netdev - Re: selftests/bpf doesn't compile

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Date:   Fri, 15 Sep 2017 11:14:42 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Shuah Khan <shuahkh@....samsung.com>
Cc:     Shuah Khan <shuah@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Thomas Meyer <thomas@...3r.de>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Networking <netdev@...r.kernel.org>
Subject: Re: selftests/bpf doesn't compile

On Fri, Sep 15, 2017 at 11:00:31AM -0600, Shuah Khan wrote:
> >> I could add a special target for bpf TARGET_BPF perhaps and exclude it from
> >> the run_test> 
> > I'm not sure what was the motivation to exclude hotplug from default testing,
> 
> These are considered a bit more disruptive and were excluded a while
> back. These take cpus and memory on and off-line. Also require
> root access. So even if they are included in the regular run, these
> won't run.

most of bpf tests require root access as well.

> The first failure due to clang dependency is not a problem. The second one
> in the case of "make kselftest" is the one that requires some work when bpf
> make is run from the main Makefile. A lots of users run tests using the
> kselftest target from the mail Makefile. hence I would like to get this
> working, so it would be easier to run this test on test servers.

'make kselftest' doesn't work for me at all, since I suspect it
assumes in-source build. I always use KBUILD_OUTPUT,
since I build multiple archs with different configs out of the same
source tree, so there is a bigger problem here.

$ make kselftest
make[1]: Entering directory `/data/users/ast/net-next/bld_x64'
make: Entering an unknown directory
make: *** tools/testing/selftests: No such file or directory.  Stop.
make: Leaving an unknown directory
make[1]: *** [kselftest] Error 2
make[1]: Leaving directory `/data/users/ast/net-next/bld_x64'
make: *** [sub-make] Error 2