#!/usr/bin/env perl 

# This is the script that builds the Makefile for SDL Perl under Mac OS X.
# It was heavily adapted from the Makefile.darwin that was included 
# in the Mac OS X port of Frozen Bubble by bob@redivi.com. More details 
# about this and other modified files can be found in the README.macosx file.
# 
# Written by Thomas Tongue <ttongue@imagiware.com>

use strict;
use ExtUtils::MakeMaker;
use Getopt::Long;

#
# Configure SDL proper
#

use vars qw/ $sdl_cflags $sdl_libs @dirs $inc_flags %ext @defs /;

#
# Configuration detection 
#

# This is really annoying, but the SDL frameworks for Mac OS X do not supply
# an sdl-cflags binary to supply these arguments, so the choices are to
# either hard-code the include paths (as done below), or build the SDL libs
# from scratch. Having done both, hard-coding is *much* better. -TT


$sdl_cflags = "-I/System/Library/Frameworks/SDL.framework/Headers ".
              "-I/System/Library/Frameworks/SDL_mixer.framework/Headers ".
              "-I/System/Library/Frameworks/SDL_image.framework/Headers ".
              "-I/System/Library/Frameworks/SDL_ttf.framework/Headers ".
              "-I/System/Library/Frameworks/OpenGL.framework/Headers ".
              "-I../../include ".
#              "-I../../include/smpeg ".
#              "-I/System/Library/Frameworks/smpeg.framwork/Headers ",
              "-D_THREAD_SAFE";
$sdl_libs = "-L/System/Library/Frameworks/OpenGL.framework/Libraries ".
            "-L../../lib";

#
# Search paths
#

@dirs=(
	'/usr/local/include/SDL', 
	'/usr/local/include',
	'/usr/local/include/smpeg',
	'/usr/include/SDL',
	'/usr/include',
	'/usr/include/smpeg',
	'/usr/local/include/GL',
	'/usr/local/include/gl',
	'/usr/include/GL', 
	'/usr/include/gl', 
        '/System/Library/Frameworks/OpenGL.framework/Headers',
        '/System/Library/Frameworks/SDL.framework/Headers',
        '/System/Library/Frameworks/SDL_mixer.framework/Headers',
        '/System/Library/Frameworks/SDL_image.framework/Headers',
        '/System/Library/Frameworks/SDL_ttf.framework/Headers',
#        '/System/Library/Frameworks/smpeg.framework/Headers',
	'../../include', 
#	'../../include/smpeg', 
);

$inc_flags = "-ggdb " . $ENV{DEBUG};

#
# Registed extensions
#

%ext = ( 
	SDL_image => { inc => 'HAVE_SDL_IMAGE', test => 'SDL_image.h' },
	SDL_mixer => { inc => 'HAVE_SDL_MIXER', test => 'SDL_mixer.h' },
	SDL_net => { inc => 'HAVE_SDL_NET', test => 'SDL_net.h' },
	SDL_ttf => { inc => 'HAVE_SDL_TTF', test => 'SDL_ttf.h' },
	SDL_gfx => { inc => 'HAVE_SDL_GFX', test => 'SDL_gfxPrimitives.h' },
	SDL_console => { inc => 'HAVE_SDL_CONSOLE', test => 'CON_console.h' },
	png => { inc => 'HAVE_PNG', test => 'png.h' },
	jpeg => { inc => 'HAVE_JPEG', test => 'jpeglib.h' },
	GL => { inc => 'HAVE_GL', test => 'gl.h' },
	GLU => { inc => 'HAVE_GLU', test => 'glu.h' },
	smpeg => { inc => 'HAVE_SMPEG', test => 'smpeg.h' },
);

#
# Locate optional packages
#

my ($e,$d);
for $e ( keys %ext ) {
	for $d (@dirs) {
		$ext{$e}{exists} ||= -e "$d/$ext{$e}{test}" 
	}
}

my $usage;
for $e ( keys %ext ) {
	$usage .= "\n\t-$e disables $e support";
}

for $e ( @ARGV ) {
	my $o;
	($o = $e) =~ s/^-*//g;
	die "./configure $usage\n" unless exists $ext{$o}; 
	print "Disabling $o\n";
	$ext{$o}{exists} = 0;
}
	
sub found_mod {
	printf "%-24s%s\n", "Enabled $_[0]",  ( $_[1] ? "yes" : "no" );
}

for $e ( sort keys %ext ) {
	found_mod ($e,$ext{$e}{exists});
}

#
# Get GLU version
#

if  ( $ext{GLU}{exists} ) {
	print "Detecting GLU Version\n";
	my $cmd="gcc -o detect detect.c $sdl_cflags -DMACOSX -lGLU -lGL $sdl_libs";
	system ($cmd);
	my $version = `./detect` * 10;
	push @defs, "-DHAVE_GLU_VERSION=$version";
	system ("rm detect");
}


#
# Specify Makefile options
#

my %options = (
    'NAME'	=> 'SDL_perl',
    'VERSION_FROM' => 'SDL.pm', 
    'LIBS'	=> [ join( " ",	"$sdl_libs", 
			map { $ext{$_}{exists} ? "-l$_" : '' } (sort keys %ext),
			)
		],  
    'DEFINE'	=> join ( " ", "-Ddarwin","-DMACOSX",@defs, map { $ext{$_}{exists} ? "-D$ext{$_}{inc}" : '' } sort keys %ext),
    'INC'	=> "$inc_flags $sdl_cflags " . join(" ", map { "-I$_" } @dirs),
    'OBJECT'	=> (	
			 ($ext{SDL_image}{exists} ? 'SFont.o ' : "") .
			 'SDL_perl.o ' .
			 'SDL_macosx.o ' .
			 ($ext{GL}{exists} ? 'OpenGL.o ' : "") 
		),
    'dynamic_lib'   => {'OTHERLDFLAGS' => '-framework AppKit -framework SDL -framework SDL_image -framework SDL_mixer -framework SDL_ttf -framework OpenGL  -ljpeg -lpng -lvorbisfile '},
);
    
#
# Write Makefile 
#

WriteMakefile(%options );
open FILE, ">>Makefile";
print FILE 'SDL_macosx$(OBJ_EXT): SDL_macosx.m';
close FILE;