dnl Process this file with autoconf to produce a configure script.

dnl initialisation
AC_INIT(src/gltron.c)
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AM_INIT_AUTOMAKE(gltron, 0.70)

AC_PREFIX_DEFAULT("/usr/local")

dnl AM_MAINTAINER_MODE

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CXX
AC_PROG_CPP
AC_PROG_RANLIB

dnl CFLAGS set-up
CFLAGS="-DSEPARATOR=\"'/'\"" 
dnl CFLAGS="-ansi -pedantic"
dnl CXXFLAGS=""
dnl CPPFLAGS=""

AC_ARG_ENABLE(warn,
AC_HELP_STRING([--enable-warn],[Enable compiler warnings @<:@default=on@:>@]),
	enable_warn=$enableval, enable_warn=yes)
if test "x$enable_warn" = xyes; then
	CFLAGS="$CFLAGS -Wall -Werror"
fi

AC_ARG_ENABLE(debug,
AC_HELP_STRING([--enable-debug],[Enable debugging @<:@default=off@:>@]),
	enable_debug=$enableval, enable_debug=off)
if test "x$enable_debug" = xyes; then
	CFLAGS="$CFLAGS -g3"
	CXXFLAGS="$CXXFLAGS -g3"
fi

AC_ARG_ENABLE(profile,
AC_HELP_STRING([--enable-profile],[Enable profiling @<:@default=off@:>@]),
	enable_profile=$enableval, enable_profile=off)
if test "x$enable_profile" = xyes; then
	if test "x$GCC" = xyes; then
		CFLAGS="$CFLAGS -pg"
	else
		CFLAGS="$CFLAGS -p"
	fi
fi

AC_ARG_ENABLE(optimize,
AC_HELP_STRING([--enable-optimize=@<:@level@:>@],[Enable optimization @<:@default=s@:>@]),
	enable_optmize=$enableval, enable_optimize=s)
dnl this is always true
if test "x$enable_optimize" ; then
	CFLAGS="$CFLAGS -O$enable_optimize"
	CXXFLAGS="$CXXFLAGS -O$enable_optimize"
fi

dnl library checks
AM_PATH_SDL(1.1.0, CFLAGS="$CFLAGS $SDL_CFLAGS"; CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"; LIBS="$LIBS $SDL_LIBS",
	AC_MSG_ERROR(SDL is not installed))
AC_CHECK_LIB(GL, main,, AC_MSG_ERROR(OpenGL is not installed))
dnl AC_CHECK_LIB(opengl32, main,, AC_MSG_ERROR(OpenGL is not installed))
AC_CHECK_LIB(z, gzopen,, AC_MSG_ERROR(libz is not installed))
AC_CHECK_LIB(png, png_read_info,, AC_MSG_ERROR(libpng is not installed))

dnl local data dir setup
AC_ARG_ENABLE(localdata,
AC_HELP_STRING([--enable-localdata],[Use local data directory @<:@default=no@:>@]),
	CPPFLAGSA="$CPPFLAGSA -DLOCAL_DATA",
	CPPFLAGSA="$CPPFLAGSA -DDATA_DIR=\\\"\$(datadir)/\$(PACKAGE)\\\"")

dnl snapshot dir setup
AC_ARG_WITH(snapshot-dir,
AC_HELP_STRING([--with-snapshot-dir=@<:@path@:>@],[Snapshot directory @<:@default=~@:>@]),
	CPPFLAGSA="$CPPFLAGSA -DSNAP_DIR=\\\"$withval\\\"",
	CPPFLAGSA="$CPPFLAGSA -DSNAP_DIR=\\\"~\\\"")

dnl preferences dir setup
AC_ARG_WITH(preferences-dir,
AC_HELP_STRING([--with-preferences-dir=@<:@path@:>@],[Preferences directory @<:@default=~@:>@]),
	CPPFLAGSA="$CPPFLAGSA -DPREF_DIR=\\\"$withval\\\"",
	CPPFLAGSA="$CPPFLAGSA -DPREF_DIR=\\\"~\\\"")

dnl sound set-up
AC_ARG_ENABLE(sound,
AC_HELP_STRING([--disable-sound],[Don't compile in sound @<:@default=off@:>@]),
   use_sound=no, use_sound=yes)
if test "x$use_sound" = xyes; then
	AC_CHECK_LIB(smpeg, main,, AC_MSG_WARN(smpeg not found - music playback may not work correctly))
	AC_CHECK_LIB(ogg, main,, AC_MSG_WARN(ogg not found - music playback may not work correctly))
	AC_CHECK_LIB(vorbis, main,, AC_MSG_WARN(vorbis not found - music playback may not work correctly))
	AC_CHECK_LIB(vorbisfile, main,, AC_MSG_WARN(vorbisfile not found - music playback may not work correctly))
	AC_CHECK_LIB(smpeg, main,, AC_MSG_WARN(smpeg not found - music playback may not work correctly))
	AC_CHECK_LIB(mikmod, main,, AC_MSG_WARN(mikmod not found - music playback may not work correctly))
	AC_CHECK_LIB(SDL_sound, Sound_Init,
		LIBS="-lSDL_sound $LIBS";
		SOUND_OBJS="sound.o sound_glue.o Source.o Source3D.o SourceMusic.o SourceSample.o SoundSystem.o SourceCopy.o SourceEngine.o",
		AC_MSG_WARN(SDL_sound not found - disabling sound);
		SOUND_OBJS="sound_stubs.o sound_glue_stubs.o")
	
	AC_SUBST(SOUND_OBJS)
else
	SOUND_OBJS="sound_stubs.o sound_glue_stubs.o"
	AC_SUBST(SOUND_OBJS)
fi

dnl network set-up
AC_ARG_ENABLE(network,
AC_HELP_STRING([--enable-network],[Experimental network mode @<:@default=off@:>@]),
	enable_network=$enableval, enable_network=off)
if test "x$enable_network" = xyes; then
	AC_CHECK_LIB(SDL_net, SDLNet_Init,
	CFLAGS="$CFLAGS -DNETWORK";
	LIBS="$LIBS -lSDL_net";
	NETWORK_OBJS="network.o system_net.o",
	AC_MSG_WARN(SDL_net not found - disabling network))
	AC_SUBST(NETWORK_OBJS)
fi

dnl CXXFLAGS="$CFLAGS"

dnl header checks
AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h)

AC_CHECK_HEADERS(GL/gl.h, have_gl_h=true, have_gl_h=false)
$have_gl_h || {
	AC_CHECK_HEADERS(/usr/X11R6/include/GL/gl.h, includes_in_x=1 have_gl_h=true, have_gl_h=false)
}
$have_gl_h || {
	AC_CHECK_HEADERS(/usr/local/include/GL/gl.h, includes_in_local=1 have_gl_h=true, have_gl_h=false)
}
$have_gl_h || {
	AC_MSG_ERROR(cant find GL headers)
}

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST

dnl Checks for library functions.
AC_CHECK_FUNCS(strstr mkstemp)

CPPFLAGS="$CPPFLAGS $CPPFLAGSA"

AC_OUTPUT([Makefile \
	lua/Makefile \
	lua/include/Makefile \
	lua/src/Makefile \
	lua/src/lib/Makefile \
	nebu/Makefile \
	nebu/include/Makefile \
	nebu/include/audio/Makefile \
	nebu/include/base/Makefile \
	nebu/include/filesystem/Makefile \
	nebu/include/input/Makefile \
	nebu/include/scripting/Makefile \
	nebu/include/video/Makefile \
	nebu/base/Makefile \
	nebu/filesystem/Makefile \
	nebu/scripting/Makefile \
	nebu/input/Makefile \
	nebu/video/Makefile \
	nebu/audio/Makefile
	src/Makefile \
	src/include/Makefile \
	src/include/audio/Makefile \
	src/include/base/Makefile \
	src/include/configuration/Makefile \
	src/include/filesystem/Makefile \
	src/include/game/Makefile \
	src/include/input/Makefile \
	src/include/scripting/Makefile \
	src/include/video/Makefile \
	src/base/Makefile \
	src/filesystem/Makefile \
	src/configuration/Makefile \
	src/audio/Makefile \
	src/video/Makefile \
	src/input/Makefile \
	src/game/Makefile \
	art/Makefile \
	art/default/Makefile \
	data/Makefile \
	music/Makefile \
	scripts/Makefile \
	])