1 make: "var-op-shell.mk" line 28: warning: "echo "failed"; false" returned non-zero status 2 make: "var-op-shell.mk" line 34: warning: "false" returned non-zero status 3 make: "var-op-shell.mk" line 59: warning: "kill -14 $$" exited on a signal 4 /bin/no/such/command: not found 5 make: "var-op-shell.mk" line 65: warning: "/bin/no/such/command" returned non-zero status 6 stderr 7 exit status 0 8