https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120186
--- Comment #2 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Sam James from comment #1) > (In reply to John Paul Adrian Glaubitz from comment #0) > > Not sure how to save the preprocessed files in this case: > > There aren't any directly there, as these are unittests inside of > selftest.cc. You could go through the build log and find the command which > built selftest.cc. OK, will do that doing the next testrun. I testing the alpha backend now.