Gentoo likes to use that variable for itself and insists on keeping it.
Meanwhile it doesn't seem to be set or used anywhere else in the gcc
build, and it seems there was a big $(P)-pruning going on in 2000,
so why is it even (still) there?
Related upstream change can be found at
https://gcc.gnu.org/ml/gcc-patches/2017-07/msg01015.html
Change-Id: I2c2bdf9cb215c489f760f43642a86592924e4e65
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/20612
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
9f4864f499