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    SubjectRe: selftests: bpf: test_libbpf.sh failed at file test_l4lb.o
    On Mon, Jun 24, 2019 at 12:58:15PM -0700, Alexei Starovoitov wrote:
    > On Mon, Jun 24, 2019 at 12:53 PM Dan Rue <dan.rue@linaro.org> wrote:
    > >
    > > I would say if it's not possible to check at runtime, and it requires
    > > clang 9.0, that this test should not be enabled by default.
    >
    > The latest clang is the requirement.
    > If environment has old clang or no clang at all these tests will be failing.

    Hi Alexei!

    I'm not certain if I'm interpreting you as you intended, but it sounds
    like you're telling me that if the test build environment does not use
    'latest clang' (i guess latest as of today?), that these tests will
    fail, and that is how it is going to be. If I have that wrong, please
    correct me and disregard the rest of my message.

    Please understand where we are coming from. We (and many others) run
    thousands of tests from a lot of test frameworks, and so our environment
    often has mutually exclusive requirements when it comes to things like
    toolchain selection.

    We believe, strongly, that a test should not emit a "fail" for a missing
    requirement. Fail is a serious thing, and should be reserved for an
    actual issue that needs to be investigated, reported, and fixed.

    This is how we treat test failures - we investigate, report, and fix
    them when possible. When they're not real failures, we waste our time
    (and yours, in this case).

    By adding the tests to TEST_GEN_PROGS, you're adding them to the general
    test set that those of us running test farms try to run continuously
    across a wide range of hardware environments and kernel branches.

    My suggestion is that if you do not want us running them, don't add them
    to TEST_GEN_PROGS. I thought the suggestion of testing for adequate
    clang support and adding them conditionally at build-time was an idea
    worth consideration.

    Thanks,
    Dan

    --
    Linaro - Kernel Validation

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