c++ - 错误 LNK2019 : unresolved external symbol _soap_ssl_init

Question

我正在使用 gsoap 调用 wcf 网络服务。我的要求是我必须使用 ssl 协议(protocol)来保护通信。我读了an article作为我的 ssl 配置引用。

但在编译时出现以下错误:

Error 1 error LNK2019: unresolved external symbol _soap_ssl_init referenced in function "public: int __thiscall LogServicesFacade::SendFileToServer(char const *)" (?SendFileToServer@LogServicesFacade@@QAEHPBD@Z) E:\Path\To\My\Solution.Project\LogServicesFacade.obj Solution.Project

这是我的代码:

_ns1__StoreEventFileResponse response;
_ns1__StoreEventFile input;
struct soap *soap = soap_new();

/*if (!sslInitiated)
{*/
    soap_ssl_init();
    //if (soap_ssl_client_context(soap, SOAP_SSL_DEFAULT, NULL, NULL,
        //"C:\\Path\\To\\Certs\\File\\cacerts.pem", NULL, NULL))
    //{
        soap_print_fault(soap, stderr);
    //}
//}

为了简单起见，我评论了一些其他 ssl 函数以减少错误。

更新 1

值得一提的是，我使用的是 VS 2013。因此我使用 Visual C++ 作为我的编译器。我也看到了 gSOAP ssl document .作者说我必须向编译器添加选项 DWITH_OPENSSL。如何将它添加到 VC 编译器中？

Answer 1

如 code project article说，我使用以下步骤减轻了错误:

• Right click on the project and select Properties from the right click menu. Under Configuration Properties, C/C++ and General, add include paths to gSOAP and Open SSL. Click Apply.

• Under Configuration Properties, C/C++ and Preprocessor, add “WITH_OPENSSL” (to enable SSL in gSOAP) and “DEBUG” (to enable logging) to the list of Preprocessor Definitions. Click Apply.

• Under Configuration Properties, Linker and General, add the path to the Open SSL binary directory, where the compiled lib files reside, to Additional Library Directories. Click Apply.

• Under Configuration Properties, Linker and Input, add “libeay32.lib” and “ssleay32.lib” to Additional Dependencies. These
  are the Open SSL libraries. Click Apply.