subdirmk: warning (local+global): saw both NOWARN1 and &NOWARN1
saw NOWARN1 at ./sub/dir/Dir.sd.mk:21
saw &NOWARN1 at ./Dir.sd.mk:14
+ expectedly saw NOWARN1 at ./Dir.sd.mk:14
subdirmk: warning (local+global): saw both WARN and &WARN
saw WARN at ./Dir.sd.mk:6
saw WARN at ./Dir.sd.mk:9
saw &WARN at ./Dir.sd.mk:11
saw &WARN at ./sub/dir/Dir.sd.mk:15
saw &WARN at ./sub/dir/Dir.sd.mk:24
+ expectedly saw &WARN at ./sub/dir/Dir.sd.mk:18
subdirmk: warning (unknown-warning): ./sub/dir/Dir.sd.mk:3: attempt to suppress unknown warning(s) `some-unknown-warning'