More Solaris Woes

I have been able to build postgres under Solaris, and even run the
initdb program, but when I try to start the postmaster, I get the
following:

FATAL: StreamServerPort: setsockopt (SO_REUSEADDR) failed: errno=71
postmaster: cannot create UNIX stream port

Errno 71 is EPROTO (Protocol error). This is coming from the
StreamServerPort function in src/backend/libpq/pqcomm.c:

if ((setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &one,
sizeof(one))) == -1)
{
sprintf(PQerrormsg,
"FATAL: StreamServerPort: setsockopt (SO_REUSEAD
DR) failed: errno=%d\n",
errno);
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
return (STATUS_ERROR);
}

Any ideas what might be going on?

Ocie