[gfortran] Disable "long double" real kind on mingw32

[Mark Mitchell]

Danny Smith wrote:

> This should really be based on a configure test.  My mingw32 does 
> have proper I/O support for long double because I use a homegrown
> sprintf
> that is ISO C99 compliant.  

Perhaps it should be based on a configure *argument*.  Otherwise, it has
to be a link-time test.  Is there a function whose presence/absence can
determine whether or not long double I/O is available?

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713