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    Subject[kbuild] Re: linux-next: build failure after merge of the tip tree

    * Stephen Rothwell <> wrote:

    > Hi all,
    > On Mon, 31 Jan 2011 15:42:59 +1100 Stephen Rothwell <> wrote:
    > >
    > > After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
    > > failed like this:
    > >
    > > x86_64-linux-gcc: arch/x86/lib/memmove_64.c: No such file or directory
    > >
    > > Caused by commit 9599ec0471deae24044241e2173090d2cbc0e899 ("x86-64, mem:
    > > Convert memmove() to assembly file and fix return value bug") interacting
    > > with our build system.
    > >
    > > After removing arch/x86/lib/.memmove_64.o.cmd (left over from the build
    > > before merging the tip tree) from my object tree, it built correctly.
    > I am still getting this (of course).

    You reported this as a -tip build failure - but it appears to be some sort of kbuild
    bug/artifact, right? There was a leftover .memmove_64.o.cmd file from an old tree.

    When jumping between kernel versions via git checkout a 'make mrproper' is generally
    needed. In most cases 'make' will figure things out but it's not always guaranteed.

    So for example there are version transitions where a stale include/asm links could
    cause build problems.



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