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configure: Improve Xen autodetection for hosts without Xen

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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>
This commit is contained in:
Stefan Weil 2011-12-17 09:27:39 +01:00 committed by Stefan Hajnoczi
parent 84972cbb06
commit 50ced5b3b1
1 changed files with 25 additions and 4 deletions
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27
configure vendored
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@ -1317,7 +1317,27 @@ fi
if test "$xen" != "no" ; then
xen_libs="-lxenstore -lxenctrl -lxenguest"
# First we test whether Xen headers and libraries are available.
# If no, we are done and there is no Xen support.
# If yes, more tests are run to detect the Xen version.
# Xen (any)
cat > $TMPC <<EOF
#include <xenctrl.h>
#include <xs.h>
int main(void) {
return 0;
}
EOF
if ! compile_prog "" "$xen_libs" ; then
# Xen not found
if test "$xen" = "yes" ; then
feature_not_found "xen"
fi
xen=no
# Xen unstable
elif (
cat > $TMPC <<EOF
#include <xenctrl.h>
#include <xs.h>
@ -1336,7 +1356,8 @@ int main(void) {
return 0;
}
EOF
if compile_prog "" "$xen_libs" ; then
compile_prog "" "$xen_libs"
) ; then
xen_ctrl_version=410
xen=yes
@ -1407,10 +1428,10 @@ EOF
xen_ctrl_version=330
xen=yes
# Xen not found or unsupported
# Xen version unsupported
else
if test "$xen" = "yes" ; then
feature_not_found "xen"
feature_not_found "xen (unsupported version)"
fi
xen=no
fi