Writing automated tests for the GCC driver

[Giuliano Belinassi via Gcc]

Hi, all.

GCC have a extensive testsuite, that is no news at all. However they are
focused on the compiler (cc1*) or in libraries, and I can't find tests
related to the GCC driver.

Are there tests to the GCC driver? If yes, is there any docs about how
to write them?

Thank you,
Giuliano.