[U-Boot] [PATCH] tegra: override compiler flags for cmd_nvedit

[Allen Martin]

Override -march setting for tegra to -march=armv4t for cmd_nvedit.c

The recent change to use -march=armv7-a for armv7 caused a regression
on tegra because tegra starts boot on a arm7tdmi processor before
transferring control to the cortex-a9.  While still executing on the
arm7tdmi there is a call to getenv_ulong() that causes an illegal
instruction exception if cmd_nvedit is compiled for armv7.

Signed-off-by: Allen Martin <amartin at nvidia.com>
---
 common/Makefile |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/common/Makefile b/common/Makefile
index d9f10f3..e1b5307 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -43,6 +43,12 @@ COBJS-y += cmd_help.o
 COBJS-y += cmd_nvedit.o
 COBJS-y += cmd_version.o
 
+# tegra calls getenv_ulong() from the context of the arm7tdmi processor
+# so this needs to be compiled armv4t on tegra
+ifneq ($(CONFIG_MACH_TEGRA_GENERIC),)
+CFLAGS_common/cmd_nvedit.o += -march=armv4t
+endif
+
 # environment
 COBJS-y += env_common.o
 COBJS-$(CONFIG_ENV_IS_IN_DATAFLASH) += env_dataflash.o
-- 
1.7.9.5