I've noticed a few of the regulars have been using OCC 6.9.1 (Jim and Mark, maybe others?). It's been almost a year since I've compiled FreeCAD, so forgive this newbie question: where did you take OCC 6.9.1 from? From what I can see, it hasn't even been merged in the OCE git repo yet.
I guess you downloaded the source code directly from Open Cascade? http://www.opencascade.com/content/latest-release
Is compiling straightforward, are there any specific hurdles compared to OCE?
Fact is, I'm disappointed that the OCE guys trail so far behind OCCT. OCCT 6.9.1 was released back in September, yet the OCE guys released OCE 0.17.1 in January 2016 based on... OCCT 6.8.0 which dates way back from November 2014.
And now, OCCT 7.0.0 Release Candidate is available for download as of 2 days ago! viewtopic.php?f=10&t=14461
The OCE project is being left in the dust, so shouldn't we be considering going back to OCCT for all projects? (official FreeCAD builds and Ubuntu PPA)