I just remembered that swig-py3 brings a new dependency: py3c. The 1.14 release notes, under "Support for Python 3.x," should document the new dependency. I think it should be in a yellow note box:
[[[ New Dependency: py3c Subversion's support for Python 3.x SWIG bindings introduces a new optional dependency on the Python 3 Compatibility layer for C extensions (py3c). You need py3c if: ... You don't need py3c if: ... See the INSTALL file for a complete list of Subversion's dependencies. ]]] And now we go down the rabbit hole of "under exactly what circumstances do I or don't I need py3c?" :-) Once this is sorted out, I'd like to put the same information in the INSTALL file. Oh, and I'd make "Python 3 Compatibility layer for C extensions (py3c)" a hyperlink. Which begs the question: What is the canonical link? Nathan