Testing removal of ifdef or configure checks

From SambaWiki

#ifdef removal is risky

Large-scale removal of "unused" ifdef or the configure checks that produce #defines is an important, but risky task.

It is difficult (and time consuming) to prove that the code is unused and that there is no change to the compiled output.

A script to help

File:Gcc-E.py.txt is a Python script that wraps gcc -E to attempt to solve this dilemma, so as to provide a result that can be reasoned with via tools like dirdiff