add #define to revert C99 inlining behaviour

[Andrew Pinski]

On Fri, 2006-11-03 at 18:59 -0800, Geoffrey Keating wrote:
> Apparently it is 'controversial' that -std=c99 should implement C99.
> 
> So, here is a #define.  You can switch it off, on again, off again, on
> again, and so on, to your heart's delight.

Didn't we agree on an option instead of a define inside GCC?

Thanks,
Andrew Pinski