AC_INIT(synth2d, 1.1.1, taw27@cam.ac.uk)
VERSION=AC_PACKAGE_VERSION

AM_CONFIG_HEADER(config.h)
AM_INIT_AUTOMAKE(synth2d, "$VERSION")

AC_PROG_CC
AC_PROG_AWK
AC_PROG_INSTALL
AC_PROG_LN_S

AC_HEADER_STDC
AC_CHECK_HEADERS([fcntl.h stdlib.h string.h unistd.h])
AC_C_CONST
AC_FUNC_MALLOC
AC_FUNC_FORK
AC_HEADER_SYS_WAIT
AC_TYPE_SIGNAL
AC_TYPE_PID_T
AC_CHECK_FUNCS([strdup])
AC_CHECK_FUNCS([floor])
AC_CHECK_FUNCS([pow])
AC_CHECK_FUNCS([rint])
AC_CHECK_FUNCS([sqrt])
AC_CHECK_FUNCS([bzero])
AC_TYPE_SIZE_T

if test -z "$PKG_CONFIG"; then
   AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
fi
if test "$PKG_CONFIG" = "no" ; then
   echo "*** pkg-config not found"
fi

AM_PATH_GTK_2_0(2.0.0,,AC_MSG_ERROR([
*** GTK+ 2.6.0 or above is required by Synth2D but no GTK+2 was found.
*** Please make sure you have the GTK+
*** development files installed. The latest version of GTK+ is
*** always available at http://www.gtk.org/.]))

AC_MSG_CHECKING([GTK version])
if $PKG_CONFIG --atleast-version 2.10.0 gtk+-2.0 ; then
	AC_DEFINE([HAVE_GTK_TEN], [1], [Define to 1 if GTK+ is version 2.10.0 or higher])
	AC_MSG_RESULT([2.10.0 or higher - good])
else
	AC_MSG_RESULT([Lower than 2.10.0 - might be usable if newer than 2.6.0 - let's see...])
	AM_PATH_GTK_2_0(2.6.0,,AC_MSG_ERROR([
*** GTK+2 was found but the version number was too low.
*** GTK+ 2.6.0 or above is required by Synth2D.  Please make sure you have the GTK+
*** development files installed. The latest version of GTK+ is
*** always available at http://www.gtk.org/.]))
fi

AC_MSG_CHECKING([Cairo version 1.2.0])
if $PKG_CONFIG --atleast-version 1.2.0 cairo ; then
	CAIRO_VERSION=`$PKG_CONFIG --modversion cairo`
	CAIRO_CFLAGS=`$PKG_CONFIG --cflags cairo`
	CAIRO_LIBS=`$PKG_CONFIG --libs cairo`
	AC_DEFINE([HAVE_CAIRO], [1], [Define to 1 if Cairo is available])
	AC_MSG_RESULT($CAIRO_VERSION)
else
	AC_MSG_RESULT([not found.  Some functions will be unavailable.])
fi

AM_PATH_GLIB_2_0(2.0.0,,AC_MSG_ERROR("can't find glib"),gthread)

AC_CHECK_LIB([fftw3], [fftw_execute], [],  AC_MSG_ERROR([
       *** fftw3 not found.  fftw3 is required to build Synth2D.]))

AC_CHECK_LIB(m, main)

AC_CHECK_LIB(gslcblas,main, [],  AC_MSG_ERROR([
       *** gslcblas not found.  gslcblas is required to build Synth2D.]))

AC_CHECK_LIB(gsl, main, [],  AC_MSG_ERROR([
       *** gsl not found.  gsl is required to build Synth2D.]))

AC_MSG_CHECKING([libpng])
if $PKG_CONFIG --atleast-version 1.2.0 libpng ; then
        LIBPNG_VERSION=`$PKG_CONFIG --modversion libpng`
        AC_MSG_RESULT($LIBPNG_VERSION)
        LIBPNG_CFLAGS=`$PKG_CONFIG --cflags libpng`
        LIBPNG_LIBS=`$PKG_CONFIG --libs libpng`
else
        AC_MSG_RESULT([Lower than 1.2.0 or not found])
        AC_MSG_ERROR([
*** libPNG is required to build Synth2D])
fi

CFLAGS="$CFLAGS $CAIRO_CFLAGS $LIBPNG_CLAGS"
LIBS="$LIBS $CAIRO_LIBS $LIBPNG_LIBS"

AC_OUTPUT(Makefile src/Makefile data/Makefile)