macro(CheckDLOPEN)

  check_function_exists(dlopen HAVE_DLOPEN)

  if(NOT HAVE_DLOPEN)

    foreach(_LIBNAME dl tdl)

      check_library_exists("${_LIBNAME}" "dlopen" "" DLOPEN_LIB)

      if(DLOPEN_LIB)

        list(APPEND EXTRA_LIBS ${_LIBNAME})

        set(_DLLIB ${_LIBNAME})

        set(HAVE_DLOPEN TRUE)

        break()

      endif(DLOPEN_LIB)

    endforeach()

  endif()

  if(HAVE_DLOPEN)

    if(_DLLIB)

      set(CMAKE_REQUIRED_LIBRARIES ${_DLLIB})

    endif()

    check_c_source_compiles("

       #include <dlfcn.h>

       int main(int argc, char **argv) {

         void *handle = dlopen(\"\", RTLD_NOW);

         const char *loaderror = (char *) dlerror();

       }" HAVE_DLOPEN)

    set(CMAKE_REQUIRED_LIBRARIES)

  endif()

  if (HAVE_DLOPEN)

    set(SDL_LOADSO_DLOPEN 1)

    set(HAVE_SDL_DLOPEN TRUE)

    file(GLOB DLOPEN_SOURCES ${SDL2_SOURCE_DIR}/src/loadso/dlopen/*.c)

    set(SOURCE_FILES ${SOURCE_FILES} ${DLOPEN_SOURCES})

    set(HAVE_SDL_LOADSO TRUE)

  endif()

endmacro(CheckDLOPEN)

# Requires:

# - n/a

macro(CheckOSS)

  if(OSS)

    set(OSS_HEADER_FILE "sys/soundcard.h")

    check_c_source_compiles("

        #include <sys/soundcard.h>

        int main() { int arg = SNDCTL_DSP_SETFRAGMENT; }" OSS_FOUND)

    if(NOT OSS_FOUND)

      set(OSS_HEADER_FILE "soundcard.h")

      check_c_source_compiles("

          #include <soundcard.h>

          int main() { int arg = SNDCTL_DSP_SETFRAGMENT; }" OSS_FOUND)

    endif(NOT OSS_FOUND)

    if(OSS_FOUND)

      set(HAVE_OSS TRUE)

      file(GLOB OSS_SOURCES ${SDL2_SOURCE_DIR}/src/audio/dsp/*.c)

      if(OSS_HEADER_FILE STREQUAL "soundcard.h")

        set(SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H 1)

      endif(OSS_HEADER_FILE STREQUAL "soundcard.h")

      set(SDL_AUDIO_DRIVER_OSS 1)

      set(SOURCE_FILES ${SOURCE_FILES} ${OSS_SOURCES})

      if(NETBSD OR OPENBSD)

        list(APPEND EXTRA_LIBS ossaudio)

      endif(NETBSD OR OPENBSD)

      set(HAVE_SDL_AUDIO TRUE)

    endif(OSS_FOUND)

  endif(OSS)

endmacro(CheckOSS)

# Requires:

# - n/a

# Optional:

# - ALSA_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckALSA)

  if(ALSA)

    CHECK_INCLUDE_FILE(alsa/asoundlib.h HAVE_ASOUNDLIB_H)

    if(HAVE_ASOUNDLIB_H)

      CHECK_LIBRARY_EXISTS(asound snd_pcm_open "" HAVE_LIBASOUND)

      set(HAVE_ALSA TRUE)

      file(GLOB ALSA_SOURCES ${SDL2_SOURCE_DIR}/src/audio/alsa/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${ALSA_SOURCES})

      set(SDL_AUDIO_DRIVER_ALSA 1)

      if(ALSA_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic ALSA loading")

        else()

          find_library(_ALSA_LIB asound)

          get_filename_component(F_ALSA_LIB ${_ALSA_LIB} NAME)

          set(SDL_AUDIO_DRIVER_ALSA_DYNAMIC "\"${F_ALSA_LIB}\"")

          set(HAVE_ALSA_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(ALSA_SHARED)

        list(APPEND EXTRA_LIBS asound)

      endif(ALSA_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(HAVE_ASOUNDLIB_H)

  endif(ALSA)

endmacro(CheckALSA)

# Requires:

# - PkgCheckModules

# Optional:

# - PULSEAUDIO_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckPulseAudio)

  if(PULSEAUDIO)

    pkg_check_modules(PKG_PULSEAUDIO libpulse-simple)

    if(PKG_PULSEAUDIO_FOUND)

      set(HAVE_PULSEAUDIO TRUE)

      file(GLOB PULSEAUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/pulseaudio/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${PULSEAUDIO_SOURCES})

      set(SDL_AUDIO_DRIVER_PULSEAUDIO 1)

      list(APPEND EXTRA_CFLAGS ${PKG_PULSEAUDIO_CFLAGS})

      if(PULSEAUDIO_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic PulseAudio loading")

        else()

          find_library(D_PULSE_LIB pulse-simple)

          get_filename_component(F_PULSE_LIB ${D_PULSE_LIB} NAME)

          set(SDL_AUDIO_DRIVER_PULSEAUDIO_DYNAMIC "\"${F_PULSE_LIB}\"")

          set(HAVE_PULSEAUDIO_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(PULSEAUDIO_SHARED)

        list(APPEND EXTRA_LDFLAGS ${PKG_PULSEAUDIO_LDFLAGS})

      endif(PULSEAUDIO_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(PKG_PULSEAUDIO_FOUND)

  endif(PULSEAUDIO)

endmacro(CheckPulseAudio)

# Requires:

# - PkgCheckModules

# Optional:

# - ESD_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckESD)

  if(ESD)

    pkg_check_modules(PKG_ESD esound)

    if(PKG_ESD_FOUND)

      set(HAVE_ESD TRUE)

      file(GLOB ESD_SOURCES ${SDL2_SOURCE_DIR}/src/audio/esd/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${ESD_SOURCES})

      set(SDL_AUDIO_DRIVER_ESD 1)

      list(APPEND EXTRA_CFLAGS ${PKG_ESD_CFLAGS})

      if(ESD_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic ESD loading")

        else()

          find_library(D_ESD_LIB esd)

          get_filename_component(F_ESD_LIB ${D_ESD_LIB} NAME)

          set(SDL_AUDIO_DRIVER_ESD_DYNAMIC "\"${F_ESD_LIB}\"")

          set(HAVE_ESD_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(ESD_SHARED)

        list(APPEND EXTRA_LDFLAGS ${PKG_ESD_LDFLAGS})

      endif(ESD_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(PKG_ESD_FOUND)

  endif(ESD)

endmacro(CheckESD)

# Requires:

# - n/a

# Optional:

# - ARTS_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckARTS)

  if(ARTS)

    find_program(ARTS_CONFIG arts-config)

    if(ARTS_CONFIG)

      execute_process(CMD_ARTSCFLAGS ${ARTS_CONFIG} --cflags

        OUTPUT_VARIABLE ARTS_CFLAGS OUTPUT_STRIP_TRAILING_WHITESPACE)

      list(APPEND EXTRA_CFLAGS ${ARTS_CFLAGS})

      execute_process(CMD_ARTSLIBS ${ARTS_CONFIG} --libs

        OUTPUT_VARIABLE ARTS_LIBS OUTPUT_STRIP_TRAILING_WHITESPACE)

      file(GLOB ARTS_SOURCES ${SDL2_SOURCE_DIR}/src/audio/arts/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${ARTS_SOURCES})

      set(SDL_AUDIO_DRIVER_ARTS 1)

      set(HAVE_ARTS TRUE)

      if(ARTS_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic ARTS loading")

        else()

          # TODO

          find_library(D_ARTS_LIB artsc)

          get_filename_component(F_ARTS_LIB ${D_ARTS_LIB} NAME)

          set(SDL_AUDIO_DRIVER_ARTS_DYNAMIC "\"${F_ARTS_LIB}\"")

          set(HAVE_ARTS_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(ARTS_SHARED)

        list(APPEND EXTRA_LDFLAGS ${ARTS_LIBS})

      endif(ARTS_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(ARTS_CONFIG)

  endif(ARTS)

endmacro(CheckARTS)

# Requires:

# - n/a

# Optional:

# - NAS_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckNAS)

  if(NAS)

    # TODO: set include paths properly, so the NAS headers are found

    check_include_file(audio/audiolib.h HAVE_NAS_H)

    find_library(D_NAS_LIB audio)

    if(HAVE_NAS_H AND D_NAS_LIB)

      set(HAVE_NAS TRUE)

      file(GLOB NAS_SOURCES ${SDL2_SOURCE_DIR}/src/audio/nas/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${NAS_SOURCES})

      set(SDL_AUDIO_DRIVER_NAS 1)

      if(NAS_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic NAS loading")

        else()

          get_filename_component(F_NAS_LIB ${D_NAS_LIB} NAME)

          set(SDL_AUDIO_DRIVER_NAS_DYNAMIC "\"${F_NAS_LIB}\"")

          set(HAVE_NAS_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(NAS_SHARED)

        list(APPEND EXTRA_LIBS ${D_NAS_LIB})

      endif(NAS_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(HAVE_NAS_H AND D_NAS_LIB)

  endif(NAS)

endmacro(CheckNAS)

# Requires:

# - n/a

# Optional:

# - SNDIO_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckSNDIO)

  if(SNDIO)

    # TODO: set include paths properly, so the sndio headers are found

    check_include_file(sndio.h HAVE_SNDIO_H)

    find_library(D_SNDIO_LIB audio)

    if(HAVE_SNDIO_H AND D_SNDIO_LIB)

      set(HAVE_SNDIO TRUE)

      file(GLOB SNDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/sndio/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${SNDIO_SOURCES})

      set(SDL_AUDIO_DRIVER_SNDIO 1)

      if(SNDIO_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic sndio loading")

        else()

          get_filename_component(F_SNDIO_LIB ${D_SNDIO_LIB} NAME)

          set(SDL_AUDIO_DRIVER_SNDIO_DYNAMIC "\"${F_SNDIO_LIB}\"")

          set(HAVE_SNDIO_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(SNDIO_SHARED)

        list(APPEND EXTRA_LIBS ${D_SNDIO_LIB})

      endif(SNDIO_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(HAVE_SNDIO_H AND D_SNDIO_LIB)

  endif(SNDIO)

endmacro(CheckSNDIO)

# Requires:

# - PkgCheckModules

# Optional:

# - FUSIONSOUND_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckFusionSound)

  if(FUSIONSOUND)

    pkg_check_modules(PKG_FUSIONSOUND fusionsound>=1.0.0)

    if(PKG_FUSIONSOUND_FOUND)

      set(HAVE_FUSIONSOUND TRUE)

      file(GLOB FUSIONSOUND_SOURCES ${SDL2_SOURCE_DIR}/src/audio/fusionsound/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${FUSIONSOUND_SOURCES})

      set(SDL_AUDIO_DRIVER_FUSIONSOUND 1)

      list(APPEND EXTRA_CFLAGS ${PKG_FUSIONSOUND_CFLAGS})

      if(FUSIONSOUND_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic FusionSound loading")

        else()

          find_library(D_FUSIONSOUND_LIB fusionsound)

          get_filename_component(F_FUSIONSOUND_LIB ${D_FUSIONSOUND_LIB} NAME)

          set(SDL_AUDIO_DRIVER_FUSIONSOUND_DYNAMIC "\"${F_FUSIONSOUND_LIB}\"")

          set(HAVE_FUSIONSOUND_SHARED TRUE)

        endif(NOT HAVE_DLOPEN)

      else(FUSIONSOUND_SHARED)

        list(APPEND EXTRA_LDFLAGS ${PKG_FUSIONSOUND_LDFLAGS})

      endif(FUSIONSOUND_SHARED)

      set(HAVE_SDL_AUDIO TRUE)

    endif(PKG_FUSIONSOUND_FOUND)

  endif(FUSIONSOUND)

endmacro(CheckFusionSound)

# Requires:

# - n/a

# Optional:

# - X11_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckX11)

  if(VIDEO_X11)

    foreach(_LIB X11 Xext Xcursor Xinerama Xi Xrandr Xrender Xss Xxf86vm)

      string(TOUPPER ${_LIB} _LNAME)

      find_library(${_LNAME}_LIB ${_LIB})

      if(${_LNAME}_LIB)

        # reduce the library name for shared linking

        get_filename_component(_TMP ${${_LNAME}_LIB} NAME)

        set(${_LNAME}_LIB ${_TMP})

      endif()

    endforeach()

    check_include_file(X11/Xcursor/Xcursor.h HAVE_XCURSOR_H)

    check_include_file(X11/extensions/Xinerama.h HAVE_XINERAMA_H)

    check_include_file(X11/extensions/XInput2.h HAVE_XINPUT_H)

    check_include_file(X11/extensions/Xrandr.h HAVE_XRANDR_H)

    check_include_file(X11/extensions/Xrender.h HAVE_XRENDER_H)

    check_include_file(X11/extensions/scrnsaver.h HAVE_XSS_H)

    check_include_file(X11/extensions/shape.h HAVE_XSHAPE_H)

    check_include_files("X11/Xlib.h;X11/extensions/xf86vmode.h" HAVE_XF86VM_H)

    check_include_files("X11/Xlib.h;X11/Xproto.h;X11/extensions/Xext.h" HAVE_XEXT_H)

    if(X11_LIB)

      if(NOT HAVE_XEXT_H)

        message_error("Missing Xext.h, maybe you need to install the libxext-dev package?")

      endif()

      set(HAVE_VIDEO_X11 TRUE)

      set(HAVE_SDL_VIDEO TRUE)

      file(GLOB X11_SOURCES ${SDL2_SOURCE_DIR}/src/video/x11/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${X11_SOURCES})

      set(SDL_VIDEO_DRIVER_X11 1)

      if(HAVE_GCC_FVISIBILITY)

        set(X11_SYMBOLS_PRIVATE TRUE)

      else()

        set(X11_SYMBOLS_PRIVATE FALSE)

      endif(HAVE_GCC_FVISIBILITY)

      if(APPLE)

        set(X11_SHARED OFF)

        set(X11_SYMBOLS_PRIVATE TRUE)

      endif(APPLE)

      check_function_exists("shmat" HAVE_SHMAT)

      if(NOT HAVE_SHMAT)

        check_library_exists(ipc shmat "" HAVE_SHMAT)

        if(HAVE_SHMAT)

          list(APPEND EXTRA_LIBS ipc)

        endif(HAVE_SHMAT)

        if(NOT HAVE_SHMAT)

          add_definitions(-DNO_SHARED_MEMORY)

        endif(NOT HAVE_SHMAT)

      endif(NOT HAVE_SHMAT)

      if(X11_SHARED)

        if(NOT HAVE_DLOPEN)

          message_warn("You must have SDL_LoadObject() support for dynamic X11 loading")

          set(HAVE_X11_SHARED FALSE)

          if(X11_SYMBOLS_PRIVATE)

            message_warn("You must have gcc4 (-fvisibility=hidden) for dynamic X11 loading")

            set(HAVE_X11_SHARED TRUE)

          endif(X11_SYMBOLS_PRIVATE)

        else(NOT HAVE_DLOPEN)

          set(HAVE_X11_SHARED TRUE)

        endif()

        if(HAVE_X11_SHARED)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC "\"${X11_LIB}\"")

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT "\"${XEXT_LIB}\"")

        else(HAVE_X11_SHARED)

          list(APPEND EXTRA_LIBS ${X11_LIB} ${XEXT_LIB})

        endif(HAVE_X11_SHARED)

      endif(X11_SHARED)

      set(CMAKE_REQUIRED_LIBRARIES ${X11_LIB} ${X11_LIB})

      check_c_source_compiles("

          #include <X11/Xlib.h>

          #include <X11/Xproto.h>

          #include <X11/extensions/Xext.h>

          #include <X11/extensions/extutil.h>

          extern XExtDisplayInfo* XextAddDisplay(XExtensionInfo* a,Display* b,_Xconst char* c,XExtensionHooks* d,int e,XPointer f);

          int main(int argc, char **argv) {}" HAVE_CONST_XEXT_ADDDISPLAY)

      if(HAVE_CONST_XEXT_ADDDISPLAY)

        set(SDL_VIDEO_DRIVER_X11_CONST_PARAM_XEXTADDDISPLAY 1)

      endif(HAVE_CONST_XEXT_ADDDISPLAY)

      check_c_source_compiles("

          #include <X11/Xlib.h>

          int main(int argc, char **argv) {

            Display *display;

            XEvent event;

            XGenericEventCookie *cookie = &event.xcookie;

            XNextEvent(display, &event);

            XGetEventData(display, cookie);

            XFreeEventData(display, cookie); }" HAVE_XGENERICEVENT)

      if(HAVE_XGENERICEVENT)

        set(SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS 1)

      endif(HAVE_XGENERICEVENT)

      check_c_source_compiles("

          #include <X11/Xlibint.h>

          extern int _XData32(Display *dpy,register _Xconst long *data,unsigned len);

          int main(int argc, char **argv) {}" HAVE_CONST_XDATA32)

      if(HAVE_CONST_XDATA32)

        set(SDL_VIDEO_DRIVER_X11_CONST_PARAM_XDATA32 1)

      endif(HAVE_CONST_XDATA32)

      check_function_exists(XkbKeycodeToKeysym SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM)

      if(VIDEO_X11_XCURSOR AND HAVE_XCURSOR_H)

        set(HAVE_VIDEO_X11_XCURSOR TRUE)

        if(HAVE_X11_SHARED AND XCURSOR_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR "\"${XCURSOR_LIB}\"")

        else(HAVE_X11_SHARED AND XCURSOR_LIB)

          list(APPEND EXTRA_LIBS ${XCURSOR_LIB})

        endif(HAVE_X11_SHARED AND XCURSOR_LIB)

        set(SDL_VIDEO_DRIVER_X11_XCURSOR 1)

      endif(VIDEO_X11_XCURSOR AND HAVE_XCURSOR_H)

      if(VIDEO_X11_XINERAMA AND HAVE_XINERAMA_H)

        set(HAVE_VIDEO_X11_XINERAMA TRUE)

        if(HAVE_X11_SHARED AND XINERAMA_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA "\"${XINERAMA_LIB}\"")

        else(HAVE_X11_SHARED AND XINERAMA_LIB)

          list(APPEND EXTRA_LIBS ${XINERAMA_LIB})

        endif(HAVE_X11_SHARED AND XINERAMA_LIB)

        set(SDL_VIDEO_DRIVER_X11_XINERAMA 1)

      endif(VIDEO_X11_XINERAMA AND HAVE_XINERAMA_H)

      if(VIDEO_X11_XINPUT AND HAVE_XINPUT_H)

        set(HAVE_VIDEO_X11_XINPUT TRUE)

        if(HAVE_X11_SHARED AND XI_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 "\"${XI_LIB}\"")

        else(HAVE_X11_SHARED AND XI_LIB)

          list(APPEND EXTRA_LIBS ${XI_LIB})

        endif(HAVE_X11_SHARED AND XI_LIB)

        set(SDL_VIDEO_DRIVER_X11_XINPUT2 1)

        # Check for multitouch

        check_c_source_compiles("

            #include <X11/Xlib.h>

            #include <X11/Xproto.h>

            #include <X11/extensions/XInput2.h>

            int event_type = XI_TouchBegin;

            XITouchClassInfo *t;

            Status XIAllowTouchEvents(Display *a,int b,unsigned int c,Window d,int f)

            {

              return (Status)0;

            }

            int main(int argc, char **argv) {}" HAVE_XINPUT2_MULTITOUCH)

        if(HAVE_XINPUT2_MULTITOUCH)

          set(SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH 1)

        endif(HAVE_XINPUT2_MULTITOUCH)

      endif(VIDEO_X11_XINPUT AND HAVE_XINPUT_H)

      if(VIDEO_X11_XRANDR AND HAVE_XRANDR_H)

        if(HAVE_X11_SHARED AND XRANDR_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR "\"${XRANDR_LIB}\"")

        else(HAVE_X11_SHARED AND XRANDR_LIB)

          list(APPEND EXTRA_LIBS ${XRANDR_LIB})

        endif(HAVE_X11_SHARED AND XRANDR_LIB)

        set(SDL_VIDEO_DRIVER_X11_XRANDR 1)

        set(HAVE_VIDEO_X11_XRANDR TRUE)

      endif(VIDEO_X11_XRANDR AND HAVE_XRANDR_H)

      if(VIDEO_X11_XSCRNSAVER AND HAVE_XSS_H)

        if(HAVE_X11_SHARED AND XSS_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS "\"${XSS_LIB}\"")

        else(HAVE_X11_SHARED AND XSS_LIB)

          list(APPEND EXTRA_LIBS ${XSS_LIB})

        endif(HAVE_X11_SHARED AND XSS_LIB)

        set(SDL_VIDEO_DRIVER_X11_XSCRNSAVER 1)

        set(HAVE_VIDEO_X11_XSCRNSAVER TRUE)

      endif(VIDEO_X11_XSCRNSAVER AND HAVE_XSS_H)

      if(VIDEO_X11_XSHAPE AND HAVE_XSHAPE_H)

        set(SDL_VIDEO_DRIVER_X11_XSHAPE 1)

        set(HAVE_VIDEO_X11_XSHAPE TRUE)

      endif(VIDEO_X11_XSHAPE AND HAVE_XSHAPE_H)

      if(VIDEO_X11_XVM AND HAVE_XF86VM_H)

        if(HAVE_X11_SHARED AND XF86VMODE_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE "\"${XF86VMODE_LIB}\"")

        else(HAVE_X11_SHARED AND XF86VMODE_LIB)

          list(APPEND EXTRA_LIBS ${XF86VMODE_LIB})

        endif(HAVE_X11_SHARED AND XF86VMODE_LIB)

        set(SDL_VIDEO_DRIVER_X11_XVIDMODE 1)

        set(HAVE_VIDEO_X11_XVM TRUE)

      endif(VIDEO_X11_XVM AND HAVE_XF86VM_H)

      set(CMAKE_REQUIRED_LIBRARIES)

    endif(X11_LIB)

  endif(VIDEO_X11)

endmacro(CheckX11)

# Requires:

# - n/a

#

macro(CheckCOCOA)

  if(VIDEO_COCOA)

    check_objc_source_compiles("

        #import <Cocoa/Cocoa.h>

        int main (int argc, char** argv) {}" HAVE_VIDEO_COCOA)

    if(HAVE_VIDEO_COCOA)

      file(GLOB COCOA_SOURCES ${SDL2_SOURCE_DIR}/src/video/cocoa/*.m)

      set_source_files_properties(${COCOA_SOURCES} PROPERTIES LANGUAGE C)

      set(SOURCE_FILES ${SOURCE_FILES} ${COCOA_SOURCES})

      set(SDL_VIDEO_DRIVER_COCOA 1)

      set(HAVE_SDL_VIDEO TRUE)

    endif(HAVE_VIDEO_COCOA)

  endif(VIDEO_COCOA)

endmacro(CheckCOCOA)

# Requires:

# - PkgCheckModules

# Optional:

# - DIRECTFB_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckDirectFB)

  if(VIDEO_DIRECTFB)

    pkg_check_modules(PKG_DIRECTFB directfb>=1.0.0)

    if(PKG_DIRECTFB_FOUND)

      set(HAVE_VIDEO_DIRECTFB TRUE)

      file(GLOB DIRECTFB_SOURCES ${SDL2_SOURCE_DIR}/src/video/directfb/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${DIRECTFB_SOURCES})

      set(SDL_VIDEO_DRIVER_DIRECTFB 1)

      set(SDL_VIDEO_RENDER_DIRECTFB 1)

      list(APPEND EXTRA_CFLAGS ${PKG_DIRECTFB_CFLAGS})

      if(DIRECTFB_SHARED)