dnl 
dnl   Copyright 2001-2006 Adrian Thurston <thurston@cs.queensu.ca>
dnl

dnl   This file is part of Ragel.
dnl  
dnl   Ragel 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 of the License, or
dnl   (at your option) any later version.
dnl   
dnl   Ragel 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 Ragel; if not, write to the Free Software
dnl   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
  
AC_INIT(ragel/main.cpp)
AC_CONFIG_HEADER(common/config.h)

dnl Set true if build system should generate parsers from flex, bison, and
dnl gperf sources. Set false if generated files are included and not to be
dnl built (production).
AC_SUBST(BUILD_PARSERS,true)

dnl Checks for programs.
AC_PROG_CC
AC_DEFINE_UNQUOTED(CC,$CC)

dnl Checks for programs.
AC_PROG_CXX
AC_DEFINE_UNQUOTED(CXX,$CXX)

dnl Set test on c++ compiler.
AC_LANG_CPLUSPLUS

dnl Check for definition of MAKE.
AC_PROG_MAKE_SET

if test $BUILD_PARSERS = true; then

dnl Check for flex
AC_CHECK_PROG(FLEX, flex, flex)
if test -z "$FLEX"; then
	echo
	echo "error: flex is required to compile ragel"
	echo
	exit 1
fi

dnl Check for gperf
AC_CHECK_PROG(GPERF, gperf, gperf)
if test -z "$GPERF"; then
	echo
	echo "error: gperf is required to compile ragel"
	echo
	exit 1
fi

dnl Check for bison
AC_CHECK_PROG(BISON, bison, bison)
if test -z "$BISON"; then
	echo
	echo "error: bison is required to compile ragel"
	echo
	exit 1
fi

dnl Sorry, Ragel will not compile with bison++.
if "$BISON" --version | grep 'bison++'; then
	echo
	echo "error: sorry, ragel cannot be compiled with bison++"
	echo
	exit 1
fi

fi # BUILD_PARSERS

dnl Check for the D compiler
AC_CHECK_PROG(GDC, gdc, gdc)
if test -n "$GDC"; then
	AC_DEFINE_UNQUOTED(GDC,$GDC)
fi

dnl Check for the Objective-C compiler
AC_MSG_CHECKING([for the Objective-C compiler])
cat > conftest.m <<EOF
int main() { return 0; }
EOF
GOBJC=""
if gcc -x objective-c conftest.m -o conftest.bin 2>/dev/null; then
	GOBJC="gcc -x objective-c"
	AC_MSG_RESULT([yes])
	AC_DEFINE_UNQUOTED(GOBJC,$GOBJC)
else
	AC_MSG_RESULT([no])
fi
AC_SUBST(GOBJC)

dnl Check for the Java compiler.
AC_CHECK_PROG(JAVAC, javac, javac)
if test -n "$JAVAC"; then
	AC_DEFINE_UNQUOTED(JAVAC,$JAVAC)
fi

dnl Check for TXL.
AC_CHECK_PROG(TXL, txl, txl)
if test -n "$TXL"; then
	AC_DEFINE_UNQUOTED(TXL,$TXL)
fi

dnl write output files
AC_OUTPUT(Makefile common/Makefile ragel/Makefile rlcodegen/Makefile doc/Makefile test/Makefile)

echo "configuration of ragel complete"