linux-kernel - Re: kbuild breaks um - fails to find util when linking

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Message-ID: <20080612210615.GA7558@uranus.ravnborg.org>
Date:	Thu, 12 Jun 2008 23:06:15 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Jeff Dike <jdike@...toit.com>
Cc:	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kbuild breaks um - fails to find util when linking

On Thu, Jun 12, 2008 at 04:13:15PM -0400, Jeff Dike wrote:
> On Thu, Jun 12, 2008 at 08:08:59PM +0200, Sam Ravnborg wrote:
> > Following patch will result in a building ARCH=um kernel.
> > If it works I dunno.
> 
> You can just try running it.  Given its behavior with this patch so
> far, it would be an excellent sign for it to figure out that it has no
> root filesystem and panic.
> 
> Anyway, I can't get it to give me a UML binary.  I see this in the
> build output (and V=3 doesn't make it any more verbose):
> 
> 
> 	  CHK     include/linux/compile.h
> 	  LINK linux
> 
> 	Compilation finished at Thu Jun 12 16:11:15
> 
> but no linux or vmlinux in my output directory.

So appearantly kbuild thinks you have a vmlinux
so no need to relink.
And the line "LINK linux" implies this as well.

Please double check that you do not have a vmlinux,
and try V=2" to see where LINK picks up the vmlinux.

My build finised:
$ ./linux
 ./linux: /usr/lib/libc.so.1: bad ELF interpreter: No such file or directory

So I will take an additional look tomorrow.

	Sam
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