https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37874
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #5)
> (In reply to Chris Lattner from comment #0)
> > GCC rejects the former, but not the later.
> >
> > void f2(y, __attribute__(()) x);
> > void f3(__attribute__(()) x, y);
>
> GCC can be made to reject f3() with -Werror:
>
> $ /usr/local/bin/gcc -c -Wall -Wextra -pedantic -Werror 37874.c
> 37874.c:1:12: error: expected ‘)’ before ‘__attribute__’
> void f2(y, __attribute__(()) x);
> ^~~~~~~~~~~~~
> 37874.c:2:1: error: parameter names (without types) in function declaration
> [-Werror]
> void f3(__attribute__(()) x, y);
> ^~~~
> cc1: all warnings being treated as errors
>
> I see you fixed this for f4() at least for clang:
>
> $ /sw/opt/llvm-3.1/bin/clang-3.1 -c 37874.c
> 37874.c:1:12: error: expected identifier
> void f2(y, __attribute__(()) x);
> ^
> 37874.c:2:27: warning: type specifier missing, defaults to 'int'
> [-Wimplicit-int]
> void f3(__attribute__(()) x, y);
> ~~~~~~~~~~~~~ ^
> 37874.c:2:30: warning: type specifier missing, defaults to 'int'
> [-Wimplicit-int]
> void f3(__attribute__(()) x, y);
> ^
> 37874.c:3:9: error: expected parameter declarator
> void f4(__attribute__(()));
> ^
> 2 warnings and 2 errors generated.
Since clang rejects this, I'm making this an accepts-invalid
