU C Library,
2106 in the following circumstances:
2108 + Locale files may be incompatible on m68k systems.
2110 + Locale archive files (but not separate files for individual locales) may
2111 be incompatible on systems where plain "char" is signed.
2113 * The configure option --disable-versioning has been removed. Builds with
2114 --disable-versioning had not worked for several years.
2116 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
2117 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
2119 * SystemTap probes for malloc have been introduced.
2121 * SystemTap probes for slow multiple precision fallback paths of
2122 transcendental functions have been introduced.
2124 * Support for powerpc64le has been added.
2126 * The soft-float powerpc port now supports e500 processors.
2128 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
2130 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
2131 set of header declarations that are enabled by default, even when other
2132 feature test macros or compiler options such as -std=c99 would otherwise
2133 disable some of those declarations.
2135 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
2136 conflict with POSIX. The libbsd-compat library (which was a dummy library
2137 that did nothing) has also been removed.
2139 * Preliminary documentation about Multi-Thread, Async-Signal and
2140 Async-Cancel Safety has been added.
2142 * Change of ABI data structures for s390 and s390x:
2143 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
2144 allow for future hardware extensions. All library functions that accept or
2145 return these structures were versioned in order to provide backwards
2146 compatibility with existing code. However, not all cases can be handled
2147 with interface versioning. If an application embeds either structure into
2148 another structure and that structure is passed to another compilation unit
2149 which expects the newer larger-sized object then any access to the new
2150 fields will result in undefined behaviour. Similarly any access to fields
2151 that were moved by the enlarging of the structures will cause undefined
2152 behaviour. To fix the undefined behaviour all objects that are part of the
2153 final in-memory image must agree on the size of structures, and this may
2154 require recompilation.
2158 * The following bugs are resolved with this release:
2160 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
2161 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
2162 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
2163 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
2164 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
2165 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
2166 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
2167 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
2168 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
2169 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
2170 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
2171 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
2172 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
2175 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
2176 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
2177 Distributions can re-enable building and using pt_chown via the new configure
2178 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
2179 considerable security risks and should only be used if the distribution
2180 understands and accepts the risks.
2182 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
2185 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
2186 fixed (Bugzilla #15330).
2188 * Add support for calling C++11 thread_local object destructors on thread
2189 and program exit. This needs compiler support for offloading C++11
2190 destructor calls to glibc.
2192 * Improved worst case performance of libm functions with double inputs and
2195 * Support for priority inherited mutexes in pthread condition variables on
2196 non-x86 architectures.
2198 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
2200 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
2202 * Optimized string functions for ARM. Implemented by Will Newton and
2205 * Optimized libm functions for SPARC. Implemented by David S. Miller.
2207 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
2210 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
2211 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
2213 * Added a benchmark framework to track performance of functions in glibc.
2215 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
2216 It is based on draft TS 18661 and currently enabled as a GNU extension.
2218 * On Linux, the clock function now uses the clock_gettime system call
2219 for improved precision, rather than old times system call.
2221 * Added support for version-3 tz format files. This is needed when using
2222 the tz database release 2013e or later, and affects a few unusual cases --
2223 currently only TZ='America/Godthab' for time stamps after 2037.
2225 * Added new API functions pthread_getattr_default_np and
2226 pthread_setattr_default_np to get and set the default pthread
2227 attributes of a process.
2229 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
2230 This may improve lock scaling of existing programs on TSX capable systems.
2231 When the --enable-lock-elision=yes parameter is specified at configure
2232 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2235 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2236 availability). Implemented by Ryan S. Arnold.
2238 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2242 * The following bugs are resolved with this release:
2244 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2245 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2246 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2247 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2248 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2249 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2250 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2251 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2252 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2253 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2254 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2255 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2256 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2257 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2258 14879, 14889, 14893, 14898, 14914.
2260 * Optimization of memcpy for MIPS.
2262 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2263 EMFILE has been fixed (Bugzilla #14889).
2265 * The add-on ports collection is now distributed in the "ports" subdirectory
2266 of the main GNU C Library distribution, rather than separately.
2268 * Port to ARM AArch64 contributed by Linaro.
2270 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2271 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2273 Implemented by Andreas Krebbel.
2275 * The new function secure_getenv allows secure access to the environment,
2276 returning NULL if running in a SUID/SGID process. This function replaces
2277 the internal function __secure_getenv.
2279 * SystemTap static probes have been added into the dynamic linker.
2280 Implemented by Gary Benson.
2282 * Optimizations of string functions strstr, strcasestr and memmem.
2283 Implemented by Maxim Kuvyrkov.
2285 * The minimum Linux kernel version that this version of the GNU C Library
2286 can be used with is 2.6.16.
2288 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2289 powerpc POWER7. Implemented by Will Schmidt.
2291 * New configure option --disable-nscd builds the C library such that it
2292 never attempts to contact the Name Service Caching Daemon (nscd).
2293 New configure option --disable-build-nscd avoids building nscd itself;
2294 this is the default if --disable-nscd is used.
2296 * Improved support for cross-compilation, including cross-testing and
2297 bootstrap builds without a previously built glibc.
2299 * Several testsuite tests are now able to test multiple IFUNC variants of an
2300 interface, rather than just testing the one that would be chooen by
2303 * New configure options --with-bugurl and --with-pkgversion, for
2304 distributors to use to embed their bug-reporting and package version
2305 information in --help and --version output.
2307 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2308 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2309 allows creation of chroots without the procfs mounted on /proc.
2311 * The `crypt' function now fails if passed salt bytes that violate the
2312 specification for those values. On Linux, the `crypt' function will
2313 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2314 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2315 when the mode is enabled.
2317 * The `clock_*' suite of functions (declared in <time.h>) is now available
2318 directly in the main C library. Previously it was necessary to link with
2319 -lrt to use these functions. This change has the effect that a
2320 single-threaded program that uses a function such as `clock_gettime' (and
2321 is not linked with -lrt) will no longer implicitly load the pthreads
2322 library at runtime and so will not suffer the overheads associated with
2323 multi-thread support in other code such as the C++ runtime library.
2325 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2330 * The following bugs are resolved with this release:
2332 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2333 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2334 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2335 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2336 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2337 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2338 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2339 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2340 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2341 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2342 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2343 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2344 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2345 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2346 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2347 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2348 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2349 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2350 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2351 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2352 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2353 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2356 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2357 configuring glibc with:
2358 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2359 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2360 Implemented by H.J. Lu.
2364 + define static_assert
2366 + do not declare gets
2368 + declare at_quick_exit and quick_exit also for ISO C11
2370 + aligned_alloc. NB: The code is deliberately allows the size parameter
2371 to not be a multiple of the alignment. This is a moronic requirement
2372 in the standard but it is only a requirement on the caller, not the
2375 + timespec_get added
2377 + uchar.h support added
2379 + CMPLX, CMPLXF, CMPLXL added
2381 Implemented by Ulrich Drepper.
2383 * Support for the IA-64 has been moved to ports.
2385 * Remove support for anything but ELF binary format
2387 * Checking versions of poll, ppoll added.
2388 Implemented by Ulrich Drepper.
2390 * More generic and 64-bit performance optimizations to math functions.
2391 Implemented by Ulrich Drepper.
2393 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2394 headers and functions available at compile time as they were before
2395 version 2.14. This option will be removed at some time in the future
2396 after the TI-RPC library becomes fully sufficient for the needs of
2397 existing applications.
2399 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2400 Note that glibc is not expected to work with any Linux kernel version
2403 * New header <sys/auxv.h> and function getauxval allowing easy access to
2404 the AT_* key-value pairs passed from the Linux kernel. The header also
2405 defines the HWCAP_* bits associated with the AT_HWCAP key.
2407 * New locales: mag_IN
2409 * New configure option --enable-systemtap builds SystemTap static probes
2410 into libc for setjmp and longjmp and into libpthread for various operations.
2411 So far the setjmp/longjmp probes and some of the libpthread probes are
2412 provided only for i*86 and x86_64.
2413 Implemented by Roland McGrath and Rayson Ho.
2415 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2417 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2420 * More optimized functions for SPARC. Implemented by David S. Miller.
2422 * Improved support for cross-compilation, especially bootstrap builds
2423 without a previously built glibc.
2425 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2426 Chris Metcalf from Tilera.
2428 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2429 now supported for ARM processors.
2431 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2432 as the name of the dynamic linker, to distinguish it from the
2433 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2435 * Support for CRIS has been removed from ports.
2437 * A new class of installed header has been documented for low-level
2438 platform-specific functionality. PowerPC added the first instance with a
2439 function to provide time base register access. Contributed by Tulio
2440 Magno Quites Machado Filho.
2442 * ix86 configurations now install header files that are consistent with
2443 what x86-64 configurations install. These same header files can be used
2444 for -m32, -m64, or -mx32 builds.
2445 Contributed by H.J. Lu.
2447 * Math library bug fixes. A thorough audit of all open math library bugs was
2448 conducted by Joseph Myers. Significant progress was made on many math
2449 library bugs resulting in more accurate exceptions and function results.
2450 Many thanks to all those that contributed including Andreas Jaeger for his
2451 patch review and work on the x87 trigonometric instruction issues.
2453 * Timezone data is no longer installed. Timezone-related binaries and scripts
2454 will continue to be installed. Users should obtain their timezone data from
2455 their distribution provider or from the tzdata package at
2456 <ftp://munnari.oz.au/pub/>.
2460 * The following bugs are resolved with this release:
2462 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
2463 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
2464 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
2465 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
2466 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
2467 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
2468 13484, 13506, 13515, 13523, 13524, 13538, 13540
2470 * New program pldd to list loaded object of a process
2471 Implemented by Ulrich Drepper.
2473 * Add nss_db support back to glibc. No more dependency on Berkeley db
2474 and support for initgroups lookups.
2475 Implemented by Ulrich Drepper.
2477 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
2478 Contributed by HJ Lu.
2480 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
2481 Contributed by HJ Lu.
2483 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
2484 on x86-32 and x86-64.
2485 Contributed by Liubov Dmitrieva.
2487 * Optimized strchr and strrchr for SSE on x86-32.
2488 Contributed by Liubov Dmitrieva.
2490 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
2491 for x86-64 and x86-32.
2492 Contributed by Liubov Dmitrieva.
2494 * New interfaces: scandirat, scandirat64
2495 Implemented by Ulrich Drepper.
2497 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
2498 Implemented by Ulrich Drepper.
2500 * nscd now also caches the netgroup database.
2501 Implemented by Ulrich Drepper.
2503 * Integrate libm with gcc's -ffinite-math-only option.
2504 Implemented by Ulrich Drepper.
2506 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
2507 to math functions. Implemented by Ulrich Drepper.
2509 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
2510 Implemented by Ulrich Drepper.
2512 * New Linux interfaces: process_vm_readv, process_vm_writev
2514 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
2515 Implemented by Ulrich Drepper.
2517 * Optimized nearbyint and strcasecmp for PPC.
2518 Implemented by Adhemerval Zanella.
2520 * New locales: bho_IN, unm_US, es_CU, ta_LK
2524 * The following bugs are resolved with this release:
2526 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
2527 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
2528 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
2529 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
2530 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
2531 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
2532 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
2533 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
2534 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
2535 12795, 12811, 12813, 12814, 12841
2537 * The RPC implementation in libc is obsoleted. Old programs keep working
2538 but new programs cannot be linked with the routines in libc anymore.
2539 Programs in need of RPC functionality must be linked against TI-RPC.
2540 The TI-RPC implementation is IPv6 enabled and there are other benefits.
2542 Visible changes of this change include (obviously) the inability to link
2543 programs using RPC functions without referencing the TI-RPC library and the
2544 removal of the RPC headers from the glibc headers.
2545 Implemented by Ulrich Drepper.
2547 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
2548 syncfs, setns, sendmmsg
2550 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
2551 yue_HK, lij_IT, mhr_RU
2553 * New encodings: CP770, CP771, CP772, CP773, CP774
2555 * New program sotruss to trace calls through PLTs
2556 Implemented by Ulrich Drepper.
2558 * The malloc hook implementation is marked deprecated and will be removed
2559 from the default implementation in the next version. The design never
2560 worked ever since the introduction of threads. Even programs which do
2561 not create threads themselves can use multiple threads created internally.
2565 * The following bugs are resolved with this release:
2567 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
2568 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
2569 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
2570 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
2573 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
2575 * POWER7 optimizations: memset, memcmp, strncmp
2577 * New optimized string functions for x86-64: strnlen (SSE2),
2578 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
2579 Implemented by Ulrich Drepper.
2583 * The following bugs are resolved with this release:
2585 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
2586 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
2587 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
2588 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
2589 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
2590 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
2591 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
2592 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
2594 * New interfaces: pthread_getname_np, pthread_setname_np
2596 * New Linux interface: recvmmsg
2598 * STT_GNU_IFUNC implemented for Sparc by David Miller.
2600 * The dynamic linker now recognizes supported ABI versions from the
2601 EI_ABIVERSION field in the ELF header.
2602 Implemented by Ulrich Drepper.
2604 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
2605 will not be used to fill in password fields in the passwd.byname replies.
2606 Instead it is used to synthesize the shadow.byname table, should it be
2607 missing. This is a useful mode in some installations involving Solaris.
2608 Implemented by Ulrich Drepper.
2610 * New locales: kok_IN, sq_MK, cv_RU
2614 * The following bugs are resolved with this release:
2616 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
2617 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
2618 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
2619 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
2620 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
2621 10789, 10817, 10823, 10840, 10847
2623 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
2625 Implemented by Ulrich Drepper.
2627 * Checking version of longjmp added that fails if an uninitialized stack
2628 frame would be created. Implemented by Ulrich Drepper.
2630 * STT_GNU_IFUNC is now supported in static executables.
2631 Implemented by H.J. Lu.
2633 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
2635 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
2636 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
2637 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
2638 Contributed by H.J. Lu.
2640 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
2641 Implemented by Ulrich Drepper.
2643 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
2645 Contributed by H.J. Lu.
2647 * Support for fma instruction in AVX on x86-64.
2648 Implemented by H.J. Lu and Ulrich Drepper.
2650 * AVX support in x86-64 auditing support in ld.so.
2651 Implemented by H.J. Lu.
2653 * STB_GNU_UNIQUE support added.
2654 Implemented by Ulrich Drepper.
2656 * Implement second fallback mode for optimized DNS lookup for even more
2657 broken environments. If two requests from the same port are not
2658 handled correctly close the socket and open a new one before sending
2659 the second request. The 'single-request-reopen' option in /etc/resolv.conf
2660 can be used to select this mode right away, instead of rediscovering the
2661 necessity is every process again.
2662 Implemented by Ulrich Drepper.
2664 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
2665 Implemented by Adam Tkac.
2667 * Optimized iconv conversions for S390x.
2668 Implemented by Andreas Krebbel.
2670 * Using condvars with PI mutexes is now more efficient due to kernel
2671 support for requeueing to PI futexes. NPTL support added for x86-64.
2672 Implemented by Ulrich Drepper.
2674 * New locales: ps_AF, my_MM
2678 * The following bugs are resolved with this release:
2680 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
2681 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
2682 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
2683 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
2684 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
2686 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
2687 Implemented by Ulrich Drepper.
2689 * New Linux interfaces: accept4, fallocate, fallocate64.
2690 Implemented by Ulrich Drepper.
2692 * Correct declarations of string function when used in C++ code. This
2693 could lead to compile errors for invalid C++ code.
2695 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
2698 * New POSIX 2008 interface: psiginfo
2699 Implemented by Ulrich Drepper.
2701 * New ISO C++1x interfaces: quick_exit, at_quick_exit
2702 Implemented by Ulrich Drepper.
2704 * Support for selecting between multiple function definitions at runtime
2705 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
2707 * The libcrypt library can now use the hash function implementations in
2708 NSS. Implemented by Ulrich Drepper.
2710 * The malloc implementation can be compiled to be less memory efficient
2711 but higher performing in multi-threaded programs.
2712 Implemented by Ulrich Drepper.
2714 * New locales: nan_TW@latin, ks_IN
2716 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
2717 Implemented by Ulrich Drepper.
2719 * Extended printf hook support. It is possible to use user-defined types
2720 and extend existing format specifiers.
2721 Implemented by Ulrich Drepper.
2723 * Handling for group shadow files has been added.
2724 Implemented by Ulrich Drepper.
2726 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
2727 servers (the case, e.g., for some people using the built-in DNS
2728 server in ADSL modems/routers). There is a once-per-process timeout
2729 in case of a broken server. To avoid it, users can run nscd or put
2730 'options single-request' in /etc/resolv.conf.
2731 Implemented by Ulrich Drepper.
2735 * The following bugs are resolved with this release:
2737 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
2738 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
2739 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
2740 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
2741 6968, 6974, 6980, 6995, 7008, 7009, 7029
2743 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
2744 up at the same time. Implemented by Ulrich Drepper.
2746 * TLS descriptors for LD and GD on x86 and x86-64.
2747 Implemented by Alexandre Oliva.
2749 * getaddrinfo now handles DCCP and UDPlite.
2750 Implemented by Ulrich Drepper.
2752 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
2753 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
2754 Implemented by Ulrich Drepper.
2756 * New implementation of memmem, strstr, and strcasestr which is O(n).
2757 Implemented by Eric Blake.
2759 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
2761 * Implement "e" option for popen to open file descriptor with the
2762 close-on-exec flag set. Implemented by Ulrich Drepper.
2764 * Implement "b" mode for fmemopen. In this mode writes writes don't
2765 implicitly add a NUL byte and seeks from the end of the buffer really
2766 use the buffer end, not the string length as the basis.
2767 Implemented by Ulrich Drepper.
2769 * Many functions, exported and internal, now atomically set the close-on-exec
2770 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
2772 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
2774 Implemented by Pravin Satpute.
2776 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
2780 * The following bugs are resolved with this release:
2782 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
2783 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
2784 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
2785 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
2786 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
2787 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
2788 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
2790 * New locales: bo_CN, bo_IN, shs_CA.
2792 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
2794 * Sorting rules for some Indian languages (Devanagari and Gujarati).
2795 Implemented by Pravin Satpute.
2797 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
2799 * nscd caches now all timeouts for DNS entries
2800 Implemented by Ulrich Drepper.
2802 * nscd is more efficient and wakes up less often.
2803 Implemented by Ulrich Drepper.
2805 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
2806 vdprintf, and obstack_vprintf.
2807 Implemented by Jakub Jelinek.
2809 * Faster memset for x86-64.
2810 Implemented by Harsha Jagasia and H.J. Lu.
2812 * Faster memcpy on x86.
2813 Implemented by Ulrich Drepper.
2815 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
2816 Implemented by Ulrich Drepper.
2818 * Faster sqrt and sqrtf implemention for some PPC variants.
2819 Implemented by Steven Munroe.
2823 * The following bugs are resolved with this release:
2825 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
2826 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
2827 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
2828 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
2829 5071, 5103, 5104, 5112, 5113, 5184, 5186
2831 * More checking functions: fread, fread_unlocked, open*, mq_open.
2832 Implemented by Jakub Jelinek and Ulrich Drepper.
2834 * Extend fortification to C++. Implemented by Jakub Jelinek.
2836 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
2837 by not recognizing 'a' as a modifier when those specs are requested.
2838 Implemented by Jakub Jelinek.
2840 * PPC optimizations to math and string functions.
2841 Implemented by Steven Munroe.
2843 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
2844 options to be passed. Implemented by Ulrich Drepper.
2846 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
2848 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
2849 Implemented by Ulrich Drepper.
2851 * Handle private futexes in the NPTL implementation.
2852 Implemented by Jakub Jelinek and Ulrich Drepper.
2854 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2855 Implemented by Roland McGrath and Ulrich Drepper.
2857 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2859 * SHA-256 and SHA-512 based password encryption.
2860 Implemented by Ulrich Drepper.
2862 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2863 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2866 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2867 Implemented by Ulrich Drepper.
2871 * The following bugs are resolved with this release:
2873 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2874 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2875 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2876 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2877 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2878 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2879 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2882 * New Linux interfaces: epoll_pwait, sched_getcpu.
2884 * New generic interfaces: strerror_l.
2886 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2890 * The following bugs are resolved with this release:
2892 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2893 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2894 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2895 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2896 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2897 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2898 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2899 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2900 3225, 3251, 3252, 3253, 3273
2902 * For Linux, the sorting of addresses returned by getaddrinfo now also
2903 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2904 Implemented by Ulrich Drepper.
2906 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2907 Implemented by Ulrich Drepper.
2909 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2911 * New iconv module for MIK. Contributed by Alexander Shopov.
2913 * For sites with broken group and/or passwd database, the auto-propagate
2914 option of nscd can prevent creating ID lookup entries from the results
2915 of a name lookup and vice versa. This usually is no problem but some
2916 site might have problems with the default behavior.
2917 Implemented by Ulrich Drepper.
2919 * Iterating over entire database in NIS can be slow. With the
2920 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2921 to trade time for memory. The entire database will be read at once.
2922 Implemented by Ulrich Drepper.
2924 * The interfaces introduced in RFC 3542 have been implemented by
2927 * Support for the new ELF hash table format was added by Ulrich Drepper.
2929 * Support for priority inheritance mutexes added by Jakub Jelinek and
2932 * Support for priority protected mutexes added by Jakub Jelinek.
2934 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2935 or_IN, csb_PL, fy_NL, sr_ME.
2939 * More overflow detection functions.
2941 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2942 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2944 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2945 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2946 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2947 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2948 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2949 by Masahide Washizawa.
2951 * It is now possible to install audit libraries for the dynamic linker using
2952 LD_AUDIT. Implemented by Ulrich Drepper.
2954 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2955 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2956 For a libc and libpthread that works well on Linux 2.4 kernels, we
2957 recommend using the stable 2.3 branch.
2959 * The new function open_wmemstream acts like open_memstream,
2960 but uses a wchar_t wide character buffer.
2962 * The new function ppoll is an improved version of poll, similar to pselect.
2964 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2965 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2966 renameat, unlinkat, linkat, symlinkat, readlinkat.
2968 * New Linux kernel system calls: unshare,
2969 inotify_init, inotify_add_watch, inotify_rm_watch.
2971 * The euidaccess function is now also known by the alias eaccess,
2972 for compatibility with some other systems.
2974 * Timezone data updated to 2006b version.
2978 * The following bugs are resolved with this release:
2980 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2981 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2982 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2983 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2984 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2985 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2987 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2989 * As of this release, GCC 4 can be used to compile the C Library.
2991 * Timezone data updated to 2005m version.
2995 * The following bugs are resolved with this release:
2997 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2998 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2999 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
3000 777, 787, 821, 822, 823, 825
3002 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3006 * Support for RFC 3678. Real implementations exist only for Linux so far.
3007 Implemented by Ulrich Drepper.
3009 * nscd can now cache entries persistently. Expiring entries are reloaded.
3010 For speedups the cache can be shared in memory with client processes.
3011 Implemented by Ulrich Drepper.
3013 * nscd can now perform SELinux checks.
3014 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
3016 * getaddrinfo queries are now cached. Canonical name lookup is performed
3018 Implemented by Ulrich Drepper.
3020 * The nothrow function attribute is used when headers are used by gcc when
3021 compiling C code. This can avoid significant amounts of exception
3024 * The malloc functions perform more error checking and are stricter when
3025 it comes to reacting on errors. The default action is to terminate
3026 the process after showing an error message. Implemented by Ulrich Drepper.
3028 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
3029 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
3031 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
3032 namespaces using the new function dlmopen(). This feature is of course,
3033 like most other dynamic loading functionality, not available in statically
3034 linked applications. Implemented by Ulrich Drepper.
3036 * Low-overhead boundary checking variants of string and some stdio functions
3037 were added. These are to be used in conjunction with a gcc patch by
3038 Jakub Jelinek which adds calls to these functions if possible.
3039 Implemented by Jakub Jelinek and Ulrich Drepper.
3041 * Old code for several operating systems and machine architectures that
3042 have not been in working condition in a long time have been removed from
3043 the main source tree maintained by the GNU C Library's maintainers.
3044 These files are now reside in the separate `ports' source module
3045 that is usable as an add-on when building the library.
3049 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
3050 interrogate the dynamic linker, compatible with the Solaris interface.
3052 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
3053 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
3055 * getifaddrs now uses the netlink interface on Linux to get its information.
3056 Implemented by Thorsten Kukuk.
3058 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
3059 Implemented by Ulrich Drepper.
3061 * support for non-executable stacks on x86 has been added. Changes mostly
3064 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
3067 * getaddrinfo now performs destination address selection according to
3072 * Thread-safe interfaces for many functions that access locale data
3073 were added in version 2.3, but these features were omitted from NEWS.
3074 Many functions have variants with an `_l' suffix that take a `locale_t'
3075 object as a parameter rather than consulting the current locale.
3076 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
3077 create and maintain `locale_t' objects. Additionally, the new function
3078 `uselocale' sets "the current locale" (as used by functions not so
3079 parameterized) set for an individual thread. These features were added
3080 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
3082 * The functions getresuid, getresgid, setresuid, and setresgid, which
3083 have long been available on Linux, are now declared in <unistd.h>
3084 and are now also available on the Hurd.
3086 * ELF thread-local storage support (TLS) now works on x86-64.
3088 * The new dynamic string token $LIB is expanded in shared library names.
3089 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
3091 * Aldy Hernandez contributed complete software floating point support for
3092 PowerPC machines with no FPU.
3094 * fexecve is implemented on Linux.
3096 * The `btowc' function should work at least twice as fast due to
3097 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
3099 * With approriate thread add-ons cancelable functions are now implemented
3100 in libc.so as well. No need to call the function in libpthread. This
3101 change allowed to finally disable the incorrect and expensive handling
3102 of weak definition in ld.so.
3104 * Yet more PLT entries in libc.so have been removed. We finally arrived
3105 at the bare minimum. Startup times improved appropriately.
3107 * Support for the new Linux/x86 system call interface was added. The
3108 AT_SYSINFO auxiliary vector entry is recognized and handled.
3112 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
3115 * iconv (the program and the interface) now accepts empty names (excluding
3116 options like //TRANSLIT) to mean "use charset of current locale".
3118 * localedef can now transliterate characters in strings which are not in
3119 the provided charmap. The information from the input locale is used.
3121 * Prelinking support was added for ELF targets. This requires additional
3122 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
3124 * Read-only stdio streams now use mmap to speed up operation by eliminating
3125 copying and buffer underflows. To use add 'm' to the mode string of
3126 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
3128 * The malloc functions were completely rewritten by Wolfram Gloger based
3129 on Doug Lea's malloc-2.7.0.c.
3131 * Isamu Hasegawa contributed a completely new and POSIX-conformant
3132 implementation of regex.
3134 * Bruno Haible upgraded the iconv and locale implementation to support
3137 * Contents of the LC_* and LANG environment variables in the CEN style are
3138 not recognized anymore. It never was used. Change by Ulrich Drepper.
3140 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
3141 thread-local storage (TLS) ABI on some platforms.
3142 Changes by Ulrich Drepper. SH support by Kaz Kojima.
3144 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
3145 EUC-JISX0213, and TSCII.
3147 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
3148 BSD-compatible interface for getting all network interface addresses.
3149 Implementation for IPv4 by Roland McGrath.
3151 * Loading of locale data is faster due to the introduction of a locale
3152 archive. Implemented by Roland McGrath and Ulrich Drepper.
3154 * Startup times are significantly reduced by not using exported functions
3155 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
3158 * Steven Munroe contributed a port to PowerPC64/Linux.
3162 * The Hurd now uses the GNU libio implementation of stdio rather than the
3163 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
3165 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
3166 with the same behavior as the Linux system call of the same name.
3170 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
3171 128-bit long double format.
3173 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
3174 IBM1161, and IBM1162 charsets.
3176 * Andreas Jaeger contributed a port to x86-64/Linux.
3178 * Peter Bruin contributed a port to PowerPC/Hurd.
3180 * libc functions using I/O streams now can handle wide-oriented streams
3183 * optimizations in the dynamic linker. Binaries created by recent binutils
3184 versions start up quicker due to reduced time spent on relocations.
3186 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
3190 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
3191 asinh, atanh, j0 for the 128-bit long double format.
3193 * Bruno Haible updated all the code handling Unicode in some form to
3194 support Unicode 3.1.
3196 * Speed of regex for single-byte locales is back to previous levels.
3197 Patch by Isamu Hasegawa.
3199 * Alpha, SPARC, and IA-64 now also using floating stacks.
3201 * Startup time of internationalized applications greatly improved through
3202 iconv cache. Use iconvconfig to generate the cache file.
3203 Contributed by Ulrich Drepper.
3205 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
3206 severe performance problems. Patch by David Mosberger.
3208 * The Hurd port got a lot more functionality like AIO, various stdio
3209 extensions, etc. Mainly done by Roland McGrath.
3211 * mtrace can now lookup symbols in shared libraries.
3215 * Intel's IA-64 math library is largely integrated. It provides fast and
3216 accurate implementatations for most basic and standard math functions
3217 in float, double, and long double format.
3219 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
3220 and asin for the 96-bit long double format and asin, log, tan for the
3221 128-bit long double format.
3223 * The beginning of a last-bit accurate math library by IBM Haifa were added.
3224 The basic double functions exist today. Contributed by Abraham Ziv
3225 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
3226 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
3228 * An asynchronous name lookup library was added. The interface is designed
3229 after POSIX AIO. The proposal was circulated beforehand to get comments.
3230 No negative ones came in. Implemented by Ulrich Drepper.
3232 * Port to S390/64bit contributed by Martin Schwidefsky
3233 <schwidefsky@de.ibm.com>.
3235 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3236 of functions for Linux/IA-64.
3238 * The RPC code is now thread safe. Threads can now use the same service
3239 of different services at the same time. Patch by Eric Norum
3240 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3242 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3243 family of functions for Linux/S390.
3245 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3246 of functions for Linux/x86.
3248 * Port to Linux/CRIS contributed by Axis Communications.
3252 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3253 we can now check for namespace violations and missing declarations. The
3254 result is that almost all headers are now Unix-compliant (as defined in
3255 the upcoming XPG6). The negative side is that some programs might need
3256 corrections, too, if they depend on the incorrect form of the headers in
3257 previous versions which defined too many symbols and included too many
3260 * regex now handles multibyte character sets correctly.
3261 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3263 * iconv (the program) does now conform to the upcoming XPG6 and handles
3264 charmaps. Instead of the charset names the path of charmaps can be
3265 provided and the conversion happens based on this data.
3266 Contributed by Ulrich Drepper.
3268 * The locale program now provides detailed information about the installed
3273 only lists the names of the supported locales
3277 provides details such as country, language, and codeset name.
3278 Contributed by Ulrich Drepper.
3282 * The gencat program now parses the input file according to the charset
3283 selected by the LC_CTYPE category. This is important for stateful
3284 character sets. To make generating catalogs easier there is a way
3285 to overwrite the charset selected by the locale: before the first
3286 message or $ quote line the catalog can contain a line like
3288 $ codeset=ISO-8859-2
3290 to select the charset (ISO-8859-2 in this case).
3292 Implemented by Shinya Hanataka and Ulrich Drepper.
3294 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3295 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3296 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3298 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3299 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3301 * The LANGUAGE environment variable is now ignored unless the locale is
3302 changed from the default "C" locale.
3304 * The usual bug fixes.
3308 * Greg McGary added runtime support for bounds checking using gcc's
3309 new -fbounded-pointers option. ix86 target is complete. PowerPC
3312 * Thorsten Kukuk added secure mode support to nscd.
3314 * The Berkeley db libraries have been removed.
3316 Related, the nss_db module is now in a separate package since it
3317 obviously requires a database library being available.
3319 * Wide character I/O streams implemented by Ulrich Drepper.
3321 * Functions from the extended socket API added by Ulrich Drepper.
3323 * Functions feenableexcept and fedisableexcept to control the
3324 behaviour of individual exceptions have been added by Andreas Jaeger.
3326 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3328 * The resolver code has been updated from bind 8.2.3-T5B which supports
3329 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3332 This change could in some situations effect backward compatibility. Since
3333 now `_res' is a thread-local instead of a global variable, modifying it
3334 in one thread does not have any effect in other threads.
3336 The resolver library was also extended to allow IPv6 as the transport
3337 protocol for the requests. This work was done by Stig Venaas.
3339 * Compatibility code for K&R C compilers has been removed from the
3340 header files. A ISO C compiler is needed to use the library
3341 (conforming to either C89 or C99 standard).
3343 * Complete rewrite of the localedef program to support multibyte character
3344 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3345 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3346 Implemented by Ulrich Drepper.
3348 Bruno Haible significantly improved the generation and use of the data
3349 structures for the wide character tables.
3351 * Plural handling in gettext implemented by Ulrich Drepper.
3353 * The utmp daemon has been removed.
3355 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3357 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3360 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3362 * POSIX barriers implemented by Kaz Kylheku.
3364 * POSIX spawn function family implemented by Ulrich Drepper.
3366 * POSIX spinlocks are now available.
3368 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3370 * the configure option --enable-kernel=X.Y.Z allows to strip out
3371 compatibility for kernel versions before X.Y.Z. This is currently only
3372 implemented for Linux.
3374 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3375 field sin6_scope_id. This means that all programs using IPv6 should be
3376 recompiled. Don't expect binary compatibility with previous glibc
3379 * various conversion modules for IBM character sets contributed by
3382 * IA-64 port by Jes Sorensen and HJ Lu.
3396 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3398 * New xdr functions are added; some rpc functions are now 64bit clean.
3400 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3402 * Fixed known incompatibilities with glibc 2.0.
3404 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3406 * Optimized a number of functions (especially the ELF dynamic loader).
3408 * Update timezone data files.
3410 * lots of charmaps corrections
3412 * some new locale definitions and charmaps
3417 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3418 conform to POSIX member type requirements. Symbol versions have been
3419 adjusted as needed within the library, and for direct use by applications,
3420 but there is potential for problems if third-party libraries use
3421 struct timeval as part of their interface. This does not present
3422 a problem for X and other "essential" system libraries.
3424 * An additional locale model to support C++ Standard Library locale
3425 model and probably more was implemented by Ulrich Drepper.
3427 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3430 * Miles Bader provided the `argp' function family to support hierachical
3431 command line argument parsing, layered on top of getopt.
3433 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3435 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3438 * scanf recognizes the %a and %A format for scanning floating point numbers.
3440 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3441 information and interfaces for the available integer types.
3443 * about 130 new math functions were added to implement the ISO C9x math
3446 * the new header <complex.h> contains definitions of the complex math
3447 functions from ISO C 9X.
3449 * the new header <tgmath.h> defines generic macros to use complex or
3450 real valued functions.
3452 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3454 * Andreas Jaeger provided a test suite for the math library.
3456 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
3458 * Ulrich Drepper added character set conversion functions (iconv).
3460 * Optimized string functions have been added.
3462 * The localedata addon is now part of glibc.
3464 * An implementation of profiling shared libraries was added by Ulrich Drepper.
3466 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
3467 daemon for NSS (nscd).
3469 Missing a better place here are some numbers on improvements. Under
3470 Linux 2.1.125 un-tar-ing the kernel sources takes
3474 using local files 12.19s 6.88s 22.91s
3476 using NIS 13.92s 8.91s 26.34s
3478 using NIS & nscd 10.37s 7.34s 25.30s
3480 using NIS+ 27.57s 30.37s 640.46s
3482 using NIS+ & nscd 10.25s 7.83s 26.51s
3484 using NIS & old nscd [1] 13.83s 8.32s 29.60s
3486 Keep in mind that non-namelookup related operations dominate above times.
3487 It was just a common complain that using NIS+ unpacking the kernel is
3490 [1] The old nscd implementation is not available anymore since it was
3491 distributed with glibc up to version 2.0.98 and thus is now replaced.
3493 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
3495 * Mark Kettenis provided a Hesiod NSS module.
3497 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
3498 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
3500 * rcmd can now handle netgroups (Dick Streefland).
3502 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
3505 * Support for the IPv6 protocol has been added to the socket API, as per the
3506 latest draft standards.
3508 * Support for Linux 2.2 has been added.
3510 * Interface changes relative to the latest 2.0.x release:
3511 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3512 addseverity NEW: Unix98
3513 alphasort64 NEW: LFS
3514 argp_err_exit_status NEW: argp, GNU ext
3515 argp_error NEW: argp, GNU ext
3516 argp_failure NEW: argp, GNU ext
3517 argp_help NEW: argp, GNU ext
3518 argp_parse NEW: argp, GNU ext
3519 argp_program_bug_address NEW: argp, GNU ext
3520 argp_program_version NEW: argp, GNU ext
3521 argp_program_version_hook NEW: argp, GNU ext
3522 argp_state_help NEW: argp, GNU ext
3523 argp_usage NEW: argp, GNU ext
3524 authdes_create NEW: Secure RPC
3525 authdes_getucred NEW: Secure RPC
3526 authdes_pk_create NEW: Secure RPC
3527 backtrace NEW: GNU ext.
3528 backtrace_symbols NEW: GNU ext.
3529 backtrace_symbols_fd NEW: GNU ext.
3531 cacosf NEW: ISO C 9x
3532 cacosh NEW: ISO C 9x
3533 cacoshf NEW: ISO C 9x
3534 cacoshl NEW: ISO C 9x
3535 cacosl NEW: ISO C 9x
3542 casinf NEW: ISO C 9x
3543 casinh NEW: ISO C 9x
3544 casinhf NEW: ISO C 9x
3545 casinhl NEW: ISO C 9x
3546 casinl NEW: ISO C 9x
3548 catanf NEW: ISO C 9x
3549 catanh NEW: ISO C 9x
3550 catanhf NEW: ISO C 9x
3551 catanhl NEW: ISO C 9x
3552 catanl NEW: ISO C 9x
3553 cbc_crypt NEW: Secure RPC
3557 ccoshf NEW: ISO C 9x
3558 ccoshl NEW: ISO C 9x
3564 cimagf NEW: ISO C 9x
3565 cimagl NEW: ISO C 9x
3566 clearerr_locked REMOVED
3567 clntunix_create NEW: sunrpc ext
3569 clog10 NEW: ISO C 9x
3570 clog10f NEW: ISO C 9x
3571 clog10l NEW: ISO C 9x
3581 cprojf NEW: ISO C 9x
3582 cprojl NEW: ISO C 9x
3584 crealf NEW: ISO C 9x
3585 creall NEW: ISO C 9x
3590 csinhf NEW: ISO C 9x
3591 csinhl NEW: ISO C 9x
3594 csqrtf NEW: ISO C 9x
3595 csqrtl NEW: ISO C 9x
3599 ctanhf NEW: ISO C 9x
3600 ctanhl NEW: ISO C 9x
3602 des_setparity NEW: Secure RPC
3603 ecb_crypt NEW: Secure RPC
3604 endutxent NEW: Unix98
3606 exp10f NEW: ISO C 9x
3607 exp10l NEW: ISO C 9x
3611 fattach NEW: STREAMS
3612 fdetach NEW: STREAMS
3616 feclearexcept NEW: ISO C 9x
3617 fegetenv NEW: ISO C 9x
3618 fegetexceptflag NEW: ISO C 9x
3619 fegetround NEW: ISO C 9x
3620 feholdexcept NEW: ISO C 9x
3622 feraiseexcept NEW: ISO C 9x
3623 ferror_locked REMOVED
3624 fesetenv NEW: ISO C 9x
3625 fesetexceptflag NEW: ISO C 9x
3626 fesetround NEW: ISO C 9x
3627 fetestexcept NEW: ISO C 9x
3628 feupdateenv NEW: ISO C 9x
3629 fflush_locked REMOVED
3633 fgets_unlocked NEW: GNU ext.
3634 fileno_locked REMOVED
3646 fputc_locked REMOVED
3647 fputs_unlocked NEW: GNU ext.
3648 fread_unlocked NEW: GNU ext.
3653 fstatvfs NEW: Unix98
3657 ftruncate64 NEW: LFS
3659 fwrite_unlocked NEW: GNU ext.
3660 gai_strerror NEW: IPv6
3664 getchar_locked REMOVED
3666 getdate_err NEW: Unix98
3667 getdate_r NEW: GNU ext.
3669 getnameinfo NEW: IPv6
3670 getnetname NEW: Secure RPC
3671 getpmsg NEW: STREAMS
3672 getpt NEW: Unix98 PTY
3673 getrlimit64 NEW: LFS
3674 getutxent NEW: Unix98
3675 getutxid NEW: Unix98
3676 getutxline NEW: Unix98
3677 glob64 NEW: GNU ext.
3678 globfree64 NEW: GNU ext.
3679 gnu_get_libc_release NEW: GNU ext.
3680 gnu_get_libc_version NEW: GNU ext.
3681 grantpt NEW: Unix98 PTY
3682 host2netname NEW: Secure RPC
3684 iconv_close NEW: iconv
3685 iconv_open NEW: iconv
3686 if_freenameindex NEW: IPv6
3687 if_indextoname NEW: IPv6
3688 if_nameindex NEW: IPv6
3689 if_nametoindex NEW: IPv6
3690 in6addr_any NEW: IPv6
3691 in6addr_loopback NEW: IPv6
3692 inet6_isipv4mapped NEW: IPv6
3693 isastream NEW: STREAMS
3694 iswblank NEW: GNU ext.
3695 key_decryptsession NEW: Secure RPC
3696 key_decryptsession_pk NEW: Secure RPC
3697 key_encryptsession NEW: Secure RPC
3698 key_encryptsession_pk NEW: Secure RPC
3699 key_gendes NEW: Secure RPC
3700 key_get_conv NEW: Secure RPC
3701 key_secretkey_is_set NEW: Secure RPC
3702 key_setnet NEW: Secure RPC
3703 key_setsecret NEW: Secure RPC
3704 llrint NEW: ISO C 9x
3705 llrintf NEW: ISO C 9x
3706 llrintl NEW: ISO C 9x
3707 llround NEW: ISO C 9x
3708 llroundf NEW: ISO C 9x
3709 llroundl NEW: ISO C 9x
3714 lrintf NEW: ISO C 9x
3715 lrintl NEW: ISO C 9x
3716 lround NEW: ISO C 9x
3717 lroundf NEW: ISO C 9x
3718 lroundl NEW: ISO C 9x
3720 makecontext NEW: Unix98
3721 mempcpy NEW: GNU ext.
3724 modify_ldt NEW: kernel
3728 nearbyint NEW: ISO C 9x
3729 nearbyintf NEW: ISO C 9x
3730 nearbyintl NEW: ISO C 9x
3731 netname2host NEW: Secure RPC
3732 netname2user NEW: Secure RPC
3733 nexttoward NEW: ISO C 9x
3734 nexttowardf NEW: ISO C 9x
3735 nexttowardl NEW: ISO C 9x
3739 passwd2des NEW: Secure RPC
3741 pow10f NEW: GNU ext.
3742 pow10l NEW: GNU ext.
3745 printf_size NEW: GNU ext.
3746 printf_size_info NEW: GNU ext.
3747 profil_counter REMOVED
3748 pthread_mutexattr_getkind_np REPLACED
3749 pthread_mutexattr_setkind_np REPLACED
3750 ptsname NEW: Unix98 PTY
3751 ptsname_r NEW: Unix98 PTY
3753 putchar_locked REMOVED
3754 putgrent NEW: GNU ext.
3756 putpmsg NEW: STREAMS
3757 pututxline NEW: Unix98
3761 readdir64_r NEW: LFS
3762 remquo NEW: ISO C 9x
3763 remquof NEW: ISO C 9x
3764 remquol NEW: ISO C 9x
3766 roundf NEW: ISO C 9x
3767 roundl NEW: ISO C 9x
3769 scalbln NEW: ISO C 9x
3770 scalblnf NEW: ISO C 9x
3771 scalblnl NEW: ISO C 9x
3773 sendfile NEW: kernel
3774 setcontext NEW: Unix98
3775 setrlimit64 NEW: LFS
3776 setutxent NEW: Unix98
3778 sigignore NEW: Unix98
3779 sigqueue NEW: POSIX.1b
3780 sigrelse NEW: Unix98
3781 sigset NEW: POSIX.1b
3782 sigtimedwait NEW: POSIX.1b
3783 sigwaitinfo NEW: POSIX.1b
3784 sincos NEW: GNU ext.
3785 sincosf NEW: GNU ext.
3786 sincosl NEW: GNU ext.
3790 strcasestr NEW: GNU ext.
3791 strtoimax NEW: ISO C 9x
3792 strtoumax NEW: ISO C 9x
3793 strverscmp NEW: GNU ext.
3794 svcauthdes_stats NEW: Secure RPC
3795 svcunix_create NEW: sunrpc etx
3796 svcunixfd_create NEW: sunrpc ext
3797 swapcontext NEW: Unix98
3798 tcgetsid NEW: Unix98 PTY
3799 tdestroy NEW: GNU ext.
3800 tgamma NEW: ISO C 9x
3801 tgammaf NEW: ISO C 9x
3802 tgammal NEW: ISO C 9x
3806 truncf NEW: ISO C 9x
3807 truncl NEW: ISO C 9x
3809 unlockpt NEW: Unix98 PTY
3810 updwtmpx NEW: Unix98
3811 user2netname NEW: Secure RPC
3812 utmpxname NEW: Unix98
3813 versionsort NEW: GNU ext.
3814 versionsort64 NEW: GNU ext.
3816 wcscasecmp NEW: GNU ext.
3817 wcsncasecmp NEW: GNU ext.
3818 wcsnlen NEW: GNU ext.
3819 wcstoimax NEW: ISO C 9x
3820 wcstoll NEW: ISO C 9x
3821 wcstoull NEW: ISO C 9x
3822 wcstoumax NEW: ISO C 9x
3824 wordexp NEW: POSIX.2
3825 wordfree NEW: POSIX.2
3826 write_profiling REMOVED
3827 xdecrypt NEW: Secure RPC
3828 xdr_authdes_cred NEW: Secure RPC
3829 xdr_authdes_verf NEW: Secure RPC
3830 xdr_cryptkeyarg NEW: Secure RPC
3831 xdr_cryptkeyarg2 NEW: Secure RPC
3832 xdr_cryptkeyres NEW: Secure RPC
3833 xdr_getcredres NEW: Secure RPC
3834 xdr_key_netstarg NEW: Secure RPC
3835 xdr_key_netstres NEW: Secure RPC
3836 xdr_keybuf NEW: Secure RPC
3837 xdr_keystatus NEW: Secure RPC
3838 xdr_netnamestr NEW: Secure RPC
3839 xdr_sizeof NEW: Secure RPC
3840 xdr_unixcred NEW: sunrpc ext
3841 xencrypt NEW: Secure RPC
3842 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3853 * inet_ntoa is thread-safe
3855 * updwtmp is moved from libutil to libc
3857 * rewrite of cbrt function
3859 * update of timezone data
3873 * add atoll function
3875 * fix complex problems in Berkeley DB code
3877 * fix math functions
3881 * fixed lots of header problems (especially Linux/GNU specific)
3883 * dynamic loader preserves all registers
3885 * Roland McGrath provided support for handling of auxiliary objects in
3886 the ELF dynamic loader.
3888 * support for parallel builds is improved
3892 * GNU extensions are no longer declared by default. To enable them you
3893 must define the macro `_GNU_SOURCE' in your program or compile with
3896 * The library has changed from using GNU ld symbol aliases to using weak
3897 symbols where available. The ELF object file format supports weak
3898 symbols; GNU ld also supports weak symbols in the a.out format. (There
3899 is also now support for other GNU ld extensions in ELF. Use the
3900 `--with-elf' option to configure to indicate you have ELF, and
3901 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3902 of many files which contained only symbol aliases, reducing the size of
3903 the source and the compiled library; many other files were renamed to
3904 less cryptic names previously occupied by the symbol alias files.
3905 There is a new header file <elf.h> for programs which operate on
3906 files in the ELF format.
3908 * Converted to Autoconf version 2, so `configure' has more options.
3909 Run `configure --help' to see the details.
3911 * The library can now be configured to build profiling, highly-optimized
3912 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3913 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3914 `configure' enable building these extra libraries. The shared library is
3915 built by default when using both ELF and GNU ld. When shared libraries
3916 are enabled, the new library `-ldl' is available for arbitrary run-time
3917 loading of shared objects; its interface is defined in <dlfcn.h>. The
3918 new header file <link.h> gives access to the internals of the run-time
3919 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3920 application of same name on other systems and it provides information
3921 about dynamically linked binaries.
3923 * The C library now provides the run-time support code for profiling
3924 executables compiled with `-pg'. Programs can control the profiling code
3925 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3926 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3927 the support for this file format was contributed by David Mosberger-Tang.
3929 * The math code has been replaced with a math library based on fdlibm from
3930 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3931 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3932 functions. The math functions now reside in a separate library, so
3933 programs using them will need to use `-lm' their linking commands.
3935 * John C. Bowman contributed optimized ix87 assembler inline functions.
3937 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3938 mechanism similar to that found in Solaris 2. This is now used for the
3939 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3940 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3941 file controls what services are used for each individual database. This
3942 works by loading shared libraries with names specified in `nsswitch.conf',
3943 so service modules can be changed or added at any time without even
3944 relinking any program. Currently there are the file, db, and NIS based
3945 NSS services available.
3947 * The new functions `strtoq' and `strtouq' parse integer values from
3948 strings, like `strtol' and `strtoul', but they return `long long int' and
3949 `unsigned long long int' values, respectively (64-bit quantities).
3951 * The new functions `strtof' and `strtold' parse floating-point values from
3952 strings, like `strtod', but they return `float' and `long double' values,
3953 respectively (on some machines `double' and `long double' are the same).
3955 * Ulrich Drepper has contributed new implementations of the floating-point
3956 printing and reading code used in the `printf' family of functions and
3957 `strtod', `strtof', and `strtold'. These new functions are perfectly
3958 accurate, and much faster than the old ones.
3960 * The implementation of the POSIX locale model was completely rewritten by
3961 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3962 to compile the POSIX locale definition.
3964 * The former dummy implementations of the strcoll and strxfrm function are
3965 now replaced by fully functional code contributed by Ulrich Drepper. The
3966 collation information comes from the POSIX locale definitions.
3968 * The new header <langinfo.h> defines an interface for accessing
3969 various locale-dependent data (using the locale chosen with `setlocale').
3971 * Ulrich Drepper has contributed a new suite of functions for operation on
3972 wide-character and multibyte-character strings, in <wchar.h>;
3973 and classification and case conversion of wide characters, in <wctype.h>.
3974 These new functions are conforming to the ISO C, Amendement 1 specification.
3976 * There is now a second implementation of the standard I/O library available.
3977 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3978 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3980 * You can now use positional parameter specifications in format strings
3981 for the `printf' and `scanf' families of functions. For example,
3982 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3983 ``Number 6, Mr Jones''. This is mainly useful when providing different
3984 format strings for different languages, whose grammars may dictate
3985 different orderings of the values being printed. To support this
3986 feature, the interface for `register_printf_handler' has changed; see
3987 the header file <printf.h> for details.
3989 * The `printf' and `scanf' families of functions now understand a new
3990 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3991 to group numbers as indicated by the locale; for `scanf' and friends, this
3992 says to accept as valid only a number with all the proper grouping
3993 separators in the right places. In the default "C" locale, numbers are
3994 not grouped; but locales for specific countries will define the usual
3995 conventions (i.e. separate thousands with `,' in the US locale).
3997 * The pgrp functions have been regularized, slightly incompatibly but much
3998 less confusingly. The core functions are now `getpgid' and `setpgid',
3999 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
4000 argument) and BSD `setpgrp' (identical to `setpgid') functions are
4001 provided for compatibility. There is no longer an incompatible `getpgrp'
4002 with an argument declared under _BSD_SOURCE; no BSD code uses it.
4004 * The new header file <fts.h> and suite of functions simplify programs that
4005 operate on directory trees. This code comes from 4.4 BSD.
4007 * The resolver code has been updated from the BIND 4.9.5-P1 release.
4008 Parts of the code were heavily modified by Ulrich Drepper to fit in the
4009 NSS scheme used in glibc.
4011 * There is a new malloc debugging hook `__memalign_hook'.
4013 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
4014 `unsigned int' in <sys/types.h>. These are for compatibility only and
4015 their use is discouraged.
4017 * The `-lmcheck' library to enable standard malloc debugging hooks is now
4018 done differently, so that it works even without GNU ld.
4020 * New function `euidaccess' checks allowed access to a file like `access',
4021 but using the effective IDs instead of the real IDs.
4023 * The time zone data files have been updated for the latest and greatest
4024 local time conventions of the countries of the world.
4026 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
4029 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
4030 for formatting floating-point numbers. They are provided only for
4031 compatibility; new programs should use `sprintf' instead. There are
4032 also equivalent function for the `long double' floating-point type and
4033 all functions also exist in a reentrant form.
4035 * The new auxiliary library `-lutil' from 4.4 BSD contains various
4036 functions for maintaining the login-record files (primarily of use to
4037 system programs such as `login'), and convenient functions for
4038 allocating and initializing a pseudo-terminal (pty) device.
4040 * Ulrich Drepper has contributed new support for System V style
4041 shared memory and IPC on systems that support it.
4043 * Ulrich Drepper has contributed several miscellaneous new functions found
4044 in System V: The `hsearch' family of functions provide an effective
4045 implementation of hash tables; `a64l' and `l64a' provide a very simple
4046 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
4049 * Ulrich Drepper has contributed new reentrant counterparts for the
4050 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
4052 * Ulrich Drepper has contributed new, highly-optimized versions of several
4053 string functions for the i486/Pentium family of processors.
4055 * Ulrich Drepper has updated the Linux-specific code, based largely
4056 on work done in Hongjiu Lu's version of GNU libc for Linux.
4057 The GNU library now supports Linux versions 2.0.10 and later,
4058 using the ELF object file format (i[3456]86-*-linux).
4060 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
4062 * David Mosberger-Tang and Richard Henderson have ported the C library
4063 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
4064 dynamic linking support for ELF/Alpha.
4066 * Richard Henderson contributed several Alpha optimized assembler function
4067 for arithmetic and string handling.
4069 * Ulrich Drepper has contributed a new set of message catalog functions to
4070 support multiple languages using the <libintl.h> interface, for use with
4071 his new package GNU gettext. Translation volunteers have contributed
4072 catalogs of the library's messages in Spanish, German, and Korean.
4074 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
4075 program and the `catgets' function for reading the catalog files it
4076 creates. (The <libintl.h> interface is preferred; we include the
4077 <nl_types.h> interface using `catgets' only for source compatibility with
4078 programs already written to use it.)
4080 * New header file <values.h> gives SVID-compatible names for <limits.h>
4083 * Various new macros, declarations, and small header files for compatibility
4086 * New function `group_member' is a convenient way to check if a process has
4087 a given effective group ID.
4089 * When using GCC 2.7 and later, the socket functions are now declared in a
4090 special way so that passing an argument of type `struct sockaddr_in *',
4091 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
4092 `struct sockaddr *' type, does not generate a type-clash warning.
4094 * New function `error' declared in header file <error.h> is a convenient
4095 function for printing error messages and optionally exiting; this is the
4096 canonical function used in GNU programs. The new functions `err', `warn',
4097 and friends in header file <err.h> are the canonical 4.4 BSD interface for
4098 doing the same thing.
4100 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
4101 POSIX.2 `glob' function to do ~ and {...} expansion.
4103 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
4104 `clearenv' which is used in POSIX.9 is also available.
4106 * New function `getsid' returns session ID number on systems that support it.
4108 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
4109 files <db.h> and <mpool.h> provide a rich set of functions for several
4110 types of simple databases stored in memory and in files, and <ndbm.h> is
4111 an old `ndbm'-compatible interface using the `db' functions. Link with
4112 `-ldb' to get these functions.
4114 * New macro `strdupa' copies a string like `strdup', but uses local stack
4115 space from `alloca' instead of dynamic heap space from `malloc'.
4117 * New function `strnlen' is like `strlen' but searches only a given maximum
4118 number of characters for the null terminator. `stpncpy', `strndup' and
4119 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
4122 * New function `statfs' in header <sys/statfs.h>.
4124 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
4125 provide convenient functions for operating on blocks of null-terminated
4128 * A new suite of functions in <utmp.h> handle all the details of reading
4129 and writing the utmp file.
4131 * An implementation of the NIS/YP(tm) based NSS service was contributed by
4134 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
4135 completely POSIX compliant and also implemented the extended functionality
4136 to handle alternate digit representation and alternate era date formats.
4138 * Ulrich Drepper provided an implementation of the `strptime' function
4139 defined in XPG4.2 which transforms a string into a `struct tm' value.
4141 * Paul Eggert provided the tzselect shell script as part of the timezone
4142 code. The shell script makes it easy to select the correct timezone
4145 * The implementation of the malloc family of functions is completely replaced
4146 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
4147 The implementation uses the mmap function (if available) and it is
4148 optimized for the use in multi threaded programs.
4150 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
4151 functions. This new functionality is usable by specifying a special
4152 salt string and it is compatible with implementation on *BSD systems.
4154 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
4155 `getsubopt' to handle second level command line options, `bsd_signal'
4156 to access BSD style `signal' functionality, the obsolete `regexp' style
4159 * the `lchown' function is available on system which support this
4162 * The implementation of the shadow password handling function was contributed
4165 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
4167 * POSIX.1g support was added. The <sys/select.h> header is available,
4168 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
4169 implementation of `getaddrinfo'.
4173 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
4175 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
4176 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
4178 * The new function `daemon' from 4.4 BSD is useful for server programs that
4179 want to put themselves in the background.
4181 * Joel Sherrill has contributed support for several standalone boards that
4182 run without an operating system.
4184 * `printf', `scanf' and friends now accept a `q' type modifier for long
4185 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
4187 * All of the code taken from BSD (notably most of the math and networking
4188 routines) has been updated from the BSD 4.4-Lite release.
4190 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
4192 * The new functions `getdomainname' and `setdomainname' fetch or change the
4193 YP/NIS domain name. These are system calls which exist on systems which
4196 * The time zone data files have been updated for the latest international
4199 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
4200 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
4204 * The C library now includes support for Sun RPC, from Sun's free
4205 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
4206 are included. (There is still no support for YP.)
4208 * Tom Quinn has contributed a port of the C library to SGI machines running
4209 Irix 4 (mips-sgi-irix4).
4211 * The new `lockf' function is a simplified interface to the locking
4212 facilities of `fcntl', included for compatibility.
4214 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
4216 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
4218 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
4221 * The error message printed by `assert' for a failed assertion now includes
4222 the name of the program (if using GNU ld) and the name of the calling
4223 function (with versions of GCC that support this).
4225 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
4227 * The library now includes the <sys/mman.h> header file and memory
4228 management functions `mmap', `munmap', `mprotect', `msync', and
4229 `madvise', on systems that support those facilities.
4231 * The interface for `mcheck' has changed slightly: the function called to
4232 abort the program when an allocation inconsistency is detected now takes
4233 an argument that indicates the type of failure. The new function
4234 `mprobe' lets you request a consistency check for a particular block at
4235 any time (checks are normally done only when you call `free' or `realloc'
4238 * It is now possible to easily cross-compile the C library, building on one
4239 system a library to run on another machine and/or operating system. All
4240 you need to do is set the variable `HOST_CC' in `configparms' to the
4241 native compiler for programs to run on the machine you are building on (a
4242 few generator programs are used on Unix systems); set `CC' to the
4245 * The new function `fexecve' (only implemented on the GNU system) executes
4246 a program file given a file descriptor already open on the file.
4250 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4251 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4253 * You can set the variable `libprefix' in `configparms' to specify a prefix
4254 to be prepended to installed library files; this makes it easy to install
4255 the GNU C library to be linked as `-lgnuc' or whatever.
4257 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4258 copies a limited number of characters from a string, and returns the
4259 address of the last character written.
4261 * You no longer need to check for whether the installed `stddef.h' is
4262 compatible with the GNU C library. configure now checks for you.
4264 * You can now define a per-stream `fileno' function to convert the
4265 stream's cookie into an integral file descriptor.
4267 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4268 allocates zero bytes of storage, and returns a unique pointer which
4269 you can pass to `realloc' or `free'. The behavior is undefined if
4270 you dereference this pointer.
4272 * The C library now runs on Sony NEWS m68k machines running either
4273 NewsOS 3 or NewsOS 4.
4275 * The new `syscall' function is a system-dependent primitive function
4276 for invoking system calls. It has the canonical behavior on Unix
4277 systems, including unreliable return values for some calls (such as
4278 `pipe', `fork' and `getppid').
4280 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4281 to `EAGAIN', which is the preferred name. On systems whose kernels
4282 use two distinct codes, the C library now translates EWOULDBLOCK to
4283 EAGAIN in every system call function.
4287 * The GNU C Library Reference Manual is now distributed with the library.
4288 `make dvi' will produce a DVI file of the printed manual.
4289 `make info' will produce Info files that you can read on line using C-h i
4290 in Emacs or the `info' program.
4291 Please send comments on the manual to bug-glibc-manual@gnu.org.
4293 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4295 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4297 * Jason Merrill has contributed a port to the Sequent Symmetry running
4298 Dynix version 3 (i386-sequent-dynix).
4300 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4301 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4303 * New function `memory_warnings' lets you arrange to get warnings when
4304 malloc is running out of memory to allocate, like Emacs gives you.
4306 * The C library now contains the relocating allocator used in Emacs 19 for
4307 its editing buffers. This allocator (ralloc) minimizes allocation
4308 overhead and fragmentation by moving allocated regions around whenever it
4309 needs to. You always refer to a ralloc'd region with a "handle" (a
4310 pointer to a pointer--an object of type `void **').
4312 * There is a new `printf' format: `%m' gives you the string corresponding
4313 to the error code in `errno'.
4315 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4316 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4317 pass, the `a' modifier says to fill in a `char **' you pass with a
4320 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4321 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4322 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4324 * `mkstemp' is a traditional Unix function to atomically create and open a
4325 uniquely-named temporary file.
4329 * The standard location for the file that says what the local timezone is
4330 has changed again. It is now `/usr/local/etc/localtime' (or more
4331 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4333 * The distribution no longer contains any files with names longer than 14
4336 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4337 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4339 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4343 * The configuration process has changed quite a bit. The `configure'
4344 script is now used just like the configuration scripts for other GNU
4345 packages. The `sysdeps' directory hierarchy is much rearranged.
4346 The file `INSTALL' explains the new scheme in detail.
4348 * The header files no longer need to be processed into ANSI C and
4349 traditional C versions. There is just one set of files to install, and
4350 it will work with ANSI or old C compilers (including `gcc -traditional').
4352 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4353 MIPS DECStation running Ultrix 4.
4355 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4356 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4357 made itself into a shared library.
4359 * Yet further improved support for the i386, running 4.3 BSD-like systems
4360 (such as Mach 3 with the Unix single-server), or System V.
4362 * New function `strncasecmp' to do case-insensitive string comparison
4363 with limited length.
4365 * New function `strsep' is a reentrant alternative to `strtok'.
4367 * New functions `scandir' and `alphasort' for searching directories.
4369 * New function `setenv' is a better interface to `putenv'.
4371 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4372 function for traversing a directory tree.
4374 * The GNU obstack package is now also part of the C library.
4375 The new function `open_obstack_stream' creates a stdio stream that
4376 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4377 formatted output directly to an obstack.
4379 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4380 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4382 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4384 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4385 things to your strings.
4387 * There are some new test programs: test-fseek, testmb, and testrand.
4389 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4390 These ports are not finished, but are a good starting place for really
4391 supporting those systems.
4393 * `/etc/localtime' is now the standard location for the file that says what
4394 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4395 This follows the general principle that `/etc' is the place for all local
4396 configuration files.
4398 * The C library header files now use `extern "C"' when used by the C++
4399 compiler, so the C library should now work with C++ code.
4401 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4402 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4405 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4406 function which uses the `merge sort' algorithm, and is said to be
4407 significantly faster than the old GNU `qsort' function. Merge sort is
4408 now the standard `qsort' function. The new algorithm can require a lot
4409 of temporary storage; so, the old sorting function is called when the
4410 required storage is not available.
4412 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4413 provides the Unix `crypt' function, plus some other entry points.
4415 * The code and header files taken from 4.4 BSD have been updated with the
4416 latest files released from Berkeley.
4418 ----------------------------------------------------------------------
4419 Copyright information:
4421 Copyright (C) 1992-2018 Free Software Foundation, Inc.
4423 Permission is granted to anyone to make or distribute verbatim copies
4424 of this document as received, in any medium, provided that the
4425 copyright notice and this permission notice are preserved,
4426 thus giving the recipient permission to redistribute in turn.
4428 Permission is granted to distribute modified versions
4429 of this document, or of portions of it,
4430 under the above conditions, provided also that they
4431 carry prominent notices stating who last changed them.
4434 version-control: never