EPFNOSUPPORT      137 lib/errno.in.h #  define EPFNOSUPPORT    10046  /* not required by POSIX */
EPFNOSUPPORT      197 nt/inc/sys/socket.h #undef EPFNOSUPPORT
EPFNOSUPPORT      199 nt/inc/sys/socket.h #define EPFNOSUPPORT            WSAEPFNOSUPPORT