Howto use on bcc32 an static lib built with bcc32c

I need to use a C++11 library on a bcc32 project. The library doesn't compile with bcc32, but does with bcc32c.

I would like to prevent exposing this library on a DLL. The project compiles with bcc32c, but I wasn't able to use bcc32c static libs on bcc32 projects.