option(platform_found "platform search" OFF)

if (Q_OS_MAC OR APPLE)
    include(${CMAKE_CURRENT_LIST_DIR}/platform_mac.cmake)
    set(platform_found ON)
endif()
if (Q_WS_WIN OR WIN32)
    include(${CMAKE_CURRENT_LIST_DIR}/platform_win.cmake)
    set(platform_found ON)
endif()

if (NOT platform_found)
    find_package(X11)
    if (X11_FOUND)
        include(${CMAKE_CURRENT_LIST_DIR}/platform_x11.cmake)
        set(platform_found ON)
    endif()
endif()

if (NOT platform_found)
    message(FATAL_ERROR "Unsupported platform! Supported are Windows, OS X, Linux/X11.")
endif()