How to cross compile from Mac OS X to Linux x86?

Question

I\'m running Mac OS X 10.5.8 and want to compile for target CentOS 5.3 with GCC 4.1.2. How could I:

1. Compile GCC 4.1.2 toolchain and related tools?
2. Use

Answer 1

I struggled to get crosstool-ng to build on OSX 10.9 for x86_64 Linux. I used the very helpful post on how to build a gcc cross-compiler by Jeff Preshing and his script here as the basis for a script that worked for me. His script in the link doesn't work when compiling glibc on my version of OSX (which seems to be a very common complaint for those cross-compiling from OSX to Linux).

My script is here: https://github.com/johnlondon/Cross-compile-toolchain-for-linux-on-OSX