+{ echo "$as_me:$LINENO: checking how to send mail" >&5
+echo $ECHO_N "checking how to send mail... $ECHO_C" >&6; }
+
+# Check whether --with-mail was given.
+if test "${with_mail+set}" = set; then
+ withval=$with_mail;
+else
+ withval="sendmail"
+fi
+
+if test -r "${srcdir}/src/mail-${withval}.c" ; then
+ { echo "$as_me:$LINENO: result: $withval" >&5
+echo "${ECHO_T}$withval" >&6; }
+ MODULE_OBJS="$MODULE_OBJS mail-${withval}.\$(OBJEXT)"
+else
+ { { echo "$as_me:$LINENO: error: Unknown mail method $withval" >&5
+echo "$as_me: error: Unknown mail method $withval" >&2;}
+ { (exit 1); exit 1; }; }
+fi
+
+{ echo "$as_me:$LINENO: checking I/O multiplexing backends" >&5
+echo $ECHO_N "checking I/O multiplexing backends... $ECHO_C" >&6; }
+IOMUXES=""
+
+if test "x$ac_cv_func_select" = xyes ; then
+
+cat >>confdefs.h <<\_ACEOF
+#define WITH_IOSET_SELECT 1
+_ACEOF
+
+ MODULE_OBJS="$MODULE_OBJS ioset-select.\$(OBJEXT)"
+ IOMUXES="$IOMUXES select"
+fi
+
+
+# Check whether --with-epoll was given.
+if test "${with_epoll+set}" = set; then
+ withval=$with_epoll;
+else
+ withval="$ac_cv_func_epoll_create"
+fi
+
+if test "x$withval" = xyes ; then
+
+cat >>confdefs.h <<\_ACEOF
+#define WITH_IOSET_EPOLL 1
+_ACEOF
+
+ MODULE_OBJS="$MODULE_OBJS ioset-epoll.\$(OBJEXT)"
+ IOMUXES="$IOMUXES epoll"
+fi
+
+
+# Check whether --with-kevent was given.
+if test "${with_kevent+set}" = set; then
+ withval=$with_kevent;
+else
+ withval="$ac_cv_func_kevent"
+fi
+
+if test "x$withval" = xyes ; then
+
+cat >>confdefs.h <<\_ACEOF
+#define WITH_IOSET_KEVENT 1
+_ACEOF
+
+ MODULE_OBJS="$MODULE_OBJS ioset-kevent.\$(OBJEXT)"
+ IOMUXES="$IOMUXES kevent"
+fi
+
+IOMUXES=`echo $IOMUXES | sed 's/^ +//'`
+{ echo "$as_me:$LINENO: result: $IOMUXES" >&5
+echo "${ECHO_T}$IOMUXES" >&6; }
+if test "x$IOMUXES" = "x" ; then
+ { { echo "$as_me:$LINENO: error: No supported I/O multiplexing backend found" >&5
+echo "$as_me: error: No supported I/O multiplexing backend found" >&2;}
+ { (exit 1); exit 1; }; }
+else
+ { echo "$as_me:$LINENO: result: $IOMUXES" >&5
+echo "${ECHO_T}$IOMUXES" >&6; }
+fi
+