macos - Integrating gcc 4.8 with Xcode 4.x

Question

I am trying to use OpenMP in a objective-c++ program.
Unfortunately llvm-gcc 4.2 seems to have serious bug when working with OpenMP. According to my researches, the best solution should be using gcc 4.8 instead.

I already downloaded a prebuilt version of gcc 4.8. My question is: how can I integrate the new compiler with Xcode, so that I can select it directly in Build Settings from Xcode?
Alternatively, is there an easy way I can compile my project with gcc4.8? I have different files and a .xib, I really do not want to compile all of them by hand.

I'm using MacOS 10.8.3 and Xcode 4.5.1 (though I think the procedure should be the same for all Xcode 4.x).

Answer 1

In Xcode, in your project, select the project (the root of the files, with the blue icon). In the view that opens, select the project again, then select the tab "Build Settings".

Search here the entry "Compiler for C/C++/Objective-C (there is a search box above the table view). Edit the value and set a custom path (by selecting "Other…") to the gcc you downloaded.