macro(FindLibraryAndSONAME _LIB)

  string(TOUPPER ${_LIB} _UPPERLNAME)

  string(REGEX REPLACE "\\-" "_" _LNAME "${_UPPERLNAME}")

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

  if(${_LNAME}_LIB)

    # reduce the library name for shared linking

    get_filename_component(_LIB_REALPATH ${${_LNAME}_LIB} REALPATH)  # resolves symlinks

    get_filename_component(_LIB_JUSTNAME ${_LIB_REALPATH} NAME)

    if(APPLE)

      string(REGEX REPLACE "(\\.[0-9]*)\\.[0-9\\.]*dylib$" "\\1.dylib" _LIB_REGEXD "${_LIB_JUSTNAME}")

    else()

      string(REGEX REPLACE "(\\.[0-9]*)\\.[0-9\\.]*$" "\\1" _LIB_REGEXD "${_LIB_JUSTNAME}")

    endif()

    SET(_DEBUG_FindSONAME FALSE)

    if(_DEBUG_FindSONAME)

      message_warn("DYNLIB OUTPUTVAR: ${_LIB} ... ${_LNAME}_LIB")

      message_warn("DYNLIB ORIGINAL LIB: ${_LIB} ... ${${_LNAME}_LIB}")

      message_warn("DYNLIB REALPATH LIB: ${_LIB} ... ${_LIB_REALPATH}")

      message_warn("DYNLIB JUSTNAME LIB: ${_LIB} ... ${_LIB_JUSTNAME}")

      message_warn("DYNLIB REGEX'd LIB: ${_LIB} ... ${_LIB_REGEXD}")

    endif()

    message(STATUS "dynamic lib${_LIB} -> ${_LIB_REGEXD}")

    set(${_LNAME}_LIB_SONAME ${_LIB_REGEXD})

  endif()

endmacro()

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()

    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()

# 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()

    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()

      set(SDL_AUDIO_DRIVER_OSS 1)

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

      if(NETBSD OR OPENBSD)

        list(APPEND EXTRA_LIBS ossaudio)

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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_recover "" HAVE_LIBASOUND)

    endif()

    if(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()

          FindLibraryAndSONAME("asound")

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

          set(HAVE_ALSA_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LIBS asound)

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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()

          FindLibraryAndSONAME("pulse-simple")

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

          set(HAVE_PULSEAUDIO_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS ${PKG_PULSEAUDIO_LDFLAGS})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# Requires:

# - PkgCheckModules

# Optional:

# - JACK_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckJACK)

  if(JACK)

    pkg_check_modules(PKG_JACK jack)

    if(PKG_JACK_FOUND)

      set(HAVE_JACK TRUE)

      file(GLOB JACK_SOURCES ${SDL2_SOURCE_DIR}/src/audio/jack/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${JACK_SOURCES})

      set(SDL_AUDIO_DRIVER_JACK 1)

      list(APPEND EXTRA_CFLAGS ${PKG_JACK_CFLAGS})

      if(JACK_SHARED)

        if(NOT HAVE_DLOPEN)

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

        else()

          FindLibraryAndSONAME("jack")

          set(SDL_AUDIO_DRIVER_JACK_DYNAMIC "\"${JACK_LIB_SONAME}\"")

          set(HAVE_JACK_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS ${PKG_JACK_LDFLAGS})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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()

          FindLibraryAndSONAME(esd)

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

          set(HAVE_ESD_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS ${PKG_ESD_LDFLAGS})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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

          FindLibraryAndSONAME(artsc)

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

          set(HAVE_ARTS_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS ${ARTS_LIBS})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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()

          FindLibraryAndSONAME("audio")

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

          set(HAVE_NAS_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LIBS ${D_NAS_LIB})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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 sndio)

    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()

          FindLibraryAndSONAME("sndio")

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

          set(HAVE_SNDIO_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LIBS ${D_SNDIO_LIB})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# 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()

          FindLibraryAndSONAME("fusionsound")

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

          set(HAVE_FUSIONSOUND_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS ${PKG_FUSIONSOUND_LDFLAGS})

      endif()

      set(HAVE_SDL_AUDIO TRUE)

    endif()

  endif()

endmacro()

# Requires:

# - LIBSAMPLERATE

# Optional:

# - LIBSAMPLERATE_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckLibSampleRate)

  if(LIBSAMPLERATE)

    check_include_file(samplerate.h HAVE_LIBSAMPLERATE_H)

    if(HAVE_LIBSAMPLERATE_H)

      if(LIBSAMPLERATE_SHARED)

        if(NOT HAVE_DLOPEN)

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

        else()

          FindLibraryAndSONAME("samplerate")

          set(SDL_LIBSAMPLERATE_DYNAMIC "\"${SAMPLERATE_LIB_SONAME}\"")

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS -lsamplerate)

      endif()

    endif()

  endif()

endmacro()

# 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)

        FindLibraryAndSONAME("${_LIB}")

    endforeach()

    find_path(X_INCLUDEDIR X11/Xlib.h)

    if(X_INCLUDEDIR)

      set(X_CFLAGS "-I${X_INCLUDEDIR}")

    endif()

    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(APPLE)

        set(X11_SHARED OFF)

      endif()

      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()

        if(NOT HAVE_SHMAT)

          add_definitions(-DNO_SHARED_MEMORY)

          set(X_CFLAGS "${X_CFLAGS} -DNO_SHARED_MEMORY")

        endif()

      endif()

      if(X11_SHARED)

        if(NOT HAVE_DLOPEN)

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

          set(HAVE_X11_SHARED FALSE)

        else()

          set(HAVE_X11_SHARED TRUE)

        endif()

        if(HAVE_X11_SHARED)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC "\"${X11_LIB_SONAME}\"")

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

        else()

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

        endif()

      endif()

      set(SDL_CFLAGS "${SDL_CFLAGS} ${X_CFLAGS}")

      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()

      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()

      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_SONAME}\"")

        else()

          list(APPEND EXTRA_LIBS ${XCURSOR_LIB})

        endif()

        set(SDL_VIDEO_DRIVER_X11_XCURSOR 1)

      endif()

      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_SONAME}\"")

        else()

          list(APPEND EXTRA_LIBS ${XINERAMA_LIB})

        endif()

        set(SDL_VIDEO_DRIVER_X11_XINERAMA 1)

      endif()

      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_SONAME}\"")

        else()

          list(APPEND EXTRA_LIBS ${XI_LIB})

        endif()

        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()

      endif()

      if(VIDEO_X11_XRANDR AND HAVE_XRANDR_H)

        if(HAVE_X11_SHARED AND XRANDR_LIB)

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

        else()

          list(APPEND EXTRA_LIBS ${XRANDR_LIB})

        endif()

        set(SDL_VIDEO_DRIVER_X11_XRANDR 1)

        set(HAVE_VIDEO_X11_XRANDR TRUE)

      endif()

      if(VIDEO_X11_XSCRNSAVER AND HAVE_XSS_H)

        if(HAVE_X11_SHARED AND XSS_LIB)

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

        else()

          list(APPEND EXTRA_LIBS ${XSS_LIB})

        endif()

        set(SDL_VIDEO_DRIVER_X11_XSCRNSAVER 1)

        set(HAVE_VIDEO_X11_XSCRNSAVER TRUE)

      endif()

      if(VIDEO_X11_XSHAPE AND HAVE_XSHAPE_H)

        set(SDL_VIDEO_DRIVER_X11_XSHAPE 1)

        set(HAVE_VIDEO_X11_XSHAPE TRUE)

      endif()

      if(VIDEO_X11_XVM AND HAVE_XF86VM_H)

        if(HAVE_X11_SHARED AND XXF86VM_LIB)

          set(SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE "\"${XXF86VM_LIB_SONAME}\"")

        else()

          list(APPEND EXTRA_LIBS ${XXF86VM_LIB})

        endif()

        set(SDL_VIDEO_DRIVER_X11_XVIDMODE 1)

        set(HAVE_VIDEO_X11_XVM TRUE)

      endif()

      set(CMAKE_REQUIRED_LIBRARIES)

    endif()

  endif()

endmacro()

# Requires:

# - EGL

# - PkgCheckModules

# Optional:

# - MIR_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckMir)

    if(VIDEO_MIR)

        find_library(MIR_LIB mirclient mircommon egl)

        pkg_check_modules(MIR_TOOLKIT mirclient>=0.26 mircommon)

        pkg_check_modules(EGL egl)

        pkg_check_modules(XKB xkbcommon)

        if (MIR_LIB AND MIR_TOOLKIT_FOUND AND EGL_FOUND AND XKB_FOUND)

            set(HAVE_VIDEO_MIR TRUE)

            set(HAVE_SDL_VIDEO TRUE)

            file(GLOB MIR_SOURCES ${SDL2_SOURCE_DIR}/src/video/mir/*.c)

            set(SOURCE_FILES ${SOURCE_FILES} ${MIR_SOURCES})

            set(SDL_VIDEO_DRIVER_MIR 1)

            list(APPEND EXTRA_CFLAGS ${MIR_TOOLKIT_CFLAGS} ${EGL_CFLAGS} ${XKB_CFLAGS})

            if(MIR_SHARED)

                if(NOT HAVE_DLOPEN)

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

                else()

                    FindLibraryAndSONAME(mirclient)

                    FindLibraryAndSONAME(xkbcommon)

                    set(SDL_VIDEO_DRIVER_MIR_DYNAMIC "\"${MIRCLIENT_LIB_SONAME}\"")

                    set(SDL_VIDEO_DRIVER_MIR_DYNAMIC_XKBCOMMON "\"${XKBCOMMON_LIB_SONAME}\"")

                    set(HAVE_MIR_SHARED TRUE)

                endif()

            else()

                set(EXTRA_LIBS ${MIR_TOOLKIT_LIBRARIES} ${EXTRA_LIBS})

            endif()

        endif()

    endif()

endmacro()

macro(WaylandProtocolGen _SCANNER _XML _PROTL)

    set(_WAYLAND_PROT_C_CODE "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols/${_PROTL}-protocol.c")

    set(_WAYLAND_PROT_H_CODE "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols/${_PROTL}-client-protocol.h")

    add_custom_command(

        OUTPUT "${_WAYLAND_PROT_H_CODE}"

        DEPENDS "${_XML}"

        COMMAND "${_SCANNER}"

        ARGS client-header "${_XML}" "${_WAYLAND_PROT_H_CODE}"

    )

    add_custom_command(

        OUTPUT "${_WAYLAND_PROT_C_CODE}"

        DEPENDS "${_WAYLAND_PROT_H_CODE}"

        COMMAND "${_SCANNER}"

        ARGS code "${_XML}" "${_WAYLAND_PROT_C_CODE}"

    )

    set(SOURCE_FILES ${SOURCE_FILES} "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols/${_PROTL}-protocol.c")

endmacro()

# Requires:

# - EGL

# - PkgCheckModules

# Optional:

# - WAYLAND_SHARED opt

# - HAVE_DLOPEN opt

macro(CheckWayland)

  if(VIDEO_WAYLAND)

    pkg_check_modules(WAYLAND wayland-client wayland-scanner wayland-protocols wayland-egl wayland-cursor egl xkbcommon)

    # We have to generate some protocol interface code for some various Wayland features.

    if(WAYLAND_FOUND)

      execute_process(

        COMMAND ${PKG_CONFIG_EXECUTABLE} --variable=pkgdatadir wayland-client

        WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"

        RESULT_VARIABLE WAYLAND_CORE_PROTOCOL_DIR_RC

        OUTPUT_VARIABLE WAYLAND_CORE_PROTOCOL_DIR

        ERROR_QUIET

        OUTPUT_STRIP_TRAILING_WHITESPACE

      )

      if(NOT WAYLAND_CORE_PROTOCOL_DIR_RC EQUAL 0)

        set(WAYLAND_FOUND FALSE)

      endif()

    endif()

    if(WAYLAND_FOUND)

      execute_process(

        COMMAND ${PKG_CONFIG_EXECUTABLE} --variable=pkgdatadir wayland-protocols

        WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"

        RESULT_VARIABLE WAYLAND_PROTOCOLS_DIR_RC

        OUTPUT_VARIABLE WAYLAND_PROTOCOLS_DIR

        ERROR_QUIET

        OUTPUT_STRIP_TRAILING_WHITESPACE

      )

      if(NOT WAYLAND_PROTOCOLS_DIR_RC EQUAL 0)

        set(WAYLAND_FOUND FALSE)

      endif()

    endif()

    if(WAYLAND_FOUND)

      execute_process(

        COMMAND ${PKG_CONFIG_EXECUTABLE} --variable=wayland_scanner wayland-scanner

        WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"

        RESULT_VARIABLE WAYLAND_SCANNER_RC

        OUTPUT_VARIABLE WAYLAND_SCANNER

        ERROR_QUIET

        OUTPUT_STRIP_TRAILING_WHITESPACE

      )

      if(NOT WAYLAND_SCANNER_RC EQUAL 0)

        set(WAYLAND_FOUND FALSE)

      endif()

    endif()

    if(WAYLAND_FOUND)

      link_directories(

          ${WAYLAND_LIBRARY_DIRS}

      )

      include_directories(

          ${WAYLAND_INCLUDE_DIRS}

      )

      set(HAVE_VIDEO_WAYLAND TRUE)

      set(HAVE_SDL_VIDEO TRUE)

      file(GLOB WAYLAND_SOURCES ${SDL2_SOURCE_DIR}/src/video/wayland/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${WAYLAND_SOURCES})

      # We have to generate some protocol interface code for some unstable Wayland features.

      file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols")

      include_directories("${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols")

      WaylandProtocolGen("${WAYLAND_SCANNER}" "${WAYLAND_CORE_PROTOCOL_DIR}/wayland.xml" "wayland")

      foreach(_PROTL relative-pointer-unstable-v1 pointer-constraints-unstable-v1)

        string(REGEX REPLACE "\\-unstable\\-.*$" "" PROTSUBDIR ${_PROTL})

        WaylandProtocolGen("${WAYLAND_SCANNER}" "${WAYLAND_PROTOCOLS_DIR}/unstable/${PROTSUBDIR}/${_PROTL}.xml" "${_PROTL}")

      endforeach()

      if(VIDEO_WAYLAND_QT_TOUCH)

          set(SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH 1)

      endif()

      if(WAYLAND_SHARED)

        if(NOT HAVE_DLOPEN)

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

        else()

          FindLibraryAndSONAME(wayland-client)

          FindLibraryAndSONAME(wayland-egl)

          FindLibraryAndSONAME(wayland-cursor)

          FindLibraryAndSONAME(xkbcommon)

          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC "\"${WAYLAND_CLIENT_LIB_SONAME}\"")

          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL "\"${WAYLAND_EGL_LIB_SONAME}\"")

          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR "\"${WAYLAND_CURSOR_LIB_SONAME}\"")

          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON "\"${XKBCOMMON_LIB_SONAME}\"")

          set(HAVE_WAYLAND_SHARED TRUE)

        endif()

      else()

        set(EXTRA_LIBS ${WAYLAND_LIBRARIES} ${EXTRA_LIBS})

      endif()

      set(SDL_VIDEO_DRIVER_WAYLAND 1)

    endif()

  endif()

endmacro()

# Requires:

# - n/a

#

macro(CheckCOCOA)

  if(VIDEO_COCOA)

    if(APPLE) # Apple always has Cocoa.

      set(HAVE_VIDEO_COCOA TRUE)

    endif()

    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()

  endif()

endmacro()

# 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)

        if(NOT HAVE_DLOPEN)

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

        else()

          FindLibraryAndSONAME("directfb")

          set(SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC "\"${DIRECTFB_LIB_SONAME}\"")

          set(HAVE_DIRECTFB_SHARED TRUE)

        endif()

      else()

        list(APPEND EXTRA_LDFLAGS ${PKG_DIRECTFB_LDFLAGS})

      endif()

      set(HAVE_SDL_VIDEO TRUE)

    endif()

  endif()

endmacro()

# Requires:

# - n/a

macro(CheckVivante)

  if(VIDEO_VIVANTE)

    check_c_source_compiles("

        #include <gc_vdk.h>

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

    check_c_source_compiles("

        #define LINUX

        #define EGL_API_FB

        #include <EGL/eglvivante.h>

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

    if(HAVE_VIDEO_VIVANTE_VDK OR HAVE_VIDEO_VIVANTE_EGL_FB)

      set(HAVE_VIDEO_VIVANTE TRUE)

      set(HAVE_SDL_VIDEO TRUE)

      file(GLOB VIVANTE_SOURCES ${SDL2_SOURCE_DIR}/src/video/vivante/*.c)

      set(SOURCE_FILES ${SOURCE_FILES} ${VIVANTE_SOURCES})

      set(SDL_VIDEO_DRIVER_VIVANTE 1)

      if(HAVE_VIDEO_VIVANTE_VDK)

        set(SDL_VIDEO_DRIVER_VIVANTE_VDK 1)

        list(APPEND EXTRA_LIBS VDK VIVANTE)

      else()

        set(SDL_CFLAGS "${SDL_CFLAGS} -DLINUX -DEGL_API_FB")

        list(APPEND EXTRA_LIBS EGL)

      endif(HAVE_VIDEO_VIVANTE_VDK)

    endif(HAVE_VIDEO_VIVANTE_VDK OR HAVE_VIDEO_VIVANTE_EGL_FB)

  endif(VIDEO_VIVANTE)

endmacro(CheckVivante)

# Requires:

# - nada

macro(CheckOpenGLX11)

  if(VIDEO_OPENGL)

    check_c_source_compiles("

        #include <GL/gl.h>

        #include <GL/glx.h>

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

    if(HAVE_VIDEO_OPENGL)

      set(HAVE_VIDEO_OPENGL TRUE)

      set(SDL_VIDEO_OPENGL 1)

      set(SDL_VIDEO_OPENGL_GLX 1)

      set(SDL_VIDEO_RENDER_OGL 1)

    endif()

  endif()

endmacro()

# Requires:

# - nada

macro(CheckOpenGLESX11)

  if(VIDEO_OPENGLES)

    check_c_source_compiles("

        #define EGL_API_FB

        #include <EGL/egl.h>

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

    if(HAVE_VIDEO_OPENGL_EGL)

        set(SDL_VIDEO_OPENGL_EGL 1)

    endif()

    check_c_source_compiles("

      #include <GLES/gl.h>

      #include <GLES/glext.h>

      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V1)

    if(HAVE_VIDEO_OPENGLES_V1)

        set(HAVE_VIDEO_OPENGLES TRUE)

        set(SDL_VIDEO_OPENGL_ES 1)

        set(SDL_VIDEO_RENDER_OGL_ES 1)

    endif()

    check_c_source_compiles("

      #include <GLES2/gl2.h>

      #include <GLES2/gl2ext.h>

      int main (int argc, char** argv) {}" HAVE_VIDEO_OPENGLES_V2)

    if(HAVE_VIDEO_OPENGLES_V2)

        set(HAVE_VIDEO_OPENGLES TRUE)

        set(SDL_VIDEO_OPENGL_ES2 1)

        set(SDL_VIDEO_RENDER_OGL_ES2 1)

    endif()

  endif()

endmacro()

# Requires:

# - nada

# Optional:

# - THREADS opt

# Sets:

# PTHREAD_CFLAGS

# PTHREAD_LIBS

macro(CheckPTHREAD)

  if(PTHREADS)

    if(ANDROID)

      # the android libc provides built-in support for pthreads, so no

      # additional linking or compile flags are necessary

    elseif(LINUX)

      set(PTHREAD_CFLAGS "-D_REENTRANT")

      set(PTHREAD_LDFLAGS "-pthread")

    elseif(BSDI)

      set(PTHREAD_CFLAGS "-D_REENTRANT -D_THREAD_SAFE")

      set(PTHREAD_LDFLAGS "")

    elseif(DARWIN)

      set(PTHREAD_CFLAGS "-D_THREAD_SAFE")

      # causes Carbon.p complaints?

      # set(PTHREAD_CFLAGS "-D_REENTRANT -D_THREAD_SAFE")

      set(PTHREAD_LDFLAGS "")

    elseif(FREEBSD)

      set(PTHREAD_CFLAGS "-D_REENTRANT -D_THREAD_SAFE")

      set(PTHREAD_LDFLAGS "-pthread")

    elseif(NETBSD)

      set(PTHREAD_CFLAGS "-D_REENTRANT -D_THREAD_SAFE")

      set(PTHREAD_LDFLAGS "-lpthread")

    elseif(OPENBSD)

      set(PTHREAD_CFLAGS "-D_REENTRANT")

      set(PTHREAD_LDFLAGS "-pthread")

    elseif(SOLARIS)

      set(PTHREAD_CFLAGS "-D_REENTRANT")

      set(PTHREAD_LDFLAGS "-pthread -lposix4")

    elseif(SYSV5)

      set(PTHREAD_CFLAGS "-D_REENTRANT -Kthread")

      set(PTHREAD_LDFLAGS "")

    elseif(AIX)

      set(PTHREAD_CFLAGS "-D_REENTRANT -mthreads")

      set(PTHREAD_LDFLAGS "-pthread")

    elseif(HPUX)

      set(PTHREAD_CFLAGS "-D_REENTRANT")

      set(PTHREAD_LDFLAGS "-L/usr/lib -pthread")

    elseif(HAIKU)

      set(PTHREAD_CFLAGS "-D_REENTRANT")

      set(PTHREAD_LDFLAGS "")

    else()

      set(PTHREAD_CFLAGS "-D_REENTRANT")

      set(PTHREAD_LDFLAGS "-lpthread")

    endif()

    # Run some tests

    set(ORIG_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")

    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${PTHREAD_CFLAGS} ${PTHREAD_LDFLAGS}")

    if(CMAKE_CROSSCOMPILING)

      set(HAVE_PTHREADS 1)

    else()

      check_c_source_runs("

        #include <pthread.h>

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

          pthread_attr_t type;

          pthread_attr_init(&type);

          return 0;

        }" HAVE_PTHREADS)

    endif()

    if(HAVE_PTHREADS)

      set(SDL_THREAD_PTHREAD 1)

      list(APPEND EXTRA_CFLAGS ${PTHREAD_CFLAGS})

      list(APPEND EXTRA_LDFLAGS ${PTHREAD_LDFLAGS})

      set(SDL_CFLAGS "${SDL_CFLAGS} ${PTHREAD_CFLAGS}")

      list(APPEND SDL_LIBS ${PTHREAD_LDFLAGS})

      check_c_source_compiles("

        #include <pthread.h>

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

          pthread_mutexattr_t attr;

          pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);

          return 0;

        }" HAVE_RECURSIVE_MUTEXES)

      if(HAVE_RECURSIVE_MUTEXES)

        set(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX 1)

      else()

        check_c_source_compiles("

            #include <pthread.h>

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

              pthread_mutexattr_t attr;

              pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);

              return 0;

            }" HAVE_RECURSIVE_MUTEXES_NP)

        if(HAVE_RECURSIVE_MUTEXES_NP)

          set(SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP 1)

        endif()

      endif()

      if(PTHREADS_SEM)

        check_c_source_compiles("#include <pthread.h>

                                 #include <semaphore.h>

                                 int main(int argc, char **argv) { return 0; }" HAVE_PTHREADS_SEM)

        if(HAVE_PTHREADS_SEM)

          check_c_source_compiles("

              #include <pthread.h>

              #include <semaphore.h>

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

                  sem_timedwait(NULL, NULL);

                  return 0;

              }" HAVE_SEM_TIMEDWAIT)

        endif()

      endif()

      check_c_source_compiles("

          #include <pthread.h>

          #include <pthread_np.h>

          int main(int argc, char** argv) { return 0; }" HAVE_PTHREAD_NP_H)

      check_function_exists(pthread_setname_np HAVE_PTHREAD_SETNAME_NP)

      check_function_exists(pthread_set_name_np HAVE_PTHREAD_SET_NAME_NP)

      set(SOURCE_FILES ${SOURCE_FILES}

          ${SDL2_SOURCE_DIR}/src/thread/pthread/SDL_systhread.c

          ${SDL2_SOURCE_DIR}/src/thread/pthread/SDL_sysmutex.c   # Can be faked, if necessary

          ${SDL2_SOURCE_DIR}/src/thread/pthread/SDL_syscond.c    # Can be faked, if necessary

          ${SDL2_SOURCE_DIR}/src/thread/pthread/SDL_systls.c

          )

      if(HAVE_PTHREADS_SEM)

        set(SOURCE_FILES ${SOURCE_FILES}

            ${SDL2_SOURCE_DIR}/src/thread/pthread/SDL_syssem.c)

      else()

        set(SOURCE_FILES ${SOURCE_FILES}

            ${SDL2_SOURCE_DIR}/src/thread/generic/SDL_syssem.c)

      endif()

      set(HAVE_SDL_THREADS TRUE)

    endif()

    set(CMAKE_REQUIRED_FLAGS "${ORIG_CMAKE_REQUIRED_FLAGS}")

  endif()

endmacro()

# Requires

# - nada

# Optional:

# Sets:

# USB_LIBS

# USB_CFLAGS

macro(CheckUSBHID)