This is not work for error "Go type not supported in export: "

main.go

// file: main.go
package main

import "C"
import (
	"bitbucket.org/binet/go-ffi/pkg/ffi"
	"fmt"
	"net/http"
)

func main() {
	lib, err := ffi.NewLibrary("./libs/profile.so")
	if err != nil {
		panic(err)
	}
	defer lib.Close()

	// I guess I am wrong type specified, but I have no idea for this line...
	fn, err := lib.Fct("Profile", ffi.Void, []ffi.Type{ffi.Void})
	if err != nil {
		panic(err)
	}
	// execute exported function
	h := fn(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, World")
	})
	http.HandleFunc("/", h.Interface().(http.HandlerFunc))
	http.ListenAndServe(":8080", nil)
}

profile.go

// file: plugins/profile/profile.go
// go build -buildmode=c-shared -o ./lib/profile.so ./plugins/profile
package main

import (
	"C"
	"log"
	"net/http"
	"time"
)

//export Profile
func Profile(fn http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		b := time.Now()
		defer log.Printf("elapsed: %v\n", time.Now().Sub(b))
		fn(w, r)
	}
}

func init() {
	log.Println("loaded")
}

func main() {
}

here's my environment

[vagrant@localhost go-plugin-example]$ uname -a
Linux localhost.localdomain 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[vagrant@localhost go-plugin-example]$ go version
go version go1.5.1 linux/amd64
[vagrant@localhost go-plugin-example]$ tree
.
|-- libs
|   |-- profile.h
|   `-- profile.so
|-- main.go
`-- plugins
    `-- profile
        `-- main.go

3 directories, 4 files