我正在嘗試在 go-lang 中使用共享庫，我正在關注這篇博文：http : //blog.ralch.com/tutorial/golang-sharing-libraries/但是當我點擊構建時，我得到一個錯誤：simo@simo:~/gopath$ go build -linkshared -o app effe/provasrc/effe/prova/prova.go:3:8: cannot find package "libmath" in any of:/usr/local/go/src/libmath (from $GOROOT)/home/simo/gopath/src/libmath (from $GOPATH)我是新手，所以我也會展示我的環境......simo@simo:~/gopath$ pwd/home/simo/gopathsimo@simo:~/gopath$ echo $GOPATH/home/simo/gopathsimo@simo:~/gopath$ tree.├── pkg│   └── linux_amd64_dynlink│       ├── effe│       │   ├── libmath.a│       │   └── libmath.shlibname│       └── libeffe-libmath.so└── src    └── effe        ├── libmath        │   └── libmath.go        └── prova            └── prova.go7 directories, 5 filessimo@simo:~/gopath$ cat src/effe/libmath/libmath.go // filename: libmath.gopackage libmathfunc Sum(x, y int) int {    return x + y}simo@simo:~/gopath$ cat src/effe/prova/prova.go package mainimport "libmath"import "fmt"func main() {    fmt.Printf("5 op 10 => %d", libmath.Sum(5, 10))}simo@simo:~/gopath$ go install -buildmode=shared -linkshared effe/libmathsimo@simo:~/gopath$ go build -linkshared -o app effe/provasrc/effe/prova/prova.go:3:8: cannot find package "libmath" in any of:    /usr/local/go/src/libmath (from $GOROOT)    /home/simo/gopath/src/libmath (from $GOPATH)我究竟做錯了什么 ？