golang main 代码
文件路径：/misc/cgo/testplugin/testdata/issue19534/main.go
/ Copyright 2017 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package main
import "plugin"
func main() {
p, err := plugin.Open("plugin.so")
if err != nil {
panic(err)
}
sym, err := p.Lookup("Foo")
if err != nil {
panic(err)
}
f := sym.(func() int)
if f() != 42 {
panic("expected f() == 42")
}
}