cmake HAS_PING examples

OSGeo/PROJ test/CMakeLists.txt :24 

find_program(HAS_PING ping)

OSGeo/PROJ test/CMakeLists.txt :32 

execute_process(
        COMMAND ${HAS_PING} www.google.com ${PING_COUNT} 2
        OUTPUT_QUIET
        ERROR_QUIET
        RESULT_VARIABLE NO_CONNECTION
      )