We're trying to untangle a hairball of 100's of units, removing some.
It would be helpful if there was tool that would show us what units were explicitly using unit X.
Penganza doesn't seem to have a report that does that. (Although it has lots of other useful reports.)
Can anyone suggest a tool or strategy for doing this, other than just hiding unit x and then hitting F9 ... repeatedly?
MMX (Model Maker Code Explorer) has a nice unit dependency analyzer (it is especially good at detecting cycles).
For more details, see this answer.
--jeroen
I was going to mention Icarus, but when I googled them I got this stack overflow answer, which you might want to check out.
Then again, sometimes I just like to delete my whole Unit Output Directory, then count my new DCU's, and that works too.
The reason you may like Icarus and not GExperts is that it doesn't rely on you to have properly maintained the uses statements in your project file.