Question

看起来这个例子不会变得更简单：

   __declspec(dllimport) void HelloWorld()
    {
    }

那么，我遇到了什么问题？好的，当试图按原样编译时，就是在VS中创建dll类型项目之后，我收到警告：
警告C4273：'HelloWorld'：dll链接不一致
如果我将cpp文件中HelloWorld的定义更改为：

__declspec(dllexport) void HelloWorld()
{

}

我收到错误：

错误C2491'HelloWorld'：不允许定义dllimport功能
另一方面，如果我将HelloWorld的定义更改为：

AsyncConfigurer

我收到警告：

警告C4273'HelloWorld'：dll链接不一致
知道如何定义它所以它编译没有任何警告？我的意思是，这些警告至少令人担忧。

Answer 1

在包含标题之前，您需要定义package main import ( // Standard library packages "fmt" "strconv" "log" "net" "net/http" // Third party packages "github.com/julienschmidt/httprouter" "github.com/skratchdot/open-golang/open" ) // https://blog.golang.org/context/userip/userip.go func getIP(w http.ResponseWriter, req *http.Request, _ httprouter.Params){ fmt.Fprintf(w, "<h1>static file server</h1><p><a href='./static'>folder</p></a>") ip, port, err := net.SplitHostPort(req.RemoteAddr) if err != nil { //return nil, fmt.Errorf("userip: %q is not IP:port", req.RemoteAddr) fmt.Fprintf(w, "userip: %q is not IP:port", req.RemoteAddr) } userIP := net.ParseIP(ip) if userIP == nil { //return nil, fmt.Errorf("userip: %q is not IP:port", req.RemoteAddr) fmt.Fprintf(w, "userip: %q is not IP:port", req.RemoteAddr) return } // This will only be defined when site is accessed via non-anonymous proxy // and takes precedence over RemoteAddr // Header.Get is case-insensitive forward := req.Header.Get("X-Forwarded-For") fmt.Fprintf(w, "<p>IP: %s</p>", ip) fmt.Fprintf(w, "<p>Port: %s</p>", port) fmt.Fprintf(w, "<p>Forwarded for: %s</p>", forward) } func main() { myport := strconv.Itoa(10002); // Instantiate a new router r := httprouter.New() r.GET("/ip", getIP) // Add a handler on /test r.GET("/test", func(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { // Simply write some test data for now fmt.Fprint(w, "Welcome!\n") }) l, err := net.Listen("tcp", "localhost:" + myport) if err != nil { log.Fatal(err) } // The browser can connect now because the listening socket is open. //err = open.Start("http://localhost:"+ myport + "/test") err = open.Start("http://localhost:"+ myport + "/ip") if err != nil { log.Println(err) } // Start the blocking server loop. log.Fatal(http.Serve(l, r)) } 。这样，标题可以根据您是导入还是导出来声明正确的原型。

如果不这样做，它将导入不是你想要的东西

在Visual Studio 2015中创建DLL库

1 个答案: