configure.in

dnl Process this file with autoconf to produce a configure script.
AC_INIT(README)

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=1
MINOR_VERSION=2
MICRO_VERSION=5
INTERFACE_AGE=4
BINARY_AGE=5
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 build and host environments
AC_CANONICAL_HOST

dnl Setup for automake
AM_INIT_AUTOMAKE(SDL_image, $VERSION)

dnl Check for tools

AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_C_INLINE
AC_PROG_INSTALL

dnl The alpha architecture needs special flags for binary portability
case "$host" in
    alpha*-*-linux*)
        CFLAGS="$CFLAGS -mcpu=ev4 -Wa,-mall"
        ;;
    *-*-beos*)
        ac_default_prefix=/boot/develop/tools/gnupro
        ;;
    *-*-cygwin* | *-*-mingw32*)
        if test "$build" != "$host"; then # cross-compiling
            # Default cross-compile location
            ac_default_prefix=/usr/local/cross-tools/i386-mingw32msvc
        else
            # Look for the location of the tools and install there
            if test "$BUILD_PREFIX" != ""; then
                ac_default_prefix=$BUILD_PREFIX
            fi
        fi
        ;;
esac

dnl 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 $SDL_LIBS"
saved_LIBS="$LIBS"

dnl Check command-line options
AC_ARG_ENABLE([bmp], [AC_HELP_STRING([--enable-bmp], [support loading BMP images [default=yes]])],
 [], [enable_bmp=yes])
AC_ARG_ENABLE([gif], [AC_HELP_STRING([--enable-gif], [support loading GIF images [default=yes]])],
 [], [enable_gif=yes])
AC_ARG_ENABLE([jpg], [AC_HELP_STRING([--enable-jpg], [support loading JPG images [default=yes]])],
 [], [enable_jpg=yes])
AC_ARG_ENABLE([lbm], [AC_HELP_STRING([--enable-lbm], [support loading LBM images [default=yes]])],
 [], [enable_lbm=yes])
AC_ARG_ENABLE([pcx], [AC_HELP_STRING([--enable-pcx], [support loading PCX images [default=yes]])],
 [], [enable_pcx=yes])
AC_ARG_ENABLE([png], [AC_HELP_STRING([--enable-bmp], [support loading PNG images [default=yes]])],
 [], [enable_png=yes])
AC_ARG_ENABLE([pnm], [AC_HELP_STRING([--enable-pnm], [support loading PNM images [default=yes]])],
 [], [enable_pnm=yes])
AC_ARG_ENABLE([tga], [AC_HELP_STRING([--enable-tga], [support loading TGA images [default=yes]])],
 [], [enable_tga=yes])
AC_ARG_ENABLE([tif], [AC_HELP_STRING([--enable-tif], [support loading TIFF images [default=no]])],
 [], [enable_tif=no])
AC_ARG_ENABLE([xcf], [AC_HELP_STRING([--enable-xcf], [support loading XCF images [default=yes]])],
 [], [enable_xcf=yes])
AC_ARG_ENABLE([xpm], [AC_HELP_STRING([--enable-xpm], [support loading XPM images [default=yes]])],
 [], [enable_xpm=yes])
AC_ARG_ENABLE([xv], [AC_HELP_STRING([--enable-xv], [support loading XV images [default=yes]])],
 [], [enable_xv=yes])

if test x$enable_png = xyes || x$enable_tif = xyes; then
    AC_CHECK_LIB([z], [uncompress], [
        LIBS="-lz $LIBS"
        IMG_LIBS="-lz $IMG_LIBS"
    ])
fi

if test x$enable_jpg = xyes || x$enable_tif = xyes; then
    AC_CHECK_LIB([jpeg], [jpeg_CreateDecompress], [have_libjpeg=yes])
    if test x$have_libjpeg = xyes; then
        if test x$enable_jpg = xyes; then
            AC_DEFINE(LOAD_JPG)
        fi
        LIBS="-ljpeg $LIBS"
        IMG_LIBS="-ljpeg $IMG_LIBS"
    elif test x$enable_jpg = xyes; then
        AC_MSG_WARN([*** Unable to find JPEG library (http://www.ijg.org/)])
        AC_MSG_WARN([JPG image loading disabled])
    fi
fi

if test x$enable_png = xyes; then
    AC_CHECK_LIB([png], [png_create_read_struct], [have_libpng=yes])
    if test x$have_libpng = xyes; then
        AC_DEFINE([LOAD_PNG])
        IMG_LIBS="-lpng $IMG_LIBS"
    else
        AC_MSG_WARN([*** Unable to find PNG library (http://www.libpng.org/pub/png/libpng.html)])
        AC_MSG_WARN([PNG image loading disabled])
    fi
fi

if test x$enable_tif = xyes; then
    AC_CHECK_LIB([tiff], [TIFFClientOpen], [have_libtiff=yes])
    if test x$have_libtiff = xyes; then
        AC_DEFINE([LOAD_TIF])
        IMG_LIBS="-ltiff $IMG_LIBS"
    else
        AC_MSG_WARN([*** Unable to find Tiff library (ftp://ftp.sgi.com/graphics/tiff/)])
        AC_MSG_WARN([TIF image loading disabled])
    fi
fi

if test x$enable_bmp = xyes; then
    AC_DEFINE([LOAD_BMP])
fi

if test x$enable_gif = xyes; then
    AC_DEFINE([LOAD_GIF])
fi

if test x$enable_lbm = xyes; then
    AC_DEFINE([LOAD_LBM])
fi

if test x$enable_pcx = xyes; then
    AC_DEFINE([LOAD_PCX])
fi

if test x$enable_pnm = xyes; then
    AC_DEFINE([LOAD_PNM])
fi

if test x$enable_tga = xyes; then
    AC_DEFINE([LOAD_TGA])
fi

if test x$enable_xcf = xyes; then
    AC_DEFINE([LOAD_XCF])
fi

if test x$enable_xpm = xyes; then
    AC_DEFINE([LOAD_XPM])
fi

if test x$enable_xv = xyes; then
    AC_DEFINE([LOAD_XV])
fi

LIBS="$saved_LIBS"

AC_SUBST([IMG_LIBS])

# Finally create all the generated files
AC_OUTPUT([
Makefile
SDL_image.spec
SDL_image.qpg
])