Follow-up Comment #3, patch #3468 (project freeciv): Looking at the clang warnings lists I'm inclined to say that clang clean build should not be goal for us, or at least many warning types should be silenced with -Wno- -options instead of reworking the code to avoid the warning. For instance the "tautological compare" warnings because macro expansion often leads to value being compared to itself seem more like something that compiler should use for optimization, not to nag developers about. To work around them would make code much more complicated and likely introduce a lot of real bugs while fixing none.
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