[repost] Problem compiling 2.6.3.pre1 and pre2 under Cygwin with Mingw

[Nils]

Can anybody offer usggestions on what to do, or where else to ask? 
thanks --nils.

Hello, I'm trying to compile rsync under Cygwin using Mingw, but without
success so far.  The same problem appears in pre2.

$ CC='gcc -mno-cygwin' ./configure --build=mingw32
configure: Configuring rsync 2.6.3pre1
checking build system type... i386-pc-mingw32
checking host system type... i386-pc-mingw32
checking target system type... i386-pc-mingw32
checking for gcc... gcc -mno-cygwin
checking for C compiler default output file name... a.exe
...
checking for socklen_t... no
checking for socklen_t equivalent... configure: error: Cannot find a type to
use in place of socklen_t
$

In a Mail from 2002 I found the following:
  > This one"s easy to fix:
  >
  > #ifdef _WIN32
  > # include <winsock2.h>
  > #endif
  >
  > And be sure to add -lws2_32 when linking.
  >
  > Earnie.

...but haven't been able to get it to work, since I can't figure out how to
include this in the config check (or even if this is still the correct
solution).  I've attached the config log.

Thanks for any help!

Nils.