KBuild problem (or difference) in 2.6.14-rc3

From: Mark Rustad (mrustad_at_mac.com)
Date: 10/11/05

  • Next message: Chris Wright: "Re: [BUG/PATCH/RFC] Oops while completing async USB via usbdevio" 
    To: linux-kernel@vger.kernel.org
Date:	Mon, 10 Oct 2005 17:43:06 -0500

    I have noticed a change in Kbuild behavior when going from 2.6.13.x
    to 2.6.14-rc3. I build kernels with a separate objects directory. It
    has been my practice since beginning with 2.6 kernels last year, to
    put changed files into the objects directory structure to override an
    unmodified source tree. Starting with 2.6.14, I find that Makefiles
    in the objects directory structure area not used. I find that source
    and Kconfig files do override as they used to, but Makefiles do not.

    I don't really know if this new behavior is intended or not, but it
    sure messes my kernel build methodology up. It looks to me like the
    problem was introduced by changes in scripts/Makefile.build. I think
    that this is the change causing me trouble:

    --- a/scripts/Makefile.build
    +++ b/scripts/Makefile.build
    @@ -10,8 +10,11 @@ __build:
    # Read .config if it exist, otherwise ignore
      -include .config

    -include $(if $(wildcard $(obj)/Kbuild), $(obj)/Kbuild, $(obj)/Makefile)
    +# The filename Kbuild has precedence over Makefile
    +kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
    +include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild,
    $(kbuild-dir)/Makefile)

    +include scripts/Kbuild.include
      include scripts/Makefile.lib

      ifdef host-progs

    Does anyone know if this change in behavior was intended? I realize
    that I may be doing something a little bit unusual, but I have been
    doing things this way very successfully since at least 2.6.5. 

    -- 
Mark Rustad, MRustad@mac.com
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  • Next message: Chris Wright: "Re: [BUG/PATCH/RFC] Oops while completing async USB via usbdevio"