make: "varshell.mk" line 5: warning: "/bin/no/such/command 2> /dev/null" returned non-zero status make: "varshell.mk" line 8: warning: "false" returned non-zero status make: "varshell.mk" line 9: warning: "echo "output before the error"; false" returned non-zero status EXEC_FAILED='' TERMINATED_BY_SIGNAL='' ERROR_NO_OUTPUT='' ERROR_WITH_OUTPUT='output before the error' NO_ERROR_NO_OUTPUT='' NO_ERROR_WITH_OUTPUT='this is good' exit status 0