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    SubjectRe: [PATCH] perf: Add util/include/linux/config.h for including generated autoconf.h of kernel
    On Thu, Jan 28, 2010 at 11:28:48PM +0900, Hitoshi Mitake wrote:

    > I'd like to add util/include/linux/config.h,
    > this header file includes autoconf.h which is generated
    > by build phase of kernel.
    >
    > This makes building of perf depend on building of kernel.
    > It's a little dirty. But perf has tight relation
    > of its kernel, so I don't think that it is a serious problem.
    >
    > My original purpose of making this patch is
    > knowing size of void *.
    > If config.h is available,
    > CONFIG_ARCH_PHYS_ADDR_T_64BIT will be provided for source of perf,
    > we can know size of void * by this config.
    >
    > How do you think?

    How will this work if I built the kernel in a separate object
    directory (e.g., using "make O=../builddir vmlinux")? I think that
    trying to include generated files will fail in that case.

    In general I think that tying perf to the kernel config is a bad idea.

    Paul.


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