Both dev-python/python-fchksum-1.7.1 and app-arch/cfv-1.16 build and install on macos. I tested cfv (which uses the python module) and it appears to work fine.
Confirmed dev-python/python-fchksum-1.7.1 building and installing fine here also.
Fixed in CVS
*** Bug 58412 has been marked as a duplicate of this bug. ***
Closing out bugs that've been resolved for a while now...