configure.in

dnl Process this file with autoconf to produce a configure script.
AC_INIT(README)
AC_CONFIG_HEADER(include/SDL_config.h)
AC_GNU_SOURCE

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=3
SDL_MICRO_VERSION=0
SDL_INTERFACE_AGE=0
SDL_BINARY_AGE=0
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 build and host environments
AC_CONFIG_AUX_DIRS($srcdir/build-scripts)
AC_CANONICAL_HOST
AC_C_BIGENDIAN
if test x$ac_cv_c_bigendian = xyes; then
    AC_DEFINE(SDL_BYTEORDER, 4321)
else
    AC_DEFINE(SDL_BYTEORDER, 1234)
fi

dnl Set up the compiler and linker flags
INCLUDE="-I$srcdir/include"
if test x$srcdir != x.; then
    # Remove SDL_config.h from the source directory, since it's the
    # default one, and we want to include the one that we generate.
    if test -f $srcdir/include/SDL_config.h; then
        rm $srcdir/include/SDL_config.h
    fi
    INCLUDE="-Iinclude $INCLUDE"
fi
case "$host" in
    *-*-cygwin*)
        # We build SDL on cygwin without the UNIX emulation layer
        BASE_CFLAGS="-I/usr/include/mingw -mno-cygwin"
        BASE_LDFLAGS="-mno-cygwin"
        ;;
    *)
        BASE_CFLAGS="-D_GNU_SOURCE=1"
        BASE_LDFLAGS=""
        ;;
esac
BUILD_CFLAGS="$CFLAGS $CPPFLAGS"
EXTRA_CFLAGS="$INCLUDE $BASE_CFLAGS"
BUILD_LDFLAGS="$LDFLAGS"
EXTRA_LDFLAGS="$BASE_LDFLAGS"
## These are common directories to find software packages
#for path in /usr/freeware /usr/pkg /usr/X11R6 /usr/local; do
#    if test -d $path/include; then
#        EXTRA_CFLAGS="$EXTRA_CFLAGS -I$path/include"
#    fi
#    if test -d $path/lib; then
#        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$path/lib"
#    fi
#done
SDL_CFLAGS="$BASE_CFLAGS"
SDL_LIBS="-lSDL $BASE_LDFLAGS"
CPPFLAGS="$CPPFLAGS $EXTRA_CFLAGS"
CFLAGS="$CFLAGS $EXTRA_CFLAGS"
LDFLAGS="$LDFLAGS $EXTRA_LDFLAGS"

dnl Check for tools
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
AC_PROG_CC
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_MAKE_SET
if test -z "$host_alias"; then
    hostaliaswindres=
else
    hostaliaswindres="$host_alias-windres"
fi
AC_CHECK_PROGS(WINDRES, [windres $hostaliaswindres $host_os-windres])

dnl Check for compiler characteristics
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE

dnl See whether we are allowed to use the system C library
AC_ARG_ENABLE(libc,
AC_HELP_STRING([--enable-libc], [Use the system C library [[default=yes]]]),
              , enable_libc=yes)
if test x$enable_libc = xyes; then
    AC_DEFINE(HAVE_LIBC)

    dnl Check for C library headers
    AC_HEADER_STDC
    AC_CHECK_HEADERS(sys/types.h stdio.h stdlib.h stddef.h stdarg.h malloc.h memory.h string.h strings.h inttypes.h stdint.h ctype.h math.h iconv.h signal.h)

    dnl Check for typedefs, structures, etc.
    AC_TYPE_SIZE_T
    if test x$ac_cv_header_inttypes_h = xyes -o x$ac_cv_header_stdint_h = xyes; then
        AC_CHECK_TYPE(int64_t)
        if test x$ac_cv_type_int64_t = xyes; then
            AC_DEFINE(SDL_HAS_64BIT_TYPE)
        fi
        have_inttypes=yes
    fi

    dnl Checks for library functions.
    case "$host" in
    *-*-cygwin* | *-*-mingw32*)
        ;;
    *)
        AC_FUNC_ALLOCA
        ;;
    esac

    AC_FUNC_MEMCMP
    if test x$ac_cv_func_memcmp_working = xyes; then
        AC_DEFINE(HAVE_MEMCMP)
    fi
    AC_FUNC_STRTOD
    if test x$ac_cv_func_strtod = xyes; then
        AC_DEFINE(HAVE_STRTOD)
    fi
    AC_CHECK_FUNCS(malloc calloc realloc free getenv putenv unsetenv qsort abs bcopy memset memcpy memmove strlen strlcpy strlcat strdup _strrev _strupr _strlwr strchr strrchr strstr itoa _ltoa _uitoa _ultoa strtol strtoul _i64toa _ui64toa strtoll strtoull atoi atof strcmp strncmp _stricmp strcasecmp _strnicmp strncasecmp sscanf snprintf vsnprintf iconv sigaction setjmp nanosleep)

    AC_CHECK_LIB(iconv, libiconv_open, [EXTRA_LDFLAGS="$EXTRA_LDFLAGS -liconv"])
    AC_CHECK_LIB(m, pow, [EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"])
fi

if test x$have_inttypes != xyes; then
    AC_CHECK_SIZEOF(char, 1)
    AC_CHECK_SIZEOF(short, 2)
    AC_CHECK_SIZEOF(int, 4)
    AC_CHECK_SIZEOF(long, 4)
    AC_CHECK_SIZEOF(long long, 8)
    if test x$ac_cv_sizeof_char = x1; then
        AC_DEFINE(int8_t, signed char)
        AC_DEFINE(uint8_t, unsigned char)
    fi
    if test x$ac_cv_sizeof_short = x2; then
        AC_DEFINE(int16_t, signed short)
        AC_DEFINE(uint16_t, unsigned short)
    else
        if test x$ac_cv_sizeof_int = x2; then
            AC_DEFINE(int16_t, signed int)
            AC_DEFINE(uint16_t, unsigned int)
        fi
    fi
    if test x$ac_cv_sizeof_int = x4; then
        AC_DEFINE(int32_t, signed int)
        AC_DEFINE(uint32_t, unsigned int)
    else
        if test x$ac_cv_sizeof_long = x4; then
            AC_DEFINE(int32_t, signed long)
            AC_DEFINE(uint32_t, unsigned long)
        fi
    fi
    if test x$ac_cv_sizeof_long = x8; then
        AC_DEFINE(int64_t, signed long)
        AC_DEFINE(uint64_t, unsigned long)
        AC_DEFINE(SDL_HAS_64BIT_TYPE)
    else
        if test x$ac_cv_sizeof_long_long = x8; then
            AC_DEFINE(int64_t, signed long long)
            AC_DEFINE(uint64_t, unsigned long long)
            AC_DEFINE(SDL_HAS_64BIT_TYPE)
        fi
    fi
    AC_DEFINE(size_t, unsigned int)
    AC_DEFINE(uintptr_t, unsigned long)
fi

# Standard C sources
SOURCES="$SOURCES $srcdir/src/*.c"
SOURCES="$SOURCES $srcdir/src/audio/*.c"
SOURCES="$SOURCES $srcdir/src/cdrom/*.c"
SOURCES="$SOURCES $srcdir/src/cpuinfo/*.c"
SOURCES="$SOURCES $srcdir/src/events/*.c"
SOURCES="$SOURCES $srcdir/src/file/*.c"
SOURCES="$SOURCES $srcdir/src/stdlib/*.c"
SOURCES="$SOURCES $srcdir/src/thread/*.c"
SOURCES="$SOURCES $srcdir/src/timer/*.c"
SOURCES="$SOURCES $srcdir/src/video/*.c"

dnl Enable/disable various subsystems of the SDL library

AC_ARG_ENABLE(audio,
AC_HELP_STRING([--enable-audio], [Enable the audio subsystem [[default=yes]]]),
              , enable_audio=yes)
if test x$enable_audio != xyes; then
    AC_DEFINE(SDL_AUDIO_DISABLED)
fi
AC_ARG_ENABLE(video,
AC_HELP_STRING([--enable-video], [Enable the video subsystem [[default=yes]]]),
              , enable_video=yes)
if test x$enable_video != xyes; then
    AC_DEFINE(SDL_VIDEO_DISABLED)
fi
AC_ARG_ENABLE(events,
AC_HELP_STRING([--enable-events], [Enable the events subsystem [[default=yes]]]),
              , enable_events=yes)
if test x$enable_events != xyes; then
    AC_DEFINE(SDL_EVENTS_DISABLED)
fi
AC_ARG_ENABLE(joystick,
AC_HELP_STRING([--enable-joystick], [Enable the joystick subsystem [[default=yes]]]),
              , enable_joystick=yes)
if test x$enable_joystick != xyes; then
    AC_DEFINE(SDL_JOYSTICK_DISABLED)
else
    SOURCES="$SOURCES $srcdir/src/joystick/*.c"
fi
AC_ARG_ENABLE(cdrom,
AC_HELP_STRING([--enable-cdrom], [Enable the cdrom subsystem [[default=yes]]]),
              , enable_cdrom=yes)
if test x$enable_cdrom != xyes; then
    AC_DEFINE(SDL_CDROM_DISABLED)
fi
AC_ARG_ENABLE(threads,
AC_HELP_STRING([--enable-threads], [Enable the threading subsystem [[default=yes]]]),
              , enable_threads=yes)
if test x$enable_threads != xyes; then
    AC_DEFINE(SDL_THREADS_DISABLED)
fi
AC_ARG_ENABLE(timers,
AC_HELP_STRING([--enable-timers], [Enable the timer subsystem [[default=yes]]]),
              , enable_timers=yes)
if test x$enable_timers != xyes; then
    AC_DEFINE(SDL_TIMERS_DISABLED)
fi
AC_ARG_ENABLE(file,
AC_HELP_STRING([--enable-file], [Enable the file subsystem [[default=yes]]]),
              , enable_file=yes)
if test x$enable_file != xyes; then
    AC_DEFINE(SDL_FILE_DISABLED)
fi
AC_ARG_ENABLE(loadso,
AC_HELP_STRING([--enable-loadso], [Enable the shared object loading subsystem [[default=yes]]]),
              , enable_loadso=yes)
if test x$enable_loadso != xyes; then
    AC_DEFINE(SDL_LOADSO_DISABLED)
fi
AC_ARG_ENABLE(cpuinfo,
AC_HELP_STRING([--enable-cpuinfo], [Enable the cpuinfo subsystem [[default=yes]]]),
              , enable_cpuinfo=yes)
if test x$enable_cpuinfo != xyes; then
    AC_DEFINE(SDL_CPUINFO_DISABLED)
fi
AC_ARG_ENABLE(assembly,
AC_HELP_STRING([--enable-assembly], [Enable assembly routines [[default=yes]]]),
              , enable_assembly=yes)
if test x$enable_assembly = xyes; then
    AC_DEFINE(SDL_ASSEMBLY_ROUTINES)

    dnl Check for various instruction support
    AC_ARG_ENABLE(mmx,
AC_HELP_STRING([--enable-mmx], [use MMX assembly routines [[default=yes]]]),
                  , enable_mmx=yes)
    if test x$enable_mmx = xyes; then
        save_CFLAGS="$CFLAGS"
        have_gcc_mmx=no
        AC_MSG_CHECKING(for GCC -mmmx option)
        mmx_CFLAGS="-mmmx"
        CFLAGS="$save_CFLAGS $mmx_CFLAGS"

        AC_TRY_COMPILE([
        #include <mmintrin.h>
        ],[
        ],[
        have_gcc_mmx=yes
        ])
        AC_MSG_RESULT($have_gcc_mmx)

        if test x$have_gcc_mmx = xyes; then
            EXTRA_CFLAGS="$EXTRA_CFLAGS $mmx_CFLAGS"
        fi
    fi

    AC_ARG_ENABLE(sse,
AC_HELP_STRING([--enable-sse], [use SSE assembly routines [[default=yes]]]),
                  , enable_sse=yes)
    if test x$enable_sse = xyes; then
        save_CFLAGS="$CFLAGS"
        have_gcc_sse=no
        AC_MSG_CHECKING(for GCC -msse option)
        sse_CFLAGS="-msse"
        CFLAGS="$save_CFLAGS $sse_CFLAGS"

        AC_TRY_COMPILE([
        #include <xmmintrin.h>
        ],[
        ],[
        have_gcc_sse=yes
        ])
        AC_MSG_RESULT($have_gcc_sse)

        if test x$have_gcc_sse = xyes; then
            EXTRA_CFLAGS="$EXTRA_CFLAGS $sse_CFLAGS"
        fi
    fi

    AC_ARG_ENABLE(altivec,
AC_HELP_STRING([--enable-altivec], [use Altivec assembly routines [[default=yes]]]),
                  , enable_altivec=yes)
    if test x$enable_altivec = xyes; then
        have_altivec_h_hdr=no
        AC_CHECK_HEADER(altivec.h, have_altivec_h_hdr=yes)

        save_CFLAGS="$CFLAGS"
        have_gcc_altivec=no
        AC_MSG_CHECKING(for Altivec with GCC -maltivec option)
        altivec_CFLAGS="-maltivec"
        CFLAGS="$save_CFLAGS $altivec_CFLAGS"

        if test x$have_altivec_h_hdr = xyes; then
          AC_TRY_COMPILE([
          #include <altivec.h>
          vector unsigned int vzero() {
              return vec_splat_u32(0);
          }
          ],[
          ],[
          have_gcc_altivec=yes
          ])
          AC_MSG_RESULT($have_gcc_altivec)
        else
          AC_TRY_COMPILE([
          vector unsigned int vzero() {
              return vec_splat_u32(0);
          }
          ],[
          ],[
          have_gcc_altivec=yes
          ])
          AC_MSG_RESULT($have_gcc_altivec)
        fi

        if test x$have_gcc_altivec = xno; then
            AC_MSG_CHECKING(for Altivec with GCC -faltivec option)
            altivec_CFLAGS="-faltivec"
            CFLAGS="$save_CFLAGS $altivec_CFLAGS"
            if test x$have_altivec_h_hdr = xyes; then
              AC_TRY_COMPILE([
              #include <altivec.h>
              vector unsigned int vzero() {
                  return vec_splat_u32(0);
              }
              ],[
              ],[
              have_gcc_altivec=yes
              ])
              AC_MSG_RESULT($have_gcc_altivec)
            else
              AC_TRY_COMPILE([
              vector unsigned int vzero() {
                  return vec_splat_u32(0);
              }
              ],[
              ],[
              have_gcc_altivec=yes
              ])
              AC_MSG_RESULT($have_gcc_altivec)
            fi
        fi
        CFLAGS="$save_CFLAGS"

        if test x$have_gcc_altivec = xyes; then
            AC_DEFINE(SDL_ALTIVEC_BLITTERS)
            if test x$have_altivec_h_hdr = xyes; then
              AC_DEFINE(HAVE_ALTIVEC_H)
            fi
            EXTRA_CFLAGS="$EXTRA_CFLAGS $altivec_CFLAGS"
        fi
    fi
fi

dnl See if the OSS audio interface is supported
CheckOSS()
{
    AC_ARG_ENABLE(oss,
AC_HELP_STRING([--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
            AC_DEFINE(SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H)
            ])
        fi
        AC_MSG_RESULT($have_oss)
        if test x$have_oss = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_OSS)
            SOURCES="$SOURCES $srcdir/src/audio/dsp/*.c"
            SOURCES="$SOURCES $srcdir/src/audio/dma/*.c"
            have_audio=yes

            # We may need to link with ossaudio emulation library
            case "$host" in
                *-*-openbsd*|*-*-netbsd*)
                    EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lossaudio";;
            esac
        fi
    fi
}

dnl See if the ALSA audio interface is supported
CheckALSA()
{
    AC_ARG_ENABLE(alsa,
AC_HELP_STRING([--enable-alsa], [support the ALSA audio API [[default=yes]]]),
                  , enable_alsa=yes)
    if test x$enable_audio = xyes -a x$enable_alsa = xyes; then
        AM_PATH_ALSA(0.9.0, have_alsa=yes, have_alsa=no)
        # Restore all flags from before the ALSA detection runs
        CFLAGS="$alsa_save_CFLAGS"
        LDFLAGS="$alsa_save_LDFLAGS"
        LIBS="$alsa_save_LIBS"
        if test x$have_alsa = xyes; then
            AC_ARG_ENABLE(alsa-shared,
AC_HELP_STRING([--enable-alsa-shared], [dynamically load ALSA audio support [[default=yes]]]),
                          , enable_alsa_shared=yes)
            if test "x`echo $ALSA_LIBS | grep -- -L`" = "x"; then
                if test "x`ls /lib/libasound.so.* 2> /dev/null`" != "x"; then
                    ALSA_LIBS="-L/lib $ALSA_LIBS"
                elif test "x`ls /usr/lib/libasound.so.* 2> /dev/null`" != "x"; then
                    ALSA_LIBS="-L/usr/lib $ALSA_LIBS"
                elif test "x`ls /usr/local/lib/libasound.so.* 2> /dev/null`" != "x"; then
                    ALSA_LIBS="-L/usr/local/lib $ALSA_LIBS"
                fi
            fi
            alsa_lib_spec=`echo $ALSA_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libasound.so.*/'`
            alsa_lib=`ls -- $alsa_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
            echo "-- $alsa_lib_spec -> $alsa_lib"

            AC_DEFINE(SDL_AUDIO_DRIVER_ALSA)
            SOURCES="$SOURCES $srcdir/src/audio/alsa/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $ALSA_CFLAGS"
            if test x$have_loadso != xyes && \
               test x$enable_alsa_shared = xyes; then
                AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic ALSA loading])
            fi
            if test x$have_loadso = xyes && \
               test x$enable_alsa_shared = xyes && test x$alsa_lib != x; then
                AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_ALSA_DYNAMIC, "$alsa_lib")
            else
                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $ALSA_LIBS"
            fi
            have_audio=yes
        fi
    fi
}

dnl Check whether we want to use IRIX 6.5+ native audio or not
CheckDMEDIA()
{
    if test x$enable_audio = xyes; then
        AC_MSG_CHECKING(for dmedia audio support)
        have_dmedia=no
        AC_TRY_COMPILE([
          #include <dmedia/audio.h>
        ],[
          ALport audio_port;
        ],[
        have_dmedia=yes
        ])
        AC_MSG_RESULT($have_dmedia)
        # Set up files for the audio library
        if test x$have_dmedia = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_DMEDIA)
            SOURCES="$SOURCES $srcdir/src/audio/dmedia/*.c"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -laudio"
            have_audio=yes
        fi
    fi
}

dnl Check whether we want to use Tru64 UNIX native audio or not
CheckMME()
{
    dnl Make sure we are running on an Tru64 UNIX
    case $ARCH in
        osf)
            ;;
        *)
            return
            ;;
    esac
    if test x$enable_audio = xyes; then
        AC_MSG_CHECKING(for MME audio support)
        MME_CFLAGS="-I/usr/include/mme"
        MME_LIBS="-lmme"
        have_mme=no
        save_CFLAGS="$CFLAGS"
        CFLAGS="$CFLAGS $MME_CFLAGS"
        AC_TRY_COMPILE([
          #include <mme_api.h>
        ],[
          HWAVEOUT sound;
        ],[
        have_mme=yes
        ])
        CFLAGS="$save_CFLAGS"
        AC_MSG_RESULT($have_mme)
        # Set up files for the audio library
        if test x$have_mme = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_MMEAUDIO)
            SOURCES="$SOURCES $srcdir/src/audio/mme/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $MME_CFLAGS"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS $MME_LIBS"
            have_audio=yes
        fi
    fi
}

dnl Find the ESD includes and libraries
CheckESD()
{
    AC_ARG_ENABLE(esd,
AC_HELP_STRING([--enable-esd], [support the Enlightened Sound Daemon [[default=yes]]]),
                  , enable_esd=yes)
    if test x$enable_audio = xyes -a x$enable_esd = xyes; then
        AM_PATH_ESD(0.2.8, have_esd=yes, have_esd=no)
        if test x$have_esd = xyes; then
            AC_ARG_ENABLE(esd-shared,
AC_HELP_STRING([--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 | sed 's/.*\/\(.*\)/\1/; q'`
            echo "-- $esd_lib_spec -> $esd_lib"

            AC_DEFINE(SDL_AUDIO_DRIVER_ESD)
            SOURCES="$SOURCES $srcdir/src/audio/esd/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $ESD_CFLAGS"
            if test x$have_loadso != xyes && \
               test x$enable_esd_shared = xyes; then
                AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic ESD loading])
            fi
            if test x$have_loadso = xyes && \
               test x$enable_esd_shared = xyes && test x$esd_lib != x; then
                AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_ESD_DYNAMIC, "$esd_lib")
            else
                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $ESD_LIBS"
            fi
            have_audio=yes
        fi
    fi
}

CheckARTSC()
{
    AC_ARG_ENABLE(arts,
AC_HELP_STRING([--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(ARTSCONFIG, artsc-config)
        if test x$ARTSCONFIG = x -o x$ARTSCONFIG = x'"$ARTSCONFIG"'; then
            : # arts isn't installed
        else
            ARTS_CFLAGS=`$ARTSCONFIG --cflags`
            ARTS_LIBS=`$ARTSCONFIG --libs`
            ARTS_PREFIX=`$ARTSCONFIG --arts-prefix`
            AC_MSG_CHECKING(for aRts development environment)
            audio_arts=no
            save_CFLAGS="$CFLAGS"
            CFLAGS="$CFLAGS $ARTS_CFLAGS"
            AC_TRY_COMPILE([
             #include <artsc.h>
            ],[
             arts_stream_t stream;
            ],[
            audio_arts=yes
            ])
            CFLAGS="$save_CFLAGS"
            AC_MSG_RESULT($audio_arts)
            if test x$audio_arts = xyes; then
                AC_ARG_ENABLE(arts-shared,
AC_HELP_STRING([--enable-arts-shared], [dynamically load aRts audio support [[default=yes]]]),
                              , enable_arts_shared=yes)
                arts_lib_spec="$ARTS_PREFIX/lib/libartsc.so.*"
                arts_lib=`ls -- $arts_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
                echo "-- $arts_lib_spec -> $arts_lib"

                AC_DEFINE(SDL_AUDIO_DRIVER_ARTS)
                SOURCES="$SOURCES $srcdir/src/audio/arts/*.c"
                EXTRA_CFLAGS="$EXTRA_CFLAGS $ARTS_CFLAGS"
                if test x$have_loadso != xyes && \
                   test x$enable_arts_shared = xyes; then
                    AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic ARTS loading])
                fi
                if test x$have_loadso = xyes && \
                   test x$enable_arts_shared = xyes && test x$arts_lib != x; then
                    AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_ARTS_DYNAMIC, "$arts_lib")
                else
                    EXTRA_LDFLAGS="$EXTRA_LDFLAGS $ARTS_LIBS"
                fi
                have_audio=yes
            fi
        fi
    fi
}

dnl See if the NAS audio interface is supported
CheckNAS()
{
    AC_ARG_ENABLE(nas,
AC_HELP_STRING([--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_CHECK_HEADER(audio/audiolib.h, have_nas_hdr=yes)
        AC_CHECK_LIB(audio, AuOpenServer, have_nas_lib=yes)

        AC_MSG_CHECKING(for NAS audio support)
        have_nas=no

        if test x$have_nas_hdr = xyes -a x$have_nas_lib = xyes; then
            have_nas=yes
            NAS_LIBS="-laudio"

        elif test -r /usr/X11R6/include/audio/audiolib.h; then
            have_nas=yes
            NAS_CFLAGS="-I/usr/X11R6/include/"
            NAS_LIBS="-L/usr/X11R6/lib -laudio -lXt"

        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
            NAS_LIBS="-lnas -lXt"
        fi

        AC_MSG_RESULT($have_nas)

        if test x$have_nas = xyes; then
            AC_ARG_ENABLE(nas-shared,
AC_HELP_STRING([--enable-nas-shared], [dynamically load NAS audio support [[default=yes]]]),
                          , enable_nas_shared=yes)
            if test "x`echo $NAS_LIBS | grep -- -L`" = "x"; then
                if test "x`ls /lib/libaudio.so.* 2> /dev/null`" != "x"; then
                    NAS_LIBS="-L/lib $NAS_LIBS"
                elif test "x`ls /usr/lib/libaudio.so.* 2> /dev/null`" != "x"; then
                    NAS_LIBS="-L/usr/lib $NAS_LIBS"
                elif test "x`ls /usr/local/lib/libaudio.so.* 2> /dev/null`" != "x"; then
                    NAS_LIBS="-L/usr/local/lib $NAS_LIBS"
                fi
            fi
            nas_lib_spec=`echo $NAS_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libaudio.so.*/'`
            nas_lib=`ls -- $nas_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
            echo "-- $nas_lib_spec -> $nas_lib"

            if test x$have_loadso != xyes && \
               test x$enable_nas_shared = xyes; then
                AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic NAS loading])
            fi
            if test x$have_loadso = xyes && \
               test x$enable_nas_shared = xyes && test x$nas_lib != x; then
                AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_NAS_DYNAMIC, "$nas_lib")
            else
                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $NAS_LIBS"
            fi

            AC_DEFINE(SDL_AUDIO_DRIVER_NAS)
            SOURCES="$SOURCES $srcdir/src/audio/nas/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $NAS_CFLAGS"
            have_audio=yes
        fi
    fi
}

dnl rcg07142001 See if the user wants the disk writer audio driver...
CheckDiskAudio()
{
    AC_ARG_ENABLE(diskaudio,
AC_HELP_STRING([--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
        AC_DEFINE(SDL_AUDIO_DRIVER_DISK)
        SOURCES="$SOURCES $srcdir/src/audio/disk/*.c"
    fi
}

dnl rcg03142006 See if the user wants the dummy audio driver...
CheckDummyAudio()
{
    AC_ARG_ENABLE(dummyaudio,
AC_HELP_STRING([--enable-dummyaudio], [support the dummy audio driver [[default=yes]]]),
                  , enable_dummyaudio=yes)
    if test x$enable_audio = xyes -a x$enable_dummyaudio = xyes; then
        AC_DEFINE(SDL_AUDIO_DRIVER_DUMMY)
        SOURCES="$SOURCES $srcdir/src/audio/dummy/*.c"
    fi
}

dnl Set up the Atari Audio driver
CheckAtariAudio()
{
    AC_ARG_ENABLE(mintaudio,
AC_HELP_STRING([--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$have_mint_falcon_hdr = xyes; then
            mintaudio=yes
            AC_DEFINE(SDL_AUDIO_DRIVER_MINT)
            SOURCES="$SOURCES $srcdir/src/audio/mint/*.c"
            SOURCES="$SOURCES $srcdir/src/audio/mint/*.S"
            have_audio=yes
        fi
    fi
}

dnl See if GCC's -fvisibility=hidden is supported (gcc4 and later, usually).
dnl  Details of this flag are here: http://gcc.gnu.org/wiki/Visibility
CheckVisibilityHidden()
{
    AC_MSG_CHECKING(for GCC -fvisibility=hidden option)
    have_gcc_fvisibility=no

    visibility_CFLAGS="-fvisibility=hidden"
    save_CFLAGS="$CFLAGS"
    CFLAGS="$save_CFLAGS $visibility_CFLAGS"
    AC_TRY_COMPILE([
    #if !defined(__GNUC__) || __GNUC__ < 4
    #error SDL only uses visibility attributes in GCC 4 or newer
    #endif
    ],[
    ],[
    have_gcc_fvisibility=yes
    ])
    AC_MSG_RESULT($have_gcc_fvisibility)
    CFLAGS="$save_CFLAGS"

    if test x$have_gcc_fvisibility = xyes; then
        EXTRA_CFLAGS="$EXTRA_CFLAGS $visibility_CFLAGS"
    fi
}


dnl Do the iPod thing
CheckIPod()
{
    AC_ARG_ENABLE(ipod,
AC_HELP_STRING([--enable-ipod], [configure SDL to work with iPodLinux [default=yes on arm-elf]]),
        , enable_ipod=yes)

    if test x$enable_ipod = xyes; then
        EXTRA_CFLAGS="$EXTRA_CFLAGS -DIPOD"
        AC_DEFINE(SDL_VIDEO_DRIVER_IPOD)
        SOURCES="$SOURCES $srcdir/src/video/ipod/*.c"
    fi
}

dnl Find the nanox include and library directories
CheckNANOX()
{
    AC_ARG_ENABLE(video-nanox,
        AC_HELP_STRING([--enable-video-nanox], [use nanox video driver [[default=no]]]),
        , enable_video_nanox=no)

    if test x$enable_video = xyes -a x$enable_video_nanox = xyes; then
        AC_ARG_ENABLE(nanox-debug,  
            AC_HELP_STRING([--enable-nanox-debug], [print debug messages [[default=no]]]),
            , enable_nanox_debug=no)
        if test x$enable_nanox_debug = xyes; then
            EXTRA_CFLAGS="$EXTRA_CFLAGS -DENABLE_NANOX_DEBUG"
        fi

        AC_ARG_ENABLE(nanox-share-memory,  
            AC_HELP_STRING([--enable-nanox-share-memory], [use share memory [[default=no]]]),
            , enable_nanox_share_memory=no)
        if test x$enable_nanox_share_memory = xyes; then
            EXTRA_CFLAGS="$EXTRA_CFLAGS -DNANOX_SHARE_MEMORY"
        fi

        AC_ARG_ENABLE(nanox_direct_fb, 
            AC_HELP_STRING([--enable-nanox-direct-fb], [use direct framebuffer access [[default=no]]]),
            , enable_nanox_direct_fb=no)
        if test x$enable_nanox_direct_fb = xyes; then
            EXTRA_CFLAGS="$EXTRA_CFLAGS -DENABLE_NANOX_DIRECT_FB"
        fi

        AC_DEFINE(SDL_VIDEO_DRIVER_NANOX)
        SOURCES="$SOURCES $srcdir/src/video/nanox/*.c"
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lnano-X"
        have_video=yes
    fi
}

dnl Find the X11 include and library directories
CheckX11()
{
    AC_ARG_ENABLE(video-x11,
AC_HELP_STRING([--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
        case "$host" in
            *-*-darwin*)
                # This isn't necessary for X11, but fixes GLX detection
                if test "x$x_includes" = xNONE && test "x$x_libraries" = xNONE; then
                    x_includes="/usr/X11R6/include"
                    x_libraries="/usr/X11R6/lib"
                fi
                ;;
        esac
        AC_PATH_X
        AC_PATH_XTRA
        if test x$have_x = xyes; then
            # Only allow dynamically loaded X11 if the X11 function pointers
            # will not end up in the global namespace, which causes problems
            # with other libraries calling X11 functions.
            x11_symbols_private=$have_gcc_fvisibility

            AC_ARG_ENABLE(x11-shared,
AC_HELP_STRING([--enable-x11-shared], [dynamically load X11 support [[default=maybe]]]),
                          , enable_x11_shared=maybe)

            case "$host" in
                *-*-darwin*) # Latest Mac OS X actually ships with Xrandr/Xrender libs...
                    x11_symbols_private=yes
                    x11_lib='/usr/X11R6/lib/libX11.6.dylib'
                    x11ext_lib='/usr/X11R6/lib/libXext.6.dylib'
                    xrender_lib='/usr/X11R6/lib/libXrender.1.dylib'
                    xrandr_lib='/usr/X11R6/lib/libXrandr.2.dylib'
                    ;;
                *-*-osf*)
                    x11_lib='libX11.so'
                    x11ext_lib='libXext.so'
                    ;;
                *-*-irix*) # IRIX 6.5 requires that we use /usr/lib32
                    x11_lib='libX11.so'
                    x11ext_lib='libXext.so'
                    ;;
                *)
                    x11_lib_spec=[`echo $X_LIBS | sed 's/.*-L\([^ ]*\).*/\1/'`]
                    for path in $x11_lib_path /usr/lib /usr/X11/lib /usr/X11R6/lib; do
                        if test "x$x11_lib" = "x"; then
                            x11_lib=[`ls -- $path/libX11.so.[0-9] 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            if test "x$x11_lib" = "x"; then
                                x11_lib=[`ls -- $path/libX11.so.[0-9]* 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            fi
                        fi
                        if test "x$x11ext_lib" = "x"; then
                            x11ext_lib=[`ls -- $path/libXext.so.[0-9] 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            if test "x$x11ext_lib" = "x"; then
                                x11ext_lib=[`ls -- $path/libXext.so.[0-9]* 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            fi
                        fi
                        if test "x$xrender_lib" = "x"; then
                            xrender_lib=[`ls -- $path/libXrender.so.[0-9] 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            if test "x$xrender_lib" = "x"; then
                                xrender_lib=[`ls -- $path/libXrender.so.[0-9]* 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            fi
                        fi
                        if test "x$xrandr_lib" = "x"; then
                            xrandr_lib=[`ls -- $path/libXrandr.so.[0-9] 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            if test "x$xrandr_lib" = "x"; then
                                xrandr_lib=[`ls -- $path/libXrandr.so.[0-9]* 2>/dev/null | sort -r | sed 's/.*\/\(.*\)/\1/; q'`]
                            fi
                        fi
                    done
                    ;;
            esac

            X_CFLAGS="$X_CFLAGS -DXTHREADS"
            if test x$ac_cv_func_shmat != xyes; then
                X_CFLAGS="$X_CFLAGS -DNO_SHARED_MEMORY"
            fi
            CFLAGS="$CFLAGS $X_CFLAGS"
            LDFLAGS="$LDFLAGS $X_LIBS"

            AC_DEFINE(SDL_VIDEO_DRIVER_X11)
            SOURCES="$SOURCES $srcdir/src/video/x11/*.c"
            SOURCES="$SOURCES $srcdir/src/video/Xext/XmuStdCmap/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $X_CFLAGS"

            if test x$enable_x11_shared = xmaybe; then
                enable_x11_shared=$x11_symbols_private
            fi
            if test x$have_loadso != xyes && \
               test x$enable_x11_shared = xyes; then
                AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic X11 loading])
                enable_x11_shared=no
            fi
            if test x$x11_symbols_private != xyes && \
               test x$enable_x11_shared = xyes; then
                AC_MSG_WARN([You must have gcc4 (-fvisibility=hidden) for dynamic X11 loading])
                enable_x11_shared=no
            fi

            if test x$have_loadso = xyes && \
               test x$enable_x11_shared = xyes && test x$x11_lib != x && test x$x11ext_lib != x; then
                echo "-- dynamic libX11 -> $x11_lib"
                echo "-- dynamic libX11ext -> $x11ext_lib"
                AC_DEFINE_UNQUOTED(SDL_VIDEO_DRIVER_X11_DYNAMIC, "$x11_lib")
                AC_DEFINE_UNQUOTED(SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT, "$x11ext_lib")
            else
                enable_x11_shared=no
                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $X_LIBS -lX11 -lXext"
            fi
            have_video=yes

            AC_ARG_ENABLE(video-x11-vm,
AC_HELP_STRING([--enable-video-x11-vm], [use X11 VM extension for fullscreen [[default=yes]]]),
                          , enable_video_x11_vm=yes)
            if test x$enable_video_x11_vm = xyes; then
                AC_DEFINE(SDL_VIDEO_DRIVER_X11_VIDMODE)
                SOURCES="$SOURCES $srcdir/src/video/Xext/Xxf86vm/*.c"
            fi
            AC_ARG_ENABLE(video-x11-xv,
AC_HELP_STRING([--enable-video-x11-xv], [use X11 XvImage extension for video [[default=yes]]]),
                          , enable_video_x11_xv=yes)
            if test x$enable_video_x11_xv = xyes; then
                AC_DEFINE(SDL_VIDEO_DRIVER_X11_XV)
                SOURCES="$SOURCES $srcdir/src/video/Xext/Xv/*.c"
            fi
            AC_ARG_ENABLE(video-x11-xinerama,
AC_HELP_STRING([--enable-video-x11-xinerama], [enable X11 Xinerama support [[default=yes]]]),
                            , enable_video_x11_xinerama=yes)
            if test x$enable_video_x11_xinerama = xyes; then
                AC_DEFINE(SDL_VIDEO_DRIVER_X11_XINERAMA)
                SOURCES="$SOURCES $srcdir/src/video/Xext/Xinerama/*.c"
            fi
            AC_ARG_ENABLE(video-x11-xme,
AC_HELP_STRING([--enable-video-x11-xme], [enable Xi Graphics XME for fullscreen [[default=yes]]]),
                            , enable_video_x11_xme=yes)
            if test x$enable_video_x11_xme = xyes; then
                AC_DEFINE(SDL_VIDEO_DRIVER_X11_XME)
                SOURCES="$SOURCES $srcdir/src/video/Xext/XME/*.c"
            fi
            AC_ARG_ENABLE(video-x11-xrandr,
AC_HELP_STRING([--enable-video-x11-xrandr], [enable X11 Xrandr extension for fullscreen [[default=yes]]]),
                            , enable_video_x11_xrandr=yes)
            if test x$enable_video_x11_xrandr = xyes; then
                definitely_enable_video_x11_xrandr=no
                AC_CHECK_HEADER(X11/extensions/Xrandr.h,
                                have_xrandr_h_hdr=yes,
                                have_xrandr_h_hdr=no,
                                [#include <X11/Xlib.h>
                                ])
                if test x$have_xrandr_h_hdr = xyes; then
                    if test x$enable_x11_shared = xyes && test x$xrandr_lib != x ; then
                        echo "-- dynamic libXrender -> $xrender_lib"
                        echo "-- dynamic libXrandr -> $xrandr_lib"
                        AC_DEFINE_UNQUOTED(SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER, "$xrender_lib")
                        AC_DEFINE_UNQUOTED(SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR, "$xrandr_lib")
                        definitely_enable_video_x11_xrandr=yes
                    else
                        AC_CHECK_LIB(Xrender, XRenderQueryExtension, have_xrender_lib=yes)
                        AC_CHECK_LIB(Xrandr, XRRQueryExtension, have_xrandr_lib=yes)
                        if test x$have_xrender_lib = xyes && test x$have_xrandr_lib = xyes ; then
                            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lXrandr -lXrender"
                            definitely_enable_video_x11_xrandr=yes
                        fi
                    fi
                fi
            fi
            if test x$definitely_enable_video_x11_xrandr = xyes; then
                AC_DEFINE(SDL_VIDEO_DRIVER_X11_XRANDR)
            fi
            AC_ARG_ENABLE(video-x11-dpms,
AC_HELP_STRING([--enable-video-x11-dpms], [enable X11 DPMS extension [[default=yes]]]),
                            , enable_video_x11_dpms=yes)
            if test x$enable_video_x11_dpms = xyes; then
                AC_CHECK_HEADER(X11/extensions/dpms.h,
                                have_dpms_h_hdr=yes,
                                have_dpms_h_hdr=no,
                                [#include <X11/Xlib.h>
                                ])
                if test x$have_dpms_h_hdr = xyes; then
                    AC_DEFINE(SDL_VIDEO_DRIVER_X11_DPMS)
                fi
            fi
        fi
    fi
}

dnl Check for QNX photon video driver
CheckPHOTON()
{
    AC_ARG_ENABLE(video-photon,
AC_HELP_STRING([--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
            AC_DEFINE(SDL_VIDEO_DRIVER_PHOTON)
            SOURCES="$SOURCES $srcdir/src/video/photon/*.c"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lph"
            have_video=yes

            CheckOpenGLQNX
        fi
    fi
}

dnl Set up the BWindow video driver if enabled
CheckBWINDOW()
{
    if test x$enable_video = xyes; then
        AC_DEFINE(SDL_VIDEO_DRIVER_BWINDOW)
        SOURCES="$SOURCES $srcdir/src/video/bwindow/*.cc"
        have_video=yes
    fi
}

dnl Set up the Cocoa video driver for Mac OS X (but not Darwin)
CheckCOCOA()
{
    AC_ARG_ENABLE(video-cocoa,
AC_HELP_STRING([--enable-video-cocoa], [use Cocoa video driver [[default=yes]]]),
                  , enable_video_cocoa=yes)
    if test x$enable_video = xyes -a x$enable_video_cocoa = xyes; then
        save_CFLAGS="$CFLAGS"
        dnl work around that we don't have Objective-C support in autoconf
        CFLAGS="$CFLAGS -x objective-c"
        AC_MSG_CHECKING(for Cocoa framework)
        have_cocoa=no
        AC_TRY_COMPILE([
          #import <Cocoa/Cocoa.h>
        ],[
        ],[
        have_cocoa=yes
        ])
        AC_MSG_RESULT($have_cocoa)
        CFLAGS="$save_CFLAGS"
        if test x$have_cocoa = xyes; then
            AC_DEFINE(SDL_VIDEO_DRIVER_COCOA)
            SOURCES="$SOURCES $srcdir/src/video/cocoa/*.m"
            have_video=yes
        fi
    fi
}

dnl Find the framebuffer console includes
CheckFBCON()
{
    AC_ARG_ENABLE(video-fbcon,
AC_HELP_STRING([--enable-video-fbcon], [use framebuffer console video driver [[default=no]]]),
                  , enable_video_fbcon=no)
    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
            AC_CHECK_FUNCS(getpagesize)
            AC_DEFINE(SDL_VIDEO_DRIVER_FBCON)
            SOURCES="$SOURCES $srcdir/src/video/fbcon/*.c"
            have_video=yes
        fi
    fi
}

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

        DIRECTFB_REQUIRED_VERSION=0.9.15

        AC_PATH_PROG(DIRECTFBCONFIG, directfb-config, no)
        if test x$DIRECTFBCONFIG = xno; then
            AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
            AC_MSG_CHECKING(for DirectFB $DIRECTFB_REQUIRED_VERSION support)
            if test x$PKG_CONFIG != xno; then
                if $PKG_CONFIG --atleast-pkgconfig-version 0.7 && $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)
        else
            AC_MSG_CHECKING(for DirectFB $DIRECTFB_REQUIRED_VERSION support)
            set -- `echo $DIRECTFB_REQUIRED_VERSION | sed 's/\./ /g'`
            NEED_VERSION=`expr $1 \* 10000 + $2 \* 100 + $3`
            set -- `directfb-config --version | sed 's/\./ /g'`
            HAVE_VERSION=`expr $1 \* 10000 + $2 \* 100 + $3`
            if test $HAVE_VERSION -ge $NEED_VERSION; then
                DIRECTFB_CFLAGS=`$DIRECTFBCONFIG --cflags`
                DIRECTFB_LIBS=`$DIRECTFBCONFIG --libs`
                video_directfb=yes
            fi
            AC_MSG_RESULT($video_directfb)
        fi

        if test x$video_directfb = xyes; then
            AC_DEFINE(SDL_VIDEO_DRIVER_DIRECTFB)
            SOURCES="$SOURCES $srcdir/src/video/directfb/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $DIRECTFB_CFLAGS"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS $DIRECTFB_LIBS"
            have_video=yes
        fi
    fi
}

dnl See if we're running on PlayStation 2 hardware
CheckPS2GS()
{
    AC_ARG_ENABLE(video-ps2gs,
AC_HELP_STRING([--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
            AC_DEFINE(SDL_VIDEO_DRIVER_PS2GS)
            SOURCES="$SOURCES $srcdir/src/video/ps2gs/*.c"
            have_video=yes
        fi
    fi
}

dnl Find the SVGAlib includes and libraries
CheckSVGA()
{
    AC_ARG_ENABLE(video-svga,
AC_HELP_STRING([--enable-video-svga], [use SVGAlib video driver [[default=yes]]]),
                  , enable_video_svga=yes)
    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
            AC_DEFINE(SDL_VIDEO_DRIVER_SVGALIB)
            SOURCES="$SOURCES $srcdir/src/video/svga/*.c"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lvga"
            have_video=yes
        fi
    fi
}

dnl Find the VGL includes and libraries
CheckVGL()
{
    AC_ARG_ENABLE(video-vgl,
AC_HELP_STRING([--enable-video-vgl], [use VGL video driver [[default=yes]]]),
                  , enable_video_vgl=yes)
    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;
         bitmap.Type = VIDBUF32;
         bitmap.PixelBytes = 4;
         exit(bitmap.Bitmap);
        ],[
        video_vgl=yes
        ])
        AC_MSG_RESULT($video_vgl)
        if test x$video_vgl = xyes; then
            AC_DEFINE(SDL_VIDEO_DRIVER_VGL)
            SOURCES="$SOURCES $srcdir/src/video/vgl/*.c"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lvgl"
            have_video=yes
        fi
    fi
}

dnl Set up the wscons video driver if enabled
CheckWscons()
{
    AC_ARG_ENABLE(video-wscons,
AC_HELP_STRING([--enable-video-wscons], [use wscons video driver [[default=yes]]]),
                  , enable_video_wscons=yes)
    if test x$enable_video = xyes -a x$enable_video_wscons = xyes; then
        AC_MSG_CHECKING(for wscons support)
        video_wscons=no
        AC_TRY_COMPILE([
         #include <sys/time.h>
         #include <dev/wscons/wsconsio.h>
         #include <dev/wscons/wsdisplay_usl_io.h>
        ],[
         int wsmode = WSDISPLAYIO_MODE_DUMBFB;
        ],[
        video_wscons=yes
        ])
        AC_MSG_RESULT($video_wscons)
        if test x$video_wscons = xyes; then
            AC_DEFINE(SDL_VIDEO_DRIVER_WSCONS)
            SOURCES="$SOURCES $srcdir/src/video/wscons/*.c"
            have_video=yes
        fi
    fi
}

dnl Set up the Atari Bios keyboard driver
CheckAtariBiosEvent()
{
    SOURCES="$SOURCES $srcdir/src/video/ataricommon/*.c"
    SOURCES="$SOURCES $srcdir/src/video/ataricommon/*.S"
}

dnl Set up the Atari Xbios driver
CheckAtariXbiosVideo()
{
    AC_ARG_ENABLE(video-xbios,
AC_HELP_STRING([--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
        AC_DEFINE(SDL_VIDEO_DRIVER_XBIOS)
        SOURCES="$SOURCES $srcdir/src/video/xbios/*.c"
        have_video=yes
    fi
}

dnl Set up the Atari Gem driver
CheckAtariGemVideo()
{
    AC_ARG_ENABLE(video-gem,
AC_HELP_STRING([--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
            AC_DEFINE(SDL_VIDEO_DRIVER_GEM)
            SOURCES="$SOURCES $srcdir/src/video/gem/*.c"
            SDL_LIBS="$SDL_LIBS -lgem"
            have_video=yes
        fi
    fi
}

dnl rcg04172001 Set up the Null video driver.
CheckDummyVideo()
{
    AC_ARG_ENABLE(video-dummy,
AC_HELP_STRING([--enable-video-dummy], [use dummy video driver [[default=yes]]]),
                  , enable_video_dummy=yes)
    if test x$enable_video_dummy = xyes; then
        AC_DEFINE(SDL_VIDEO_DRIVER_DUMMY)
        SOURCES="$SOURCES $srcdir/src/video/dummy/*.c"
        have_video=yes
    fi
}

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

dnl Find OpenGL
CheckOpenGLX11()
{
    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 <GL/glu.h>
        ],[
        ],[
        video_opengl=yes
        ])
        AC_MSG_RESULT($video_opengl)
        if test x$video_opengl = xyes; then
            AC_DEFINE(SDL_VIDEO_OPENGL)
            AC_DEFINE(SDL_VIDEO_OPENGL_GLX)
            AC_DEFINE(SDL_VIDEO_RENDER_OGL)
        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
            AC_DEFINE(SDL_VIDEO_OPENGL)
            AC_DEFINE(SDL_VIDEO_RENDER_OGL)
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lGL"
        fi
    fi
}

dnl Check for Win32 OpenGL
CheckWIN32GL()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        AC_DEFINE(SDL_VIDEO_OPENGL)
        AC_DEFINE(SDL_VIDEO_OPENGL_WGL)
        AC_DEFINE(SDL_VIDEO_RENDER_OGL)
    fi
}

dnl Check for BeOS OpenGL
CheckBeGL()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        AC_DEFINE(SDL_VIDEO_OPENGL)
        AC_DEFINE(SDL_VIDEO_OPENGL_BGL)
        AC_DEFINE(SDL_VIDEO_RENDER_OGL)
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lGL"
    fi
}

dnl Check for MacOS OpenGL
CheckMacGL()
{
    if test x$enable_video = xyes -a x$enable_video_opengl = xyes; then
        AC_DEFINE(SDL_VIDEO_OPENGL)
        AC_DEFINE(SDL_VIDEO_OPENGL_CGL)
        AC_DEFINE(SDL_VIDEO_RENDER_OGL)
        case "$host" in
            *-*-darwin*)
                if test x$enable_video_cocoa = xyes; then
                    EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,OpenGL"
                fi
        esac
    fi
}

dnl Check for Mesa offscreen rendering
CheckAtariOSMesa()
{
    if test "x$enable_video" = "xyes" -a "x$enable_video_opengl" = "xyes"; then
        AC_CHECK_HEADER(GL/osmesa.h, have_osmesa_hdr=yes)
        AC_CHECK_LIB(OSMesa, OSMesaCreateContext, have_osmesa_lib=yes, have_osmesa_lib=no, -lm)

        # Static linking to -lOSMesa
        AC_PATH_PROG(OSMESA_CONFIG, osmesa-config, no)
        if test "x$OSMESA_CONFIG" = "xno" -o "x$enable_atari_ldg" = "xno"; then
            # -lOSMesa is really the static library
            if test "x$have_osmesa_hdr" = "xyes" -a "x$have_osmesa_lib" = "xyes"; then
                OSMESA_LIBS="-lOSMesa"
            fi
        else
            # -lOSMesa is a loader for OSMesa.ldg
            OSMESA_CFLAGS=`$OSMESA_CONFIG --cflags`
            OSMESA_LIBS=`$OSMESA_CONFIG --libs`
        fi
        AC_DEFINE(SDL_VIDEO_OPENGL)
        AC_DEFINE(SDL_VIDEO_OPENGL_OSMESA)
        AC_DEFINE(SDL_VIDEO_RENDER_OGL)
        SDL_CFLAGS="$SDL_CFLAGS $OSMESA_CFLAGS"
        SDL_LIBS="$SDL_LIBS $OSMESA_LIBS"

        AC_ARG_ENABLE(osmesa-shared,
AC_HELP_STRING([--enable-osmesa-shared], [dynamically load OSMesa OpenGL support [[default=yes]]]),
                              , enable_osmesa_shared=yes)
        if test "x$enable_osmesa_shared" = "xyes" -a "x$enable_atari_ldg" = "xyes"; then
            # Dynamic linking
            if test "x$have_osmesa_hdr" = "xyes"; then
                AC_DEFINE(SDL_VIDEO_OPENGL_OSMESA_DYNAMIC)
            fi
        fi
    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,
AC_HELP_STRING([--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
            AC_DEFINE(SDL_INPUT_LINUXEV)
        fi
    fi
}

dnl See if we can use the Touchscreen input library
CheckTslib()
{
    AC_ARG_ENABLE(input-tslib,
AC_HELP_STRING([--enable-input-tslib], [use the Touchscreen library for input [[default=yes]]]),
                  , enable_input_tslib=yes)
    if test x$enable_input_tslib = xyes; then
        AC_MSG_CHECKING(for Touchscreen library support)
        enable_input_tslib=no
        AC_TRY_COMPILE([
          #include "tslib.h"
        ],[
        ],[
        enable_input_tslib=yes
        ])
        AC_MSG_RESULT($enable_input_tslib)
        if test x$enable_input_tslib = xyes; then
            AC_DEFINE(SDL_INPUT_TSLIB)
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lts"
        fi
    fi
}

dnl See if we can use GNU pth library for threads
CheckPTH()
{
    dnl Check for pth support
    AC_ARG_ENABLE(pth,
AC_HELP_STRING([--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 "$PTH_CONFIG" = "no"; then
            use_pth=no
        else
            use_pth=yes
        fi
        AC_MSG_CHECKING(pth)
        AC_MSG_RESULT($use_pth)
        if test "x$use_pth" = xyes; then
            AC_DEFINE(SDL_THREAD_PTH)
            SOURCES="$SOURCES $srcdir/src/thread/pth/*.c"
            SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_syssem.c"
            SDL_CFLAGS="$SDL_CFLAGS `$PTH_CONFIG --cflags`"
            SDL_LIBS="$SDL_LIBS `$PTH_CONFIG --libs --all`"
            have_threads=yes
        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,
AC_HELP_STRING([--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,
AC_HELP_STRING([--enable-pthread-sem], [use pthread semaphores [[default=yes]]]),
                  , enable_pthread_sem=yes)
    case "$host" in
        *-*-linux*|*-*-uclinux*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-lpthread"
            ;;
        *-*-bsdi*)
            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            pthread_lib=""
            ;;
        *-*-darwin*)
            pthread_cflags="-D_THREAD_SAFE"
# causes Carbon.p complaints?
#            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            ;;
        *-*-freebsd*|*-*-dragonfly*)
            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            pthread_lib="-pthread"
            ;;
        *-*-netbsd*)
            pthread_cflags="-D_REENTRANT -D_THREAD_SAFE"
            pthread_lib="-lpthread"
            ;;
        *-*-openbsd*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-pthread"
            ;;
        *-*-solaris*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-lpthread -lposix4"
            ;;
        *-*-sysv5*)
            pthread_cflags="-D_REENTRANT -Kthread"
            pthread_lib=""
            ;;
        *-*-irix*)
            pthread_cflags="-D_SGI_MP_SOURCE"
            pthread_lib="-lpthread"
            ;;
        *-*-aix*)
            pthread_cflags="-D_REENTRANT -mthreads"
            pthread_lib="-lpthread"
            ;;
        *-*-hpux11*)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-L/usr/lib -lpthread"
            ;;
        *-*-qnx*)
            pthread_cflags=""
            pthread_lib=""
            ;;
        *-*-osf*)
            pthread_cflags="-D_REENTRANT"
            if test x$ac_cv_prog_gcc = xyes; then
                pthread_lib="-lpthread -lrt"
            else
                pthread_lib="-lpthread -lexc -lrt"
            fi
            ;;
        *)
            pthread_cflags="-D_REENTRANT"
            pthread_lib="-lpthread"
            ;;
    esac
    if test x$enable_threads = xyes -a x$enable_pthreads = xyes -a x$enable_ipod != xyes; then
        # Save the original compiler flags and libraries
        ac_save_cflags="$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$use_pthreads = xyes; then
            AC_DEFINE(SDL_THREAD_PTHREAD)
            EXTRA_CFLAGS="$EXTRA_CFLAGS $pthread_cflags"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS $pthread_lib"
            SDL_CFLAGS="$SDL_CFLAGS $pthread_cflags"
            SDL_LIBS="$SDL_LIBS $pthread_lib"

            # 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 recursive mutexes are available
            AC_MSG_CHECKING(for recursive mutexes)
            has_recursive_mutexes=no
            if test x$has_recursive_mutexes = xno; then
                AC_TRY_COMPILE([
                  #include <pthread.h>
                ],[
                  pthread_mutexattr_t attr;
                  pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
                ],[
                has_recursive_mutexes=yes
                AC_DEFINE(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX)
                ])
            fi
            if test x$has_recursive_mutexes = xno; then
                AC_TRY_COMPILE([
                  #include <pthread.h>
                ],[
                  pthread_mutexattr_t attr;
                  pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
                ],[
                has_recursive_mutexes=yes
                AC_DEFINE(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP)
                ])
            fi
            AC_MSG_RESULT($has_recursive_mutexes)

            # 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

            # Restore the compiler flags and libraries
            CFLAGS="$ac_save_cflags"; LIBS="$ac_save_libs"

            # Basic thread creation functions
            SOURCES="$SOURCES $srcdir/src/thread/pthread/SDL_systhread.c"

            # Semaphores
            # We can fake these with mutexes and condition variables if necessary
            if test x$have_pthread_sem = xyes; then
                SOURCES="$SOURCES $srcdir/src/thread/pthread/SDL_syssem.c"
            else
                SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_syssem.c"
            fi

            # Mutexes
            # We can fake these with semaphores if necessary
            SOURCES="$SOURCES $srcdir/src/thread/pthread/SDL_sysmutex.c"

            # Condition variables
            # We can fake these with semaphores and mutexes if necessary
            SOURCES="$SOURCES $srcdir/src/thread/pthread/SDL_syscond.c"

            have_threads=yes
        else
            CheckPTH
        fi
    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,
AC_HELP_STRING([--enable-stdio-redirect], [Redirect STDIO to files on Win32 [[default=yes]]]),
                  , enable_stdio_redirect=yes)
    if test x$enable_stdio_redirect != xyes; then
        EXTRA_CFLAGS="$EXTRA_CFLAGS -DNO_STDIO_REDIRECT"
    fi
}

dnl Find the DirectX includes and libraries
CheckDIRECTX()
{
    AC_ARG_ENABLE(directx,
AC_HELP_STRING([--enable-directx], [use DirectX for Win32 audio/video [[default=yes]]]),
                  , enable_directx=yes)
    if test x$enable_directx = xyes; then
        AC_CHECK_HEADER(d3d9.h, have_d3d=yes)
        AC_CHECK_HEADER(dsound.h, have_dsound=yes)
        AC_CHECK_HEADER(dinput.h, use_dinput=yes)
    fi
}

dnl Check for the dlfcn.h interface for dynamically loading objects
CheckDLOPEN()
{
    AC_ARG_ENABLE(sdl-dlopen,
AC_HELP_STRING([--enable-sdl-dlopen], [use dlopen for shared object loading [[default=yes]]]),
                  , enable_sdl_dlopen=yes)
    if test x$enable_sdl_dlopen = xyes; then
        AC_MSG_CHECKING(for dlopen)
        have_dlopen=no
        AC_TRY_COMPILE([
         #include <dlfcn.h>
        ],[
         #if defined(MAC_OS_X_VERSION_MIN_REQUIRED) && MAC_OS_X_VERSION_MIN_REQUIRED <= 1020
         #error Use dlcompat for Mac OS X 10.2 compatibility
         #endif
        ],[
        have_dlopen=yes
        ])
        AC_MSG_RESULT($have_dlopen)

        if test x$have_dlopen = xyes; then
            AC_CHECK_LIB(c, dlopen, EXTRA_LDFLAGS="$EXTRA_LDFLAGS",
               AC_CHECK_LIB(dl, dlopen, EXTRA_LDFLAGS="$EXTRA_LDFLAGS -ldl",
                  AC_CHECK_LIB(ltdl, dlopen, EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lltdl")))
            AC_CHECK_LIB(dl, dlvsym, have_dlvsym=yes)
            if test x$have_dlvsym = xyes; then
                AC_DEFINE(HAVE_DLVSYM)
            fi
            AC_DEFINE(SDL_LOADSO_DLOPEN)
            SOURCES="$SOURCES $srcdir/src/loadso/dlopen/*.c"
            have_loadso=yes
        fi
    fi
}

dnl Set up the Atari LDG (shared object loader)
CheckAtariLdg()
{
    AC_ARG_ENABLE(atari-ldg,
AC_HELP_STRING([--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
            AC_DEFINE(SDL_LOADSO_LDG)
            SOURCES="$SOURCES $srcdir/src/loadso/mint/*.c"
            SDL_LIBS="$SDL_LIBS -lldg -lgem"
            have_loadso=yes
        fi
    fi
}

dnl Check for the usbhid(3) library on *BSD
CheckUSBHID()
{
    if test x$enable_joystick = xyes; then
        AC_CHECK_LIB(usbhid, hid_init, have_libusbhid=yes)
        if test x$have_libusbhid = xyes; then
            AC_CHECK_HEADER(usbhid.h, [USB_CFLAGS="-DHAVE_USBHID_H"])
            AC_CHECK_HEADER(libusbhid.h, [USB_CFLAGS="-DHAVE_LIBUSBHID_H"])
            USB_LIBS="$USB_LIBS -lusbhid"
        else
            AC_CHECK_HEADER(usb.h, [USB_CFLAGS="-DHAVE_USB_H"])
            AC_CHECK_HEADER(libusb.h, [USB_CFLAGS="-DHAVE_LIBUSB_H"])
            AC_CHECK_LIB(usb, hid_init, [USB_LIBS="$USB_LIBS -lusb"])
        fi
            
        save_CFLAGS="$CFLAGS"
        CFLAGS="$CFLAGS $USB_CFLAGS"

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

            AC_MSG_CHECKING(for struct joystick in machine/joystick.h)
            have_machine_joystick=no
            AC_TRY_COMPILE([
              #include <machine/joystick.h>
            ],[
              struct joystick t;
            ],[
            have_machine_joystick=yes
            ])
            if test x$have_machine_joystick = xyes; then
                AC_DEFINE(SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H)
            fi
            AC_MSG_RESULT($have_machine_joystick)

            AC_DEFINE(SDL_JOYSTICK_USBHID)
            SOURCES="$SOURCES $srcdir/src/joystick/bsd/*.c"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $USB_CFLAGS"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS $USB_LIBS"
            have_joystick=yes
        fi
        CFLAGS="$save_CFLAGS"
    fi
}

dnl Check for clock_gettime()
CheckClockGettime()
{
    AC_ARG_ENABLE(clock_gettime,
AC_HELP_STRING([--enable-clock_gettime], [use clock_gettime() instead of gettimeofday() on UNIX [[default=no]]]),
                  , enable_clock_gettime=no)
    if test x$enable_clock_gettime = xyes; then
        AC_CHECK_LIB(rt, clock_gettime, have_clock_gettime=yes)
        if test x$have_clock_gettime = xyes; then
            AC_DEFINE(HAVE_CLOCK_GETTIME)
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lrt"
        fi
    fi
}

dnl Check for a valid linux/version.h
CheckLinuxVersion()
{
    AC_CHECK_HEADER(linux/version.h, have_linux_version_h=yes)
    if test x$have_linux_version_h = xyes; then
        EXTRA_CFLAGS="$EXTRA_CFLAGS -DHAVE_LINUX_VERSION_H"
    fi
}

dnl Check if we want to use RPATH
CheckRPATH()
{
    AC_ARG_ENABLE(rpath,
AC_HELP_STRING([--enable-rpath], [use an rpath when linking SDL [[default=yes]]]),
                  , enable_rpath=yes)
}

dnl Set up the configuration based on the host platform!
case "$host" in
    arm-*-elf*) # FIXME: Can we get more specific for iPodLinux?
        ARCH=linux
        CheckDummyVideo
        CheckIPod
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_UNIX)
            SOURCES="$SOURCES $srcdir/src/timer/unix/*.c"
            have_timers=yes
        fi
        ;;
    *-*-linux*|*-*-uclinux*|*-*-gnu*|*-*-k*bsd*-gnu|*-*-bsdi*|*-*-freebsd*|*-*-dragonfly*|*-*-netbsd*|*-*-openbsd*|*-*-sysv5*|*-*-solaris*|*-*-hpux*|*-*-irix*|*-*-aix*|*-*-osf*)
        case "$host" in
            *-*-linux*)         ARCH=linux ;;
            *-*-uclinux*)       ARCH=linux ;;
            *-*-kfreebsd*-gnu)  ARCH=kfreebsd-gnu ;;
            *-*-knetbsd*-gnu)   ARCH=knetbsd-gnu ;;
            *-*-kopenbsd*-gnu)  ARCH=kopenbsd-gnu ;;
            *-*-gnu*)           ARCH=gnu ;; # must be last of the gnu variants
            *-*-bsdi*)          ARCH=bsdi ;;
            *-*-freebsd*)       ARCH=freebsd ;;
            *-*-dragonfly*)     ARCH=freebsd ;;
            *-*-netbsd*)        ARCH=netbsd ;;
            *-*-openbsd*)       ARCH=openbsd ;;
            *-*-sysv5*)         ARCH=sysv5 ;;
            *-*-solaris*)       ARCH=solaris ;;
            *-*-hpux*)          ARCH=hpux ;;
            *-*-irix*)          ARCH=irix ;;
            *-*-aix*)           ARCH=aix ;;
            *-*-osf*)           ARCH=osf ;;
        esac
        CheckVisibilityHidden
        CheckDummyVideo
        CheckDiskAudio
        CheckDummyAudio
        CheckDLOPEN
        CheckOSS
        CheckDMEDIA
        CheckMME
        CheckALSA
        CheckARTSC
        CheckESD
        CheckNAS
        CheckX11
        CheckNANOX
        CheckFBCON
        CheckDirectFB
        CheckPS2GS
        CheckSVGA
        CheckVGL
        CheckWscons
        CheckOpenGLX11
        CheckInputEvents
        CheckTslib
        CheckUSBHID
        CheckPTHREAD
        CheckClockGettime
        CheckLinuxVersion
        CheckRPATH
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
          case $ARCH in
            sysv5|solaris|hpux)
                AC_DEFINE(SDL_AUDIO_DRIVER_SUNAUDIO)
                SOURCES="$SOURCES $srcdir/src/audio/sun/*.c"
                have_audio=yes
            ;;
            netbsd|openbsd)
                AC_DEFINE(SDL_AUDIO_DRIVER_BSD)
                SOURCES="$SOURCES $srcdir/src/audio/bsd/*.c"
                have_audio=yes
            ;;
            aix)
                AC_DEFINE(SDL_AUDIO_DRIVER_PAUDIO)
                SOURCES="$SOURCES $srcdir/src/audio/paudio/*.c"
                have_audio=yes
            ;;
          esac
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
          case $ARCH in
            linux)
                AC_DEFINE(SDL_JOYSTICK_LINUX)
                SOURCES="$SOURCES $srcdir/src/joystick/linux/*.c"
                have_joystick=yes
            ;;
          esac
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
          case $ARCH in
            linux|solaris)
                AC_DEFINE(SDL_CDROM_LINUX)
                SOURCES="$SOURCES $srcdir/src/cdrom/linux/*.c"
                have_cdrom=yes
            ;;
            *freebsd*)
                AC_DEFINE(SDL_CDROM_FREEBSD)
                SOURCES="$SOURCES $srcdir/src/cdrom/freebsd/*.c"
                have_cdrom=yes
            ;;
            *openbsd*|*netbsd*)
                AC_DEFINE(SDL_CDROM_OPENBSD)
                SOURCES="$SOURCES $srcdir/src/cdrom/openbsd/*.c"
                have_cdrom=yes
            ;;
            bsdi)
                AC_DEFINE(SDL_CDROM_BSDI)
                SOURCES="$SOURCES $srcdir/src/cdrom/bsdi/*.c"
                have_cdrom=yes
            ;;
            aix)
                AC_DEFINE(SDL_CDROM_AIX)
                SOURCES="$SOURCES $srcdir/src/cdrom/aix/*.c"
                have_cdrom=yes
            ;;
            osf)
                AC_DEFINE(SDL_CDROM_OSF)
                SOURCES="$SOURCES $srcdir/src/cdrom/osf/*.c"
                have_cdrom=yes
            ;;
          esac
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes -a x$use_pthreads != xyes -a x$use_pth != xyes -a x$ARCH = xirix; then
            AC_DEFINE(SDL_THREAD_SPROC)
            SOURCES="$SOURCES $srcdir/src/thread/irix/*.c"
            SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_sysmutex.c"
            SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_syscond.c"
            have_threads=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_UNIX)
            SOURCES="$SOURCES $srcdir/src/timer/unix/*.c"
            have_timers=yes
        fi
        ;;
    *-*-qnx*)
        ARCH=qnx
        CheckDummyVideo
        CheckDiskAudio
        CheckDummyAudio
        CheckDLOPEN
        CheckNAS
        CheckPHOTON
        CheckX11
        CheckOpenGLX11
        CheckPTHREAD
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_QNXNTO)
            SOURCES="$SOURCES $srcdir/src/audio/nto/*.c"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lasound"
            have_audio=yes
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            AC_DEFINE(SDL_CDROM_QNX)
            SOURCES="$SOURCES $srcdir/src/cdrom/qnx/*.c"
            have_cdrom=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_UNIX)
            SOURCES="$SOURCES $srcdir/src/timer/unix/*.c"
            have_timers=yes
        fi
        ;;
    *-*-cygwin* | *-*-mingw32*)
        ARCH=win32
        if test "$build" != "$host"; then # cross-compiling
            # Default cross-compile location
            ac_default_prefix=/usr/local/cross-tools/i386-mingw32
        else
            # Look for the location of the tools and install there
            if test "$BUILD_PREFIX" != ""; then
                ac_default_prefix=$BUILD_PREFIX
            fi
        fi
        CheckDummyVideo
        CheckDiskAudio
        CheckDummyAudio
        CheckWIN32
        CheckWIN32GL
        CheckDIRECTX
        # Set up files for the video library
        if test x$enable_video = xyes; then
            AC_DEFINE(SDL_VIDEO_DRIVER_WIN32)
            SOURCES="$SOURCES $srcdir/src/video/win32/*.c"
            have_video=yes
            AC_ARG_ENABLE(render-gdi,
AC_HELP_STRING([--enable-render-gdi], [enable the GDI render driver [[default=yes]]]),
                                , enable_render_gdi=yes)
            if test x$enable_render_gdi = xyes; then
                AC_DEFINE(SDL_VIDEO_RENDER_GDI)
            fi
            AC_ARG_ENABLE(render-d3d,
AC_HELP_STRING([--enable-render-d3d], [enable the Direct3D render driver [[default=yes]]]),
                                , enable_render_d3d=yes)
            if test x$enable_render_d3d = xyes -a x$have_d3d = xyes; then
                AC_DEFINE(SDL_VIDEO_RENDER_D3D)
            fi
        fi
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_WINWAVEOUT)
            SOURCES="$SOURCES $srcdir/src/audio/windib/*.c"
            if test x$have_dsound = xyes; then
                AC_DEFINE(SDL_AUDIO_DRIVER_DSOUND)
                SOURCES="$SOURCES $srcdir/src/audio/windx5/*.c"
            fi
            have_audio=yes
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            if test x$have_dinput = xyes; then
                AC_DEFINE(SDL_JOYSTICK_DINPUT)
                SOURCES="$SOURCES $srcdir/src/joystick/win32/SDL_dxjoystick.c"
            else
                AC_DEFINE(SDL_JOYSTICK_WINMM)
                SOURCES="$SOURCES $srcdir/src/joystick/win32/SDL_mmjoystick.c"
            fi
            have_joystick=yes
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            AC_DEFINE(SDL_CDROM_WIN32)
            SOURCES="$SOURCES $srcdir/src/cdrom/win32/*.c"
            have_cdrom=yes
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            AC_DEFINE(SDL_THREAD_WIN32)
            SOURCES="$SOURCES $srcdir/src/thread/win32/SDL_sysmutex.c"
            SOURCES="$SOURCES $srcdir/src/thread/win32/SDL_syssem.c"
            SOURCES="$SOURCES $srcdir/src/thread/win32/SDL_systhread.c"
            SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_syscond.c"
            have_threads=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_WIN32)
            SOURCES="$SOURCES $srcdir/src/timer/win32/*.c"
            have_timers=yes
        fi
        # Set up files for the shared object loading library
        if test x$enable_loadso = xyes; then
            AC_DEFINE(SDL_LOADSO_WIN32)
            SOURCES="$SOURCES $srcdir/src/loadso/win32/*.c"
            have_loadso=yes
        fi
        # Set up the system libraries we need
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lunicows -luser32 -lgdi32 -lmsimg32 -lwinmm"
        # The Win32 platform requires special setup
        SOURCES="$SOURCES $srcdir/src/main/win32/*.rc"
        SDLMAIN_SOURCES="$srcdir/src/main/win32/*.c"
        SDL_CFLAGS="$SDL_CFLAGS -Dmain=SDL_main"
        SDL_LIBS="-lmingw32 -lSDLmain $SDL_LIBS -mwindows"
        ;;
    *-*-beos*)
        ARCH=beos
        ac_default_prefix=/boot/develop/tools/gnupro
        CheckDummyVideo
        CheckDiskAudio
        CheckDummyAudio
        CheckBWINDOW
        CheckBeGL
        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_BEOSAUDIO)
            SOURCES="$SOURCES $srcdir/src/audio/baudio/*.cc"
            have_audio=yes
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            AC_DEFINE(SDL_JOYSTICK_BEOS)
            SOURCES="$SOURCES $srcdir/src/joystick/beos/*.cc"
            have_joystick=yes
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            AC_DEFINE(SDL_CDROM_BEOS)
            SOURCES="$SOURCES $srcdir/src/cdrom/beos/*.cc"
            have_cdrom=yes
        fi
        # Set up files for the thread library
        if test x$enable_threads = xyes; then
            AC_DEFINE(SDL_THREAD_BEOS)
            SOURCES="$SOURCES $srcdir/src/thread/beos/*.c"
            SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_sysmutex.c"
            SOURCES="$SOURCES $srcdir/src/thread/generic/SDL_syscond.c"
            have_threads=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_BEOS)
            SOURCES="$SOURCES $srcdir/src/timer/beos/*.c"
            have_timers=yes
        fi
        # Set up files for the shared object loading library
        if test x$enable_loadso = xyes; then
            AC_DEFINE(SDL_LOADSO_BEOS)
            SOURCES="$SOURCES $srcdir/src/loadso/beos/*.c"
            have_loadso=yes
        fi
        # The BeOS platform requires special setup.
        SOURCES="$srcdir/src/main/beos/*.cc $SOURCES"
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lroot -lbe -lmedia -lgame -ldevice -ltextencoding"
        ;;
    *-*-darwin* )
        # This could be either full "Mac OS X", or plain "Darwin" which is
        # just the OS X kernel sans upper layers like Carbon and Cocoa.
        # Next line is broken, and a few files below require Mac OS X (full)
        ARCH=macosx

        # Mac OS X builds with both the Carbon and OSX APIs at the moment
        EXTRA_CFLAGS="$EXTRA_CFLAGS -DTARGET_API_MAC_CARBON"
        EXTRA_CFLAGS="$EXTRA_CFLAGS -DTARGET_API_MAC_OSX"

        # HACK: Reset EXTRA_LDFLAGS; the only thing it contains at this point
        # is -lm which is not needed under Mac OS X. But for some reasons it
        # also tends to contain spurious -L switches, which we don't want to
        # use here or in sdl-config. Hence we reset it.
        EXTRA_LDFLAGS=""

        CheckVisibilityHidden
        CheckDummyVideo
        CheckDiskAudio
        CheckDummyAudio
        CheckDLOPEN

        # Set up files for the shared object loading library
        # (this needs to be done before the dynamic X11 check)
        if test x$enable_loadso = xyes -a x$have_dlopen != xyes; then
            AC_DEFINE(SDL_LOADSO_DLCOMPAT)
            SOURCES="$SOURCES $srcdir/src/loadso/macosx/*.c"
            have_loadso=yes
        fi

        CheckCOCOA
        CheckX11
        CheckMacGL
        CheckOpenGLX11
        CheckPTHREAD

        # Good optimization on Mac OS X, yes...
        EXTRA_CFLAGS="$EXTRA_CFLAGS -falign-loops=16"

        # Need this or things might misbuild on a G3.
        EXTRA_CFLAGS="$EXTRA_CFLAGS -force_cpusubtype_ALL"

        # Set up files for the audio library
        if test x$enable_audio = xyes; then
            AC_DEFINE(SDL_AUDIO_DRIVER_COREAUDIO)
            SOURCES="$SOURCES $srcdir/src/audio/macosx/*.c"
            AC_DEFINE(SDL_AUDIO_DRIVER_SNDMGR)
            SOURCES="$SOURCES $srcdir/src/audio/macrom/*.c"
            have_audio=yes
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            AC_DEFINE(SDL_JOYSTICK_IOKIT)
            SOURCES="$SOURCES $srcdir/src/joystick/darwin/*.c"
            have_joystick=yes
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            AC_DEFINE(SDL_CDROM_MACOSX)
            SOURCES="$SOURCES $srcdir/src/cdrom/macosx/*.c"
            have_cdrom=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_UNIX)
            SOURCES="$SOURCES $srcdir/src/timer/unix/*.c"
            have_timers=yes
        fi
        # The Mac OS X platform requires special setup.
        EXTRA_CFLAGS="$EXTRA_CFLAGS -fpascal-strings"
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,Cocoa"
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,Carbon"
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,IOKit"
        # If either the audio or CD driver is used, add the AudioUnit framework
        if test x$enable_audio = xyes -o x$enable_cdrom = xyes; then
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,CoreAudio -framework,AudioToolbox -Wl,-framework,AudioUnit"
        fi
        ;;
    *-*-mint*)
        ARCH=mint
        CheckDummyVideo
        CheckDiskAudio
        CheckDummyAudio
        CheckAtariBiosEvent
        CheckAtariXbiosVideo
        CheckAtariGemVideo
        CheckAtariAudio
        CheckAtariLdg
        CheckAtariOSMesa
        CheckPTH
        # Set up files for the audio library
        if test x$enable_threads = xyes -a x$enable_pth = xyes; then
            if test x$enable_audio = xyes; then
                AC_DEFINE(SDL_AUDIO_DRIVER_SUNAUDIO)
                SOURCES="$SOURCES $srcdir/src/audio/sun/*.c"
                have_audio=yes
            fi
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            AC_DEFINE(SDL_JOYSTICK_MINT)
            SOURCES="$SOURCES $srcdir/src/joystick/mint/*.c"
            have_joystick=yes
        fi
        # Set up files for the cdrom library
        if test x$enable_cdrom = xyes; then
            AC_DEFINE(SDL_CDROM_MINT)
            SOURCES="$SOURCES $srcdir/src/cdrom/mint/*.c"
            have_cdrom=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            if test x$enable_threads = xyes -a x$enable_pth = xyes; then
                AC_DEFINE(SDL_TIMER_UNIX)
                SOURCES="$SOURCES $srcdir/src/timer/unix/*.c"
            else
                AC_DEFINE(SDL_TIMER_MINT)
                SOURCES="$SOURCES $srcdir/src/timer/mint/*.c"
                SOURCES="$SOURCES $srcdir/src/timer/mint/*.S"
            fi
            have_timers=yes
        fi
        ;;
    *-riscos)
        ARCH=riscos
        CheckOSS
        CheckPTHREAD
        # Set up files for the video library
        if test x$enable_video = xyes; then
            AC_DEFINE(SDL_VIDEO_DRIVER_RISCOS)
            SOURCES="$SOURCES $srcdir/src/video/riscos/*.c"
            SOURCES="$SOURCES $srcdir/src/video/riscos/*.S"
            have_video=yes
        fi
        # Set up files for the joystick library
        if test x$enable_joystick = xyes; then
            AC_DEFINE(SDL_JOYSTICK_RISCOS)
            SOURCES="$SOURCES $srcdir/src/joystick/riscos/*.c"
            have_joystick=yes
        fi
        # Set up files for the timer library
        if test x$enable_timers = xyes; then
            AC_DEFINE(SDL_TIMER_RISCOS)
            SOURCES="$SOURCES $srcdir/src/timer/riscos/*.c"
            have_timers=yes
        fi
        # The RISC OS platform requires special setup.
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -ljpeg -ltiff -lpng -lz"
        ;;
    *)
        AC_MSG_ERROR([
*** Unsupported host:  Please add to configure.in
        ])
        ;;
esac

# Verify that we have all the platform specific files we need

if test x$enable_joystick = xyes; then
  if test x$have_joystick != xyes; then
    # Wants joystick subsystem, but doesn't have a platform-specific backend...
    SOURCES="$SOURCES $srcdir/src/joystick/dummy/*.c"
  fi
fi
if test x$have_cdrom != xyes; then
    if test x$enable_cdrom = xyes; then
        AC_DEFINE(SDL_CDROM_DISABLED)
    fi
    SOURCES="$SOURCES $srcdir/src/cdrom/dummy/*.c"
fi
if test x$have_threads != xyes; then
    if test x$enable_threads = xyes; then
        AC_DEFINE(SDL_THREADS_DISABLED)
    fi
    SOURCES="$SOURCES $srcdir/src/thread/generic/*.c"
fi
if test x$have_timers != xyes; then
    if test x$enable_timers = xyes; then
        AC_DEFINE(SDL_TIMERS_DISABLED)
    fi
    SOURCES="$SOURCES $srcdir/src/timer/dummy/*.c"
fi
if test x$have_loadso != xyes; then
    if test x$enable_loadso = xyes; then
        AC_DEFINE(SDL_LOADSO_DISABLED)
    fi
    SOURCES="$SOURCES $srcdir/src/loadso/dummy/*.c"
fi
if test x$SDLMAIN_SOURCES = x; then
    SDLMAIN_SOURCES="$srcdir/src/main/dummy/*.c"
fi

OBJECTS=`echo $SOURCES | sed 's,[[^ ]]*/\([[^ ]]*\)\.asm,$(objects)/\1.lo,g'`
OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.cc,$(objects)/\1.lo,g'`
OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.m,$(objects)/\1.lo,g'`
OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.c,$(objects)/\1.lo,g'`
OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.S,$(objects)/\1.lo,g'`
OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.rc,$(objects)/\1.o,g'`

SDLMAIN_OBJECTS=`echo $SDLMAIN_SOURCES | sed 's,[[^ ]]*/\([[^ ]]*\)\.cc,$(objects)/\1.o,g'`
SDLMAIN_OBJECTS=`echo $SDLMAIN_OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.c,$(objects)/\1.o,g'`

# Set runtime shared library paths as needed

if test "x$enable_rpath" = "xyes"; then
  if test $ARCH = bsdi -o $ARCH = freebsd -o $ARCH = irix -o $ARCH = linux -o $ARCH = netbsd; then
    SDL_RLD_FLAGS="-Wl,-rpath,\${libdir}"
  fi
  if test $ARCH = solaris; then
    SDL_RLD_FLAGS="-R\${libdir}"
  fi
else
  SDL_RLD_FLAGS=""
fi

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

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)
if test x$enable_shared = xyes; then
    ENABLE_SHARED_TRUE=
    ENABLE_SHARED_FALSE="#"
else
    ENABLE_SHARED_TRUE="#"
    ENABLE_SHARED_FALSE=
fi
if test x$enable_static = xyes; then
    ENABLE_STATIC_TRUE=
    ENABLE_STATIC_FALSE="#"
else
    ENABLE_STATIC_TRUE="#"
    ENABLE_STATIC_FALSE=
fi
AC_SUBST(ENABLE_SHARED_TRUE)
AC_SUBST(ENABLE_SHARED_FALSE)
AC_SUBST(ENABLE_STATIC_TRUE)
AC_SUBST(ENABLE_STATIC_FALSE)

dnl Expand the sources and objects needed to build the library
AC_SUBST(ac_aux_dir)
AC_SUBST(INCLUDE)
AC_SUBST(SOURCES)
AC_SUBST(OBJECTS)
AC_SUBST(SDLMAIN_SOURCES)
AC_SUBST(SDLMAIN_OBJECTS)
AC_SUBST(BUILD_CFLAGS)
AC_SUBST(EXTRA_CFLAGS)
AC_SUBST(BUILD_LDFLAGS)
AC_SUBST(EXTRA_LDFLAGS)
AC_SUBST(WINDRES)

AC_OUTPUT([
    Makefile sdl-config SDL.spec SDL.qpg sdl.pc
], [
    : >build-deps
    if test x"$MAKE" = x; then MAKE=make; fi; $MAKE depend
])