message("System name: ${CMAKE_HOST_SYSTEM_NAME}")
if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
    add_compile_definitions(PLATFORM_WINDOWS)
elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
    add_compile_definitions(PLATFORM_LINUX)
elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Darwin")
    add_compile_definitions(PLATFORM_MACOS)
else()
    add_compile_definitions(PLATFORM_UNKNOWN)
endif()