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From:   Brendan Higgins <brendanhiggins@google.com>
Date:   Mon, 27 Jul 2020 14:29:17 -0700
Message-ID: <CAFd5g47cQ6tC3cLOqFiHHNO9XjgpTQLNsw=-bBKvsPMs+DGrLg@mail.gmail.com>
Subject: Re: kunit compile failed on um
To:     Cixi Geng <gengcixi@gmail.com>
Cc:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@vger.kernel.org>,
        KUnit Development <kunit-dev@googlegroups.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Orson Zhai <orsonzhai@gmail.com>, zhang.lyra@gmail.com
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On Mon, Jul 27, 2020 at 3:01 AM Cixi Geng <gengcixi@gmail.com> wrote:
>
> Hi Brendan:
> When I run kunit test in um , it failed on kernel 5.8-rc* while
> succeeded  in v5.7 with same configuration. is this a bug?
>
> Here is my operation:
>  gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
>
> the kunitconfig:
> Cixi.Geng:~/git-projects/torvals-linux$ cat .kunitconfig
> CONFIG_KUNIT=y
> CONFIG_KUNIT_TEST=y
> CONFIG_KUNIT_EXAMPLE_TEST=y
>
> command:
> Cixi.Geng:~/git-projects/torvals-linux$ ./tools/testing/kunit/kunit.py run
>
> the Error log:
> [17:51:14] Configuring KUnit Kernel ...
> [17:51:14] Building KUnit Kernel ...
> ERROR:root:b"make[1]:
> \xe8\xbf\x9b\xe5\x85\xa5\xe7\x9b\xae\xe5\xbd\x95\xe2\x80\x9c/home/cixi.geng1/git-projects/torvals-linux/.kunit\xe2\x80\x9d\n/home/cixi.geng1/git-projects/torvals-linux/Makefile:551:
> recipe for target 'outputmakefile' failed\nmake[1]:
> \xe7\xa6\xbb\xe5\xbc\x80\xe7\x9b\xae\xe5\xbd\x95\xe2\x80\x9c/home/cixi.geng1/git-projects/torvals-linux/.kunit\xe2\x80\x9d\nMakefile:185:
> recipe for target '__sub-make' failed\n"

So we have a fix out for the cryptic error messages:

https://patchwork.kernel.org/patch/11652711/

But I believe it has not been picked up yet.

In the meantime, you should get more information by running

ls .kunit
make ARCH=um O=.kunit

Let us know if you have any additional questions.