New problem with Windows port

[address@hidden]

Hello friends,
while I was applying with my hacks on the latest candidate release of GUILE, I 
got this error in many sources, apparently without solution:

.libs/socket.o: In function `scm_socket':
C:/msys/home/Carlo/guile/libguile/../../guile-1.9.15/libguile/socket.c:439: 
undefined reference to `socket_used_without_requesting_gnulib_module_socket'

Is it possible to know the magic behind this 
"socket_used_without_requesting_gnulib_module_socket" since it's not declared 
in any place?
Thank  you.

Sincerely,

Carlo Bramini.