Hi Ralf! I just figured I would like to make a new release of CLN. I then realized that setting version numbers has always been confusing me. Until now, I've never cared as much about this as I should, but this should some day get clarified. The configure.ac file in CLN says: dnl * increment CL_REVISION, dnl * if any functions/classes have been added, removed or changed, dnl increment CL_CURRENT and set CL_REVISION to 0, dnl * if any functions/classes have been added, increment CL_AGE, dnl * if backwards compatibility has been broken, set CL_AGE to 0. dnl $(CL_CURRENT):$(CL_REVISION):$(CL_AGE) results in dnl libcln.so.$(CL_CURRENT)-$(CL_AGE) Okay, let's see. I've fixed a function that used to segfault and I've added support for a platform that was not supported before. I increment CL_REVISION. Have I added, removed ro changed a function or class? I'm not sure. Interface-wise not. But I've changed functionality (it doesn't crash any more). So I increment CL_CURRENT to 7 and set CL_REVISION to 0. I haven't added functions/classes, so I don't touch CL_AGE. And I haven't broken backwards compatibility, so I leave CL_AGE at 0. This results in libcln.so.7.0.0, which is clearly bogus, since the new version is a drop-in replacement for the old one! So, back to the second item: Maybe I shoudn't have incremented CL_CURRENT. Then, CL_REVISION is still 0. I haven't added functions/classes, so CL_AGE remains at 0, and I haven't broken backwards compatibility. Oops, then all version numbers remain the same. This is bogus, too! The confugure.ac file in GiNaC is slightly less ambiguous: dnl When making releases, do dnl 1. Increment ginac_lt_revision dnl 2. If any interfaces have been added, removed, or changed since the dnl last release, increment ginac_lt_current and set dnl ginac_lt_revision to 0. dnl 3. If any interfaces have been removed since the last release, set dnl ginac_lt_age to 0. Let's see what happens when I apply this to the new CLN release. This is more clear, since it refers to "interfaces" as opposed to "functions/classes". So I end up with REVISION=1, CURRENT=6 (as before), and AGE=0. This looks better and results in libcln.so.6.0.1. But is this correct? AGE is never incremented! Can you suggest better texts for configure.ac, so making new releases becomes painless? I shamefully have to admit that reading the libtool documentation did not really enlighten me. Regards -richy. -- Richard B. Kreckel <http://www.ginac.de/~kreckel/>