negating -include on the command line

[Benjamin Kosnik]

I've got a CPP and testsuite question: is there a way to do something like:

g++ -include bits/stdc++.h -noinclude bits/stdc++.h foo.cc?

This is a contrived example. 

Ie, I'm interested in setting up a bunch of testcases (libstd++
testsuite) that run with certain, defined flags (including the '-include
bits/stdc++.h' bit above). However, on some select files, I'd like to
pass in an extra flag that removes the pch file from the compilation
line.

How do I do this?

thanks,
benjamin