Re: [Xen-devel] [libvirt] [PATCH RFC] libxl: fix paths in capability string

[Eric Blake <eblake@xxxxxxxxxx>]

On 01/06/2015 09:12 AM, Wei Liu wrote:
> Currently libxl driver hardcodes some paths in its capability string,
> which might not be the correct paths.
> 
> This patch introduces --with-libxl-prefix, so that user can specify the
> prefix used to build Xen tools. The default value is /usr/local which is
> the default --prefix for Xen tools.

Why can't you just make '--with-libxl=/path/to/alt' work?  That is,
--with-libxl=yes uses a default (which matches the prefix where LIBVIRT
will be installed [1]), --with-libxl=no turns it off, and specifying a
path says to use that path.  Then you don't need to add a new option.

[1] The assumption generally is that whoever is building libvirt has
also built libxl to be installed in the same location - which is a nicer
default than hard-coding a /usr/local default that libxl uses in
isolation. Of course, libvirt also defaults to /usr/local in isolation,
so if you don't specify anything at all, then ./configure will see that
libvirt is going into /usr/local and will therefore default to looking
for libxl also in /usr/local; but for a distro packager, it is nicer to
have the mere specification of --prefix switch all other relative
defaults to play nicely with everything else in the distro.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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