-have_sendmsg="no"
-case $host_os in
-linux*)
- AC_SEARCH_LIBS(sendmsg, socket, [have_sendmsg="yes"], [have_sendmsg="no"])
- ;;
+AC_ARG_ENABLE(sendfds, AS_HELP_STRING([--disable-sendfds], [Support FD passing (default: auto)]),
+ [sendfds=$enableval], [sendfds=auto])
+
+case x$sendfds in
+xauto)
+ AC_SEARCH_LIBS(sendmsg, socket, [sendfds="yes"], [sendfds="no"])
+ ;;