[PATCH] Fix make closures.c use dlmmap,dlmunmap on cygwin.

[Andrew Haley]

Dave Korn wrote:
> [ Re: http://gcc.gnu.org/ml/gcc-patches/2009-06/threads.html#02228 ]
> 
>     Hey all,
> 
>   Take 2 of this patch.  Works in the simplest way possible, by saying that
> cygwin is an exception to the rule about win32/64 platforms not using the
> local dlmmap/dlmunmap implementations.
> 
>   Sticklers for formatting will note that two of the #endif lines reach 81
> characters, because of the comment repeating the #if condition.  I didn't
> think it was worth wrapping the lines for such a tiny excess length in
> something this trivial, but I'll do so before committing if that's what the
> maintainers decide.
> 
> libffi/ChangeLog:
> 
> 	* closures.c (mmap, munmap):  Don't define replacement macros pointing
> 	to dl* versions on windows platforms.
> 
>   Bootstrapping now.  Assuming it completes and libffi tests run alright, OK?

Sure: obvious/trivial, fixes bootstrap.

Commit upstream and gcc trees, please.

Andrew.