Re: Patch for warnings in 64bit Windows builds

[Eli Zaretskii <eliz@gnu.org>]

> From: Andy Moreton <andrewjmoreton@gmail.com>
> Date: Thu, 30 Jul 2015 22:09:51 +0100
> 
> I've noticed some other warnings in the 64bit mingw64 builds requiring
> a similar fix:
> 
> ../../src/w32.c: In function 'maybe_load_unicows_dll':
> ../../src/w32.c:9174:25: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
>     pMultiByteToWideChar = GetProcAddress (ret, "MultiByteToWideChar");
>                          ^
> ../../src/w32.c:9175:25: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
>     pWideCharToMultiByte = GetProcAddress (ret, "WideCharToMultiByte");
>                          ^
> 
> There is also a warning about socket handling:
> 
> ../../src/w32.c: In function 'sys_socket':
> ../../src/w32.c:7336:14: warning: overflow in implicit constant conversion [-Woverflow]
>        return INVALID_SOCKET;
>               ^
> c:/msys64/mingw64/x86_64-w64-mingw32/include/psdk_inc/_socket_types.h
> contains:
> 
>         #if 1
>         typedef UINT_PTR	SOCKET;
>         #else
>         typedef INT_PTR		SOCKET;
>         #endif
> 
>         #define INVALID_SOCKET	(SOCKET)(~0)
> 
> Thus it is corect to warn about a conversion from unsigned 64bit to a
> signed 32bit value.

Please propose changes to eliminate those.  (I can propose them
myself, but I cannot test them.)

> >> I don't have copyright paperwork on file, so please let me know if that
> >> is required.
> >
> > Not needed, but you are encouraged to start the paperwork rolling, so
> > it will be ready for your next contribution.
> 
> Where do I find the appropriate forms ?

One place is in Gnulib's Git repository, in the doc/Copyright/
directory.  You want the file request-assign.future.  There are some
explanations in
https://www.gnu.org/prep/maintain/html_node/Copyright-Papers.html, but
the form is pretty much self-explanatory.

Thanks.