around at either build-time or at run-time is:
USE_TOOLS+= perl # build-time
USE_TOOLS+= perl:run # run-time
Also remove some places where perl5/buildlink3.mk was being included
by a package Makefile, but all that the package wanted was the Perl
executable.
p4pr produces a file from the Perforce depot with each line annotated
with the change, revision, and branch from which it came. It takes
its time, but the output is invaluable.