find_program(CCACHE_PROGRAM ccache)
if(CCACHE_PROGRAM)
    message(STATUS "Set up ccache ...")
    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
endif()

 

https://crascit.com/2016/04/09/using-ccache-with-cmake/

 

https://github.com/xizhibei/blog/issues/145