shobjidl.h 中的第二个 C 链接
我目前正在将一个 C++ 项目从 VS6 移动到 VS2008，但是 shobjidl.h 中的许多函数都遇到以下错误
error C2733: second C linkage of overloaded function 'HWND_UserMarshal' not allowed c:\program files\microsoft sdks\windows\v6.0a\include\shobjidl.h 28830
，不仅 HWND_UserMarshall 受到影响，该标头中的其他函数也受到影响，例如 HWND_UserSize、HWND_UserFree 和 HWND_UserFree64。
我知道当使用一组不同的参数声明 extern“C”函数时会发生此错误，但是这是在 SDK 标头中，我无法更改。
有人对我下一步应该做什么有什么建议吗？
编辑：标题是 Microsoft 标题，顶部包含以下注释
/* this ALWAYS GENERATED file contains the definitions for the interfaces */
/* File created by MIDL compiler version 7.00.0499 */
/* Compiler settings for shobjidl.idl:
Oicf, W1, Zp8, env=Win32 (32b run)
protocol : dce , ms_ext, c_ext, robust
error checks: allocation ref bounds_check enum stub_data
VC __declspec() decoration level:
__declspec(uuid()), __declspec(selectany), __declspec(novtable)
DECLSPEC_UUID(), MIDL_INTERFACE()
*/
//@@MIDL_FILE_HEADING( )
I am currently moving a C++ project from VS6 to VS2008, but I have come accross the following error for many of the functions in shobjidl.h
error C2733: second C linkage of overloaded function 'HWND_UserMarshal' not allowed c:\program files\microsoft sdks\windows\v6.0a\include\shobjidl.h 28830
Not just HWND_UserMarshall is affected, also other functions in this header, such as HWND_UserSize, HWND_UserFree and HWND_UserFree64.
I understand that this error occurs when an extern "C" function is declared with a different set of parameters, however this is in a SDK header, not one that I can change.
Does anyone have any suggestions of what my next steps should be?
EDIT: The header is a Microsoft header and at the top contains the following comments
/* this ALWAYS GENERATED file contains the definitions for the interfaces */
/* File created by MIDL compiler version 7.00.0499 */
/* Compiler settings for shobjidl.idl:
Oicf, W1, Zp8, env=Win32 (32b run)
protocol : dce , ms_ext, c_ext, robust
error checks: allocation ref bounds_check enum stub_data
VC __declspec() decoration level:
__declspec(uuid()), __declspec(selectany), __declspec(novtable)
DECLSPEC_UUID(), MIDL_INTERFACE()
*/
//@@MIDL_FILE_HEADING( )
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不幸的是，我不熟悉这个标题或这些函数。但是，我怀疑 C 宏旨在根据预处理器定义来控制哪些函数对您可见。我怀疑您以某种方式定义（或未定义）预处理器符号，从而获得重复的函数定义。
由于不熟悉标题，我无法真正推荐如何才能获得您想要的功能。我可能会首先阅读文档，查看类似产品的配置，然后阅读头文件本身。
Unfortunately, I'm not familiar with this header or these functions. However, I suspect that there are C macros meant to control which functions are visible to you based on preprocessor defines. And I suspect that you somehow have defined (or not defined) preprocessor symbols in a way that you're getting duplicate function definitions.
Not being familiar with the header, I can't really recommend what to do to get just the functions you want. I would probably start by reading the documentation, looking at the configuration for similar products, and reading the header file itself.
这些标头是从 IDL 文件生成的吗？如果是这样，您可能需要使用 VS2008 兼容工具重新生成它们。
例如，如果您使用 TAO ORB，您将下载最新版本（或 2008 版本）并运行该工具：
使用适当的标志和路径。
编辑：从您的更新来看，您似乎确实应该生成此文件。 MIDL 是 Microsoft IDL 编译器。检查 MSDN 上的文档以获取有关编译器的信息： http://msdn.microsoft.com/en-us/library/windows/desktop/aa367300%28v=vs.85%29.aspx
Are those headers generated from an IDL file? If so you probably need to re-generated them using a VS2008 compliant tool.
For example if you are using the TAO ORB you would download the latest version (or the 2008 version) and run the tool:
Using appropriate flags and paths.
EDIT: From your update it does seem like you are meant to generate this file. MIDL is the Microsoft IDL compiler. Check the docs on MSDN for info on the compiler: http://msdn.microsoft.com/en-us/library/windows/desktop/aa367300%28v=vs.85%29.aspx