Re: DLL build problem - mangling

From:

"Alex Blekhman" <xfkt@oohay.moc>

Newsgroups:

microsoft.public.vc.language

Date:

Tue, 12 Sep 2006 10:46:44 +0300

Message-ID:

<u30$Z#j1GHA.4908@TK2MSFTNGP02.phx.gbl>

<sean.straw@gmail.com> wrote:

Visual Studio .NET 2005 (not building .NET application
though)

Project: run-of-the-mill C language DLL. I have it
producing an import
library.

Release and Debug versions build fine, but when I go to
link the Debug
import library to my project, the darned thing has
bytecount decoration
(not C++ mangling).

The exported function has extern "C"
__declspec(dllexport) - the extern
"C" bit having been added in an attempt to resolve this,
and the
_release_ version links and operates fine (even before the
addition of
extern "C"), but the _debug_ version links with a
different name in the
library, causing the application using the import library
to fail to
link (unresolved symbol).

Obviously you're exporting as __stdcall. Ensure that you
have __cdecl (/Gd switch) as default calling convention for
the project. Alternatively, specify calling convention
explicitly:

extern "C" __declspec(dllexport) int __cdecl foo();