------- Comment #5 from matz at gcc dot gnu dot org 2006-10-18 14:04 -------
The problem is in libcpp/files.c:open_file_failed. It deliberately only
gives a warning when producing dependencies (and under some circumstances
doesn't even give a warning) for missing files. I think it does that under
the assumption that the user gave only -M (with -E implied), so he would
be interested in the preprocessor output nevertheless, and that can be
produced even with missing deps. The problem is, that giving -MD or -MMD
does not imply -E, i.e. the user really wants the deps to just be a
side-effect, as documented. Probably libcpp needs another option which can
be set from the driver, which would make it produce errors instead of
warnings.
--
matz at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |matz at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28435
