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以下是示例代码部分来自http://curl.haxx.se/libcurl/c/sendrecv.html工作：堆栈select（）函数没有在Visual Studio
static int wait_on_socket(curl_socket_t sockfd, int for_recv, long timeout_ms)
{
struct timeval tv;
fd_set infd, outfd, errfd;
int res;
tv.tv_sec = timeout_ms/1000;
tv.tv_usec= (timeout_ms % 1000) * 1000;
FD_ZERO(&infd);
FD_ZERO(&outfd);
FD_ZERO(&errfd);
FD_SET(sockfd, &errfd); /* always check for error */
if(for_recv)
{
FD_SET(sockfd, &infd);
}
else
{
FD_SET(sockfd, &outfd);
}
///* select() returns the number of signalled sockets or -1 */
res = select(sockfd + 1, &infd, &outfd, &errfd, &tv);
return res;
}
它好工作在Linux上，但是当我把它在Visual Studio 2010中，它抱怨select（）函数。我正确地编译和链接了所有的cURL库/ DLL，甚至我还以http请求的形式下载了一些东西。
但是，当我尝试使用套接字select（）函数，它抱怨，出现以下错误：
error LNK2028: unresolved token (0A00034C) "extern "C" int __stdcall select(int,struct fd_set *,struct fd_set *,struct fd_set *,struct timeval const *)" ([email protected]@[email protected]@[email protected]@@Z) referenced in function "int __cdecl `anonymous namespace'::wait_on_socket(unsigned int,int,long)" ([email protected][email protected]@[email protected])
error LNK2019: unresolved external symbol "extern "C" int __stdcall select(int,struct fd_set *,struct fd_set *,struct fd_set *,struct timeval const *)" ([email protected]@[email protected]@[email protected]@@Z) referenced in function "int __cdecl `anonymous namespace'::wait_on_socket(unsigned int,int,long)" ([email protected][email protected]@[email protected])
而且，似乎select（）函数与Windows兼容： http://msdn.microsoft.com/en-us/library/ms740141(VS.85).aspx
我错过了什么吗？有人能告诉我如何解决这个问题吗？
谢谢，--Rudy