Re: make[2]: *** No rule to make target 'tools/testing/nvdimm//config_check.o', needed by 'tools/testing/nvdimm//dax.o'.

[Dan Williams]

On Mon, Aug 15, 2016 at 3:03 AM, kbuild test robot
<fengguang.wu@xxxxxxxxx> wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   694d0d0bb2030d2e36df73e2d23d5770511dbc8d
> commit: ab68f26221366f92611650e8470e6a926801c7d4 /dev/dax, pmem: direct access to persistent memory
> date:   3 months ago
> config: i386-randconfig-i1-201633 (attached as .config)
> compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
> reproduce:
>         git checkout ab68f26221366f92611650e8470e6a926801c7d4
>         # save the attached .config to linux build tree
>         make ARCH=i386
>
> All errors (new ones prefixed by >>):
>
>>> make[2]: *** No rule to make target 'tools/testing/nvdimm//config_check.o', needed by 'tools/testing/nvdimm//dax.o'.
>    make[2]: Target '__build' not remade because of errors.

I think this is an invalid build test.  tools/testing/nvdimm/ uses a
external module Kbuild environment, not Kconfig.  So, there's nothing
I can do to prevent this compile error, unless there's some other way
0-day could determine the configuration dependencies?