linux-kernel - Re: [BUG: 2.6.26-rc3] ERROR: "____ilog2

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Message-ID: <20080525210329.GN1791@cs181133002.pp.htv.fi>
Date:	Mon, 26 May 2008 00:03:29 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Mirco Tischler <mt-ml@....de>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [BUG: 2.6.26-rc3] ERROR: "____ilog2_NaN" undefined

On Sun, May 25, 2008 at 10:57:16PM +0200, Mirco Tischler wrote:
> On So, 2008-05-25 at 23:18 +0300, Adrian Bunk wrote:
> > > Gnu C                  4.3.0-4ubuntu1)
> > >...
> > 
> > I'd have said your gcc has a bug regarding __builtin_constant_p(),
> > but I can't reproduce it on i386 with the compiler you are using.
> 
> > You are using exactly this compiler for compiling your kernel?
> I tried several versions now (4.1, 4.3. 4.4pre) and all showed the
> error. I'm using ccache, maybe this has something to do with it? (Though
> I doubt it)

If ccache would always select a completely broken compiler that would 
explain it...

(But it's unlikely.)

Can you try building without ccache?

Can you also try downloading the kernel sources as a tarball from 
ftp://ftp.kernel.org/pub/linux/kernel/v2.6/testing ?

> Btw: you noticed that this is x86_64 and not i386?

I noticed (but I currently only have a 32bit userspace, and for this 
kind of error it shouldn't matter).

> > If yes I'm unfortunately out of ideas...  :-(
> I have another config that builds properly. Actually I just changed some
> options to the config posted before. If nobody shouts "trivial" I could
> try to filter out the guilty option if there is any. But I possibly
> won't find the time before mid of the week.
> 
> Thanks
> Mirco

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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