[Bug c/81824] Warn for missing attributes with function aliases

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81824

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Joseph S. Myers from comment #0)
> Note: this warning is only for attributes relating to the function itself,
> not to those relating to a particular name for the function.  For example,
> weak, alias, visibility attributes are expected to differ between different
> names and shouldn't be diagnosed.  It would be necessary to work out which
> existing function attributes fall in which category.

Joseph, to make sure I understand: foo in the example is an alias for __foo and
you want a warning for __foo.  What you're saying above is that if __foo were
nothrow, you wouldn't want to see a warning for foo pointing out that it's
missing the attribute.  Yes?