Removal of support for GCC hosted on UWIN

[dewar@gnat.com]

<<So if one considers UWIN an operating system (as the phase
"hosted on UWIN" implies) why the prohibition?
What is it about UWIN that is different from SunOS or HPUX - or come
to that Mingw32 where we don't have the source to MS's C runtime.

(Being devils advocate mainly - just to try and under stand
 what GCC folk understand by GPL.)
>>

The GCC folk understand nothing more and nothing less than what the
license says. Now as to the *intepretation* of that license, i.e. 
exactly what the exception means, that's subject to discussion, and
since there is no case law here, no one can speak with absolute
legal authority. As with any license agreement, ultimately the terms
have to be interpreted by a judge or jury :-)