Recently the devel/icu Port was updated on my system. When running an app that depends on the libtracker-sparql-1.0.so.0 shared library from the sysutils/tracker port it complains that it cannot find and older version of a shared library provided by devel/icu:
Shared object "libicui18n.so.53" not found, required by "libtracker-sparql-1.0.so.0"
I believe this means that sysutils/tracker should have been rebuilt along with devel/icu but was not.
$ uname -a
FreeBSD AntumD_FreeBSD 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274401: Tue Nov 11 21:02:49 UTC 2014 email@example.com:/usr/obj/usr/src/sys/GENERIC amd64
$ pkg info tracker
Name : tracker
Version : 1.2.6_1
Installed on : Wed May 13 14:17:39 PDT 2015
$ pkg info icu
Name : icu
Version : 55.1
Installed on : Thu Jul 16 03:34:58 PDT 2015
I have not yet attempted to rebuild sysutils/tracker, but am about to do so and will comment again to confirm that rebuilding fixes the problem.
Rebuilding sysutils/tracker fixed the problem.
I suppose it is possible that I made an error myself that caused the dependency to not be rebuilt. But, I do not have the log of the build nor any other information, so I don't think there is any way to know for sure unless others have the same issue.