Tracking file processing from a plugin

[Florian Weimer]

I would like to track file processing, covering included header files, 
from a plugin, for C and C++.  I can get a notification when GCC starts 
processing the translation unit, but I don't see a way to get callbacks 
when header files are included.

I want to record a log of the compilation process so that I can replay 
it later, outside the original build environment and potentially with 
different GCC versions and plugins.  My naïve hope is that recording the 
original defines (both built-in and passed on the command line) and the 
contents of the files touched by GCC is sufficient for that.

-- 
Florian Weimer / Red Hat Product Security Team