http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884
--- Comment #2 from Joey Ye <joey.ye at arm dot com> ---
(In reply to Andrew Pinski from comment #1)
> Comes from:
> if (p->target_binary != target_option_current_node)
> {
> (void) targetm.target_option.pragma_parse (NULL_TREE,
> p->target_binary);
> target_option_current_node = p->target_binary;
> }
>
>
> The front-end expects the target always to implement these target hooks it
> seems rather than the default.
>
> Really I think the arm back-end should implement them so that thumb2 code
> can be in the same source file as arm32 code and would help out LTO when
> people mix and match them.
It is a useful feature on ARM. I don't know why it isn't support now.
But this warning still need to be fixed as there are always some targets not
supportting this pragma.
