Under Buster I had similar errors on compiling OpenSCAD as the FreeCAD errors.
Coin3D emerged ok on Gentoo64.
Just wondering if it might be a 32/64bit issue?
Not sure if FreeCAD runs on Gentoo x86 32bit?
Are there any 32bit Linux's around for x86?
No ebuild for Arm8 version, so it must be done the hard way
Is there a way to test coin3d without FreeCAD?emerge: there are no ebuilds to satisfy "freecad".