tree 34d5e70404988ecdf8c784359a4236053d3cf7e7
parent c773abc5d16bb3baf26069f22ad029d13b687a56
author Than McIntosh <thanm@google.com> 1588859942 -0400
committer Than McIntosh <thanm@google.com> 1588958387 +0000

gollvm: add workaround for hard-wired cf-protection=branch

Some newer linux distrubutions are shipping with
-fcf-protection=branch hard-wired on; this causes problems with the
gold linker when it is looking for split-stack prolog sequences. Until
the upstream bug https://sourceware.org/bugzilla/show_bug.cgi?id=25921
is fixed, work around this problem via additional cmake rules to test
if turning off cf-protection will allow split-stack examples to
compile.

Fixes golang/go#38728.

Change-Id: Ie2d41d59d9e6ce8e9c616b73771055780f9c1e09
Reviewed-on: https://go-review.googlesource.com/c/gollvm/+/232742
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: eric fang <eric.fang@arm.com>