Re: RFC: Reorganization of gfortran.texi

[Brooks Moses <brooks dot moses at codesourcery dot com>]

Jerry DeLisle wrote:
> This looks good.  Under invocations please add some cautionary notes about using 
> -ffast-math if we do not have that already.  This is in particular related to 
> complex math.

Thanks!  We don't have any mention of it at all, currently.  I've made a 
note to add something.

What, precisely, should the warning say?  Something along the lines of 
this?:  "Enables code optimizations which occasionally produce incorrect 
answers to mathematical operations, but will produce them faster than 
reliably correct answers can be generated.  This option should be 
avoided unless the compiled program can be thoroughly tested for 
correctness.  Operations on complex numbers with -ffast-math are 
particularly likely to obtain incorrect results."

Any other particular things, other than complex numbers, that should be 
warned about with it?

- Brooks