How is lang.opt processed?

[Steve Kargl]

On Sat, Mar 12, 2005 at 11:04:22AM +0900, Neil Booth wrote:
> Toon Moene wrote:-
> 
> > >Thanks for the detailed explanation of how
> > >GCC options work.  I'm currently thinking
> > >of proposing a RFC with recommendations on
> > >how to address this problem with gfortran.
> > 
> > Ditto.  Jim, are you reading from some documentation about this option 
> > processing that I couldn't find ?  I've spend hours and hours to try to 
> > deduce the option processing rules from debugging various parts of the 
> > gcc driver, with no success.
> 
> gcc -v
> 
> is worth using just to see what it's passing to the underlying
> programs.  This would have immediately revealed that -i8 and -r8
> are being lost in the driver.

Yeah, tell us something we did not know!  The problem, until
Jim explained option handling, is *why* these were not passed
to gfortran.  Finding the info is/was non-obvious.  What is
even more appalling is that there is no way to inhibit the
swallowing of the options.

-- 
Steve