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    SubjectRe: [PATCH] perf tools: Makefile: Use gcc to determine ARCH

    * Lin Ming <> wrote:

    > The original Makefile uses "uname -m" to determine ARCH.
    > This causes problem on x86 when compile perf tool on 32 bit userspace
    > with a 64 bit kernel.
    > bench/../../../arch/x86/lib/memcpy_64.S: Assembler messages:
    > bench/../../../arch/x86/lib/memcpy_64.S:28: Error: bad register name `%rdi'
    > This is because "uname -m" returns x86_64 and memcpy_64.S is included in 32 bit build.
    > Signed-off-by: Lin Ming <>

    this changelog is missing an important line:

    Reported-by: Riccardo Magliocchetti <>

    I've added it.



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