https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81582
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- You need to use -C in order to preserve the comments. Or preprocess with -E -fdirectives-only.