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

[Ned Ludd]

[snip]

> > make-symlinks is a feature intended for people that are cross compiling
> > only. If you can run the native binarys which you can cuz it's x86 based
> > then you should consider doing something like so.
> >
> > chroot /opt/i586-pc-linux-uclibc /bin/bash --login
> >
> > ROOT=/dev/shm/rootfs
> > mount -obind /proc/ ${ROOT}/proc/
> > chroot ${ROOT} /bin/busybox --install -s
> > umount ${ROOT}/proc
>
> Should I not use busybox?  I don't understand why I should not use the use
> flag "make-symlinks" for busybox.  If I emerge busybox without the that use
> flag it don't create the smylinks for all the commands, it only install the
> binary busybox.

This is what I mean.
Notice how you only got the symlinks in your development environment vs
all the ones the busybox supports your embedded rootfs run-time
environment ? chrooting into your rootfs at some point and running the
above command helps because ensure you have a symlink for every given
applet the busybox was built to support.

> > > # 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
> >
> > Being that you already enabled FEATURES=buildpkg there is no point in
> > building xxxxxxx again. Simply use "emerge -K" at this point.
>
> Do you mean that I should emerge mplayer (for example) in my development
> rootfs (with buildpkq use flag), and just emerge -k mplayer into my embedded
> rootfs?

Yes you want to really only install your built packages into the rootfs
vs building your packages in it to ensure no extra cruft is left behind.
Thats why I noted the -K vs -k flags.


> > > # install a kernel into Embedded RootFS
> > > ROOT=/Embedded RootFS emerge vanilla-sources
> > > cd /Embedded RootFS/usr/src
> > > ln -s linux-
> >
> > No this is wrong.
> >
> > Your kernel building for native-* should be in
> > /opt/i586-pc-linux-uclibc/usr/src/linux
> > vs
> > /opt/i586-pc-linux-uclibc/"Embedded RootFS"
>
> Ok, I understand.  Emerge, configure, and make the kernel in the development
> rootfs and this copy it to my embedded rootfs boot directory.

correct.

-- 
Ned Ludd <solar@g.o>

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