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Version 2.28

Major new features:

* The localization data for ISO 14651 is updated to match the 2016
  Edition 4 release of the standard, this matches data provided by
  Unicode 9.0.0.  This update introduces significant improvements to the
  collation of Unicode characters.  This release deviates slightly from
  the standard in that the collation element ordering for lowercase and
  uppercase LATIN script characters is adjusted to ensure that regular
  expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
  is not matched by [a-z].  With the update many locales have been
  updated to take advantage of the new collation information.  The new
  collation information has increased the size of the compiled locale
  archive or binary locales.

* The GNU C Library can now be compiled with support for Intel CET, AKA
  Intel Control-flow Enforcement Technology.  When the library is built
  with --enable-cet, the resulting glibc is protected with indirect
  branch tracking (IBT) and shadow stack (SHSTK).  CET-enabled glibc is
  compatible with all existing executables and shared libraries.  This
  feature is currently supported on i386, x86_64 and x32 with GCC 8 and
  binutils 2.29 or later.  Note that CET-enabled glibc requires CPUs
  capable of multi-byte NOPs, like x86-64 processors as well as Intel
  Pentium Pro or newer.  NOTE: --enable-cet has been tested for i686,
  x86_64 and x32 on non-CET processors.  --enable-cet has been tested
  for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
  validated for i686.

* The GNU C Library now has correct support for ABSOLUTE symbols
  (SHN_ABS-relative symbols).  Previously such ABSOLUTE symbols were
  relocated incorrectly or in some cases discarded.  The GNU linker can
  make use of the newer semantics, but it must communicate it to the
  dynamic loader by setting the ELF file's identification (EI_ABIVERSION
  field) to indicate such support is required.

* Unicode 11.0.0 Support: Character encoding, character type info, and
  transliteration tables are all updated to Unicode 11.0.0, using
  generator scripts contributed by Mike FABIAN (Red Hat).

* <math.h> functions that round their results to a narrower type are added
  from TS 18661-1:2014 and TS 18661-3:2015:

  - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
    fMxaddfNx functions.

  - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
    fMxsubfNx functions.

  - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
    fMxmulfNx functions.

  - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
    fMxdivfNx functions.

* Two grammatical forms of month names are now supported for the following
  languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
  Scottish Gaelic, Upper Sorbian, and Walloon.  The following languages now
  support two grammatical forms in abbreviated month names: Catalan, Greek,
  and Kashubian.

* Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
  include the support for two grammatical forms of month names.

* Building and running on GNU/Hurd systems now works without out-of-tree
  patches.

* The renameat2 function has been added, a variant of the renameat function
  which has a flags argument.  If the flags are zero, the renameat2 function
  acts like renameat.  If the flag is not zero and there is no kernel
  support for renameat2, the function will fail with an errno value of
  EINVAL.  This is different from the existing gnulib function renameatu,
  which performs a plain rename operation in case of a RENAME_NOREPLACE
  flags and a non-existing destination (and therefore has a race condition
  that can clobber the destination inadvertently).

* The statx function has been added, a variant of the fstatat64
  function with an additional flags argument.  If there is no direct
  kernel support for statx, glibc provides basic stat support based on
  the fstatat64 function.

* IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
  library if installed.  libidn2 version 2.0.5 or later is recommended.  If
  libidn2 is not available, internationalized domain names are not encoded
  or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
  getnameinfo.  (getaddrinfo calls with non-ASCII names and AI_IDN will fail
  with an encoding error.)  Flags which used to change the IDN encoding and
  decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
  NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
  deprecated.  They no longer have any effect.

* Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
  DT_AUXILIARY, and DT_FILTER has been expanded to support the full
  range of ELF gABI expressions including such constructs as
  '$ORIGIN$ORIGIN' (if valid).  For SUID/GUID applications the rules
  have been further restricted, and where in the past a dynamic string
  token sequence may have been interpreted as a literal string it will
  now cause a load failure.  These load failures were always considered
  unspecified behaviour from the perspective of the dynamic loader, and
  for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
  results in a load failure now.

* Support for ISO C threads (ISO/IEC 9899:2011) has been added.  The
  implementation includes all the standard functions provided by
  <threads.h>:

  - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
    thrd_detach, thrd_exit, and thrd_join for thread management.

  - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
    mtx_destroy for mutual exclusion.

  - call_once for function call synchronization.

  - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
    cnd_wait for conditional variables.

  - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.

  Application developers must link against libpthread to use ISO C threads.

Deprecated and removed features, and other changes affecting compatibility:

* The nonstandard header files <libio.h> and <_G_config.h> are no longer
  installed.  Software that was using either header should be updated to
  use standard <stdio.h> interfaces instead.

* The stdio functions 'getc' and 'putc' are no longer defined as macros.
  This was never required by the C standard, and the macros just expanded
  to call alternative names for the same functions.  If you hoped getc and
  putc would provide performance improvements over fgetc and fputc, instead
  investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
  necessary, flockfile and funlockfile.

* All stdio functions now treat end-of-file as a sticky condition.  If you
  read from a file until EOF, and then the file is enlarged by another
  process, you must call clearerr or another function with the same effect
  (e.g. fseek, rewind) before you can read the additional data.  This
  corrects a longstanding C99 conformance bug.  It is most likely to affect
  programs that use stdio to read interactive input from a terminal.
  (Bug #1190.)

* The macros 'major', 'minor', and 'makedev' are now only available from
  the header <sys/sysmacros.h>; not from <sys/types.h> or various other
  headers that happen to include <sys/types.h>.  These macros are rarely
  used, not part of POSIX nor XSI, and their names frequently collide with
  user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
  further explanation.

  <sys/sysmacros.h> is a GNU extension.  Portable programs that require
  these macros should first include <sys/types.h>, and then include
  <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.

* The tilegx*-*-linux-gnu configurations are no longer supported.

* The obsolete function ustat is no longer available to newly linked
  binaries; the headers <ustat.h> and <sys/ustat.h> have been removed.  This
  function has been deprecated in favor of fstatfs and statfs.

* The obsolete function nfsservctl is no longer available to newly linked
  binaries.  This function was specific to systems using the Linux kernel
  and could not usefully be used with the GNU C Library on systems with
  version 3.1 or later of the Linux kernel.

* The obsolete function name llseek is no longer available to newly linked
  binaries.  This function was specific to systems using the Linux kernel
  and was not declared in a header.  Programs should use the lseek64 name
  for this function instead.

* The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
  getaddrinfo and getnameinfo functions have been deprecated.  The behavior
  previously selected by them is now always enabled.

* The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
  the getaddrinfo and getnameinfo functions have been deprecated.  The STD3
  restriction (rejecting '_' in host names, among other things) has been
  removed, for increased compatibility with non-IDN name resolution.

* The fcntl function now have a Long File Support variant named fcntl64.  It
  is added to fix some Linux Open File Description (OFD) locks usage on non
  LFS mode.  As for others *64 functions, fcntl64 semantics are analogous with
  fcntl and LFS support is handled transparently.  Also for Linux, the OFD
  locks act as a cancellation entrypoint.

* The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
  ecb_crypt, and des_setparity are no longer available to newly linked
  binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
  longer installed.  These functions encrypted and decrypted data with the
  DES block cipher, which is no longer considered secure.  Software that
  still uses these functions should switch to a modern cryptography library,
  such as libgcrypt.

* Reflecting the removal of the encrypt and setkey functions above, the
  macro _XOPEN_CRYPT is no longer defined.  As a consequence, the crypt
  function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
  enabled.

* The obsolete function fcrypt is no longer available to newly linked
  binaries.  It was just another name for the standard function crypt,
  and it has not appeared in any header file in many years.

* We have tentative plans to hand off maintenance of the passphrase-hashing
  library, libcrypt, to a separate development project that will, we hope,
  keep up better with new passphrase-hashing algorithms.  We will continue
  to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
  'crypt_r' should not need to change at all; however, distributions will
  need to install <crypt.h> and libcrypt from a separate project.

  In this release, if the configure option --disable-crypt is used, glibc
  will not install <crypt.h> or libcrypt, making room for the separate
  project's versions of these files.  The plan is to make this the default
  behavior in a future release.

Changes to build and runtime requirements:

  GNU make 4.0 or later is now required to build glibc.

Security related changes:

  CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
  been fixed by removing the glibc-internal IDNA implementation and using
  the system-provided libidn2 library instead.  Originally reported by Hanno
  Böck and Christian Weisgerber.

  CVE-2017-18269: An SSE2-based memmove implementation for the i386
  architecture could corrupt memory.  Reported by Max Horn.

  CVE-2018-11236: Very long pathname arguments to realpath function could
  result in an integer overflow and buffer overflow.  Reported by Alexey
  Izbyshev.

  CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
  architecture could write beyond the target buffer, resulting in a buffer
  overflow.  Reported by Andreas Schwab.

The following bugs are resolved with this release:

  [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
  [6889] manual: 'PWD' mentioned but not specified
  [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
    when __WORDSIZE != 64
  [13762] regex: re_search etc. should return -2 on memory exhaustion
  [13888] build: /tmp usage during testing
  [13932] math: dbl-64 pow unexpectedly slow for some inputs
  [14092] nptl: Support C11 threads
  [14095] localedata: Review / update collation data from Unicode / ISO
    14651
  [14508] libc: -Wformat warnings
  [14553] libc: Namespace pollution loff_t in sys/types.h
  [14890] libc: Make NT_PRFPREG canonical.
  [15105] libc: Extra PLT references with -Os
  [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
    conversion is given
  [16335] manual: Feature test macro documentation incomplete and out of
    date
  [16552] libc: Unify umount implementations in terms of umount2
  [17082] libc: htons et al.: statement-expressions prevent use on global
    scope with -O1 and higher
  [17343] libc: Signed integer overflow in /stdlib/random_r.c
  [17438] localedata: pt_BR: wrong d_fmt delimiter
  [17662] libc: please implement binding for the new renameat2 syscall
  [17721] libc: __restrict defined as /* Ignore */ even in c11
  [17979] libc: inconsistency between uchar.h and stdint.h
  [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
  [18023] libc: extend_alloca is broken (questionable pointer comparison,
    horrible machine code)
  [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
    last constant.
  [18471] libc: llseek should be a compat symbol
  [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
    symbols
  [18991] nss: nss_files skips large entry in database
  [19239] libc: Including stdlib.h ends up with macros major and minor being
    defined
  [19463] libc: linknamespace failures when compiled with -Os
  [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
  [19527] locale: Normalized charset name not recognized by setlocale
  [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
  [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
    fpscr.c'
  [19728] network: out of bounds stack read in libidn function
    idna_to_ascii_4i (CVE-2016-6261)
  [19729] network: out of bounds heap read on invalid utf-8 inputs in
    stringprep_utf8_nfkc_normalize (CVE-2016-6263)
  [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
    the base address
  [20079] libc: Add SHT_X86_64_UNWIND to elf.h
  [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
  [20419] dynamic-link: files with large allocated notes crash in
    open_verify
  [20530] libc: bswap_16 should use __builtin_bswap16() when available
  [20890] dynamic-link: ldconfig: fsync the files before atomic rename
  [20980] manual: CFLAGS environment variable replaces vital options
  [21163] regex: Assertion failure in pop_fail_stack when executing a
    malformed regexp (CVE-2015-8985)
  [21234] manual: use of CFLAGS makes glibc detect no optimization
  [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
  [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
  [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
  [21508] locale: intl/tst-gettext failure with latest msgfmt
  [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
  [21812] network: getifaddrs() returns entries with ifa_name == NULL
  [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
    dlopen
  [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
    AT_SECURE=1
  [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
  [22247] network: Integer overflow in the decode_digit function in
    puny_decode.c in libidn (CVE-2017-14062)
  [22342] nscd: NSCD not properly caching netgroup
  [22391] nptl: Signal function clear NPTL internal symbols inconsistently
  [22550] localedata: es_ES locale (and  other es_* locales):  collation
    should treat ñ  as a primary different character,  sync the collation
    for Spanish with CLDR
  [22638] dynamic-link: sparc: static binaries are broken if glibc is built
    by gcc configured with --enable-default-pie
  [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
  [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
    crossing 2GB threshold (CVE-2017-18269)
  [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
    es_BO
  [22735] time: Misleading typo in time.h source comment regarding
    CLOCKS_PER_SECOND
  [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
  [22761] libc: No trailing `%n' conversion specifier in FMT passed from
    `__assert_perror_fail ()' to `__assert_fail_base ()'
  [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
    dlopen failures
  [22786] libc: Stack buffer overflow in realpath() if input size is close
    to SSIZE_MAX (CVE-2018-11236)
  [22787] dynamic-link: _dl_check_caller returns false when libc is linked
    through an absolute DT_NEEDED path
  [22792] build: tcb-offsets.h dependency dropped
  [22797] libc: pkey_get() uses non-reserved name of argument
  [22807] libc: PTRACE_* constants missing for powerpc
  [22818] glob: posix/tst-glob_lstat_compat failure on alpha
  [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
  [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
  [22848] localedata: ca_ES: update date definitions from CLDR
  [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
  [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
  [22896] localedata: Update locale data for an_ES
  [22902] math: float128 test failures with GCC 8
  [22918] libc: multiple common of `__nss_shadow_database'
  [22919] libc: sparc32: backtrace yields infinite backtrace with
    makecontext
  [22926] libc: FTBFS on powerpcspe
  [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
    required
  [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
  [22947] libc: FAIL: misc/tst-preadvwritev2
  [22963] localedata: cs_CZ: Add alternative month names
  [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
  [22996] localedata: change LC_PAPER to en_US in es_BO locale
  [22998] dynamic-link: execstack tests are disabled when SELinux is
    disabled
  [23005] network: Crash in __res_context_send after memory allocation
    failure
  [23007] math: strtod cannot handle -nan
  [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
  [23036] regex: regex equivalence class regression
  [23037] libc: initialize msg_flags to zero for sendmmsg() calls
  [23069] libc: sigaction broken on riscv64-linux-gnu
  [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
  [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
    patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
  [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
    and libc build with -Os)
  [23140] localedata: More languages need two forms of month names
  [23145] libc: _init/_fini aren't marked as hidden
  [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
  [23171] math: C++ iseqsig for long double converts arguments to double
  [23178] nscd: sudo will fail when it is run in concurrent with commands
    that changes /etc/passwd
  [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
    (CVE-2018-11237)
  [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
  [23208] localedata: New locale - Lower Sorbian (dsb)
  [23233] regex: Memory leak in build_charclass_op function in file
    posix/regcomp.c
  [23236] stdio: Harden function pointers in _IO_str_fields
  [23250] nptl: Offset of __private_ss differs from GCC
  [23253] math: tgamma test suite failures on i686 with -march=x86-64
    -mtune=generic -mfpmath=sse
  [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
    AT_SECURE
  [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
  [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
    parser.c
  [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
  [23277] math: nan function should not have const attribute
  [23279] math: scanf and strtod wrong for some hex floating-point
  [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
    directed rounding
  [23290] localedata: IBM273 is not equivalent to ISO-8859-1
  [23303] build: undefined reference to symbol
    '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
  [23307] dynamic-link: Absolute symbols whose value is zero ignored in
    lookup
  [23313] stdio: libio vtables validation and standard file object
    interposition
  [23329] libc: The __libc_freeres infrastructure is not properly run across
    DSO boundaries.
  [23349] libc: Various glibc headers no longer compatible with
    <linux/time.h>
  [23351] malloc: Remove unused code related to heap dumps and malloc
    checking
  [23363] stdio: stdio-common/tst-printf.c has non-free license
  [23396] regex: Regex equivalence regression in single-byte locales
  [23422] localedata: oc_FR: More updates of locale data
  [23442] build: New warning with GCC 8
  [23448] libc: Out of bounds access in IBM-1390 converter
  [23456] libc: Wrong index_cpu_LZCNT
  [23458] build: tst-get-cpu-features-static isn't added to tests
  [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
    processors
  [23467] dynamic-link: x86/CET: A property note parser bug


Version 2.27

Major new features:

* The GNU C Library can now be compiled with support for building static
  PIE executables (See --enable-static-pie in INSTALL).  These static PIE
  executables are like static executables but can be loaded at any address
  and provide additional security hardening benefits at the cost of some
  memory and performance.  When the library is built with --enable-static-pie
  the resulting libc.a is usable with GCC 8 and above to create static PIE
  executables using the GCC option '-static-pie'.  This feature is currently
  supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
  aarch64 with binutils 2.30 or later.

* Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
  sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
  H.J. Lu from Intel.

* Optimized x86-64 trunc and truncf for processors with SSE4.1.

* Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.

* In order to support faster and safer process termination the malloc API
  family of functions will no longer print a failure address and stack
  backtrace after detecting heap corruption.  The goal is to minimize the
  amount of work done after corruption is detected and to avoid potential
  security issues in continued process execution.  Reducing shutdown time
  leads to lower overall process restart latency, so there is benefit both
  from a security and performance perspective.

* The abort function terminates the process immediately, without flushing
  stdio streams.  Previous glibc versions used to flush streams, resulting
  in deadlocks and further data corruption.  This change also affects
  process aborts as the result of assertion failures.

* On platforms where long double has the IEEE binary128 format (aarch64,
  alpha, mips64, riscv, s390 and sparc), the math library now implements
  _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
  These are the same interfaces added in version 2.26 for some platforms where
  this format is supported but is not the format of long double.

* On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
  mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
  implements interfaces for that type, as defined by ISO/IEC TS
  18661-3:2015.  These are corresponding interfaces to those supported for
  _Float128.

* The math library now implements interfaces for the _Float32, _Float64 and
  _Float32x types, as defined by ISO/IEC TS 18661-3:2015.  These are
  corresponding interfaces to those supported for _Float128.

* glibc now implements the memfd_create and mlock2 functions on Linux.

* Support for memory protection keys was added.  The <sys/mman.h> header now
  declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
  pkey_get.

* The copy_file_range function was added.

* Optimized memcpy, mempcpy, memmove, and memset for sparc M7.

* The ldconfig utility now processes `include' directives using the C/POSIX
  collation ordering.  Previous glibc versions used locale-specific
  ordering, the change might break systems that relied on that.

* Support for two grammatical forms of month names has been added.
  In a call to strftime, the "%B" and "%b" format specifiers will now
  produce the grammatical form required when the month is used as part
  of a complete date.  New "%OB" and "%Ob" specifiers produce the form
  required when the month is named by itself.  For instance, in Greek
  and in many Slavic and Baltic languages, "%B" will produce the month
  in genitive case, and "%OB" will produce the month in nominative case.

  In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
  are all valid and will all accept any known form of month
  name---standalone or complete, abbreviated or full.  In a call to
  nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
  the strings used by "%B" and "%b", respectively.  New query
  constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
  used by "%OB" and "%Ob", respectively.

  In a locale definition file, use "alt_mon" and "ab_alt_mon" to
  define the strings for %OB and %Ob, respectively; these have the
  same syntax as "mon" and "abmon".  These arrays are optional; if they
  are not provided then they have the same content as "mon" and "abmon",
  respectively.

  These features are provided for locales which define "alt_mon" and/or
  "ab_alt_mon" in their locale source data.  This release includes such
  alternative month name data for the following languages: Belarusian,
  Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.

  This feature is currently a GNU extension, but it is expected to
  be added to the next revision of POSIX, and it is also already
  available on some BSD-derived operating systems.

  This feature will cause existing statically compiled applications
  to fail to load locales and fall back to the builtin C/POSIX locales.
  See notes below for other changes affecting compatibility.

* Support for the RISC-V ISA running on Linux has been added.  This port
  requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
  for the following ISA and ABI pairs:

    - rv64imac lp64
    - rv64imafdc lp64
    - rv64imafdc lp64d

Deprecated and removed features, and other changes affecting compatibility:

* Statically compiled applications attempting to load locales compiled for the
  GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
  locale.  The reason for this is that the addition of the new "%OB" and "%Ob",
  support for two grammatical forms of the month names, also extends the locale
  data binary format.  Static applications needing locale support must be
  recompiled to match the runtime and data they are deployed with. In some
  distributions there is an upgrade window where dynamically linked applications
  may use a new library but the old locale data and also fall back to the
  builtin C/POSIX locales; restarting the application process is sufficient to
  fix this.

* Support for statically linked applications which call dlopen is deprecated
  and will be removed in a future version of glibc.  Applications which call
  dlopen need to be linked dynamically instead.

* Support for old programs which use internal stdio data structures and
  functions is deprecated.  This includes programs which use the C++ streams
  provided by libstdc++ in GCC 2.95.  Programs which use the internal
  symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
  _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
  _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
  _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
  _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
  _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
  _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
  _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
  _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
  _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
  _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
  _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
  _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
  _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
  _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
  _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
  _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
  _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
  _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
  _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
  _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
  future version of glibc.  Unlike other symbol removals, these old
  applications will not be supported using compatibility symbols.

* On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
  defined by <sys/ptrace.h>.

* libm no longer supports SVID error handling (calling a user-provided
  matherr function on error) or the _LIB_VERSION variable to control error
  handling.  (SVID error handling and the _LIB_VERSION variable still work
  for binaries linked against older versions of the GNU C Library.)  The
  libieee.a library is no longer provided.  math.h no longer defines struct
  exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
  TLOSS, PLOSS and HUGE.

* The libm functions pow10, pow10f and pow10l are no longer supported for
  new programs.  Programs should use the standard names exp10, exp10f and
  exp10l for these functions instead.

* The mcontext_t type is no longer the same as struct sigcontext.  On
  platforms where it was previously the same, this changes the C++ name
  mangling for interfaces involving this type.

* The add-ons mechanism for building additional packages at the same time as
  glibc has been removed.  The --enable-add-ons configure option is now
  ignored.

* The --without-fp configure option is now ignored.  Whether hardware
  floating-point instructions are used is now configured based on whether
  the compiler used at configure time (without any options implied by a
  --with-cpu= configure option) uses such instructions.

* The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
  the specified string can be parsed as a domain name.

* In the malloc_info output, the <heap> element may contain another <aspace>
  element, "subheaps", which contains the number of sub-heaps.

* The libresolv function p_secstodate is no longer supported for new
  programs.

* The tilepro-*-linux-gnu configuration is no longer supported.

* The nonstandard header files <libio.h> and <_G_config.h> are deprecated
  and will be removed in a future release.  Software that is still using
  either header should be updated to use standard <stdio.h> interfaces
  instead.

  libio.h was originally the header for a set of supported GNU extensions,
  but they have not been maintained as such in many years, they are now
  standing in the way of improvements to stdio, and we don't think there are
  any remaining external users.  _G_config.h was never intended for public
  use, but predates the bits convention.

Changes to build and runtime requirements:

* bison version 2.7 or later is required to generate code in the 'intl'
  subdirectory.

Security related changes:

  CVE-2009-5064: The ldd script would sometimes run the program under
  examination directly, without preventing code execution through the
  dynamic linker.  (The glibc project disputes that this is a security
  vulnerability; only trusted binaries must be examined using the ldd
  script.)

  CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
  suffered from a one-byte overflow during ~ operator processing (either
  on the stack or the heap, depending on the length of the user name).
  Reported by Tim Rühsen.

  CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
  would sometimes fail to free memory allocated during ~ operator
  processing, leading to a memory leak and, potentially, to a denial
  of service.

  CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
  without GLOB_NOESCAPE, could write past the end of a buffer while
  unescaping user names.  Reported by Tim Rühsen.

  CVE-2017-17426: The malloc function, when called with an object size near
  the value SIZE_MAX, would return a pointer to a buffer which is too small,
  instead of NULL.  This was a regression introduced with the new malloc
  thread cache in glibc 2.26.  Reported by Iain Buclaw.

  CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
  to the allocation of too much memory.  (This is not a security bug per se,
  it is mentioned here only because of the CVE assignment.)  Reported by
  Qualys.

  CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
  of the number of search path components.  (This is not a security
  vulnerability per se because no trust boundary is crossed if the fix for
  CVE-2017-1000366 has been applied, but it is mentioned here only because
  of the CVE assignment.)  Reported by Qualys.

  CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
  for AT_SECURE or SUID binaries could be used to load libraries from the
  current directory.

  CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
  succeeds without returning an absolute path due to unexpected behaviour
  of the Linux kernel getcwd syscall.  Reported by halfdog.

  CVE-2018-6485: The posix_memalign and memalign functions, when called with
  an object size near the value of SIZE_MAX, would return a pointer to a
  buffer which is too small, instead of NULL.  Reported by Jakub Wilk.

  CVE-2018-6551: The malloc function, when called with an object size near
  the value of SIZE_MAX, would return a pointer to a buffer which is too
  small, instead of NULL.

The following bugs are resolved with this release:

  [866] glob: glob should match dangling symlinks
  [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
  [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
    locale
  [5997] math: Very slow execution of sinf function
  [10580] localedata: hr_HR: updated locale
  [10871] locale: 'mon' array should contain both nominative and genitive
    cases
  [12349] localedata: eu_ES: incorrect thousands separator
  [13605] localedata: shn_MM: new Shan locale
  [13805] localedata: ru_RU: currency should use ',' as radix point
  [13953] localedata: km_KH: locale update
  [13994] localedata: mjw_IN: new locale
  [14121] build: make writes .mo files in po directory
  [14333] libc: Fix the race between atexit() and exit()
  [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
  [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
    "Bangla"
  [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
  [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
    width Latin characters
  [15332] localedata: es_CU: locale update
  [15436] stdio: Don't close or flush stdio streams on abort
  [15537] localedata: lv_LV: invalid collation for Latvian diacritical
    letters
  [16148] localedata: ca_ES: incorrect thousands separator
  [16750] dynamic-link: ldd should not try to execute the binaries
    (CVE-2009-5064)
  [16777] localedata: pl_PL: incorrect thousands separator in locale
  [16905] localedata: hanzi: new collation
  [17563] localedata: cmn_TW: add hanzi collation
  [17750] localedata: wrong collation order of diacritics in most locales
  [17804] libc: scandirat fails with ENOMEM because it checks for errno even
    if malloc succeeded
  [17956] build: Build fails on missing definitions from header file
    nss/nss.h when Mozilla NSS is used for cryptography
  [18203] libc: realpath() does not handle unreachable paths correctly
  [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
  [18812] localedata: kab_DZ: new Kabyle Algeria locale
  [18822] libc: Internal functions are called via PLT
  [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
  [19170] libc: __gmon_start__ defined in hppa in crtn.S
  [19574] libc: glibc should support building static PIE binaries
  [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
    U+309A
  [19971] glob: glob: Do not skip entries with zero d_ino values
  [19982] localedata: fr.po: spelling mistake for error code EXDEV
  [20008] localedata: km_KH: convert to translit_neutral
  [20009] localedata: tr_TR: convert LC_CTYPE to i18n
  [20142] math: [x86_64] Add SSE4.1 trunc, truncf
  [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
  [20482] localedata: de_CH: abbreviated weekdays should be two letters
  [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
    for Nicaragua
  [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
    they're set, wrong errors returned by gaih_inet when lookup functions
    are not found.
  [20756] localedata: [PATCH] Use Unicode wise thousands separator
  [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
    access
  [20952] localedata: yuw_PG: new locale
  [21084] localedata: charmaps/IBM858: new codepage
  [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
  [21242] libc: assert gives pedantic warning in old gcc versions
  [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
    __regcall calling convention
  [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
  [21326] libc: C99 functions are not declared for C++11 and later if
    _GNU_SOURCE is not predefined by g++
  [21457] libc: sys/ucontext.h namespace
  [21530] libc: tmpfile() should be implemented using O_TMPFILE
  [21660] math: GCC fails to compile a formula with tgmath.h
  [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
    SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
    (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
  [21684] math: tgmath.h handling of complex integers
  [21685] math: tgmath.h handling of bit-fields
  [21686] math: tgmath.h handling of __int128
  [21706] localedata: yesstr and nostr  are missing for Breton [LC_MESSAGES]
    locale
  [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
    protector=all
  [21750] localedata: column width of characters incompatible with classical
    wcwidth
  [21754] malloc: malloc: Perform as little work as possible after heap
    consistency check failures
  [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
  [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
  [21791] string: Unused XXX_chk_XXX functions in libc.a
  [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
    PIE
  [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
    locales
  [21845] localedata: Added new Locale bho_NP
  [21853] localedata: Fix abday Which looks same as day in zh_SG
  [21854] localedata: Added New Locale en_SC
  [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
  [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
    _dl_runtime_resolve_avx_slow
  [21885] network: getaddrinfo: gethosts does not release resolver context
    on memory allocation failure
  [21899] libc: XPG4.2 sigaction namespace
  [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
    the suspect)
  [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
    default (i386)
  [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
    errno value, causing getaddrinfo to fail
  [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
  [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
    instead of EAI_NODATA
  [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
    constant PTRACE_SEIZE_DEVEL
  [21930] math: C-only gcc builtins used in <math.h> isinf
  [21932] network: Unpaired __resolv_context_get in generic get*_r
    implementation
  [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
  [21944] libc: sigval namespace
  [21951] localedata: Update hanzi collation by stroke
  [21955] math: Wrong alignment of  L(SP_RANGE)/L(SP_INF_0) in
    sysdeps/x86_64/fpu/e_expf.S
  [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
    allocation in syscall loops)
  [21959] localedata: Fix Country name for xh_ZA
  [21960] localedata: Fix abmon for bem_ZM
  [21966] math: AVX2 mathvec functions use FMA without checking
  [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
  [21971] localedata: Added New Locale for mfe_MU
  [21972] libc: assert macro requires operator== (int) for its argument type
  [21973] math: [sparc] libm missing sqrtl compat symbol
  [21974] libc: Remove __bb_init_func and __bb_exit_func
  [21982] string: stratcliff.c: error: assuming signed overflow does not
    occur with -O3
  [21986] stdio: __guess_grouping is called incorrectly
  [21987] math: [sparc32] wrong bits/long-double.h installed
  [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
    amounts)
  [22022] localedata: Missing country_name for mni_IN
  [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
    niu_NZ
  [22025] locale: iconv: Inconsistency between pointer mangling and NULL
    checks
  [22026] locale: iconv_open: heap overflow on gconv_init failure
  [22028] math: bits/math-finite.h _MSUF_ expansion namespace
  [22035] math: [m68k] bits/math-inline.h macro namespace
  [22038] localedata: Fix abbreviated weeks and months for Somali
  [22044] localedata: Remove redundant data for Limburgish Language
  [22050] malloc: Linking with -lmcheck does not hook
    __malloc_initialize_hook correctly
  [22051] libc: zero terminator in the middle of glibc's .eh_frame
  [22052] malloc: malloc failed to compile with GCC 7 and -O3
  [22070] localedata: charmaps/UTF-8: wcwidth for
    Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
  [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
    Jungseong and Jongseong) should be 0
  [22078] nss: nss_files performance issue in multi mode
  [22082] math: bits/math-finite.h exp10 condition
  [22086] libc: pcprofiledump incorrect cross-endian condition
  [22093] dynamic-link: ld.so no longer searches in .../x86_64
  [22095] network: Name server address allocation memory leak in resolv.conf
    parsing after OOM
  [22096] network: __resolv_conf_attach can incorrectly free passed conf
    object
  [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
  [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
    e.g. ET_GNU_DEBUG_*
  [22111] malloc: malloc: per thread cache is not returned when thread exits
  [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
  [22134] libc: [linux] implement fexecve with execveat
  [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
    ppc64le
  [22145] libc: ttyname() gives up too early in the face of namespaces
  [22146] math: C++ build issue with float128 on x86_64
  [22153] nptl: nptl: save error code before process termination
  [22156] libc: [hppa,ia64,microblaze] Executable stack default
  [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
  [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
  [22165] libc: [hppa] Text relocations in libc.so
  [22180] libc: destructor registered via __cxa_atexit is called twice
  [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
    symlinks") cause "make" segfaults
  [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
    math_force_eval
  [22207] libc: FAIL: stdlib/test-atexit-race
  [22225] math: nearbyint arithmetic moved before feholdexcept
  [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
  [22235] math: iscanonical in C++ and float128
  [22243] math: log2(0) and log10(0) are wrong in downward rounding without
    the svid compat wrapper
  [22244] math: ynf and yn are wrong without the svid compat wrapper
  [22273] libc: Improper assert in Linux posix_spawn implementation
  [22284] libc: -pg -pie doesn't work
  [22292] locale: localedef exits with error 4 when it should be error 1
  [22294] locale: Allow "" for int_currency_symbol definition in locales.
  [22295] locale: Don't warn on non-symbolic characters in locale sources in
    --verbose.
  [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
  [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
    to 2.26
  [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
  [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
  [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
  [22322] libc: [mips64] wrong bits/long-double.h installed
  [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
  [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
    (CVE-2017-15804)
  [22336] localedata: cs_CZ LC_COLLATE does not use i18n
  [22343] malloc: Integer overflow in posix_memalign
  [22347] libc: getrandom() returns the number of bytes that were copied  to
    the buffer even though the comments say "Return 0 on success and -1 on
    failure."
  [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
  [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
    -m32
  [22370] dynamic-link: Incorrect note padding check
  [22375] libc: malloc returns pointer from tcache_get when should return
    NULL (CVE-2017-17426)
  [22377] math: iseqsig, float128 and C++
  [22382] localedata: Error in tpi_PG locale
  [22387] localedata: Replace unicode sequences <Uxxxx> for characters
    inside the ASCII printable range
  [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
    -mlong-double-64
  [22403] localedata: Slash needs escaping in some locales
  [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
  [22409] network: res_hnok does not accept some host names used on the
    Internet
  [22412] network: res_dnok, res_hnok should perform syntax checks
  [22413] network: ns_name_pton ignores syntactically invalid trailing
    backslash
  [22415] stdio: setvbuf can lead to invalid free/segfault
  [22432] build: Non-deterministic build
  [22439] malloc: malloc_info should compute summary statistics for all sub-
    heaps in an arena
  [22442] network: if_nametoindex could report index for the wrong
    networking interface
  [22446] build: aliasing violation calling readlink in handle_request
  [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
  [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
  [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
    __nscd_hash/__nss_hash
  [22463] network: p_secstodate overflow handling
  [22469] localedata: pl_PL LC_COLLATE does not use i18n
  [22478] libc: sigwait can fail with EINTR
  [22505] libc: ldconfig processes include directive in locale-specific
    order
  [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
  [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
  [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
  [22524] localedata: lt_LT  LC_COLLATE does not use copy "iso14651_t1"
  [22527] localedata: tr_TR  LC_COLLATE does not use copy "iso14651_t1"
  [22534] localedata: Collation rules for Serbian and Bosnian should be the
    same as for Croatian
  [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
  [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
  [22577] libc: missing newline after "cannot allocate TLS data structures
    for initial thread"
  [22588] manual: manual/conf.texi: missing underscore in front of
    SC_SSIZE_MAX
  [22593] math: nextafter and nexttoward are declared with const attribute
  [22596] manual: manual: finite(nan) wrongly described as returning nonzero
  [22603] string: ia64 memchr overflows internal pointer check
  [22605] libc: SH clone does not set the exit code correctly
  [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
    (CVE-2017-1000408)
  [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
  [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
    modified in case of success
  [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
  [22615] manual: manual: ambiguous wording about errno value in case of
    success
  [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
    stack-protector=all
  [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
    binaries or if /proc is not mounted (CVE-2017-16997)
  [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
  [22630] build: $(no-pie-ldflag) is no longer effective
  [22631] math: [m68k] Bad const attributes in bits/mathinline.h
  [22635] nptl: pthread_self returns NULL before libpthread is loaded
  [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
  [22637] nptl: guard size is subtracted from thread stack size instead of
    adding it on top
  [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
  [22657] localedata: hu_HU: Avoid double space in date
  [22660] math: fmax, fmin sNaN handling on alpha
  [22664] libc: New warning of GCC8
  [22665] math: alpha: ceil and floor raise inexact exceptions
  [22666] math: alpha: trunc raise inexact exceptions
  [22667] libc: makecontext lacks stack alignment on i386
  [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
  [22679] libc: getcwd(3) can succeed without returning an absolute path
    (CVE-2018-1000001)
  [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
    elision and tunables
  [22687] math: [powerpc-nofpu] complex long double functions spurious
    "invalid" exception
  [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
  [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
  [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
    exception
  [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
  [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
    power4
  [22701] nis: Incomplete removal of libnsl
  [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
  [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
  [22715] dynamic-link: FAIL: elf/tst-audit10
  [22719] libc: Backtrace tests fail on hppa
  [22742] libc: [aarch64] mcontext_t __reserved field got renamed
  [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
  [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
