Index: configure.in
===================================================================
--- configure.in	(révision 3772)
+++ configure.in	(copie de travail)
@@ -1056,6 +1056,19 @@
 fi
 AM_CONDITIONAL(WITH_UDEV, test -n "${udevdir}")
 
+dnl Check for date support of "+%s"
+AC_MSG_CHECKING(if date supports +%s)
+DATE_S_TEST="`date +%s`"
+if test "${DATE_S_TEST}" != "%s"; then
+	have_date_s=yes
+else
+	have_date_s=no
+fi
+AC_MSG_RESULT([${have_date_s}])
+if test "${have_date_s}" = "yes"; then
+	AC_DEFINE(HAVE_DATE_S, 1, [Define if date supports '%s' format])
+fi
+
 AC_PATH_PROGS([ASCIIDOC], [asciidoc], [none])
 AM_CONDITIONAL([MANUALUPDATE], [test "x$ASCIIDOC" != "xnone"])
 AC_PATH_PROGS([A2X], [a2x], [none])