Now that ghemical has an external shared library, could we have some official versioning info spec for the library's interface? The "Versioning" node of the libtool info file goes into great detail about this issue. Practically speaking, though, you just add libghemical_la_LDFLAGS = -version-info 0:0:0 to src/Makefile.am and update various of those three numbers each time you release a new version of the package, depending on what changes were made since the previous release. dan -- Daniel Macks dmacks at netspace.org http://www.netspace.org/~dmacks