https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78211
--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> --- Hmm, good question whether it makes sense or not; some -fcompare-debug checking with LTO would be useful, the question is only what to compare. Simply rejecting -fcompare-debug with -ffat-lto-objects would be also acceptable for me, assuming that -fcompare-debug -fno-fat-lto-objects does something sensible.