Re: [Xen-devel] Re: [PATCH] ioemu: Fixes for build/install system

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Christoph Egger writes ("Re: [Xen-devel] Re: [PATCH] ioemu: Fixes for 
build/install system"):
> On Tuesday 05 May 2009 16:00:12 Ian Jackson wrote:
> > Could you please do this in xen-setup-* instead, rather than in
> > xen-unstable's Makefiles ?  That (a) avoids coupling between the two
> > repositories and (b) will mean that xen-setup will do the right thing 
> > when run by hand.
> 
> I tried, but it doesn't work. It has to be set _before_ xen-setup* is called
> for the same reason XEN_ROOT is set in xen-unstable's Makefiles.

I don't understand, I'm afraid.

XEN_ROOT needs to be handled the way it is because it's (a) available
only as a make variable in the xen-unstable makefiles and (b) is a
relative pathname so needs to be massaged for use by a sub-component.
If you run xen-setup it guesses a value for XEN_ROOT which is right
for at least one common case.

PREFIX could be set in the environment perfectly well and doesn't need
any massaging.  You could just have xen-setup invent a default PREFIX
if none was found in its environment.

Ian.

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