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configure: Insist on a Python 2, not Python 3

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Our Python scripts require Python 2 and will fail on Python 3, eg:
  File "/home/petmay01/linaro/qemu-from-laptop/qemu/scripts/qapi-commands.py", line 378
      except getopt.GetoptError, err:
                               ^
  SyntaxError: invalid syntax

Add a check to configure that Python is not a Python 3, so we can
fail with a comprehensible error rather than an obscure one.

Reported-by: Boris Matti <swiftos@lavabit.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit is contained in:
Peter Maydell 2012-04-12 19:09:52 +01:00 committed by Stefan Hajnoczi
parent d6ef40bf18
commit 6ccea1e4d9
1 changed files with 8 additions and 0 deletions
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8
configure vendored
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@ -1242,6 +1242,14 @@ if ! has $python; then
exit 1 exit 1
fi fi
# Note that if the Python conditional here evaluates True we will exit
# with status 1 which is a shell 'false' value.
if ! "$python" -c 'import sys; sys.exit(sys.version_info[0] >= 3)'; then
echo "Python 2 required but '$python' is version 3 or better."
echo "Use --python=/path/to/python to specify a Python 2."
exit 1
fi
if test -z "$target_list" ; then if test -z "$target_list" ; then
target_list="$default_target_list" target_list="$default_target_list"
else else