blob: 059a308acf001aac5f5c60c87770e8a2cb404ae1 (
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set(oldname "${CMAKE_CURRENT_BINARY_DIR}/input")
set(newname "${CMAKE_CURRENT_BINARY_DIR}/output")
file(WRITE "${oldname}" "")
execute_process(COMMAND "${CMAKE_COMMAND} -E sleep 1")
file(WRITE "${newname}" "")
file(TIMESTAMP "${newname}" before_copy UTC)
file(COPY_FILE "${oldname}" "${newname}" RESULT result ONLY_IF_DIFFERENT)
file(TIMESTAMP "${newname}" after_copy UTC)
if (NOT before_copy STREQUAL after_copy)
message(FATAL_ERROR
"${newname} was modified even though ONLY_IF_DIFFERENT was specified")
endif ()
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