Re: name mangling problem
On 2008-07-23 06:35:00 -0400, Jaco Naude <naude.jaco@gmail.com> said:
I am running into a problem where I am trying to import C DLL into a
Visual C++ 2008 application. The functions in the C DLL are obviously
not name mangled (verified using Dependency Walker).
Last time I looked, VC++ did mangle names when compiling C code. It
sticks an underscore on the front.
When I try to use
any of the functions from the DLL, VC++ mangles these names
Well, it mangles them differently from the way they're mangled when
they're compiled as C code.
(or so it
looks like) and complains that it can't link to mangled versions of
the function names. To avoid this I've figured that I need to declare
the functions I would like to use from the DLL as follows:
extern "C"
{
void Py_Initialize(void);
}
Is there any easier way of doing this than to declare all the
functions in the DLL using extern "C"?
No, that's what extern "C" is for.
Note that this problem really has nothing to do with the use of DLLs,
except that that's where you happened to notice it. It comes up
whenever you need to link C code with C++ code. You have to tell the
compiler that those things were compiled as C so that it can generate
code with the correct calling convention (which can include more than
just changing how the names are mangled).
--
Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)