Using old C++ code with Objectice C

[ydedes]

What is the best way to integrate old C++ code with Objective C for iPhone applications?

I am just starting to experiment with the iPhone SDK. I have a large number of C++ classes that I want to port over to the iPhone and I am wondering what is the best way to achieve this?

Thank you...

[vieestchien]

Just import .h files from inside your objective code, then call your C++ functions normally. In your makefile change the compiler from arm-apple-darwin-gcc to arm-apple-darwin-g++. However, iPhone only supports standard C/C++, so sometimes it can't compile your C++ code if it contains advanced functions.

[ajrulez]

Just import .h files from inside your objective code, then call your C++ functions normally. In your makefile change the compiler from arm-apple-darwin-gcc to arm-apple-darwin-g++. However, iPhone only supports standard C/C++, so sometimes it can't compile your C++ code if it contains advanced functions.

Wow..thats good to know So ANSI C++ code will work on iPhone just fine?

[vieestchien]

Yes ANSI C++ would work.
If you write c++ code directly in your Objective-C files, you need to change the extension from .m to .mm.

[NetMage]

I use a custom makefile that compiles .mm in Objective-C++ and .m as regular Objective-C (well with gnu extensions and C-99).

Works very well, and allows some nice C++ stuff to be used (variable declarations, etc.)