我创建了由名称的库libfastget这是在src我的程序作为

src
|-libfastget
|  |-libfastget.go
|
|-MainProgram
   |-main.go

并libfastget输出fastget如下功能

package libfastget

import (
    "fmt"
    "io"

)


func fastget(urlPtr *string, nPtr *int, outFilePtr *string) download {
    .....
    return dl

}

当我在主程序中使用库时

package main

import (
    "fmt"
    "net/http"
    "os"
    "libfastget"
    "path/filepath"
    "strings"
    "flag"
    "time"

)
func uploadFunc(w http.ResponseWriter, r *http.Request) {

         n:=libfastget.fastget(url,4,filename)

    }

}

尝试使用构建时出现以下错误 go build

# FServe
./main.go:94: cannot refer to unexported name libfastget.fastget
./main.go:94: undefined: libfastget.fastget

奇怪的是，库文件libfastget.a位于pkg文件夹中。