Re: [Xen-devel] [PATCH] Attempt to build xen-unstable on Ubuntu 9.04 Server (Ubuntu Desktop installed)

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Keir Fraser writes ("Re: [Xen-devel] [PATCH] Attempt to build xen-unstable on 
Ubuntu 9.04 Server (Ubuntu Desktop installed)"):
> On 07/05/2009 14:15, "Alex Zeffertt" <alex.zeffertt@xxxxxxxxxxxxx> wrote:
> > This patch appears to fix the problem.  Just don't use --prefix.  It
> > doesn't seem to make any difference for python2.5, but it installs to
> > the correct place under python 2.6.
> 
> Wouldn't it be correct to specify --prefix (even if that means installing to
> blah/site-packages) if the user has overridden prefix to make a personal
> installation avoiding conflicting with distro packages? Otherwise PREFIX
> allows a user to install Xen bits somewhere out of the way, except the
> Python bits which will still blat the default install path.

Quite so.

> Perhaps config/*.mk should define DEFAULT_PREFIX and PREFIX, and we omit
> --prefix= to Python installer if the two are equal?

That would be one way to do it but sadly it's not sufficient.  On
pre-jaunty Ubuntu systems (and many others), omitting --prefix puts
everything in /usr which is also wrong.

I think the right answer is to provide a way to suppress the --prefix
explicitly.  That will provide a workaround to people with the broken
python setup, without making things go wrong for anyone else.

Ian.

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