linux-kernel - Re: [PATCH 2/7] kbuild: Add P= command line flag to run checkpatch

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Date:   Mon, 20 Nov 2017 22:10:12 +0100
From:   Knut Omang <knut.omang@...cle.com>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Jim Davis <jim.epost@...il.com>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <mmarek@...e.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH 2/7] kbuild: Add P= command line flag to run checkpatch

On Mon, 2017-11-20 at 21:08 +0100, Luc Van Oostenryck wrote:
> On Mon, Nov 20, 2017 at 12:48:35PM -0700, Jim Davis wrote:
> > 
> > I'd be nice if people could just specify CHECK and CHECKFLAGS to run
> > their favorite checker, but currently CHECKFLAGS seems hardwired for
> > running sparse.  So something liike
> > 
> > make C=1 CHECK="scripts/checkpatch.pl" CHECKFLAGS="--quiet --file"
> > 
> > fails when checkpatch is passed lots of arguments like -D__linux__
> > -Dlinux -D__STDC__ .  A little shell wrapper to grab the last argument
> > in that long list is a workaround, but perhaps CHECKFLAGS should be
> > made less sparse-specific?
> 
> It should be noted though that CHECKFLAGS contains very very few
> sparse specific things. It's mainly flags for the compiler
> coming from  KBUILD_CFLAGS (which of course, sparse needs to
> do its job properly).

Yes, and we would want some arguments passed to checkpatch by default as well.

A wrapper script (which by the way was what I started this with..)
could of course solve this and other issues such as the ability 
to run multiple checkers, but I am not convinced that that would be 
less ugly?

Thanks,
Knut

> 
> -- Luc Van Oostenryck