Gentoo on Acer Aspire1, including binpkgs

About a month ago, I installed Gentoo on the new-to-me Acer Aspire1. Installation went like anything else, it is just a normal x86 host after all. I don’t have everything on it working, because I don’t care. If you are looking for additional resources on getting the extras working, you may want to look here or here.

The exciting part, that I got working and am ready to announce publicly, is my new atom-x86 binpkg repo. What makes this repo different than the binpkgs located on tinderbox.dev.gentoo.org/default-linux is that this repo has CFLAGS specific to the Intel Atom processor. I identified the compiler flags by using the following gcc command: gcc -Q --help=target -march=native and set the following -march=prescott -mtune=generic -msahf. On my linode (review) host, I have a chroot that builds all new packages in my world file once a day which comes from the aspire1. In this manor, I am able to always have binary packages available to me whenever I update my aspire1. Now, I have all the benefits of a source distro and the speed of a binary distro. :)

If you would like to use this repo, set PORTAGE_BINHOST in /etc/make.conf and add ‘getbinpkg’ to FEATURES (or use the emerge options directly). Be advised, that thought this works for me, I make no guarantees for you.

PORTAGE_BINHOST="http://tinderbox.jolexa.net/atom-x86/"
FEATURES="${FEATURES} getbinpkg"

I also have an html view of the packages available.

  1. Nice! I was thinking about putting Gentoo on my Aspire One. I was also worried about compilation on it. Now I will try to reuse your binary packages.

    Thanks!

  2. From a bit of experimenting I found that
    CFLAGS=”-march=core2 -mtune=generic -mfpmath=sse …” on GCC 4.4.2 (contrary to gcc -Q help…) gave the best performance.
    I have been running this on my HP mini 5101 for several months with great results.

    It is not hard to set up a chroot to build the Atom’s binpkgs, and I highly recommend it for anyone that runs ~x86 on one of these beasts as they do compile a bit slow.

    I have not found a way to binpkg the kernel (compiled in the chroot), so I just tar both the source and the outputed /boot and /lib/modules and scp them over, would be nice if that was done automatically. But then Gentoo does not like automating kernel stuff: after an emerge -u I just do a “make oldconfig && make -j3 all && make install modules_install && module-rebuild rebuild” edit grub, and I am ready to go, this could really be automated (but is off topic).

    Thanks for providing PORTAGE_BINHOST for those that can afford the bandwidth (/mutter against South African internet). You should, however, mention your USE flags, as they have to be the same for someone to use your bins.

    • Thanks for the CFLAG tip, unsure if I have motivation to change my setup but I will look. You know, maybe my chroot could build ~arch too, that way it would work for both arch and ~arch users.

      I will also look at how to express my USE flags to people. It should go somewhere in the html view. If you use the -G emerge option, it uses the remote packages regardless of USE flags. (Basically, you use what I have without choice). Otherwise, if USE do not match, it will compile what it needs to.

      • ~arch is a lot of packages to build every day (:
        My netbook with only 707 packages (143 in world) updates at least 5 every day and normally around 14.

        Apparently gcc 4.5 will have -march=atom, kernel 2.6.32 already has atom as a CPU target.

  3. As a nice little hack, the html view now shows emerge –info and make.conf. I’ll also get it to show package.* soon.

  4. What about the poulsbo driver ?

Leave a Reply