tree e6d936927424b32c693ad20f61f1990094765008
parent 21532b9e5bd597631cfe38d9eb34df069938065b
author Kees Cook <keescook@chromium.org> 1469568380 -0700
committer Michal Marek <mmarek@suse.com> 1469569859 +0200

kbuild: Abort build on bad stack protector flag

Before, the stack protector flag was sanity checked before .config had
been reprocessed. This meant the build couldn't be aborted early, and
only a warning could be emitted followed later by the compiler blowing
up with an unknown flag. This has caused a lot of confusion over time,
so this splits the flag selection from sanity checking and performs the
sanity checking after the make has been restarted from a reprocessed
.config, so builds can be aborted as early as possible now.

Additionally moves the x86-specific sanity check to the same location,
since it suffered from the same warn-then-wait-for-compiler-failure
problem.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>