#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ(2.57)
AC_INIT(SDL_console)
AC_CONFIG_SRCDIR([README])
AC_CONFIG_HEADER([config.h])

dnl Set various version strings - taken gratefully from the GTk sources

# Making releases:
#   MICRO_VERSION += 1;
#   INTERFACE_AGE += 1;
#   BINARY_AGE += 1;
# if any functions have been added, set INTERFACE_AGE to 0.
# if backwards compatibility has been broken,
# set BINARY_AGE and INTERFACE_AGE to 0.

MAJOR_VERSION=2
MINOR_VERSION=1
MICRO_VERSION=0
INTERFACE_AGE=0
BINARY_AGE=0
VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION

AC_SUBST(MAJOR_VERSION)
AC_SUBST(MINOR_VERSION)
AC_SUBST(MICRO_VERSION)
AC_SUBST(INTERFACE_AGE)
AC_SUBST(BINARY_AGE)
AC_SUBST(VERSION)

# libtool versioning
LT_RELEASE=$MAJOR_VERSION.$MINOR_VERSION
LT_CURRENT=`expr $MICRO_VERSION - $INTERFACE_AGE`
LT_REVISION=$INTERFACE_AGE
LT_AGE=`expr $BINARY_AGE - $INTERFACE_AGE`

AC_SUBST(LT_RELEASE)
AC_SUBST(LT_CURRENT)
AC_SUBST(LT_REVISION)
AC_SUBST(LT_AGE)

dnl Detect the canonical host and target build environment
AC_CANONICAL_HOST
AC_CANONICAL_TARGET

dnl Setup for automake
AM_INIT_AUTOMAKE(SDL_console, $VERSION)
AM_MAINTAINER_MODE

dnl Check for tools

AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_C_INLINE
AC_PROG_INSTALL
AC_PROG_LN_S

# Check for SDL
SDL_VERSION=1.2.4
AM_PATH_SDL($SDL_VERSION,
		  :,
	AC_MSG_ERROR([*** SDL version $SDL_VERSION not found!])
)
CFLAGS="$CFLAGS $SDL_CFLAGS"
LIBS="$LIBS $SDL_LIBS"

# Check command-line options
AC_ARG_ENABLE(sdlimage,
AC_HELP_STRING(--enable-sdlimage,support SDL_image (default=yes)),
,
enable_sdlimage=yes)
if test x$enable_sdlimage = xyes; then
	AC_CHECK_LIB([SDL_image], [IMG_Load],have_sdlimage=yes)
	if test x$have_sdlimage = xyes; then
	  CFLAGS="$CFLAGS -DHAVE_SDLIMAGE"
	  CON_LIBS="$CON_LIBS -lSDL_image"
	  LIBS="$LIBS $CON_LIBS"
	else
	  enable_sdlimage=no
	fi
fi
AC_SUBST(CON_LIBS)


AC_ARG_ENABLE(gldemo,
AC_HELP_STRING(--enable-opengl,enable OpenGL support for the example (default=yes)),
,
enable_gldemo=yes)
if test x$enable_gldemo = xyes; then
	have_opengl=yes
	AC_CHECK_LIB([GL], [glLoadIdentity],have_gl=yes,have_opengl=no)
	AC_CHECK_LIB([GLU], [gluPerspective],have_glu=yes,have_opengl=no,-lGL)
	AC_CHECK_LIB([glut], [glutSolidTeapot],have_glut=yes,have_opengl=no,-lGL -lGLU)
	if test x$have_opengl = xyes; then
	  EXAMPLE_LIBS="$EXAMPLE_LIBS -lGL -lGLU -lglut"
	else
	  enable_gldemo=no
	fi
fi
AC_SUBST(EXAMPLE_LIBS)
AM_CONDITIONAL(HAVE_OPENGL,test x$enable_gldemo = xyes)

#What is that thing used for anyway???
# FIXME: Replace `main' with a function in `-lm':
#AC_CHECK_LIB([m], [main])

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([stdlib.h string.h])

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

# Checks for library functions.
AC_FUNC_MALLOC
AC_CHECK_FUNCS([atexit memset strdup])

AC_CONFIG_FILES([Makefile
                 src/Makefile
                 include/Makefile
				 example/Makefile])
AC_OUTPUT

# Print some useful information
echo
echo "Configuration:"
echo "   Target system type: $target"
echo "   Build static library: $enable_static"
echo "   Build shared library: $enable_shared"
echo "   Build with SDL_image: $enable_sdlimage"
echo "   Build OpenGL Demos: $enable_gldemo"
echo
echo "   Headers will be installed in $prefix/include"
echo "   Libraries will be installed in $prefix/lib"
echo