gcc -xc -E -dM /dev/null

[crazyscot]

Every now and then I find myself needing to remember the gcc rune (above) to list the built-in pre-processor symbols. Google knows it, of course, but I just came across a scrap of paper with the scrawling. How very 1990s. So rather than keeping it buried amidst the silt of my physical desk, I'm going to try keeping it buried amid the silt of my virtual consciousness to see if that's a more useful place for it.