From: Andrew Pinski <pins...@gmail.com> Date: Sat, 17 Nov 2012 19:34:34 -0800
> (glibc is the best at doing this). It also uses "make" in pretty much the most inefficient way possible, by causing it to consider 10s of thousands of prefix rules for every rule target. GLIBC has the same ifdef check that is being suggested here in various places.
