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

AC_INIT(README)

dnl Detect the canonical build and host environments

AC_CONFIG_AUX_DIRS($srcdir/../build-scripts)

AC_CANONICAL_HOST

dnl Check for tools

AC_PROG_CC

dnl Check for compiler environment

AC_C_CONST

dnl Figure out which math library to use

case "$host" in

    *-*-cygwin* | *-*-mingw32*)

        EXE=".exe"

        MATHLIB=""

        SYS_GL_LIBS="-lopengl32"

        ;;

    *-*-beos*)

        EXE=""

        MATHLIB=""

        SYS_GL_LIBS="-lGL"

        ;;

    *-*-darwin* )

        EXE=""

        MATHLIB=""

        SYS_GL_LIBS="-Wl,-framework,OpenGL"

        ;;

    *-*-aix*)

        EXE=""

        if test x$ac_cv_prog_gcc = xyes; then

            CFLAGS="-mthreads"

        fi

        SYS_GL_LIBS=""

        ;;

    *-*-mint*)

        EXE=""

        MATHLIB=""

        AC_PATH_PROG(OSMESA_CONFIG, osmesa-config, no)

        if test "x$OSMESA_CONFIG" = "xyes"; then

            OSMESA_CFLAGS=`$OSMESA_CONFIG --cflags`

            OSMESA_LIBS=`$OSMESA_CONFIG --libs`

            CFLAGS="$CFLAGS $OSMESA_CFLAGS"

            SYS_GL_LIBS="$OSMESA_LIBS"

        else

            SYS_GL_LIBS="-lOSMesa"

        fi

        ;;

    *-*-qnx*)

        EXE=""

        MATHLIB=""

        SYS_GL_LIBS="-lGLES_CM"

        ;;

    *)

        EXE=""

        MATHLIB="-lm"

        SYS_GL_LIBS="-lGL"

        ;;

esac

AC_SUBST(EXE)

AC_SUBST(MATHLIB)

dnl Check for SDL

SDL_VERSION=1.3.0

AM_PATH_SDL($SDL_VERSION,

            :,

	    AC_MSG_ERROR([*** SDL version $SDL_VERSION not found!])

)

CFLAGS="$CFLAGS $SDL_CFLAGS"

LIBS="$LIBS $SDL_LIBS"

dnl Check for X11 path, needed for OpenGL on some systems

AC_PATH_X

if test x$have_x = xyes; then

    if test x$ac_x_includes = xno || test x$ac_x_includes = x; then

        :

    else

        CFLAGS="$CFLAGS -I$ac_x_includes"

    fi

    if test x$ac_x_libraries = xno || test x$ac_x_libraries = x; then

        :

    else

        XPATH="-L$ac_x_libraries"

    fi

fi

dnl Check for OpenGL

AC_MSG_CHECKING(for OpenGL support)

have_opengl=no

AC_TRY_COMPILE([

 #include "SDL_opengl.h"

],[

],[

have_opengl=yes

])

AC_MSG_RESULT($have_opengl)

dnl Check for OpenGL ES

AC_MSG_CHECKING(for OpenGL ES support)

have_opengles=no

AC_TRY_COMPILE([

 #if defined (__QNXNTO__)

    #include <GLES/gl.h>

 #elif defined (__IPHONEOS__)

    #include <OpenGLES/ES1/gl.h>

 #else

    #error "No OpenGL ES support"

 #endif /* __QNXNTO__ */

],[

],[

have_opengles=yes

])

AC_MSG_RESULT($have_opengles)

if test x$have_opengl = xyes; then

    CFLAGS="$CFLAGS -DHAVE_OPENGL"

    GLLIB="$XPATH $SYS_GL_LIBS"

elif test x$have_opengles = xyes; then

    CFLAGS="$CFLAGS -DHAVE_OPENGLES"

    GLLIB="$XPATH $SYS_GL_LIBS"

else

    GLLIB=""

fi

AC_SUBST(GLLIB)

dnl Finally create all the generated files

AC_OUTPUT([Makefile])