On Wed, Jul 10, 2013 at 06:11:11PM +0200, Andi Kleen wrote: > FWIW basically -Werror -Wall defines a compiler version specific > variant of C. May be great for individual developers, but it's always > a serious mistake in any distributed Makefile.
Not always. Any project large enough (or serious enough about build reproducibility) to include its own toolchain can be written in that compiler-version-specific subset and nonetheless be worked on by more than one person. This is not uncommon in the BSDs, for example; see instances of "WARNS=4". It's an uncommon use case (and, I think, not a justification for changing -Wall), but it does exist and it is useful. --Jed
