[failure] 21.0 "Russian White-pre7" XEmacs Lucid (beta39) on cygwin32

My first try to compile using cygnus32 fails on event-msw.c, having problems with SOCKET I guess. Help appreciated, Remek event-msw.c:616: parse error before `SOCKET' event-msw.c:616: warning: no semicolon at end of struct or union event-msw.c:621: parse error before `:' event-msw.c:622: parse error before `:' event-msw.c:623: parse error before `:' event-msw.c:624: parse error before `:' event-msw.c:630: sizeof applied to an incomplete type event-msw.c: In function `winsock_initiate_read': event-msw.c:635: dereferencing pointer to incomplete type event-msw.c:636: dereferencing pointer to incomplete type <snip> make[1]: *** [event-msw.o] Error 1 make: *** [src] Error 2