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On Tuesday 21 Feb 2017 00:22:51 Neil Bothwick wrote: |
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> On Mon, 20 Feb 2017 18:34:47 -0500, Walter Dnes wrote: |
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> > Reading https://wiki.gentoo.org/wiki/Binary_package_guide still leaves |
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> > |
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> > me uncertain. I have an ancient 32-bit Atom netbook. I've installed |
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> > uclibc-ng Gentoo on it. Building big packages on it is a pain. I can |
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> > do an identical install in a QEMU VM, and distcc into it. But that |
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> > doesn't catch all compiling work. |
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> > |
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> > What I'd like to do is build binaries in a chroot on my desktop, |
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> > |
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> > assuming a 32-bit uclibc-ng chroot on a 64-bit glibc host is possible. |
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> > Because the cpus are different, I would need to use different CFLAGS |
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> > (and CXXFLAGS) variables for when the host updates its own files, versus |
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> > when it builds files for the netbook. |
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> |
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> If the chroot is identical to your netbooks's install in terms of |
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> *FLAGS, USE, @world etc, then yes. I used to do it this way when I had an |
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> Atom netbook. I even build for a low memory 486 system in the same way. |
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You'll need to run in 32bit mode when chrooting of course: |
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linux32 chroot /mnt/Atom_Build_env /bin/bash |
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source /etc/profile |
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export PS1="(Atom_Build) $PS1" |
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> > Finally, is it possible for the client (the netbook) to notify the |
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> > |
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> > host that it needs certain packages built? I plan to run with |
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> > "--getbinpkgonly" on the netbook. |
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> |
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> You don't need to if the systems are the same. Set both systems to use |
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> the same $PKGDIR, set FEATURES=buildpkg in the chroot and do a world |
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> update. Then do the same update on the netbook but with -K. |
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> |
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> I used a script to control this that basically synced world and most |
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> of /etc/portage before entering the chroot, although I later switched to |
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> using containers as they make life so much easier. |
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> |
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> Oh, and you don't need a package server, just export PKGDIR via NFS and |
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> mount it on the netbook. |
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Or, if you can't be bothered with the extra work to set up NFS, copy the |
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contents of the PKGDIR from the chroot'ed system to the Atom after you |
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finished building all the chroot'ed binary packages, then emerge world in the |
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Atom. |
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-- |
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Regards, |
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Mick |
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