Re: [PATCH 3/3] selftests/kcmp: Always try to build the test

On Thu, 2014-10-23 at 09:06 -0400, Christopher Covington wrote:

Hi Michael,

On 10/23/2014 01:07 AM, Michael Ellerman wrote:

quoted

Don't prevent the test building on non-x86. Just try and build it and
let the chips fall where they may.

As a user of kcmp via CRIU on arm and arm64, thanks!

quoted

diff --git a/tools/testing/selftests/kcmp/Makefile b/tools/testing/selftests/kcmp/Makefile
index 4f00c0524501..cda9cc4004c9 100644
--- a/tools/testing/selftests/kcmp/Makefile
+++ b/tools/testing/selftests/kcmp/Makefile

@@ -1,21 +1,7 @@
-uname_M := $(shell uname -m 2>/dev/null || echo not)
-ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/)
-ifeq ($(ARCH),i386)
-        ARCH := x86
-	CFLAGS := -DCONFIG_X86_32 -D__i386__
-endif
-ifeq ($(ARCH),x86_64)
-	ARCH := x86
-	CFLAGS := -DCONFIG_X86_64 -D__x86_64__
-endif
 CFLAGS += -I../../../../usr/include/
 
 all:
-ifeq ($(ARCH),x86)
 	gcc $(CFLAGS) kcmp_test.c -o kcmp_test

Not that this needs to be addressed in this patch, but this looks broken for
cross compilation. It looks like some of the other selftests use:

CC = $(CROSS_COMPILE)gcc

But perhaps this should be set (and perhaps with ':=') once at the top level.

The best solution IMHO is:

  CC := $(CROSS_COMPILE)$(CC)

Because it allows cross compiling, but also allows overriding of CC.

Will resend with that change.

cheers