On Mon, 2012-10-08 at 17:30 +0200, Vincent Lefevre wrote:
> On 2012-10-08 12:43:09 +0200, Oleg Endo wrote:
> > Doesn't look so. You can turn all warnings into errors by -Werror, but
> > there's no option to control this particular warning individually.
>
> It is possible to turn *particular* warnings into errors, not just
> all warnings, with -Werror=<list_of_warnings>.
Yes, that is true. But there is no way to turn off or turn into an
error the warning that is output in _this_particular_case_, because
there's no flag in GCC's code to do so.
gcc/toplev.c, function check_global_declaration_1, around line 470:
&& (warn_unused_function
|| TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
{
if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
pedwarn (input_location, 0, "%q+F used but never defined", decl);
This particular warning can be turned into an error by specifying
-pedantic-errors
Cheers,
Oleg
