> David A. Wheeler wrote: > > AC_PROG_CC_WARNINGS([low]) # off, low, medium, high; default medium > > and in gcc "medium" might map to "-Wall". On Tue, 29 Oct 2013 21:00:05 -0700, Paul Eggert <eggert@xxxxxxxxxxx> wrote: > I'm afraid in practice things are not quite that simple. > The set of warning flags that are useful varies from project; > it's not a simple dial that one can turn from 1 to 10. Exactly the sort of stuff that calls out for a higher-level interface. Especially since there are compilers other than GCC, which don't have the same warning flags. > * But disable -Wtautological-constant-out-of-range-compare, > -Wpointer-sign, -Wformat-extra-args, -Wunused-command-line-argument, > -Wunused-value if using clang. I think there would need to be a higher-level "abstract" know (low, medium, high), and then a way to add specific compiler-specific options for specific circumstances. Something like: AC_PROG_CC_WARNINGS_ADD([clang], [-Wtautological-constant-out-of-range-compare -Wpointer-sign -Wformat-extra-args] > If you're interested in pursuing this, I suggest that > you look at the configure.ac for Emacs, grep, coreutils, > diffutils, and tar, and look for some of the variations. Thanks, nice lead. --- David A. Wheeler _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
