[Buildroot] Analysis of build results for 2016-08-09

[Yann E. MORIN <yann.morin.1998@free.fr>]

Alistair, Thomas, All,

[please, trim the message to only quote the parts you are replying to,
next time. ;-) ]

On 2016-08-10 22:21 +0000, Alistair Francis spake thusly:
> From: Thomas Petazzoni [mailto:thomas.petazzoni at free-electrons.com]
[--SNIP--]
> > >      aarch64 |                      xen-4.6.0 | NOK |
> > http://autobuild.buildroot.net/results/17641484cb1c2648fcc76e1d1733c71d4
> > 7025ed5/
> >
> > Python issue. Alistair, since you added the Xen package, could you have
> > a look?
> 
> Yep, looks like Xen doesn't support Python 3 yet. Is there a way to use Python 2 in build root?

Yes, just add (host-python is python2; host-python3 is, well, python3):

    XEN_DEPENDENCIES = host-python

Then it depends.

If Xen can be told what python to use, then that's easy (e.g.:
--with-python=python2 or whatever else...)

However, if you can't tell Xen what python to use, then this is a bit
more involved.

See how it was solved for example for qt5webkit:

    package/qt5webkit: needs host-python

    The Qt5Webkit build system hard-codes calls to 'python', but only really
    supports python2.

    We fix that similarly as we did in nodejs, by adding a python->python2
    symlink early in the PATH when configuring/building Qt5Webkit, and
    adding host-python in the dependency list.

    [--SNIP--]

This is commit ac16793eaaabfced0312420759e3a66cdaa1ea8e and you can get
some inspiration from it.

Thomas, we now have a few packages that need this hack. Should we try to
move those hacks into the pkg infra (obviously not for 2016.08)?

Cordialement,
Yann E. MORIN.

> Xen 4.7 has the same problem as well.
> 
> Thanks,
> 
> Alistair
> 
> >
> > >         i586 |                 xfsprogs-4.7.0 | NOK |
> > http://autobuild.buildroot.net/results/366ac68fff498576cc6bbc2ef396e9cb51
> > 37c01d/
> >
> > Musl issue.
> >
> > >      aarch64 |     xserver_xorg-server-1.18.4 | NOK |
> > http://autobuild.buildroot.net/results/26decc6b98fe35733dc6be95f6c6ba302
> > 8fddc1d/
> > >       x86_64 |     xserver_xorg-server-1.18.4 | NOK |
> > http://autobuild.buildroot.net/results/144e0be1a9aa7d2f00b535c8266052ee
> > db91bddb/
> >
> > Let's assume this might be fixed by
> > https://git.buildroot.org/buildroot/commit/?id=3686101a2ae9ec37b4d34a36
> > 8db03c325f7f92e3.
> >
> > Best regards,
> >
> > Thomas
> > --
> > Thomas Petazzoni, CTO, Free Electrons
> > Embedded Linux and Kernel engineering
> > http://free-electrons.com
> 
> 
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