EPROTONOSUPPORT   105 lib/errno.in.h #   define EPROTONOSUPPORT 135
EPROTONOSUPPORT   185 nt/inc/sys/socket.h #undef EPROTONOSUPPORT
EPROTONOSUPPORT   187 nt/inc/sys/socket.h #define EPROTONOSUPPORT         WSAEPROTONOSUPPORT