＆＃34; go build＆＃34;在golang中不生成文件

Question

我使用go build生成文件。但我只能生成main，这意味着go build main.go有效，而go build dao.go无法生成任何内容？

如何生成dao？

Answer 1

来自go help build：

When the command line specifies a single main package,
build writes the resulting executable to output.
Otherwise build compiles the packages but discards the results,
serving only as a check that the packages can be built.