VS 2015 - C++ Connector 1.1.8 - needs to have dll-interface (no replies)

I am trying to build the MySQL C++ connector 1.1.8 from src and have made some headway. I am now down to 28 errors and 403 warnings :-/.

Most of the Warnings are like

Warning C4251 'sql::SQLException::sql_state': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'sql::SQLException' test_framework E:\VisualStudio\mysql-connector-c++-1.1.8\cppconn\exception.h 61

And the errors are like

Error C2282 'testsuite::TestCase<testsuite::classes::art_resultset::TestSuiteClass>::~TestCase' cannot override 'testsuite::Test::~Test' test_art_resultset e:\visualstudio\mysql-connector-c++-1.1.8\test\framework\test_case.h

I am guessing something to do with static / dynamic linking but am not sure where to look.

The other thread I have posted today is about trying to compile the example program to use this connector, hence now trying to also recompile the connector itself. The original threads title could have been clearer though.

I have managed to compile the 6.1.9 C Connector with only some warnings (mainly datatype to different datatype risks dataloss).

I have also corrected cmake putting in unquoted c:\program files all over the make files but these errors still persist.

Any help / suggestions ?.