linux-kernel - Re: [PATCH] Kbuild: allow code re-use across different directories

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Message-ID: <CACqU3MX2QJV51P67iUZ4EgDFSamXYgniFSHHQdG9J-BDgNz6Gg@mail.gmail.com>
Date:	Wed, 28 Sep 2011 18:20:09 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Michal Marek <mmarek@...e.cz>
Cc:	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Kbuild: allow code re-use across different directories

On Wed, Sep 28, 2011 at 5:42 PM, Michal Marek <mmarek@...e.cz> wrote:
> On Wed, Sep 14, 2011 at 12:24:14AM -0400, Arnaud Lacombe wrote:
>> Modify Kbuild to allow direct code re-use in multiple directory
>> without having to go through a copy. Technically, Kbuild would use by
>> default the VPATH feature
>
> I now found that the patch breaks headers_install and firmware_install
> when using O=
>
d'oh, I knew I forgot something! I'll have a look later on.

Thanks,
 - Arnaud

> $ mkdir build
> $ make O=build defconfig
> ...
> $ make O=build headers_install
>  CHK     include/linux/version.h
>  UPD     include/linux/version.h
>  HOSTCC  scripts/unifdef
> make[3]: *** No rule to make target `scripts/headers_install.pl', needed by `/labs/mmarek/linux-2.6/build/usr/include/asm-generic/.install'.  Stop.
> make[2]: *** [asm-generic] Error 2
> make[1]: *** [headers_install] Error 2
> make: *** [sub-make] Error 2
> $ make O=build firmware_install
>  GEN     /labs/mmarek/linux-2.6/build/Makefile
> scripts/kconfig/conf --silentoldconfig Kconfig
> make[2]: *** No rule to make target `firmware/e100/d101m_ucode.bin', needed by `/lib/firmware/e100/d101m_ucode.bin'.  Stop.
> make[1]: *** [firmware_install] Error 2
> make: *** [sub-make] Error 2
>
> Michal
>
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