I've used this hack to restore PPC support to Xcode 4.
However, every time I tried to create a universal binary, it would just create an Intel binary. After a lot of experimentation with parameters, I think I found the solution.
I had to set the Architectures and the Valid Architectures settings to ppc i386 x86_64
It then seems I have to explicitly set the compiler version to GCC 4.2, rather than LLVM GCC 4.2 which it defaults to.
So my question is, are there any implications to doing this?