linux-kernel - Re: [PATCH] Documentation: Restrict TSC test code to x86

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Date:	Sun, 02 Nov 2014 09:16:49 +0100
From:	Alexander Graf <agraf@...e.de>
To:	"Matwey V. Kornilov" <matwey.kornilov@...il.com>
CC:	Jonathan Corbet <corbet@....net>,
	Peter Foley <pefoley2@...oley.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Jiri Kosina <jkosina@...e.cz>,
	Randy Dunlap <rdunlap@...radead.org>,
	"afaerber@...e.de" <afaerber@...e.de>
Subject: Re: [PATCH] Documentation: Restrict TSC test code to x86



On 02.11.14 08:46, Matwey V. Kornilov wrote:
> I wish I knew. We need KBuild guru to ask how to take into account
> host architecture.

Hrm. At least this patch makes things more consistent with the other
Documentation makefiles:

Documentation/timers/Makefile:hostprogs-$(CONFIG_X86) := hpet_example
Documentation/vDSO/Makefile:hostprogs-$(CONFIG_X86) :=
vdso_standalone_test_x86

But I agree, it is wrong in general - hostprogs should make sure the
host arch matches.

We could maybe just evaluate the host uname output:

  ifeq ($(shell uname -m),x86_64)
    hostprogs-$(CONFIG_X86) := ...
  endif

Then we're double safe ;). Not sure how to easily add x86 to the mix as
well here, but I'm not sure anyone cares. Do people still compile on
32bit x86 hosts? And expect Documentation/ examples to build?


Alex
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