Fedora-based cross compilation environment available....

[Brendan Conoboy]

Several months ago I mentioned that Red Hat had a cross build 
environment which generates embedded root filesystems using Fedora 
source rpms.  Today we are making it available.  It is rough around the 
edges, but functional.  If people express an interest in it we will see 
about putting it on Fedora hosted and have future development take place 
there.  All the bits are on the GES FTP server:

ftp://ftp.ges.redhat.com/private/releng/arm-linux-beta

The cross build environment is called 'rpmbuildroot'.  This is the 
package you are looking for.  Jump into the docs directory for 
information on how to get started (skip the top level README).

For the last while the focus has been on the Nokia N770, so you will 
find that is what the environment is configured for.  There are also 
some mips and am33 patches in there (rpmbuildroot is target arch 
independent), but they are unlikely to be valid for any modern Fedora 
version.

The FTP server also hosts the cross compiler toolchain that rpmbuildroot 
is known to work with.  The binary rpm was built on RHEL5, but should 
work on any modern Fedora release.

Current rpmbuildroot caveats:

1. x86_64 support is not included.  It only runs on i686 hosts.  This 
may or may not resolve with setarch.  Certainly it won't take much work 
to get running on x86_64.

2. The package list is currently against Fedora 7.  Moving to 8 or 
rawhide is relatively straightforward, but takes a little time for each 
package update.

3. The latest version of mock does not work with rpmbuildroot.  We 
include a version that does work.

Let me know if you have any questions or comments.  I didn't do the 
engineering work for this, but as a test hamster, have been able to run 
'make' successfully so I might be able to answer them.

Have fun,

-- 
Brendan Conoboy / Red Hat, Inc. / blc(a)redhat.com

[David Woodhouse]

On Mon, 2008-03-10 at 11:13 -0600, Brendan Conoboy wrote:
>  The FTP server also hosts the cross compiler toolchain that
> rpmbuildroot 
>  is known to work with.  The binary rpm was built on RHEL5, but should 
>  work on any modern Fedora release. 
We really ought to work on getting cross-toolchains into Fedora.

>  1. x86_64 support is not included.  It only runs on i686 hosts.  This
>
>  may or may not resolve with setarch.  Certainly it won't take much work 
>  to get running on x86_64. 
And PPC?

-- 
dwmw2

[Lennert Buytenhek]

On Mon, Mar 10, 2008 at 06:18:16PM +0100, David Woodhouse wrote:

>  > The FTP server also hosts the cross compiler toolchain that
> rpmbuildroot 
>  > is known to work with.  The binary rpm was built on RHEL5, but should 
>  > work on any modern Fedora release.
>  
>  We really ought to work on getting cross-toolchains into Fedora. 
I took your binutils-cross patch a while ago and added gcc/gdb
cross patches to come up with a way of building cross-toolchains
from Fedora sources:

	http://ftp.linux.org.uk/pub/linux/arm/fedora/cross/latest/


Wiki page detailing how to use this on ARM:

	http://fedoraproject.org/wiki/Architectures/ARM/CrossToolchain

[Brendan Conoboy]

David Woodhouse wrote:
> > 1. x86_64 support is not included.  It only runs on i686 hosts. 
> This 
> > may or may not resolve with setarch.  Certainly it won't take much work 
> > to get running on x86_64.
>  
>  And PPC? 
Might work out of the box.  The problem I see when building under x86_64 
is when building glibc, the spec file looks for libraries /usr/lib64 
when building for an arm target.  If PPC just uses /usr/lib, it may 
proceed normally.

-- 
Brendan Conoboy / Red Hat, Inc. / blc(a)redhat.com

[Brendan Conoboy]

Brendan Conoboy wrote:
>  Several months ago I mentioned that Red Hat had a cross build 
>  environment which generates embedded root filesystems using Fedora 
>  source rpms.  Today we are making it available. 
In the interests of spurring some discussion, I wanted to let you all 
know our current thinking on the future of rpmbuildroot and solicit some 
feedback.  Current todo/wish list:

1. Support the latest mock.

2. Compose rootfs with ancondo/livecd-tools instead of home-grown solution.

3. Go from bootstrap oriented to bootstrap capable/package oriented. 
Perhaps integrate with koji.

4. Track down x86_64 host failures.

5. It's been mentioned that it needs a better name- any suggestions?

-- 
Brendan Conoboy / Red Hat, Inc. / blc(a)redhat.com