`cp -r` is deprecated on BSD/macOS. Use `cp -R` instead.
This step of the build fails on macOS at the moment:
$ make all ... ./make-ca.sh: line 726: c_rehash: command not found cook - ca-certificates stage cook - ca-certificates unstage cp: the -H, -L, and -P options may not be specified with the -r option. ./repo.sh failed.make: *** [build/filesystem.bin] Error 1
According to the man page on macOS,
COMPATIBILITY Historic versions of the cp utility had a -r option. This implementation supports that option; however, its use is strongly discouraged, as it does not correctly copy special files, symbolic links, or fifo's.
The GNU coreutils version supports both
-R identically. From http://man7.org/linux/man-pages/man1/cp.1.html,
-R, -r, --recursive copy directories recursively