For Developers: Running iPhone Duo Support on Beta Xcode Without Stopping the Current Version—Setting Up Two Xcode Cloud Workflows and Using a Single Tag fo…

The iPhone Duo will be released on October 23rd. I want to have a compatible version ready on launch day. However, the SDK ...
Ars Technica

Using IBM XLC/XLF in XCode?

Anyone know how to set up XCode to use IBM's compilers, rather than gcc? I'm especially interested in setting up XCode to use XLF for some Fortran libraries, which are then linked to C/Obj-C programs.