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Message-ID: <24025.1262933694@localhost>
Date:	Fri, 08 Jan 2010 01:54:54 -0500
From:	Valdis.Kletnieks@...edu
To:	Randy Dunlap <randy.dunlap@...cle.com>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Michal Marek <mmarek@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: mmotm 2010-01-06-14-34 uploaded (squashfs+lib/decomp)

On Thu, 07 Jan 2010 08:04:02 PST, Randy Dunlap said:
> On Wed, 06 Jan 2010 23:01:47 -0500 Valdis.Kletnieks@...edu wrote:
> 
> > On Wed, 06 Jan 2010 22:48:16 EST, Valdis.Kletnieks@...edu said:
> > 
> > > Building with CONFIG_SQUASHFS=m, CONFIG_SQUASHFS_LZMA=y ,
> > > and CONFIG_DECOMPRESS_LZMA=n fails:
> > 
> > > Looks like a missing select/depends for DECOMPRESS_LZMA.  Somebody else can
> > > decide which it should be...
> > 
> > Digging further:
> >   
> >   x Symbol: DECOMPRESS_LZMA [=n]                                            x  
> >   x   Selected by: RD_LZMA [=n] && BLK_DEV_INITRD [=y] || SQUASHFS_LZMA [=y x  
> > 
> > How the heck did this happen?  Looks like a SELECT *is* there but it's
> > not firing??!?
> 
> I saw this build error in linux-next and sent a patch for it -- it's below.
> However, it doesn't appear to be exactly the same config as yours.

Yeah, that patch is how you ended up cc'ed - it was already in the linux-next
patch in Andrew's -mmotm tarball.  It looked like you addressed one corner case
of the problem, and I tripped over another.  But now I'm trying to get my
brain wrapped around how I was able to get SQUASHFS_LZMA=y, and it had a
select for DECOMPRESS_LZMA, but that *still* was 'n' anyhow? How did we end
up with both && and || in that 'Selected by:' line?  Is that saying that
RD_LZMA needs to be on too?

Adding some plausible-sounding kbuild-related entries from MAINTAINERS to
the cc: list, maybe they can explain it...

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