find_program(CCACHE_BIN ccache)
if(CCACHE_BIN)
    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_BIN})
    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ${CCACHE_BIN})

    # ccache uses -I when compiling without preprocessor, which makes clang complain.
    if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments -fcolor-diagnostics")
        set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Qunused-arguments -fcolor-diagnostics")
    endif()
endif()
