https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87417
--- Comment #5 from Ilya Leoshkevich <iii at linux dot ibm.com> --- Ok, makes sense. I've just made a patch that adds the 5th, but it had to be special-cased for GENERATOR_FILE, and thus doesn't look too nice. FORMAT[0] == 'w' looks much cleaner.
