configure

#!/bin/sh
# Usage: ./configure [install prefix]

check_pkg() {
	PKG=$1

	echo "pkg-config ${PKG}"
	pkg-config $PKG
	RET=$?
	if [ "${RET}" -eq 127 ] ; then
		echo "You need to have pkg-config."
		exit 1
	elif [ "${RET}" -ne 0 ] ; then
		echo "You need to have '${PKG}' package installed."
		if [ "${PKG_CONFIG_PATH}" != "" ] ; then
			echo "PKG_CONFIG_PATH=${PKG_CONFIG_PATH}"
		else
			echo "Note: PKG_CONFIG_PATH is not set."
		fi
		exit 1
	fi
}

prefix=/usr/local
if [ "$#" -eq 1 ] ; then prefix=$1 ; fi
echo "prefix=${prefix}"

SYSTEM_CFLAGS=
case $(uname) in
	Linux )
		SYSTEM_CFLAGS=-D_POSIX_C_SOURCE=200809L
		SYSTEM_LDFLAGS=
	;;
	OpenBSD )
		SYSTEM_CFLAGS=
		SYSTEM_LDFLAGS=
	;;
esac
echo "system: $(uname)"
echo "SYSTEM_CFLAGS=" ${SYSTEM_CFLAGS}

PKGS="x11"
for a in ${PKGS} ; do
	check_pkg $a
done

PKGS_CFLAGS=$(pkg-config ${PKGS} --cflags)
PKGS_LDFLAGS=$(pkg-config ${PKGS} --libs)
echo "PKGS_CFLAGS=${PKGS_CFLAGS}"
echo "PKGS_LDFLAGS=${PKGS_LDFLAGS}"

echo "create: Makefile"
echo '# Automatically generated from Makefile.in by configure' >Makefile
echo >>Makefile
sed \
	-e "s|@prefix@|${prefix}|g" \
	-e "s|@PKGS_CFLAGS@|${PKGS_CFLAGS}|g" \
	-e "s|@PKGS_LDFLAGS@|${PKGS_LDFLAGS}|g" \
	-e "s|@SYSTEM_CFLAGS@|${SYSTEM_CFLAGS}|g" \
	-e "s|@SYSTEM_LDFLAGS@|${SYSTEM_LDFLAGS}|g" \
	Makefile.in >>Makefile