grub2.inc: remove '-O2' from CFLAGS

It fails to boot grub after upgrade grub to 2.06. According to
description in

https://bugzilla.yoctoproject.org/show_bug.cgi?id=14367

it is introduced by a commit to fix CVE. So remove option '-O2' from
CFLAGS rather than revert the commit to avoid the failure.

[YOCTO #14367]

CC: Tony Battersby <tonyb@cybernetics.com>
(From OE-Core rev: 3575290c4cc937ae2f2c5604a5619ac6de9aa071)

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 69805629b8f47fd46a37b7c5cc435982e2ac3d1d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index 5a6e213936..bfcda76c24 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -128,6 +128,8 @@ GRUBPLATFORM ??= "pc"
 
 inherit autotools gettext texinfo pkgconfig
 
+CFLAGS_remove = "-O2"
+
 EXTRA_OECONF = "--with-platform=${GRUBPLATFORM} \
                 --disable-grub-mkfont \
                 --program-prefix="" \