1 subdirmk: warning: ./Dir.sd.mk:8: possibly confusing unbracketed single-char $-expansion
2 subdirmk: warning: saw both WARN and &WARN
3 saw WARN at ./Dir.sd.mk:6
4 saw WARN at ./Dir.sd.mk:9
5 saw &WARN at ./Dir.sd.mk:7
6 saw &WARN at ./Dir.sd.mk:10
7 saw &WARN at ./Dir.sd.mk:11