In my experience, a modern version of gcc is extremely difficult to bootstrap on anything but a fairly modern platform (e.g., I was having a hell of a time getting it going on HP-UX 11.23 with a ~2006 compiler). That's not a criticism of gcc. I'm only suggesting that if your platform lacks a modern (read: C++03-compliant) C++ compiler, you were probably already out of luck trying to get 4.7 bootstrapped.