If the objdump is giving you a bare name, then the function is not a C++ function. For C++ functions, objdump will either report the mangled name (which would be obvious), or if you pass the -C option, it will demangle the name. In either case, it would not look like a bare name.
Originally Posted by Angus
So, it looks like this library is exporting functions with C linkage. You will need to prototype them appropriately with extern "C". If the include files which come with the library don't already do this (and it seems like they don't), you'll have to do it yourself:
If you are not using C++ at all, then I'm not sure what's happening. I'd need to see the output from objdump, and the code you are using to try to call the function.
EDIT: objdump is not capable of telling you the parameter types or other properties of a function, because the object file format does not support that. It can do it in the case of C++ because this data is mangled directly into the name, but if this is a C library, what you see is what you get.