Unfortunately, adding a PPA is likely one of the last steps in enabling
a new architecture, as it requires that architecture to be fully
supported in Ubuntu, and have working virtualisation.
So, based on ports that have appeared in the past, the following things
seem to need to happen in order for it to be done.
1) Someone needs to be maintaining an Ubuntu kernel for the architecture (using
all the Ubuntu sauce, etc.)
2) Someone needs to be actively maintaining the Ubuntu toolchain to ensure it
works on that architecture
3) Someone needs to have bootstrapped a good chunk of the archive (Ubuntu
Desktop is often the first target)
4) The architecture needs to be supported in Debian (although compiler
defaults, etc. may differ)
5) There need to be a sufficient set of folks willing to test on that
architecture
Once all those conditions are met, it's mostly a matter of getting
trusted buildds into the Canonical data centre. I don't know the
precise procedure for that, but I'd guess that if the 5 conditions above
were met, and hardware was available, one might start by making a
request to rt.ubuntu.com. Note that this may take a long time to get a
response, as there are many more time-critical tasks that the folk who
process the RTs need to do.
All that said, I'll note that someone had a working toolchain port
for Intrepid, so it's not infeasible to do something.
--
ubuntu for mipsel
https://bugs.launchpad.net/bugs/605694
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