https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86079
--- Comment #4 from jbeulich at novell dot com --- (In reply to Andreas Schwab from comment #3) > Did you use -xassembler-with-cpp? Without that it's INVALID. No, I did not, and the example given also is plain C code (minus the too many backslashes, which I've added just for demonstrating the issue - if you reduce them to one per line, I think you'll see the difference).