#!/bin/sh

ACLOCAL="aclocal"
AUTOHEADER="autoheader"
AUTOMAKE="automake -a -c --foreign"
AUTOCONF="autoconf"
ACINCLUDE_FILES="lyxinclude.m4 libtool.m4 codeset.m4 gettext.m4 glibc21.m4 iconv.m4 isc-posix.m4 lcmessage.m4 progtest.m4 xforms.m4 qt.m4 gtk--.m4 gnome--.m4 gnome.m4 pspell.m4 cygwin.m4 pkg.m4"

# Discover what version of autoconf we are using.
autoversion=`$AUTOCONF --version | head -n 1`

echo "Using $autoversion"
case $autoversion in
    *2.13)
	cp config/acconfig.h .
	cp config/configure.in .
	rm -f configure.ac
	cp config/relyx_configure.in lib/reLyX/configure.in
	rm -f lib/reLyX/configure.ac
	EXTRA_ACINCLUDE_FILES="lyxinclude213.m4"
	;;
    *2.5[23467])
	rm -f acconfig.h
	rm -f configure.in
	cp config/configure.ac .
	rm -f lib/reLyX/configure.in
	cp config/relyx_configure.ac lib/reLyX/configure.ac
	EXTRA_ACINCLUDE_FILES="lyxinclude25x.m4"
	;;
    *)
	echo "This autoconf version is not supported by LyX."
	echo "LyX only supports autoconf 2.13 and 2.5[23467]."
	exit
	;;
esac

echo -n "Locating GNU m4... "
GNUM4=
for prog in $M4 gm4 gnum4 m4; do
	# continue if $prog generates error (e.g. does not exist)
	( $prog --version ) < /dev/null > /dev/null 2>&1
	if test $? -ne 0 ; then continue; fi

	# /dev/null input prevents a hang of the script for some m4 compilers (e.g. on FreeBSD)
	case `$prog --version < /dev/null 2>&1` in
	*GNU*)	GNUM4=$prog
		break ;;
	esac
done
if test x$GNUM4 = x ; then
	echo "not found."
	exit
else
	echo `which $GNUM4`
fi

# Generate acinclude.m4
echo -n "Generate acinclude.m4... "
rm -f acinclude.m4
(cd config ; cat ${ACINCLUDE_FILES} ${EXTRA_ACINCLUDE_FILES} >../acinclude.m4)
echo "done."

# Generate the Makefiles and configure files
if ( $ACLOCAL --version ) < /dev/null > /dev/null 2>&1; then
	echo "Building macros..."
	for dir in . lib/reLyX ; do
	    echo "        $dir"
	    ( cd $dir ; $ACLOCAL )
	done
	echo "done."
else
	echo "aclocal not found -- aborting"
	exit
fi

if ( $AUTOHEADER --version ) < /dev/null > /dev/null 2>&1; then
	echo "Building config header template..."
	for dir in . ; do
	    echo "        $dir"
	    ( cd $dir ; $AUTOHEADER )
	done
	echo "done."
else
	echo "autoheader not found -- aborting"
	exit
fi

if ( $AUTOMAKE --version ) < /dev/null > /dev/null 2>&1; then
	echo "Building Makefile templates..."
	for dir in . lib/reLyX ; do
	    echo "        $dir"
	    ( cd $dir ; $AUTOMAKE )
	done
	echo "done."
else
	echo "automake not found -- aborting"
	exit
fi

if ( $AUTOCONF --version ) < /dev/null > /dev/null 2>&1; then
	echo "Building configure..."
	for dir in . lib/reLyX ; do
	    echo "       $dir"
	    ( cd $dir ; $AUTOCONF )
	done
	echo "done."
else
	echo "autoconf not found -- aborting"
	exit
fi

# Autogenerate lib/configure.m4.
echo -n "Building lib/configure ... "
rm -f lib/configure
$GNUM4 lib/configure.m4 > lib/configure
chmod a+x lib/configure
echo "done."

echo
echo 'run "./configure ; make"'
echo