hard links in llvm39 and binutils

[john at TheUsGroup.com]

Both llvm39 and binutils failed to install recently because they both have
hard links that cross directories. On this machine, those directories, both
in /usr/local on on different zfs filesystems.

I've had this directory structure for several years without issue, so this use
of hard links is new.

Is this use of hard links something I should expect to see looking forward or
is it an error?

John Theus
TheUs Group