> On 27 May 2015, at 05:14, Rich Felker <dalias@libc.org> wrote:
> 
> I think we _don't_ want this in our final CFLAGS (in fact we may want
> the opposite, Wno-...) because it will probably error out on linker
> options in CFLAGS or C compiler options in assembler invocations.
> 
> But if it detects unknown options, we could use it just at configure
> time (if it's supported) to help determine when options are not
> supported.

Yes, that is what I intended.

-S