linux-kernel - Re: [PATCH] kbuild: collect shorthands into the top Makefile

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Date:	Fri, 31 Oct 2014 11:12:55 +0900
From:	Masahiro Yamada <yamada.m@...panasonic.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.cz>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kbuild: collect shorthands into the top Makefile

Hi Sam,

On Wed, 29 Oct 2014 19:59:07 +0100
Sam Ravnborg <sam@...nborg.org> wrote:

> On Wed, Oct 29, 2014 at 04:27:31PM +0900, Masahiro Yamada wrote:
> > The motivation of this commit is to avoid duplicated definitions
> > of "clean" and "hdr-inst" shorthands.
> > 
> > The shorthand "clean" is defined in both the top Makefile and
> > scripts/Makefile.clean.
> > 
> > Likewise, "hdr-inst" is defined in both the top Makefile and
> > scripts/Makefile.headersinst.
> > 
> > The idea here is define and export them in the top Makefile
> > because $(srctree) is constant during the build process.
> > 
> > For consistency, "build" and "modbuiltin" should be also moved.
> 
> As a general rule the exported names are always UPPERCASE, and local variables
> are lowercase. (srctree, objtree are the exceptions).
> This patch define new lowercase variables that conflicts with this.
> 
> And it is not that logical these are picked up from the enviroment.
> Could you find a central place to define them rahter than using
> the environemnt to export them?

Maybe we can collect them into scripts/Kbuild.include
although it might be too much for Makefile.clean to include
the whole things in Kbuild.include.


Best Regards
Masahiro Yamada

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