configure

#!/bin/sh

opt=false
dbg=true
prefix=/usr/local
libdir=lib

for arg in $*; do
	case $arg in
	--enable-opt)
		opt=true
		;;
	--disable-opt)
		opt=false
		;;
	--enable-debug)
		dbg=true
		;;
	--disable-debug)
		dbg=false
		;;

	--prefix=*)
		prefix=`echo $arg | sed 's/--prefix=//'`
		;;

	--libdir=*)
		libdir=`echo $arg | sed 's/--libdir=//'`
		;;
	*)
		;;
	esac
done

sys=`uname -s | sed 's/MINGW.*/mingw/'`

testsrc=/tmp/meshfile_cfg_test.c
testbin=/tmp/meshfile_cfg_test
testlog=/tmp/meshfile_cfg_test.log

run_test() {
	if ! $CC -o $testbin $testsrc >$testlog 2>&1; then
		echo "failed to compile test program, see $testlog" >&2
		exit 1
	fi
	$testbin && return 0 || return 1
}

if [ -z "$CC" ]; then 
	CC=cc
fi

# check if CC is gcc
echo 'int main(void) {' >$testsrc
echo '#ifdef __GNUC__' >>$testsrc
echo '    return 0;' >>$testsrc
echo '#endif' >>$testsrc
echo '    return 1;' >>$testsrc
echo '}' >>$testsrc
run_test && cc_is_gcc=true || cc_is_gcc=false

$cc_is_gcc && echo 'compiler is gcc or compatible'
echo "optimizations: $opt"
echo "debug symbols: $dbg"
echo "install prefix: $prefix"

cfgmk=config.mk
echo "# Generated by: $0 $*" >$cfgmk
echo "PREFIX = $prefix" >>$cfgmk
echo "libdir = $libdir" >>$cfgmk
echo 'src =' `ls src/*.c | sort` >>$cfgmk
echo >>$cfgmk
$opt && echo 'opt = -O3' >>$cfgmk
$dbg && echo 'dbg = -g' >>$cfgmk

if $cc_is_gcc; then
	echo 'warn = -pedantic -Wall -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast' >>$cfgmk
	echo 'dep = -MMD' >>$cfgmk
fi

echo >>$cfgmk

if [ "$sys" = mingw ]; then
	# windows/mingw
	echo 'libso = libmeshfile.dll' >>$cfgmk
	echo 'shared = -shared' >>$cfgmk

elif [ "$sys" = Darwin ]; then
	# macosx
	echo 'libso = libmeshfile.dylib' >>$cfgmk
	echo 'shared = -dynamiclib' >>$cfgmk

else
	# other UNIX
	echo 'ldname = libmeshfile.so' >>$cfgmk
	echo 'soname = $(ldname).$(somajor)' >>$cfgmk
	echo 'libso = $(ldname).$(somajor).$(sominor)' >>$cfgmk
	echo 'shared = -shared -Wl,-soname,$(soname)' >>$cfgmk
	echo 'pic = -fPIC' >>$cfgmk
fi


[ -n "$CFLAGS" ] && echo "CFLAGS_cfg = $CFLAGS" >>$cfgmk
[ -n "$LDFLAGS" ] && echo "LDFLAGS_cfg = $LDFLAGS" >>$cfgmk

exit 0