These are used to adapt gem5 to the system it's being built on, and so should be attached to the host via the environment rather than gem5's configuration. Change-Id: I2adfe1af484dcdeae32a48097d9aa87752a7ed2a Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56752 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>