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Date: Mon, 22 Jul 2013 08:27:56 -0400
From: Andrew Bradford <andrew@...dfordembedded.com>
To: musl@...ts.openwall.com
Subject: Re: embedded newbies site.
On Sat, Jul 20, 2013, at 11:17 AM, James B wrote:
> On Tue, Jul 16, 2013 at 10:18 AM, Strake <strake888@...il.com> wrote:
>
> > On 15/07/2013, Rob Landley <rob@...dley.net> wrote:
> > > - creating a development environment (building binutils, gcc,
> > > make...)
> > > - requirements for self-hosting
> > > - requirements for natively building Linux From Scratch
> > > - cross vs native compiling
> > > - bootstrapping to native compiling under emulation.
> >
> > This. For me, at least, this is often the greatest hindrance.
> >
> > That makes two of us. There are many tools for making cross compiler
> (aboriginal, crosstools-ng, buildroot, etc) but I haven't found one that
> guides how to move to native compiling (=create the native compilers)
> once
> one has the cross-compilers and bootable rootfs (I know, aboriginal
> *does*
> create native compilers so I should read Rob's scripts for that ...).
>
> That being said, the other topics are pretty relevant too.
>
> Also, anyone thinks that CLFS is good start for this? One thing that I
> notice about (C)LFS is that the steps are there but the rationale and
> explanation isn't; so it encourages people to follow a recipe without
> knowing *why* things have to be done in a certain way (to be fair, the
> main
> LFS (not its CLFS variants) does have some kind of explanation but it
> could
> be improved).
I'm currently one of the only developers currently working on the CLFS
Embedded book [1]. I'd happily take patches to describe why things work
they way they do and why the steps are what they are. The biggest
hindrance the CLFS embedded book has is a lack of both developer time
and experience, the main core people who started the embedded book
haven't contributed much in the past few years I assume due to other
commitments.
[1]:http://cross-lfs.org/view/clfs-embedded/
We're (2 or 3 of us) currently in the middle of a bunch of discussions
on #cross-lfs IRC and scattered around clfs-dev ml regarding moving from
uClibc to something else. I tried some builds with glibc and realized
that's not really a decent choice, even today. I got pointed to musl by
rofl0r on Github (sorry, don't know their real name). We're now working
though coming up to speed on musl and learning how to build it such that
we can consider it for use on MIPS, x86 and ARM for the book [2].
[2]:http://lists.cross-lfs.org/pipermail/clfs-dev-cross-lfs.org/2013-July/001517.html
If the CLFS embedded book is a good starting point, please feel free to
send patches, I'm happy to take them. Although based on reading through
the archive it looks like the real goal is bigger than what CLFS
embedded's real goals are: like talking about jtags, emulated
bootstraps, native compilers, etc.
If CLFS embedded isn't the right place to start, maybe deprecating the
CLFS embedded book and moving to the proposed wiki would be something to
consider? Especially if the developer time / experience is higher and
if the final product would cover more of the "why" and not just the
steps. I'd be happy to contribute to such a resource where I can.
Thanks,
Andrew
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