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    Subject[PATCH] compiler-clang: add build check for clang 10.0.1
    From
    During Plumbers 2020, we voted to just support the latest release of
    Clang for now. Add a compile time check for this.

    Older clang's may work, but we will likely drop workarounds for older
    versions.

    Link: https://github.com/ClangBuiltLinux/linux/issues/9
    Link: https://github.com/ClangBuiltLinux/linux/issues/941
    Suggested-by: Sedat Dilek <sedat.dilek@gmail.com>
    Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
    ---
    include/linux/compiler-clang.h | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
    index cee0c728d39a..7338d3ffd240 100644
    --- a/include/linux/compiler-clang.h
    +++ b/include/linux/compiler-clang.h
    @@ -3,6 +3,14 @@
    #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
    #endif

    +#define CLANG_VERSION (__clang_major__ * 10000 \
    + + __clang_minor__ * 100 \
    + + __clang_patchlevel__)
    +
    +#if CLANG_VERSION < 100001
    +# error Sorry, your compiler is too old - please upgrade it.
    +#endif
    +
    /* Compiler specific definitions for Clang compiler */

    /* same as gcc, this was present in clang-2.6 so we can assume it works
    --
    2.28.0.297.g1956fa8f8d-goog
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