netdev - Re: tools/testing/selftests/bpf/Makefile

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Date:   Sun, 23 Apr 2017 09:13:05 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     daniel@...earbox.net, netdev@...r.kernel.org
Subject: Re: tools/testing/selftests/bpf/Makefile

On Sat, Apr 22, 2017 at 03:45:01PM -0400, David Miller wrote:
> 
> Alexei, that unconditional -D__x86_64__ isn't going to work.  It in
> fact makes the build break on sparc because the types.h asm headers
> explicitly check for things like __sparc__ && __arch64__ etc.

yeah. it was a quick workaround for the following error:
In file included from net-next/tools/testing/selftests/bpf/test_xdp.c:8:
In file included from /usr/include/string.h:25:
In file included from /usr/include/features.h:399:
/usr/include/gnu/stubs.h:7:11: fatal error: 'gnu/stubs-32.h' file not found

the bpf progs don't do any x86 specific things.

> In every
> 	arch/${ARCH}/Makefile
> extract out the "-DXXX" stuff from CHECKFLAGS into a new Makefile

that should work. Probably there is even simpler way.