gcc/libffi/aclocal.m4

dnl aclocal.m4 generated automatically by aclocal 1.4

dnl Copyright (C) 1994, 1995-8, 1999 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.

dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
dnl PARTICULAR PURPOSE.

sinclude(../libtool.m4)
dnl The lines below arrange for aclocal not to bring libtool.m4
dnl AC_PROG_LIBTOOL into aclocal.m4, while still arranging for automake
dnl to add a definition of LIBTOOL to Makefile.in.
ifelse(yes,no,[
AC_DEFUN([AC_PROG_LIBTOOL],)
AC_DEFUN([AM_PROG_LIBTOOL],)
AC_SUBST(LIBTOOL)
])

# mmap(2) blacklisting.  Some platforms provide the mmap library routine
# but don't support all of the features we need from it.
AC_DEFUN([AC_FUNC_MMAP_BLACKLIST],
[if test $ac_cv_header_sys_mman_h != yes \
 || test $ac_cv_func_mmap != yes; then
   ac_cv_func_mmap_file=no
   ac_cv_func_mmap_dev_zero=no
   ac_cv_func_mmap_anon=no
else
   AC_CACHE_CHECK([whether read-only mmap of a plain file works],
  ac_cv_func_mmap_file,
  [# Add a system to this blacklist if
   # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a
   # memory area containing the same data that you'd get if you applied
   # read() to the same fd.  The only system known to have a problem here
   # is VMS, where text files have record structure.
   case "$host_os" in
     vms* | ultrix*)
	ac_cv_func_mmap_file=no ;;
     *)
	ac_cv_func_mmap_file=yes;;
   esac])
   AC_CACHE_CHECK([whether mmap from /dev/zero works],
  ac_cv_func_mmap_dev_zero,
  [# Add a system to this blacklist if it has mmap() but /dev/zero
   # does not exist, or if mmapping /dev/zero does not give anonymous
   # zeroed pages with both the following properties:
   # 1. If you map N consecutive pages in with one call, and then
   #    unmap any subset of those pages, the pages that were not
   #    explicitly unmapped remain accessible.
   # 2. If you map two adjacent blocks of memory and then unmap them
   #    both at once, they must both go away.
   # Systems known to be in this category are Windows (all variants),
   # VMS, and Darwin.
   case "$host_os" in
     vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00)
	ac_cv_func_mmap_dev_zero=no ;;
     *)
	ac_cv_func_mmap_dev_zero=yes;;
   esac])

   # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for.
   AC_CACHE_CHECK([for MAP_ANON(YMOUS)], ac_cv_decl_map_anon,
    [AC_TRY_COMPILE(
[#include <sys/types.h>
#include <sys/mman.h>
#include <unistd.h>

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
],
[int n = MAP_ANONYMOUS;],
    ac_cv_decl_map_anon=yes,
    ac_cv_decl_map_anon=no)])

   if test $ac_cv_decl_map_anon = no; then
     ac_cv_func_mmap_anon=no
   else
     AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works],
     ac_cv_func_mmap_anon,
  [# Add a system to this blacklist if it has mmap() and MAP_ANON or
   # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
   # doesn't give anonymous zeroed pages with the same properties listed
   # above for use of /dev/zero.
   # Systems known to be in this category are Windows, VMS, and SCO Unix.
   case "$host_os" in
     vms* | cygwin* | pe | mingw* | sco* | udk* )
	ac_cv_func_mmap_anon=no ;;
     *)
	ac_cv_func_mmap_anon=yes;;
   esac])
   fi
fi

if test $ac_cv_func_mmap_file = yes; then
  AC_DEFINE(HAVE_MMAP_FILE, 1,
	    [Define if read-only mmap of a plain file works.])
fi
if test $ac_cv_func_mmap_dev_zero = yes; then
  AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
	    [Define if mmap of /dev/zero works.])
fi
if test $ac_cv_func_mmap_anon = yes; then
  AC_DEFINE(HAVE_MMAP_ANON, 1,
	    [Define if mmap with MAP_ANON(YMOUS) works.])
fi
])

sinclude(../config/accross.m4)

# Like AC_CONFIG_HEADER, but automatically create stamp file.

AC_DEFUN(AM_CONFIG_HEADER,
[AC_PREREQ([2.12])
AC_CONFIG_HEADER([$1])
dnl When config.status generates a header, we must update the stamp-h file.
dnl This file resides in the same directory as the config header
dnl that is generated.  We must strip everything past the first ":",
dnl and everything past the last "/".
AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
<<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
<<am_indx=1
for am_file in <<$1>>; do
  case " <<$>>CONFIG_HEADERS " in
  *" <<$>>am_file "*<<)>>
    echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
    ;;
  esac
  am_indx=`expr "<<$>>am_indx" + 1`
done<<>>dnl>>)
changequote([,]))])

# Do all the work for Automake.  This macro actually does too much --
# some checks are only needed if your package does certain things.
# But this isn't really a big deal.

# serial 1

dnl Usage:
dnl AM_INIT_AUTOMAKE(package,version, [no-define])

AC_DEFUN(AM_INIT_AUTOMAKE,
[AC_REQUIRE([AC_PROG_INSTALL])
PACKAGE=[$1]
AC_SUBST(PACKAGE)
VERSION=[$2]
AC_SUBST(VERSION)
dnl test to see if srcdir already configured
if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
  AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
fi
ifelse([$3],,
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
AC_REQUIRE([AM_SANITY_CHECK])
AC_REQUIRE([AC_ARG_PROGRAM])
dnl FIXME This is truly gross.
missing_dir=`cd $ac_aux_dir && pwd`
AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
AC_REQUIRE([AC_PROG_MAKE_SET])])

#
# Check to make sure that the build environment is sane.
#

AC_DEFUN(AM_SANITY_CHECK,
[AC_MSG_CHECKING([whether build environment is sane])
# Just in case
sleep 1
echo timestamp > conftestfile
# Do `set' in a subshell so we don't clobber the current shell's
# arguments.  Must try -L first in case configure is actually a
# symlink; some systems play weird games with the mod time of symlinks
# (eg FreeBSD returns the mod time of the symlink's containing
# directory).
if (
   set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
   if test "[$]*" = "X"; then
      # -L didn't work.
      set X `ls -t $srcdir/configure conftestfile`
   fi
   if test "[$]*" != "X $srcdir/configure conftestfile" \
      && test "[$]*" != "X conftestfile $srcdir/configure"; then

      # If neither matched, then we have a broken ls.  This can happen
      # if, for instance, CONFIG_SHELL is bash and it inherits a
      # broken ls alias from the environment.  This has actually
      # happened.  Such a system could not be considered "sane".
      AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
alias in your environment])
   fi

   test "[$]2" = conftestfile
   )
then
   # Ok.
   :
else
   AC_MSG_ERROR([newly created file is older than distributed files!
Check your system clock])
fi
rm -f conftest*
AC_MSG_RESULT(yes)])

dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
dnl The program must properly implement --version.
AC_DEFUN(AM_MISSING_PROG,
[AC_MSG_CHECKING(for working $2)
# Run test in a subshell; some versions of sh will print an error if
# an executable is not found, even if stderr is redirected.
# Redirect stdin to placate older versions of autoconf.  Sigh.
if ($2 --version) < /dev/null > /dev/null 2>&1; then
   $1=$2
   AC_MSG_RESULT(found)
else
   $1="$3/missing $2"
   AC_MSG_RESULT(missing)
fi
AC_SUBST($1)])

# Add --enable-maintainer-mode option to configure.
# From Jim Meyering

# serial 1

AC_DEFUN(AM_MAINTAINER_MODE,
[AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
  dnl maintainer-mode is disabled by default
  AC_ARG_ENABLE(maintainer-mode,
[  --enable-maintainer-mode enable make rules and dependencies not useful
                          (and sometimes confusing) to the casual installer],
      USE_MAINTAINER_MODE=$enableval,
      USE_MAINTAINER_MODE=no)
  AC_MSG_RESULT($USE_MAINTAINER_MODE)
  AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
  MAINT=$MAINTAINER_MODE_TRUE
  AC_SUBST(MAINT)dnl
]
)

# Define a conditional.

AC_DEFUN(AM_CONDITIONAL,
[AC_SUBST($1_TRUE)
AC_SUBST($1_FALSE)
if $2; then
  $1_TRUE=
  $1_FALSE='#'
else
  $1_TRUE='#'
  $1_FALSE=
fi])