I don't know where to start but apparently cmake, or something related to cmake with respect to Trinity, or pkgconfig, is broken on my Slackware 13.1 build environment. ...
Looks like "airing out" in public has already helped some. :)
I just discovered that when I manually populate the internal variable TQT_INCLUDE_DIRS=/usr/include/tqt;${QTDIR}/include between the cmake configure and make, I no longer need the sym link.
Progress? :)
The problem now seems narrowed to one point: to discover why the TQT_INCLUDE_DIRS internal variable does not automatically populate.
Question: what is the correct value for that internal variable?
Darrell