+# check for jansson library
+jansson=0
+AC_CHECK_HEADER([jansson.h],jansson=1)
+AM_CONDITIONAL(HAVE_JANSSON, [test "$jansson" = 1])
+if test "x$jansson" = x1
+then
+ AC_DEFINE([HAVE_JANSSON],[1],[Have jansson library])
+else
+ AC_DEFINE([HAVE_JANSSON],[0],[Lacking jansson library])
+fi