linux-kernel - Re: [PATCH v3 11/11] selftests: error out if kernel header files are not yet built

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Date:   Fri, 3 Nov 2023 13:16:52 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     John Hubbard <jhubbard@...dia.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Peter Xu <peterx@...hat.com>, Shuah Khan <shuah@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: Re: [PATCH v3 11/11] selftests: error out if kernel header files are
 not yet built

On Tue, Jun 06, 2023 at 12:16:37AM -0700, John Hubbard wrote:
> As per a discussion with Muhammad Usama Anjum [1], the following is how
> one is supposed to build selftests:
> 
>     make headers && make -C tools/testing/selftests/mm
> 
> Change the selftest build system's lib.mk to fail out with a helpful
> message if that prerequisite "make headers" has not been done yet.
> 

NAK NAK NAK

This now means I can no longer run selftests, I thank you very much! :-/

root@spr:/usr/src/linux-2.6# make O=defconfig-build/ -j64
make[1]: Entering directory '/usr/src/linux-2.6/defconfig-build'
***
*** The source tree is not clean, please run 'make mrproper'
*** in /usr/src/linux-2.6


I've always done:

  cd tools/testing/selftests/x86; make

and that has always worked

Now I can't bloody well build *any* selftest or risk not being able to
do builds.