dnl Process this file with autoconf to produce a configure script.
AC_INIT(mgstat.c)

VERSION="0.12"
PACKAGGE=mgstat
AC_SUBST(VERSION)
AC_SUBST(PACKAGE)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADER(fcntl.h, ,
		AC_MSG_ERROR([Header file missing. Aborting..]))
AC_CHECK_HEADER(unistd.h, ,
		AC_MSG_ERROR([Header file missing. Aborting..]))
AC_CHECK_HEADER(sys/types.h, ,
		AC_MSG_ERROR([Header file missing. Aborting..]))
AC_CHECK_HEADER(sys/stat.h, ,
		AC_MSG_ERROR([Header file missing. Aborting..]))
AC_CHECK_HEADERS(math.h assert.h, ,
		AC_MSG_ERROR([Header file missing. Aborting..]))

dnl Checking for gd header files.
AC_CHECKING([Looking for a GD library header files])
AC_FIND_PATH(GD_INCLUDE, gd.h, , /usr/include /usr/include/gd /usr/local/include /usr/local/include/gd /include /include/gd /usr/pkg/include)

AC_CHECK_HEADER(${GD_INCLUDE}/gdfonts.h, ,
		AC_MSG_WARN([GD library header file missing.]) )
AC_CHECK_HEADER(${GD_INCLUDE}/gdfontmb.h, ,
		AC_MSG_WARN([GD library header file missing.]) )
if test "$GD_INCLUDE" = ""; then
	AC_MSG_WARN([GD headers not found])
else
	CFLAGS="-I${GD_INCLUDE} ${CFLAGS}"
	HAVE_GD="1"
fi

dnl Checks for typedefs, structures, and compiler characteristics.

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_CHECK_FUNCS(errx snprintf)

AC_CHECK_LIB(m, main, LIBS="-lm ${LIBS}")
AC_CHECK_LIB(jpeg, main, LIBS="-ljpeg ${LIBS}")
AC_CHECK_LIB(png,  main, LIBS="-lpng ${LIBS}")
AC_CHECK_LIB(freetype, main, LIBS="-lfreetype ${LIBS}")

if test "$GD_INCLUDE" != ""; then
	HAVE_GD=""
	AC_FIND_PATH(LIB_PNG, libpng.a, , /lib /usr/lib /usr/local/lib /usr/pkg/lib)
	AC_FIND_PATH(LIB_GD, libgd.a, , /lib /usr/lib /usr/local/lib /lib/gd /usr/lib/gd /usr/local/lib/gd /usr/pkg/lib)
	if test "$LIB_GD" = ""; then
		AC_MSG_WARN([GD library not found yet.])
	fi
	LIBS="-lgd ${LIBS}"
	if test "$LIB_PNG" != ""; then
		LDFLAGS="-L${LIB_PNG} ${LDFLAGS}"
	fi
	if test "$LIB_GD" != ""; then
		LDFLAGS="-L${LIB_GD} ${LDFLAGS}"
	fi
	AC_CHECK_LIB(gd, gdImageGif, [AC_DEFINE(HAVE_GD_GIF) AC_DEFINE(HAVE_GD) HAVE_GD_GIF=1 HAVE_GD=1], AC_MSG_WARN([No support for gif files in GD library]))
	if test "$HAVE_GD_GIF" = ""; then
		AC_CHECK_LIB(gd, gdImagePng, [AC_DEFINE(HAVE_GD_PNG) AC_DEFINE(HAVE_GD) HAVE_GD_PNG=1 HAVE_GD=1 LIBS="-lpng ${LIBS}"], AC_MSG_WARN([No support for png in GD library]),"-lpng")
	fi
fi
AC_OUTPUT(Makefile)

if test "$HAVE_GD_GIF" != ""; then
	echo
	echo "GD library has support for gif format."
	echo "Mgstat will produce graphics."
	echo "Now you can type 'make' and 'make install'"
	echo
fi
if test "$HAVE_GD_PNG" != ""; then
	echo
	echo "GD library has support for png format."
	echo "Mgstat will produce graphics."
	echo "Now you can type 'make' and 'make install'"
	echo
fi

if test "$HAVE_GD" = ""; then
	echo
	echo "GD library not found. Mgstat will run but won't produce graphics."	
	echo "Please get GD library from http://www.boutell.com/gd"
	echo "Now, you can type 'make' and 'make install'"
echo
fi