Re: [gentoo-embedded] x86 SBC Gentoo Embedded HowTo version 0.06 (almost finished)

[Quentin Arce]

--- michael@×××××××××××××.com wrote:

> Hi Yuri, Heath, Gentoo-embedded folks:
>
> I've taken your suggestion, Heath, and built a 2.6
> kernel (instead of
> the 2.4 I made by accident), and I've followed
> version 0.6 of your HOWTO
> with Yuri's comments.
>
> Grub loads, finds the kernel, and booting starts,
> but it doesn't go all
> the way:
>
>  	warning: unable to open an initial console
>  	kernel panic: no init found

I had this exact error for a while with a 2.6 kernel
and using syslinux to boot.  It turned out I had the
wrong root device.  The naming changed between my
image build system and the real system.  I'm assuming
you are building an embedded system for some old
hardware and it's not really an embedded system.

my 1.5 cents
Q 

> (That's not an exact quote). I've checked that my
> kernel's .config
> includes consoles, and that /dev/console exists and
> is linked to
> character device 5,1.
>
> I haven't done a whole lot of research into this yet
> but wonder if
> anything springs to your collective minds.
>
> As usual, any comments appreciated and any
> suggestions entertained.
>
> Michael
>
>
> On Mon, 6 Jun 2005, Yuri Vasilevski wrote:
>
> > Hi,
> >
> > On Mon, 6 Jun 2005 10:03:26 -0500
> > Heath H Holcomb <liquidcable@×××××.com> wrote:
> >
> >> Version 0.06
> >> Please add, delete, modify. Thanks!
> >
> > Just some things that came to my mind with respect
> to this
> > version.
> >
> >> This procedure produces a working embedded
> rootfs, that boots form a hard
> >> drive on a Geode based SBC (single board
> computer); at least on my
> >> development system.
> >>
> >> I've update my website with this version also.
> >> http://www.bulah.com/embeddedgentoo.html
> >>
> >>
> >>
>
#--------------------------------------------------------------------------------
> >> # Embedded Gentoo How-To for x86
> >> #
> >> # A how-to guide to setup a Gentoo embedded
> environment, you must be root.
> >> # These commands are to be run on your
> development system,
> >> # any x86 Gentoo Linux computer will do.  The
> system should be fast,
> >> # to speed development.  The target can be any
> x86 based SBC.  I'm
> >> # using a Geode based SBC.  Latter I'll use a Via
> based SBC.
> >> #
> >> # version 0.06
> >> # 2005.6.6
> >> #
> >> # Heath Holcomb (heath at bulah.com)
> >> # Ned Ludd (embedded Gentoo project lead,
> original commands posted)
> >> # Lloyd Sargent (contributor)
> >> # Yuri Vasilevshi (contributor)
> >
> > It's Vasilevski :-)
> >
> >> # Mike George (contributor)
> >> # Kammi Cazze (contributor)
> >> # Marius Schaefer (contributor)
> >> #
> >> # Definitions and Terms
> >> # system_rootfs = your regular rootfs
> >> # development_rootfs = what you use to build the
> embedded_rootfs
> >> # embedded_rootfs = rootfs you deploy to the
> target system
> >> # SBC = single board computer (here it's an x86
> based)
> >> #
> >> # References
> >> # http://www.gentoo.org/doc/en/handbook/index.xml
> >> # http://www.epiawiki.org
> >> # http://epia.kalf.org
> >> # Gentoo embedded mailing list
> (gentoo-embedded@l.g.o)
> >> #
> >> #
> >> # Overview of process (steps)
> >> # 1 - Prepare the development_rootfs from your
> system_rootfs
> >> # 2 - Build the development_rootfs
> >> # 3 - Build the embedded_rootfs
> >> # 4 - Build and install non-system programs to
> the embedded_rootfs
> >> # 5 - Build and install a kernel to the
> embedded_rootfs
> >> # 6 - Deploy embedded_rootfs to target
> >> #
> >>
>
#--------------------------------------------------------------------------------
> >>
> >> #----- Step 1 - Prepare the development_rootfs
> from your system_rootfs -------
> >>
> >> # You must be root.
> >> su -
> >>
> >> # Create the development_rootfs.
> >> # I use i586 because of target is a Geode
> processor.
> >> mkdir -p
> /opt/i586-gentoo-uclibc-linux/usr/portage
> >>
> >> # Download the latest stage 1 tarball.
> >> wget \
> >>
>
http://gentoo.osuosl.org/experimental/x86/embedded/stages/stage1-x86-uclibc-2005.0.tar.bz2
> >>
> >> # Untar the stage to the development_rootfs.
> >> tar -xvjf stage1-x86-uclibc-2005.0.tar.bz2 -C
> /opt/i586-gentoo-uclibc-linux/
> >
> > it should be tar -xvjpf ...
> > where -p stands for --preserve-permissions
> >
> >>
> >> # Mount the proc and portage directories to your
> development_rootfs.
> >> # Makes your system_rootfs's proc and portage
> directory available from inside
> >> # of your development_rootfs (after chrooting).
> >> mount --bind /proc
> /opt/i586-gentoo-uclibc-linux/proc/
> >> mount --bind /usr/portage
> /opt/i586-gentoo-uclibc-linux/usr/portage
> >>
> >> # Copy over DNS information to the
> development_rootfs.
> >> cp /etc/resolv.conf
> /opt/i586-gentoo-uclibc-linux/etc/resolv.conf
> >>
> >> # Chroot into the development_rootfs.
> >> chroot /opt/i586-gentoo-uclibc-linux /bin/bash
> --login
> >>
> >>
> >> #----- Step 2 - Build the development_rootfs
> ---------------------------------
> >>
> >> # Create new environment and load variables into
> memory.
> >> env-update
> >> source /etc/profile
> >>
> >> # Modify make.conf file to your liking/needs.
> >> nano -w /etc/make.conf
> >> # This is for my target, Geode x86 processor.
> >> /*
> >> USE="bitmap-fonts minimal truetype-fonts uclibc
> mmx"
> >
> > The uclibc USE flag was obsoleted, see:
> >
>
http://www.mail-archive.com/gentoo-embedded@l.g.o/msg00140.html
> >
> >> CHOST="i586-gentoo-linux-uclibc"
> >> CFLAGS="-march=i586 -Os -pipe
> -fomit-frame-pointer -mmmx"
> >> CXXFLAGS="${CFLAGS}"
> >> FEATURES="buildpkg"
> >>
> >> VIDEO_CARDS="chips"
> >> UCLIBC_CPU="586MMX"
> >> */
> >>
> >> # Set profile to use 2.6 kernel.
> >> # The current stage uses 2.4 by default, and for
> most cases you are going
> >> # to want a 2.6.x kernel.
> >> rm /etc/make.profile
> >
> > This are equivalent but I would use:
> > unlink /etc/make.profile
> > for clarity's sake.
> >
> >> ln -s /usr/portage/profiles/uclibc/x86
> /etc/make.profile
>
=== message truncated ===


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