This program is a test plugin demo and can be compiled successfully under Ubuntu.

Please include this self-contained reproducer in the report.

@ALTree
I notice that plugins is only available on Linux in go1.8 release note(https://golang.org/doc/go1.8#plugin).

This means GOOS only support linux?

In my environment, GOOS=linux, but GOHOSTOS=darwin. Does plugins support cross compiling like this?

@xupeilin it’ll be easier to explain once you provide a runnable code sample that others can try to reproduce the issue you are seeing.

source file: test.go

package main

import "C"

type Msger struct{}

func (Msger) Msg() string {
        return "hello, world"
}

I want to compile to test.so.

cgo is by default disabled in cross-compiling. You need to set CGO_ENABLED=1 explicitly.

Also I think you need a cross C compiler targeting Linux (which you probably already have), and set CC to its path.

You need to set CGO_ENABLED=1 explicitly.

This is the reason, and now compiling can start. As @cherrymui said, I still need a cross C compiler to finish compiling...but I don't have.

Thanks guys @ALTree @davecheney @cherrymui .

Change https://golang.org/cl/73870 mentions this issue: font/sfnt: implement font.Face interface