Running iotests is not required to build QEMU, so we can have stricter
version requirements for Python here and can make use of new features
and drop compatibility code earlier.

This makes qemu-iotests skip all Python tests if a Python version before
3.6 is used for the build.

Suggested-by: Eduardo Habkost <[email protected]>
Signed-off-by: Kevin Wolf <[email protected]>
Reviewed-by: Eduardo Habkost <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Vladimir Sementsov-Ogievskiy <[email protected]>
---
 tests/qemu-iotests/check | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index 875399d79f..588c453a94 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -633,6 +633,12 @@ then
     export SOCKET_SCM_HELPER="$build_iotests/socket_scm_helper"
 fi
 
+python_usable=false
+if $PYTHON -c 'import sys; sys.exit(0 if sys.version_info >= (3,6) else 1)'
+then
+    python_usable=true
+fi
+
 default_machine=$($QEMU_PROG -machine help | sed -n '/(default)/ s/ .*//p')
 default_alias_machine=$($QEMU_PROG -machine help | \
    sed -n "/(alias of $default_machine)/ { s/ .*//p; q; }")
@@ -809,7 +815,12 @@ do
         start=$(_wallclock)
 
         if [ "$(head -n 1 "$source_iotests/$seq")" == "#!/usr/bin/env python" 
]; then
-            run_command="$PYTHON $seq"
+            if $python_usable; then
+                run_command="$PYTHON $seq"
+            else
+                run_command="false"
+                echo "Unsupported Python version" > $seq.notrun
+            fi
         else
             run_command="./$seq"
         fi
-- 
2.20.1


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