question about -ffast-math implementation

[Ian Lance Taylor]

On Mon, Jun 2, 2014 at 12:18 AM, Mike Izbicki <mike.izbicki@gmail.com> wrote:
>> Though for the gory details and authoritative answers I suppose you'd
> have to look into the source code.
>
> Where would I find the code for this?

This is the GCC source code.  There isn't one file that implements
-ffast-math.  -ffast-math expands to a set of other options, and then
various bits and pieces of code tests whether those options are
enabled.

Ian