+dnl HP-UX sux..
+AC_MSG_CHECKING(for missing socklen_t)
+AC_EGREP_HEADER(socklen_t, sys/socket.h,[AC_MSG_RESULT(no)],[
+ AC_DEFINE(NEED_SOCKLEN_T_DEFINE)
+ NEED_SOCKLEN_T_DEFINE=yes
+ AC_MSG_RESULT(missing.)])
+AC_SUBST(NEED_SOCKLEN_T_DEFINE)
+
+dnl HP-UX needs -d_XOPEN_SOURCE_EXTENDED for h_errno
+AC_MSG_CHECKING(for h_errno)
+AC_EGREP_HEADER(h_errno, netdb.h, [AC_MSG_RESULT(normal)],
+ [CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
+ AC_EGREP_HEADER(h_errno, netdb.h,
+ [AC_MSG_RESULT(needs _XOPEN_SOURCE_EXTENDED)],
+ [AC_MSG_ERROR("not found.")])
+ ])