binutils-gdb/gdb/gnulib/import/m4/mmap-anon.m4
Sergio Durigan Junior 5e8754f90a Revert "Update gnulib to current upstream master"
This reverts commit 7a6dbc2fdb ("Update
gnulib to current upstream master").  It is needed because the gnulib
update caused problems with people using old GCC compilers (version
4.8, for example), which support C99 but don't default to using it.
Unfortunately this broke GDB for these users.  A more detailed report
of what happened can be found at:

  https://lists.gnu.org/archive/html/bug-gnulib/2018-08/msg00157.html

The reason for updating our gnulib copy was to fix PR gdb/23558.
Reverting this patch reintroduces the bug, so in order to fix it I
will submit a subsequent patch which cherry-picks the fix from gnulib.

gdb/ChangeLog:
2018-09-10  Sergio Durigan Junior  <sergiodj@redhat.com>

	Revert:
	2018-08-29  Sergio Durigan Junior  <sergiodj@redhat.com>

	PR gdb/23555
	PR gdb/23558
	* gnulib/aclocal.m4: Regenerate.
	* gnulib/config.in: Regenerate.
	* gnulib/configure: Regenerate.
	* gnulib/import/Makefile.am: Update.
	* gnulib/import/Makefile.in: Update.
	* gnulib/import/extra/snippet/_Noreturn.h: Rename to...
	* gnulib/import/_Noreturn.h: ... this.
	* gnulib/import/alloca.in.h: Update.
	* gnulib/import/extra/snippet/arg-nonnull.h: Rename to...
	* gnulib/import/arg-nonnull.h: ... this.
	* gnulib/import/assure.h: Update.
	* gnulib/import/at-func.c: Update.
	* gnulib/import/basename-lgpl.c: Update.
	* gnulib/import/extra/snippet/c++defs.h: Rename to...
	* gnulib/import/c++defs.h: ... this.
	* gnulib/import/canonicalize-lgpl.c: Update.
	* gnulib/import/cdefs.h: Update.
	* gnulib/import/chdir-long.c: Update.
	* gnulib/import/chdir-long.h: Update.
	* gnulib/import/cloexec.c: Update.
	* gnulib/import/cloexec.h: Update.
	* gnulib/import/close.c: Update.
	* gnulib/import/closedir.c: Update.
	* gnulib/import/config.charset: Update.
	* gnulib/import/dirent-private.h: Update.
	* gnulib/import/dirent.in.h: Update.
	* gnulib/import/dirfd.c: Update.
	* gnulib/import/dirname-lgpl.c: Update.
	* gnulib/import/dirname.h: Update.
	* gnulib/import/dosname.h: Update.
	* gnulib/import/dup-safer-flag.c: Update.
	* gnulib/import/dup-safer.c: Update.
	* gnulib/import/dup.c: Update.
	* gnulib/import/dup2.c: Update.
	* gnulib/import/errno.in.h: Update.
	* gnulib/import/error.c: Update.
	* gnulib/import/error.h: Update.
	* gnulib/import/exitfail.c: Update.
	* gnulib/import/exitfail.h: Update.
	* gnulib/import/extra/update-copyright: Update.
	* gnulib/import/fchdir.c: Update.
	* gnulib/import/fcntl.c: Update.
	* gnulib/import/fcntl.in.h: Update.
	* gnulib/import/fd-hook.c: Update.
	* gnulib/import/fd-hook.h: Update.
	* gnulib/import/fd-safer-flag.c: Update.
	* gnulib/import/fd-safer.c: Update.
	* gnulib/import/fdopendir.c: Update.
	* gnulib/import/filename.h: Update.
	* gnulib/import/filenamecat-lgpl.c: Update.
	* gnulib/import/filenamecat.h: Update.
	* gnulib/import/flexmember.h: Update.
	* gnulib/import/float+.h: Update.
	* gnulib/import/float.c: Update.
	* gnulib/import/float.in.h: Update.
	* gnulib/import/fnmatch.c: Update.
	* gnulib/import/fnmatch.in.h: Update.
	* gnulib/import/fnmatch_loop.c: Update.
	* gnulib/import/fpucw.h: Update.
	* gnulib/import/frexp.c: Update.
	* gnulib/import/frexpl.c: Update.
	* gnulib/import/fstat.c: Update.
	* gnulib/import/fstatat.c: Update.
	* gnulib/import/getcwd-lgpl.c: Update.
	* gnulib/import/getcwd.c: Update.
	* gnulib/import/getdtablesize.c: Update.
	* gnulib/import/getlogin_r.c: Update.
	* gnulib/import/getprogname.c: Update.
	* gnulib/import/getprogname.h: Update.
	* gnulib/import/gettext.h: Update.
	* gnulib/import/gettimeofday.c: Update.
	* gnulib/import/glob-libc.h: Update.
	* gnulib/import/glob.c: Update.
	* gnulib/import/glob.in.h: Update.
	* gnulib/import/glob_internal.h: Update.
	* gnulib/import/glob_pattern_p.c: Update.
	* gnulib/import/globfree.c: Update.
	* gnulib/import/hard-locale.c: Update.
	* gnulib/import/hard-locale.h: Update.
	* gnulib/import/intprops.h: Update.
	* gnulib/import/inttypes.in.h: Update.
	* gnulib/import/isnan.c: Update.
	* gnulib/import/isnand-nolibm.h: Update.
	* gnulib/import/isnand.c: Update.
	* gnulib/import/isnanl-nolibm.h: Update.
	* gnulib/import/isnanl.c: Update.
	* gnulib/import/itold.c: Update.
	* gnulib/import/libc-config.h: Update.
	* gnulib/import/limits.in.h: Update.
	* gnulib/import/localcharset.c: Update.
	* gnulib/import/localcharset.h: Update.
	* gnulib/import/localtime-buffer.c: Update.
	* gnulib/import/localtime-buffer.h: Update.
	* gnulib/import/lstat.c: Update.
	* gnulib/import/m4/00gnulib.m4: Update.
	* gnulib/import/m4/__inline.m4: Update.
	* gnulib/import/m4/absolute-header.m4: Update.
	* gnulib/import/m4/alloca.m4: Update.
	* gnulib/import/m4/builtin-expect.m4: Update.
	* gnulib/import/m4/canonicalize.m4: Update.
	* gnulib/import/m4/chdir-long.m4: Update.
	* gnulib/import/m4/close.m4: Update.
	* gnulib/import/m4/closedir.m4: Update.
	* gnulib/import/m4/configmake.m4: Update.
	* gnulib/import/m4/d-ino.m4: Update.
	* gnulib/import/m4/d-type.m4: Update.
	* gnulib/import/m4/dirent_h.m4: Update.
	* gnulib/import/m4/dirfd.m4: Update.
	* gnulib/import/m4/dirname.m4: Update.
	* gnulib/import/m4/double-slash-root.m4: Update.
	* gnulib/import/m4/dup.m4: Update.
	* gnulib/import/m4/dup2.m4: Update.
	* gnulib/import/m4/eealloc.m4: Update.
	* gnulib/import/m4/environ.m4: Update.
	* gnulib/import/m4/errno_h.m4: Update.
	* gnulib/import/m4/error.m4: Update.
	* gnulib/import/m4/exponentd.m4: Update.
	* gnulib/import/m4/exponentl.m4: Update.
	* gnulib/import/m4/extensions.m4: Update.
	* gnulib/import/m4/extern-inline.m4: Update.
	* gnulib/import/m4/fchdir.m4: Update.
	* gnulib/import/m4/fcntl-o.m4: Update.
	* gnulib/import/m4/fcntl.m4: Update.
	* gnulib/import/m4/fcntl_h.m4: Update.
	* gnulib/import/m4/fdopendir.m4: Update.
	* gnulib/import/m4/filenamecat.m4: Update.
	* gnulib/import/m4/flexmember.m4: Update.
	* gnulib/import/m4/float_h.m4: Update.
	* gnulib/import/m4/fnmatch.m4: Update.
	* gnulib/import/m4/fnmatch_h.m4: Update.
	* gnulib/import/m4/fpieee.m4: Update.
	* gnulib/import/m4/frexp.m4: Update.
	* gnulib/import/m4/frexpl.m4: Update.
	* gnulib/import/m4/fstat.m4: Update.
	* gnulib/import/m4/fstatat.m4: Update.
	* gnulib/import/m4/getcwd-abort-bug.m4: Update.
	* gnulib/import/m4/getcwd-path-max.m4: Update.
	* gnulib/import/m4/getcwd.m4: Update.
	* gnulib/import/m4/getdtablesize.m4: Update.
	* gnulib/import/m4/getlogin.m4: Update.
	* gnulib/import/m4/getlogin_r.m4: Update.
	* gnulib/import/m4/getpagesize.m4: Update.
	* gnulib/import/m4/getprogname.m4: Update.
	* gnulib/import/m4/gettimeofday.m4: Update.
	* gnulib/import/m4/glibc21.m4: Update.
	* gnulib/import/m4/glob.m4: Update.
	* gnulib/import/m4/glob_h.m4: Update.
	* gnulib/import/m4/gnulib-cache.m4: Update.
	* gnulib/import/m4/gnulib-common.m4: Update.
	* gnulib/import/m4/gnulib-comp.m4: Update.
	* gnulib/import/m4/gnulib-tool.m4: Update.
	* gnulib/import/m4/hard-locale.m4: Update.
	* gnulib/import/m4/include_next.m4: Update.
	* gnulib/import/m4/inttypes-pri.m4: Update.
	* gnulib/import/m4/inttypes.m4: Update.
	* gnulib/import/m4/isnand.m4: Update.
	* gnulib/import/m4/isnanl.m4: Update.
	* gnulib/import/m4/largefile.m4: Update.
	* gnulib/import/m4/limits-h.m4: Update.
	* gnulib/import/m4/localcharset.m4: Update.
	* gnulib/import/m4/locale-fr.m4: Update.
	* gnulib/import/m4/locale-ja.m4: Update.
	* gnulib/import/m4/locale-zh.m4: Update.
	* gnulib/import/m4/localtime-buffer.m4: Update.
	* gnulib/import/m4/longlong.m4: Update.
	* gnulib/import/m4/lstat.m4: Update.
	* gnulib/import/m4/malloc.m4: Update.
	* gnulib/import/m4/malloca.m4: Update.
	* gnulib/import/m4/math_h.m4: Update.
	* gnulib/import/m4/mbrtowc.m4: Update.
	* gnulib/import/m4/mbsinit.m4: Update.
	* gnulib/import/m4/mbsrtowcs.m4: Update.
	* gnulib/import/m4/mbstate_t.m4: Update.
	* gnulib/import/m4/memchr.m4: Update.
	* gnulib/import/m4/memmem.m4: Update.
	* gnulib/import/m4/mempcpy.m4: Update.
	* gnulib/import/m4/memrchr.m4: Update.
	* gnulib/import/m4/mkdir.m4: Update.
	* gnulib/import/m4/mkstemp.m4: Update.
	* gnulib/import/m4/mmap-anon.m4: Update.
	* gnulib/import/m4/mode_t.m4: Update.
	* gnulib/import/m4/msvc-inval.m4: Update.
	* gnulib/import/m4/msvc-nothrow.m4: Update.
	* gnulib/import/m4/multiarch.m4: Update.
	* gnulib/import/m4/nocrash.m4: Update.
	* gnulib/import/m4/off_t.m4: Update.
	* gnulib/import/m4/onceonly.m4: Update.
	* gnulib/import/m4/open-cloexec.m4: Update.
	* gnulib/import/m4/open.m4: Update.
	* gnulib/import/m4/openat.m4: Update.
	* gnulib/import/m4/opendir.m4: Update.
	* gnulib/import/m4/pathmax.m4: Update.
	* gnulib/import/m4/rawmemchr.m4: Update.
	* gnulib/import/m4/readdir.m4: Update.
	* gnulib/import/m4/readlink.m4: Update.
	* gnulib/import/m4/realloc.m4: Update.
	* gnulib/import/m4/rename.m4: Update.
	* gnulib/import/m4/rewinddir.m4: Update.
	* gnulib/import/m4/rmdir.m4: Update.
	* gnulib/import/m4/save-cwd.m4: Update.
	* gnulib/import/m4/secure_getenv.m4: Update.
	* gnulib/import/m4/setenv.m4: Update.
	* gnulib/import/m4/signal_h.m4: Update.
	* gnulib/import/m4/ssize_t.m4: Update.
	* gnulib/import/m4/stat-time.m4: Update.
	* gnulib/import/m4/stat.m4: Update.
	* gnulib/import/m4/std-gnu11.m4: Update.
	* gnulib/import/m4/stdbool.m4: Update.
	* gnulib/import/m4/stddef_h.m4: Update.
	* gnulib/import/m4/stdint.m4: Update.
	* gnulib/import/m4/stdio_h.m4: Update.
	* gnulib/import/m4/stdlib_h.m4: Update.
	* gnulib/import/m4/strchrnul.m4: Update.
	* gnulib/import/m4/strdup.m4: Update.
	* gnulib/import/m4/strerror.m4: Update.
	* gnulib/import/m4/string_h.m4: Update.
	* gnulib/import/m4/strstr.m4: Update.
	* gnulib/import/m4/strtok_r.m4: Update.
	* gnulib/import/m4/sys_socket_h.m4: Update.
	* gnulib/import/m4/sys_stat_h.m4: Update.
	* gnulib/import/m4/sys_time_h.m4: Update.
	* gnulib/import/m4/sys_types_h.m4: Update.
	* gnulib/import/m4/tempname.m4: Update.
	* gnulib/import/m4/time_h.m4: Update.
	* gnulib/import/m4/unistd-safer.m4: Update.
	* gnulib/import/m4/unistd_h.m4: Update.
	* gnulib/import/m4/warn-on-use.m4: Update.
	* gnulib/import/m4/wchar_h.m4: Update.
	* gnulib/import/m4/wchar_t.m4: Update.
	* gnulib/import/m4/wctype_h.m4: Update.
	* gnulib/import/m4/wint_t.m4: Update.
	* gnulib/import/malloc.c: Update.
	* gnulib/import/malloc/scratch_buffer.h: Update.
	* gnulib/import/malloc/scratch_buffer_grow.c: Update.
	* gnulib/import/malloc/scratch_buffer_grow_preserve.c: Update.
	* gnulib/import/malloc/scratch_buffer_set_array_size.c: Update.
	* gnulib/import/malloca.c: Update.
	* gnulib/import/malloca.h: Update.
	* gnulib/import/malloca.valgrind: Update.
	* gnulib/import/math.in.h: Update.
	* gnulib/import/mbrtowc.c: Update.
	* gnulib/import/mbsinit.c: Update.
	* gnulib/import/mbsrtowcs-impl.h: Update.
	* gnulib/import/mbsrtowcs-state.c: Update.
	* gnulib/import/mbsrtowcs.c: Update.
	* gnulib/import/memchr.c: Update.
	* gnulib/import/memmem.c: Update.
	* gnulib/import/mempcpy.c: Update.
	* gnulib/import/memrchr.c: Update.
	* gnulib/import/mkdir.c: Update.
	* gnulib/import/mkstemp.c: Update.
	* gnulib/import/msvc-inval.c: Update.
	* gnulib/import/msvc-inval.h: Update.
	* gnulib/import/msvc-nothrow.c: Update.
	* gnulib/import/msvc-nothrow.h: Update.
	* gnulib/import/open.c: Update.
	* gnulib/import/openat-die.c: Update.
	* gnulib/import/openat-priv.h: Update.
	* gnulib/import/openat-proc.c: Update.
	* gnulib/import/openat.c: Update.
	* gnulib/import/openat.h: Update.
	* gnulib/import/opendir.c: Update.
	* gnulib/import/pathmax.h: Update.
	* gnulib/import/pipe-safer.c: Update.
	* gnulib/import/rawmemchr.c: Update.
	* gnulib/import/readdir.c: Update.
	* gnulib/import/readlink.c: Update.
	* gnulib/import/realloc.c: Update.
	* gnulib/import/ref-add.sin: Update.
	* gnulib/import/ref-del.sin: Update.
	* gnulib/import/rename.c: Update.
	* gnulib/import/rewinddir.c: Update.
	* gnulib/import/rmdir.c: Update.
	* gnulib/import/same-inode.h: Update.
	* gnulib/import/save-cwd.c: Update.
	* gnulib/import/save-cwd.h: Update.
	* gnulib/import/scratch_buffer.h: Update.
	* gnulib/import/secure_getenv.c: Update.
	* gnulib/import/setenv.c: Update.
	* gnulib/import/signal.in.h: Update.
	* gnulib/import/stat-time.c: Update.
	* gnulib/import/stat-time.h: Update.
	* gnulib/import/stat-w32.c: Update.
	* gnulib/import/stat-w32.h: Update.
	* gnulib/import/stat.c: Update.
	* gnulib/import/stdbool.in.h: Update.
	* gnulib/import/stddef.in.h: Update.
	* gnulib/import/stdint.in.h: Update.
	* gnulib/import/stdio.in.h: Update.
	* gnulib/import/stdlib.in.h: Update.
	* gnulib/import/str-two-way.h: Update.
	* gnulib/import/strchrnul.c: Update.
	* gnulib/import/strdup.c: Update.
	* gnulib/import/streq.h: Update.
	* gnulib/import/strerror-override.c: Update.
	* gnulib/import/strerror-override.h: Update.
	* gnulib/import/strerror.c: Update.
	* gnulib/import/string.in.h: Update.
	* gnulib/import/stripslash.c: Update.
	* gnulib/import/strnlen1.c: Update.
	* gnulib/import/strnlen1.h: Update.
	* gnulib/import/strstr.c: Update.
	* gnulib/import/strtok_r.c: Update.
	* gnulib/import/sys_stat.in.h: Update.
	* gnulib/import/sys_time.in.h: Update.
	* gnulib/import/sys_types.in.h: Update.
	* gnulib/import/tempname.c: Update.
	* gnulib/import/tempname.h: Update.
	* gnulib/import/time.in.h: Update.
	* gnulib/import/unistd--.h: Update.
	* gnulib/import/unistd-safer.h: Update.
	* gnulib/import/unistd.in.h: Update.
	* gnulib/import/unsetenv.c: Update.
	* gnulib/import/verify.h: Update.
	* gnulib/import/extra/snippet/warn-on-use.h: Update.
	* gnulib/import/wchar.in.h: Update.
	* gnulib/import/wctype.in.h: Update.
	* gnulib/import/xalloc-oversized.h: Update.
	* gnulib/update-gnulib.sh (GNULIB_COMMIT_SHA1): Set to
	"53e2c179f26a890fa6685af4b6c1397ee370433b".
2018-09-10 13:52:24 -04:00

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# mmap-anon.m4 serial 10
dnl Copyright (C) 2005, 2007, 2009-2016 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Detect how mmap can be used to create anonymous (not file-backed) memory
# mappings.
# - On Linux, AIX, OSF/1, Solaris, Cygwin, Interix, Haiku, both MAP_ANONYMOUS
# and MAP_ANON exist and have the same value.
# - On HP-UX, only MAP_ANONYMOUS exists.
# - On Mac OS X, FreeBSD, NetBSD, OpenBSD, only MAP_ANON exists.
# - On IRIX, neither exists, and a file descriptor opened to /dev/zero must be
# used.
AC_DEFUN([gl_FUNC_MMAP_ANON],
[
dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
# Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
# fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
# irrelevant for anonymous mappings.
AC_CHECK_FUNC([mmap], [gl_have_mmap=yes], [gl_have_mmap=no])
# Try to allow MAP_ANONYMOUS.
gl_have_mmap_anonymous=no
if test $gl_have_mmap = yes; then
AC_MSG_CHECKING([for MAP_ANONYMOUS])
AC_EGREP_CPP([I cannot identify this map], [
#include <sys/mman.h>
#ifdef MAP_ANONYMOUS
I cannot identify this map
#endif
],
[gl_have_mmap_anonymous=yes])
if test $gl_have_mmap_anonymous != yes; then
AC_EGREP_CPP([I cannot identify this map], [
#include <sys/mman.h>
#ifdef MAP_ANON
I cannot identify this map
#endif
],
[AC_DEFINE([MAP_ANONYMOUS], [MAP_ANON],
[Define to a substitute value for mmap()'s MAP_ANONYMOUS flag.])
gl_have_mmap_anonymous=yes])
fi
AC_MSG_RESULT([$gl_have_mmap_anonymous])
if test $gl_have_mmap_anonymous = yes; then
AC_DEFINE([HAVE_MAP_ANONYMOUS], [1],
[Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
config.h and <sys/mman.h>.])
fi
fi
])