Warning when configuring samba under cygwn

[Adrian Hawryluk]

configure: WARNING: winsock2.h: present but cannot be compiled
configure: WARNING: winsock2.h:     check for missing prerequisite headers?
configure: WARNING: winsock2.h: see the Autoconf documentation
configure: WARNING: winsock2.h:     section "Present But Cannot Be Compiled"
configure: WARNING: winsock2.h: proceeding with the compiler's result
configure: WARNING:     ## ---------------------------------------- ##
configure: WARNING:     ## Report this to samba-technical at samba.org ##
configure: WARNING:     ## ---------------------------------------- ##
checking for winsock2.h... no
checking ws2tcpip.h usability... no
checking ws2tcpip.h presence... yes
configure: WARNING: ws2tcpip.h: present but cannot be compiled
configure: WARNING: ws2tcpip.h:     check for missing prerequisite headers?
configure: WARNING: ws2tcpip.h: see the Autoconf documentation
configure: WARNING: ws2tcpip.h:     section "Present But Cannot Be Compiled"
configure: WARNING: ws2tcpip.h: proceeding with the compiler's result
configure: WARNING:     ## ---------------------------------------- ##
configure: WARNING:     ## Report this to samba-technical at samba.org ##
configure: WARNING:     ## ---------------------------------------- ##


This appears to be more critical than something that should be a warning.
What would be causing it and how do I correct for it?

Thanks,


Adrian