Tests/RunCMake/execute_process/MergeOutputFile.cmake - third_party/github.com/Kitware/CMake - Git at Google

 execute_process(
   COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_LIST_DIR}/MergeOutput.cmake
   OUTPUT_FILE out.txt
   ERROR_FILE out.txt
   )
 file(READ out.txt out)
 message("${out}")
	execute_process(
	COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_LIST_DIR}/MergeOutput.cmake
	OUTPUT_FILE out.txt
	ERROR_FILE out.txt
	)
	file(READ out.txt out)
	message("${out}")