[U-Boot] [PATCH] ARMv7: Build cache_v7.c with -O1 to avoid gcc6 breakage

[Hans de Goede]

It seems that building cache_v7.c with gcc6 with -O2 or -Os results in
an unreliable u-boot (only boots the kernel some of the time), at least
on sunxi boards. For details see:

https://bugzilla.redhat.com/show_bug.cgi?id=1318788

This commit adds -O1 at the end of the CFLAGS when building
cache_v7.c working around this.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 arch/arm/cpu/armv7/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile
index 45f346c..45a49fe 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -8,6 +8,7 @@
 extra-y	:= start.o
 
 obj-y	+= cache_v7.o
+CFLAGS_cache_v7.o := $(KBUILD_CFLAGS) -O1
 
 obj-y	+= cpu.o cp15.o
 obj-y	+= syslib.o
-- 
2.7.3