[drivebycomment]

In my former life, I used to maintain a script that can be given two sets of objects files, one compiled with optimization, and one without, and the script will effectively do a binary search by choosing which object files you link and run the executable to determine success/fail. Each iteration is quick, since linking step is usually fast. This was useful when troubleshooting a big binary, since optimized build back then was often quite slow for a large executable.