[pacman-dev] [PATCH] Introduce destarch keyword into makepkg

[Thomas Bächler]

Allan McRae schrieb:
> Just getting an indication of how common this is.  The multilib stuff in 
> [community] all takes the i686 package as the source and just moves the 
> files to the new locations.  Is there some reason that you cannot use 
> that approach.  Wouldn't all packages you are wanting to make a multilib 
> package for have an i686 package floating about.  Also, with that 
> approach you can actually make the package on the target architecture. 

The approach taken in community doesn't work very well, as putting a 
library package into a different path poses problems. Just one example: 
glibc has the path /usr/lib/gconv hardcoded, now we load the 32 bit 
glibc on a 64 bit system and it tries to load the modules from 
/usr/lib/gconv, all of which are 64 bit binaries, thus incompatible. 
Similar problems exist for alsa-lib, pango, gtk and maybe others. In the 
community/AUR packages, these are worked around by environment variables 
where possible, but in most cases they are just being ignored.

Thus I started to look into rebuilding all packages required on a 32 bit 
system, adjusting the paths correctly and stripping all unnecessary 
files. This is supposed to be a _clean_ and slim 32 bit runtime without 
a build environment. Right now I got enough libraries to make 
nspluginwrapper (built from source!) and flashplugin work.

My goal for now is to get nspluginwrapper+flash and wine to work on a 64 
bit archlinux system. Maybe later I want to add all libraries necessary 
to install and run Google Earth.

This task motivated the destarch=, STRIP_DIRS and rundepends suggestions 
I posted: In my PKGBUILDs, I would then use

arch=('i686')
destarch='x86_64'
makedepends=('glibc' 'foo')
rundepends=('glibc-32bit' 'foo-32bit')

to "cross-compile" the packages on my full arch32 system. I hope this 
clarifies my wishes.

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