RE: Cross compiling Ruby for MIPS on Debian
Hi Matt,
Thank you for your reply. My answers inline:
> -----Original Message-----
> From: Matthew Palmer [mailto:mpalmer@debian.org]
> Sent: Friday, October 17, 2008 5:35 PM
> To: debian-ruby@lists.debian.org
> Subject: Re: Cross compiling Ruby for MIPS on Debian
>
> On Fri, Oct 17, 2008 at 03:08:00PM -0400, Malhotra Ruchir-TGXH38
wrote:
> > I have installed Ruby version 1.8.5 using apt-get.
> >
> > Please guide me on how I can cross-compile this distribution for
MIPS
> > platform on Debian Linux.
>
> Are you going to be running Debian on the MIPS machine?
No. The MIPS machine will run open-source Linux.
Let me state my purpose more clearly: Before adding Ruby to the
pre-existing Make system for the MIPS-based platform that I have, I'm
trying to cross-compile and build Ruby on the Debian m/c in order to get
an approximation of the memory footprint.
Cross-compilation
> is a lot more than just spitting out different opcodes for a given
line of
> C; you've also got to match the ABI of your target platform, make sure
you
> link against the right sorts of libs, and so on.
>
> If you're not running Debian on the MIPS box, you're probably better
off
> talking to the people who develop the OS you're targetting, as they'll
> probably have cross-building environments available to do the
building.
>
> If you are running Debian on the MIPS box, then the first thing I'd
ask
> is:
> why can't you build Ruby on the machine itself?
I have done that already. And "irb" does work on my x86 workstation
running Debian.
Thanks,
Ruchir
If it's got enough
> RAM/CPU
> to run Debian acceptably, it'll almost certainly have enough grunt to
> (eventually) produce a Ruby build. For that, you don't need any
> cross-compilation tools, just a bit of knowledge of basic package
building
> tools, which you'd be best off getting from the debian-mentors list
> (http://lists.debian.org/debian-mentors -- read the FAQ before
posting!)
>
> Finally, if you're building for Debian MIPS but really can't bring
> yourself
> to build on the box, take a look at the emdebian project
> (http://www.emdebian.org/debian/), they've got cross-compilation
toolkits
> for all the usual suspects in their pool. Based on what I had to
install
> to
> build a kernel for armel last night, the packages you'd want to
install
> from
> that repo, at a minimum, are:
>
> libc6-mips-cross libc6-dev-mips-cross binutils-mips-linux-gnu gcc-4.3-
> mips-linux-gnu
>
> On top of that you'll need the dev versions of the other libraries you
> want
> to link against (libssl, for instance, if you want OpenSSL support in
your
> Ruby build); I'm not sure how to build all those. In general, you'll
get
> more and better info on cross-compiling something from the relevant
porter
> list than you will here.
>
> - Matt
>
>
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