What can i do if gcc is unable to find the include files?

How do I know which PLATFORM, PLATFORMSUB to select?

Is there some mapping between model numbers and PLATFORM?

For example, I have an SD1000, can I look up the appropriate PLATFORM, PLATFORMSUB somewhere?

GCC 4.x entry is not working

GCC 4.x entry is not working. There is a broken link to something called drop there. The CHDK releases are on 4.4 , so I assume there is a way to get it working.