Tests/RunCMake/CompileFeatures/CMP0128NewNoUnnecessaryFlag-build-check.cmake - third_party/cmake - Git at Google

 foreach(flag @flags@)
   string(FIND "${actual_stdout}" "${flag}" position)

   if(NOT position EQUAL -1)
     set(RunCMake_TEST_FAILED "\"${flag}\" compile flag found.")
     break()
   endif()
 endforeach()
	foreach(flag @flags@)
	string(FIND "${actual_stdout}" "${flag}" position)

	if(NOT position EQUAL -1)
	set(RunCMake_TEST_FAILED "\"${flag}\" compile flag found.")
	break()
	endif()
	endforeach()