Getting XCode to include, compile and link existing (C++) codebase in XCode 4.3(.1)

Question

I'm trying to 'import' my existing C++ codebase into my XCode iOS project.

Problem is, xCode won't compile (and therefore not link) my code. This is what I've done so far:

• File > Add files to "Project". I don't tick 'Copy files' since it's a shared codebase for multiple platforms and multiple copies of source code is not an option.
• I've added appropriate path to the "Header Search Path" project settings. Including header files works, I can #include "stuff.h" from my Objective-C++ (.mm) file.

However, I can't find any way of actually telling XCode to compile the .cpp files?

A few points:

• I'm not looking for a way to pre compile it into a library and linking that way
• The project is a standard iOS Objective-C project. The C++ code is called from it (that's not a problem)

Update

I've added the codebase directory to the target's "Compile Sources". I actually have to click "Add other..." in the dialog that pops up, since I can't select the directory reference to my codebase.

When I add it, XCode asks me if I want to "Create external build system project". I leave it ticked and the two fields with the default values "/usr/bin/make" and "$(ACTION)". However, my codebase doesn't get compiled during the build. Do I have to write my own Makefile ?

If I don't select "Create external build system project" then a directory reference is created under the target, but not compiled during the build and a warning is emitted:

warning: no rule to process file '$(PROJECT_DIR)/../codebase'
of type folder for architecture i386

Answer 1

Even if you don't check Copy Files you have to check Add to Targets when adding the files to the project.

If you forgot to do that, you can select the target, go to the Build Phases tab and add the files to Compile Sources.