RE: [gentoo-embedded] x86 SBC Gentoo Embedded HowTo version 0.03 (unfinished)

[Kammi Cazze]

Hi,

first of all i like your id of putting such a howto up. I hope you will get 
much help from the devs. I think the problem is that this project is in full 
development and ways of accompishing things here vary very quickly and are 
always made better and easier to do.

Here is some stuff you could put into it, because it won't change alot in 
the feature ;)

- You could mention something about how to set the timezone on the uclibc 
box. There is a full expl. on this site: 
http://leaf.sourceforge.net/doc/guide/buci-tz.html

>ROOT=/Embedded RootFS emerge busybox uclibc

You could also put baselayout-lite in it. I don't know what the status is by 
now (ask iggy)!

As on such a system devfs or udef is mostly unwanted, you will have to 
create your /dev nodes manualy, because baselayout-lite only makes the most 
neaded once, like /dev/hd* and /dev/sd*


Pierre Cassimans

>From: Heath H Holcomb <heath@×××××.com>
>Reply-To: gentoo-embedded@l.g.o
>To: gentoo-embedded@l.g.o
>Subject: [gentoo-embedded] x86 SBC Gentoo Embedded HowTo version 0.03
>(unfinished)
>Date: Fri, 29 Apr 2005 08:49:21 -0500
>
>Version 0.03
>Please add, delete, modify. Thanks!
>
>
>#---------------------------------------------------------------------------------------
># Embedded Gentoo How-To for x86
>#
># Commands to setup a Gentoo embedded environment, you must be root.
># These commands are to be run on your developement system,
># any x86 Gentoo Linux computer will do.  The system should be fast,
># to speed developement.  The target can be any x86 based SBC.  I'm
># using a Geode based SBC.  Latter I'll use a Via based SBC.
>#
># version 0.03
># 2005.29.04
>#
># Heath Holcomb (heath at bulah.com)
># Ned Ludd (original commands posted)
># Yuri Vasilevshi (contributor)
># Mike George (contributor)
>#
># 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)
>#
>#
>#---------------------------------------------------------------------------------------
>
># create the Development RootFS
># I use i586 becasue 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/
>
># mount the Development RootFS proc and portage directories
># don't understand this someone please add comments
>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, create new environment, load
>variables
>into memory
>chroot /opt/i586-gentoo-uclibc-linux /bin/bash --login
>env-update
>source /etc/profile
>
># modify make.conf file to your liking
>nano -w /etc/make.conf
># this is for my target, Geode x86 processor
>CHOST="i586-gentoo-linux-uclibc"
>CFLAGS="-march=i586 -Os -pipe -fomit-frame-pointer -mmmx"
>CXXFLAGS="${CFLAGS}"
>FEATURES="buildpkg"
>
># work around for bug 90306
>mknod -m 0444 /dev/random c 1 8
>mknod -m 0444 /dev/urandom c 1 9
>
># start the bootstrip script
>cd /usr/portage/scripts
>./bootstrap.sh -p -v
>./bootstrap.sh
>
># emerge system
>emerge -e system
># fixes a emerge ebuild bug, this should go away soon
>emerge python
># continue with the rest of the emerge system
>emerge -e system
>
># modify make.conf and set you USE flags for the target embedded build
># these use flags build a smaller system with no documentation, man or info
>pages installed
># the make-symlinks option of for busybox to automatically create the
>symlinks
>to it
>nano -w /etc/make.conf
>USE="make-symlinks nodoc noinfo noman"
>
># build busybox and uclibc, put into the Embedded RootFS (/Embedded RootFS)
># don't understand exactally how this works, someone please add comments
>mkdir /Embedded RootFS
>ROOT=/Embedded RootFS emerge busybox uclibc
>
># emerge other software you need for you embedded target
>ROOT=/Embedded RootFS emerge xxxxxxxxx
>
># install a kernel into Embedded RootFS
>ROOT=/Embedded RootFS emerge vanilla-sources
>cd /Embedded RootFS/usr/src
>ln -s linux-
>
>......... more stuff here ...........
>......... install xorg-x11, less than 10MB hopefully
>......... install light window manager (blackbox, windowmaker, ???)
>......... install very light X11 toolkit (?????)
>......... purge to the Embedded RootFS of unwanted files and libaries
>......... edit all config files
>......... set up the test harddrive on the target SBC
>......... install grub or lilo on the test harddrive on the target SBC
>......... transfer Embedded RootFS to the test harddrive on the target SBC
>......... debug system, and rebuild
>......... deploy Embedded RootFS from the test harddrive to flash
>......... (DiskOnChip, Compact Flash)
>......... tweak, rebuild, redeploy
>
>--
>Heath Holcomb
>heath@×××××.com
>www.bulah.com
>--
>gentoo-embedded@g.o mailing list
>

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