Sébastien Hinderer <Sebastien.Hinderer@xxxxxxxx> writes: > Did you notice important changes in the supported warnings between > different versions of the same compiler? Yes, mostly that new version of the compiler add new warnings, and sometimes new warning flags. I probe for whether the compiler supports each flag during Autoconf, and periodically I review the release notes of the two compilers and add new interesting warning flags. > Are there many warnings in common between (at least one version of) > clang and (at least one version of) gcc, actually? I think there is some overlap between the flags (-W -Wall are the same, for instance), although I didn't investigate in detail because I started down the -Weverything with a blacklist path with Clang early on and GCC doesn't (so far as I know) support that. For the record, apparently the Clang folks don't really want people to use -Weverything. I still do anyway, for maintainer builds, and have not had any real problems with that (and have been grateful to pick up new warnings automatically), but it shouldn't be a default. -- Russ Allbery (eagle@xxxxxxxxx) <https://www.eyrie.org/~eagle/>
