[Pkg-opencl-devel] Bug#888062: pocl: FTBFS on arm64: test_fabs and test_shuffle_{char, ..., float} fail

[Punit Agrawal]

Hi Aaron,

On Tue, Jan 23, 2018 at 1:26 AM, Aaron M. Ucko <ucko at debian.org> wrote:
> Source: pocl
> Version: 0.14-5
> Severity: important
> Tags: upstream
> Justification: fails to build from source
> User: debian-arm at lists.debian.org
> Usertags: arm64
>
> Builds of pocl for arm64 have been failing, per the below excerpts from
> https://buildd.debian.org/status/fetch.php?pkg=pocl&arch=arm64&ver=1.0-2&stamp=1516324314&raw=0
>
> I acknowledge that the output I've quoted doesn't make the cause of
> failure clear in these cases, but that's all the information I have.
> Perhaps you can reproduce the errors on a porter box.
>
> Could you please take a look?

There are two issues causing the test failure. I have a patch which
fixes one of the issues. More below...

[...]

>   7/121 Test  #22: kernel/test_shuffle_char ............................................................***Failed  Required regular expression found.Regex=[OK

The "Regex=[OK]" indicates that the test ran successfully and passed. But...

>
> ] 29.66 sec
> OK

... upstream expects a subset of test_shuffle_* tests to fail. They
are marked as WILL_FAIL in the below excerpt from
tests/kernel/CMakeLists.txt

    # interestingly, long/ulong/double do not fail
    if(ARM64)
      set_tests_properties("kernel/test_shuffle_char"
        "kernel/test_shuffle_short" "kernel/test_shuffle_ushort"
        "kernel/test_shuffle_uint" "kernel/test_shuffle_int"
        "kernel/test_shuffle_float" ${HALF_TEST}
      PROPERTIES
        WILL_FAIL 1)
    endif()

The attached patch (on top of the package repository) fixes it for me.

While investigating this failure, I noticed an unrelated issue with
the debian build for arm64 - instead of choosing a generic armv8 as
the target cpu, the rules file chooses to build with cortex-a53 (value
picked from debian/supported-arch). Just thought I'd mention it.

[...]

>  29/121 Test  #16: kernel/test_fabs ....................................................................***Failed  Error regular expression found in output. Regex=[FAIL]  4.82 sec
> CMake Error at /<<PKGBUILDDIR>>/cmake/run_test.cmake:22 (message):
>   FAIL: Test exited with nonzero code:
>   /<<PKGBUILDDIR>>/obj-aarch64-linux-gnu/tests/kernel/kernel;test_fabs
>
>
>   STDOUT:
>
>
>
>   STDERR:
>
>
>
> -- OK

This one seems to be an actual failure but the test code is a little
hard to parse. I'll try and see if I can figure out why it is failing.
In the meanwhile, please apply the attached patch as a partial fix.

Thanks,
Punit
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