tree 634c22df72c1e6e3c138a77b8a24f6e7cd35faa2
parent 9c6ba597c60b6baa9cd156deecfbb1869ae98938
author Boyan Karatotev <boyan.karatotev@arm.com> 1670408808 +0000
committer Boyan Karatotev <boyan.karatotev@arm.com> 1670844550 +0000

docs: describe the new warning levels

When -Wextra was added, the warning levels changed their meaning. Add a
description in the build option section and leave the security hardening
section as mostly a pointer to it.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Iabf2f598d0bf3e865c9b991c5d44d2acb9572bd5