Open master branch for glibc 2.25 development

Open master branch for glibc 2.26 development

Last change to the ports tree before the merge into glibc master

FROM: Siddhesh Poyarekar <siddhesh@sourceware.org>
SUBJECT: The GNU C Library version 2.26 is now available

The GNU C Library
=================

The GNU C Library version 2.26 is now available.

The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.26 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.26
=====================

Major new features:

* A per-thread cache has been added to malloc. Access to the cache requires
  no locks and therefore significantly accelerates the fast path to allocate
  and free small amounts of memory. Refilling an empty cache requires locking
  the underlying arena. Performance measurements show significant gains in a
  wide variety of user workloads. Workloads were captured using a special
  instrumented malloc and analyzed with a malloc simulator. Contributed by
  DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.

* Unicode 10.0.0 Support: Character encoding, character type info, and
  transliteration tables are all updated to Unicode 10.0.0, using
  generator scripts contributed by Mike FABIAN (Red Hat).
  These updates cause user visible changes, especially the changes in
  wcwidth for many emoji characters cause problems when emoji sequences
  are rendered with pango, see for example:
  https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5

* Collation of Hungarian has been overhauled and is now consistent with "The
  Rules of Hungarian Orthography, 12th edition" (Bug 18934).  Contributed by
  Egmont Koblinger.

* Improvements to the DNS stub resolver, contributed by Florian Weimer:

  - The GNU C Library will now detect when /etc/resolv.conf has been
    modified and reload the changed configuration.  The new resolver option
    “no-reload” (RES_NORELOAD) disables this behavior.

  - The GNU C Library now supports an arbitrary number of search domains
    (configured using the “search” directive in /etc/resolv.conf);
    previously, there was a hard limit of six domains.  For backward
    compatibility, applications that directly modify the ‘_res’ global
    object are still limited to six search domains.

  - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
    Library will now randomly pick a name server from the configuration as a
    starting point.  (Previously, the second name server was always used.)

* The tunables feature is now enabled by default.  This allows users to tweak
  behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.

* New function reallocarray, which resizes an allocated block (like realloc)
  to the product of two sizes, with a guaranteed clean failure upon integer
  overflow in the multiplication.  Originally from OpenBSD, contributed by
  Dennis Wölfing and Rüdiger Sonderfeld.

* New wrappers for the Linux-specific system calls preadv2 and pwritev2.
  These are extended versions of preadv and pwritev, respectively, taking an
  additional flags argument.  The set of supported flags depends on the
  running kernel; full support currently requires kernel 4.7 or later.

* posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
  create a new session ID for the spawned process.  This feature is
  scheduled to be added to the next major revision of POSIX; for the time
  being, it is available under _GNU_SOURCE.

* errno.h is now safe to use from C-preprocessed assembly language on all
  supported operating systems.  In this context, it will only define the
  Exxxx constants, as preprocessor macros expanding to integer literals.

* On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
  128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
  754-2008) and ISO/IEC TS 18661-3:2015.  Contributed by Paul E. Murphy,
  Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.

  To compile programs that use this feature, the compiler must support
  128-bit floating point with the type name _Float128 (as defined by TS
  18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
  C prior to version 7).  _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
  must be defined to make the new interfaces visible.

  The new functions and macros correspond to those present for other
  floating-point types (except for a few obsolescent interfaces not
  supported for the new type), with F128 or f128 suffixes; for example,
  strtof128, HUGE_VAL_F128 and cosf128.  Following TS 18661-3, there are no
  printf or scanf formats for the new type; the strfromf128 and strtof128
  interfaces should be used instead.

Deprecated and removed features, and other changes affecting compatibility:

* The synchronization that pthread_spin_unlock performs has been changed to
  now be equivalent to a C11 atomic store with release memory order to the
  spin lock's memory location.  Previously, several (but not all)
  architectures used stronger synchronization (e.g., containing what is
  often called a full barrier).  This change can improve performance, but
  may affect odd fringe uses of spin locks that depend on the previous
  behavior (e.g., using spin locks as atomic variables to try to implement
  Dekker's mutual exclusion algorithm).

* The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
  removed.

* Sun RPC is deprecated.  The rpcgen program, librpcsvc, and Sun RPC headers
  will only be built and installed when the GNU C Library is configured with
  --enable-obsolete-rpc.  This allows alternative RPC implementations, such
  as TIRPC or rpcsvc-proto, to be used.

* The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
  libnss_compat, are deprecated, and will not be built or installed by
  default.

  The NIS(+) support library, libnsl, is also deprecated.  By default, a
  compatibility shared library will be built and installed, but not headers
  or development libraries. Only a few NIS-related programs require this
  library.  (In particular, the GNU C Library has never required programs
  that use 'gethostbyname' to be linked with libnsl.)

  Replacement implementations based on TIRPC, which additionally support
  IPv6, are available from <https://github.com/thkukuk/>.  The configure
  option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
  name service modules, to be built and installed.

* The DNS stub resolver no longer performs EDNS fallback.  If EDNS or DNSSEC
  support is enabled, the configured recursive resolver must support EDNS.
  (Responding to EDNS-enabled queries with responses which are not
  EDNS-enabled is fine, but FORMERR responses are not.)

* res_mkquery and res_nmkquery no longer support the IQUERY opcode.  DNS
  servers have not supported this opcode for a long time.

* The _res_opcodes variable has been removed from libresolv.  It had been
  exported by accident.

* <string.h> no longer includes inline versions of any string functions,
  as this kind of optimization is better done by the compiler.  The macros
  __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.

* The nonstandard header <xlocale.h> has been removed.  Most programs should
  use <locale.h> instead.  If you have a specific need for the definition of
  locale_t with no other declarations, please contact
  libc-alpha@sourceware.org and explain.

* The obsolete header <sys/ultrasound.h> has been removed.

* The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.

* The obsolete function cfree has been removed.  Applications should use
  free instead.

* The stack_t type no longer has the name struct sigaltstack.  This changes
  the C++ name mangling for interfaces involving this type.

* The ucontext_t type no longer has the name struct ucontext.  This changes
  the C++ name mangling for interfaces involving this type.

* On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
  the name struct fpregset.  On Nios II GNU/Linux, the mcontext_t type no
  longer has the name struct mcontext.  On SPARC GNU/Linux, the struct
  mc_fq, struct rwindow, struct fpq and struct fq types are no longer
  defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
  mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
  fpregset_t type no longer has the name struct fpu.  This changes the C++
  name mangling for interfaces involving those types.

* On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
  synced with the kernel:

    - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
      are not supported on this architecture and have been removed.

    - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
      PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
      PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.

  Programs that assume the GET/SETREGS ptrace requests are universally
  available will now fail to build, instead of malfunctioning at runtime.

Changes to build and runtime requirements:

* Linux kernel 3.2 or later is required at runtime, on all architectures
  supported by that kernel.  (This is a change from version 2.25 only for
  x86-32 and x86-64.)

* GNU Binutils 2.25 or later is now required to build the GNU C Library.

* On most architectures, GCC 4.9 or later is required to build the GNU C
  Library.  On powerpc64le, GCC 6.2 or later is required.

  Older GCC versions and non-GNU compilers are still supported when
  compiling programs that use the GNU C Library.  (We do not know exactly
  how old, and some GNU extensions to C may be _de facto_ required.  If you
  are interested in helping us make this statement less vague, please
  contact libc-alpha@sourceware.org.)

Security related changes:

* The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
  to avoid fragmentation-based spoofing attacks (CVE-2017-12132).

* LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
  mode to guard against local privilege escalation attacks (CVE-2017-1000366).

* Avoid printing a backtrace from the __stack_chk_fail function since it is
  called on a corrupt stack and a backtrace is unreliable on a corrupt stack
  (CVE-2010-3192).

* A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
  fixed (CVE-2017-12133).

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Akhilesh Kumar
Alan Modra
Alexey Neyman
Andreas Schwab
Arjun Shankar
Benjamin Cama
Carlos O'Donell
Chris Leonard
Christian Borntraeger
Christian Brauner
Christopher Chittleborough
Chung-Lin Tang
DJ Delorie
Dennis Wölfing
Dmitry Bilunov
Dmitry V. Levin
Egmont Koblinger
Eyolf Østrem
Florian Weimer
Gabriel F. T. Gomes
Gordana Cmiljanovic
H.J. Lu
Ihar Hrachyshka
Ivo Raisr
Jiong Wang
John David Anglin
Joseph Myers
Justus Winter
Kir Kolyshkin
Marko Myllynen
Massimeddu Cireddu
Matthew Krupcale
Mike FABIAN
Mike Frysinger
Mousa Moradi
Nathan Rossi
Paul Clarke
Paul E. Murphy
Paul Eggert
Peng Wu
Phil Blundell
Prakhar Bahuguna
Rabin Vincent
Rafal Luzynski
Rajalakshmi Srinivasaraghavan
Rical Jasan
Rogerio A. Cardoso
Samuel Thibault
Santhosh Thottingal
Siddhesh Poyarekar
Slava Barinov
Stefan Liebler
Steve Ellcey
Sunyeop Lee
Szabolcs Nagy
Thorsten Kukuk
Tulio Magno Quites Machado Filho
Uros Bizjak
Vladimir Mezentsev
Wainer dos Santos Moschetta
Wilco Dijkstra
Wladimir J. van der Laan
Yury Norov
Zack Weinberg

The GNU C Library
=================

The GNU C Library version 2.25 is now available.

The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.25 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.25
=====================

* The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
  24731-2:2010, is supported to enable declarations of functions from that
  TR.  Note that not all functions from that TR are supported by the GNU C
  Library.

* The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
  18661-1:2014, is supported to enable declarations of functions and macros
  from that TS.  Note that not all features from that TS are supported by
  the GNU C Library.

* The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
  18661-4:2015, is supported to enable declarations of functions and macros
  from that TS.  Note that most features from that TS are not supported by
  the GNU C Library.

* The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
  now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
  Since the GNU C Library defaults to a much newer revision of POSIX, this
  will only affect programs that specifically request an old conformance
  mode.  For instance, a program compiled with -std=c89 -D_REENTRANT will
  see a change in the visible declarations, but a program compiled with
  just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
  will not.

  Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
  defined by all multithreaded code, but glibc has not required this for
  many years.

* The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated.  This
  means that in a future release, the macros “major”, “minor”, and “makedev”
  will only be available from <sys/sysmacros.h>.

  These macros are not part of POSIX nor XSI, and their names frequently
  collide with user code; see for instance glibc bug 19239 and Red Hat bug
  130601.  <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
  presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
  problem.

* New <fenv.h> features from TS 18661-1:2014 are added to libm: the
  fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
  femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.

* Integer width macros from TS 18661-1:2014 are added to <limits.h>:
  CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
  UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
  <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
  INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
  UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
  INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
  UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
  UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
  UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
  UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
  WINT_WIDTH.

* New <math.h> features are added from TS 18661-1:2014:

  - Signaling NaN macros: SNANF, SNAN, SNANL.

  - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
    fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
    fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.

  - llogb functions: the llogb, llogbf and llogbl functions, and the
    FP_LLOGB0 and FP_LLOGBNAN macros.

  - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
    fminmagf, fminmagl.

  - Comparison macros: iseqsig.

  - Classification macros: iscanonical, issubnormal, iszero.

  - Total order functions: totalorder, totalorderf, totalorderl,
    totalordermag, totalordermagf, totalordermagl.

  - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.

  - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
    setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.

* The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
  are added to libc.  They convert a floating-point number into string.

* Most of glibc can now be built with the stack smashing protector enabled.
  It is recommended to build glibc with --enable-stack-protector=strong.
  Implemented by Nick Alcock (Oracle).

* The function explicit_bzero, from OpenBSD, has been added to libc.  It is
  intended to be used instead of memset() to erase sensitive data after use;
  the compiler will not optimize out calls to explicit_bzero even if they
  are "unnecessary" (in the sense that no _correct_ program can observe the
  effects of the memory clear).

* On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
  to float instead of double.  This does not affect the ABI of any libraries
  that are part of the GNU C Library, but may affect the ABI of other
  libraries that use this type in their interfaces.

* On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
  float_t and double_t types are now defined to long double instead of float
  and double.  These options are not the default, and this does not affect
  the ABI of any libraries that are part of the GNU C Library, but it may
  affect the ABI of other libraries that use this type in their interfaces,
  if they are compiled or used with those options.

* The getentropy and getrandom functions, and the <sys/random.h> header file
  have been added.

* The buffer size for byte-oriented stdio streams is now limited to 8192
  bytes by default.  Previously, on Linux, the default buffer size on most
  file systems was 4096 bytes (and thus remains unchanged), except on
  network file systems, where the buffer size was unpredictable and could be
  as large as several megabytes.

* The <sys/quota.h> header now includes the <linux/quota.h> header.  Support
  for the Linux quota interface which predates kernel version 2.4.22 has
  been removed.

* The malloc_get_state and malloc_set_state functions have been removed.
  Already-existing binaries that dynamically link to these functions will
  get a hidden implementation in which malloc_get_state is a stub.  As far
  as we know, these functions are used only by GNU Emacs and this change
  will not adversely affect already-built Emacs executables.  Any undumped
  Emacs executables, which normally exist only during an Emacs build, should
  be rebuilt by re-running “./configure; make” in the Emacs build tree.

* The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
  corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
  “no-ip6-dotint” had already been the default, and support for the
  “ip6-dotint” option was removed from the Internet in 2006.

* The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
  flag from <resolv.h> have been removed.  The option relied on a
  backwards-incompatible DNS extension which was never deployed on the
  Internet.

* The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
  RES_BLAST defined in the <resolv.h> header file have been deprecated.
  They were already unimplemented.

* The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
  _res.flags are deprecated.  The flag was standardized in RFC 2133, but
  removed again from the IETF name lookup interface specification in RFC
  2553.  Applications should use getaddrinfo instead.

* DNSSEC-related declarations and definitions have been removed from the
  <arpa/nameser.h> header file, and libresolv will no longer attempt to
  decode the data part of DNSSEC record types.  Previous versions of glibc
  only implemented minimal support for the previous version of DNSSEC, which
  is incompatible with the currently deployed version.

* The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
  ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
  <arpa/nameser.h> header file because the distinction between RR types and
  meta-RR types is not officially standardized, subject to revision, and
  thus not suitable for encoding in a macro.

* The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
  and rhook members of the res_state type in <resolv.h> have been removed.
  The glibc stub resolver did not support these hooks, but the header file
  did not reflect that.

* For multi-arch support it is recommended to use a GCC which has
  been built with support for GNU indirect functions.  This ensures
  that correct debugging information is generated for functions
  selected by IFUNC resolvers.  This support can either be enabled by
  configuring GCC with '--enable-gnu-indirect-function', or by
  enabling it by default by setting 'default_gnu_indirect_function'
  variable for a particular architecture in the GCC source file
  'gcc/config.gcc'.

* GDB pretty printers have been added for mutex and condition variable
  structures in POSIX Threads. When installed and loaded in gdb these pretty
  printers show various pthread variables in human-readable form when read
  using the 'print' or 'display' commands in gdb.

* Tunables feature added to allow tweaking of the runtime for an application
  program.  This feature can be enabled with the '--enable-tunables' configure
  flag.  The GNU C Library manual has details on usage and README.tunables has
  instructions on adding new tunables to the library.

* A new version of condition variables functions have been implemented in
  the NPTL implementation of POSIX Threads to provide stronger ordering
  guarantees.

* A new version of pthread_rwlock functions have been implemented to use a more
  scalable algorithm primarily through not using a critical section anymore to
  make state changes.

Security related changes:

* On ARM EABI (32-bit), generating a backtrace for execution contexts which
  have been created with makecontext could fail to terminate due to a
  missing .cantunwind annotation.  This has been observed to lead to a hang
  (denial of service) in some Go applications compiled with gccgo.  Reported
  by Andreas Schwab.  (CVE-2016-6323)

* The DNS stub resolver functions would crash due to a NULL pointer
  dereference when processing a query with a valid DNS question type which
  was used internally in the implementation.  The stub resolver now uses a
  question type which is outside the range of valid question type values.
  (CVE-2015-5180)

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Alan Modra
Alexandre Oliva
Andreas Schwab
Andrew Senkevich
Aurelien Jarno
Brent W. Baccala
Carlos O'Donell
Chris Metcalf
Chung-Lin Tang
DJ Delorie
David S. Miller
Denis Kaganovich
Dmitry V. Levin
Ernestas Kulik
Florian Weimer
Gabriel F T Gomes
Gabriel F. T. Gomes
H.J. Lu
Jakub Jelinek
James Clarke
James Greenhalgh
Jim Meyering
John David Anglin
Joseph Myers
Maciej W. Rozycki
Mark Wielaard
Martin Galvan
Martin Pitt
Mike Frysinger
Märt Põder
Nick Alcock
Paul E. Murphy
Paul Murphy
Rajalakshmi Srinivasaraghavan
Rasmus Villemoes
Rical Jasan
Richard Henderson
Roland McGrath
Samuel Thibault
Siddhesh Poyarekar
Stefan Liebler
Steve Ellcey
Svante Signell
Szabolcs Nagy
Tom Tromey
Torvald Riegel
Tulio Magno Quites Machado Filho
Wilco Dijkstra
Yury Norov
Zack Weinberg

The GNU C Library
=================

The GNU C Library version 2.24 is now available.

The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.24 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.24
=====================

* The minimum Linux kernel version that this version of the GNU C Library
  can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
  kernel version 2.6.32 or later suffices (on architectures that already
  required kernel versions more recent than 3.2, those requirements remain
  unchanged).  Linux 3.2 or later kernel headers are required on all
  architectures.

* The pap_AN locale has been deleted.  This has been deprecated for a long
  time.  It has been replaced by pap_AW & pap_CW, both of which have long
  been included in previous releases.

* The readdir_r and readdir64_r functions have been deprecated.  It is
  recommended to use readdir and readdir64 instead.

* The type “union wait” has been removed.  It was deprecated in the early
  1990s and never part of POSIX.  Application code should use the int type
  instead of “union wait”.

* A new NSS action is added to facilitate large distributed system
  administration.  The action, MERGE, allows remote user stores like LDAP
  to be merged into local user stores like /etc/groups in order to provide
  easy to use, updated, and managed sets of merged credentials.  The new
  action can be used by configuring it in /etc/nsswitch.conf:
  group: files [SUCCESS=merge] nis
  Implemented by Stephen Gallagher (Red Hat).

* The deprecated __malloc_initialize_hook variable has been removed from the
  API.

* The long unused localedef --old-style option has been removed.  It hasn't
  done anything in over 16 years.  Scripts using this option can safely
  drop it.

* nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
  libm.  They are defined by TS 18661 and IEEE754-2008.  The nextup functions
  return the next representable value in the direction of positive infinity
  and the nextdown functions return the next representable value in the
  direction of negative infinity.  These are currently enabled as GNU
  extensions.

Security related changes:

* An unnecessary stack copy in _nss_dns_getnetbyname_r was removed.  It
  could result in a stack overflow when getnetbyname was called with an
  overly long name.  (CVE-2016-3075)

* Previously, getaddrinfo copied large amounts of address data to the stack,
  even after the fix for CVE-2013-4458 has been applied, potentially
  resulting in a stack overflow.  getaddrinfo now uses a heap allocation
  instead.  Reported by Michael Petlan.  (CVE-2016-3706)

* The glob function suffered from a stack-based buffer overflow when it was
  called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
  Reported by Alexander Cherepanov.  (CVE-2016-1234)

* The Sun RPC UDP client could exhaust all available stack space when
  flooded with crafted ICMP and UDP messages.  Reported by Aldy Hernandez'
  alloca plugin for GCC.  (CVE-2016-4429)

* The IPv6 name server management code in libresolv could result in a memory
  leak for each thread which is created, performs a failing naming lookup,
  and exits.  Over time, this could result in a denial of service due to
  memory exhaustion.  Reported by Matthias Schiffer.  (CVE-2016-5417)

The following bugs are resolved with this release:

  [1170] localedata: ne_NP: update Nepali locale definition file
  [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
    of MS-DOS.
  [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
  [6796] math: fdim() does not set errno on overflow
  [10354] libc: posix_spawn should use vfork() in more cases than presently
  [11213] localedata: localedata: add copyright disclaimer to locale files
  [12143] localedata: chr_US: new Cherokee locale
  [12450] localedata: sgs_LT: new locale
  [12676] localedata: ln_CD: new locale
  [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
    CLDR data
  [13304] math: fma, fmaf, fmal produce wrong results
  [14259] build: --localedir arg to configure is ignored
  [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
  [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
  [14934] localedata: es_CL: wrong first weekday chilean locale
  [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
    romanisation
  [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
    and +/-
  [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
  [15368] nptl: raise() is not async-signal-safe
  [15479] math: ceil, floor, round and trunc raise inexact exception
  [15578] localedata: kk_KZ: various updates
  [16003] localedata: pap_AN: punt old locale
  [16137] localedata: iw_IL: punt old locale
  [16190] localedata: eo: new esperanto locale
  [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
  [16742] malloc: race condition: pthread_atfork() called before first
    malloc() results in unexpected locking behaviour/deadlocks
  [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
    all locales
  [16983] localedata: postal_fmt does not allow %l and %n modifiers
  [17565] localedata: pt_PT: wrong (work-)week start
  [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
  [17950] build: Build fails with -msse
  [18205] localedata: be_BY*: wrong first_weekday and first_workday
  [18433] libc: posix_spawn does not return correctly upon failure to
    execute
  [18453] localedata: charmaps/IBM875: incorrect codes
  [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
    -Wsystem-headers
  [18896] localedata: he_IL: improvements for currency
  [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
    Romanian locale data
  [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
    symbol
  [19056] libc: Deprecate readdir_r
  [19133] localedata: pt_*: days & months should be lowercase in Portuguese
    language
  [19198] localedata: nl_NL: small improvements for Dutch locales
  [19257] network: Per-thread memory leak in __res_vinit with IPv6
    nameservers (CVE-2016-5417)
  [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
    machine
  [19400] locale: Language missing in  "iso-639.def", trivial fix in
    description
  [19431] malloc: Deadlock between fflush, getdelim, and fork
  [19505] libc: Incorrect file descriptor validity checks in
    posix_spawn_file_actions_add{open,close,dup2}
  [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
    when using RTLD_NEXT
  [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
    `intl/{gettextP,loadinfo}.h'
  [19534] libc: execle, execlp may use malloc
  [19568] localedata: *_CH: Swiss locales have inconsistent start of week
  [19573] network: res_nclose and __res_maybe_init disagree about name
    server initialization, breaking Hesiod
  [19575] localedata: Status of GB18030 tables
  [19581] localedata: sr_* date_fmt string contains additional newline
  [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
    Excavator core
  [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
  [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
  [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
  [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
    double range
  [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
    part zero incorrect
  [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
    equality tests
  [19610] dynamic-link: ldconfig -X removes stale symbolic links
  [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
  [19633] locale: strfmon_l applies global locale to number formatting
  [19642] network: Memory leak in getnameinfo
  [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
  [19653] libc: Potential for NULL pointer dereference (CWE-476) in
    glibc-2.22
  [19654] math: [x86_64] Need testcase for BZ #19590 fix
  [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
    'tst-numeric.c'
  [19674] math: [ldbl-128ibm] powl incorrect overflow handling
  [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
    low part
  [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
    result
  [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
    unaligned stack
  [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
    pointers and lengths in error-case.
  [19727] locale: Converting from/to UTF-xx with iconv() does not always
    report errors on UTF-16 surrogates values.
  [19755] nscd: nscd assertion failure in gc
  [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
  [19759] libc: mempcpy shouldn't be inlined
  [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
  [19765] libc: s390 needs an optimized mempcpy
  [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
    NAME_MAX limit assumption (CVE-2016-1234)
  [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
  [19787] network: Missing and incorrect truncation checks in getnameinfo
  [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
    modes
  [19791] network: Assertion failure in res_query.c with un-connectable name
    server addresses
  [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
  [19822] math: libm.so install clobbers old version
  [19825] network: resolv: send_vc can return uninitialized data in second
    response to getaddrinfo
  [19830] network: nss_dns: should check RDATA length against buffer length
  [19831] network: nss_dns: getaddrinfo returns uninitialized data when
    confronted with A/AAAA records of invalid size
  [19837] nss: nss_db: No retries for some long lines with a larger buffer
  [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
  [19853] stdio: Printing IBM long double in decimal with high precision is
    sometimes incorrect
  [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
  [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
  [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
    record types
  [19865] network: Assertion failure or memory leak in
    _nss_dns_getcanonname_r
  [19868] network: nss_dns: netent code does not skip over non-PTR records
  [19879] network: nss_dns: Stack overflow in getnetbyname implementation
    (CVE-2016-3075)
  [19881] string: Improve x86-64 memset
  [19907] string: Incorrect memcpy tests
  [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
    resolving symbols
  [19925] libc: termios.h XCASE namespace
  [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
  [19929] libc: limits.h NL_NMAX namespace
  [19931] stdio: Memory leak in vfprintf
  [19957] libc: clone(CLONE_VM) access invalid parent memory
  [19963] localedata: en_IL: New locale
  [19989] stdio: stdio.h cuserid namespace
  [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
    gethosts
  [19996] locale: langinfo.h nl_langinfo_l namespace
  [20005] stdio: fflush on a file opened with fmemopen resets position to 0
  [20010] network: getaddrinfo: Stack overflow in hostent translation
    (CVE-2016-3706)
  [20012] stdio: libio: fmemopen append mode failure
  [20014] stdio: stdio.h namespace for pre-threads POSIX
  [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
  [20023] libc: fcntl.h timespec namespace
  [20024] math: [x86_64] vectorized sincos trashes the stack
  [20031] network: nss_hesiod: Heap overflow in get_txt_records
  [20041] time: sys/time.h timespec namespace
  [20043] libc: unistd.h missing cuserid for UNIX98 and before
  [20044] libc: unistd.h missing pthread_atfork for UNIX98
  [20051] libc: ttyslot in wrong header under wrong conditions
  [20054] libc: gethostname not declared for XPG4
  [20055] libc: termios.h missing tcgetsid for XPG4
  [20072] dynamic-link: x86 init_cpu_features is called twice in static
    executable
  [20073] libc: sys/stat.h fchmod namespace
  [20074] libc: stdlib.h rand_r namespace
  [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
  [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
    XPG3
  [20111] libc: struct sockaddr_storage cannot be aggregate-copied
  [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
    (CVE-2016-4429)
  [20115] string: Extra alignment in memset-vec-unaligned-erms.S
  [20119] libc: Wrong mask for processors level type from CPUID
  [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
    AS not supporting AVX512
  [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
    sNaN argument
  [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
  [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
    argument
  [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
  [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
  [20178] libc: posix_spawn{p} should not call exit
  [20191] stdio: libio: vtables hardening
  [20195] string: FMA4 detection requires CPUID execution with register
    eax=0x80000001
  [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
  [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
    subnormals
  [20212] math: acos (sNaN) returns sNaN
  [20213] math: asin (sNaN) returns sNaN
  [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
  [20218] math: [i386] asinhl (sNaN) returns sNaN
  [20219] math: [i386] atanhl (sNaN) returns sNaN
  [20222] stdio: fopencookie: Mangle function pointers
  [20224] math: [i386] cbrtl (sNaN) returns sNaN
  [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
  [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
    input
  [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
  [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
  [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
  [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
  [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
  [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
  [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
  [20237] nss: nss_db: get*ent segfaults without preceding set*ent
  [20240] math: modf (sNaN) returns sNaN
  [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
  [20250] math: frexp (sNaN) returns sNaN
  [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
  [20255] math: [i386] fdim, fdimf return with excess range and precision /
    double rounding
  [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
  [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
    subscript is below array bounds [-Werror=array-bounds]
  [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
  [20263] nptl: robust mutex deadlocks if other thread requests timedlock
    (Only arm/linux)
  [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
  [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
    fallbacks
  [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
    "invalid" exceptions
  [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
  [20316] localedata: id_ID: Februari instead of Pebruari
  [20327] string: POWER8 strcasecmp returns incorrect result
  [20347] math: Failure: Test: j0_downward (0xap+0)
  [20348] libc: FAIL: misc/tst-preadvwritev64
  [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
  [20350] libc: There is no test for p{read,write}64
  [20357] math: Incorrect cos result for 1.5174239687223976
  [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Andreas Schwab
Andrew Senkevich
Anton Blanchard
Arnas Udovičius
Aurelien Jarno
Carlos Eduardo Seo
Carlos O'Donell
Chris Metcalf
Chung-Lin Tang
Claude Paroz
Dimitris Pappas
Dmitry V. Levin
Dylan Alex Simon
Eduardo Trápani
Florian Weimer
Gabriel F. T. Gomes
Gunnar Hjalmarsson
Gustavo Romero
Guy Rutenberg
H.J. Lu
Hongjiu Zhang
Jiyoung Yun
John David Anglin
Joseph Myers
Khem Raj
Maciej W. Rozycki
Mark Wielaard
Marko Myllynen
Martin Galvan
Matthew Fortune
Matthias Wallnoefer
Mike FABIAN
Mike Frysinger
Neskie Manuel
Nick Alcock
Paras pradhan
Paul E. Murphy
Paul Pluzhnikov
Rajalakshmi Srinivasaraghavan
Rical Jasan
Richard Henderson
Robin van der Vliet
Roland McGrath
Samuel Thibault
Siddhesh Poyarekar
Simion Onea
Stefan Liebler
Stephen Gallagher
Szabolcs Nagy
Timur Birsh
Torvald Riegel
Tulio Magno Quites Machado Filho
Wilco Dijkstra
Will Newton
Yvan Roux
Zack Weinberg

The GNU C Library
=================

The GNU C Library version 2.23 is now available.

The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.23 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.23
=====================

* Unicode 8.0.0 Support: Character encoding, character type info, and
  transliteration tables are all updated to Unicode 8.0.0, using new
  and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
  These updates cause user visible changes, such as the fixes for bugs
  89, 16061, and 18568.

* sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
  kernel-internal CPU set size.  This means that requests that change the
  CPU affinity which failed before (for example, an all-ones CPU mask) will
  now succeed.  Applications that need to determine the effective CPU
  affinities need to call sched_getaffinity or pthread_getaffinity_np after
  setting it because the kernel can adjust it (and the previous size check
  would not detect this in the majority of cases).

* The fts.h header can now be used with -D_FILE_OFFSET_BITS=64.  With LFS
  the following new symbols are used: fts64_children, fts64_close,
  fts64_open, fts64_read and fts64_set.

* getaddrinfo now detects certain invalid responses on an internal netlink
  socket.  If such responses are received, an affected process will
  terminate with an error message of "Unexpected error <number> on netlink
  descriptor <number>" or "Unexpected netlink response of size <number> on
  descriptor <number>".  The most likely cause for these errors is a
  multi-threaded application which erroneously closes and reuses the netlink
  file descriptor while it is used by getaddrinfo.

* A defect in the malloc implementation, present since glibc 2.15 (2012) or
  glibc 2.10 via --enable-experimental-malloc (2009), could result in the
  unnecessary serialization of memory allocation requests across threads.
  The defect is now corrected.  Users should see a substantial increase in
  the concurent throughput of allocation requests for applications which
  trigger this bug.  Affected applications typically create create and
  destroy threads frequently.  (Bug 19048 was reported and analyzed by
  Ericsson.)

* There is now a --disable-timezone-tools configure option for disabling the
  building and installing of the timezone related utilities (zic, zdump, and
  tzselect).  This is useful for people who build the timezone data and code
  independent of the GNU C Library.

* The obsolete header <regexp.h> has been removed.  Programs that require
  this header must be updated to use <regex.h> instead.

* The obsolete functions bdflush, create_module, get_kernel_syms,
  query_module and uselib are no longer available to newly linked binaries;
  the header <sys/kdaemon.h> has been removed.  These functions and header
  were specific to systems using the Linux kernel and could not usefully be
  used with the GNU C Library on systems with version 2.6 or later of the
  Linux kernel.

* Optimized string, wcsmbs and memory functions for IBM z13.
  Implemented by Stefan Liebler.

* Newly linked programs that define a variable called signgam will no longer
  have it set by the lgamma, lgammaf and lgammal functions.  Programs that
  require signgam to be set by those functions must ensure that they use the
  variable provided by the GNU C Library and declared in <math.h>, without
  defining their own copy.

* The minimum GCC version that can be used to build this version of the GNU
  C Library is GCC 4.7.  Older GCC versions, and non-GNU compilers, can
  still be used to compile programs using the GNU C Library.

Security related changes:

* An out-of-bounds value in a broken-out struct tm argument to strftime no
  longer causes a crash.  Reported by Adam Nielsen.  (CVE-2015-8776)

* The LD_POINTER_GUARD environment variable can no longer be used to disable
  the pointer guard feature.  It is always enabled.  Previously,
  LD_POINTER_GUARD could be used to disable security hardening in binaries
  running in privileged AT_SECURE mode.  Reported by Hector Marco-Gisbert.
  (CVE-2015-8777)

* An integer overflow in hcreate and hcreate_r could lead to an
  out-of-bounds memory access.  Reported by Szabolcs Nagy.  (CVE-2015-8778)

* The catopen function no longer has unbounded stack usage.  Reported by
  Max.  (CVE-2015-8779)

* The nan, nanf and nanl functions no longer have unbounded stack usage
  depending on the length of the string passed as an argument to the
  functions.  Reported by Joseph Myers.  (CVE-2014-9761)

* A stack-based buffer overflow was found in libresolv when invoked from
  libnss_dns, allowing specially crafted DNS responses to seize control
  of execution flow in the DNS client.  The buffer overflow occurs in
  the functions send_dg (send datagram) and send_vc (send TCP) for the
  NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
  family.  The use of AF_UNSPEC triggers the low-level resolver code to
  send out two parallel queries for A and AAAA.  A mismanagement of the
  buffers used for those queries could result in the response of a query
  writing beyond the alloca allocated buffer created by
  _nss_dns_gethostbyname4_r.  Buffer management is simplified to remove
  the overflow.  Thanks to the Google Security Team and Red Hat for
  reporting the security impact of this issue, and Robert Holiday of
  Ciena for reporting the related bug 18665. (CVE-2015-7547)

The following bugs are resolved with this release:

  [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
  [887] math: Math library function "logb" and "nextafter" inconsistent
  [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
  [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
  [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
  [2898] libc: [improve]  warning: the use  of `mktemp' is dangerous, better
    use `mkstemp'
  [4404] localedata: German translation of "Alarm clock" is misleading
  [6799] math: nextafter() and nexttoward() doen't set errno on
    overflow/underflow errors
  [6803] math: scalb(), scalbln(), scalbn() do not set errno on
    overflow/underflow
  [10432] nis: _nss_nis_setnetgrent assertion failure
  [11460] libc: fts has no LFS support
  [12926] network: getaddrinfo()/make_request() may spin forever
  [13065] nptl: Race condition in pthread barriers
  [13690] nptl: pthread_mutex_unlock potentially cause invalid access
  [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
    are not contiguous
  [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
  [14912] libc: Rename non-installed bits/*.h headers
  [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
  [15367] math: Let gcc use __builtin_isinf
  [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
  [15421] math: lgamma wrongly sets signgam for ISO C
  [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
    FE_INVALID with argument out of range
  [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
    all exceptions
  [15786] dynamic-link: ifunc resolver functions can smash function
    arguments
  [15918] math: Unnecessary check for equality in hypotf()
  [16061] localedata: Review / update transliteration data
  [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
    should include
  [16141] time: strptime %z offset restriction
  [16171] math: drem should be alias of remainder
  [16296] math: fegetround is pure?
  [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
  [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
    GNU/Linux
  [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
  [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
    arguments
  [16422] math: [powerpc] math-float, math-double failing llrint tests with
    "Exception "Inexact" set" on ppc32
  [16495] localedata: nl_NL: date_fmt: shuffle year/month around
  [16517] math: Missing underflow exception from tanf/tan/tanl
  [16519] math: Missing underflow exception from sinhf
  [16520] math: Missing underflow exception from tanhf
  [16521] math: Missing underflow exception from exp2
  [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
    rounding results
  [16734] stdio: fopen calls mmap to allocate its buffer
  [16961] math: nan function incorrect handling of bad sequences
  [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
  [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
  [16985] locale: localedef: confusing error message when opening output
    fails
  [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
  [17197] locale: Redundant shift character in iconv conversion output at
    block boundary
  [17243] libc: trunk/posix/execl.c:53: va_args problem ?
  [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
  [17250] dynamic-link: static linking breaks nss loading
    (getaddrinfo/getpwnam/etc...)
  [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
    4.7?
  [17441] math: isnan() should use __builtin_isnan() in GCC
  [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
    (related to lock elision)
  [17787] manual: Exponent on page 324 of the PDF ends prematurely
  [17886] time: strptime should be able to parse "Z" as a timezone with %z
  [17887] time: strptime should be able to parse "+01:00" style timezones
  [17905] libc: catopen() Multiple unbounded stack allocations
    (CVE-2015-8779)
  [18084] libc: backtrace (..., 0) dumps core on x86
  [18086] libc: nice() sets errno to 0 on success
  [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
    is too large (CVE-2015-8778)
  [18251] dynamic-link: SONAME missing when audit modules provides path
  [18265] libc: add attributes for wchar string and memory functions
  [18370] math: csqrt missing underflows
  [18421] libc: [hppa] read-only segment has dynamic relocations
  [18472] libc: Obsolete syscall wrappers should be compat symbols
  [18480] libc: hppa glibc miscompilation in sched_setaffinity()
  [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
  [18525] localedata: Remove locale timezone information
  [18560] libc: [powerpc] spurious bits/ipc.h definitions
  [18568] localedata: Update locale data to Unicode 8.0
  [18589] locale: sort-test.sh fails at random
  [18595] math: ctan, ctanh missing underflows
  [18604] libc: assert macro-expands its argument
  [18610] math: S390: fetestexcept() reports any exception if DXC-code
    contains a vector instruction exception.
  [18611] math: j1, jn missing errno setting on underflow
  [18618] localedata: sync Chechen locale definitions with other *_RU
    locales
  [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
  [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
  [18665] network: In send_dg, the recvfrom function is NOT always using the
    buffer size of a newly created buffer (CVE-2015-7547)
  [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
    missing break ?
  [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
    32bit processes
  [18681] libc: regexp.h is obsolete and buggy, and should be desupported
  [18699] math: tilegx cproj() for various complex infinities does not yield
    infinity
  [18724] libc: Harden put*ent functions against data injection
  [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
  [18755] build: build errors with -DNDEBUG
  [18757] stdio: fmemopen fails to set errno on failure
  [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
    be forced unloaded
  [18781] libc: openat64 lacks O_LARGEFILE
  [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
    error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
  [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
  [18790] math: [ldbl-128ibm] tanhl inaccurate
  [18795] libc: stpncpy fortification misses buffer lengths that are
    statically too large
  [18796] build: build fails for --disable-mathvec
  [18803] math: hypot missing underflows
  [18820] stdio: fmemopen may leak memory on failure
  [18823] math: csqrt spurious underflows
  [18824] math: fma spurious underflows
  [18825] math: pow missing underflows
  [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
  [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
  [18870] build: sem_open.c fails to compile with missing symbol
    FUTEX_SHARED
  [18872] stdio: Fix memory leak in printf_positional
  [18873] libc: posix_fallocate overflow check ineffective
  [18875] math: Excess precision leads incorrect libm
  [18877] libc: arm: mmap offset regression
  [18887] libc: memory corruption when using getmntent on blank lines
  [18918] localedata: hu_HU: change time to HH:MM:SS format
  [18921] libc: Regression: extraneous stat() and fstat() performed by
    opendir()
  [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
    binaries (CVE-2015-8777)
  [18951] math: tgamma missing underflows
  [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
    signgam
  [18953] localedata: lt_LT: change currency symbol to the euro
  [18956] math: powf inaccuracy
  [18961] math: [i386] exp missing underflows
  [18966] math: [i386] exp10 missing underflows
  [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
  [18969] build: multiple string test failures due to missing locale
    dependencies
  [18970] libc: Reference of pthread_setcancelstate in libc.a
  [18977] math: float / long double Bessel functions not in XSI POSIX
  [18980] math: i386 libm functions return with excess range and precision
  [18981] math: i386 scalb*, ldexp return with excess range and precision
  [18982] stdio: va_list and vprintf
  [18985] time: Passing out of range data to strftime() causes a segfault
    (CVE-2015-8776)
  [19003] math: [x86_64] fma4 version of pow inappropriate contraction
  [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
  [19012] locale: iconv_open leaks memory on error path
  [19016] math: clog, clog10 inaccuracy
  [19018] nptl: Mangle function pointers in tls_dtor_list
  [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
  [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
  [19048] malloc: malloc: arena free list can become cyclic, increasing
    contention
  [19049] math: [powerpc] erfc incorrect zero sign
  [19050] math: [powerpc] log* incorrect zero sign
  [19058] math: [x86_64] Link fail with -fopenmp and -flto
  [19059] math: nexttoward overflow incorrect in non-default rounding modes
  [19071] math: ldbl-96 lroundl incorrect just below powers of 2
  [19074] network: Data race in _res_hconf_reorder_addrs
  [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
  [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
  [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
    rounding modes
  [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
    ILP32
  [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
  [19086] manual: posix_fallocate64 documented argument order is wrong.
  [19088] math: lround, llround missing exceptions close to overflow
    threshold
  [19094] math: lrint, llrint missing exceptions close to overflow threshold
  [19095] math: dbl-64 lrint incorrect for 64-bit long
  [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
  [19124] dynamic-link: ld.so failed to build with older assmebler
  [19125] math: [powerpc32] llroundf, llround incorrect exceptions
  [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
  [19134] math: [powerpc32] lround, lroundf spurious exceptions
  [19137] libc: i386/epoll_pwait.S doesn't support cancellation
  [19143] nptl: Remove CPU set size checking from sched_setaffinity,
    pthread_setaffinity_np
  [19156] math: [ldbl-128] j0l spurious underflows
  [19164] nptl: tst-getcpu fails with many possible CPUs
  [19168] math: math/test-ildoubl and math/test-ldouble failure
  [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
  [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
    prelink
  [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
    (FE_NOMASK_ENV) do not clear SSE exceptions
  [19182] malloc: malloc deadlock between ptmalloc_lock_all and
    _int_new_arena/reused_arena
  [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
  [19201] math: dbl-64 remainder incorrect sign of zero result
  [19205] math: bits/math-finite.h conditions do not match math.h and
    bits/mathcalls.h
  [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
  [19211] math: lgamma functions do not set signgam for -ffinite-math-only
    for C99-based standards
  [19212] libc: features.h not -Wundef clean
  [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
    math-only
  [19214] libc: Family and model identification for AMD CPU's are incorrect.
  [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
  [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
    disabled
  [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
    "inexact" exceptions
  [19238] math: [powerpc] round, roundf spurious "inexact" for integer
    arguments
  [19242] libc: strtol incorrect in Turkish locales
  [19243] malloc: reused_arena can pick an arena on the free list, leading
    to an assertion failure and reference count corruption
  [19253] time: tzset() ineffective when temporary TZ did not include DST
    rules
  [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
  [19270] math: [hppa] Shared libm missing __isnanl
  [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
    MAP_HUGETLB and MAP_STACK defines
  [19313] nptl: Wrong __cpu_mask for x32
  [19347] libc: grantpt: try to force a specific gid even without pt_chown
  [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
  [19350] math: [ldbl-128ibm] sinhl spurious overflows
  [19351] math: [ldbl-128ibm] logl inaccurate near 1
  [19363] time: x32: times() return value wrongly truncates/sign extends
    from 32bit
  [19367] dynamic-link: Improve branch prediction on Silvermont
  [19369] network: Default domain name not reset by res_ninit when "search"
    / "domain" entry is removed from resolv.conf
  [19375] math: powerpc: incorrect results for POWER7 logb with negative
    subnormals
  [19385] localedata: bg_BG: time separator should be colon, not comma
  [19408] libc: linux personality syscall wrapper may erroneously return an
    error on 32-bit architectures
  [19415] libc: dladdr returns wrong names on hppa
  [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
    IBM905, IBM907, and IBM909
  [19439] math: Unix98 isinf and isnan functions conflict with C++11
  [19443] build: build failures with -DDEBUG
  [19451] build: Make check fails on test-double-vlen2
  [19462] libc: Glibc failed to build with -Os
  [19465] math: Wrong code with -Os
  [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
    -Os
  [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
    CPU's.
  [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
  [19486] math: S390: Math tests fail with "Exception Inexact set".
  [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
  [19550] libc: [mips] mmap negative offset handling inconsistent with other
    architectures
  [19590] math: Fail to build shared objects that use libmvec.so functions.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Alan Modra
Amit Pawar
Andreas Schwab
Andrew Bennett
Andrew Senkevich
Andrew Stubbs
Anton Blanchard
Arjun Shankar
Arslanbek Astemirov
Aurelien Jarno
Brett Neumeier
Carlos Eduardo Seo
Carlos O'Donell
Chris Metcalf
Chung-Lin Tang
Damyan Ivanov
Daniel Marjamäki
David Kastrup
David Lamparter
David S. Miller
Dmitry V. Levin
Egmont Koblinger
Evert
Flavio Cruz
Florian Weimer
Gabriel F. T. Gomes
Geoffrey Thomas
Gleb Fotengauer-Malinovskiy
Gunnar Hjalmarsson
H.J. Lu
Helge Deller
James Perkins
John David Anglin
Joseph Myers
Justus Winter
Khem Raj
Ludovic Courtès
Maciej W. Rozycki
Manolis Ragkousis
Marcin Kościelnicki
Mark Wielaard
Marko Myllynen
Martin Sebor
Maxim Ostapenko
Mike FABIAN
Mike Frysinger
Namhyung Kim
Ondrej Bilka
Ondřej Bílka
Paul E. Murphy
Paul Eggert
Paul Murphy
Paul Pluzhnikov
Petar Jovanovic
Phil Blundell
Rajalakshmi Srinivasaraghavan
Rasmus Villemoes
Richard Henderson
Rob Wu
Roland McGrath
Samuel Thibault
Siddhesh Poyarekar
Stan Shebs
Stefan Liebler
Steve Ellcey
Szabolcs Nagy
Thomas Schwinge
Torvald Riegel
Tulio Magno Quites Machado Filho
Vincent Bernat
Wilco Dijkstra
Zack Weinberg

The GNU C Library
=================

The GNU C Library version 2.22 is now available.

The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.22 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.22
=====================

* The following bugs are resolved with this release:

  438, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152, 14094,
  14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159, 16339,
  16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538, 16559, 16560,
  16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322, 17403,
  17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628,
  17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833, 17836, 17841,
  17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969,
  17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020,
  18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046,
  18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18116,
  18125, 18128, 18134, 18138, 18185, 18196, 18197, 18206, 18210, 18211,
  18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287, 18319,
  18324, 18333, 18346, 18371, 18383, 18397, 18400, 18409, 18410, 18412,
  18418, 18422, 18434, 18444, 18457, 18468, 18469, 18470, 18479, 18483,
  18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, 18519,
  18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536,
  18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18557,
  18558, 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612,
  18613, 18619, 18633, 18641, 18643, 18648, 18657, 18676, 18694, 18696.

* Cache information can be queried via sysconf() function on s390 e.g. with
  _SC_LEVEL1_ICACHE_SIZE as argument.

* A buffer overflow in gethostbyname_r and related functions performing DNS
  requests has been fixed.  If the NSS functions were called with a
  misaligned buffer, the buffer length change due to pointer alignment was
  not taken into account.  This could result in application crashes or,
  potentially arbitrary code execution, using crafted, but syntactically
  valid DNS responses.  (CVE-2015-1781)

* The time zone file parser has been made more robust against crafted time
  zone files, avoiding heap buffer overflows related to the processing of
  the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
  large time zone data files.  Overly long time zone specifiers in the TZ
  variable no longer result in stack overflows and crashes.

* A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
  for LD and GD on x86 and x86-64, has been implemented.  You will need
  binutils-2.24 or later to enable this optimization.

* Character encoding and ctype tables were updated to Unicode 7.0.0, using
  new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
  Hat).  These updates cause user visible changes, such as the fix for bug
  17998.

* CVE-2014-8121 The NSS backends shared internal state between the getXXent
  and getXXbyYY NSS calls for the same database, causing a denial-of-service
  condition in some applications.

* Added vector math library named libmvec with the following vectorized x86_64
  implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
  pow, powf.
  The library can be disabled with --disable-mathvec. Use of the functions is
  enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
  Shared library libmvec.so is linked in as needed when using -lm (no need to
  specify -lmvec explicitly for not static builds).
  Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.

* A new fmemopen implementation has been added with the goal of POSIX
  compliance. The new implementation fixes the following long-standing
  issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
  old implementation is still present for use be by existing binaries.

* The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
  releases.  It has been fixed to match 2.19 and older, but binaries built
  against 2.20 and 2.21 might need to be recompiled.  See BZ#18694.

* Port to Native Client running on ARMv7-A (--host=arm-nacl).
  Contributed by Roland McGrath (Google).

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Alan Modra
Alexandre Oliva
Andreas Schwab
Andrew Senkevich
Andriy Rysin
Arjun Shankar
Aurelien Jarno
Benno Schulenberg
Brad Hubbard
Carlos O'Donell
Chris Metcalf
Christian Schmidt
Chung-Lin Tang
Cong Wang
Cyril Hrubis
Daniel Marjamäki
David S. Miller
Dmitry V. Levin
Eric Rannaud
Evangelos Foutras
Feng Gao
Florian Weimer
Gleb Fotengauer-Malinovskiy
H.J. Lu
Igor Zamyatin
J William Piggott
James Cowgill
James Lemke
John David Anglin
Joseph Myers
Kevin Easton
Khem Raj
Leonhard Holz
Mark Wielaard
Marko Myllynen
Martin Galvan
Martin Sebor
Matthew Fortune
Mel Gorman
Mike Frysinger
Miroslav Lichvar
Nathan Lynch
Ondřej Bílka
Paul Eggert
Paul Pluzhnikov
Pavel Kopyl
Pravin Satpute
Rajalakshmi Srinivasaraghavan
Rical Jasan
Richard Henderson
Roland McGrath
Rüdiger Sonderfeld
Samuel Thibault
Siddhesh Poyarekar
Stefan Liebler
Steve Ellcey
Szabolcs Nagy
Torvald Riegel
Tulio Magno Quites Machado Filho
Vincent Bernat
Wilco Dijkstra
Yaakov Selkowitz
Zack Weinberg

The GNU C Library
=================

The GNU C Library version 2.21 is now available.

The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.21 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.21
=====================

* The following bugs are resolved with this release:

  6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
  15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
  16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
  17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
  17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
  17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
  17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
  17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
  17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
  17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
  17892.

* CVE-2015-1472 Under certain conditions wscanf can allocate too little
  memory for the to-be-scanned arguments and overflow the allocated
  buffer.  The implementation now correctly computes the required buffer
  size when using malloc.

* A new semaphore algorithm has been implemented in generic C code for all
  machines. Previous custom assembly implementations of semaphore were
  difficult to reason about or ensure that they were safe. The new version
  of semaphore supports machines with 64-bit or 32-bit atomic operations.
  The new semaphore algorithm is used by sem_init, sem_open, sem_post,
  sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.

* Port to Altera Nios II has been contributed by Mentor Graphics.

* Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
  implementations for powerpc64/powerpc64le.
  Implemented by Adhemerval Zanella (IBM).

* Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
  and powerpc64le.  This may improve lock scaling of existing programs on
  HTM capable systems.  The lock elision code is only enabled with
  --enable-lock-elision=yes.  Also, the TSX lock elision implementation for
  powerpc will issue a transaction abort on every syscall to avoid side
  effects being visible outside transactions.

* Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
  AArch64.  Contributed by ARM Ltd.

* i386 memcpy functions optimized with SSE2 unaligned load/store.

* CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
  under certain input conditions resulting in the execution of a shell for
  command substitution when the applicaiton did not request it. The
  implementation now checks WRDE_NOCMD immediately before executing the
  shell and returns the error WRDE_CMDSUB as expected.

* CVE-2012-3406 printf-style functions could run into a stack overflow when
  processing format strings with a large number of format specifiers.

* CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
  infinite loop if the DNS response contained a PTR record of an unexpected
  format.

* The minimum GCC version that can be used to build this version of the GNU
  C Library is GCC 4.6.  Older GCC versions, and non-GNU compilers, can
  still be used to compile programs using the GNU C Library.

* The GNU C Library is now built with -Werror by default.  This can be
  disabled by configuring with --disable-werror.

* New locales: tu_IN, bh_IN, raj_IN, ce_RU.

* The obsolete sigvec function has been removed.  This was the original
  4.2BSD interface that inspired the POSIX.1 sigaction interface, which
  programs have been using instead for about 25 years.  Of course, ABI
  compatibility for old binaries using sigvec remains intact.

* Merged gettext 0.19.3 into the intl subdirectory.  This fixes building
  with newer versions of bison.

* Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
  The original MIPS o32 hard-float ABI requires an FPU where double-precision
  registers overlay two consecutive single-precision registers.  MIPS32R2
  introduced a new FPU mode (FR=1) where double-precision registers extend the
  corresponding single-precision registers which is incompatible with the
  o32 hard-float ABI.  The MIPS SIMD ASE and the MIPSR6 architecture both
  require the use of FR=1 making a transition necessary.  New o32 ABI
  extensions enable users to migrate over time from the original o32 ABI
  through to the updated o32 FP64 ABI.  To achieve this the dynamic linker now
  tracks the ABI of any loaded object and verifies that new objects are
  compatible.  Mode transitions will also be requested as required and
  unsupportable objects will be rejected.  The ABI checks include both soft and
  hard float ABIs for o32, n32 and n64.

  GCC 5 with GNU binutils 2.25 onwards:
  It is strongly recommended that all o32 system libraries are built using the
  new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
  with the original and all new o32 ABI extensions.  Configure a MIPS GCC
  compiler using --with-fp-32=xx to set this by default.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Alan Hayward
Alexandre Oliva
Allan McRae
Anders Kaseorg
Andreas Krebbel
Andreas Schwab
Andrew Pinski
Andrew Senkevich
Anton Blanchard
Arjun Shankar
Aurelien Jarno
Bram
Brooks Moses
Carlos O'Donell
Chris Metcalf
Chung-Lin Tang
David Holsgrove
David S. Miller
Eric Biggers
Florian Weimer
Gratian Crisan
H.J. Lu
J. Brown
James Lemke
Jeff Law
Jose E. Marchesi
Joseph Myers
Kaz Kojima
Kostya Serebryany
Leonhard Holz
Ma Shimiao
Maciej W. Rozycki
Marcus Shawcroft
Marek Polacek
Martin Sebor
Matthew Fortune
Mike Frysinger
Ondřej Bílka
Paul Eggert
Paul Pluzhnikov
Petar Jovanovic
Pravin Satpute
Rajalakshmi Srinivasaraghavan
Rasmus Villemoes
Renlin Li
Richard Earnshaw
Richard Henderson
Roland McGrath
Ryan Cumming
Samuel Thibault
Siddhesh Poyarekar
Stefan Liebler
Steve Ellcey
Tatiana Udalova
Tim Lammens
Tom de Vries
Torvald Riegel
Vladimir A. Nazarenko
Wilco Dijkstra
Will Newton

The GNU C Library
=================

The GNU C Library version 2.20 is now available.

The GNU C Library is used as *the* C library in the GNU systems
and is widely used on systems with the Linux kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.20 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.20
====================

* The following bugs are resolved with this release:

  6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
  15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
  16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
  16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
  16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
  16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
  16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
  16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
  16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
  16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
  16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
  16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
  17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
  17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
  17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.

* Reverted change of ABI data structures for s390 and s390x:
  On s390 and s390x the size of struct ucontext and jmp_buf was increased in
  2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
  of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
  are preserved pointing straight to the same implementation as the old ones.
  Given that, new callers will simply provide a too-big buffer to these
  functions. Any applications/libraries out there that embed jmp_buf or
  ucontext_t in an ABI-relevant data structure that have already been rebuilt
  against 2.19 headers will have to rebuilt again. This is necessary in any
  case to revert the breakage in their ABI caused by the glibc change.

* Support for file description locks is added to systems running the
  Linux kernel. The standard file locking interfaces are extended to
  operate on file descriptions, not file descriptors, via the use of
  F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
  are associated with an open file instead of a process.

* Optimized strchr implementation for AArch64.  Contributed by ARM Ltd.

* The minimum Linux kernel version that this version of the GNU C Library
  can be used with is 2.6.32.

* Running the testsuite no longer terminates as soon as a test fails.
  Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
  with PASS or FAIL lines for individual tests.  A summary of the results is
  printed, including a list of failing lists, and "make check" exits with
  error status if there were any unexpected failures.  "make check
  stop-on-test-failure=y" may be used to keep the old behavior.

* The am33 port, which had not worked for several years, has been removed
  from ports.

* The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
  supported; they now act the same as _DEFAULT_SOURCE (but generate a
  warning).  Except for cases where _BSD_SOURCE enabled BSD interfaces that
  conflicted with POSIX (support for which was removed in 2.19), the
  interfaces those macros enabled remain available when compiling with
  _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
  test macros defined.

* Optimized strcmp implementation for ARMv7.  Contributed by ARM Ltd.

* Added support for TX lock elision of pthread mutexes on s390 and s390x.
  This may improve lock scaling of existing programs on TX capable systems.
  The lock elision code is only built with --enable-lock-elision=yes and
  then requires a GCC version supporting the TX builtins.  With lock elision
  default mutexes are elided via __builtin_tbegin, if the cpu supports
  transactions. By default lock elision is not enabled and the elision code
  is not built.

* CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
  copy the path argument.  This allowed programs to cause posix_spawn to
  deference a dangling pointer, or use an unexpected pathname argument if
  the string was modified after the posix_spawn_file_actions_addopen
  invocation.

* All supported architectures now use the main glibc sysdeps directory
  instead of some being in a separate "ports" directory (which was
  distributed separately before glibc 2.17).

* The NPTL implementation of POSIX pthreads is no longer an "add-on".
  On configurations that support it (all Linux configurations), it's now
  used regardless of the --enable-add-ons switch to configure.  It is no
  longer possible to build such configurations without pthreads support.

* Locale names, including those obtained from environment variables (LANG
  and the LC_* variables), are more tightly checked for proper syntax.
  setlocale will now fail (with EINVAL) for locale names that are overly
  long, contain slashes without starting with a slash, or contain ".." path
  components. (CVE-2014-0475)  Previously, some valid locale names were
  silently replaced with the "C" locale when running in AT_SECURE mode
  (e.g., in a SUID program).  This is no longer necessary because of the
  additional checks.

* On x86-64, the dynamic linker's lazy-binding support is now compatible
  with application code using Intel MPX instructions.  (With all previous
  versions, the MPX register state could be clobbered when making calls
  into or out of a shared library.)  Note that while the new dynamic
  linker is compatible with all known x86 hardware whether or not it
  supports Intel MPX, some x86 instruction-set emulators might fail to
  handle the new instruction encodings.  This is known to affect Valgrind
  versions up through 3.9 (but will be fixed in the forthcoming 3.10
  release), and might affect other tools that do instruction emulation.

* Support for loadable gconv transliteration modules has been removed.
  The support for transliteration modules has been non-functional for
  over a decade, and the removal is prompted by security defects.  The
  normal gconv conversion modules are still supported.  Transliteration
  with //TRANSLIT is still possible, and the //IGNORE specifier
  continues to be  supported. (CVE-2014-5119)

* Decoding a crafted input sequence in the character sets IBM933, IBM935,
  IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
  resulting a denial-of-service security vulnerability in applications which
  use functions related to iconv. (CVE-2014-6040)

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adam Conrad
Adhemerval Zanella
Alan Modra
Allan McRae
Andi Kleen
Andreas Krebbel
Andreas Schwab
Arjun Shankar
Aurelien Jarno
Bernard Ogden
Carlos O'Donell
Chris Metcalf
David Holsgrove
David S. Miller
David Svoboda
Dominik Vogt
Dylan Alex Simon
Eric Wong
Florian Weimer
Guo Yixuan
H.J. Lu
Ian Bolton
Igor Zamyatin
Jeff Layton
Jim Meyering
Joey Ye
Jose E. Marchesi
Joseph Anthony Pasquale Holsten
Joseph Myers
Julian Brown
Khem Raj
Konstantin Serebryany
Kyle McMartin
Ling Ma
Ludovic Courtès
Maciej W. Rozycki
Marcus Shawcroft
Mark Wielaard
Marko Myllynen
Meador Inge
Mike Frysinger
Ondřej Bílka
Paul Eggert
Paul Pluzhnikov
Peter TB Brett
Rajalakshmi Srinivasaraghavan
Rasmus Villemoes
Richard Earnshaw
Richard Henderson
Roland McGrath
Sami Kerola
Samuel Thibault
Sean Anderson
Serge Hallyn
Siddhesh Poyarekar
Sihai Yao
Stefan Liebler
Steve Ellcey
Tomas Dohnalek
Torvald Riegel
Venkataramanan Kumar
Vidya Ranganathan
Wilco
Wilco Dijkstra
Will Newton
Yang Yingliang
Yufeng Zhang
Yury Gribov
Yvan Roux

The GNU C Library
=================

The GNU C Library version 2.19 is now available.

The GNU C Library is used as *the* C library in the GNU systems
and most systems with the Linux kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.19 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.19
=====================

* The following bugs are resolved with this release:

  156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
  7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
  12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
  14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
  15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
  15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
  15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
  15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
  15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
  15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
  15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
  15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
  16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
  16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
  16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
  16356, 16365, 16366, 16369, 16372, 16375, 16379, 16384, 16385, 16386,
  16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430, 16431,
  16453, 16474, 16506, 16510, 16529

* Slovenian translations for glibc messages have been contributed by the
  Translation Project's Slovenian team of translators.

* The public headers no longer use __unused nor __block.  This change is to
  support compiling programs that are derived from BSD sources and use
  __unused internally, and to support compiling with Clang's -fblock
  extension which uses __block.

* CVE-2012-4412 The strcoll implementation caches indices and rules for
  large collation sequences to optimize multiple passes.  This cache
  computation may overflow for large collation sequences and may cause a
  stack or buffer overflow.  This is now fixed to use a slower algorithm
  which does not use a cache if there is an integer overflow.

* CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
  rules for large collation sequences to optimize multiple passes and falls
  back to alloca if malloc fails, resulting in a possible stack overflow.
  The implementation now falls back to an uncached collation sequence lookup
  if malloc fails.

* CVE-2013-4788 The pointer guard used for pointer mangling was not
  initialized for static applications resulting in the security feature
  being disabled. The pointer guard is now correctly initialized to a
  random value for static applications. Existing static applications need
  to be recompiled to take advantage of the fix (bug 15754).

* CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
  to the d_name member of struct dirent, or omit the terminating NUL
  character.  (Bugzilla #14699).

* CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
  aligned_alloc functions could allocate too few bytes or corrupt the
  heap when passed very large allocation size values (Bugzilla #15855,
  #15856, #15857).

* CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
  for AF_INET6 has been fixed (Bugzilla #16072).

* New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
  pap_CW, quz_PE, the_NP.

* Substantially revised locales: gd_GB, ht_HT

* The LC_ADDRESS field was updated to support country_car for almost all
  supported locales.

* ISO 1427 definitions were updated.

* ISO 3166 definitions were updated.

* The localedef utility now supports --big-endian and --little-endian
  command-line options to generate locales for a different system from that
  for which the C library was built.

* Binary locale files now only depend on the endianness of the system for
  which they are generated and not on other properties of that system.  As a
  consequence, binary files generated with new localedef may be incompatible
  with old versions of the GNU C Library, and binary files generated with
  old localedef may be incompatible with this version of the GNU C Library,
  in the following circumstances:

  + Locale files may be incompatible on m68k systems.

  + Locale archive files (but not separate files for individual locales) may
    be incompatible on systems where plain "char" is signed.

* The configure option --disable-versioning has been removed.  Builds with
  --disable-versioning had not worked for several years.

* ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
  cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).

* SystemTap probes for malloc have been introduced.

* SystemTap probes for slow multiple precision fallback paths of
  transcendental functions have been introduced.

* Support for powerpc64le has been added.

* The soft-float powerpc port now supports e500 processors.

* Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.

* A new feature test macro _DEFAULT_SOURCE is available to enable the same
  set of header declarations that are enabled by default, even when other
  feature test macros or compiler options such as -std=c99 would otherwise
  disable some of those declarations.

* The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
  conflict with POSIX.  The libbsd-compat library (which was a dummy library
  that did nothing) has also been removed.

* Preliminary documentation about Multi-Thread, Async-Signal and
  Async-Cancel Safety has been added.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adam Buchbinder
Adam Conrad
Adhemerval Zanella
Alan Modra
Alexandre Oliva
Allan McRae
Andreas Arnez
Andreas Jaeger
Andreas Krebbel
Andreas Schwab
Andrew Hunter
Andrew Pinski
Anton Blanchard
Arun Kumar Pyasi
Aurelien Jarno
Brooks Moses
Bruno Haible
Carlos O'Donell
Chris Leonard
Chris Metcalf
Chung-Lin Tang
David Holsgrove
David S. Miller
Eric Biggers
Eric Blake
Eric Wong
Fabrice Bauzac
Fernando J. V. da Silva
Florian Weimer
Guy Martin
H.J. Lu
Jan Kratochvil
Jia Liu
Joseph Myers
Kaz Kojima
Liubov Dmitrieva
Maciej W. Rozycki
Marc-Antoine Perennou
Marcus Shawcroft
Marko Myllynen
Markus Trippelsdorf
Maxim Kuvyrkov
Meador Inge
Michael Bauer
Michael Stahl
Mike Frysinger
Olivier Langlois
Ondřej Bílka
Patrick 'P. J.' McDermott
Paul Eggert
Paul Pluzhnikov
Pavel Simerda
Petr Machata
Rajalakshmi Srinivasaraghavan
Reuben Thomas
Richard Henderson
Richard Sandiford
Roland McGrath
Ryan S. Arnold
Sami Kerola
Samuel Thibault
Siddhesh Poyarekar
Stefan Liebler
Steve Ellcey
Thomas Schwinge
Toke Høiland-Jørgensen
Tom Tromey
Torvald Riegel
Ulrich Weigand
Uros Bizjak
Venkataramanan Kumar
Ville Skytta
Vinitha Vijayan
Wei-Lun Chao
Will Newton
Yogesh Chaudhari
Yuri Chornoivan
Yuriy Kaminskiy

The GNU C Library
=================

The GNU C Library version 2.18 is now available.

The GNU C Library is used as *the* C library in the GNU systems
and most systems with the Linux kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.18 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.18
====================

* The following bugs are resolved with this release:

  2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
  11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
  14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
  14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
  14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
  15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
  15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
  15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
  15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
  15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
  15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
  15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
  15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
  15759.

* CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
  has been fixed by disabling the use of pt_chown (Bugzilla #15755).
  Distributions can re-enable building and using pt_chown via the new configure
  option `--enable-pt_chown'.  Enabling the use of pt_chown carries with it
  considerable security risks and should only be used if the distribution
  understands and accepts the risks.

* CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
  #15078).

* CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
  fixed (Bugzilla #15330).

* Add support for calling C++11 thread_local object destructors on thread
  and program exit.  This needs compiler support for offloading C++11
  destructor calls to glibc.

* Improved worst case performance of libm functions with double inputs and
  output.

* Support for priority inherited mutexes in pthread condition variables on
  non-x86 architectures.

* Port to Xilinx MicroBlaze contributed by David Holsgrove.

* Optimized string functions for AArch64.  Implemented by Marcus Shawcroft.

* Optimized string functions for ARM.  Implemented by Will Newton and
  Richard Henderson.

* Optimized libm functions for SPARC.  Implemented by David S. Miller.

* Support for building more of ARM glibc as Thumb-2 code.  Implemented by
  Richard Henderson.

* Support for building most of MIPS glibc as MIPS16 code.  Implemented by
  Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.

* Added a benchmark framework to track performance of functions in glibc.

* New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
  It is based on draft TS 18661 and currently enabled as a GNU extension.

* On Linux, the clock function now uses the clock_gettime system call
  for improved precision, rather than old times system call.

* Added new API functions pthread_getattr_default_np and
  pthread_setattr_default_np to get and set the default pthread
  attributes of a process.

* Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
  This may improve lock scaling of existing programs on TSX capable systems.
  When the --enable-lock-elision=yes parameter is specified at configure
  time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
  mutexes.

* Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
  availability).  Implemented by Ryan S. Arnold.

* Support added for POWER8 platform.  Implemented by Ryan S. Arnold.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adam Conrad
Adhemerval Zanella
Alan Modra
Allan McRae
Andi Kleen
Andreas Jaeger
Andreas Krebbel
Andreas Schwab
Anton Blanchard
Aurelien Jarno
Ben Norht
Bruno Haible
Carlos O'Donell
Chris Leonard
Chris Metcalf
Christian Grönke
David Holsgrove
David S. Miller
Dmitry V. Levin
Dominik Vogt
Edjunior Barbosa Machado
Edjunior Machado
Florian Weimer
H.J. Lu
Heiko Carstens
Jakub Jelinek
Jan Kratochvil
Jan-Benedict Glaw
Jeff Law
Jeroen Albers
Johan Heikkila
Joseph Myers
Kaz Kojima
Kirk Meyer
Liubov Dmitrieva
Maciej W. Rozycki
Mans Rullgard
Marcus Shawcroft
Mark H Weaver
Marko Myllynen
Markus Trippelsdorf
Maxim Kuvyrkov
Mike Frysinger
Nathan Froyd
Nathan Sidwell
Nik Kalach
Ondrej Bilka
Patsy Franklin
Paul Eggert
Paul Pluzhnikov
Peter Collingbourne
Petr Baudis
Petr Machata
Pierre Ynard
Pino Toscano
Richard Henderson
Richard Smith
Roland McGrath
Ryan S. Arnold
Siddhesh Poyarekar
Steve Ellcey
Thomas Schwinge
Thorsten Kukuk
Tom de Vries
Vladimir Nikulichev
Will Newton

The GNU C Library
=================

The GNU C Library version 2.17 is now available.

The GNU C Library is used as *the* C library in the GNU systems
and most systems with the Linux kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C11 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.17 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.17
====================

* The following bugs are resolved with this release:

  1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
  9685, 9914, 10014, 10038, 10114, 10631, 10873, 11438, 11607, 11638, 11741,
  12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679, 13696,
  13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950, 13952,
  13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157, 14166,
  14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298, 14303,
  14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376, 14417,
  14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518, 14519,
  14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568, 14576,
  14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645, 14648,
  14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719, 14743,
  14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803, 14805,
  14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833, 14835,
  14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872, 14879,
  14889, 14893, 14898, 14914.

* Optimization of memcpy for MIPS.

* CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
  EMFILE has been fixed (Bugzilla #14889).

* The add-on ports collection is now distributed in the "ports" subdirectory
  of the main GNU C Library distribution, rather than separately.

* Port to ARM AArch64 contributed by Linaro.

* Support for STT_GNU_IFUNC symbols added for s390 and s390x.
  Optimized versions of memcpy, memset, and memcmp added for System z10 and
  zEnterprise z196.
  Implemented by Andreas Krebbel.

* The new function secure_getenv allows secure access to the environment,
  returning NULL if running in a SUID/SGID process.  This function replaces
  the internal function __secure_getenv.

* SystemTap static probes have been added into the dynamic linker.
  Implemented by Gary Benson.

* Optimizations of string functions strstr, strcasestr and memmem.
  Implemented by Maxim Kuvyrkov.

* The minimum Linux kernel version that this version of the GNU C Library
  can be used with is 2.6.16.

* Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
  powerpc POWER7.  Implemented by Will Schmidt.

* New configure option --disable-nscd builds the C library such that it
  never attempts to contact the Name Service Caching Daemon (nscd).
  New configure option --disable-build-nscd avoids building nscd itself;
  this is the default if --disable-nscd is used.

* Improved support for cross-compilation, including cross-testing and
  bootstrap builds without a previously built glibc.

* Several testsuite tests are now able to test multiple IFUNC variants of an
  interface, rather than just testing the one that would be chooen by
  default.

* New configure options --with-bugurl and --with-pkgversion, for
  distributors to use to embed their bug-reporting and package version
  information in --help and --version output.

* The ttyname and ttyname_r functions on Linux now fall back to searching for
  the tty file descriptor in /dev/pts or /dev if /proc is not available.  This
  allows creation of chroots without the procfs mounted on /proc.

* The `crypt' function now fails if passed salt bytes that violate the
  specification for those values.  On Linux, the `crypt' function will
  consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
  enabled, and fail on encrypted strings using the MD5 or DES algorithm
  when the mode is enabled.

* The `clock_*' suite of functions (declared in <time.h>) is now available
  directly in the main C library.  Previously it was necessary to link with
  -lrt to use these functions.  This change has the effect that a
  single-threaded program that uses a function such as `clock_gettime' (and
  is not linked with -lrt) will no longer implicitly load the pthreads
  library at runtime and so will not suffer the overheads associated with
  multi-thread support in other code such as the C++ runtime library.

* New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
  sat_IN, and szl_PL.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adam Conrad
Adhemerval Zanella
Alan Modra
Alexander Kanevskiy
Alexandre Oliva
Allan McRae
Andreas Jaeger
Andreas Krebbel
Andreas Schwab
Andrej Lajovic
Andrew Haley
Andrew Stubbs
Aurelien Jarno
Benno Schulenberg
Brendan Kehoe
Carlos O'Donell
Chandrakala Chavva
Chris Leonard
Chris Metcalf
Daniel Gutson
Daniel Jacobowitz
David Alan Gilbert
David S. Miller
Dmitry V. Levin
Eagle Burkut
Florian Pritz
Florian Weimer
GOTO Masanori
Gary Benson
Greg McGary
Guido Guenther
H.J. Lu
Jakub Jelinek
Jeff Bailey
Jeff Law
Jeroen van Bemmel
Jim Blandy
Jim Meyering
John Tobey
Jonathan Nieder
Joseph Myers
Julian Brown
Ken Werner
Khem Raj
Konstantinos Margaritis
Liubov Dmitrieva
Luis Machado
Manjunath Matti
Marcus Shawcroft
Marek Polacek
Mark Salter
Marko Myllynen
Markus Trippelsdorf
Matt Turner
Maxim Kuvyrkov
Michael Cree
Michael Hope
Mike Frysinger
Mike Hommey
Mischa Jonker
Nathan Froyd
Nathan Sidwell
Nik Kalach
Paul Brook
Paul Eggert
Peng Haitao
Petar Jovanovic
Peter Green
Petr Machata
Phil Blundell
Philip Blundell
Pino Toscano
Pravin Satpute
Ramana Radhakrishnan
Richard Henderson
Richard Sandiford
Robert Millan
Roland McGrath
Ryan S. Arnold
Ryosei Takagi
Samuel Thibault
Sebastan Andrzej Siewior
Siddhesh Poyarekar
Steve Ellcey
Steve McIntyre
Thomas Bushnell, BSG
Thomas Schwinge
Thorsten Glaser
Tom de Vries
Torbjorn Granlund
Tulio Magno Quites Machado Filho
Ulrich Drepper
Ulrich Weigand
Viju Vincent
Will Schmidt

libc and ports repositories merged as of the 2.16.0 release.

The GNU C Library
=================

The GNU C Library version 2.16 is now available.

The GNU C Library is used as *the* C library in the GNU systems
and most systems with the Linux kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C99 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.16 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.16
=====================

* The following bugs are resolved with this release:

  174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
  2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
  3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
  4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
  6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
  10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
  11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
  12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
  13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
  13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
  13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
  13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
  13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
  13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
  13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
  13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
  13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
  13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
  13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
  14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
  14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
  14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
  14278

* Support for the x32 ABI on x86-64 added.  The x32 target is selected by
  configuring glibc with:
        BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
  Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
  Implemented by H.J. Lu.

* ISO C11 support:

  + define static_assert

  + do not declare gets

  + declare at_quick_exit and quick_exit also for ISO C11

  + aligned_alloc.  NB: The code is deliberately allows the size parameter
    to not be a multiple of the alignment.  This is a moronic requirement
    in the standard but it is only a requirement on the caller, not the
    implementation.

  + timespec_get added

  + uchar.h support added

  + CMPLX, CMPLXF, CMPLXL added

  Implemented by Ulrich Drepper.

* Support for the IA-64 has been moved to ports.

* Remove support for anything but ELF binary format

* Checking versions of poll, ppoll added.
  Implemented by Ulrich Drepper.

* More generic and 64-bit performance optimizations to math functions.
  Implemented by Ulrich Drepper.

* New configure option --enable-obsolete-rpc makes the deprecated RPC
  headers and functions available at compile time as they were before
  version 2.14.  This option will be removed at some time in the future
  after the TI-RPC library becomes fully sufficient for the needs of
  existing applications.

* Compatibility code for Linux kernel versions before 2.4 has been removed.
  Note that glibc is not expected to work with any Linux kernel version
  before 2.6.

* New header <sys/auxv.h> and function getauxval allowing easy access to
  the AT_* key-value pairs passed from the Linux kernel.  The header also
  defines the HWCAP_* bits associated with the AT_HWCAP key.

* New locales: mag_IN

* New configure option --enable-systemtap builds SystemTap static probes
  into libc for setjmp and longjmp and into libpthread for various operations.
  So far the setjmp/longjmp probes and some of the libpthread probes are
  provided only for i*86 and x86_64.
  Implemented by Roland McGrath and Rayson Ho.

* Optimized expf for x86-32 and x86-64.  Implemented by Liubov Dmitrieva.

* More optimized functions for PowerPC.  Implemented by Adhemerval Zanella
  and Will Schmidt.

* More optimized functions for SPARC.  Implemented by David S. Miller.

* Improved support for cross-compilation, especially bootstrap builds
  without a previously built glibc.

* Ports for the TILE-Gx and TILEPro families of processors.  Contributed by
  Chris Metcalf from Tilera.

* Support for the old ARM ABI has been removed from ports.  Only the EABI is
  now supported for ARM processors.

* The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
  as the name of the dynamic linker, to distinguish it from the
  /lib/ld-linux.so.3 dynamic linker used for the base EABI.

* Support for CRIS has been removed from ports.

* A new class of installed header has been documented for low-level
  platform-specific functionality.  PowerPC added the first instance with a
  function to provide time base register access.  Contributed by Tulio
  Magno Quites Machado Filho.

* ix86 configurations now install header files that are consistent with
  what x86-64 configurations install.  These same header files can be used
  for -m32, -m64, or -mx32 builds.
  Contributed by H.J. Lu.

* Math library bug fixes.  A thorough audit of all open math library bugs was
  conducted by Joseph Myers.  Significant progress was made on many math
  library bugs resulting in more accurate exceptions and function results.
  Many thanks to all those that contributed including Andreas Jaeger for his
  patch review and work on the x87 trigonometric instruction issues.

* Timezone data is no longer installed.  Timezone-related binaries and scripts
  will continue to be installed.  Users should obtain their timezone data from
  their distribution provider or from the tzdata package at
  <ftp://munnari.oz.au/pub/>.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Allan McRae
Andreas Jaeger
Andreas Krebbel
Andreas Schwab
Antoine Balestrat
Anton Blanchard
Aurelien Jarno
Carlos O'Donell
Carlos Sánchez de La Lama
Chandan Kumar
Chris Demetriou
Chris Leonard
Chris Metcalf
Chung-Lin Tang
Cyril Hrubis
David S. Miller
Dwayne Grant McConnell
Fabrice Bauzac
H.J. Lu
Ian Wienand
Jakub Jelinek
Jan Kratochvil
Jeff Law
Jim Meyering
Joseph Myers
Kai Tietz
Kaz Kojima
Kees Cook
Liubov Dmitrieva
Marek Polacek
Markus Trippelsdorf
Maxim Kuvyrkov
Michael Matz
Mike Frysinger
Nick Bowler
Nicolas Boulenguez
Nix
Paul Bolle
Paul Eggert
Paul Pluzhnikov
Petr Baudis
Pino Toscano
Rafe Kettler
Rayson Ho
Richard Henderson
Robert Millan
Roland Mc Grath
Roland McGrath
Ryan S. Arnold
Samuel Thibault
Serkan Kaba
Siddhesh Poyarekar
Simon Josefsson
Stanislav Brabec
Stephen Compall
Thomas Schwinge
Tom de Vries
Tulio Magno Quites Machado Filho
Ulrich Drepper
Will Schmidt

The GNU C Library
=================

The GNU C Library version 2.16 is now available.

The GNU C Library is used as *the* C library in the GNU systems
and most systems with the Linux kernel.

The GNU C Library is primarily designed to be a portable
and high performance C library.  It follows all relevant
standards including ISO C99 and POSIX.1-2008.  It is also
internationalized and has one of the most complete
internationalization interfaces known.

The GNU C Library webpage is at http://www.gnu.org/software/libc/

Packages for the 2.16 release may be downloaded from:
        http://ftpmirror.gnu.org/libc/
        http://ftp.gnu.org/gnu/libc/

The mirror list is at http://www.gnu.org/order/ftp.html

NEWS for version 2.16
=====================

* The following bugs are resolved with this release:

  174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
  2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
  3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
  4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
  6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
  10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
  11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
  12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
  13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
  13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
  13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
  13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
  13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
  13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
  13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
  13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
  13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
  13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
  13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
  14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
  14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
  14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
  14278

* Support for the x32 ABI on x86-64 added.  The x32 target is selected by
  configuring glibc with:
        BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
  Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
  Implemented by H.J. Lu.

* ISO C11 support:

  + define static_assert

  + do not declare gets

  + declare at_quick_exit and quick_exit also for ISO C11

  + aligned_alloc.  NB: The code is deliberately allows the size parameter
    to not be a multiple of the alignment.  This is a moronic requirement
    in the standard but it is only a requirement on the caller, not the
    implementation.

  + timespec_get added

  + uchar.h support added

  + CMPLX, CMPLXF, CMPLXL added

  Implemented by Ulrich Drepper.

* Support for the IA-64 has been moved to ports.

* Remove support for anything but ELF binary format

* Checking versions of poll, ppoll added.
  Implemented by Ulrich Drepper.

* More generic and 64-bit performance optimizations to math functions.
  Implemented by Ulrich Drepper.

* New configure option --enable-obsolete-rpc makes the deprecated RPC
  headers and functions available at compile time as they were before
  version 2.14.  This option will be removed at some time in the future
  after the TI-RPC library becomes fully sufficient for the needs of
  existing applications.

* Compatibility code for Linux kernel versions before 2.4 has been removed.
  Note that glibc is not expected to work with any Linux kernel version
  before 2.6.

* New header <sys/auxv.h> and function getauxval allowing easy access to
  the AT_* key-value pairs passed from the Linux kernel.  The header also
  defines the HWCAP_* bits associated with the AT_HWCAP key.

* New locales: mag_IN

* New configure option --enable-systemtap builds SystemTap static probes
  into libc for setjmp and longjmp and into libpthread for various operations.
  So far the setjmp/longjmp probes and some of the libpthread probes are
  provided only for i*86 and x86_64.
  Implemented by Roland McGrath and Rayson Ho.

* Optimized expf for x86-32 and x86-64.  Implemented by Liubov Dmitrieva.

* More optimized functions for PowerPC.  Implemented by Adhemerval Zanella
  and Will Schmidt.

* More optimized functions for SPARC.  Implemented by David S. Miller.

* Improved support for cross-compilation, especially bootstrap builds
  without a previously built glibc.

* Ports for the TILE-Gx and TILEPro families of processors.  Contributed by
  Chris Metcalf from Tilera.

* Support for the old ARM ABI has been removed from ports.  Only the EABI is
  now supported for ARM processors.

* The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
  as the name of the dynamic linker, to distinguish it from the
  /lib/ld-linux.so.3 dynamic linker used for the base EABI.

* Support for CRIS has been removed from ports.

* A new class of installed header has been documented for low-level
  platform-specific functionality.  PowerPC added the first instance with a
  function to provide time base register access.  Contributed by Tulio
  Magno Quites Machado Filho.

* ix86 configurations now install header files that are consistent with
  what x86-64 configurations install.  These same header files can be used
  for -m32, -m64, or -mx32 builds.
  Contributed by H.J. Lu.

* Math library bug fixes.  A thorough audit of all open math library bugs was
  conducted by Joseph Myers.  Significant progress was made on many math
  library bugs resulting in more accurate exceptions and function results.
  Many thanks to all those that contributed including Andreas Jaeger for his
  patch review and work on the x87 trigonometric instruction issues.

* Timezone data is no longer installed.  Timezone-related binaries and scripts
  will continue to be installed.  Users should obtain their timezone data from
  their distribution provider or from the tzdata package at
  <ftp://munnari.oz.au/pub/>.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

Adhemerval Zanella
Allan McRae
Andreas Jaeger
Andreas Krebbel
Andreas Schwab
Antoine Balestrat
Anton Blanchard
Aurelien Jarno
Carlos O'Donell
Carlos Sánchez de La Lama
Chandan Kumar
Chris Demetriou
Chris Leonard
Chris Metcalf
Chung-Lin Tang
Cyril Hrubis
David S. Miller
Dwayne Grant McConnell
Fabrice Bauzac
H.J. Lu
Ian Wienand
Jakub Jelinek
Jan Kratochvil
Jeff Law
Jim Meyering
Joseph Myers
Kai Tietz
Kaz Kojima
Kees Cook
Liubov Dmitrieva
Marek Polacek
Markus Trippelsdorf
Maxim Kuvyrkov
Michael Matz
Mike Frysinger
Nick Bowler
Nicolas Boulenguez
Nix
Paul Bolle
Paul Eggert
Paul Pluzhnikov
Petr Baudis
Pino Toscano
Rafe Kettler
Rayson Ho
Richard Henderson
Robert Millan
Roland Mc Grath
Roland McGrath
Ryan S. Arnold
Samuel Thibault
Serkan Kaba
Siddhesh Poyarekar
Simon Josefsson
Stanislav Brabec
Stephen Compall
Thomas Schwinge
Tom de Vries
Tulio Magno Quites Machado Filho
Ulrich Drepper
Will Schmidt

Translation project snapshot for 2.16

glibc 2.15 release

glibc 2.14.1 release

Tag 2.14 release