+dnl the official version number is
+dnl a.b.c
+AC_INIT([rrdtool],[1.2.9])
+dnl for testing a numberical version number comes handy
+dnl the released version are
+dnl a.bccc
+dnl the devl versions will be something like
+dnl a.b999yymmddhh
+NUMVERS=1.2009
+AC_SUBST(NUMVERS)