+dnl --- Set configuration directory ---
+
+AC_ARG_WITH([etcdir],
+[ --with-etcdir=PATH set directory for configuration and key files
+ [default is /etc/become]],
+[etcdir="$withval"], [etcdir="/etc/become"])
+AC_SUBST(etcdir)
+AC_DEFINE_UNQUOTED(ETCDIR, "$etcdir")
+