REF: c & C++

[Derek Coleman <Derek dot Coleman at meluksoft dot co dot uk>]

From: Derek E Coleman M.Eng (Elec & Comp Sci), I.Eng MIIE(elec).

Email  <mailto:Derek.Coleman@meluksoft.co.uk>


Date: Monday 24th July 2000

Hi

I wonder if someone can help me.

My source code project is large.  It consists of old C source files, written
by others  and  new C++ source I wish to link with old C in other files.

My problem follows:
	I have to compile C with -x c and C++ with -x c++. Otherwise the old
code throws up errors. If I try and compile the old code via c++ the, strict
type checking stops the compilation.  Using -x c allows me to compile
sucessfully.

The problem then arises due to the name mangling with c++.  C cant link to
them, one way around this is  use 
	extern "C"{
		some_function_prototype 
	}

but if my function is in a class, the old C functions cant link with it, and
the following produces errors

class some_class{

public:
	extern "C"{
		some_function_prototype 
	}

};

I cant re-write all the old source code, theres loads of it.  

Any ideas?

Regards

Derek