subdirmk: warning (single-char-var): ./Dir.sd.mk:8: possibly confusing unbracketed single-char $-expansion
subdirmk: warning (local+global): saw both WARN and &WARN
saw WARN at ./Dir.sd.mk:6
subdirmk: warning (single-char-var): ./Dir.sd.mk:8: possibly confusing unbracketed single-char $-expansion
subdirmk: warning (local+global): saw both WARN and &WARN
saw WARN at ./Dir.sd.mk:6