Re: Problem with Objective-C++ Header Files

On 8 Jan 2010, at 08:23, Stephen Furlani wrote:

> I have an extensive library of C++ code that I want to be able to
> incorporate into my Objective-C project.  Following the tutorials provided
> by Apple and others, I've renamed my object file to .mm to utilize
> Objective-C++.
> 
> If I include the header files from my C++ library, I get a swath of errors,
> namely surrounding the use of 'id' in the subsequent included C++ header
> files.  I also get some more serious errors in the incompatibility between
> X.h (from XFree86) and objc.h over the use of 'BOOL' and 'cursors'.

I've got a fair amount of Objective-C++ code and haven't run into this, so I think you may need to give a more specific example.

(I usually run into the opposite problem, I've got a C++ file inadvertently included in an Objective-C source, and I have to rename it from .m to .mm.)

> Renaming the object file back to .cpp, the project compiles without error,
> so I know it's because of the inclusion of the Objective-C keywords.
> 
> How can I tell XCode to include those headers strictly as C++ headers and
> not Objective-C headers?  I thought using #include instead of #import would
> be clear enough.


That's a reasonable guideline, but #import is effectively just a free #pragma once.

David Dunham     Creator of Jigami, a unique game 
for iPhone/iPod touch  http://a-sharp.com/jigami/