http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48383
--- Comment #2 from David Given <dg at cowlark dot com> 2011-03-31 09:38:58 UTC --- Adding -P does fix our immediate problem; thanks. I would note that there's no indication in the documentation as to why this option would help; I would never have known to use it if you hadn't told me! Some discussion of the issue there might be useful (and also in the 'Preprocessor Output Format' section).