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:
# Edit include/SDL/SDL_version.h and change the version, then:
#   SDL_MICRO_VERSION += 1;
#   SDL_INTERFACE_AGE += 1;
#   SDL_BINARY_AGE += 1;
# if any functions have been added, set SDL_INTERFACE_AGE to 0.
# if backwards compatibility has been broken,
# set SDL_BINARY_AGE and SDL_INTERFACE_AGE to 0.
#
SDL_MAJOR_VERSION=1
SDL_MINOR_VERSION=2
SDL_MICRO_VERSION=7
SDL_INTERFACE_AGE=7
SDL_BINARY_AGE=7
SDL_VERSION=$SDL_MAJOR_VERSION.$SDL_MINOR_VERSION.$SDL_MICRO_VERSION

AC_SUBST(SDL_MAJOR_VERSION)
AC_SUBST(SDL_MINOR_VERSION)
AC_SUBST(SDL_MICRO_VERSION)
AC_SUBST(SDL_INTERFACE_AGE)
AC_SUBST(SDL_BINARY_AGE)
AC_SUBST(SDL_VERSION)

# libtool versioning
LT_RELEASE=$SDL_MAJOR_VERSION.$SDL_MINOR_VERSION
LT_CURRENT=`expr $SDL_MICRO_VERSION - $SDL_INTERFACE_AGE`
LT_REVISION=$SDL_INTERFACE_AGE
LT_AGE=`expr $SDL_BINARY_AGE - $SDL_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_SYSTEM

dnl Setup for automake
AM_INIT_AUTOMAKE(SDL, $SDL_VERSION)

dnl Check for tools

AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_C_INLINE
AC_C_CONST
AC_PROG_CXX
AC_PROG_INSTALL
AC_FUNC_ALLOCA
ASFLAGS=""
AC_SUBST(ASFLAGS)
CCAS="$CC"
AC_SUBST(CCAS)
CCASFLAGS=""
AC_SUBST(CCASFLAGS)
AM_CONDITIONAL([am__fastdepOBJC], false)

dnl The alpha architecture needs special flags for binary portability
case "$target" in
    alpha*-*-linux*)
        if test x$ac_cv_prog_gcc = xyes; then
            CFLAGS="$CFLAGS -mcpu=ev4 -Wa,-mall"
        fi
        ;;
esac

dnl Add compiler-specific optimization flags

dnl See if the user wants aggressive optimizations of the code
AC_ARG_ENABLE(debug,
[  --enable-debug          Disable aggressive optimizations [default=yes]],
              , enable_debug=yes)
if test x$enable_debug != xyes; then
    if test x$ac_cv_prog_gcc = xyes; then
        CFLAGS="$CFLAGS -fexpensive-optimizations"
        # Ack! This breaks the MMX YV12 conversion on gcc 2.95.2
        # CFLAGS="$CFLAGS -fomit-frame-pointer"
    fi
    case "$target" in
        i486-*-*)
            if test x$ac_cv_prog_gcc = xyes; then
                CFLAGS="$CFLAGS -march=i486"
            fi
            ;;
        i?86-*-*)
            if test x$ac_cv_prog_gcc = xyes; then
                CFLAGS="$CFLAGS -march=pentium -mcpu=pentiumpro"
            fi
            ;;
        *-*-osf*)
            if test x$ac_cv_prog_gcc != xyes; then
                CFLAGS="-g3 -fast -arch host"
            fi
            ;;
    esac
fi

dnl Add verbose warnings by default, and allow ANSI compliance checking
AC_ARG_ENABLE(strict-ansi,
[  --enable-strict-ansi    Enable strict ANSI compliance build [default=no]],
              , enable_strict_ansi=no)
if test x$ac_cv_prog_gcc = xyes; then
    CFLAGS="$CFLAGS -Wall"
    if test x$enable_strict_ansi = xyes; then
        CFLAGS="$CFLAGS -ansi -pedantic -D_XOPEN_SOURCE"
    fi
fi

dnl Initialize the compiler and linker flags for SDL applications

SDL_CFLAGS=""
SDL_LIBS="-lSDL"

dnl Add the math library for the new gamma correction support

case "$target" in
    *-*-cygwin* | *-*-mingw32*)
        MATHLIB=""
        ;;
    *-*-beos*)
        MATHLIB=""
        ;;
    *-*-darwin*)
        MATHLIB=""
        ;;
    *)
        MATHLIB="-lm"
        ;;
esac
SYSTEM_LIBS="$SYSTEM_LIBS $MATHLIB"

dnl Enable/disable various subsystems of the SDL library

AC_ARG_ENABLE(audio,
[  --enable-audio          Enable the audio subsystem [default=yes]],
              , enable_audio=yes)
if test x$enable_audio = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS audio"
    SDL_EXTRALIBS="$SDL_EXTRALIBS audio/libaudio.la"
else
    CFLAGS="$CFLAGS -DDISABLE_AUDIO"
fi
AC_ARG_ENABLE(video,
[  --enable-video          Enable the video subsystem [default=yes]],
              , enable_video=yes)
if test x$enable_video = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS video"
    SDL_EXTRALIBS="$SDL_EXTRALIBS video/libvideo.la"
else
    CFLAGS="$CFLAGS -DDISABLE_VIDEO"
fi
AC_ARG_ENABLE(events,
[  --enable-events         Enable the events subsystem [default=yes]],
              , enable_events=yes)
if test x$enable_video = xyes -a x$enable_events = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS events"
    SDL_EXTRALIBS="$SDL_EXTRALIBS events/libevents.la"
else
    CFLAGS="$CFLAGS -DDISABLE_EVENTS"
fi
AC_ARG_ENABLE(joystick,
[  --enable-joystick       Enable the joystick subsystem [default=yes]],
              , enable_joystick=yes)
if test x$enable_joystick = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS joystick"
    SDL_EXTRALIBS="$SDL_EXTRALIBS joystick/libjoystick.la"
else
    CFLAGS="$CFLAGS -DDISABLE_JOYSTICK"
fi
AC_ARG_ENABLE(cdrom,
[  --enable-cdrom          Enable the cdrom subsystem [default=yes]],
              , enable_cdrom=yes)
if test x$enable_cdrom = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS cdrom"
    SDL_EXTRALIBS="$SDL_EXTRALIBS cdrom/libcdrom.la"
else
    CFLAGS="$CFLAGS -DDISABLE_CDROM"
fi
AC_ARG_ENABLE(threads,
[  --enable-threads        Enable the threading subsystem [default=yes]],
              , enable_threads=yes)
SDL_EXTRADIRS="$SDL_EXTRADIRS thread"
SDL_EXTRALIBS="$SDL_EXTRALIBS thread/libthread.la"
if test x$enable_threads != xyes; then
    CFLAGS="$CFLAGS -DDISABLE_THREADS"
    COPY_ARCH_SRC(src/thread, generic, SDL_systhread.c)
    COPY_ARCH_SRC(src/thread, generic, SDL_systhread_c.h)
    COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex.c)
    COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex_c.h)
    COPY_ARCH_SRC(src/thread, generic, SDL_syssem.c)
    COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
    COPY_ARCH_SRC(src/thread, generic, SDL_syscond.c)
    COPY_ARCH_SRC(src/thread, generic, SDL_syscond_c.h)
fi
AC_ARG_ENABLE(timers,
[  --enable-timers         Enable the timer subsystem [default=yes]],
              , enable_timers=yes)
if test x$enable_timers = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS timer"
    SDL_EXTRALIBS="$SDL_EXTRALIBS timer/libtimer.la"
else
    CFLAGS="$CFLAGS -DDISABLE_TIMERS"
fi
AC_ARG_ENABLE(endian,
[  --enable-endian         Enable the endian subsystem [default=yes]],
              , enable_endian=yes)
if test x$enable_endian = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS endian"
    SDL_EXTRALIBS="$SDL_EXTRALIBS endian/libendian.la"
else
    CFLAGS="$CFLAGS -DDISABLE_ENDIAN"
fi
AC_ARG_ENABLE(file,
[  --enable-file           Enable the file subsystem [default=yes]],
              , enable_file=yes)
if test x$enable_file = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS file"
    SDL_EXTRALIBS="$SDL_EXTRALIBS file/libfile.la"
else
    CFLAGS="$CFLAGS -DDISABLE_FILE"
fi
AC_ARG_ENABLE(cpuinfo,
[  --enable-cpuinfo        Enable the cpuinfo subsystem [default=yes]],
              , enable_cpuinfo=yes)
if test x$enable_cpuinfo = xyes; then
    SDL_EXTRADIRS="$SDL_EXTRADIRS cpuinfo"
    SDL_EXTRALIBS="$SDL_EXTRALIBS cpuinfo/libcpuinfo.la"
else
    CFLAGS="$CFLAGS -DDISABLE_CPUINFO"
fi

dnl See if the OSS audio interface is supported
CheckOSS()
{
    AC_ARG_ENABLE(oss,
[  --enable-oss            support the OSS audio API [default=yes]],
                  , enable_oss=yes)
    if test x$enable_audio = xyes -a x$enable_oss = xyes; then
        AC_MSG_CHECKING(for OSS audio support)
        have_oss=no
        if test x$have_oss != xyes; then
            AC_TRY_COMPILE([
              #include <sys/soundcard.h>
            ],[
              int arg = SNDCTL_DSP_SETFRAGMENT;
            ],[
            have_oss=yes
            ])
        fi
        if test x$have_oss != xyes; then
            AC_TRY_COMPILE([
              #include <soundcard.h>
            ],[
              int arg = SNDCTL_DSP_SETFRAGMENT;
            ],[
            have_oss=yes
            CFLAGS="$CFLAGS -DOSS_USE_SOUNDCARD_H"
            ])
        fi
        AC_MSG_RESULT($have_oss)
        if test x$have_oss = xyes; then
            CFLAGS="$CFLAGS -DOSS_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS dsp"
            AUDIO_DRIVERS="$AUDIO_DRIVERS dsp/libaudio_dsp.la"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS dma"
            AUDIO_DRIVERS="$AUDIO_DRIVERS dma/libaudio_dma.la"
        fi
    fi
}

dnl See if the ALSA audio interface is supported
CheckALSA()
{
    AC_ARG_ENABLE(alsa,
[  --enable-alsa           support the ALSA audio API [default=yes]],
                  , enable_alsa=yes)
    if test x$enable_audio = xyes -a x$enable_alsa = xyes; then
        AC_MSG_CHECKING(for ALSA audio support)
        have_alsa=no
        AC_TRY_COMPILE([
          #include <alsa/asoundlib.h>
        ],[
          #if SND_LIB_VERSION < ((0<<16)|(9<<8)|0)
          #error Your version of ALSA is too old
          #endif
          snd_pcm_t *pcm_handle;
        ],[
        AC_CHECK_LIB(asound, snd_pcm_open, have_alsa=yes)
        ])
        if test x$have_alsa = xyes; then
            CFLAGS="$CFLAGS -DALSA_SUPPORT"
            SYSTEM_LIBS="$SYSTEM_LIBS -lasound"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS alsa"
            AUDIO_DRIVERS="$AUDIO_DRIVERS alsa/libaudio_alsa.la"
        else
            AC_MSG_RESULT($have_alsa)
        fi
    fi
}

dnl Check whether we want to use IRIX 6.5+ native audio or not
CheckDMEDIA()
{
    if test x$enable_audio = xyes; then
        AC_MSG_CHECKING(for dmedia audio support)
        have_dmedia=no
        AC_TRY_COMPILE([
          #include <dmedia/audio.h>
        ],[
          ALport audio_port;
        ],[
        have_dmedia=yes
        ])
        # Set up files for the audio library
        if test x$have_dmedia = xyes; then
            CFLAGS="$CFLAGS -DDMEDIA_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS dmedia"
            AUDIO_DRIVERS="$AUDIO_DRIVERS dmedia/libaudio_dmedia.la"
            SYSTEM_LIBS="$SYSTEM_LIBS -laudio"
        fi
    fi
}

dnl Find the ESD includes and libraries
CheckESD()
{
    AC_ARG_ENABLE(esd,
[  --enable-esd            support the Enlightened Sound Daemon [default=yes]],
                  , enable_esd=yes)
    if test x$enable_audio = xyes -a x$enable_esd = xyes; then
        use_esd=no
        AM_PATH_ESD(0.2.8, use_esd=yes)
        if test x$use_esd = xyes; then
            AC_ARG_ENABLE(esd-shared,
[  --enable-esd-shared     dynamically load ESD audio support [default=yes]],
                          , enable_esd_shared=yes)
            esd_lib_spec=`echo $ESD_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libesd.so.*/'`
            esd_lib=`ls $esd_lib_spec | head -1 | sed 's/.*\/\(.*\)/\1/'`
            echo "-- $esd_lib_spec -> $esd_lib"
            if test x$use_dlopen != xyes && \
               test x$enable_esd_shared = xyes; then
                AC_MSG_ERROR([You must have dlopen() support and use the --enable-dlopen option])
            fi
            if test x$use_dlopen = xyes && \
               test x$enable_esd_shared = xyes && test x$esd_lib != x; then
                CFLAGS="$CFLAGS -DESD_SUPPORT -DESD_DYNAMIC=\$(esd_lib) $ESD_CFLAGS"
                AC_SUBST(esd_lib)
            else
                CFLAGS="$CFLAGS -DESD_SUPPORT $ESD_CFLAGS"
                SYSTEM_LIBS="$SYSTEM_LIBS $ESD_LIBS"
            fi
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS esd"
            AUDIO_DRIVERS="$AUDIO_DRIVERS esd/libaudio_esd.la"
        fi
    fi
}

CheckARTSC()
{
    AC_ARG_ENABLE(arts,
[  --enable-arts           support the Analog Real Time Synthesizer [default=yes]],
                  , enable_arts=yes)
    if test x$enable_audio = xyes -a x$enable_arts = xyes; then
        AC_PATH_PROG(ARTSCCONFIG, artsc-config)
        if test x$ARTSCCONFIG = x -o x$ARTSCCONFIG = x'"$ARTSCCONFIG"'; then
            : # arts isn't installed
        else
            ARTSC_CFLAGS=`$ARTSCCONFIG --cflags`
            ARTSC_LIBS=`$ARTSCCONFIG --libs`
            AC_MSG_CHECKING(for aRts development environment)
            audio_arts=no
            save_CFLAGS="$CFLAGS"
            CFLAGS="$CFLAGS $ARTSC_CFLAGS"
            AC_TRY_COMPILE([
             #include <artsc.h>
            ],[
             arts_stream_t stream;
            ],[
            audio_arts=yes
            ])
            CFLAGS="$save_CFLAGS"
            AC_MSG_RESULT($audio_arts)
            if test x$audio_arts = xyes; then
                AC_ARG_ENABLE(arts-shared,
[  --enable-arts-shared    dynamically load aRts audio support [default=yes]],
                              , enable_arts_shared=yes)
                arts_lib_spec=`echo $ARTSC_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libartsc.so.*/'`
                arts_lib=`ls $arts_lib_spec | head -1 | sed 's/.*\/\(.*\)/\1/'`
                echo "-- $arts_lib_spec -> $arts_lib"
                if test x$use_dlopen != xyes && \
                   test x$enable_arts_shared = xyes; then
                    AC_MSG_ERROR([You must have dlopen() support and use the --enable-dlopen option])
                fi
                if test x$use_dlopen = xyes && \
                   test x$enable_arts_shared = xyes && test x$arts_lib != x; then
                    CFLAGS="$CFLAGS -DARTSC_SUPPORT -DARTSC_DYNAMIC=\$(arts_lib) $ARTSC_CFLAGS"
                    AC_SUBST(arts_lib)
                else
                    CFLAGS="$CFLAGS -DARTSC_SUPPORT $ARTSC_CFLAGS"
                    SYSTEM_LIBS="$SYSTEM_LIBS $ARTSC_LIBS"
                fi
                AUDIO_SUBDIRS="$AUDIO_SUBDIRS arts"
                AUDIO_DRIVERS="$AUDIO_DRIVERS arts/libaudio_arts.la"
            fi
        fi
    fi
}

dnl See if the NAS audio interface is supported
CheckNAS()
{
    AC_ARG_ENABLE(nas,
[  --enable-nas            support the NAS audio API [default=yes]],
                  , enable_nas=yes)
    if test x$enable_audio = xyes -a x$enable_nas = xyes; then
        AC_MSG_CHECKING(for NAS audio support)
        have_nas=no
        if test -r /usr/X11R6/include/audio/audiolib.h; then
            have_nas=yes
            CFLAGS="$CFLAGS -DNAS_SUPPORT -I/usr/X11R6/include/"
            SYSTEM_LIBS="$SYSTEM_LIBS -laudio -lXt"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS nas"
            AUDIO_DRIVERS="$AUDIO_DRIVERS nas/libaudio_nas.la"

        dnl On IRIX, the NAS includes are in a different directory,
        dnl and libnas must be explicitly linked in

        elif test -r /usr/freeware/include/nas/audiolib.h; then
            have_nas=yes
            CFLAGS="$CFLAGS -DNAS_SUPPORT"
            SYSTEM_LIBS="$SYSTEM_LIBS -lnas -lXt"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS nas"
            AUDIO_DRIVERS="$AUDIO_DRIVERS nas/libaudio_nas.la"
        fi
        AC_MSG_RESULT($have_nas)
    fi
}

dnl rcg07142001 See if the user wants the disk writer audio driver...
CheckDiskAudio()
{
    AC_ARG_ENABLE(diskaudio,
[  --enable-diskaudio      support the disk writer audio driver [default=yes]],
                  , enable_diskaudio=yes)
    if test x$enable_audio = xyes -a x$enable_diskaudio = xyes; then
        CFLAGS="$CFLAGS -DDISKAUD_SUPPORT"
        AUDIO_SUBDIRS="$AUDIO_SUBDIRS disk"
        AUDIO_DRIVERS="$AUDIO_DRIVERS disk/libaudio_disk.la"
    fi
}

dnl Set up the Atari Audio driver
CheckAtariAudio()
{
    AC_ARG_ENABLE(mintaudio,
[  --enable-mintaudio      support Atari audio driver [default=yes]],
                  , enable_mintaudio=yes)
    if test x$enable_audio = xyes -a x$enable_mintaudio = xyes; then
        mintaudio=no
        AC_CHECK_HEADER(mint/falcon.h, have_mint_falcon_hdr=yes)
        if test x$have_mint_falcon_hdr = xyes; then
            mintaudio=yes
            CFLAGS="$CFLAGS -DMINTAUDIO_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS mint"
            AUDIO_DRIVERS="$AUDIO_DRIVERS mint/libaudio_mintaudio.la"
        fi
    fi
}

dnl See if we can use x86 assembly blitters
# NASM is available from: http://nasm.octium.net/
CheckNASM()
{
    dnl Make sure we are running on an x86 platform
    case $target in
        i?86*)
            ;;
        *)
        # Nope, bail early.
            return
            ;;
    esac
    dnl Check for NASM (for assembly blit routines)
    AC_ARG_ENABLE(nasm,
[  --enable-nasm           use nasm assembly blitters on x86 [default=yes]],
                  , enable_nasm=yes)
    if test x$enable_video = xyes -a x$enable_nasm = xyes; then
        AC_PATH_PROG(NASM, nasm)
        if test x$NASM = x -o x$NASM = x'"$NASM"'; then
            : # nasm isn't installed
        else
            CFLAGS="$CFLAGS -DUSE_ASMBLIT -I$srcdir/hermes"
            case $ARCH in
              win32)
                  NASMFLAGS="-f win32"
                  ;;
              openbsd)
                  NASMFLAGS="-f aoutb"
                  ;;
              *)
                  NASMFLAGS="-f elf"
                  ;;
            esac
            AC_SUBST(NASMFLAGS)
            CFLAGS="$CFLAGS -I\$(top_srcdir)/src/hermes"
            SDL_EXTRADIRS="$SDL_EXTRADIRS hermes"
            SDL_EXTRALIBS="$SDL_EXTRALIBS hermes/libhermes.la"
            use_nasm=yes
        fi
    fi
}

dnl Find the nanox include and library directories
CheckNANOX()
{
    AC_ARG_ENABLE(video-nanox,
        [  --enable-video-nanox use nanox video driver [default=no]],
        , enable_video_nanox=no)
    AC_ARG_ENABLE(nanox-debug,  
        [  --enable-nanox-debug print debug messages [default=no]],
        , enable_nanox_debug=no)
    AC_ARG_ENABLE(nanox-share-memory,  
        [  --enable-nanox-share-memory use share memory [default=no]],
        , enable_nanox_share_memory=no)
    AC_ARG_ENABLE(nanox_direct_fb, 
        [  --enable-nanox-direct-fb use direct framebuffer access [default=no]],
        , enable_nanox_direct_fb=no)

    if test x$enable_video = xyes -a x$enable_video_nanox = xyes; then
        if test x$enable_nanox_debug = xyes; then
            CFLAGS="$CFLAGS -DENABLE_NANOX_DEBUG"
        fi

        if test x$enable_nanox_share_memory = xyes; then
            CFLAGS="$CFLAGS -DNANOX_SHARE_MEMORY"
        fi

        if test x$enable_nanox_direct_fb = xyes; then
            CFLAGS="$CFLAGS -DENABLE_NANOX_DIRECT_FB"
        fi

        CFLAGS="$CFLAGS $X_CFLAGS -DENABLE_NANOX"
        SYSTEM_LIBS="$SYSTEM_LIBS -lnano-X"
        VIDEO_SUBDIRS="$VIDEO_SUBDIRS nanox"
        VIDEO_DRIVERS="$VIDEO_DRIVERS nanox/libvideo_nanox.la"
    fi
}

dnl Find the X11 include and library directories
CheckX11()
{
    AC_ARG_ENABLE(video-x11,
[  --enable-video-x11      use X11 video driver [default=yes]],
                  , enable_video_x11=yes)
    if test x$enable_video = xyes -a x$enable_video_x11 = xyes; then
        AC_PATH_X
        AC_PATH_XTRA
        if test x$have_x = xyes; then
            CFLAGS="$CFLAGS $X_CFLAGS -DENABLE_X11 -DXTHREADS -I$srcdir/include -I$srcdir/src/video"
            if test x$ac_cv_func_shmat != xyes; then
                CFLAGS="$CFLAGS -DNO_SHARED_MEMORY"
            fi
            SYSTEM_LIBS="$SYSTEM_LIBS $X_LIBS -lX11 -lXext"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS x11"
            VIDEO_DRIVERS="$VIDEO_DRIVERS x11/libvideo_x11.la"

            AC_ARG_ENABLE(video-x11-vm,
[  --enable-video-x11-vm   use X11 VM extension for fullscreen [default=yes]],
                          , enable_video_x11_vm=yes)
            if test x$enable_video_x11_vm = xyes; then
                AC_MSG_CHECKING(for XFree86 VidMode 1.0 support)
                video_x11_vm=no
                AC_TRY_COMPILE([
                 #include <X11/Xlib.h>
                 #include <XFree86/extensions/xf86vmode.h>
                ],[
                ],[
                video_x11_vm=yes
                ])
                AC_MSG_RESULT($video_x11_vm)
                if test x$video_x11_vm = xyes; then
                    CFLAGS="$CFLAGS -DXFREE86_VM"
                    VIDEO_SUBDIRS="$VIDEO_SUBDIRS XFree86/Xxf86vm"
                    VIDEO_DRIVERS="$VIDEO_DRIVERS XFree86/Xxf86vm/libXFree86_Xxf86vm.la"
                    AC_MSG_CHECKING(for XFree86 VidMode gamma support)
                    video_x11_vmgamma=no
                    AC_TRY_COMPILE([
                     #include <X11/Xlib.h>
                     #include <XFree86/extensions/xf86vmode.h>
                    ],[
                     SDL_NAME(XF86VidModeGamma) gamma;
                    ],[
                    video_x11_vmgamma=yes
                    ])
                    AC_MSG_RESULT($video_x11_vmgamma)
                    if test x$video_x11_vmgamma = xyes; then
                        CFLAGS="$CFLAGS -DXFREE86_VMGAMMA"
                    fi
                fi
            fi
            AC_ARG_ENABLE(dga,
[  --enable-dga            allow use of X11 DGA code [default=yes]],
                          , enable_dga=yes)
            AC_ARG_ENABLE(video-x11-dgamouse,
[  --enable-video-x11-dgamouse  use X11 DGA for mouse events [default=yes]],
                          , enable_video_x11_dgamouse=yes)
            if test x$enable_dga = xyes; then
                AC_MSG_CHECKING(for XFree86 DGA 1.0 support)
                video_x11_dga=no
                AC_TRY_COMPILE([
                 #include <X11/Xlib.h>
                 #include <XFree86/extensions/xf86dga.h>
                ],[
                ],[
                video_x11_dga=yes
                ])
                AC_MSG_RESULT($video_x11_dga)
                if test x$video_x11_dga = xyes; then
                    CFLAGS="$CFLAGS -DXFREE86_DGAMOUSE"
                    if test x$enable_video_x11_dgamouse = xyes; then
                        CFLAGS="$CFLAGS -DDEFAULT_DGAMOUSE"
                    fi
                    VIDEO_SUBDIRS="$VIDEO_SUBDIRS XFree86/Xxf86dga"
                    VIDEO_DRIVERS="$VIDEO_DRIVERS XFree86/Xxf86dga/libXFree86_Xxf86dga.la"
                fi
            fi
            AC_ARG_ENABLE(video-x11-xv,
[  --enable-video-x11-xv   use X11 XvImage extension for video [default=yes]],
                          , enable_video_x11_xv=yes)
            if test x$enable_video_x11_xv = xyes; then
                AC_MSG_CHECKING(for XFree86 XvImage support)
                video_x11_xv=no
                AC_TRY_COMPILE([
                 #include <X11/Xlib.h>
                 #include <sys/ipc.h>
                 #include <sys/shm.h>
                 #include <X11/extensions/XShm.h>
                 #include <XFree86/extensions/Xvlib.h>
                ],[
                 SDL_NAME(XvImage) *image;
                ],[
                video_x11_xv=yes
                ])
                AC_MSG_RESULT($video_x11_xv)
                if test x$video_x11_xv = xyes; then
                    CFLAGS="$CFLAGS -DXFREE86_XV"
                    VIDEO_SUBDIRS="$VIDEO_SUBDIRS XFree86/Xv"
                    VIDEO_DRIVERS="$VIDEO_DRIVERS XFree86/Xv/libXFree86_Xv.la"
                fi
            fi
            AC_ARG_ENABLE(video-x11-xinerama,
[  --enable-video-x11-xinerama   enable X11 Xinerama support [default=yes]],
                            , enable_video_x11_xinerama=yes)
            if test x$enable_video_x11_xinerama = xyes; then
                AC_MSG_CHECKING(for X11 Xinerama support)
                video_x11_xinerama=no
                AC_TRY_COMPILE([
                 #include <X11/Xlib.h>
                 #include <XFree86/extensions/Xinerama.h>
                ],[
                 SDL_NAME(XineramaScreenInfo) *xinerama;
                ],[
                video_x11_xinerama=yes
                ])
                AC_MSG_RESULT($video_x11_xinerama)
                if test x$video_x11_xinerama = xyes; then
                    CFLAGS="$CFLAGS -DHAVE_XINERAMA"
                    VIDEO_SUBDIRS="$VIDEO_SUBDIRS XFree86/Xinerama"
                    VIDEO_DRIVERS="$VIDEO_DRIVERS XFree86/Xinerama/libXFree86_Xinerama.la"
                fi
            fi
            AC_ARG_ENABLE(video-x11-xme,
[  --enable-video-x11-xme  enable Xi Graphics XME for fullscreen [default=yes]],
                            , enable_video_x11_xme=yes)
            if test x$enable_video_x11_xme = xyes; then
                AC_MSG_CHECKING(for Xi Graphics XiGMiscExtension support)
                video_x11_xme=no
                AC_TRY_COMPILE([
                 #include <X11/Xlib.h>
                 #include <X11/extensions/xme.h>
                ],[
                 XiGMiscResolutionInfo *resolutions;
                ],[
                video_x11_xme=yes
                ])
                AC_MSG_RESULT($video_x11_xme)
                if test x$video_x11_xme = xyes; then
                    CFLAGS="$CFLAGS -DHAVE_XIGXME"
                    SYSTEM_LIBS="$SYSTEM_LIBS -lxme"
                fi
            fi
        fi
    fi
}

dnl Find the X11 DGA 2.0 include and library directories
CheckDGA()
{
    AC_ARG_ENABLE(video-dga,
[  --enable-video-dga      use DGA 2.0 video driver [default=yes]],
                  , enable_video_dga=yes)
    if test x$video_x11_dga = xyes -a x$enable_video_dga = xyes; then
        save_CFLAGS="$CFLAGS"; CFLAGS="$CFLAGS -Isrc/video"
        AC_MSG_CHECKING(for XFree86 DGA 2.0 support)
        video_x11_dga2=no
        AC_TRY_COMPILE([
         #include <X11/Xlib.h>
         #include <XFree86/extensions/xf86dga.h>
        ],[
         SDL_NAME(XDGAEvent) xevent;
        ],[
        video_x11_dga2=yes
        ])
        AC_MSG_RESULT($video_x11_dga2)
        if test x$video_x11_dga2 = xyes; then
            CFLAGS="$CFLAGS -DENABLE_DGA"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS dga"
            VIDEO_DRIVERS="$VIDEO_DRIVERS dga/libvideo_dga.la"
        fi
    fi
}

CheckPHOTON()
{
    AC_ARG_ENABLE(video-photon,
[  --enable-video-photon   use QNX Photon video driver [default=yes]],
                  , enable_video_photon=yes)
    if test x$enable_video = xyes -a x$enable_video_photon = xyes; then
        AC_MSG_CHECKING(for QNX Photon support)
        video_photon=no
        AC_TRY_COMPILE([
          #include <Ph.h>
          #include <Pt.h>
          #include <photon/Pg.h>
          #include <photon/PdDirect.h>
        ],[
         PgDisplaySettings_t *visual;
        ],[
        video_photon=yes
        ])
        AC_MSG_RESULT($video_photon)
        if test x$video_photon = xyes; then
            CFLAGS="$CFLAGS -DENABLE_PHOTON"
            SYSTEM_LIBS="$SYSTEM_LIBS -lph"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS photon"
            VIDEO_DRIVERS="$VIDEO_DRIVERS photon/libvideo_photon.la"
            CheckOpenGLQNX
        fi
    fi
}

dnl Find the framebuffer console includes
CheckFBCON()
{
    AC_ARG_ENABLE(video-fbcon,
[  --enable-video-fbcon    use framebuffer console video driver [default=yes]],
                  , enable_video_fbcon=yes)
    if test x$enable_video = xyes -a x$enable_video_fbcon = xyes; then
        AC_MSG_CHECKING(for framebuffer console support)
        video_fbcon=no
        AC_TRY_COMPILE([
         #include <linux/fb.h>
         #include <linux/kd.h>
         #include <linux/keyboard.h>
        ],[
        ],[
        video_fbcon=yes
        ])
        AC_MSG_RESULT($video_fbcon)
        if test x$video_fbcon = xyes; then
            CFLAGS="$CFLAGS -DENABLE_FBCON"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS fbcon"
            VIDEO_DRIVERS="$VIDEO_DRIVERS fbcon/libvideo_fbcon.la"
        fi
    fi
}

dnl Find DirectFB
CheckDirectFB()
{
    AC_ARG_ENABLE(video-directfb,
[  --enable-video-directfb use DirectFB video driver [default=no]],
                  , enable_video_directfb=no)
    if test x$enable_video = xyes -a x$enable_video_directfb = xyes; then
        video_directfb=no

        AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
        if test x$PKG_CONFIG = xno ; then
            AC_MSG_WARN([*** pkg-config is required to build the DirectFB video driver.])
        else
            AC_MSG_CHECKING(for DirectFB support)

            if ! $PKG_CONFIG --atleast-pkgconfig-version 0.7 ; then
                AC_MSG_ERROR([*** pkg-config too old; version 0.7 or better required.])
            fi

            DIRECTFB_REQUIRED_VERSION=0.9.15

            if $PKG_CONFIG --atleast-version $DIRECTFB_REQUIRED_VERSION directfb ; then
                DIRECTFB_CFLAGS=`$PKG_CONFIG --cflags directfb`
                DIRECTFB_LIBS=`$PKG_CONFIG --libs directfb`
                video_directfb=yes
            fi
        fi

        AC_MSG_RESULT($video_directfb)
        if test x$video_directfb = xyes; then
            CFLAGS="$CFLAGS -DENABLE_DIRECTFB"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS directfb"
            VIDEO_DRIVERS="$VIDEO_DRIVERS directfb/libvideo_directfb.la"

            AC_SUBST(DIRECTFB_CFLAGS)
            AC_SUBST(DIRECTFB_LIBS)
        fi
    fi
}

dnl See if we're running on PlayStation 2 hardware
CheckPS2GS()
{
    AC_ARG_ENABLE(video-ps2gs,
[  --enable-video-ps2gs    use PlayStation 2 GS video driver [default=yes]],
                  , enable_video_ps2gs=yes)
    if test x$enable_video = xyes -a x$enable_video_ps2gs = xyes; then
        AC_MSG_CHECKING(for PlayStation 2 GS support)
        video_ps2gs=no
        AC_TRY_COMPILE([
         #include <linux/ps2/dev.h>
         #include <linux/ps2/gs.h>
        ],[
        ],[
        video_ps2gs=yes
        ])
        AC_MSG_RESULT($video_ps2gs)
        if test x$video_ps2gs = xyes; then
            CFLAGS="$CFLAGS -DENABLE_PS2GS"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS ps2gs"
            VIDEO_DRIVERS="$VIDEO_DRIVERS ps2gs/libvideo_ps2gs.la"
        fi
    fi
}

dnl Find the GGI includes
CheckGGI()
{
    AC_ARG_ENABLE(video-ggi,
[  --enable-video-ggi      use GGI video driver [default=no]],
                  , enable_video_ggi=no)
    if test x$enable_video = xyes -a x$enable_video_ggi = xyes; then
        AC_MSG_CHECKING(for GGI support)
        video_ggi=no
        AC_TRY_COMPILE([
         #include <ggi/ggi.h>
         #include <ggi/gii.h>
        ],[
        ],[
        video_ggi=yes
        ])
        AC_MSG_RESULT($video_ggi)
        if test x$video_ggi = xyes; then
            CFLAGS="$CFLAGS $X_CFLAGS -DENABLE_GGI"
            SYSTEM_LIBS="$SYSTEM_LIBS -lggi -lgii -lgg"

            VIDEO_SUBDIRS="$VIDEO_SUBDIRS ggi"
            VIDEO_DRIVERS="$VIDEO_DRIVERS ggi/libvideo_ggi.la"
        fi
    fi
}

dnl Find the SVGAlib includes and libraries
CheckSVGA()
{
    AC_ARG_ENABLE(video-svga,
[  --enable-video-svga     use SVGAlib video driver [default=no]],
                  , enable_video_svga=no)
    if test x$enable_video = xyes -a x$enable_video_svga = xyes; then
        AC_MSG_CHECKING(for SVGAlib (1.4.0+) support)
        video_svga=no
        AC_TRY_COMPILE([
         #include <vga.h>
         #include <vgamouse.h>
         #include <vgakeyboard.h>
        ],[
         if ( SCANCODE_RIGHTWIN && SCANCODE_LEFTWIN ) {
             exit(0);
         }
        ],[
        video_svga=yes
        ])
        AC_MSG_RESULT($video_svga)
        if test x$video_svga = xyes; then
            CFLAGS="$CFLAGS -DENABLE_SVGALIB"
            SYSTEM_LIBS="$SYSTEM_LIBS -lvga"

            VIDEO_SUBDIRS="$VIDEO_SUBDIRS svga"
            VIDEO_DRIVERS="$VIDEO_DRIVERS svga/libvideo_svga.la"
        fi
    fi
}

dnl Find the VGL includes and libraries
CheckVGL()
{
    AC_ARG_ENABLE(video-vgl,
[  --enable-video-vgl      use VGL video driver [default=no]],
                  , enable_video_vgl=no)
    if test x$enable_video = xyes -a x$enable_video_vgl = xyes; then
        AC_MSG_CHECKING(for libVGL support)
        video_vgl=no
        AC_TRY_COMPILE([
         #include <sys/fbio.h>
         #include <sys/consio.h>
         #include <sys/kbio.h>
         #include <vgl.h>
        ],[
         VGLBitmap bitmap;
         exit(bitmap.Bitmap);
        ],[
        video_vgl=yes
        ])
        AC_MSG_RESULT($video_vgl)
        if test x$video_vgl = xyes; then
            CFLAGS="$CFLAGS -DENABLE_VGL"
            SYSTEM_LIBS="$SYSTEM_LIBS -lvgl"

            VIDEO_SUBDIRS="$VIDEO_SUBDIRS vgl"
            VIDEO_DRIVERS="$VIDEO_DRIVERS vgl/libvideo_vgl.la"
        fi
    fi
}

dnl Find the AAlib includes
CheckAAlib()
{
    AC_ARG_ENABLE(video-aalib,
[  --enable-video-aalib    use AAlib video driver [default=no]],
                  , enable_video_aalib=no)
    if test x$enable_video = xyes -a x$enable_video_aalib = xyes; then
        AC_MSG_CHECKING(for AAlib support)
        video_aalib=no
        AC_TRY_COMPILE([
         #include <aalib.h>
        ],[
        ],[
        video_aalib=yes
        ])
        AC_MSG_RESULT($video_aalib)
        if test x$video_aalib = xyes; then
            CFLAGS="$CFLAGS -DENABLE_AALIB"
            SYSTEM_LIBS="$SYSTEM_LIBS -laa"

            VIDEO_SUBDIRS="$VIDEO_SUBDIRS aalib"
            VIDEO_DRIVERS="$VIDEO_DRIVERS aalib/libvideo_aa.la"
        fi
    fi
}

dnl Set up the Atari Xbios driver
CheckAtariXbiosVideo()
{
    AC_ARG_ENABLE(xbios,
[  --enable-video-xbios    use Atari Xbios video driver [default=yes]],
                  , enable_video_xbios=yes)
    video_xbios=no
    if test x$enable_video = xyes -a x$enable_video_xbios = xyes; then
        video_xbios=yes
        CFLAGS="$CFLAGS -DENABLE_XBIOS"
        VIDEO_SUBDIRS="$VIDEO_SUBDIRS xbios"
        VIDEO_DRIVERS="$VIDEO_DRIVERS xbios/libvideo_xbios.la"
    fi
}

dnl Set up the Atari Gem driver
CheckAtariGemVideo()
{
    AC_ARG_ENABLE(gem,
[  --enable-video-gem      use Atari Gem video driver [default=yes]],
                  , enable_video_gem=yes)
    if test x$enable_video = xyes -a x$enable_video_gem = xyes; then
        video_gem=no
        AC_CHECK_HEADER(gem.h, have_gem_hdr=yes)
        AC_CHECK_LIB(gem, appl_init, have_gem_lib=yes)
        if test x$have_gem_hdr = xyes -a x$have_gem_lib = xyes; then
            video_gem=yes
            CFLAGS="$CFLAGS -DENABLE_GEM"
            SYSTEM_LIBS="$SYSTEM_LIBS -lgem"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS gem"
            VIDEO_DRIVERS="$VIDEO_DRIVERS gem/libvideo_gem.la"
        fi
    fi
}

dnl Set up the Atari Bios keyboard driver
CheckAtariBiosEvent()
{
    CFLAGS="$CFLAGS -I\$(top_srcdir)/src/video/ataricommon"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS ataricommon"
    VIDEO_DRIVERS="$VIDEO_DRIVERS ataricommon/libvideo_ataricommon.la"
}

dnl rcg04172001 Set up the Null video driver.
CheckDummyVideo()
{
    AC_ARG_ENABLE(video-dummy,
[  --enable-video-dummy    use dummy video driver [default=yes]],
                  , enable_video_dummy=yes)
    if test x$enable_video_dummy = xyes; then
      CFLAGS="$CFLAGS -DENABLE_DUMMYVIDEO"
      VIDEO_SUBDIRS="$VIDEO_SUBDIRS dummy"
      VIDEO_DRIVERS="$VIDEO_DRIVERS dummy/libvideo_null.la"
    fi
}

dnl Check to see if OpenGL support is desired
AC_ARG_ENABLE(video-opengl,
[  --enable-video-opengl   include OpenGL context creation [default=yes]],
              , enable_video_opengl=yes)

dnl Find OpenGL
CheckOpenGL()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        AC_MSG_CHECKING(for OpenGL (GLX) support)
        video_opengl=no
        AC_TRY_COMPILE([
         #include <GL/gl.h>
         #include <GL/glx.h>
         #include <dlfcn.h> /* For loading extensions */
        ],[
        ],[
        video_opengl=yes
        ])
        AC_MSG_RESULT($video_opengl)
        if test x$video_opengl = xyes; then
            CFLAGS="$CFLAGS -DHAVE_OPENGL"
            if test x$use_dlopen != xyes; then
                AC_CHECK_LIB(dl, dlopen, SYSTEM_LIBS="$SYSTEM_LIBS -ldl")
            fi
        fi
    fi
}

dnl Find QNX RtP OpenGL
CheckOpenGLQNX()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        AC_MSG_CHECKING(for OpenGL (Photon) support)
        video_opengl=no
        AC_TRY_COMPILE([
         #include <GL/gl.h>
        ],[
        ],[
        video_opengl=yes
        ])
        AC_MSG_RESULT($video_opengl)
        if test x$video_opengl = xyes; then
            CFLAGS="$CFLAGS -DHAVE_OPENGL"
            SYSTEM_LIBS="$SYSTEM_LIBS -lGL"
            if test x$use_dlopen != xyes; then
                AC_CHECK_LIB(c, dlopen, SYSTEM_LIBS="$SYSTEM_LIBS", AC_CHECK_LIB(ltdl, dlopen, SYSTEM_LIBS="$SYSTEM_LIBS -lltdl"))
            fi
        fi
    fi
}

dnl Check for BeOS OpenGL
CheckBeGL()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        CFLAGS="$CFLAGS -DHAVE_OPENGL"
        SYSTEM_LIBS="$SYSTEM_LIBS -lGL"
    fi
}

dnl Check for MacOS OpenGL
CheckMacGL()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        CFLAGS="$CFLAGS -DHAVE_OPENGL"
        case "$target" in
            *-*-darwin*)
                SYSTEM_LIBS="$SYSTEM_LIBS -framework OpenGL -framework AGL"
        esac
    fi
}

dnl See if we can use the new unified event interface in Linux 2.4
CheckInputEvents()
{
    dnl Check for Linux 2.4 unified input event interface support
    AC_ARG_ENABLE(input-events,
[  --enable-input-events   use Linux 2.4 unified input interface [default=yes]],
                  , enable_input_events=yes)
    if test x$enable_input_events = xyes; then
        AC_MSG_CHECKING(for Linux 2.4 unified input interface)
        use_input_events=no
        AC_TRY_COMPILE([
          #include <linux/input.h>
        ],[
          #ifndef EVIOCGNAME
          #error EVIOCGNAME() ioctl not available
          #endif
        ],[
        use_input_events=yes
        ])
        AC_MSG_RESULT($use_input_events)
        if test x$use_input_events = xyes; then
            CFLAGS="$CFLAGS -DUSE_INPUT_EVENTS"
        fi
    fi
}

dnl See if we can use GNU pth library for threads
CheckPTH()
{
    dnl Check for pth support
    AC_ARG_ENABLE(pth,
[  --enable-pth            use GNU pth library for multi-threading [default=yes]],
                  , enable_pth=yes)
    if test x$enable_threads = xyes -a x$enable_pth = xyes; then
        AC_PATH_PROG(PTH_CONFIG, pth-config, no)
        if test "$PTH_CONFIG" = "no"; then
            use_pth=no
        else
            PTH_CFLAGS=`$PTH_CONFIG --cflags`
            PTH_LIBS=`$PTH_CONFIG --libs --all`
            SDL_CFLAGS="$SDL_CFLAGS $PTH_CFLAGS"
            SDL_LIBS="$SDL_LIBS $PTH_LIBS"
            CFLAGS="$CFLAGS -DENABLE_PTH"
            use_pth=yes
        fi
        AC_MSG_CHECKING(pth)
        if test "x$use_pth" = xyes; then
            AC_MSG_RESULT(yes)
        else
            AC_MSG_RESULT(no)
        fi
    fi
}

dnl See what type of thread model to use on Linux and Solaris
CheckPTHREAD()
{
    dnl Check for pthread support
    AC_ARG_ENABLE(pthreads,
[  --enable-pthreads       use POSIX threads for multi-threading [default=yes]],
                  , enable_pthreads=yes)
    dnl This is used on Linux for glibc binary compatibility (Doh!)
    AC_ARG_ENABLE(pthread-sem,
[  --enable-pthread-sem    use pthread semaphores [default=yes]],
                  , enable_pthread_sem=yes)
    case "$target" in
        *-*-bsdi*)
            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            pthread_lib=""
            ;;
        *-*-darwin*)
            pthread_cflags="-D_THREAD_SAFE"
# causes Carbon.p complaints?
#            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            ;;
        *-*-freebsd*)
            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            pthread_lib="-pthread"
            ;;
        *-*-netbsd*)
            pthread_cflags="-I/usr/pkg/include -D_REENTRANT"
            pthread_lib="-L/usr/pkg/lib -lpthread -lsem"
            ;;
        *-*-openbsd*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-pthread"
            ;;
        *-*-solaris*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-lpthread -lposix4"
            ;;
        *-*-sysv5*)
            pthread_cflags="-D_REENTRANT -Kthread"
            pthread_lib=""
            ;;
        *-*-irix*)
            pthread_cflags="-D_SGI_MP_SOURCE"
            pthread_lib="-lpthread"
            ;;
        *-*-aix*)
            pthread_cflags="-D_REENTRANT -mthreads"
            pthread_lib="-lpthread"
            ;;
        *-*-hpux11*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-L/usr/lib -lpthread"
            ;;
        *-*-qnx*)
            pthread_cflags=""
            pthread_lib=""
            ;;
        *)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-lpthread"
            ;;
    esac
    if test x$enable_threads = xyes -a x$enable_pthreads = xyes; then
        # Save the original compiler flags and libraries
        ac_save_cflags="$CFLAGS"; ac_save_libs="$LIBS"
        # Add the pthread compiler flags and libraries
        CFLAGS="$CFLAGS $pthread_cflags"; LIBS="$LIBS $pthread_lib"
        # Check to see if we have pthread support on this system
        AC_MSG_CHECKING(for pthreads)
        use_pthreads=no
        AC_TRY_LINK([
         #include <pthread.h>
        ],[
         pthread_attr_t type;
         pthread_attr_init(&type);
        ],[
        use_pthreads=yes
        ])
        AC_MSG_RESULT($use_pthreads)
        # Restore the compiler flags and libraries
        CFLAGS="$ac_save_cflags"; LIBS="$ac_save_libs"
        # Do futher testing if we have pthread support...
        if test x$use_pthreads = xyes; then
            CFLAGS="$CFLAGS $pthread_cflags -DSDL_USE_PTHREADS"
            SDL_CFLAGS="$SDL_CFLAGS $pthread_cflags"
            SDL_LIBS="$SDL_LIBS $pthread_lib"

            # Check to see if recursive mutexes are available
            AC_MSG_CHECKING(for recursive mutexes)
            has_recursive_mutexes=no
            AC_TRY_LINK([
              #include <pthread.h>
            ],[
              pthread_mutexattr_t attr;
              #if defined(linux) && !(defined(__arm__) && defined(QWS))
              pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
              #else
              pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
              #endif
            ],[
            has_recursive_mutexes=yes
            ])
            # Some systems have broken recursive mutex implementations
            case "$target" in
                *-*-darwin*)
                    has_recursive_mutexes=no
                    ;;
                *-*-solaris*)
                    has_recursive_mutexes=no
                    ;;
            esac
            AC_MSG_RESULT($has_recursive_mutexes)
            if test x$has_recursive_mutexes != xyes; then
                CFLAGS="$CFLAGS -DPTHREAD_NO_RECURSIVE_MUTEX"
            fi

            # Check to see if pthread semaphore support is missing
            if test x$enable_pthread_sem = xyes; then
                AC_MSG_CHECKING(for pthread semaphores)
                have_pthread_sem=no
                AC_TRY_COMPILE([
                  #include <pthread.h>
                  #include <semaphore.h>
                ],[
                ],[
                have_pthread_sem=yes
                ])
                AC_MSG_RESULT($have_pthread_sem)
            fi

            # Check to see if this is broken glibc 2.0 pthreads
            case "$target" in
                *-*-linux*)
                    AC_MSG_CHECKING(for broken glibc 2.0 pthreads)
                    glibc20_pthreads=no
                    AC_TRY_COMPILE([
                      #include <features.h>
                      #if (__GLIBC__ == 2) && (__GLIBC_MINOR__ == 0)
                      #warning Working around a bug in glibc 2.0 pthreads
                      #else
                      #error pthread implementation okay
                      #endif /* glibc 2.0 */
                    ],[
                    ],[
                    glibc20_pthreads=yes
                    ])
                    AC_MSG_RESULT($glibc20_pthreads)
            esac
        fi
    fi

    AC_MSG_CHECKING(whether semun is defined in /usr/include/sys/sem.h)
    have_semun=no
    AC_TRY_COMPILE([
      #include <sys/types.h>
      #include <sys/sem.h>
    ],[
      union semun t;
    ],[
    have_semun=yes
    ])
    AC_MSG_RESULT($have_semun)
    if test x$have_semun = xyes; then
        CFLAGS="$CFLAGS -DHAVE_SEMUN"
    fi

    # See if we can use GNU Pth or clone() on Linux directly
    if test x$enable_threads = xyes -a x$use_pthreads != xyes; then
        CheckPTH
        if test x$use_pth != xyes; then
            case "$target" in
                *-*-linux*)
                    use_clone=yes
                    ;;
            esac
        fi
    fi
}

# Note that we need to have either semaphores or to have mutexes and
# condition variables to implement all thread synchronization primitives
CopyUnixThreadSource()
{
    if test x$use_pthreads = xyes -o x$use_clone = xyes; then
        # Basic thread creation functions
        COPY_ARCH_SRC(src/thread, linux, SDL_systhread.c)
        COPY_ARCH_SRC(src/thread, linux, SDL_systhread_c.h)

        # Semaphores
        # We can fake these with mutexes and condition variables if necessary
        if test x$use_pthreads = xyes -a x$have_pthread_sem != xyes; then
            COPY_ARCH_SRC(src/thread, generic, SDL_syssem.c)
        else
            COPY_ARCH_SRC(src/thread, linux, SDL_syssem.c)
        fi
        COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)

        # Mutexes
        # We can fake these with semaphores if necessary
        case "$target" in
            *-*-bsdi*)
                COPY_ARCH_SRC(src/thread, bsdi, SDL_syssem.c)
                COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
                COPY_ARCH_SRC(src/thread, linux, SDL_sysmutex.c)
                COPY_ARCH_SRC(src/thread, linux, SDL_sysmutex_c.h)
                ;;
            *)
                if test x$glibc20_pthreads = xyes; then
                    COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex.c)
                    COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex_c.h)
                else
                    COPY_ARCH_SRC(src/thread, linux, SDL_sysmutex.c)
                    COPY_ARCH_SRC(src/thread, linux, SDL_sysmutex_c.h)
                fi
                ;;
        esac

        # Condition variables
        # We can fake these with semaphores and mutexes if necessary
        if test x$glibc20_pthreads = xyes -o x$has_recursive_mutexes != xyes; then
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond.c)
        else
            COPY_ARCH_SRC(src/thread, linux, SDL_syscond.c)
        fi
        COPY_ARCH_SRC(src/thread, generic, SDL_syscond_c.h)

    elif test x$use_pth = xyes; then
        COPY_ARCH_SRC(src/thread, pth, SDL_systhread.c)
        COPY_ARCH_SRC(src/thread, pth, SDL_systhread_c.h)
        COPY_ARCH_SRC(src/thread, pth, SDL_sysmutex.c)
        COPY_ARCH_SRC(src/thread, pth, SDL_sysmutex_c.h)
        COPY_ARCH_SRC(src/thread, pth, SDL_syscond.c)
        COPY_ARCH_SRC(src/thread, pth, SDL_syscond_c.h)
        COPY_ARCH_SRC(src/thread, generic, SDL_syssem.c)
        COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
    else
       AC_MSG_ERROR([
*** No thread support detected
       ])
    fi
}

dnl Determine whether the compiler can produce Win32 executables
CheckWIN32()
{
    AC_MSG_CHECKING(Win32 compiler)
    have_win32_gcc=no
    AC_TRY_COMPILE([
     #include <windows.h>
    ],[
    ],[
    have_win32_gcc=yes
    ])
    AC_MSG_RESULT($have_win32_gcc)
    if test x$have_win32_gcc != xyes; then
       AC_MSG_ERROR([
*** Your compiler ($CC) does not produce Win32 executables!
       ])
    fi

    dnl See if the user wants to redirect standard output to files
    AC_ARG_ENABLE(stdio-redirect,
[  --enable-stdio-redirect Redirect STDIO to files on Win32 [default=yes]],
                  , enable_stdio_redirect=yes)
    if test x$enable_stdio_redirect != xyes; then
        CFLAGS="$CFLAGS -DNO_STDIO_REDIRECT"
    fi
}

dnl Find the DirectX includes and libraries
CheckDIRECTX()
{
    AC_ARG_ENABLE(directx,
[  --enable-directx        use DirectX for Win32 audio/video [default=yes]],
                  , enable_directx=yes)
    if test x$enable_directx = xyes; then
        AC_MSG_CHECKING(for DirectX headers and libraries)
        use_directx=no
        tmp_cflags=$CFLAGS
        CFLAGS="$CFLAGS -I$srcdir"
        AC_TRY_COMPILE([
         #include "src/video/windx5/directx.h"
        ],[
        ],[
        use_directx=yes
        ])
        CFLAGS=$tmp_cflags
        AC_MSG_RESULT($use_directx)
    fi

    CFLAGS="$CFLAGS -I\$(top_srcdir)/src/video/wincommon"
    SYSTEM_LIBS="$SYSTEM_LIBS -luser32 -lgdi32 -lwinmm"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS wincommon"
    VIDEO_DRIVERS="$VIDEO_DRIVERS wincommon/libvideo_wincommon.la"
    # Enable the DIB driver
    CFLAGS="$CFLAGS -DENABLE_WINDIB"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS windib"
    VIDEO_DRIVERS="$VIDEO_DRIVERS windib/libvideo_windib.la"
    # See if we should enable the DirectX driver
    if test x$use_directx = xyes; then
        CFLAGS="$CFLAGS -DENABLE_DIRECTX"
        SYSTEM_LIBS="$SYSTEM_LIBS -ldxguid"
        VIDEO_SUBDIRS="$VIDEO_SUBDIRS windx5"
        VIDEO_DRIVERS="$VIDEO_DRIVERS windx5/libvideo_windx5.la"
    fi
}

dnl Set up the BWindow video driver on BeOS
CheckBWINDOW()
{
    CFLAGS="$CFLAGS -DENABLE_BWINDOW"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS bwindow"
    VIDEO_DRIVERS="$VIDEO_DRIVERS bwindow/libvideo_bwindow.la"
}

dnl Set up the QTopia video driver if enabled
CheckQtopia()
{
    AC_ARG_ENABLE(video-qtopia,
[  --enable-video-qtopia   use Qtopia video driver [default=no]],
                  , enable_video_qtopia=no)
    if test x$enable_video = xyes -a x$enable_video_qtopia = xyes; then
        AC_MSG_CHECKING(for Qtopia support)
        video_qtopia=no
        AC_LANG_CPLUSPLUS
        OLD_CXX="$CXXFLAGS"
        CXXFLAGS="-DQT_QWS_EBX -fno-rtti -fno-exceptions -DQT_QWS_CUSTOM -DQWS -I${QPEDIR}/include -I${QTDIR}/include/ -DNO_DEBUG"
        AC_TRY_COMPILE([
         #include <qpe/qpeapplication.h>
        ],[
        ],[
        video_qtopia=yes
        ])
        CXXFLAGS="$OLD_CXX"
        AC_MSG_RESULT($video_qtopia)
        if test x$video_qtopia = xyes; then
            CFLAGS="$CFLAGS -DENABLE_QTOPIA -DQT_QWS_EBX -DQT_QWS_CUSTOM -DQWS -I${QPEDIR}/include -I${QTDIR}/include/ -DNO_DEBUG -fno-rtti -fno-exceptions"
            SDL_LIBS="$SDL_LIBS -L${QPEDIR}/lib -L${QTDIR}/lib/ -lqpe -lqte"
            SDL_CFLAGS="$SDL_CFLAGS -DQWS"	  
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS qtopia"
            VIDEO_DRIVERS="$VIDEO_DRIVERS qtopia/libvideo_qtopia.la"
        else
	AC_MSG_ERROR([
*** Failed to find Qtopia includes. Make sure that the QTDIR and QPEDIR
*** environment variables are set correctly.])
        fi
        AC_LANG_C
    fi
}

dnl Set up the PicoGUI video driver if enabled
CheckPicoGUI()
{
    AC_ARG_ENABLE(video-picogui,
[  --enable-video-picogui  use PicoGUI video driver [default=no]],
                  , enable_video_picogui=no)
    if test x$enable_video = xyes -a x$enable_video_picogui = xyes; then
        AC_MSG_CHECKING(for PicoGUI support)
        video_picogui=no
        AC_TRY_COMPILE([
         #include <picogui.h>
        ],[
        ],[
        video_picogui=yes
        ])
        AC_MSG_RESULT($video_picogui)
        if test x$video_picogui = xyes; then
	    SDL_LIBS="$SDL_LIBS -lpgui"
            CFLAGS="$CFLAGS -DENABLE_PICOGUI"
            VIDEO_SUBDIRS="$VIDEO_SUBDIRS picogui"
            VIDEO_DRIVERS="$VIDEO_DRIVERS picogui/libvideo_picogui.la"
        fi
        AC_LANG_C
    fi
}

dnl Set up the Mac toolbox video driver for Mac OS 7-9
CheckTOOLBOX()
{
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS maccommon"
    VIDEO_DRIVERS="$VIDEO_DRIVERS maccommon/libvideo_maccommon.la"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS macrom"
    VIDEO_DRIVERS="$VIDEO_DRIVERS macrom/libvideo_macrom.la"
}

dnl Set up the Mac toolbox video driver for Mac OS X
CheckCARBON()
{
    # "MACOSX" is not an official definition, but it's commonly
    # accepted as a way to differentiate between what runs on X
    # and what runs on older Macs - while in theory "Carbon" defns
    # are consistent between the two, in practice Carbon is still
    # changing. -sts Aug 2000
    mac_autoconf_target_workaround="MAC"
    CFLAGS="$CFLAGS -I/System/Library/Frameworks/Carbon.framework/Headers \
      -fpascal-strings -DENABLE_TOOLBOX -DMACOSX -DTARGET_API_${mac_autoconf_target_workaround}_CARBON=1 -I\$(top_srcdir)/src/video/maccommon -I\$(top_srcdir)/src/video/macrom -I\$(top_srcdir)/src/video/macdsp"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS maccommon"
    VIDEO_DRIVERS="$VIDEO_DRIVERS maccommon/libvideo_maccommon.la"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS macrom"
    VIDEO_DRIVERS="$VIDEO_DRIVERS macrom/libvideo_macrom.la"
}

dnl Set up the Mac toolbox video driver for Mac OS X
CheckQUARTZ()
{
    # "MACOSX" is not an official definition, but it's commonly
    # accepted as a way to differentiate between what runs on X
    # and what runs on older Macs - while in theory "Carbon" defns
    # are consistent between the two, in practice Carbon is still
    # changing. -sts Aug 2000
    mac_autoconf_target_workaround="MAC"
    CFLAGS="$CFLAGS -I/System/Library/Frameworks/Carbon.framework/Headers \
      -I/System/Library/Frameworks/Cocoa.framework/Headers -fpascal-strings \
      -DENABLE_QUARTZ -DMACOSX -DTARGET_API_${mac_autoconf_target_workaround}_CARBON=1 -I\$(top_srcdir)/src/video/quartz"
    VIDEO_SUBDIRS="$VIDEO_SUBDIRS quartz"
    VIDEO_DRIVERS="$VIDEO_DRIVERS quartz/libvideo_quartz.la"
}

dnl Check for the dlfcn.h interface for dynamically loading objects
CheckDLOPEN()
{
    AC_ARG_ENABLE(sdl-dlopen,
[  --enable-sdl-dlopen     use dlopen for shared object loading [default=yes]],
                  , enable_sdl_dlopen=yes)
    if test x$enable_sdl_dlopen = xyes; then
        AC_MSG_CHECKING(for dlopen)
        use_dlopen=no
        AC_TRY_COMPILE([
         #include <dlfcn.h>
        ],[
        ],[
        use_dlopen=yes
        ])
        AC_MSG_RESULT($use_dlopen)

        if test x$use_dlopen = xyes; then
            CFLAGS="$CFLAGS -DUSE_DLOPEN"
            AC_CHECK_LIB(c, dlopen, SYSTEM_LIBS="$SYSTEM_LIBS",
               AC_CHECK_LIB(dl, dlopen, SYSTEM_LIBS="$SYSTEM_LIBS -ldl",
                  AC_CHECK_LIB(ltdl, dlopen, SYSTEM_LIBS="$SYSTEM_LIBS -lltdl")))
        fi
    fi
}

dnl Set up the Atari LDG (shared object loader)
CheckAtariLdg()
{
    AC_ARG_ENABLE(atari-ldg,
[  --enable-atari-ldg      use Atari LDG for shared object loading [default=yes]],
                  , enable_atari_ldg=yes)
    if test x$video_gem = xyes -a x$enable_atari_ldg = xyes; then
        AC_CHECK_HEADER(ldg.h, have_ldg_hdr=yes)
        AC_CHECK_LIB(ldg, ldg_open, have_ldg_lib=yes, have_ldg_lib=no, -lgem)
        if test x$have_ldg_hdr = xyes -a x$have_ldg_lib = xyes; then
            CFLAGS="$CFLAGS -DENABLE_LDG"
            SYSTEM_LIBS="$SYSTEM_LIBS -lldg"
        fi
    fi
}

dnl Check for the usbhid(3) library on *BSD
CheckUSBHID()
{
    if test x$enable_joystick = xyes; then
        have_libusbhid=no
        have_libusb=no
        AC_CHECK_LIB(usbhid, hid_init, have_libusbhid=yes)
        AC_CHECK_LIB(usb, hid_init, have_libusb=yes)
        if test x$have_libusbhid = xyes; then
            SYSTEM_LIBS="$SYSTEM_LIBS -lusbhid"
        fi
        if test x$have_libusb = xyes; then
            SYSTEM_LIBS="$SYSTEM_LIBS -lusb"
        fi

        AC_CHECK_HEADER(usb.h, have_usb_h=yes)
        AC_CHECK_HEADER(usbhid.h, have_usbhid_h=yes)
        AC_CHECK_HEADER(libusb.h, have_libusb_h=yes)
        AC_CHECK_HEADER(libusbhid.h, have_libusbhid_h=yes)
        if test x$have_usb_h = xyes; then
            CFLAGS="$CFLAGS -DHAVE_USB_H"
        fi
        if test x$have_usbhid_h = xyes; then
            CFLAGS="$CFLAGS -DHAVE_USBHID_H"
        fi
        if test x$have_libusb_h = xyes; then
            CFLAGS="$CFLAGS -DHAVE_LIBUSB_H"
        fi
        if test x$have_libusbhid_h = xyes; then
            CFLAGS="$CFLAGS -DHAVE_LIBUSBHID_H"
        fi

        AC_MSG_CHECKING(for usbhid)
        have_usbhid=no
        AC_TRY_COMPILE([
          #include <sys/types.h>
          #if defined(HAVE_USB_H)
          #include <usb.h>
          #endif
          #include <dev/usb/usb.h>
          #include <dev/usb/usbhid.h>
          #if defined(HAVE_USBHID_H)
          #include <usbhid.h>
          #elif defined(HAVE_LIBUSB_H)
          #include <libusb.h>
          #elif defined(HAVE_LIBUSBHID_H)
          #include <libusbhid.h>
          #endif
        ],[
          struct report_desc *repdesc;
          struct usb_ctl_report *repbuf;
          hid_kind_t hidkind;
        ],[
        have_usbhid=yes
        ])
        AC_MSG_RESULT($have_usbhid)

        if test x$have_usbhid = xyes; then
            AC_MSG_CHECKING(for ucr_data member of usb_ctl_report)
            have_usbhid_ucr_data=no
            AC_TRY_COMPILE([
              #include <sys/types.h>
              #if defined(HAVE_USB_H)
              #include <usb.h>
              #endif
              #include <dev/usb/usb.h>
              #include <dev/usb/usbhid.h>
              #if defined(HAVE_USBHID_H)
              #include <usbhid.h>
              #elif defined(HAVE_LIBUSB_H)
              #include <libusb.h>
              #elif defined(HAVE_LIBUSBHID_H)
              #include <libusbhid.h>
              #endif
            ],[
              struct usb_ctl_report buf;
              if (buf.ucr_data) { }
            ],[
            have_usbhid_ucr_data=yes
            ])
            if test x$have_usbhid_ucr_data = xyes; then
                CFLAGS="$CFLAGS -DUSBHID_UCR_DATA"
            fi
            AC_MSG_RESULT($have_usbhid_ucr_data)
            
	    AC_MSG_CHECKING(for new usbhid API)
            have_usbhid_new=no
            AC_TRY_COMPILE([
              #include <sys/types.h>
              #if defined(HAVE_USB_H)
              #include <usb.h>
              #endif
              #include <dev/usb/usb.h>
              #include <dev/usb/usbhid.h>
              #if defined(HAVE_USBHID_H)
              #include <usbhid.h>
              #elif defined(HAVE_LIBUSB_H)
              #include <libusb.h>
              #elif defined(HAVE_LIBUSBHID_H)
              #include <libusbhid.h>
              #endif
            ],[
              report_desc_t d;
	      hid_start_parse(d, 1, 1);
            ],[
            have_usbhid_new=yes
            ])
            if test x$have_usbhid_new = xyes; then
                CFLAGS="$CFLAGS -DUSBHID_NEW"
            fi
            AC_MSG_RESULT($have_usbhid_new)

            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS bsd"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS bsd/libjoystick_bsd.la"
        fi
    fi
}

dnl Check for altivec instruction support using gas syntax
CheckAltivec()
{
    AC_MSG_CHECKING(for GCC Altivec instruction support)
    have_gcc_altivec=no
    AC_TRY_COMPILE([
    ],[
        asm volatile ("mtspr 256, %0\n\t"
                      "vand %%v0, %%v0, %%v0"
                      :
                      : "r" (-1));
    ],[
    have_gcc_altivec=yes
    ])
    if test x$have_gcc_altivec = xyes; then
        CFLAGS="$CFLAGS -DGCC_ALTIVEC"
    fi
    AC_MSG_RESULT($have_gcc_altivec)
}

case "$target" in
    *-*-linux*|*-*-gnu*|*-*-k*bsd*-gnu)
        case "$target" in
          *-*-linux*) ARCH=linux ;;
          *-*-kfreebsd*-gnu) ARCH=kfreebsd-gnu ;;
          *-*-knetbsd*-gnu) ARCH=knetbsd-gnu ;;
          *-*-kopenbsd*-gnu) ARCH=kopenbsd-gnu ;;
          *-*-gnu*) ARCH=gnu ;; # must be last
        esac
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNASM
        CheckOSS
        CheckALSA
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckNANOX
        CheckDGA
        CheckFBCON
        CheckDirectFB
        CheckPS2GS
        CheckGGI
        CheckSVGA
        CheckAAlib
        CheckQtopia
        CheckPicoGUI
        CheckOpenGL
        CheckInputEvents
        CheckPTHREAD
        CheckAltivec
        # Set up files for the main() stub
        if test "x$video_qtopia" = "xyes"; then
          SDL_CFLAGS="$SDL_CFLAGS -Dmain=SDL_main"
          SDL_LIBS="-lSDLmain $SDL_LIBS"
        fi
        # Set up files for the audio library
        # We use the OSS and ALSA API's, not the Sun audio API
        #if test x$enable_audio = xyes; then
        #    CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
        #    AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
        #    AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        #fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
	  case $ARCH in
	    linux)
              JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS linux"
              JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS linux/libjoystick_linux.la"
	    ;;
	    gnu)
              JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
              JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
	    ;;
	    k*bsd-gnu)
              JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS bsd"
              JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS bsd/libjoystick_bsd.la"
	    ;;
	  esac
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
	  case $ARCH in
	    linux)
              CDROM_SUBDIRS="$CDROM_SUBDIRS linux"
              CDROM_DRIVERS="$CDROM_DRIVERS linux/libcdrom_linux.la"
	    ;;
	    gnu)
              CDROM_SUBDIRS="$CDROM_SUBDIRS dummy"
              CDROM_DRIVERS="$CDROM_DRIVERS dummy/libcdrom_dummy.la"
	    ;;
	    kfreebsd-gnu)
              CDROM_SUBDIRS="$CDROM_SUBDIRS freebsd"
              CDROM_DRIVERS="$CDROM_DRIVERS freebsd/libcdrom_freebsd.la"
	    ;;
	    knetbsd-gnu|kopenbsd-gnu)
              CDROM_SUBDIRS="$CDROM_SUBDIRS openbsd"
              CDROM_DRIVERS="$CDROM_DRIVERS openbsd/libcdrom_openbsd.la"
	    ;;
	  esac
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-bsdi*)
        ARCH=bsdi
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNASM
        CheckOSS
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckDGA
        CheckSVGA
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        # Set up files for the audio library
        # We use the OSS and ALSA API's, not the Sun audio API
        #if test x$enable_audio = xyes; then
        #    CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
        #    AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
        #    AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        #fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS bsdi"
            CDROM_DRIVERS="$CDROM_DRIVERS bsdi/libcdrom_bsdi.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-freebsd*)
        ARCH=freebsd
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckVGL
        CheckNASM
        CheckOSS
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckDGA
        CheckSVGA
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        CheckUSBHID
        # Set up files for the audio library
        # We use the OSS and ALSA API's, not the Sun audio API
        #if test x$enable_audio = xyes; then
        #    CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
        #    AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
        #    AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        #fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS freebsd"
            CDROM_DRIVERS="$CDROM_DRIVERS freebsd/libcdrom_freebsd.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-netbsd*)
        ARCH=netbsd
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNASM
        CheckOSS
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        CheckUSBHID
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
            AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS openbsd"
            CDROM_DRIVERS="$CDROM_DRIVERS openbsd/libcdrom_openbsd.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            if test x$use_pthreads = xyes; then
                CFLAGS="$CFLAGS -D_POSIX_THREAD_SYSCALL_SOFT=1"
            fi
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        # NetBSD does not define "unix"
        CFLAGS="$CFLAGS -Dunix"
        ;;
    *-*-openbsd*)
        ARCH=openbsd
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNASM
        CheckOSS
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        CheckUSBHID
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -DOPENBSD_AUDIO_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS openbsd"
            AUDIO_DRIVERS="$AUDIO_DRIVERS openbsd/libaudio_openbsd.la"
        fi
        # OpenBSD needs linking with ossaudio emulation library
        if test x$have_oss = xyes; then
            SYSTEM_LIBS="$SYSTEM_LIBS -lossaudio"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS openbsd"
            CDROM_DRIVERS="$CDROM_DRIVERS openbsd/libcdrom_openbsd.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        # OpenBSD does not define "unix"
        CFLAGS="$CFLAGS -Dunix"
        ;;
    *-*-sysv5*)
        ARCH=sysv5
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNASM
        CheckOSS
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
            AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS dummy"
            CDROM_DRIVERS="$CDROM_DRIVERS dummy/libcdrom_dummy.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-solaris*)
        ARCH=solaris
        CFLAGS="$CFLAGS -D__ELF__" # Fix for nasm on Solaris x86
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNASM
        CheckOSS
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
            AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS linux"
            CDROM_DRIVERS="$CDROM_DRIVERS linux/libcdrom_linux.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-irix*)
        ARCH=irix
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckDMEDIA
        CheckESD
        CheckNAS
        CheckX11
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        # We use the dmedia audio API, not the Sun audio API
        #if test x$enable_audio = xyes; then
        #    CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
        #    AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
        #    AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        #fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        # (No CD-ROM support yet)
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS dummy"
            CDROM_DRIVERS="$CDROM_DRIVERS dummy/libcdrom_dummy.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            if test x$use_pthreads = xyes -o x$use_pth = xyes; then
                CopyUnixThreadSource
            else
                COPY_ARCH_SRC(src/thread, irix, SDL_systhread.c)
                COPY_ARCH_SRC(src/thread, irix, SDL_systhread_c.h)
                COPY_ARCH_SRC(src/thread, linux, SDL_sysmutex.c)
                COPY_ARCH_SRC(src/thread, linux, SDL_sysmutex_c.h)
                COPY_ARCH_SRC(src/thread, linux, SDL_syssem.c)
                COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
                COPY_ARCH_SRC(src/thread, generic, SDL_syscond.c)
                COPY_ARCH_SRC(src/thread, generic, SDL_syscond_c.h)
            fi
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-hpux*)
        ARCH=hpux
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckOSS
        CheckNAS
        CheckX11
        CheckGGI
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
            AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
        fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        # (No CD-ROM support yet)
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS dummy"
            CDROM_DRIVERS="$CDROM_DRIVERS dummy/libcdrom_dummy.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-aix*)
        ARCH=aix
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckOSS
        CheckNAS
        CheckX11
        CheckGGI
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS paudio"
            AUDIO_DRIVERS="$AUDIO_DRIVERS paudio/libaudio_paudio.la"
        fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS aix"
            CDROM_DRIVERS="$CDROM_DRIVERS aix/libcdrom_aix.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-osf*)
        ARCH=osf
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNAS
        CheckX11
        CheckGGI
        CheckAAlib
        CheckOpenGL
        CheckPTHREAD
        SDL_LIBS="$SDL_LIBS -lrt"
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -I/usr/include/mme -DMMEAUDIO_SUPPORT"
            SYSTEM_LIBS="$SYSTEM_LIBS -lmme"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS mme"
            AUDIO_DRIVERS="$AUDIO_DRIVERS mme/libaudio_mme.la"
        fi
        # Set up files for the joystick library
        # (No joystick support yet)
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        # (No cdrom support yet)
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS osf"
            CDROM_DRIVERS="$CDROM_DRIVERS osf/libcdrom_osf.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-qnx*)
        ARCH=qnx
        CheckDummyVideo
        CheckDiskAudio
        CheckDLOPEN
        CheckNAS
        CheckPHOTON
        CheckX11
        CheckOpenGL
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            CFLAGS="$CFLAGS -DQNXNTOAUDIO_SUPPORT"
            SYSTEM_LIBS="$SYSTEM_LIBS -lasound"
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS nto"
            AUDIO_DRIVERS="$AUDIO_DRIVERS nto/libaudio_nto.la"
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
        # (No joystick support yet)
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS dummy"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS dummy/libjoystick_dummy.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS qnx"
            CDROM_DRIVERS="$CDROM_DRIVERS qnx/libcdrom_qnx.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        ;;
    *-*-cygwin* | *-*-mingw32*)
        ARCH=win32
        if test "$build" != "$target"; then # cross-compiling
            # Default cross-compile location
            ac_default_prefix=/usr/local/cross-tools/i386-mingw32msvc
        else
            # Look for the location of the tools and install there
            if test "$BUILD_PREFIX" != ""; then
                ac_default_prefix=$BUILD_PREFIX
            fi
        fi
        CheckDummyVideo
        CheckDiskAudio
        CheckWIN32
        CheckDIRECTX
        CheckNASM
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS windib"
            AUDIO_DRIVERS="$AUDIO_DRIVERS windib/libaudio_windib.la"
            if test x$use_directx = xyes; then
                AUDIO_SUBDIRS="$AUDIO_SUBDIRS windx5"
                AUDIO_DRIVERS="$AUDIO_DRIVERS windx5/libaudio_windx5.la"
            fi
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS win32"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS win32/libjoystick_winmm.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS win32"
            CDROM_DRIVERS="$CDROM_DRIVERS win32/libcdrom_win32.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            COPY_ARCH_SRC(src/thread, win32, SDL_systhread.c)
            COPY_ARCH_SRC(src/thread, win32, SDL_systhread_c.h)
            COPY_ARCH_SRC(src/thread, win32, SDL_sysmutex.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex_c.h)
            COPY_ARCH_SRC(src/thread, win32, SDL_syssem.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond_c.h)
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, win32, SDL_systimer.c)
        fi
        # The Win32 platform requires special setup
        SDL_CFLAGS="$SDL_CFLAGS -Dmain=SDL_main"
        case "$target" in
            *-*-cygwin*)
                CFLAGS="$CFLAGS -I/usr/include/mingw -DWIN32 -Uunix -mno-cygwin"
                SDL_CFLAGS="$SDL_CFLAGS -I/usr/include/mingw -DWIN32 -Uunix -mno-cygwin"
                LIBS="$LIBS -mno-cygwin"
                SDL_LIBS="-lmingw32 -lSDLmain $SDL_LIBS -mwindows -mno-cygwin"
                ;;
            *-*-mingw32*)
                SDL_LIBS="-lmingw32 -lSDLmain $SDL_LIBS -mwindows"
                ;;
        esac
        ;;
    *-*-beos*)
        ARCH=beos
        ac_default_prefix=/boot/develop/tools/gnupro
        CheckDummyVideo
        CheckDiskAudio
        CheckNASM
        CheckBWINDOW
        CheckBeGL
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS baudio"
            AUDIO_DRIVERS="$AUDIO_DRIVERS baudio/libaudio_baudio.la"
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS beos"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS beos/libjoystick_beos.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS beos"
            CDROM_DRIVERS="$CDROM_DRIVERS beos/libcdrom_beos.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            COPY_ARCH_SRC(src/thread, beos, SDL_systhread.c)
            COPY_ARCH_SRC(src/thread, beos, SDL_systhread_c.h)
            COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex_c.h)
            COPY_ARCH_SRC(src/thread, beos, SDL_syssem.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond_c.h)
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, beos, SDL_systimer.c)
        fi
        # The BeOS platform requires special libraries
        SYSTEM_LIBS="$SYSTEM_LIBS -lroot -lbe -lmedia -lgame -ldevice -ltextencoding"
        ;;
    *-*-macos*)
        # This would be used if cross-compiling to MacOS 9.  No way to
        # use it at present, but Apple is working on a X-to-9 compiler
        # for which this case would be handy.
        ARCH=macos
        CheckDummyVideo
        CheckDiskAudio
        CheckTOOLBOX
        CheckMacGL
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS macrom"
            AUDIO_DRIVERS="$AUDIO_DRIVERS macrom/libaudio_macrom.la"
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS macos"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS macos/libjoystick_macos.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS macos"
            CDROM_DRIVERS="$CDROM_DRIVERS macos/libcdrom_macos.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            COPY_ARCH_SRC(src/thread, macos, SDL_systhread.c)
            COPY_ARCH_SRC(src/thread, macos, SDL_systhread_c.h)
            COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_sysmutex_c.h)
            COPY_ARCH_SRC(src/thread, macos, SDL_syssem.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_syssem_c.h)
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond.c)
            COPY_ARCH_SRC(src/thread, generic, SDL_syscond_c.h)
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, macos, SDL_systimer.c)
        fi
        # The MacOS platform requires special setup
        SDL_CFLAGS="$SDL_CFLAGS -Dmain=SDL_main"
        SDL_LIBS="-lSDLmain $SDL_LIBS"
        ;;
    *-*-darwin* )
        # Strictly speaking, we want "Mac OS X", not "Darwin", which is
        # just the OS X kernel sans upper layers like Carbon and Cocoa.
        # But config.guess comes back with "darwin", so go with the flow.
        ARCH=macosx
        CheckDummyVideo
        CheckDiskAudio
        CheckQUARTZ
        CheckMacGL
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AUDIO_SUBDIRS="$AUDIO_SUBDIRS macrom"
            AUDIO_DRIVERS="$AUDIO_DRIVERS macrom/libaudio_macrom.la"
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS darwin"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS darwin/libjoystick_darwin.la"
            SYSTEM_LIBS="$SYSTEM_LIBS -framework IOKit"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS macosx"
            CDROM_DRIVERS="$CDROM_DRIVERS macosx/libcdrom_macosx.la"
            SYSTEM_LIBS="$SYSTEM_LIBS -framework AudioToolbox -framework AudioUnit -lstdc++"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
        fi
        # The MacOS X platform requires special setup.
        SDL_LIBS="-lSDLmain $SDL_LIBS"
        # The Cocoa backend still needs Carbon, and the YUV code QuickTime
        SYSTEM_LIBS="$SYSTEM_LIBS -framework Cocoa -framework Carbon -framework QuickTime"
        ;;
    *-*-mint*)
        ARCH=mint
        CheckDummyVideo
        CheckDiskAudio
        CheckAtariBiosEvent
        CheckAtariXbiosVideo
        CheckAtariGemVideo
        CheckAtariAudio
        CheckAtariLdg
        CheckPTH
        # Set up files for the audio library
        if test x$enable_threads = xyes -a x$enable_pth = xyes; then
            if test x$enable_audio = xyes; then
                CFLAGS="$CFLAGS -DSUNAUDIO_SUPPORT"
                AUDIO_SUBDIRS="$AUDIO_SUBDIRS sun"
                AUDIO_DRIVERS="$AUDIO_DRIVERS sun/libaudio_sun.la"
            fi
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS mint"
            JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS mint/libjoystick_mint.la"
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS mint"
            CDROM_DRIVERS="$CDROM_DRIVERS mint/libcdrom_mint.la"
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            CopyUnixThreadSource
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            if test x$enable_threads = xyes -a x$enable_pth = xyes; then
                COPY_ARCH_SRC(src/timer, linux, SDL_systimer.c)
            else
                COPY_ARCH_SRC(src/timer, mint, SDL_systimer.c)
            fi
        fi
        # MiNT does not define "unix"
        CFLAGS="$CFLAGS -Dunix"
        ;;
    *-*-riscos)
        ARCH=riscos
        JOYSTICK_SUBDIRS="$JOYSTICK_SUBDIRS riscos"
        JOYSTICK_DRIVERS="$JOYSTICK_DRIVERS riscos/libjoystick_riscos.la"
        COPY_ARCH_SRC(src/timer, riscos, SDL_systimer.c)
        VIDEO_SUBDIRS="$VIDEO_SUBDIRS riscos"
        VIDEO_DRIVERS="$VIDEO_DRIVERS riscos/libvideo_riscos.la"
        AUDIO_SUBDIRS="$AUDIO_SUBDIRS riscos"
        AUDIO_DRIVERS="$AUDIO_DRIVERS riscos/libaudio_riscos.la"

        if test x$enable_cdrom = xyes; then
            CDROM_SUBDIRS="$CDROM_SUBDIRS dummy"
            CDROM_DRIVERS="$CDROM_DRIVERS dummy/libcdrom_dummy.la"
        fi

        CFLAGS="$CFLAGS -DDISABLE_THREADS -DENABLE_RISCOS -DDRENDERER_SUPPORT"

        SYSTEM_LIBS="$SYSTEM_LIBS -ljpeg -ltiff -lpng -lz"
        ;;
    *)
        AC_MSG_ERROR(Unsupported target:  Please add to configure.in)
        ;;
esac
AC_SUBST(ARCH)

# Set the conditional variables for this target
AM_CONDITIONAL(TARGET_LINUX, test $ARCH = linux)
AM_CONDITIONAL(TARGET_QTOPIA, test "x$video_qtopia" = "xyes")
AM_CONDITIONAL(TARGET_SOLARIS, test $ARCH = solaris)
AM_CONDITIONAL(TARGET_IRIX, test $ARCH = irix)
AM_CONDITIONAL(TARGET_BSDI, test $ARCH = bsdi)
AM_CONDITIONAL(TARGET_FREEBSD, test $ARCH = freebsd)
AM_CONDITIONAL(TARGET_NETBSD, test $ARCH = netbsd)
AM_CONDITIONAL(TARGET_OPENBSD, test $ARCH = openbsd)
AM_CONDITIONAL(TARGET_AIX, test $ARCH = aix)
AM_CONDITIONAL(TARGET_WIN32, test $ARCH = win32)
AM_CONDITIONAL(TARGET_BEOS, test $ARCH = beos)
AM_CONDITIONAL(TARGET_MACOS, test $ARCH = macos)
AM_CONDITIONAL(TARGET_MACOSX, test $ARCH = macosx)
AM_CONDITIONAL(TARGET_QNX, test $ARCH = qnx)
AM_CONDITIONAL(TARGET_MINT, test $ARCH = mint)

# More automake conditionals
AM_CONDITIONAL(USE_DIRECTX, test x$use_directx = xyes)
AM_CONDITIONAL(USE_CLONE, test x$use_clone = xyes)
AM_CONDITIONAL(HAVE_NASM, test x$use_nasm = xyes)

# Set conditional variables for shared and static library selection.
# These are not used in any Makefile.am but in sdl-config.in.
AM_CONDITIONAL([ENABLE_SHARED], [test "$enable_shared" = yes])
AM_CONDITIONAL([ENABLE_STATIC], [test "$enable_static" = yes])

# Set runtime shared library paths as needed

if test $ARCH = linux -o $ARCH = freebsd -o $ARCH = bsdi; then
  SDL_RLD_FLAGS="-Wl,-rpath,\${exec_prefix}/lib"
fi
if test $ARCH = solaris; then
  SDL_RLD_FLAGS="-R\${exec_prefix}/lib"
fi

case "$ARCH" in
  openbsd | netbsd | bsdi)
    SHARED_SYSTEM_LIBS="$SYSTEM_LIBS"
    ;;
  qnx)
    SHARED_SYSTEM_LIBS="$SYSTEM_LIBS"
    ;;
  macosx)
    SHARED_SYSTEM_LIBS="-framework Cocoa"
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
      SHARED_SYSTEM_LIBS="$SHARED_SYSTEM_LIBS -framework OpenGL"
    fi
    ;;
  *)
    SHARED_SYSTEM_LIBS=""
    ;;
esac

case "$ARCH" in
  macosx)
    # Evil hack to allow static linking on Mac OS X
    SDL_STATIC_LIBS="\${exec_prefix}/lib/libSDLmain.a \${exec_prefix}/lib/libSDL.a"
    ;;
  *)
    SDL_STATIC_LIBS="$SDL_LIBS"
    ;;
esac


STATIC_SYSTEM_LIBS="$SYSTEM_LIBS"

dnl Output the video drivers we use
if test x$enable_video = xtrue; then
    if test "$VIDEO_SUBDIRS" = ""; then
        AC_MSG_ERROR(*** No video drivers are enabled!)
    fi
fi
AC_SUBST(AUDIO_SUBDIRS)
AC_SUBST(AUDIO_DRIVERS)
AC_SUBST(VIDEO_SUBDIRS)
AC_SUBST(VIDEO_DRIVERS)
AC_SUBST(JOYSTICK_SUBDIRS)
AC_SUBST(JOYSTICK_DRIVERS)
AC_SUBST(CDROM_SUBDIRS)
AC_SUBST(CDROM_DRIVERS)
AC_SUBST(SDL_EXTRADIRS)
AC_SUBST(SDL_EXTRALIBS)

dnl Expand the cflags and libraries needed by apps using SDL
AC_SUBST(SDL_CFLAGS)
AC_SUBST(SDL_LIBS)
AC_SUBST(SDL_STATIC_LIBS)
AC_SUBST(SDL_RLD_FLAGS)

dnl Expand the libraries needed for static and dynamic linking
AC_SUBST(STATIC_SYSTEM_LIBS)
AC_SUBST(SHARED_SYSTEM_LIBS)
AC_SUBST(SYSTEM_LIBS)

dnl Expand the include directories for building SDL
CFLAGS="$CFLAGS -I\$(top_srcdir)/include"
CFLAGS="$CFLAGS -I\$(top_srcdir)/include/SDL"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src -I\$(top_srcdir)/src/main/$ARCH"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/audio"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/video"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/video/XFree86/extensions"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/events"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/joystick"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/cdrom"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/thread"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/timer"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/endian"
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/file"
CFLAGS="$CFLAGS -I\$(top_builddir)/src/thread"
CXXFLAGS="$CFLAGS"


# Check for darwin at the very end and set up the Objective C compiler
# We do this here so that we get the full CFLAGS into OBJCFLAGS
case "$target" in
    *-*-darwin*)
        dnl AC_PROG_OBJC doesn't seem to exist, this is the SDL workaround
        AC_MSG_CHECKING(for an Objective-C compiler)
        OBJC="$CC"
        AC_SUBST(OBJC)
        OBJCFLAGS="$CFLAGS"
        AC_SUBST(OBJCFLAGS)
        dnl _AM_DEPENDENCIES(OBJC) doesn't work, so hard code OBJCDEPMODE here
        dnl _AM_DEPENDENCIES(OBJC)
        dnl Of course, hard coding doesn't work for some versions of automake
        OBJCDEPMODE="depmode=gcc"
        AC_SUBST(OBJCDEPMODE)
        dnl Trying this to satisfy everybody...
        AC_MSG_RESULT(not implemented yet)
        ;;
esac

# Finally create all the generated files
dnl Important: Any directory that you want to be in the distcheck should
dnl            have a file listed here, so that configure generates the
dnl            subdirectories on the build target.
AC_OUTPUT([
Makefile
docs/Makefile
docs/html/Makefile
docs/man3/Makefile
include/Makefile
src/Makefile
src/main/Makefile
src/main/macosx/Makefile
src/main/macosx/Info.plist
src/audio/Makefile
src/audio/alsa/Makefile
src/audio/arts/Makefile
src/audio/baudio/Makefile
src/audio/dc/Makefile
src/audio/disk/Makefile
src/audio/dma/Makefile
src/audio/dmedia/Makefile
src/audio/dsp/Makefile
src/audio/esd/Makefile
src/audio/macrom/Makefile
src/audio/mint/Makefile
src/audio/mme/Makefile
src/audio/nas/Makefile
src/audio/nto/Makefile
src/audio/openbsd/Makefile
src/audio/paudio/Makefile
src/audio/riscos/Makefile
src/audio/sun/Makefile
src/audio/ums/Makefile
src/audio/windib/Makefile
src/audio/windx5/Makefile
src/video/Makefile
src/video/aalib/Makefile
src/video/ataricommon/Makefile
src/video/bwindow/Makefile
src/video/cybergfx/Makefile
src/video/dc/Makefile
src/video/dga/Makefile
src/video/directfb/Makefile
src/video/dummy/Makefile
src/video/epoc/Makefile
src/video/fbcon/Makefile
src/video/gem/Makefile
src/video/ggi/Makefile
src/video/maccommon/Makefile
src/video/macdsp/Makefile
src/video/macrom/Makefile
src/video/nanox/Makefile
src/video/photon/Makefile
src/video/picogui/Makefile
src/video/ps2gs/Makefile
src/video/qtopia/Makefile
src/video/quartz/Makefile
src/video/riscos/Makefile
src/video/svga/Makefile
src/video/vgl/Makefile
src/video/wincommon/Makefile
src/video/windib/Makefile
src/video/windx5/Makefile
src/video/x11/Makefile
src/video/xbios/Makefile
src/video/XFree86/Makefile
src/video/XFree86/extensions/Makefile
src/video/XFree86/Xinerama/Makefile
src/video/XFree86/Xv/Makefile
src/video/XFree86/Xxf86dga/Makefile
src/video/XFree86/Xxf86vm/Makefile
src/events/Makefile
src/joystick/Makefile
src/joystick/amigaos/Makefile
src/joystick/beos/Makefile
src/joystick/bsd/Makefile
src/joystick/darwin/Makefile
src/joystick/dc/Makefile
src/joystick/dummy/Makefile
src/joystick/linux/Makefile
src/joystick/macos/Makefile
src/joystick/mint/Makefile
src/joystick/riscos/Makefile
src/joystick/win32/Makefile
src/cdrom/Makefile
src/cdrom/aix/Makefile
src/cdrom/beos/Makefile
src/cdrom/dc/Makefile
src/cdrom/dummy/Makefile
src/cdrom/bsdi/Makefile
src/cdrom/freebsd/Makefile
src/cdrom/linux/Makefile
src/cdrom/macos/Makefile
src/cdrom/macosx/Makefile
src/cdrom/mint/Makefile
src/cdrom/openbsd/Makefile
src/cdrom/osf/Makefile
src/cdrom/qnx/Makefile
src/cdrom/win32/Makefile
src/thread/Makefile
src/timer/Makefile
src/endian/Makefile
src/file/Makefile
src/cpuinfo/Makefile
src/hermes/Makefile
sdl-config
SDL.spec
SDL.qpg
], [chmod +x sdl-config])