Build krb5 on cygwin

Wed Apr 4 22:30:26 EDT 2018

On Thu, Apr 05, 2018 at 07:03:31AM +0800, Weijun Wang wrote:
> 
> 
> BTW, is there a configure option to force using MSVC? Now that I have gcc installed and it always choose gcc. I tried setting CC=/path/to/cl.exe but see
> 
> checking for gcc... /.../VC/bin/amd64/cl.exe
> checking whether the C compiler works... no

The build instructions in src/windows/README do not involve running
configure at all.

-Ben