linux-kernel - Re: [PATCH] kconfig/menuconfig: use TAILQ instead of CIRCLEQ

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Message-Id: <201210202343.IED90702.SFHOJFOVMtQFLO@I-love.SAKURA.ne.jp>
Date:	Sat, 20 Oct 2012 23:43:40 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	mmarek@...e.cz
Cc:	yann.morin.1998@...e.fr, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org, bpoirier@...e.de,
	yselkowitz@...il.com
Subject: Re: [PATCH] kconfig/menuconfig: use TAILQ instead of CIRCLEQ

Michal Marek wrote:
> On 19.10.2012 14:10, Tetsuo Handa wrote:
> > Yann E. MORIN wrote:
> >> So, switch to using TAILQ instead, which are more portable.
> [...]
> > Excuse me, but your patch does not solve my problem because kconfig started
> > using macros which does not exist in "@(#)queue.h 8.3 (Berkeley) 12/13/93".
> > Kconfig still fails after applying your patch:
> > 
> >   HOSTCC  scripts/kconfig/mconf.o
> > scripts/kconfig/mconf.c: In function `update_text':
> > scripts/kconfig/mconf.c:326: warning: implicit declaration of function `TAILQ_FOREACH'
> [...]
> > scripts/kconfig/mconf.c:378: warning: implicit declaration of function `TAILQ_HEAD_INITIALIZER'
> > 
> > So, would you add something which looks like "sed -e 's/CIRCLEQ/TAILQ/g'" upon
> > https://lkml.org/lkml/2012/10/16/274 ?
> 
> Could you reduce that patch to not copy all of queue.h?
> TAILQ_HEAD_INITIALIZER can be replaced by a TAILQ_INIT() call after
> variable definitions, and we do not need stuff like
> TAILQ_FOREACH_REVERSE. The other option is to reimplement the needed
> operations under a different name, so that people don't accidentally use
> other macros that are missing in old queue.h revisions.
> 
> Michal
> 

I'm fine to manually add missing macros to /usr/include/sys/queue.h of
"@(#)queue.h 8.3 (Berkeley) 12/13/93" in my environment instead of adding
define-as-needed lines to scripts/kconfig/expr.h, for missing macros are
available with that of "@(#)queue.h 8.5 (Berkeley) 8/20/94".
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