linux-kernel - Re: [PATCH 1/2] kbuild: asm-generic support

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Date:	Thu, 13 Jan 2011 17:14:05 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	linux arch <linux-arch@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Guan Xuetao <guanxuetao@...c.pku.edu.cn>
Subject: Re: [PATCH 1/2] kbuild: asm-generic support

On 9.1.2011 20:29, Sam Ravnborg wrote:
> diff --git a/scripts/asm-generic.sh b/scripts/asm-generic.sh
> new file mode 100644
> index 0000000..d28127f
> --- /dev/null
> +++ b/scripts/asm-generic.sh
> @@ -0,0 +1,33 @@
> +#!/bin/sh
> +#
> +# include/asm-generic contains a lot of files that are used
> +# verbatim by several architectures.
> +#
> +# This scripts read the file arch/$(ARCH)/include/asm/Kbuild
> +# and for each file listed in this file with generic-y create
> +# a small wrapper file in arch/$(ARCH)/include/generated/
> +
> +# read list of header files form Kbuild
> +# The file has make syntax which looks like this:
> +#
> +# generic-y += <filename>
> +
> +srcdir=${srctree}/arch/$1/include/asm
> +gendir=arch/$1/include/generated/asm
> +
> +# Read the list of files (note that the list uses make syntax)
> +files=$( cat ${srcdir}/Kbuild | \
> +          grep -v ^# | grep generic-y | cut -d '=' -f 2)

Now that the list of required generic headers is in a Kbuild file, it
would be better to let make parse it, instead of enforcing one way to
construct the list (it is the preferred way, but C files that do not
conform to Documentation/CodingStyle are not rejected by the compiler
either). I will post a patch when I'm back online in the evening.

Michal
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