On Wed, Jan 18, 2017 at 6:55 PM, Cholerae Hu <cholerae...@gmail.com> wrote:
> I'm trying to play with go:linkname, and I wrote a demo for this.
>
> directory structure:
>
> [test]$ tree
> .
> ├── main.go
> ├── pri
> │ └── a.go
> └── pub
> ├── issue15006.s
> └── b.go
>
> a.go:
>
> package pri
>
>
> import (
> "fmt"
> )
> func rua() int64 {
> fmt.Println("rua in pri")
> return 1
> }
>
> b.go:
>
> package pub
>
>
> import (
> "unsafe"
> )
>
>
> var _ = unsafe.Sizeof(0)
>
>
> //go:noescape
> //go:linkname rua test/pri.rua
> func rua() int64
>
>
> func Rua() int64 {
> return rua()
> }
>
> main.go:
>
> package main
>
>
> import (
> "test/pub"
> )
>
>
> func main() {
> println(pub.Rua())
> }
>
> issue15006.s is a workaround for issue 15006 and it's totally empty.
>
> Than I ran `go run main.go` and got an error:
>
> # command-line-arguments
> test/pub.Rua: test/pri.rua: not defined
> test/pub.Rua: undefined: test/pri.rua
>
> So what's wrong with this demo?
Nothing in your program imports test/pri. go:linkname only changes
the name used for a symbol. It doesn't cause a package to be
imported.
Ian
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