diff lib-autoconf-1/acgeneral.m4 @ 48:56c54cf7c5b6 r19-16b90

Import from CVS: tag r19-16b90
author cvs
date Mon, 13 Aug 2007 08:56:04 +0200
parents
children 05472e90ae02
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib-autoconf-1/acgeneral.m4	Mon Aug 13 08:56:04 2007 +0200
@@ -0,0 +1,1174 @@
+dnl Parameterized macros that do not check for something specific.
+dnl This file is part of Autoconf.
+dnl Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2, or (at your option)
+dnl any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software
+dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+dnl
+dnl Written by David MacKenzie, with help from
+dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
+dnl Roland McGrath, Noah Friedman, and david d zuhn.
+dnl
+changequote([,])dnl
+undefine([eval])dnl
+undefine([include])dnl
+undefine([shift])dnl
+undefine([format])dnl
+dnl
+ifdef([__gnu__], , [errprint(Autoconf requires GNU m4
+)m4exit(2)])dnl
+dnl
+dnl
+dnl Utility functions for stamping the configure script.
+dnl
+dnl
+define(AC_ACVERSION, 1.11)dnl
+dnl This is defined by the --version option of the autoconf script.
+ifdef([AC_PRINT_VERSION], [errprint(Autoconf version AC_ACVERSION
+)])dnl
+dnl
+dnl These are currently not used, for the sake of people who diff
+dnl configure scripts and don't want spurious differences.
+dnl But they are too clever to just delete.
+dnl
+define(AC_USER, [esyscmd(
+changequote({,})dnl
+# Extract the user name from the first pair of parentheses.
+({ac_sedcmd='s/[^(]*(\([^)]*\)).*/\1/';}
+changequote([,])dnl
+whoami || id|sed "$ac_sedcmd") 2>/dev/null|tr -d '\012')])dnl
+dnl
+define(AC_HOST, [esyscmd((hostname || uname -n) 2>/dev/null|tr -d '\012')])dnl
+dnl
+define(AC_DATE, [esyscmd(date|tr -d '\012')])dnl
+dnl
+dnl
+dnl Controlling Autoconf operation
+dnl
+dnl
+dnl This is separate from AC_INIT to prevent GNU m4 1.0 from coredumping
+dnl when AC_CONFIG_HEADER is used.
+define(AC_NOTICE,
+[# Guess values for system-dependent variables and create Makefiles.
+dnl [#] Generated automatically using autoconf.
+# Generated automatically using autoconf version] AC_ACVERSION [
+dnl [#] by AC_USER@AC_HOST on AC_DATE
+# Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+
+# This configure script is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as published
+# by the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This script is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+# Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+])dnl
+dnl
+define(AC_PARSEARGS,
+[# Save the original args to write them into config.status later.
+configure_args="[$]*"
+
+# Only options that might do something get documented.
+changequote(,)dnl
+ac_usage="Usage: configure [options] [host]
+Options: [defaults in brackets after descriptions]
+--build=BUILD		configure for building on BUILD [BUILD=HOST]
+--disable-FEATURE	do not include FEATURE (same as --enable-FEATURE=no)
+--enable-FEATURE[=ARG]	include FEATURE [ARG=yes]
+--exec-prefix=PREFIX	install host dependent files in PREFIX [/usr/local]
+--help			print this message
+--host=HOST		configure for HOST [guessed]
+--prefix=PREFIX		install host independent files in PREFIX [/usr/local]
+--quiet, --silent	do not print \`checking for...' messages
+--srcdir=DIR		find the sources in DIR [configure dir or ..]
+--target=TARGET		configure for TARGET [TARGET=HOST]
+--verbose		print results of checks
+--version		print the version of autoconf that created configure
+--with-PACKAGE[=ARG]	use PACKAGE [ARG=yes]
+--without-PACKAGE	do not use PACKAGE (same as --with-PACKAGE=no)
+--x-includes=DIR	X include files are in DIR
+--x-libraries=DIR	X library files are in DIR"
+changequote([,])dnl
+
+# Initialize some variables set by options.
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+build=NONE
+exec_prefix=
+host=NONE
+no_create=
+nonopt=NONE
+norecursion=
+prefix=
+program_prefix=
+program_suffix=
+program_transform_name=
+silent=
+srcdir=
+target=NONE
+verbose=
+x_includes=
+x_libraries=
+
+ac_prev=
+for ac_option
+do
+
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval "$ac_prev=\$ac_option"
+    ac_prev=
+    continue
+  fi
+
+  # Accept (but ignore some of) the important Cygnus configure
+  # options, so we can diagnose typos.
+
+  case "$ac_option" in
+changequote(,)dnl
+  -*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+changequote([,])dnl
+  *) ac_optarg= ;;
+  esac
+
+  case "$ac_option" in
+
+  -build | --build | --buil | --bui | --bu | --b)
+    ac_prev=build ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=* | --b=*)
+    build="$ac_optarg" ;;
+
+  -disable-* | --disable-*)
+    ac_feature=`echo $ac_option|sed -e 's/-*disable-//'`
+    # Reject names that aren't valid shell variable names.
+changequote(,)dnl
+    if test -n "`echo $ac_feature| sed 's/[-a-zA-Z0-9_]//g'`"; then
+changequote([,])dnl
+      AC_ERROR($ac_feature: invalid feature name)
+    fi
+    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+    eval "enable_${ac_feature}=no" ;;
+
+  -enable-* | --enable-*)
+    ac_feature=`echo $ac_option|sed -e 's/-*enable-//' -e 's/=.*//'`
+    # Reject names that aren't valid shell variable names.
+changequote(,)dnl
+    if test -n "`echo $ac_feature| sed 's/[-_a-zA-Z0-9]//g'`"; then
+changequote([,])dnl
+      AC_ERROR($ac_feature: invalid feature name)
+    fi
+    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+    case "$ac_option" in
+      *=*) ;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "enable_${ac_feature}='$ac_optarg'" ;;
+
+  # For backward compatibility, recognize -exec-prefix and --exec_prefix.
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix="$ac_optarg" ;;
+
+  -gas | --gas | --ga | --g)
+    with_gas=yes ;; # Obsolete; use --with-gas.
+
+  -help | --help | --hel | --he)
+    cat << EOF
+$ac_usage
+EOF
+    exit 0 ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host="$ac_optarg" ;;
+
+  -nfp | --nfp | --nf)
+    with_fp=no ;; # Obsolete; use --without-fp.
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c)
+    no_create=yes ;;
+
+  -norecursion | --norecursion | --norecursio | --norecursi \
+  | --norecurs | --norecur | --norecu | --norec | --nore | --nor)
+    norecursion=yes ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix="$ac_optarg" ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix="$ac_optarg" ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix="$ac_optarg" ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name="$ac_optarg" ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir="$ac_optarg" ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target="$ac_optarg" ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers)
+    echo "configure generated by autoconf version AC_ACVERSION"
+    exit 0 ;;
+
+  -with-* | --with-*)
+    ac_package=`echo $ac_option|sed -e 's/-*with-//' -e 's/=.*//'`
+    # Reject names that aren't valid shell variable names.
+changequote(,)dnl
+    if test -n "`echo $ac_package| sed 's/[-_a-zA-Z0-9]//g'`"; then
+changequote([,])dnl
+      AC_ERROR($ac_package: invalid package name)
+    fi
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    case "$ac_option" in
+      *=*) ;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "with_${ac_package}='$ac_optarg'" ;;
+
+  -without-* | --without-*)
+    ac_package=`echo $ac_option|sed -e 's/-*without-//'`
+    # Reject names that aren't valid shell variable names.
+changequote(,)dnl
+    if test -n "`echo $ac_package| sed 's/[-a-zA-Z0-9_]//g'`"; then
+changequote([,])dnl
+      AC_ERROR($ac_package: invalid package name)
+    fi
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    eval "with_${ac_package}=no" ;;
+
+  --x) with_x=yes ;; # Obsolete; use --with-x.
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes="$ac_optarg" ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries="$ac_optarg" ;;
+
+  -*) AC_ERROR([$ac_option: invalid option; use --help to show usage])
+    ;;
+
+  *) 
+changequote(,)dnl
+    if test -n "`echo $ac_option| sed 's/[-a-z0-9.]//g'`"; then
+changequote([,])dnl
+      AC_WARN($ac_option: invalid host type)
+    fi
+    if test "x$nonopt" != xNONE; then
+      AC_ERROR(can only configure for one host and one target at a time)
+    fi
+    nonopt="$ac_option"
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  AC_ERROR(missing argument to --`echo $ac_prev | sed 's/_/-/g'`)
+fi
+])dnl
+dnl
+define(AC_INIT,
+[#!/bin/sh
+AC_NOTICE
+AC_PARSEARGS
+AC_PREPARE($1)])dnl
+dnl
+define(AC_PREPARE,
+[trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
+trap 'rm -fr confdefs* $ac_clean_files' 0
+
+# Save the original args if we used an alternate arg parser.
+ac_configure_temp="${configure_args-[$]*}"
+# Strip out --no-create and --norecursion so they don't pile up.
+configure_args=
+for ac_arg in $ac_configure_temp; do
+  case "$ac_arg" in
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c) ;;
+  -norecursion | --norecursion | --norecursio | --norecursi \
+  | --norecurs | --norecur | --norecu | --norec | --nore | --nor) ;;
+  *) configure_args="$configure_args $ac_arg" ;;
+  esac
+done
+
+# NLS nuisances.
+# These must not be set unconditionally because not all systems understand
+# e.g. LANG=C (notably SCO).
+if test "${LC_ALL+set}" = 'set'; then LC_ALL=C; export LC_ALL; fi
+if test "${LANG+set}"   = 'set'; then LANG=C;   export LANG;   fi
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -rf conftest* confdefs.h
+# AIX cpp loses on an empty file, so make sure it contains at least a newline.
+echo > confdefs.h
+
+# A filename unique to this package, relative to the directory that
+# configure is in, which we can look for to find out if srcdir is correct.
+ac_unique_file=$1
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then `..'.
+  ac_prog=[$]0
+changequote(,)dnl
+  ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'`
+changequote([,])dnl
+  test "x$ac_confdir" = "x$ac_prog" && ac_confdir=.
+  srcdir=$ac_confdir
+  if test ! -r $srcdir/$ac_unique_file; then
+    srcdir=..
+  fi
+fi
+if test ! -r $srcdir/$ac_unique_file; then
+  if test x$ac_srcdir_defaulted = xyes; then
+    AC_ERROR(can not find sources in ${ac_confdir} or ..)
+  else
+    AC_ERROR(can not find sources in ${srcdir})
+  fi
+fi
+AC_LANG_C
+])dnl
+dnl
+define(AC_ENABLE,
+[[#] check whether --enable-$1 was given
+enableval="[$enable_]patsubst($1,-,_)"
+if test -n "$enableval"; then
+  ifelse([$2], , :, [$2])
+ifelse([$3], , , [else
+  $3
+])dnl
+fi
+])dnl
+dnl
+dnl Giving --with an argument is deprecated.
+define(AC_WITH,
+[[#] check whether --with-$1 or --without-$1 was given.
+withval="[$with_]patsubst($1,-,_)"
+if test -n "$withval"; then
+  ifelse([$2], , :, [$2])
+ifelse([$3], , , [else
+  $3
+])dnl
+fi
+])dnl
+dnl
+dnl Guess the value for the `prefix' variable by looking for
+dnl the argument program along PATH and taking its parent.
+dnl Example: if the argument is `gcc' and we find /usr/local/gnu/bin/gcc,
+dnl set `prefix' to /usr/local/gnu.
+define(AC_PREFIX,
+[if test -z "$prefix"
+then
+  AC_CHECKING([for $1 to derive installation directory prefix])
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="$IFS:"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test $ac_dir != . && test -f $ac_dir/$1; then
+changequote(,)dnl
+      # Not all systems have dirname.
+      prefix=`echo $ac_dir|sed 's%/[^/][^/]*$%%'`
+changequote([,])dnl
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+  AC_VERBOSE(chose installation directory prefix ${prefix})
+fi
+])dnl
+dnl
+define(AC_CONFIG_HEADER, [define(AC_CONFIG_NAMES, $1)])dnl
+dnl
+define(AC_DOREV, [#!/bin/sh
+# From configure.in $1
+])dnl
+define(AC_REVISION, [AC_DOREV(translit($1,$"))])dnl
+dnl
+dnl Subroutines of AC_PREREQ.
+dnl
+dnl Change the dots in version number $1 into commas.
+define(AC_PREREQ_SPLIT, [translit($1,.,[,])])dnl
+dnl
+dnl Default the ternary version number to 0 (e.g., 1,7 -> 1,7,0).
+define(AC_PREREQ_CANON, [$1,$2,ifelse([$3],,0,[$3])])dnl
+dnl
+dnl Complain and exit if the version number in $1 through $3 is less than
+dnl the version number in $4 through $6.
+dnl $7 is the printable version of the second version number.
+define(AC_PREREQ_COMPARE,
+[ifelse(builtin([eval],
+[$3 + $2 * 100 + $1 * 10000 < $6 + $5 * 100 + $4 * 10000]),1,
+[errprint(Autoconf version $7 or higher is required
+)m4exit(3)])])dnl
+dnl
+dnl Complain and exit if the Autoconf version is less than $1.
+define(AC_PREREQ,
+[AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
+AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])),[$1])])dnl
+dnl
+dnl
+dnl Setting variables
+dnl
+dnl
+dnl Several simple subroutines to do various flavors of quoting.
+dnl
+dnl Quote $1 against shell "s.
+define(AC_QUOTE_DQUOTE, [dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
+patsubst($1, changequote(,)\([$"`\\]\)changequote([,]), \\\1)])dnl
+dnl
+dnl Quote $1 against shell 's.
+define(AC_QUOTE_SQUOTE, [patsubst($1, ', '\\'')])dnl
+dnl
+dnl Quote $1 against shell here documents (<<EOF).
+define(AC_QUOTE_HERE, [changequote({,})dnl
+dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
+patsubst(patsubst($1, \(\\[$`\\]\), \\\1), \([$`]\), \\\1){}dnl
+changequote([,])])dnl
+dnl
+dnl Quote $1 against the right hand side of a sed substitution.
+define(AC_QUOTE_SED, [changequote({,})dnl
+dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
+dnl % and @ and ! are commonly used as the sed s separator character.
+patsubst($1, \([&\\%@!]\), \\\1){}dnl
+changequote([,])])dnl
+dnl
+dnl Quote $1 against tokenization.
+define(AC_QUOTE_TOKEN, [changequote({,})dnl
+patsubst($1, \([	 ]\), \\\1){}dnl
+changequote([,])])dnl
+dnl
+dnl Subroutines of AC_DEFINE.  Does more quoting magic than any sane person
+dnl should be able to understand.  The point of it all is that what goes into
+dnl Makefile et al should be verbatim what was written in configure.in.
+define(AC_DEFINE_QUOTE, [dnl
+AC_QUOTE_TOKEN(AC_QUOTE_SQUOTE(AC_QUOTE_DQUOTE($1)))])dnl
+dnl
+define(AC_DEFINE_SEDQUOTE, [dnl
+AC_QUOTE_DQUOTE(AC_QUOTE_HERE(AC_QUOTE_HERE(AC_QUOTE_SED($1))))])dnl
+dnl
+dnl Don't compare $2 to a blank, so we can support "-Dfoo=".
+dnl If creating a configuration header file, we add
+dnl commands to ac_sed_defs to define the variable.  ac_[due][ABCD]
+dnl get defined in config.status.  Here we just insert the
+dnl variable parts of the string: the variable name to define
+dnl and the value to give it.
+dnl The newlines around the curly braces prevent sh syntax errors.
+define(AC_DEFINE,[
+{
+dnl Uniformly use AC_DEFINE_[SED]QUOTE, so callers of AC_DEFINE_UNQUOTED
+dnl can use AC_QUOTE_* manually if they want to.
+test -n "$verbose" && \
+ifelse($#, 2,
+[define([AC_VAL], $2)dnl
+echo "	defining" $1 to be ifelse(AC_VAL,, empty, "AC_QUOTE_SQUOTE(AC_VAL)")],
+[define([AC_VAL], 1)dnl
+echo "	defining $1"])
+dnl
+echo "[#][define]" $1 "AC_QUOTE_SQUOTE(AC_VAL)" >> confdefs.h
+dnl Define DEFS even if AC_CONFIG_NAMES for use in user case statements.
+DEFS="$DEFS -D$1=AC_QUOTE_SQUOTE(AC_VAL)"
+ifdef([AC_CONFIG_NAMES],
+ac_sed_defs="dnl
+${ac_sed_defs}\${ac_dA}$1\${ac_dB}$1\${ac_dC}AC_DEFINE_SEDQUOTE(AC_VAL)\${ac_dD}
+\${ac_uA}$1\${ac_uB}$1\${ac_uC}AC_DEFINE_SEDQUOTE(AC_VAL)\${ac_uD}
+\${ac_eA}$1\${ac_eB}$1\${ac_eC}AC_DEFINE_SEDQUOTE(AC_VAL)\${ac_eD}
+"
+)dnl
+}
+])dnl
+dnl
+dnl Unsafe version of AC_DEFINE.
+dnl Users are responsible for the quoting nightmare.
+dnl Well, not all of it.  We need to pull the identify function out to
+dnl the top level, because m4 doesn't really support nested functions;
+dnl it doesn't distinguish between the arguments to the outer
+dnl function, which should be expanded, and the arguments to the inner
+dnl function, which shouldn't yet.
+define(AC_IDENTITY,$1)dnl
+define(AC_DEFINE_UNQUOTED,[dnl
+pushdef([AC_QUOTE_SQUOTE],defn([AC_IDENTITY]))dnl
+pushdef([AC_DEFINE_SEDQUOTE],defn([AC_IDENTITY]))dnl
+AC_DEFINE($1,$2)dnl
+popdef([AC_DEFINE_SEDQUOTE])dnl
+popdef([AC_QUOTE_SQUOTE])dnl
+])dnl
+dnl
+dnl Protects the argument from being diverted twice
+dnl if this macro is called twice for it.
+dnl Diversion 0 is the normal output.
+dnl Diversion 1 is sed substitutions for output files.
+dnl Diversion 2 is variable assignments for config.status.
+define(AC_SUBST,
+[ifdef([AC_SUBST_$1], ,
+[define([AC_SUBST_$1], )dnl
+divert(1)dnl
+s%@$1@%[$]$1%g
+divert(2)dnl
+$1='[$]$1'
+divert(0)dnl
+])])dnl
+dnl
+dnl
+dnl Printing messages
+dnl
+dnl
+define(AC_CHECKING,
+[test -n "$silent" || echo "checking $1"])dnl
+dnl
+define(AC_VERBOSE,
+[test -n "$verbose" && echo "	$1"])dnl
+dnl
+define(AC_WARN,
+[echo "configure: warning: $1" >&2])dnl
+dnl
+define(AC_ERROR,
+[echo "configure: $1" >&2; exit 1])dnl
+dnl
+dnl
+dnl Selecting which language to use for testing
+dnl
+dnl
+define(AC_LANG_C,
+[define([AC_LANG],[C])AC_PROVIDE([$0])ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='${CPP}'
+ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS >/dev/null 2>&1'
+])dnl
+dnl
+define(AC_LANG_CPLUSPLUS,
+[define([AC_LANG],[CPLUSPLUS])AC_PROVIDE([$0])ac_ext=C
+# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='${CXXCPP}'
+ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS >/dev/null 2>&1'
+])dnl
+dnl
+dnl Push the current language on a stack.
+define(AC_LANG_SAVE, [pushdef([AC_LANG_STACK], AC_LANG)])dnl
+dnl
+dnl Restore the current language from the stack.
+define(AC_LANG_RESTORE,
+[ifelse(AC_LANG_STACK,C,[ifelse(AC_LANG,C,,[AC_LANG_C])],[ifelse(AC_LANG,CPLUSPLUS,,[AC_LANG_CPLUSPLUS])])[]popdef([AC_LANG_STACK])])dnl
+dnl
+dnl
+dnl Enforcing ordering constraints
+dnl
+dnl
+define(AC_BEFORE,
+[ifdef([AC_PROVIDE_$2], [errprint(__file__:__line__: [$2 was called before $1
+])])])dnl
+dnl
+define(AC_REQUIRE,
+[ifdef([AC_PROVIDE_$1],,[indir([$1])
+])])dnl
+dnl
+define(AC_PROVIDE,
+[define([AC_PROVIDE_$1],)])dnl
+dnl
+define(AC_OBSOLETE,
+[errprint(__file__:__line__: warning: [$1] is obsolete[$2]
+)])dnl
+dnl
+dnl
+dnl Checking for kinds of features
+dnl
+dnl
+define(AC_PROGRAM_CHECK,
+[if test -z "[$]$1"; then
+  # Extract the first word of `$2', so it can be a program name with args.
+  set ac_dummy $2; ac_word=[$]2
+  AC_CHECKING([for $ac_word])
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      $1="$3"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+fi
+ifelse([$4],,, [test -z "[$]$1" && $1="$4"])
+test -n "[$]$1" && AC_VERBOSE(setting $1 to [$]$1)
+AC_SUBST($1)dnl
+])dnl
+dnl
+define(AC_PROGRAMS_CHECK,
+[for ac_prog in $2
+do
+AC_PROGRAM_CHECK($1, [$]ac_prog, [$]ac_prog, )
+test -n "[$]$1" && break
+done
+ifelse([$3],,, [test -n "[$]$1" || $1="$3"
+])])dnl
+dnl
+define(AC_PROGRAM_PATH,
+[if test -z "[$]$1"; then
+  # Extract the first word of `$2', so it can be a program name with args.
+  set ac_dummy $2; ac_word=[$]2
+  AC_CHECKING([for $ac_word])
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      $1="$ac_dir/$ac_word"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+fi
+ifelse([$3],,, [test -z "[$]$1" && $1="$3"])
+test -n "[$]$1" && AC_VERBOSE(setting $1 to [$]$1)
+AC_SUBST($1)dnl
+])dnl
+define(AC_PROGRAMS_PATH,
+[for ac_prog in $2
+do
+AC_PROGRAM_PATH($1, [$]ac_prog)
+test -n "[$]$1" && break
+done
+ifelse([$3],,, [test -n "[$]$1" || $1="$3"
+])])dnl
+define(AC_HEADER_EGREP,
+[AC_REQUIRE_CPP()AC_PROVIDE([$0])echo '#include "confdefs.h"
+#include <$2>' > conftest.${ac_ext}
+eval "$ac_cpp conftest.${ac_ext} > conftest.out 2>&1"
+if egrep "$1" conftest.out >/dev/null 2>&1; then
+  ifelse([$3], , :, [rm -rf conftest*
+  $3
+])
+ifelse([$4], , , [else
+  rm -rf conftest*
+  $4
+])dnl
+fi
+rm -f conftest*
+])dnl
+dnl
+dnl Because this macro is used by AC_GCC_TRADITIONAL, which must come early,
+dnl it is not included in AC_BEFORE checks.
+define(AC_PROGRAM_EGREP,
+[AC_REQUIRE_CPP()AC_PROVIDE([$0])cat > conftest.${ac_ext} <<EOF
+#include "confdefs.h"
+[$2]
+EOF
+eval "$ac_cpp conftest.${ac_ext} > conftest.out 2>&1"
+if egrep "$1" conftest.out >/dev/null 2>&1; then
+  ifelse([$3], , :, [rm -rf conftest*
+  $3
+])
+ifelse([$4], , , [else
+  rm -rf conftest*
+  $4
+])dnl
+fi
+rm -f conftest*
+])dnl
+dnl
+define(AC_HEADER_CHECK,
+[AC_CHECKING([for $1])
+ifelse([$3], , [AC_TEST_CPP([#include <$1>], [$2])],
+[AC_TEST_CPP([#include <$1>], [$2], [$3])])
+])dnl
+dnl
+define(AC_COMPILE_CHECK,
+[AC_PROVIDE([$0])dnl
+ifelse([$1], , , [AC_CHECKING([for $1])]
+)dnl
+dnl We use return because because C++ requires a prototype for exit.
+cat > conftest.${ac_ext} <<EOF
+#include "confdefs.h"
+[$2]
+int main() { return 0; }
+int t() { [$3]; return 0; }
+EOF
+dnl Don't try to run the program, which would prevent cross-configuring.
+if eval $ac_compile; then
+  ifelse([$4], , :, [rm -rf conftest*
+  $4
+])
+ifelse([$5], , , [else
+  rm -rf conftest*
+  $5
+])dnl
+fi
+rm -f conftest*]
+)dnl
+dnl
+define(AC_TEST_PROGRAM,
+[AC_PROVIDE([$0])ifelse([$4], , , [AC_REQUIRE([AC_CROSS_CHECK])if test -n "$cross_compiling"
+then
+  $4
+else
+])dnl
+cat > conftest.${ac_ext} <<EOF
+#include "confdefs.h"
+[$1]
+EOF
+eval $ac_compile
+if test -s conftest && (./conftest; exit) 2>/dev/null; then
+  ifelse([$2], , :, [$2
+])
+ifelse([$3], , , [else
+  $3
+])dnl
+fi
+ifelse([$4], , , fi
+)dnl
+rm -fr conftest*])dnl
+dnl
+define(AC_TEST_CPP,
+[AC_REQUIRE_CPP()dnl
+cat > conftest.${ac_ext} <<EOF
+#include "confdefs.h"
+[$1]
+EOF
+# Some shells (Coherent) do redirections in the wrong order, so need
+# the parens.
+ac_err=`eval "($ac_cpp conftest.${ac_ext} >/dev/null) 2>&1"`
+if test -z "$ac_err"; then
+  ifelse([$2], , :, [rm -rf conftest*
+  $2
+])
+ifelse([$3], , , [else
+  rm -rf conftest*
+  $3
+])dnl
+fi
+rm -f conftest*])dnl
+dnl
+define(AC_REPLACE_FUNCS,
+[for ac_func in $1
+do
+AC_COMPILE_CHECK([${ac_func}], [#include <ctype.h>], [
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_${ac_func}) || defined (__stub___${ac_func})
+choke me
+#else
+/* Override any gcc2 internal prototype to avoid an error.  */
+extern char ${ac_func}(); ${ac_func}();
+#endif
+], , [LIBOBJS="$LIBOBJS ${ac_func}.o"
+AC_VERBOSE(using ${ac_func}.o instead)])
+done
+AC_SUBST(LIBOBJS)dnl
+])dnl
+dnl
+define(AC_FUNC_CHECK,
+[ifelse([$3], , [AC_COMPILE_CHECK($1, [#include <ctype.h>], [
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$1) || defined (__stub___$1)
+choke me
+#else
+/* Override any gcc2 internal prototype to avoid an error.  */
+extern char $1(); $1();
+#endif
+],
+$2)], [AC_COMPILE_CHECK($1, [#include <ctype.h>], [
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$1) || defined (__stub___$1)
+choke me
+#else
+/* Override any gcc2 internal prototype to avoid an error.  */
+extern char $1(); $1();
+#endif
+],
+$2, $3)])dnl
+])dnl
+dnl
+define(AC_HAVE_FUNCS,
+[for ac_func in $1
+do
+changequote(,)dnl
+ac_tr_func=HAVE_`echo $ac_func | tr '[a-z]' '[A-Z]'`
+changequote([,])dnl
+AC_FUNC_CHECK(${ac_func},
+AC_DEFINE(${ac_tr_func}))dnl
+done
+])dnl
+dnl
+define(AC_HAVE_HEADERS,
+[AC_REQUIRE_CPP()dnl Make sure the cpp check happens outside the loop.
+for ac_hdr in $1
+do
+changequote(,)dnl
+ac_tr_hdr=HAVE_`echo $ac_hdr | tr '[a-z]./' '[A-Z]__'`
+changequote([,])dnl
+AC_HEADER_CHECK(${ac_hdr},
+AC_DEFINE(${ac_tr_hdr}))dnl
+done
+])dnl
+dnl
+define(AC_HAVE_LIBRARY, [dnl
+changequote(/,/)dnl
+define(/AC_LIB_NAME/, dnl
+patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
+changequote([,])dnl
+ac_save_LIBS="${LIBS}"
+LIBS="${LIBS} -l[]AC_LIB_NAME[]"
+ac_have_lib=""
+AC_COMPILE_CHECK([-l[]AC_LIB_NAME[]], , [main();], [ac_have_lib="1"])dnl
+LIBS="${ac_save_LIBS}"
+ifelse($#, 1, [dnl
+if test -n "${ac_have_lib}"; then
+   AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
+   LIBS="${LIBS} -l[]AC_LIB_NAME[]"
+fi
+undefine(AC_LIB_NAME)dnl
+], [dnl
+if test -n "${ac_have_lib}"; then
+   :; $2
+else
+   :; $3
+fi
+])])dnl
+dnl
+define(AC_SIZEOF_TYPE,
+[AC_CHECKING(size of $1)
+AC_TEST_PROGRAM([#include <stdio.h>
+main()
+{
+  FILE *f=fopen("conftestval", "w");
+  if (!f) exit(1);
+  fprintf(f, "%d\n", sizeof($1));
+  exit(0);
+}], ac_size=`cat conftestval`, AC_ERROR(can not determine size of $1))
+AC_DEFINE_UNQUOTED(changequote(<<,>>) translit(sizeof_$1, [a-z *], [A-Z_P])<<>>changequote([,]), $ac_size)])dnl
+dnl
+dnl
+dnl The big finish
+dnl
+dnl
+define(AC_OUTPUT,
+[changequote(,)dnl
+
+# The preferred way to propogate these variables is regular @ substitutions.
+if test -n "$prefix"; then
+  ac_prsub="s%^prefix\\([ 	]*\\)=\\([ 	]*\\).*$%prefix\\1=\\2$prefix%"
+else
+  prefix=/usr/local
+fi
+if test -n "$exec_prefix"; then
+  ac_prsub="$ac_prsub
+s%^exec_prefix\\([ 	]*\\)=\\([ 	]*\\).*$%exec_prefix\\1=\\2$exec_prefix%"
+else
+  exec_prefix='${prefix}' # Let make expand it.
+fi
+
+# Any assignment to VPATH causes Sun make to only execute
+# the first set of double-colon rules, so remove it if not needed.
+# If there is a colon in the path, we need to keep it.
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[ 	]*VPATH[ 	]*=[^:]*$/d'
+fi
+
+# Quote sed substitution magic chars in DEFS.
+cat >conftest.def <<EOF
+$DEFS
+EOF
+ac_escape_ampersand_and_backslash='s%[&\\]%\\&%g'
+DEFS=`sed "$ac_escape_ampersand_and_backslash" <conftest.def`
+rm -f conftest.def
+# Substitute for predefined variables.
+changequote([,])dnl
+AC_SUBST(LIBS)dnl
+AC_SUBST(srcdir)dnl
+AC_SUBST(top_srcdir)dnl
+AC_SUBST(prefix)dnl
+AC_SUBST(exec_prefix)dnl
+dnl Substituting for DEFS would confuse sed if it contains multiple lines.
+ifdef([AC_CONFIG_NAMES],
+[divert(1)dnl
+s%@DEFS@%-DHAVE_CONFIG_H%],
+[divert(1)dnl
+s%@DEFS@%$DEFS%]
+[divert(2)dnl
+DEFS='$DEFS'
+])dnl
+divert(2)dnl
+ac_prsub='$ac_prsub'
+ac_vpsub='$ac_vpsub'
+extrasub='$extrasub'
+divert(0)dnl
+
+trap 'rm -f config.status; exit 1' 1 2 15
+echo creating config.status
+rm -f config.status
+cat > config.status <<EOF
+#!/bin/sh
+# Generated automatically by configure.
+# Run this file to recreate the current configuration.
+# This directory was configured as follows,
+dnl hostname on some systems (SVR3.2, Linux) returns a bogus exit status,
+dnl so uname gets run too.
+# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+#
+[#] [$]0 [$]quoted_arguments
+
+changequote(,)dnl
+ac_cs_usage="Usage: config.status [--recheck] [--version] [--help]"
+changequote([,])dnl
+for ac_option
+do
+  case "[\$]ac_option" in
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    echo running [\$]{CONFIG_SHELL-/bin/sh} [$]0 [$]quoted_arguments --no-create
+    exec [\$]{CONFIG_SHELL-/bin/sh} [$]0 [$]quoted_arguments --no-create ;;
+  -version | --version | --versio | --versi | --vers | --ver | --ve | --v)
+    echo "config.status generated by autoconf version AC_ACVERSION"
+    exit 0 ;;
+  -help | --help | --hel | --he | --h)
+    echo "[\$]ac_cs_usage"; exit 0 ;;
+  *) echo "[\$]ac_cs_usage"; exit 1 ;;
+  esac
+done
+
+ifdef([AC_CONFIG_NAMES],
+[trap 'rm -fr $1 AC_CONFIG_NAMES conftest*; exit 1' 1 2 15],
+[trap 'rm -f $1; exit 1' 1 2 15])
+dnl Insert the variable assignments.
+undivert(2)dnl
+EOF
+cat >> config.status <<\EOF
+
+ac_given_srcdir=$srcdir
+
+CONFIG_FILES=${CONFIG_FILES-"$1"}
+for ac_file in .. ${CONFIG_FILES}; do if test "x$ac_file" != x..; then
+  # Remove last slash and all that follows it.  Not all systems have dirname.
+changequote(,)dnl
+  ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+changequote([,])dnl
+  if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+    # The file is in a subdirectory.
+    test ! -d "$ac_dir" && mkdir "$ac_dir"
+    ac_dir_suffix="/$ac_dir"
+  else
+    ac_dir_suffix=
+  fi
+
+changequote(,)dnl
+  # A "../" for each directory in $ac_dir_suffix.
+  ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'`
+changequote([,])dnl
+  case "$ac_given_srcdir" in
+  .)  srcdir=.
+      if test -z "$ac_dir_suffix"; then top_srcdir=.
+      else top_srcdir=`echo $ac_dots|sed 's%/$%%'`; fi ;;
+  /*) srcdir="$ac_given_srcdir$ac_dir_suffix"; top_srcdir="$ac_given_srcdir" ;;
+  *) # Relative path.
+    srcdir="$ac_dots$ac_given_srcdir$ac_dir_suffix"
+    top_srcdir="$ac_dots$ac_given_srcdir" ;;
+  esac
+
+  echo creating "$ac_file"
+  rm -f "$ac_file"
+  comment_str="Generated automatically from `echo $ac_file|sed 's|.*/||'`.in by configure."
+  case "$ac_file" in
+    *.c | *.h | *.C | *.cc | *.m )  echo "/* $comment_str */" > "$ac_file" ;;
+    * )          echo "# $comment_str"     > "$ac_file" ;;
+  esac
+  sed -e "
+$ac_prsub
+$ac_vpsub
+dnl Shell code in configure.in might set extrasub.
+$extrasub
+dnl Insert the sed substitutions.
+undivert(1)dnl
+" $ac_given_srcdir/${ac_file}.in >> $ac_file
+fi; done
+AC_OUTPUT_HEADER
+$2
+exit 0
+EOF
+chmod +x config.status
+# Some shells look in PATH for config.status without the "./".
+test -n "$no_create" || ${CONFIG_SHELL-/bin/sh} ./config.status
+])dnl
+dnl This is a subroutine of AC_OUTPUT, broken out primarily to avoid bugs
+dnl with long definitions in GNU m4 1.0.  This is called inside a quoted
+dnl here document whose contents are going into config.status.
+define(AC_OUTPUT_HEADER,[dnl
+ifdef([AC_CONFIG_NAMES],[dnl
+changequote(<<,>>)dnl
+
+# These sed commands are put into ac_sed_defs when defining a macro.
+# They are broken into pieces to make the sed script easier to manage.
+# They are passed to sed as "A NAME B NAME C VALUE D", where NAME
+# is the cpp macro being defined and VALUE is the value it is being given.
+# Each defining turns into a single global substitution command.
+# Hopefully no one uses "!" as a variable value.
+# Other candidates for the sed separators, like , and @, do get used.
+#
+# ac_d sets the value in "#define NAME VALUE" lines.
+ac_dA='s!^\([ 	]*\)#\([ 	]*define[ 	][ 	]*\)'
+ac_dB='\([ 	][ 	]*\)[^ 	]*!\1#\2'
+ac_dC='\3'
+ac_dD='!g'
+# ac_u turns "#undef NAME" with trailing blanks into "#define NAME VALUE".
+ac_uA='s!^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_uB='\([ 	]\)!\1#\2define\3'
+ac_uC=' '
+ac_uD='\4!g'
+# ac_e turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
+ac_eA='s!^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_eB='<<$>>!\1#\2define\3'
+ac_eC=' '
+ac_eD='!g'
+changequote([,])dnl
+rm -f conftest.sed
+EOF
+# Turn off quoting long enough to insert the sed commands.
+rm -f conftest.sh
+cat > conftest.sh <<EOF
+$ac_sed_defs
+EOF
+
+# Break up $ac_sed_defs (now in conftest.sh) because some shells have a limit
+# on the size of here documents.
+
+# Maximum number of lines to put in a single here document.
+ac_max_sh_lines=9
+
+while :
+do
+  # wc gives bogus results for an empty file on some AIX systems.
+  ac_lines=`grep -c . conftest.sh`
+  if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
+  rm -f conftest.s1 conftest.s2
+  sed ${ac_max_sh_lines}q conftest.sh > conftest.s1 # Like head -9.
+  sed 1,${ac_max_sh_lines}d conftest.sh > conftest.s2 # Like tail +10.
+  # Write a limited-size here document to append to conftest.sed.
+  echo 'cat >> conftest.sed <<CONFEOF' >> config.status
+  cat conftest.s1 >> config.status
+  echo 'CONFEOF' >> config.status
+  rm -f conftest.s1 conftest.sh
+  mv conftest.s2 conftest.sh
+done
+rm -f conftest.sh
+
+# Now back to your regularly scheduled config.status.
+cat >> config.status <<\EOF
+# This sed command replaces #undef's with comments.  This is necessary, for
+# example, in the case of _POSIX_SOURCE, which is predefined and required
+# on some systems where configure will not decide to define it in
+[#] AC_CONFIG_NAMES.
+cat >> conftest.sed <<\CONFEOF
+changequote(,)dnl
+s,^[ 	]*#[ 	]*undef[ 	][ 	]*[a-zA-Z_][a-zA-Z_0-9]*,/* & */,
+changequote([,])dnl
+CONFEOF
+rm -f conftest.h
+# Break up the sed commands because old seds have small limits.
+ac_max_sed_lines=20
+
+CONFIG_HEADERS=${CONFIG_HEADERS-"AC_CONFIG_NAMES"}
+for ac_file in .. ${CONFIG_HEADERS}; do if test "x$ac_file" != x..; then
+  echo creating $ac_file
+
+  cp $ac_given_srcdir/$ac_file.in conftest.h1
+  cp conftest.sed conftest.stm
+  while :
+  do
+    ac_lines=`grep -c . conftest.stm`
+    if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
+    rm -f conftest.s1 conftest.s2 conftest.h2
+    sed ${ac_max_sed_lines}q conftest.stm > conftest.s1 # Like head -20.
+    sed 1,${ac_max_sed_lines}d conftest.stm > conftest.s2 # Like tail +21.
+    sed -f conftest.s1 < conftest.h1 > conftest.h2
+    rm -f conftest.s1 conftest.h1 conftest.stm
+    mv conftest.h2 conftest.h1
+    mv conftest.s2 conftest.stm
+  done
+  rm -f conftest.stm conftest.h
+  echo "/* $ac_file.  Generated automatically by configure.  */" > conftest.h
+  cat conftest.h1 >> conftest.h
+  rm -f conftest.h1
+  if cmp -s $ac_file conftest.h 2>/dev/null; then
+    # The file exists and we would not be changing it.
+    echo "$ac_file is unchanged"
+    rm -f conftest.h
+  else
+    rm -f $ac_file
+    mv conftest.h $ac_file
+  fi
+fi; done
+rm -f conftest.sed
+
+])])dnl