This would be really useful in my goal to -O2 or -O3 compile (via poudriere) specific, performance-sensitive packages for a CPUTYPE that is different from the poudriere host machine. I can't set CPUTYPE for all packages, as the build fails right away when pkg won't run on the host machine; this would also be a problem with innumerable other build dependencies. I would, however, like to set CPUTYPE for postgresql13, for example, which AFAIK is never executed as a build dependency. Another possible benefit of an automated, optimized build is openjdk*.

• incorporate avg's feedback about @$FLAVOR in recursive targets

Wrong diff got uploaded.