linux-kernel - Re: [patch] Makefile: can't build modules outside the kernel tree if it was built using O=

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Message-ID: <20090918045259.GA23333@merkur.ravnborg.org>
Date:	Fri, 18 Sep 2009 06:52:59 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Am?rico Wang <xiyou.wangcong@...il.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Caveh Jalali <ecaveh@...il.com>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch] Makefile: can't build modules outside the kernel tree
	if it was built using O=

On Fri, Sep 18, 2009 at 09:49:53AM +0800, Am?rico Wang wrote:
> On Thu, Sep 17, 2009 at 7:45 PM, Arnd Bergmann <arnd@...db.de> wrote:
> > On Thursday 17 September 2009, Caveh Jalali wrote:
> >
> >> when the platform specific include directories were shuffled around
> >> without updating the
> >> top level Makefile.  however, i think this FAIL is generic, and not
> >> limited to powerpc.
> >> here's a patch to the top level Makefile to teach it about the shuffled files:
> >>
> >>
> >> --- /local/caveh/linux/linux-2.6.31/Makefile    2009-09-09
> >> 15:13:59.000000000 -0700
> >> +++ Makefile    2009-09-16 12:23:05.000000000 -0700
> >> @@ -958,9 +958,9 @@ ifneq ($(KBUILD_SRC),)
> >>                 echo "  in the '$(srctree)' directory.";\
> >>                 /bin/false; \
> >>         fi;
> >> -       $(Q)if [ ! -d include2 ]; then                                  \
> >> -           mkdir -p include2;                                          \
> >> -           ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
> >> +       $(Q)if [ ! -d include2 ]; then                                   \
> >> +           mkdir -p include2;                                           \
> >> +           ln -fsn $(srctree)/arch/$(SRCARCH)/include/asm include2/asm; \
> >>         fi
> >>  endif
> >
> > I think we should no longer have the include2 directory at all with new kernels.
> >
> > LINUXINCLUDE already contains the right path in theory:
> >
> > LINUXINCLUDE    := -Iinclude \
> >                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
> >                   -I$(srctree)/arch/$(hdr-arch)/include               \
> >                   -include include/linux/autoconf.h
> 
> Hmm, at least in mmotm, we still have include2...
> 
> Maybe Sam is queueing the patches to remove include2?
I have them queued - yes.
But as they never hit -next they will wait another cycle.

	Sam
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