6.7. Libtool Library Versioning

In the flag mylibrary_LDFLAGS one should specify an option like that: -version-info [CURRENT]:[REVISION]:[AGE].
[CURRENT] is the most recent version of the library that the library supports.
[REVISION] is the implementation number of the current interface (i.e: patch releases)
[AGE] is the number of versions back that this version is still backwards compatible with.