Add default arch to fix compiling outside emake

Change-Id: I225c2ee7e703aad961c50ec8988ed2466886f266

R=wfrichar@chromium.org
BUG=none
TEST=make && make runtests

Review URL: http://codereview.chromium.org/6820018

1 files changed, 5 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index d12639d0..f1c4b601 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,11 @@ ifneq (${FIRMWARE_CONFIG_PATH},)
 include ${FIRMWARE_CONFIG_PATH}
 endif
 
+# Fix compiling directly on host (outside of emake)
+ifeq ($(ARCH),)
+export ARCH=amd64
+endif
+
 ifeq ($(FIRMWARE_ARCH),)
 CFLAGS += -DCHROMEOS_ENVIRONMENT
 endif