It is based on ancient bsd.prefs.mk and not works as expected for SUA,
because all SUA (5.2, 6.0 and 6.1) have libc.so.5.2 (and also old version).
Moreover shlibname base OS version was introduced to speed up to avoid invoking
`uname', but in this script, `uname' always will be invoked.
This is a dummy-package which is made a dependence for packages which are
tightly bound to a specific version of an operating system, e.g. LKMs or
sysutils/lsof. Such binary packages are not backwards compatible with other
versions of the OS.
The version number of this package should be similar to the operating system
version (`uname -r' output).