ClickHouse/cmake/find/ccache.cmake

option(ENABLE_CCACHE "Speedup re-compilations using ccache" ON)

if (NOT ENABLE_CCACHE)
    return()
endif()

find_program (CCACHE_FOUND ccache)

if (CCACHE_FOUND AND NOT CMAKE_CXX_COMPILER_LAUNCHER MATCHES "ccache" AND NOT CMAKE_CXX_COMPILER MATCHES "ccache")
   execute_process(COMMAND ${CCACHE_FOUND} "-V" OUTPUT_VARIABLE CCACHE_VERSION)
   string(REGEX REPLACE "ccache version ([0-9\\.]+).*" "\\1" CCACHE_VERSION ${CCACHE_VERSION})

   if (CCACHE_VERSION VERSION_GREATER "3.2.0" OR NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
      #message(STATUS "Using ${CCACHE_FOUND} ${CCACHE_VERSION}")
      set_property (GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_FOUND})
      set_property (GLOBAL PROPERTY RULE_LAUNCH_LINK ${CCACHE_FOUND})
   else ()
      message(${RECONFIGURE_MESSAGE_LEVEL} "Not using ${CCACHE_FOUND} ${CCACHE_VERSION} bug: https://bugzilla.samba.org/show_bug.cgi?id=8118")
   endif ()
elseif (NOT CCACHE_FOUND)
    message (${RECONFIGURE_MESSAGE_LEVEL} "Cannot use ccache")
endif ()