Hi,

I am working on calling object pascal functions from c/c++. I notice that when a unit is compiled into object code, the name of a function is altered in this convention:

<unit name>_<function name>$$<return type>

for example, if i have this unit:

unit wrapper;
interface
function test(): integer; stdcall;
implementation
function test(); integer; stdcall;
begin
    result := 3;
end;
end.

when the unit described above is compiled, its name changed to "WRAPPER_TEST$$SMALLINT",
not just test like c/c++ expects at link time. Is there a way perhaps through fpc compiler setting or using object pascal identifier to avoid object pascal name mangling like this?

Please help.

thank you.

Toan

http://www.freepascal.org/docs-html/prog/progsu126.html Here you go. Watch out for name clash. FPC uses that convention for operator overloading and symbol namespacing.

Sorry, I mean just overloading. both operator and function/procedure applies.

I just find out the solution.
To make sure that fpc does not change function names after compilation, one has to add 'export' identifier to such functions. This would be the solution to the above example.

function test(): integer; stdcall; export;

I tested and it linked fine. One can also use the alias identifier to be able to have a new function name references FPC function.