if(CLANG)
    set(clang_executable ${CLANG})
else()
    find_program(clang_executable
        NAMES clang-mp-3.2 clang-mp-3.1 clang-mp-3.0 clang
        PATHS /opt/local/bin /usr/local/bin /usr/bin)
endif()

if (clang_executable)
    exec_program(${clang_executable} ARGS "-v" OUTPUT_VARIABLE clang_version_full)
    string(REGEX MATCH "[0-9]+\\.[0-9]+" clang_version_long "${clang_version_full}")
    string(REGEX REPLACE "([0-9]+\\.[0-9]+)" "\\1" clang_version "${clang_version_long}")
    #TODO: check version >= 3.0
    message(STATUS "Found CLANG: ${clang_executable} (version ${clang_version})")
else()
    message(FATAL_ERROR "No LLVM/Clang compiler found (required for engine_c target)")
endif()

set(CMAKE_C_COMPILER ${clang_executable})


find_package(OPENGL REQUIRED)
find_package(GLEW REQUIRED)
find_package(SDL REQUIRED)
find_package(SDL_mixer REQUIRED)
find_package(SDL_net REQUIRED)
find_package(SDL_image REQUIRED)
find_package(SDL_ttf REQUIRED)

configure_file(${hedgewars_SOURCE_DIR}/hedgewars/config.inc.in ${CMAKE_CURRENT_BINARY_DIR}/config.inc)


add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/hwengine.c"
        COMMAND "${EXECUTABLE_OUTPUT_PATH}/pas2c${CMAKE_EXECUTABLE_SUFFIX}"
        ARGS -n hwengine
             -i "${hedgewars_SOURCE_DIR}/hedgewars"
             #-i "~/xymengxy-webport/hedgewars"
             -o "${CMAKE_CURRENT_BINARY_DIR}"
             -a "${CMAKE_CURRENT_BINARY_DIR}"
        DEPENDS pas2c
    )

add_custom_target(engine_c ALL DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/hwengine.c")


add_subdirectory(rtl)

include_directories("${GLEW_INCLUDE_PATH}")
include_directories(rtl)

set(engine_src               uDebug.c             uLandTexture.c
        LuaPas.c             uFloat.c             uLocale.c
        SDLh.c               uGame.c              uMisc.c
        adler32.c            uGears.c             uMobile.c
        hwengine.c           uGearsHandlers.c     uRandom.c
        uAI.c                uGearsHandlersRope.c uRender.c
        uAIActions.c         uGearsHedgehog.c     uRenderUtils.c
        uAIAmmoTests.c       uGearsList.c         uScript.c
        uAILandMarks.c       uGearsRender.c       uSinTable.c
        uAIMisc.c            uGearsUtils.c        uSound.c
        uAmmos.c             uIO.c                uStats.c
        uCaptions.c          uInputHandler.c      uStore.c
        uChat.c              uLand.c              uTeams.c
        uCollisions.c        uLandGenMaze.c       uTextures.c
        uCommandHandlers.c   uLandGraphics.c      uTypes.c
        uCommands.c          uLandObjects.c       uUtils.c
        uConsole.c           uLandOutline.c       uVariables.c
        uConsts.c            uLandPainted.c       uVisualGears.c
        uCursor.c            uLandTemplates.c     uWorld.c
    )

set(engine_hdr               uGame.h              uFloat.h
        uLocale.h            SDLh.h               uMisc.h
        adler32.h            uDebug.h             uLandTexture.h
        LuaPas.h             uGears.h             uMobile.h
        uAI.h                uGearsHandlersRope.h uRender.h
        uAIActions.h         uGearsHedgehog.h     uRenderUtils.h
        uAIAmmoTests.h       uGearsList.h         uScript.h
        uGearsHandlers.h     uRandom.h
        uAILandMarks.h       uGearsRender.h       uSinTable.h
        uAIMisc.h            uGearsUtils.h        uSound.h
        uAmmos.h             uIO.h                uStats.h
        uCaptions.h          uInputHandler.h      uStore.h
        uChat.h              uLand.h              uTeams.h
        uCollisions.h        uLandGenMaze.h       uTextures.h
        uCommandHandlers.h   uLandGraphics.h      uTypes.h
        uCommands.h          uLandObjects.h       uUtils.h
        uConsole.h           uLandOutline.h       uVariables.h
        uConsts.h            uLandPainted.h       uVisualGears.h
        uCursor.h            uLandTemplates.h     uWorld.h
    )

add_executable(hwengine WIN32 ${engine_src})

target_link_libraries(hwengine  fpcrtl
                                ${LUA_LIBRARY}
                                ${OPENGL_LIBRARY}
                                ${SDL_LIBRARY}
                                ${SDLMIXER_LIBRARY}
                                ${SDLNET_LIBRARY}
                                ${SDLIMAGE_LIBRARY}
                                ${SDLTTF_LIBRARY}
                            )

add_dependencies(hwengine engine_c fpcrtl)