Has anyone noticed -ffast-math (gcc) fights against NaN's?

[Asko Kauppi <askok@...>]

I've been revising the LNUM patch (more of that later) and spend  
several hours today trying to understand what exactly -ffast-math does  
with regard to NaN's (not-a-numbers).

Basically, it does not seem to know them. It gives nan==nan and other  
no-can-dos that I regard as Completely Evil as to Lua compatibility.

What I'd ask the list is:

- are you using '-ffast-math' with Lua and gcc?
- have you noticed the inconsistent behaviour of NaN's?
- does it matter to you?

Greetings,   -asko