Hi, in http://www.cmake.org/pipermail/cmake/2009-November/033346.html I found the line: "If the file (.S) needs to be preprocessed, set the LANGUAGE source file property to C, this should work in most cases for now." Is this still the way to process .S-files. In 2009 it sounded so temporary. And if so, where is it documented? Greetings Micha