cmake/Modules/SelectRTBackend.cmake

   1 function(SelectRTBackend)
   2   check_library_exists(rt clock_gettime "time.h" HAVE_CLOCK_GETTIME_RT)
   3
   4   if(NOT HAVE_CLOCK_GETTIME_RT)
   5     check_function_exists(clock_gettime HAVE_CLOCK_GETTIME)
   6     if(NOT HAVE_CLOCK_GETTIME)
   7       check_library_exists(c clock_get_time "mach/time.h" HAVE_CLOCK_GET_TIME)
   8       if(NOT HAVE_CLOCK_GET_TIME)
   9         message(FATAL_ERROR "Didn't find clock_gettime() or clock_get_time()!")
  10       endif()
  11     endif()
  12   else()
  13     set(LIBRT rt PARENT_SCOPE)
  14   endif()
  15 endfunction()