Cannot Mix C Code

[slavik262]

But if you compile everything as C++, the symbols should match up and the linker should have no problem. I'd focus on just getting it to compile as C++. I don't know why this should be too much of a problem. If it's some some stupid persistent project setting that you can't change or something, try copying the code into new .cpp files.

[Jared Russell]

Originally Posted by slavik262

But if you compile everything as C++, the symbols should match up and the linker should have no problem. I'd focus on just getting it to compile as C++. I don't know why this should be too much of a problem. If it's some some stupid persistent project setting that you can't change or something, try copying the code into new .cpp files.

It seems that this is the simplest solution to this problem. Usually, the C/C++ mixing nastiness is only an issue if you are using a large C code base and/or pre-compiled C library that you want to link with in a C++ application. Since it seems like there is only a single C-style function, just rename it to .cpp and the compiler will compile it as C++.

As to what the problem may be with your current extern "C" way, what is a "scheme *" type defined as? Is it a C type or a C++ class? Consult this FAQ for more information.

[nabioullinr]

Thanks! It works now.
I did not recognize at first that the source file was compiled separately; I wanted to have .c in order to convey the fact that it is a C source file, rather than a C++ class.

[nabioullinr]

I'm now facing the same issue, but this time I cannot merely rename the source file to .cpp because it contains numerous implicit type conversions which are considered errors in C++. Manual typecasting will probably take a week. Maybe I should try calling from inline asm to avoid name mangling issues, or simply rename the C functions to the mangled name...not elegant but this might work.

[jhersh]

Or just put the header include inside an extern "C".

[nabioullinr]

That only works when the file has the extension .cpp (i.e., is compiled as C++).

[jhersh]

Originally Posted by nabioullinr

That only works when the file has the extension .cpp (i.e., is compiled as C++).

Exactly... so when you are including the C header file in a .cpp file, you include the header as extern "C".