[PATCH v4 1/2] kvm-unit-tests: configure changes for illumos.

[Dan Cross <cross@oxidecomputer.com>]

Warn, don't fail, if the check for `getopt -T` fails in the `configure`
script.

Aside from this check, `configure` does not use `getopt`, so don't
fail to run if `getopt -T` doesn't indicate support for  the extended
Linux version.  Getopt is only used in `run_tests.sh`, which tests for
extended getopt anyway, but emit a warning here.

Signed-off-by: Dan Cross <cross@oxidecomputer.com>
---
 configure | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 23085da..5b7daac 100755
--- a/configure
+++ b/configure
@@ -318,11 +318,11 @@ EOF
   rm -f lib-test.{o,S}
 fi
 
-# require enhanced getopt
+# warn if enhanced getopt is unavailable
 getopt -T > /dev/null
 if [ $? -ne 4 ]; then
-    echo "Enhanced getopt is not available, add it to your PATH?"
-    exit 1
+    echo "Without enhanced getopt you won't be able to use run_tests.sh."
+    echo "Add it to your PATH?"
 fi
 
 # Are we in a separate build tree? If so, link the Makefile
-- 
2.36.1