c - 在 C 项目中包含 libcurl

Question

这是我的第一个 C 程序，我正在使用他们网站上的示例 libcurl 代码:

#include <stdio.h>
#include <curl/curl.h>

int main(void)
{
    CURL *curl;
    CURLcode res;

    curl = curl_easy_init();
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "https://google.com/");

#ifdef SKIP_PEER_VERIFICATION
        /*
         * If you want to connect to a site who isn't using a certificate that is
         * signed by one of the certs in the CA bundle you have, you can skip the
         * verification of the server's certificate. This makes the connection
         * A LOT LESS SECURE.
         *
         * If you have a CA cert for the server stored someplace else than in the
         * default bundle, then the CURLOPT_CAPATH option might come handy for
         * you.
         */ 
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
#endif

#ifdef SKIP_HOSTNAME_VERFICATION
        /*
         * If the site you're connecting to uses a different host name that what
         * they have mentioned in their server certificate's commonName (or
         * subjectAltName) fields, libcurl will refuse to connect. You can skip
         * this check, but this will make the connection less secure.
         */ 
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
#endif

        res = curl_easy_perform(curl);

        /* always cleanup */ 
        curl_easy_cleanup(curl);
    }
    return 0;
}

所以在 xcode 中我创建了一个名为 curl 的“组”并添加了 curl 目录中的所有文件:

现在我收到了这些构建错误:

我做错了什么？任何建议都会有所帮助，谢谢!

Answer 1

Mac OS X 附带了一个 libcurl 副本，因此您的应用程序不需要它自己的副本。

您没有提到您使用的 Xcode 版本。以下适用于 3.2，但在 4 中可能不起作用。

要使用系统提供的 libcurl 版本，请转到 Project，然后 Add To Project。在出现的对话框中，键入 /usr/lib 并按回车键。在文件列表中找到 libcurl.dylib 并单击 Add。