GNU C Library NEWS -- history of user-visible changes.
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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).

The following bugs are resolved with this release:

  [984] network: Respond to changed resolv.conf in gethostbyname
  [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
  [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
    fields
  [12189] libc: __stack_chk_fail should not attempt a backtrace
    (CVE-2010-3192)
  [14096] time: Race condition on timezone/tst-timezone.out
  [14172] localedata: az_IR: new locale
  [14995] build: glibc fails to build if gold is the default linker, even if
    ld.bfd is available
  [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
  [16637] network: inet_pton function is accepting IPv6 with bad format
  [16640] string: string/strtok.c: undefined behaviour inconsistent between
    x86 and other generic code
  [16875] localedata: ko_KR: fix lang_name
  [17225] localedata: ar_SY: localized month names for May and June are
    incorrect
  [17297] localedata: da_DK: wrong date_fmt string
  [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
  [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
  [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
  [19066] localedata: ar_SA abbreviated day and month names are in English
  [19569] network: resolv: Support an arbitrary number of search domains
  [19570] network: Implement random DNS server selection in the stub
    resolver
  [19838] locale: localedef fails on PA-RISC
  [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
    order of 0D36 and 0D37
  [19922] localedata: iso14651_t1_common: Define collation for Malayalam
    chillu characters
  [20098] libc: FAIL: debug/backtrace-tst on hppa
  [20257] network: sunrpc: clntudp_call does not enforce timeout when
    receiving data
  [20275] localedata: locale day/abday/mon/abmon should not have trailing
    whitespace
  [20313] localedata: Update locale data to Unicode 9.0
  [20424] manual: Document how to provide a malloc replacement
  [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
    for Peru
  [20686] locale: Add el_GR@euro to SUPPORTED.
  [20831] dynamic-link: _dl_map_segments does not test for __mprotect
    failures consistently
  [21015] dynamic-link: Document and fix --enable-bind-now
  [21016] nptl: pthread_cond support is broken on hppa
  [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
    frame-pointer on i386
  [21049] libc: segfault in longjmp_chk() due to clobbered processor
    register
  [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
  [21088] libc: Build fails with --enable-static-nss
  [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
    generic c code is used
  [21109] libc: Tunables broken on big-endian
  [21112] math: powf has large ulp errors with base close to 1 and exponent
    around 4000
  [21115] network: sunrpc: Use-after-free in error path in clntudp_call
    (CVE-2017-12133)
  [21120] malloc: glibc malloc is incompatible with GCC 7
  [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
    with -lieee
  [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
    (-0.0) when linking with -lieee
  [21171] math: log10, log2 and lgamma return incorrect results
  [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
  [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
  [21207] localedata: ce_RU: update weekdays from CLDR
  [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
  [21217] localedata: Update months from CLDR-31
  [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
  [21243] libc: support_delete_temp_file should issue warning for failed
    remove()
  [21244] libc: support resolv_test_start() socket fd close should be
    checked for errors.
  [21253] libc: localedef randomly segfaults when using -fstack-check due to
    new posix_spawn implementation
  [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
    leads to lower CPU frequency
  [21259] libc: [alpha] termios.h missing IXANY for POSIX
  [21261] libc: [sparc64] bits/setjmp.h namespace
  [21267] network: [mips] bits/socket.h IOC* namespace
  [21268] libc: [alpha] termios.h NL2, NL3 namespace
  [21270] libc: mmap64 silently truncates large offset values
  [21275] libc: posix_spawn always crashes on ia64 now
  [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
  [21280] math: [powerpc] logbl for POWER7 return incorrect results
  [21289] libc: Incorrect declaration for 32-bit platforms with
    _FILE_OFFSET_BITS=64 causes build error
  [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
    not support gethostbyname4_r
  [21298] nptl: rwlock can deadlock on frequent reader/writer phase
    switching
  [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
    arenas
  [21340] libc: Support POSIX_SPAWN_SETSID
  [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
  [21359] network: ns_name_pack needs additional byte in destination buffer
  [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
    against fragmentation attacks (CVE-2017-12132)
  [21369] network: resolv: Remove EDNS fallback
  [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
    and _POSIX_C_SOURCE
  [21386] nptl: Assertion in fork for distinct parent PID is incorrect
  [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
  [21393] stdio: Missing dup3 error check in freopen, freopen64
  [21396] libc: Use AVX2 memcpy/memset on Skylake server
  [21399] localedata: Bad description for U00EC in
    localedata/charmaps/CP1254
  [21411] malloc: realloc documentation error
  [21426] network: sys/socket.h uio.h namespace
  [21428] libc: [aarch64] tst-backtrace5 testsuite failure
  [21445] libc: signal.h bsd_signal namespace
  [21455] network: Network headers stdint.h namespace
  [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
    retry value
  [21475] network: resolv: Overlong search path is truncated mid-label
  [21511] libc: sigstack namespace
  [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
  [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
    bits/syscall.h: No  such file or directory
  [21517] libc: struct sigaltstack namespace
  [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
  [21533] localedata: Update locale data to Unicode 10.0
  [21537] libc:
    ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
    junk at end of line, first unrecognized character is `@'
  [21538] libc: SIG_HOLD missing for XPG4
  [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
    request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
  [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
  [21543] libc: sigevent namespace
  [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
    size for general purpose registers in mcontext_t structure
  [21550] libc: sigwait namespace
  [21552] libc: XPG4 bsd_signal namespace
  [21554] libc: sigpause namespace
  [21560] libc: sys/wait.h signal.h namespace
  [21561] libc: waitid namespace
  [21573] nptl: GCC 7: /usr/bin/install: cannot remove
    '/usr/include/stdlib.h': Permission denied
  [21575] libc: sys/wait.h missing struct rusage definition
  [21584] libc: sigaltstack etc namespace
  [21597] libc: siginterrupt namespace
  [21607] math: hppa: FAIL: math/test-tgmath
  [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
    issue on x86-64
  [21622] libc: [tile] missing SA_* for POSIX.1:2008
  [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
    stack and heap (CVE-2017-1000366)
  [21625] libc: wait3 namespace
  [21654] nss: Incorrect pointer alignment in NSS group merge result
    construction
  [21657] network: Parse interface zone id for node-local multicast
  [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
    between_2_3
  [21666] libc: .symver is used on common symbol
  [21668] network: resolv: res_init cross-thread broadcast introduces race
    conditions
  [21687] math: tgmath.h totalorder, totalordermag return type
  [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
    Hindi Locale
  [21696] libc: Incorrect assumption of of __cpu_mask in
    posix/sched_cpucount.c
  [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
  [21706] localedata: yesstr and nostr  are missing for Breton [LC_MESSAGES]
    locale
  [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
    leading to relocation crash
  [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
    `resolv_conf_matches (resp, conf)' failed.
  [21710] localedata: Added Samoan language locale for Samoa
  [21711] localedata: Pashto yesstr/nostr locale are missing
  [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
    __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
  [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
  [21723] localedata: yesstr/nostr missing for Chinese language locale
  [21724] localedata: yesstr and nostr  are missing for  Xhosa [LC_MESSAGES]
    locale
  [21727] localedata: yesstr and nostr  are missing for Tsonga [LC_MESSAGES]
    locale
  [21728] localedata: New Locale for Tongan language
  [21729] localedata: incorrect LC_NAME fields for hi_IN
  [21733] localedata: yesstr and nostr  are missing for zh_HK
  [21734] localedata: Missing yesstr and nostr  are for kw_GB
  [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
  [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
  [21742] libc: _dl_num_cache_relocations is undefined in libc.a
  [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
    strings
  [21744] libc: Tests failing on --enable-tunables --enable-stack-
    protector=all
  [21749] localedata: Wrong abbreviated day name (“abday”) for
    ar_JO/ar_LB/ar_SY
  [21756] localedata: missing yesstr, nostr  for nds_DE and nds_NL
  [21757] localedata: missing yesstr, nostr  for pap_AW and pap_CW
  [21759] localedata: missing yesstr and nostr for Tigrinya
  [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
  [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
  [21767] localedata: Missing Bislama locales
  [21768] localedata: Missing yesstr and nostr for aa_ET
  [21770] localedata: Missing  Field in li_NL
  [21778] nptl: Robust mutex may deadlock
  [21779] libc: MicroBlaze segfaults when loading libpthread
  [21783] localedata: Fix int_select international_call_prefixes
  [21784] localedata: Inconsistency  in country_isbn
  [21788] localedata: Missing  Country Postal Abbreviations
  [21794] localedata: Added-country_isbn-for-Italy
  [21795] localedata: Add/Fix country_isbn for France
  [21796] localedata: Added country_isbn for Republic of Korea
  [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
  [21799] localedata: Added int_select international_call_prefixes
  [21801] localedata: Added int_select international_call_prefixes
  [21804] nptl: Double semicolon in thread-shared-types.h
  [21807] localedata: LC_ADDRESS fix for pap_CW
  [21808] localedata: Fix LC_ADDRESS for pap_AW
  [21821] localedata: Added country_name in mai_IN
  [21822] localedata: Fix LC_TIME for mai_IN
  [21823] localedata: missing yesstr, nostr  for sa_IN
  [21825] localedata: Fix name_mrs for mag_IN
  [21828] localedata: 2.26 changelog should mention user visible changes
    with unicode 9.0
  [21835] localedata: Added Maithili language locale for Nepal
  [21838] localedata: Removed redundant data for the_NP
  [21839] localedata: Fix LC_MONETARY for ta_LK
  [21844] localedata: Fix Latin characters and Months Sequence.
  [21848] localedata: Fix mai_NP Title Name


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)

The following bugs are resolved with this release:

  [4099] stdio: Overly agressive caching by stream i/o functions.
  [7065] build: Support building glibc with -fstack-protector or -fstack-
    protector-all
  [9842] localedata: en_CA: incorrect date format
  [13165] nptl: pthread_cond_wait() can consume a signal that was sent
    before it started waiting
  [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
  [15765] nptl: sem_open is wrongly a cancellation point
  [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
  [16458] libc: endian.h and netinet/in.h byte order macros return values of
    wrong type
  [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
    library linked with pthread
  [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
    "FIXME: Ingo" issue)
  [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
  [17252] libc: getrandom and getentropy syscall
  [17730] malloc: thread-local storage is sometimes improperly free()'d
    after being __libc_memalign()'d
  [18241] stdio: failed fseek on memstream does not set errno and can fail
    when it shouldnt
  [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
    not
  [18463] nptl: pthread_cond_broadcast issue when surrounded by
    PTHREAD_PRIO_INHERIT mutex on ARM
  [18784] network: res_query and related function crash for special record
    type queries (CVE-2015-5180)
  [19380] math: strtod does not raise "inexact"
  [19387] string: Integer overflow in memchr
  [19390] string: Integer overflow in strncat
  [19398] build: linknamespace tests fail with massively parallel build
  [19402] nptl: Deadlock with robust shared mutex and asynchronous
    termination
  [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
  [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
  [19514] libc: [PATCH] Fix spelling errors in spelling
    "implement"/"implementation" in several places
  [19582] network: Deprecate RES_USE_INET6
  [19673] manual: clog10 docs appear to be erroneous
  [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
    causes a segmentation fault
  [19826] libc: invalid pointer returned from __tls_get_addr with static
    linking
  [20016] network: resolv: Remove hooks support from the API
  [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
    uninitialized GOT
  [20033] math: [x86_64] vectorized math function don't call the __finite
    versions
  [20116] nptl: use after free in pthread_create
  [20181] stdio: open_memstream(): writes not at end of stream corrupt data
  [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
    is always true.
  [20311] nptl: please install proc_service.h
  [20366] libc: Compilation errors in installed headers in strict-compliance
    modes
  [20370] malloc: malloc: Arena free list management is still racy
    (incorrect fix in bug 19243)
  [20386] libc: assert (X = 0) does not result in GCC warning
  [20432] malloc: malloc: Minimize interface required for interposition
  [20435] libc: Missing unwind info in __startcontext causes infinite loop
    in _Unwind_Backtrace (CVE-2016-6323)
  [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
  [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
    libpthread.a
  [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
  [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
  [20477] network: resolv: incorrect double-checked locking related to
    _res_hconf
  [20478] libc: libc_ifunc macro and similar usages leads to false debug-
    information.
  [20495] math: x86_64 performance degradation due to AVX/SSE transition
    penalty
  [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
  [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
    cause transition penalty
  [20517] math: sparcv9 missing fdiml compat symbol
  [20524] manual: strverscmp is inconsistent
  [20525] libc: <sys/quota.h> should be based on kernel headers
  [20539] math: GCC 7 -static -lm fails to link at -O3
  [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
    mcount.oS)
  [20558] string: POSIX bcopy/bzero decls do not implement Object Size
    Checking
  [20591] network: Remove obsolete DNSSEC support
  [20592] network: DNS resource record type classification macros in
    <arpa/nameser.h> are incorrect
  [20593] network: Update DNS RR type definitions
  [20611] network: getaddrinfo accepts invalid numeric scope IDs
  [20615] build: glibc build fails when using --with-cpu=power9 --enable-
    multi-arch
  [20629] network: libresolv: Remove support for bitstring labels
    (RES_USEBSTRING)
  [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
    assertion: "maxidx >= 2"
  [20660] math: [arm] Use VSQRT
  [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
    -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
  [20689] libc: Test for FMA should also check for AVX.
  [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
  [20715] math: iszero macro breaks existing code
  [20718] math: [powerpc] copysignl raises "invalid" for sNaN
  [20728] libc: powerpc: Missing TOC stub in clone
  [20729] build: glibc-2.24 fails to build for i486 with -Os
  [20750] build: Build fails with default PIE enabled gcc-6.x
  [20768] math: [alpha] sqrt fegetenv namespace
  [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
    glibc
  [20787] math: float_t is defined as float incorrectly on x86_64 even if
    __FLT_EVAL_METHOD__ is 2
  [20790] network: rpcgen buffer overrun in get_prog_declaration
  [20822] nptl: race condition in __lll_unlock_elision on powerpc
  [20829] libc: crypt snprintf namespace
  [20847] libc: tst-vfork3 failure
  [20855] math: Default bits/mathdef.h has inappropriate float_t
  [20859] math: [sh4] FP_ILOGB0 invalid
  [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
    U+20AC), not same as GBK
  [20915] dynamic-link: global-dynamic TLS broken on aarch64
  [20916] math: pow handling of sNaN arguments
  [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
  [20919] math: Bad pow (qNaN, 0) result with -lieee
  [20940] math: hypot sNaN handling
  [20947] math: fmax, fmin sNaN handling
  [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
  [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
    RES_USE_INET6
  [20971] string: powerpc64/power7 memchr overflows internal pointer check
  [20973] nptl: robust mutexes: Lost wake-ups
  [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
  [20978] nis: strlen on null pointer in nss_nisplus
  [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
    wrong condition
  [21014] string: i686 memchr overflows internal pointer check
  [21019] libc: [mips] n32 lseek incorrect on overflow
  [21022] libc: [microblaze] __backtrace get_frame_size namespace
  [21026] libc: [MIPS] readahead syscall is broken on n64
  [21028] math: Fallback fesetexceptflag should always succeed
  [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
  [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
    clang
  [21053] libc: [SH] Namespace pollution from sys/ucontext.h
  [21061] librt: [microblaze] librt lost clock_* exports
  [21073] libc: tunables: insecure environment variables passed to
    subprocesses with AT_SECURE
  [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S

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
