[arch-general] Howto setup i686 archroot on x86_64 box? (not linux32 chroot)

[David C. Rankin]

On 01/25/2014 12:25 AM, David C. Rankin wrote:
> All,
> 
>   I have built all x86_64 packages in an archroot on my x86_64 box. I would like
> to set up and i686 archroot on the same box to build the i686 packages on the
> same box due to build times dropping from about 8 hours on i686 to less than 3
> on the x86_64 box. I am unclear how best to do it -- or if it is doable.
> 
>   I've read https://wiki.archlinux.org/index.php/Arch64_FAQ about multilib with
> ~/.makepkg.i686.conf and a true linux32 chroot setup, but none of those are
> specific to the archroot setup. Both seem like they would work, but don't know
> if they are the right choice for build the 110 packages TDE requires. I would
> like to do this in an archroot if possible.
> 
>   I use the "Classic Way" of handling the build specified in
> https://wiki.archlinux.org/index.php/DeveloperWiki:Building_in_a_Clean_Chroot.
> All dependency packages are installed in the rw layer of the chroot with the
> first package built, a [local] repo is created under $CHROOT/root/repo, and as
> packages are built, they are installed, the resulting package is copied to
> $CHROOT/root/repo, and the repo index is updated with repo-add, and the process
> repeats with the next package until the build of TDE is complete. (that chroot
> is usually used to finish and tweaks needed for that set of package, then
> deleted and a new archroot created for the next major set of updates)
> 
>   It seems like setting up another archroot, and installing multilib would allow
> an archroot to work, but how would you tell makechrootpkg to build the i686
> version instead of the x86_64 version. I don't want to have to modify the
> PKGBUILDs or do a significant re-write of the build script that automates the
> build, but if it is as simple as changing the makechrootpkg call, that would be
> a simple config-file fix.
> 
>   How best to handle this? (or just use the old i686 box and run it overnight?)
> 

  I've found:
https://wiki.archlinux.org/index.php/Building_32-bit_packages_on_a_64-bit_system. I'll
setup another chroot configured as suggested and build as usual in the i686
chroot. If there are any additional pointers of gotchas, please let me know. Thanks.

-- 
David C. Rankin, J.D.,P.E.