error LNK2019: unresolved external symbol _soap_ssl_init

Question

I am using gsoap for calling a wcf webservice. My requirement say I must use ssl protocol to secure communication. I read an article as my reference for ssl configuration.

But in compiling I get following error:

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

Here is my code:

_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);
    //}
//}

I comment some another ssl function to reducing errors for simplicity.

Update 1

It is worth to mention that I use VS 2013. So I use Visual C++ as my compiler. Also I saw gSOAP ssl document. The author said I must add Option DWITH_OPENSSL to compiler. How I can add this to VC compiler?

I am new to c++. How I can find library of this function so I can link to that? — Seyed Morteza Mousavi, Sep 18 '15 at 06:43
And regarding `DWITH_OPENSSL`, I'm sure that the author actually said `-DWITH_OPENSSL`, where `-D` is the common preprocessor flag (used by e.g. GCC and Clang) to defined a macro, which means it defines the macro `WITH_OPENSSL`. You can add that in the project settings preprocessor tab. — Some programmer dude, Sep 18 '15 at 06:44
@JoachimPileborg a user at http://stackoverflow.com/questions/6316007/how-to-use-ssl-in-c-gsoap-generated-classes said that i use file name 'ligsoapssl++.a'. I didn't a file this name in root of gsoap directory. — Seyed Morteza Mousavi, Sep 18 '15 at 06:52
Files starting with `lib` and ending in `.a` is a static library in POSIX environments (like Linux or Mac OSX). Your library should be named *something* like `gsoapssl++.lib`. — Some programmer dude, Sep 18 '15 at 06:55
@JoachimPileborg thanks for your help. http://www.codeproject.com/Articles/30497/Creating-a-gSoap-eBay-Client-Application-with-Visu said how to link to gsoap. — Seyed Morteza Mousavi, Sep 18 '15 at 07:08

score 1 · Answer 1 · answered Sep 18 '15 at 07:18

As in code project article said, I mitigated errors using following steps:

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.

error LNK2019: unresolved external symbol _soap_ssl_init

1 Answers1