title: Generate Makefile from Xcode Project for port of project to other UNIX systems
body: <p>(This was asked before but the answers were not conclusive)
  While I love development using Xcode (3.2.1), I have the need to port some projects to other UNIX systems, and even Windows. The code is all C++ but fairly complex. I'm looking for a way to automated / semi-automated generation of equivalent Makefiles out of my Xcode projects, after getting tired to do this by manual trial-and-error.</p>
  
  <p>Thanks for any hints.</p>
  
  <p>Manfred</p>