configure: Improve Xen autodetection for hosts without Xen
commit50ced5b3b108aba7f9b2c8e6f7de4e924f30f83b
authorStefan Weil <sw@weilnetz.de>
Sat, 17 Dec 2011 08:27:39 +0000 (17 09:27 +0100)
committerStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Mon, 19 Dec 2011 11:03:43 +0000 (19 11:03 +0000)
tree4a5c68806d81a892a8f1f8cff33c02020db03d8d
parent84972cbb06046ad7b60e9c388509b9b96fa0510d
configure: Improve Xen autodetection for hosts without Xen

With this patch, it only takes one test (instead of four)
to detect that there is no Xen support at all.

For most build hosts, this will reduce the time configure needs.
It will also reduce noisy output in config.log.

Build hosts with Xen now need up to five (instead of up to four)
tests. They get improved diagnostics when Xen support fails.

Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
configure