On 02/25/2010 11:16 PM, Nobuhiro Iwamatsu wrote:
Hi,
2010/2/16 Hector Oron<[email protected]>:
Those are good news. I think, correct me if I am wrong, cross compiler
you have built it is a bare metal compiler. In case you need a
compiler linked against eglibc, you can try to do it the way it is
explained at:
http://wiki.debian.org/EmdebianToolchain#Buildyourownfromsources
A long time ago I tested it, it was working fine for me, I can't
remember if by that time sh* architectures were in dpkg tables or I
had to add them locally.
I am short of time to work on this, but let me know if you have any
issues or if I can help either way.
I noticed it being slightly different from how to make of my cross compiler.
I intend to rebuild toolchain.
Thank you.
Best regards,
Nobuhiro
I was originally going to write this e-mail to Nobuhiro directly, but
since this discussion was started here on the Emdebian list I thought I
would start with an open letter in case some of the answers are of
interest to the wider Emdebian audience. Please let me know if and when
I should take this discussion off list, I don't want to cause undo chatter.
I am currently evaluating SH as a potential architecture for a project.
I would like to target a baked Emdebian as the distribution for this
project. This would be my first attempt at doing a full Emdebian
distro, and normally I would rather start with a known entity like
armel, but the processor choice may be dictated by other issues. I've
read and re-read this thread a few times, as well as much of Emdebian
list traffic over several recent months, and I have some questions.
From my understanding,
1. The Emdebian toolchain for SH can be built (in fact I have just built
the gcc-4.4 cross-compiler myself in Squeeze using this method
http://wiki.debian.org/EmdebianToolchain#Buildyourownfromsources).
There is some mention, however, in the notes on the Renesas site
(https://oss.renesas.com/modules/document/?Debian%20%2F%20SH4) that the
SH Debian distribution is being built with a special patch that makes it
binary incompatible with cross compilers.
"We have applied a patch concerning the _fpcr_value to eglic in
Debian/SH4 distribution. Note that eglic of Debian/SH4 is not
compatible with binary packages that were built with a cross
compiler, eglibc, or glibc included in other Debian distributions."
Would this mean that code compiled with an Emdebian built cross compiler
will be incompatible with packages that are available in the Debian
ports mirror, and/or also those that have been built on the Emdebian
grip server?
2. I realize from reading the thread that there is no testing or testing
migration support for SH, since it is still a Debian "port" architecture
and not yet on the official Debian server. I'm also trying to
understand the issues with reprepro and the other tools used to work
with Emdebian. I also understand that this is very unlikely to be
rectified for SH in the Squeeze time-frame. Does this then mean that if
one were going to try to release a system based on SH and Squeeze, that
it would only work if one were to create their own private Grip mirror
for SH at some given point so that they could cut off the of updates to
the packages at about the time that Squeeze is released? In other
words, will the fact that the ports mirror only supports unstable mean
that it will continue to process updates for a Squeeze distribution
beyond Squeeze's freeze?
Am I correct in assuming that this method would also make it very hard
to pickup any updates whatsoever, since it would be very hard to
manually feed those updates to reprepro? Sorry I have tried reprepro in
the past, but I am nothing of an expert in its nuanced use. I do
remember it was hard to get certain manual operations to occur smoothly
(at least in the Etch era when I last used it).
One other thought that occurred to me is that I could use reprepro to
pull a private source only repository of just the packages I want in my
distribution based on Squeeze testing (and eventually stable) and then
setup my own private autobuilder network to build those packages. Does
autobuilder only support native building, or is there a way to setup to
use an Emdebian cross compiler environment to build packages?
Thanks in advance for any help,
-Jim Heck
