AC_PREFIX_DEFAULT("/opt/oping")
 
+# API version
+LIBOPING_MAJOR=`echo $PACKAGE_VERSION | cut -d'.' -f1`
+LIBOPING_MINOR=`echo $PACKAGE_VERSION | cut -d'.' -f2`
+LIBOPING_PATCH=`echo $PACKAGE_VERSION | cut -d'.' -f3`
+AC_SUBST(LIBOPING_MAJOR)
+AC_SUBST(LIBOPING_MINOR)
+AC_SUBST(LIBOPING_PATCH)
+
+# ABI version
+LIBOPING_CURRENT=1
+LIBOPING_REVISION=0
+LIBOPING_AGE=1
+AC_SUBST(LIBOPING_CURRENT)
+AC_SUBST(LIBOPING_REVISION)
+AC_SUBST(LIBOPING_AGE)
+
 #
 # Check for programs/utilities
 #
 
 #   set age to 0. 
 #
 # <http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html>
-liboping_la_LDFLAGS = -version-info 1:0:1
+liboping_la_LDFLAGS = -version-info @LIBOPING_CURRENT@:@LIBOPING_REVISION@:@LIBOPING_AGE@
 if BUILD_WITH_LIBSOCKET
 liboping_la_LDFLAGS += -lsocket
 endif