On Fri, Jan 17, 2014 at 8:58 PM, Jakub Jelinek <ja...@redhat.com> wrote:
> It makes no sense to warn about unused macros that weren't defined > by the user, but the compiler instead injected them, the user > has no control on them. > For macros predefined at the beginning of the CU we don't get warnings > because they don't match MAIN_FILE_P, but macros added for #pragma GCC target > get location_t from the location of the pragma (and without libcpp hacks > that could possibly slow down preprocessing I don't see how to get around > it), so the following hack seems to be easiest. All newly created macros > when -Wunused-macros isn't on are initialized with macro->used = true, > and never warned about for this warning, so this patch just arranges for > all the cpp_define calls from #pragma GCC target to set that. > > Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk? > > 2014-01-17 Jakub Jelinek <ja...@redhat.com> > > PR target/58944 > * config/i386/i386-c.c (ix86_pragma_target_parse): Temporarily > clear cpp_get_options (parse_in)->warn_unused_macros for > ix86_target_macros_internal with cpp_define. > > * gcc.target/i386/pr58944.c: Drop -march=native from dg-options. > Remove dg-prune-output lines. OK. Thanks, Uros.
