🚀 go-pugleaf

I'm trying to implement software configuration procedures which automatically
track how binaries are derived from source code.  I'm using RCS keywords to
keep track of which source revision a binary is compiled from, but I also want
to keep track of the compiler version and options that were used.  Using gcc,
part of what I want is provided by the builtin macro __VERSION__, which allows
for something like...

	static char rcsid[] = "@(#) $Id$ GCC Version: " __VERSION__;

The what(1) command can then be used to show version information.  

In order to provide the remaining information I need, I'm considering
implementing a similar builtin macro called __OPTIONS__ which would expand to a
string containing all the compilation options used.  Has anyone already done
this, or solved this traceability problem in some other way?

Roger