# set friendly platform define
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
     set(WINDOWS TRUE)
     set(SYSTEM_STRING "Windows Desktop")
     if("${CMAKE_GENERATOR_PLATFORM}" STREQUAL "Win64")
        set(WIN64 TRUE)
     else()
        set(WIN32 TRUE)
     endif()
 elseif(${CMAKE_SYSTEM_NAME} MATCHES "Android")
     set(SYSTEM_STRING "Android")
 elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
     if(ANDROID)
         set(SYSTEM_STRING "Android")
     else()
         set(LINUX TRUE)
         set(SYSTEM_STRING "Linux")
     endif()
 elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
     if(IOS)
         set(APPLE TRUE)
         set(SYSTEM_STRING "IOS")
     else()
         set(APPLE TRUE)
         set(MACOSX TRUE)
         set(SYSTEM_STRING "Mac OSX")
     endif()
 endif()

# set platform specific path
set(_path_prefix ${CMAKE_CURRENT_SOURCE_DIR}/prebuilt/)
if(IOS)
    set(platform_name ios)
    set(platform_spec_path ios)
elseif(ANDROID)
    set(platform_name android)
    set(platform_spec_path android/${ANDROID_ABI})
elseif(WINDOWS)
    set(platform_name windows)
    if(WIN64)
        set(platform_spec_path windows/x64)
    else()
        set(platform_spec_path windows/x86)
    endif()
elseif(MACOSX)
    set(platform_name mac)
    set(platform_spec_path mac)
elseif(LINUX)
    set(platform_name linux)
    set(platform_spec_path linux/x64)
endif()

set(platform_spec_path "${_path_prefix}${platform_spec_path}")