From: shuah <shuah@kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Thomas Meyer <thomas@m3y3r.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
Shuah Khan <shuahkh@osg.samsung.com>,
Networking <netdev@vger.kernel.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
linux-kbuild <linux-kbuild@vger.kernel.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
shuah <shuah@kernel.org>
Subject: Re: selftests/bpf doesn't compile
Date: Fri, 4 Jan 2019 12:07:23 -0700 [thread overview]
Message-ID: <e7aac6da-26f0-f700-5ed0-12b8c5c918b3@kernel.org> (raw)
In-Reply-To: <CAMuHMdXRN=mSKTjZNBSxQi-pkgSrKqeANxD-GB+hqC8pDjx7nQ@mail.gmail.com>
Hi Geert,
On 1/4/19 10:16 AM, Geert Uytterhoeven wrote:
> Hi Shuah,
>
> CC kbuild, gpio
>
> On Thu, Sep 14, 2017 at 5:34 PM Shuah Khan <shuah@kernel.org> wrote:
>> bpf test depends on clang and fails to compile when
>>
>> ------------------------------------------------------
>> make -C tools/testing/selftests/bpf run_tests
>>
>>
>> make: clang: Command not found
>> Makefile:39: recipe for target '.linux-kselftest/tools/testing/selftests/bpf/test_pkt_access.o' failed
>> make: *** [./linux-kselftest/tools/testing/selftests/bpf/test_pkt_access.o] Error 127
>> make: Leaving directory '.linux-kselftest/tools/testing/selftests/bpf'
>
> The above failure is indeed due to missing clang.
>
>> With "make TARGETS=bpf kselftest" it fails earlier:
>>
>> make[3]: Entering directory './linux-kselftest/tools/lib/bpf'
>> Makefile:40: tools/scripts/Makefile.arch: No such file or directory
>> Makefile:84: tools/build/Makefile.feature: No such file or directory
>> Makefile:143: tools/build/Makefile.include: No such file or directory
>
> This is due to srctree being "." instead of the actual source tree,
> when invoked as "make kselftest".
> When using "make -C tools/testing/selftests", srctree is correct.
>
> tools/testing/selftests/bpf/Makefile has:
>
> $(BPFOBJ): force
> $(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
>
> to enter the tools/lib/bpf directory to force a build of libbpf.a
>
> Note that tools/gpio has the same issue.
>
> There seem to be _four_ different ways to build kselftests
> (Documentation/dev-tools/kselftest.rst):
>
> make kselftest
> make O=/path/to/output kselftest
> make -C tools/testing/selftests
> make O=/path/to/output -C tools/testing/selftests
>
> I'm not so fond of the latter two, as they basically run make from
> somewhere inside the tree, which complicates things. I believe we don't
> support this anywhere else.
>
> Each of the four seem to have (different) issues. Especially when you
> throw cross-compiling into the mix. And care about where installed
> headers end up (yes, kselftest calls headers_install internally).
>
> I'm working on fixes for some of them, but I don't know how to fix the
> srctree issue.
>
I will take a look at the srctree problem and fix it. I have had to fix
a few individual test Makefiles after ksefltest headers_install went in.
It will be in a week or two. I am taking some time off this week and
next week other than for occasional email checking.
thanks,
-- Shuah
next prev parent reply other threads:[~2019-01-04 19:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-08 11:19 [PATCH] selftests/bpf: Make bpf_util work on uniprocessor systems Thomas Meyer
2017-09-08 23:01 ` Alexei Starovoitov
2017-09-08 23:05 ` Daniel Borkmann
2017-09-14 15:01 ` Shuah Khan
2017-09-14 15:33 ` selftests/bpf doesn't compile Shuah Khan
2017-09-15 16:02 ` Alexei Starovoitov
2017-09-15 16:58 ` Edward Cree
2017-09-15 18:07 ` Alexei Starovoitov
2017-09-15 18:23 ` Daniel Borkmann
2017-09-15 18:48 ` Daniel Borkmann
2017-09-15 22:41 ` Shuah Khan
2017-09-18 13:31 ` Daniel Borkmann
2017-09-15 17:00 ` Shuah Khan
2017-09-15 17:44 ` Shuah Khan
2017-09-15 18:14 ` Alexei Starovoitov
2017-09-15 22:32 ` Shuah Khan
2019-01-04 17:16 ` Geert Uytterhoeven
2019-01-04 19:07 ` shuah [this message]
2017-09-19 14:45 ` [PATCH] selftests/bpf: Make bpf_util work on uniprocessor systems Shuah Khan
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