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Sharing "compiling power" between machines ?
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Gabriel_Blake
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Joined: 16 Sep 2007
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PostPosted: Mon Jan 21, 2013 11:51 pm    Post subject: Sharing "compiling power" between machines ? Reply with quote

Hi.

I have a Raspberry Pi and I want to use Gentoo on it. I see two options and both seem impractical:

- compiling packages on the ARM (takes time)
- cross compiling on desktop Gentoo (annoying upload every time emerge something)

So I was thinking about two solutions:

- share the processing resources of my desktop over the network so the Pi can use it for compilation
- synching (in background, fast, automatic) between the cross-compiled binaries on the desktop and the Pi

Any other solutions, ideas ?
If any of these are good and easy to implement, could you give me any hings on where to start ?

Or maybe a binary distro for the ARMv6 ? Arch ? (please not Debian)




PS if the forum section is inappropriate, please move the topic
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The Doctor
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Joined: 27 Jul 2010
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PostPosted: Tue Jan 22, 2013 12:21 am    Post subject: Reply with quote

I would do something like this:

script on Pi that calls $DESKTOP to build package using cross compile. Script handles all the details via ssh using public key authentication, or something. Once emerge completes, the binary is stored to a shared partition (samba, nfs, or somthing) and same script then installs the package on $PI. That way you use Gentoo, but everything is abstracted.

I wouldn't say Arch is not particularly reliable. I just had an update kill my shadow files. Honestly, the problem was NOT between the keyboard and the chair with that one.

Some script hints to get you going. I would call it compile.sh, just because.

Code:
#!/bin/bash
#log into compiling computer

echo "Starting login"
ssh <non-root user>@<some static ip>

echo "starting build"
# build package. Assume it is called 'xmerge'
sudo xmerge $1

# logout

echo "Build finished"
exit

echo "installing $1"
#install binary
sudo emerge -vg $1



And there you go! A simple emerge with only 1 command and also only 1 or 2 entries of your password depending on how you configure ssh.

For updates, you can do something similar, but first you need to process the output of emerge -quND world on your deivice (replace [ebuild ....] with =)
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Jaglover
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Location: Saint Amant, Acadiana

PostPosted: Tue Jan 22, 2013 12:28 am    Post subject: Reply with quote

Maybe I'm missing something, but why can't you use portage buildpkg feature?
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Gabriel_Blake
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PostPosted: Tue Jan 22, 2013 1:40 am    Post subject: Reply with quote

Jaglover wrote:
Maybe I'm missing something, but why can't you use portage buildpkg feature?


Maybe because I've never used it and I don't know what it is :) I'll look into it. Thanks :)



:arrow: The Doctor
Thanks :) It's a bit complex, but I'll consider it :)
btw... Does Tardis run on Gentoo ? xD
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NotQuiteSane
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Location: Klamath Falls, Jefferson, USA, North America, Midgarth

PostPosted: Tue Jan 22, 2013 7:48 am    Post subject: Re: Sharing "compiling power" between machines ? Reply with quote

Gabriel_Blake wrote:
- share the processing resources of my desktop over the network so the Pi can use it for compilation
- synching (in background, fast, automatic) between the cross-compiled binaries on the desktop and the Pi


You want this and this.

NQS
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