WARN: Makefile: possible use of absolute pathname "/usr/bin/xxx"

From: Nuno Teixeira <eduardo_at_freebsd.org>
Date: Sun, 12 Jun 2022 14:42:24 UTC
Hello,

I'm trying to find a variable to silince portlint warning like, e.g.:
WARN: Makefile: possible use of absolute pathname "/usr/bin/clang